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  • Marine Fisheries Research Department, Southeast Asian Fisheries Development Center  (52)
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  • 1
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    Dordrecht : Springer
    Keywords: Chemistry ; Mathematics ; Computer science ; Logic design
    ISBN: 9781402042232
    Language: English
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  • 2
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    Dordrecht : Springer
    Keywords: Biochemistry ; Biochemistry ; Chemistry ; Chemistry, Physical organic
    ISBN: 9781402044076
    Language: English
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  • 3
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    Dordrecht : Springer
    Keywords: Chemistry ; Chemistry ; Mathematics ; Computer graphics ; Nanotechnology
    ISBN: 9781402060205
    Language: English
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  • 4
    Keywords: Biochemistry ; Biology ; Data processing ; Biomedical engineering ; Chemistry ; Chemistry, Physical organic ; Materials
    ISBN: 9781402081842
    Language: English
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  • 5
    Keywords: Chemistry ; Chemistry ; Chemistry ; Mathematics ; Condensed matter ; Quantum optics
    ISBN: 9781402048500
    Language: English
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  • 6
    Keywords: Chemistry ; Engineering ; Magnetism ; Materials ; Optical materials
    ISBN: 9781402087967
    Language: English
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  • 7
    Keywords: Chemistry ; Chemistry, Physical organic ; Condensed matter ; Quantum theory
    ISBN: 9781402087073
    Language: English
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  • 8
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    Dordrecht : Springer
    Keywords: Chemistry, Physical organic ; Chemistry, inorganic ; Chemistry ; Mathematics ; Materials ; Mathematics ; Physics
    ISBN: 9781402066603
    Language: English
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  • 9
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    Dordrecht : Springer
    Keywords: Chemical engineering ; Chemistry ; Chemistry, Physical organic ; Polymers ; Thermodynamics ; Water pollution
    ISBN: 9781402043826
    Language: English
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  • 10
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    Dordrecht : Springer
    Keywords: Catalysis ; Chemical engineering ; Chemistry ; Chemistry, Physical organic ; Chemistry ; Mathematics ; Surfaces (Physics)
    ISBN: 9781402044052
    Language: English
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  • 11
    Keywords: Chemistry ; Chemistry ; Mathematics ; Computer simulation ; Computer software ; Weights and measures
    ISBN: 9781402069451
    Language: English
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  • 12
    Keywords: Biology ; Data processing ; Chemistry ; Chemistry, Physical organic ; Materials ; Nanotechnology
    ISBN: 9781402081897
    Language: English
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  • 13
    Keywords: Catalysis ; Chemistry ; Condensed matter ; Materials ; Renewable energy sources
    ISBN: 9781402034985
    Language: English
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  • 14
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    Dordrecht : Springer
    Keywords: Biology ; Data processing ; Biomedical engineering ; Chemistry
    ISBN: 9781402035876
    Language: English
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  • 15
    Keywords: Chemistry ; Chemistry, Physical organic ; Chemistry ; Mathematics ; Computer simulation
    ISBN: 9781402036903
    Language: English
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  • 16
    Keywords: Biochemistry ; Bioinformatics ; Chemistry ; Chemistry, Organic ; Medicine
    ISBN: 9781402050015
    Language: English
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  • 17
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    Dordrecht : Springer
    Keywords: Chemistry
    ISBN: 9781402062919
    Language: English
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  • 18
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    Dordrecht : Springer
    Keywords: Chemistry ; Chemistry, Physical organic ; Chemistry ; Mathematics ; Quantum theory
    ISBN: 9781402085468
    Language: English
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  • 19
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    Dordrecht : Springer
    Keywords: Chemistry ; Chemistry, Organic ; Chemistry, Physical organic ; Chemistry, inorganic ; Polymers
    ISBN: 9781402023545
    Language: English
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  • 20
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    Dordrecht : Springer
    Keywords: Chemistry ; Chemistry, Physical organic ; Chemistry, inorganic ; Mechanics, applied ; Molecular structure ; Quantum theory
    ISBN: 9781402036880
    Language: English
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  • 21
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    Dordrecht : Springer
    Keywords: Chemistry ; Chemistry, Organic ; Chemistry ; Mathematics
    ISBN: 9781402048513
    Language: English
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  • 22
    Keywords: Chemistry ; Electric engineering ; Nanotechnology ; Optical materials ; Surfaces (Physics)
    ISBN: 9781402048128
    Language: English
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  • 23
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    Dordrecht : Springer
    Keywords: Chemistry ; Chemistry, Physical organic ; Chemistry ; Mathematics ; Crystallography
    ISBN: 9781402048531
    Language: English
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  • 24
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    Dordrecht : Springer
    Keywords: Analytical biochemistry ; Chemistry ; Chemistry, Physical organic ; Crystallography ; Molecular structure ; Nanotechnology
    ISBN: 9781402059414
    Language: English
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  • 25
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    Dordrecht : Springer
    Keywords: Analytical biochemistry ; Chemistry ; Materials ; Nanotechnology
    ISBN: 9781402053726
    Language: English
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  • 26
    Keywords: Chemistry ; Chemistry, Physical organic ; Materials ; Molecular structure ; Plasma (Ionized gases) ; Quantum theory
    ISBN: 9781402054600
    Language: English
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  • 27
    Keywords: Catalysis ; Chemistry ; Chemistry, Organic ; Materials ; Nanotechnology ; Polymers
    ISBN: 9781402060915
    Language: English
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  • 28
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    FISON | Lagos, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23226 | 19325 | 2018-03-18 14:51:17 | 23226 | Fisheries Society of Nigeria
    Publication Date: 2021-07-13
    Description: The proximate composition and amino acids assay of smoked Clarias gariepinus and Oreochromis niloticus were determined using standard procedures. The mean proximate composition of Oreochromis niloticus are 8.9% moisture, 16.00% lipids, 5.6% ash, 44.5% crude protein, 0.42% crude fiber and 24.9% NFE while Clarias gariepinus has 8.19% moisture, 15.55% lipids, 4.725 ash, 40.46% crude protein, 0.50% crude fiber and 30.58% NFE. There is therefore a nutrient variation between the 2 species of fish Oreochromis niloticus has higher crude protein, lipids, moisture and ash content than Clarias gariepinus.The amino acids profile shows that both fishes have 17 amino acids. Apart from Tryptophan, the following essential amino acids Histidine, Methionine, Threonine, Isoleucine, Leucine, Lysine, Valine and Phenylalanine are present in both fish. Oreochromis niloticus however has higher quantities of the essential amino acids except for Histidine than Clarias gariepinus
    Description: Includes:- 2 tables.;2 figs.;7 refs.
    Keywords: Chemistry ; Fisheries ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Kainji L. ; freshwater environment ; Amino acids ; Ash content ; Lipids ; Organic compounds ; Moisture ; Proteins
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 91 - 95
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  • 29
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    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23338 | 19325 | 2018-04-07 17:17:18 | 23338 | Fisheries Society of Nigeria
    Publication Date: 2021-07-14
    Description: The evaluation of Cr. Cu, Mn, Fe, Ni, Zn,As and Pb concentrations in Clarias gariepinus and Oreochromis niloticus from Lake Geriyo Yola,Adamawa, Nigeria using X - ray fluorescence (XRF) technique is discussed. The analytical samples are irradiated with high energy electrons of 109Cd to produce fluorescent X-rays was produced which passes to the Silicon-lithium detector through Mo target as a source of monochromatic X-rays. The spectrum of energy generated on the detector was processed by a Multi- Channel Analyzer to obtain analytical data. The intensity of the fluorescent X-rays on the detector is proportional to the concentration of the individual element of interest in the sample. This method can identify up to 30 or more elements at the same time. The results showed varying levels of heavy metals in the fishes. The concentrations of Cr, Mn, Cu, and Ni in the fishes were much higher than WHO and PEPA maximum permissible limits, while the concentrations of Zn and Pb were lower than the standards. The results suggest that the lake is polluted with Cr, Mn, Cu and Ni and the consumption of fishes of the lake is life threatening to man.
    Description: Includes:- 1table.;11 refs.
    Keywords: Ecology ; Chemistry ; Pollution ; Clarias gariepinus ; Oreochromis niloticus ; Nigeria ; Geriyo L. ; freshwater environment ; Heavy metals ; Fish ; X-ray fluorescence analysis ; Pollution ; Pollution effects
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 69-71
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  • 30
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    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23422 | 19325 | 2018-04-25 19:24:46 | 23422 | Fisheries Society of Nigeria
    Publication Date: 2021-07-14
    Description: Tilapia guineensis eggs were spawned and hatched in different salinities (17, 12, 7, 5, 2 and 0) ppt. The study was conducted in eight replicates. The aim of the investigation was to ascertain disparity in hatching size of Tilapia guineensis attributable to salinity. Immediately hatching was observed, body weight of five hatchlings in each replicate was individually weighed in milligramme. The individual total length of the five hatchlings was also measured in millimeter. The height of the yolk sac larva was determined with micro-metre screw gauge graduated in millimeter from the top of the yolk sac to the dorsal region of the larva. Data obtained were used to calculate yolk sac volume. Significant differences (P〈0.01) were observed in body weight and total length of larvae hatched in different salinities. The heaviest and longest larvae were hatched in 12 ppt saline water. The yolk sac volume of larvae hatched in lower salinities were significantly higher (P〈0.01) than the yolk sac volume of larvae hatched in higher salinities. The smallest yolk sac volume was recorded in 12ppt saline water. Our findings show that salinity could be manipulated for economic production of heavier seeds of Tilapia.
    Description: Includes:- 5 tables.;6 refs.
    Keywords: Aquaculture ; Chemistry ; Tilapia guineensis ; Nigeria ; brackishwater environment ; Salinity effects ; Larvae
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 51-55
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  • 31
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    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24590 | 19325 | 2018-05-20 16:05:58 | 24590 | Fisheries Society of Nigeria
    Publication Date: 2021-07-15
    Description: The water analysis of five selected ponds in Ado-Ekiti in Ekiti State, was carried out to determine their suitability for fish culture. Pa rameters analyzed were: Temperature, Turbidity, Carbon (IV) oxide, Alkalinity, Hardness, pH and Dissolved oxygen. Values for temperature ranged between 20.0~'C and 29.0~'C, Turbidity values were between 46.0-50.2cm, Carbon (IV) oxide: 11.5-12.2mg/litre; alkalinity: 100-120mg/liter; hardness: 110-200mg/litre; pH: 6.8-7.8 and dissolved oxygen: 5.8-6.8mg/liter. The values obtained were found to be within acceptable range for fish production.
    Description: Includes: 10 references.
    Keywords: Aquaculture ; Chemistry ; Nigeria ; Physico-chemical parameter ; Fish pond ; Ado-Ekiti ; Fish production ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 97-100
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  • 32
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26301 | 23782 | 2019-03-27 05:53:49 | 26301 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Keywords: Aquaculture ; Chemistry ; Fisheries ; Philippines ; Pesticides ; Cultured organisms ; Biological sampling ; Fish ; Fishery products ; Quality assurance ; Biochemical analysis ; Lethal limits
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 84-89
    Format: 6
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  • 33
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26289 | 23782 | 2019-03-13 01:57:17 | 26289 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Keywords: Chemistry ; Education ; Technology transfer ; Chemical pollution ; Training ; Curricula
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 3-4
    Format: 2
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  • 34
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26829 | 23782 | 2019-11-19 01:08:33 | 26829 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The paper provides the methodology in lipid extraction from fish using the Modified Folch's Method. Instructions on sample preparation, and the apparatus and reagents needed are presented. Detailed procedures in lipid extraction are provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications ; Lipids
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: C-2.1-C-2.2
    Format: 2
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  • 35
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26832 | 23782 | 2019-11-19 00:56:39 | 26832 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The paper provides the methodology in determination of free fatty acids (FFA) in fish.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Food technology ; Standards ; Specifications ; Fatty acids
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: C-5.3
    Format: 1
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  • 36
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26838 | 23782 | 2019-11-19 00:36:53 | 26838 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The paper provides the methodology in the preparation of methyl esters by boron trifluoride method in fish. Instructions on sample preparation and the apparatus and reagents needed are presented. Detailed procedures are also provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Food technology ; Standards ; Specifications ; Fish oils ; Fats ; Fatty acids ; Esters ; Lipids
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: C-11.1-C-11.2
    Format: 2
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  • 37
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26835 | 23782 | 2019-11-19 00:46:29 | 26835 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The paper provides the methodology in the determination of thiobarbituric acid (TBA) number in fish fat. The apparatus and reagents needed are presented. Detailed procedures and calculations are also presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Food technology ; Standards ; Specifications ; Fish oils ; Fats ; Fatty acids
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: C-8.1-C-8.3
    Format: 3
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  • 38
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26837 | 23782 | 2019-11-19 00:39:35 | 26837 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The paper provides the methodology in the determination of the degree of lipid oxidation by gas chromatography. Instructions on sample preparation and the detailed procedures and calculation are provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Food technology ; Standards ; Specifications ; Lipids ; Fats ; Fatty acids ; Oxidation ; Chromatographic techniques
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: C-10.1
    Format: 1
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  • 39
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26840 | 23782 | 2019-11-15 07:59:29 | 26840 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The paper provides the methodology in lipid determination of monosodium L-glutamate (MSG) content in fish jelly products. Instructions on sample preparation and the reagents needed are presented. Detailed procedures calculation are also provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Additives ; Food additives ; Food
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: D-2.1-D-2.3
    Format: 3
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  • 40
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26841 | 23782 | 2019-11-15 07:56:22 | 26841 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The paper provides the methodology in the determination of sugar (sucrose) in fish product by Somogyi's method. Instructions for sample preparation and the reagents needed are presented. Detailed procedures in the determination of the sugar in a sample are provided.
    Keywords: Chemistry ; Fisheries ; Fishery industry ; Food technology ; Standards ; Specifications ; Saccharides ; Products
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: D-3.1-D-3.4
    Format: 4
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  • 41
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26846 | 23782 | 2019-11-15 07:46:46 | 26846 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The aerobic plate count provides an estimate of the number of viable microorganisms in the food according to the medium used and the time and temperature incubation. Presented in the paper is the aerobic plate count procedure using the spread plate method. The culture media, apparatus, sample preparation, and the detailed procedures and the calculation of aerobic plate count are also provided in the paper.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Aerobic bacteria ; Microbiological analysis ; Microorganisms
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: E-2.1-E-2.3
    Format: 3
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  • 42
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26845 | 23782 | 2019-11-15 07:48:51 | 26845 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Proper handling of samples is presented in the paper. Specifically, the procedures in the proper collection, transport, and storage of samples are presented. Moreover, the procedures of monitoring of the condition of samples in a container, and thawing of frozen samples are also provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Fish handling ; Samples ; Sample contamination ; Sample storage
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: E-1.1
    Format: 1
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  • 43
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26844 | 23782 | 2019-11-15 07:51:20 | 26844 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Boric acid and borates were commonly used as preservatives. It acts as an antimicrobial agent; however it is not permitted in the fishery products. The paper provides the methodology in the determination of boric acid and borates in fishery products. Instruction for sample preparation and the reagents needed are presented. Detailed procedures in the determination of boric acid and borates in a sample are provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Additives ; Food additives ; Borate minerals
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: D-6.1-D-6.2
    Format: 2
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  • 44
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26849 | 23782 | 2019-11-15 07:41:06 | 26849 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Staphylococcus aureus is a common organism on the skin and in the nasal passages of approximately 50% of the population. Heat-treated seafood may become contaminated with this organism by poor handling, then storage at improper temperatures allows the organism to multiply and produce its toxin. This type of food poisoning may be avoided by practicing strict personal hygiene, thorough cleaning and disinfection of equipment, and storage of susceptible food at temperatures below 10°C or above 60°C. Presented in the paper is the methodology of determining S. aureus in fish and fishery products.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Aerobic bacteria ; Microbiological analysis ; Microorganisms ; Pathogenic bacteria ; Pathogens ; Health and safety ; Public health ; Microbial contamination ; Staphylococcus aureus
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: E-5.1-E-5.4
    Format: 4
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  • 45
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26848 | 23782 | 2019-11-15 07:45:03 | 26848 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Coliforms are Gram-negative, non-sporing, facultatively anaerobic rods which ferment lactose, producing acid and gas within 48 hrs and they belong to the family Enterobacteriaceae. Presented in the paper is the methodology of examining the presence of coliforms and E. coli for fish and fishery products.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Aerobic bacteria ; Microbiological analysis ; Microorganisms ; Microbial contamination ; Microbiology ; Pathogens ; Escherichia coli
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: E-3.1-E-3.4
    Format: 4
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  • 46
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26850 | 23782 | 2019-11-15 07:39:11 | 26850 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Streptococci are gram-positive cocci, sometimes coccobacilli, arranged in chains. This group of streptococci resides in the intestine of warm-blooded animals. They are bile resistant and capable of growth at 45°C. Fecal streptococci form part of the microflora of many foods without necessarily indicating poor hygiene. They are found in many fermented foods, such as cheese and raw sausage, and often take part in the fermentation process. However, in meat products which have received a severe heat process, the presence of excess numbers of fecal streptococci indicates unhygienic handling and/or faulty storage. Presented in the paper is the methodology of determining the presence of fecal streptococci in fish and fishery products.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Aerobic bacteria ; Microbiological analysis ; Microorganisms ; Pathogenic bacteria ; Pathogens ; Health and safety ; Public health ; Microbial contamination
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: E-6.1-E-6.3
    Format: 3
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  • 47
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26847 | 23782 | 2019-11-15 07:43:06 | 26847 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Salmonella is a gram-negative bacterium of the family Enterobacteriaceae. Salmonella lives in animal and human intestines and is shed through feces, which usually infects humans through contaminated water or food. The paper presents the methodology of determining the presence of Salmonella and Shigella in fish and fishery products.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Aerobic bacteria ; Microbiological analysis ; Microorganisms ; Pathogenic bacteria ; Pathogens ; Health and safety ; Public health ; Microbial contamination ; Salmonella
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26865 | 23782 | 2019-11-05 03:25:17 | 26865 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: A review is made of studies conducted on cryoprotectants for use in the frozen storage of processed fishery products, such as surimi. Some 150 compounds were screened for cryoprotective effects on fish actomyosin; the findings of experiments investigating the behaviour of carp actomyosin, and fish myosin, actin and other constituent proteins during frozen storage are described. The mechanism of freeze denaturation and of the effects of cryoprotectants is outlined and the application of cryoprotectants in the development of new fish gel products considered.
    Keywords: Chemistry ; Fisheries ; Food technology ; Product development ; Freezing storage
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    Format: application/pdf
    Format: 64-67
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    FISON | Minna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24067 | 19325 | 2018-05-10 10:15:21 | 24067 | Fisheries Society of Nigeria
    Publication Date: 2021-07-15
    Description: This study focused on the assessment of Terminalia suparba (bark, leave and root) based diet to improve the ovulation of Clarias gariepinus brood stocks. Ten female and ten male brood stocks were obtained from a reputable fishfarm in Ogun State, Nigeria and were fed with the diets for four weeks before the breeding exercise. The latency period observed in treatments 1 to 4 was 4hours 30minutes while the ovulation period in treatment 5 was 8 hours. There was no significant different (P〉0.05) among the means. The brood stocks in Treatment 2 (Root) has the highest fecundity count (2001) while those in Treatment 5 (control) has the least fecundity count (1496). The phytochemical analysis of the plant materials showed the presence of Alkaloids, Tannin, Phenol, Glycoside, Flavonoids, Steroids, Phlobatannin, Saponin, Anthraquinones. The physical and chemical parameters of water observed showed that dissolved oxygen value ranges from 3.28 -4.60, pH 6.5 - 8.5, temperature 28.0 - 28.8 and conductivity 8.9 - 9.20. It is therefore concluded that the inclusion of Terminalia suparba in the feed of Clarias gariepinus broodstock will not only improve ovulation but also reduce the latency period.
    Description: Includes: 5 tables;Also includes: 11 refs.
    Keywords: Aquaculture ; Chemistry ; Ecology ; Clarias gariepinus ; Nigeria ; broodstocks ; Terminalia specie ; Latency ; fecundity ; Clarias gariepinus ; freshwater environment ; Artificial feeding ; Feeding experiments ; Fecundity ; Brood stocks ; Sublimation heat ; Ovulation ; Physicochemical properties ; Fish culture
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    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24618 | 19325 | 2018-05-22 06:12:36 | 24618 | Fisheries Society of Nigeria
    Publication Date: 2021-07-15
    Description: One of the priority research projects of the Nigerian Institute for Oceanography and Marine Research (NIOMR) is broodstock development and mass propagation of silver catfish, Chrysichthys nigrodigitatus of which the broodstock is naturally abundant in New Gala River. Selected physical characteristics and water physico-chemical parameters of the upper reach of the New Calabar River at Aluu were investigated. The highest depth value of 9.20 m was recorded in the middle of the river. The width of the river measured during spring high tide and low tide were 174 m and 110 m respectively. The cross-sectional area and average flow velocity of the river were 797.13 m2 and 0.374 m/s respectively. The discharge of the river was computed as 298.13m3/s. The river water was acidic most of the period (Hydrogen ion concentration, pH: 5.12 to 7.43), with low total alkalinity values (4.00 to 12.00 mgCaCO3/L) and low total hardness values (11.5 to 51.2 mgCaCO3/L) which indicate that the river water is black and soft. There was significant (p~,0.05) seasonal variation in temperature (23.1 to 31.7~'C\}, Secchi transparency (9.30 to 19.00 cm), total hardness (11.5 to 51.2 mgCaCO3/L), dissolved oxygen (5.20 to 7.50 mg/L) and dissolved oxygen deficit (0.02 to 2.95mg/L). These results are useful for several stake holders who use the river as a sink for trade wastes, as source of water for fish farming, as source of broodstocks of Chrysichthys nigrodigitatus, as raw water for water treatment plants, and as means of transportation of industrial materials.
    Description: Includes: 16 references.
    Keywords: Chemistry ; Fisheries ; Limnology ; Chrysichthys nigrodigitatus ; Nigeria ; New Calabar River ; New calabar River ; Physical characteristics and physico-chemical features ; Seasonal variation ; freshwater environment ; automation
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    Format: application/pdf
    Format: 206-210
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    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24619 | 19325 | 2018-05-22 06:14:16 | 24619 | Fisheries Society of Nigeria
    Publication Date: 2021-07-15
    Description: Eight month physicochemical study of Dadin Kowa Dam was carried out forthnightly from July, 2011 to february 2012. Air temperature ranged from 18.25~'C ~c 28~'C ~c 0.50 to 28~'C ~c 2.16. Water tmperature ranged from 18.75~'C ~c 2.21. Transparency ranged from 11.00cm ~c 1.83 to 29.63 cm ~c ~c 2.14. Conductivity ranged from 13.00~Ks/cm ~c 13.33 to 41.38~Ks/cm ~c 5.54. Hydrogen ion (pH) ranged from 6.69 ~c 1.03 to 8.39 ~c 1.17. Dissolved oxygen ranged from 6.39mg/l ~c 1.03 to 10.14mg/l ~c 1.17. Total alkalinity ranged from o.69mg/l ~c 0.38 1.34mb/l ~c 0.02. Total ammonia ranged from 0.20mg/l ~c 0.027 to 0.83mg/l ~c 0.05. There were various levels of correlation between these parameters. There was no significant difference between both sites and months (p〉0.05) of all the parameters except total nitrogen which show a significant difference between the sites (p〈0.05) and transparency also shows a significance between the months (p〈0.05). All physicochemical parameters were almost within the tolerable limits for supporting aquatic life.
    Description: Includes: 27 references.
    Keywords: Fisheries ; Chemistry ; Nigeria ; Dadin Kowa Dam ; Physico-chemical parameters ; Fish production ; Dadin Kowa Dam ; freshwater environment ; automation
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    Format: application/pdf
    Format: application/pdf
    Format: 211-213
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26302 | 23782 | 2019-03-27 05:50:18 | 26302 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Keywords: Chemistry ; Fisheries ; Singapore ; Pesticides ; Biological sampling ; Fish ; Dried products ; Biochemical analysis ; Lethal limits
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 90-99
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26801 | 23782 | 2019-10-22 05:10:19 | 26801 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the standard procedure in the determination of ash in meat. Specifically, the procedures in the sample preparation, instrument and apparatus required, and the analytical procedures and calculation for each method are presented.
    Keywords: Chemistry ; Fisheries ; Ashes ; Ash content ; Heating ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Microbiological analysis ; Standards ; Specifications
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    Format: application/pdf
    Format: application/pdf
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26799 | 23782 | 2019-11-12 05:20:14 | 26799 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The manual provides useful guides for laboratory workers and technical personnel. The procedures for determining the physical and chemical properties of fish meat, the analysis of oils and some additives and microbiological procedures are also included.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Microbiological analysis ; Fishery products ; Processed fishery products ; Fish inspection ; Fishery industry ; Food additives ; Food technology ; Standards ; Specifications
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26839 | 23782 | 2019-11-15 08:02:24 | 26839 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Polyphosphates are commonly used in the production of fish jelly products. The paper provides the methodology in the detection of polyphosphates in fish products. Instructions on the preparation of sample solution and the apparatus and reagents needed are presented. Detailed procedures in the chromatographic separation of polyphosphates are also provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Additives ; Food additives ; Phosphates
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: D-1.1-D-1.3
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    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23326 | 19325 | 2018-04-06 16:03:20 | 23326 | Fisheries Society of Nigeria
    Publication Date: 2021-07-14
    Description: This study looked into the physicochemical and bacteriological investigation of fish and water in Aiba Reservoir. Water and fish samples collected were studied to assess their bacteriological and physicochemical characteristics and their suitability for domestic purposes. Structural questionnaires were administered to the fishermen around the reservoir and experiments were carried out in the laboratory to analyze the samples. The results showed that the total viable bacteria count was high(1.02 x 105 cfu/ml) while few Staphylococcus aureus and E. coli occurred insignificantly. The population of S. aureus and E. coli in the fish gills, liver and tissue were insignificant. The results obtained from the physicochemical analysis of the water samples showed that the reservoir has optimum water temperature of 29degreesC ~c 0.25, a pH of 7.70 ~c 0.20, dissolved Oxygen level of 7.20mgO2/1 ~c 0.20 and total hardness of 45.00 mg/ICaC03 ~c 1.05. The microbial load in the fish sample is higher than that in the water sample. Further strict hygienic measures and surveillance is recommended so as to improve the water quality and to avoid deleterious effects on the health of the Iwo inhabitants and its neighboring communities who also benefit from the reservoir.
    Description: Includes:- 2 figs.;11 refs.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Aiba Reservoir ; freshwater environment ; Physicochemical properties ; Bacteriology ; Water quality ; Water ; Bacterial counters
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    Format: 25-28
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    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23410 | 19325 | 2018-04-12 09:04:25 | 23410 | Fisheries Society of Nigeria
    Publication Date: 2021-07-14
    Description: Comparative primary production in Little Stream Farms, near Uyo was investigated in relation to physico-chemical parameters of the adjacent perennial stream and the fish ponds. Except for temperature, which showed the same values for both stations, physico-chemical variables generally showed significant difference (P〈O.05) between the pond water and the adjacent stream. Values of silicates, Turbidity (NTU), Secchi Disc Transparency and Total Suspended Solids (TSS) exhibited significantly variable trends (P〈O.05), especially in the stream water, in response to the commercial sand dredging activities upstream from the fann location. Lowest value of stream transparency (O.1M) recorded was during the peak of the sand dredging, whereas the stream water showed absolute transparency in the absence of the dredging. The water quality parameters also exhibited a general trend of significant seasonal variation (P〈O.05). Five phytoplankton families: Bacillariophyceae, Chlorophyceae, Cyanobacteria, Euglenophyceae and Dinophyceae occurred in the ponds, while three families, Bacillariophyceae, Chlorophyceae and Cyanobacteria occurred in the stream. Bacillariophyceae showed the highest relative abundance in both stations A and B.
    Description: Includes:- 1 table.;3 figs.;11 refs.
    Keywords: Aquaculture ; Chemistry ; Ecology ; Nigeria ; Akwa Ibom State ; freshwater environment ; Physicochemical properties ; Freshwater ecology ; Water quality ; Phytoplankton ; Suspended particulate matter
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 170-177
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    FISON | Akure (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23404 | 19325 | 2018-04-12 08:55:07 | 23404 | Fisheries Society of Nigeria
    Publication Date: 2021-07-14
    Description: The physico-chemical parameters of Lake Alau were monitored for four months to assess the water quality. Parameters such as temperature, transparency, conductivity, dissolved oxygen, biochemical oxygen demand, Ca, P, etc were studied in five stations (A, B, C, D and E). Water samples were collected monthly from 8:00 to l2:00noon, for four months (July - October 2008, wet season) and analysed. The physico-chemical parameters were within the ranges of unpolluted water bodies. Variation occurs in almost all the months of the study. Significant difference (P〈0.05) occurred in pH, transparency and Ca among the stations, and insignificant difference (P〉0.05) in temperature, conductivity, dissolved oxygen, biochemical oxygen demand, Mg and P. These variations may be due to effects of fertilizer application, herbicides and insecticides in irrigated farms around the Lake.
    Description: Includes:- 2 tables.;24 refs.
    Keywords: Chemistry ; Limnology ; Nigeria ; Alau L. ; freshwater environment ; Physicochemical properties ; Water quality ; Temperature ; Turbidity ; Transparency ; Dissolved oxygen
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    Format: application/pdf
    Format: application/pdf
    Format: 149-152
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    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24638 | 19325 | 2018-05-24 09:36:38 | 24638 | Fisheries Society of Nigeria
    Publication Date: 2021-07-15
    Description: Study of some Physico-chemical parameters and fish species composition of Doma Darn was carried out between the month of August 2012. Fishing communities along the dam were selected at sampling stations and collection of fish species. The values of physico-parameters obtained for stations were in the range of 28.10-92 m for depth, 27.70-28.48~'for temperature, 7.03-7.64 for PH, 7.23-7.64mg/l for dissolved oxygen (DO), 30.08-31.75 ntu for turbidity, 94.64-105.17mg/l for alkalinity and 79.17-80.58mg/l for total hardness. The result indicated that there was significant difference (p〈0.5)for depth, temperature turbidity and alkalinity, while there was no significant difference (p〈0.05) for DO, pH and water hardness among the stations. The result of these parameters among the duration shows that there was significant different (p〈0.05) in all the parameters except pH. The study revealed that there were twenty-five (25) fish species belonging to 12 families in the dam. The family Cichlidae and Mochokidae and Bagridae which has three each, While the family, Polypteridae, Channidae, Centropomidae, flepsetidae and Protopteridae has the lowest number of one (1) each. The overall result revealed that the Phvsico-chemical parameters were mostly influenced by duration and not much by stations; and parametersoaram measured were within the recommended water quality requirement for growth and survival of aquatic organisms.
    Description: Includes: 10 references.
    Keywords: Chemistry ; Fisheries ; Nigeria ; Doma Dam ; Doma Dam ; Fishing community ; Physico-chemical parameter ; Fish species ; freshwater environment ; automation
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    Format: application/pdf
    Format: application/pdf
    Format: 295-297
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26297 | 23782 | 2019-03-27 06:01:19 | 26297 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Keywords: Aquaculture ; Chemistry ; Cambodia ; Pesticides ; Cultured organisms ; Biological sampling ; Fish ; Fishery products ; Biochemical analysis ; Lethal limits
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 67-70
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26313 | 23782 | 2019-03-27 06:17:20 | 26313 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Keywords: Aquaculture ; Chemistry ; Indonesia ; Drugs ; Biological sampling ; Biochemical analysis ; Cultured organisms ; Lethal limits ; Quality control ; Penaeus monodon ; Penaeus vannamei
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 149-155
    Format: 7
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26304 | 23782 | 2019-03-27 03:53:19 | 26304 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Keywords: Aquaculture ; Chemistry ; Fisheries ; Viet Nam ; Pesticides ; Cultured organisms ; Biological sampling ; Fish ; Fishery products ; Lethal limits
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 106-109
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26314 | 23782 | 2019-03-27 06:26:14 | 26314 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Keywords: Chemistry ; Fisheries ; Malaysia ; Drugs ; Biological sampling ; Biochemical analysis ; Quality control ; Lethal limits ; Penaeus monodon
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 156-159
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26803 | 23782 | 2019-11-12 05:32:47 | 26803 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the standard procedure in the measurement of free and expressible drips. Specifically, the required apparatus, and the analytical procedures and calculations for free and expressible drips are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Microbiological analysis ; Fishery products ; Processed fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications
    Repository Name: AquaDocs
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26804 | 23782 | 2019-11-12 05:37:03 | 26804 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the standard procedure fish protein extractability and its determination. Specifically, the procedures in sampling and sample preparation, apparatus and reagents required, the protein extractability procedures and calculations for each method are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fishery industry ; Food technology ; Standards ; Proteins ; Fish
    Repository Name: AquaDocs
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26805 | 23782 | 2019-11-12 05:40:26 | 26805 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the standard procedure to a rapid method to assess the gel-forming ability of the fish meat, fish mince, leached meat, and surimi, etc. Specifically, the procedures in the sampling and sample preparation, the apparatus and reagents required, and the analytical procedures and calculations are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Processed fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Viscosity ; Minced products
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: A-6.1-A-6.2
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26806 | 23782 | 2019-11-12 05:55:49 | 26806 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the standard procedure for the quality assessment of fish jelly products and the raw materials for the production thereof. Specifically, the materials and instruments or apparatus required, the sample and test piece preparation, and measurement, measurement, and assessment for each method are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Processed fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications ; Gels
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: A-7.1-A-7.4
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26807 | 23782 | 2019-10-22 03:31:39 | 26807 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the standard procedure in protein determination using Kjeldhl method in fish meat. Specifically, the apparatus and the reagents needed and the analytical procedures and calculation are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: B-1.1-B-1.2
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26821 | 23782 | 2019-11-21 01:08:37 | 26821 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the standard procedure in protein determination using Biuret method (modified by Umemoto) in fish meat. Specifically, the apparatus and the reagents needed and the analytical procedures and calculations are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26822 | 23782 | 2019-11-21 01:02:52 | 26822 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the standard procedure in the determination of DMA-N by Dyer's colometric method using copper dithiocarbamate in fish meat. Specifically, the reagents needed and the analytical procedures in the determination of DMA are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26823 | 23782 | 2019-11-21 01:05:56 | 26823 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the determination of trimethylamine oxide (TMAO-N), trimethylamine (TMA-N), and total volatile basic nitrogen (TVB-N) by Conway's method in fish meat. Specifically, the apparatus and the reagents needed and the analytical procedures and calculations for each method are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26824 | 23782 | 2019-11-21 01:00:15 | 26824 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: Presented in the paper is the standard procedure in the determination of formaldehyde in fish meat using Nash's reagent. Specifically, the reagents and the apparatus and instruments needed in the analysis are presented. Furthermore, analytical procedures and calculations are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26836 | 23782 | 2019-11-19 00:43:28 | 26836 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The paper provides the methodology of the determination of methyl esters of fatty acids by gas chromatographic method. Methyl esters of fatty acids from fish and animal fats having 8-24 carbon atoms are separated and determined by gas chromatography. The apparatus, reagents and operating conditions are presented. Detailed procedures of the analysis of the sample are also provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Food technology ; Standards ; Specifications ; Fish oils ; Fatty acids ; Fats
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26827 | 23782 | 2019-11-19 01:11:10 | 26827 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-07-24
    Description: The paper discusses the significance of lipid analysis in fish. Fish lipids exist as phospholipids and triglycerides which deteriorate during storage due to hydrolysis and oxidation.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Lipids ; Organic compounds ; Fats ; Hydrolysis ; Chemical reactions ; Chemical degradation ; Oxidation
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26800 | 23782 | 2019-11-12 05:12:12 | 26800 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-09-24
    Description: Presented in the paper is the standard procedure in the determination of moisture in meat. Specifically, the procedures in the sample preparation, instruments required, and the analytical procedures and calculations for each method.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Microbiological analysis ; Fishery products ; Processed fishery products ; Fish inspection ; Fishery industry ; Food additives ; Food technology ; Standards ; Specifications ; Water content
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26828 | 23782 | 2019-11-19 01:05:17 | 26828 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-09-24
    Description: The paper provides the methodology in the determination of total lipid content of fresh fish without the destruction of the lipid extract. Information on the apparatus needed is presented. Detailed procedures and calculations in the determination of lipid content are provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Food technology ; Standards ; Specifications ; Lipids
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26831 | 23782 | 2019-11-19 01:00:44 | 26831 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-09-24
    Description: Acid value is a measure of the extent to which the glyceride in the oil has been hydrolysed by lipase action. The paper provides the methodology in the determination of acid value. The apparatus and reagents needed are presented. Detailed procedures in determination of acid value are provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery industry ; Food technology ; Standards ; Specifications ; Lipids
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  • 78
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26834 | 23782 | 2019-11-19 00:50:15 | 26834 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-09-24
    Description: Peroxide value is the reactive oxygen contents expressed in terms of milliequivalents (meq) of free iodine per kilogram of fat. It is determined by titrating iodine liberated from potassium iodide with sodium thiosulphate solution. The paper provides the methodology in the determination of peroxide value. The apparatus and reagents needed are presented. Detailed procedures and calculations are also provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery industry ; Food technology ; Standards ; Specifications ; Fish oils ; Oxidation
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    Format: application/pdf
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26830 | 23782 | 2019-11-19 01:03:17 | 26830 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-09-24
    Description: The paper provides the methodology in the determination of phospholipid content of fish. The apparatus and reagents needed are presented. Detailed procedures in determination of phospolipid content are provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery industry ; Food technology ; Standards ; Specifications ; Lipids
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26833 | 23782 | 2019-11-19 00:53:06 | 26833 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2021-09-24
    Description: Saponification value is the hydrolysis of esters. The paper provides the methodology in determination of saponification value of oil. Instructions on sample preparation and the apparatus and reagents needed are presented. Detailed procedures and calculations are provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery industry ; Food technology ; Standards ; Specifications ; Fish oils ; Lipids ; Fats
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  • 81
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26299 | 23782 | 2019-03-27 06:00:01 | 26299 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Keywords: Chemistry ; Fisheries ; Malaysia ; Pesticides ; Biological sampling ; Fish ; Fishery products ; Biochemical analysis ; Lethal limits
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 71-74
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26300 | 23782 | 2019-03-27 05:58:36 | 26300 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Keywords: Aquaculture ; Chemistry ; Fisheries ; Myanmar ; Pesticides ; Biological sampling ; Fish ; Fishery products ; Lethal limits
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 75-83
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26303 | 23782 | 2019-03-27 05:51:15 | 26303 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Keywords: Chemistry ; Fisheries ; Thailand ; Pesticides ; Biological sampling ; Fish ; Fishery products ; Dried products ; Lethal limits
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 100-105
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26826 | 23782 | 2019-11-21 00:56:12 | 26826 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Description: Presented in the paper is the standard procedure in the determination of K value which is an index to measure the enzymatic freshness of fish and squid. Specifically, reagents, apparatus and the analytical procedures needed and the calculations are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications
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  • 85
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26825 | 23782 | 2019-11-21 00:52:35 | 26825 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Description: Presented in the paper is the standard procedure in measuring K value in fish meat by means of the freshness testing paper technique.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fish inspection ; Fishery industry ; Food technology ; Standards ; Specifications
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  • 86
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26802 | 23782 | 2019-11-12 05:28:20 | 26802 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Description: Presented in the paper is the standard procedure in the measurement of pH in the fresh fish meat. Specifically, the procedures in sampling and sample preparation, apparatus and reagents required, and the analytical procedures are presented.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Microbiological analysis ; Fishery products ; Processed fishery products ; Fish inspection ; Fishery industry ; Food additives ; Food technology ; Standards ; Specifications ; pH
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26842 | 23782 | 2019-11-15 07:54:48 | 26842 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Description: Starch is commonly used in the production of fish jelly products as an extender and as binding agent. The paper provides the methodology in the determination of starch in fish jelly products. Instructions for sample preparation and the reagents needed are presented. Detailed procedures in the determination of the starch in a sample are provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Starch ; Additives ; Food additives
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26852 | 23782 | 2019-11-15 07:36:44 | 26852 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Description: Cholera is an acute specific infection caused by the organism, Vibrio cholera. Diagnosis may be confirmed by the presence of large numbers of the comma-shaped bacilli on direct microscopic examination of a fecal or vomitus smear, and by the isolation of the organism on culture. Fish and shellfish have been identified as vehicles of cholera. Large numbers of V. cholera must usually be ingested to cause cholera. Thus problems often occur when poor handling and inadequate refrigeration have allowed the organism to multiply. Presented in the paper is the methodology of determining the presence of Vibrio cholera in fish and fishery products.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Aerobic bacteria ; Microbiological analysis ; Microorganisms ; Pathogenic bacteria ; Pathogens ; Health and safety ; Public health ; Microbial contamination ; Vibrio cholerae
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26843 | 23782 | 2019-11-15 07:52:55 | 26843 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Description: Sodium chloride is an important additive for the production of fish jelly products. It extracts the salt soluble protein to give the gel strength of the final product. The paper provides the methodology in the determination of the amount of sodium chloride in fish jelly products. Instructions for sample preparation and the reagents needed are presented. Detailed procedures in the determination of the salt in a sample are provided.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Chemical analysis ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Additives ; Food additives ; Salts ; Sodium chloride
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    Marine Fisheries Research Department, Southeast Asian Fisheries Development Center | Singapore
    In:  http://aquaticcommons.org/id/eprint/26851 | 23782 | 2019-11-14 01:29:31 | 26851 | Southeast Asian Fisheries Development Center, Marine Fisheries Research Department
    Publication Date: 2022-08-02
    Description: Food poisoning due to Vibrio parahaemolyticus is a food-borne infection resulting from the ingestion of a large number of this organism (about 106-109 viable cells). The major symptoms are diarrhea and abdominal pain with headache, fever, and vomiting also occurring. The organisms are excreted during the acute stage of the illness after which they decrease rapidly. The differentiation of V. parahaemolyticus from other pathogenic species of Vibrio is based mainly on salt tolerance, Voges-Proskauer reaction, fermentation of sucrose, and growth at 43°C. Presented in the paper is the methodology of determining the presence of Vibrio cholera in fish and fishery products.
    Keywords: Chemistry ; Fisheries ; Manuals ; Culture media ; Analysis ; Analytical techniques ; Methodology ; Fishery products ; Fishery industry ; Food technology ; Standards ; Specifications ; Aerobic bacteria ; Microbiological analysis ; Microorganisms ; Pathogenic bacteria ; Pathogens ; Health and safety ; Public health ; Microbial contamination ; Vibrio parahaemolyticus ; Vibrio cholerae
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  • 91
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 150 (1987), S. 189-192 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A morphological study was made to examine the friction and wear mechanisms of ultrahigh molecular weight polyethylene in air and water by means of transmission electron microscopy of a carbon replica film of a very thin layer of the polymer surface slid against a steel ball. Electron diffractions revealed that a molecular orientation with a typical fiber pattern was formed in the friction in air, while thin ribbon-like crystals with particular crystal orientations were formed in water in a way that the sliding took place on the crystallographic a - c plane, giving rise to a low friction coefficient of the polymer.
    Additional Material: 3 Ill.
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  • 92
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 150 (1987), S. 137-150 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde der relative Wirkungsgrad von fünf handelsüblichen Stabilisatoren bei Photooxidation und thermischer Alterung von Polypropylen (PP) anhand der Änderungen der mechanischen Eigenschaften untersucht. Es wurden Polypropylenproben mit unterschiedlichem Anteil an Cyasorb UV-531 hergestellt (bezeichnet als PC0.5-31, PC1-31, PC1.5-31 und PC2-31). Der Einfluß der Photooxidation auf das thermische Verhalten ist mit Hilfe der Differentialscanningkalorimetrie und durch thermogravimetrische Analysen untersucht worden. 2-Hydroxy-4-n-octyloxybenzophenon (2 Gew.-%) war am wirksamsten, Polypropylen, gegen Verfärbung und Brüchigkeit zu stabilisieren. Bei einer Probe mit 1% Stabilisatorzusatz fanden sich nach 32 h Bestrahlung noch 81% des ursprünglichen Wertes der Streckgrenze gegenüber 18% bei unstabilisiertem PP.
    Notes: The relative effectiveness of five commercially available stabilizers on the photooxidation and thermal ageing of polypropylene (PP) was investigated by following changes in mechanical properties. Samples of PP containing different percentages of Cyasorb UV-531 were prepared (designated as PC0.5-31, PC1-31, PC1.5-31, and PC2-31, respectively). The effect of photooxidation on thermal behaviour was investigated by differential scanning calorimetry and thermogravimetric analysis. 2-Hydroxy-4-n-octyloxy benzophenone (2% w/w) was most effective in stabilizing PP towards discolouration and brittleness. After 32 h irradiation, 81% retention in yield strength was observed in case of PC1-31 against 18% in case of PP.
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  • 93
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The effects of the nature of the polyols used in polyurethane (PUR) synthesis on the structural transformations after ageing by UV irradiation has been studied. The investigations were performed on PUR prepared from polyester and polyether diol oligomers.The characterization of the samples before and after ageing in view of the structural changes, which influence the course of the photooxidative degradation and photocrosslinking as well as in view of changes of mechanical properties has been done. Comparative investigations were performed by spectroscopic and viscometric measurements.The results show pronounced heterogeneity of the degradative reactions, including the existence of crosslinking processes and producing thus very inhomogeneous polymeric material. The course and the intensity of photooxidative degradation of PUR differ together with changes of mechanical properties depending whether polyester or polyether polyol have been used. The processes of photooxidative degradation is less expressed in polyesterurethane then in polyurethane based on polyether, under the same conditions of experiments. Different structures of polyester diols caused the various ageing behaviour of PUR too.
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  • 94
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: QUALIFICATION OF HALS COMPOUNDSA complex method of examination has been developed suitable for the qualification of light stabilizers; by this method, according to experience, the efficacy of HALS compounds can be extensively and expediently characterized.Several light stabilizers of the HALS-type were examined and qualified, used alone or together with a UV-absorber.It has been found that, when selecting the appropriate structure for a given polymer, the weatherability of polyolefine foils is effectively increase to six-eightfold; the increase is even tenfold when the stabilizer is combined with a benzophenone-type compound.As a utilization of these experiences, a contract with the industry, led to the production of an LDPE based agricultural foil with a life-time of several years.
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  • 95
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Natural hail impact tests are scarcely available because hailstorms are limited to a small area and cannot be predicted regarding time, place and intensity. Therefore we relied on laboratory tests simulating natural hailstones by polyamide balls (5-50 mm dia.) whose final velocity could be varied according to meteorological data. So the influence of diameter (weight) and velocity of the artificial hailstones could be taken into consideration independently.The energy of damage or equivalent natural hailstone diameter were determined for 16 mm double skin sheet from PMMA as 0.2 J (14 mm dia.) for star shaped cracks and 2 J (26 mm dia.) for holes. These values do not significantly decrease after 10 years weathering. 10 mm double skin sheets from PC show an extremly high energy of damage of abt. 10 J (38 mm dia.) which decreases to a medium level of 2 J (26 mm dia.) after several years weathering. This decrease is remarkably reduced by weather resistant protective coating.As hailstorms consist to more than 80% of hailstones below 10 mm dia. (0.04 J) the mentioned sheet materials are quite hail resistant also after long weathering periods, but they cannot withstand an extreme hail catastrophe as in Munich July 12, 1984.
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  • 96
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The influence of the specimen temperature on many ageing processes is well known. Two aspects is dealt with: -Measurements of the specimen temperature on several positions of a specimen in commercial weathering devices at different exposure conditions. Technical measures to achieve to uniform ageing at all positions of a planar and homogeneous specimen. Examples from practical use.-Changing specimen temperatures (+60°C to -20°C) during the course of accelerated weathering, i.e. a combination of conventional accelerated weathering with a temperature cycle test.
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  • 97
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: An Folien (Dicke 100 pm) aus isotaktischem Polypropylen mit verschiedenen Antioxidansgehalten (0,0% bis 0,1%) wird die thermooxidative Alterunq mit der isothermen Langzeit-Differential-Thermo-Analyse (ILDTA) bis zu Temperaturen weit unter dem Kristallitschmelzbereich verfolqt und die Messwerte mit Ergebnissen aus dem Zeitstand-Zugversuch korreliert. Dabei zeigt sich, daß aus Messunqen mit der ILDTA bereits vor Einsetzen der autokatalytischen Zersetzunq sreaktion Ruckschlüsse auf die thermische Vorqeschichte der Proben und Aussagen auf das rnit einem Abfall der mechanischen Eigenschaften verbundene Ende der thermo-oxidativen Stabilität des Polymeren getroffen werden können.Weiters bietet die ILDTA die Moglichkeit, durch den direkten Zusamenhang zwischen Oxidationszeit und Antioxidansögehalt die örtliche Stabilisatorverteilung in Platten und in Folien zu bestimmen und damit Diffusionsvorqange zu verfolgen.
    Notes: Thermo-oxidative ageing processes were investigated in films (100 μm thick) made from isotactic polypropylene with different antioxidant concentrations between 0% and 0.1% using isothermal long-term differential thermal analysis (ILDTA). The end of the oven life of polypropylene coincided with the loss of mechanical properties which was confirmed by tensile tests at temperatures far below the crystallite melting range. Already prior to the beginning of autocatalytic decomposition, ILDTA experiments permits conclusions to be drawn on the thermal history of the specimens and statements made regarding the end of thermo-oxidative stability of the polymer, which is accompanied by a deterioration in the mechanical properties.In consequence of the correlation between oxidation time and antioxidant concentration the local antioxidant concentration in sheets or films can be measured by ILDTA. Thus, investigating the diffusion of an antioxidant in polypropylene using ILDTA is possible.
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  • 98
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Größenverteilungsfunktion von Dispersionen mit extrem breiter Verteilung (Durchmesserbereich 20 〈 D 〈 2000 nm) kann in der analytischen Ultrazentrifuge (AUC) nicht durch eine Standardmethode, z. B. durch Messung der Trübung τ bei einer einzigen Konzentration, bestimmt werden, weil sich die spezifische Trübung τ/c von sehr kleinen und sehr großen Teilchen zu stark unterscheidet. Um dieses Problem zu lösen, haben wir eine neue AUC-Technik, die sogenannte Coupling-PSD-Technik entwickelt. Dabei werden zwei unterschiedliche Konzentrationen derselben Dispersion gleichzeitig in einem einzigen AUC-Lauf vermessen und zwei korrespondierende Lichtintensitiit-Zeit-Kurven aufgezeichnet. Bei einer niedrigen Standardkonzentration cs werden hauptsachlich die größeren Teilchen erfaßt während bei einer 5 bis 30 mal heheren Konzentration ch vor allem die kleineren Teilchen registriert werden. Die beiden I(t)-Kurven werden mathematisch verkniipft und unter Verwendung des Stokeschen Gesetzes und der Streutheorie von Mie für homogene isotrope Kugeln in die gesuchte breite Verteilungsfunktion umgerechnet. Wir benutzen eine mit einem 8-Zellen-Rotor und einem Multiplexer ausgestattete AUC. Da sehr groBe und sehr kleine Teilchen gleichzeitig in einem einzigen Zentrifugenlauf bestimmt werden, kennen wir nicht mehr wie zuvor eine konstante Rotorgeschwindigkeit N anwenden, sondern miissen diese mit Hilfe eines Geschwindigkeitsprogramms N(t) innerhalb einer Stunde von 0 auf 40000 U/min erhehen.
    Notes: The particle size distribution (PSD) of extremely broad distributed dispersions (diameter range 20 〈 D 〈 2000 nm) is not possible to be measured by analytical ultracentrifuge (AUC) using the standard technique, i.e. measuring turbidity τ at a single concentration c, because the specific turbidity τ/c varies too much between very small and very large particles. To solve this problem we have developed a new AUC technique, the so-called Coupling-PSD-Technique. Here two different concentrations of the same dispersion are measured simultaneously by one single AUC run with two corresponding curves of light intensity I vs. time t being registered. At a low standard concentration cs, mainly the larger particles are detected, while at a concentration ch 5 to 30 times higher mainly the smaller particles are registered. Both I(t)-curves are coupled mathematically and transformed into the requested broad distribution curve employing Stokes' law and Mie's light scattering theory for homogeneous isotropic spheres.We use an AUC together with an 8-cells-rotor and a multiplexer. Because very large and very small particles are to be measured simultaneously in one single run, we can no more apply a constant rotor speed N as before, but by means of a time program N(t) we always have to increase the rotor speed from 0 to 40000 rpm within one hour.
    Additional Material: 7 Ill.
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  • 99
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    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 162 (1988), S. 135-148 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die chemische Modifizierung von Polyvinylchlorid (PVC) durch ein Amin verleiht dem Polymeren höhere Reaktivität gegenüber der Pfropfcopolymerisation mit einem Vinylmonomeren. Die Pfropfcopolymerisation von Methylmethacrylat auf mit n-Butylamin modifiziertes PVC wurde thermisch mit Benzoylperoxid (Bz2O2) als Initiator oder photoaktiviert mit Benzophenon (BP) als Photosensibilisator gestartet. Das aus bestimmten Experimenten erhaltene rohe Polymerprodukt wurde durch fraktionierte Fällung in die verschiedenen Bestandteile wie Polymethylmethacrylat (PMMA, Homopolymeres), PVC-g-PMMA (Pfropfcopolymeres) und unverändertes (aminiertes) PVC aufgespalten. Die getrennten Fraktionen wurden mit Hilfe der IR-Spektroskopie und der Thermogravimetrie charakterisiert. Der Mechanismus der Pfropfcopolymerisation von den beiden verschiedenen Systemen wurde erörtert. In beiden Fällen wurden Pfropfausbeuten um 30 - 70%* und Pfropfcopolymerzusammensetzungen, PMMA/PVC (w/w) zwischen 2 und 3 erhalten.
    Notes: Chemical modification of poly(vinyl chloride), PVC, by an amine renders the polymer more reactive towards graft copolymerization with a vinyl monomer. The graft copolymerization of methyl methacrylate (MMA) on PVC modified by treatment with n-butylamine (n-BA) was started thermally at 30° using benzoyl peroxide (Bz2O2) as initiator and under photoactivation at 40° using benzophenone (BP) as photo sensitizer. The gross polymer products from selected experiments were fractionally separated into the constituent polymeric entities viz., poly(methyl methacrylate), PMMA (homopolymer), PVC-g-PMMA (graft copolymer), and unreacted (aminated) PVC following a method of fractional precipitation. The separated fractions were characterized by IR spectroscopy and thermogravimetry. The mechanisms of graft copolymerization for the two different systems have been discussed. In each case, grafting efficiencies of the order of 30-70% and graft copolymers having compositions given as PMMA/PVC (w/w) equal to 2-3 were readily obtained.
    Additional Material: 7 Ill.
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  • 100
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 162 (1988), S. 193-201 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Eine Reihe oberflächensulfonierter, makroporöser Styrol-Divinylbenzol-Copolymerer mit unterschiedlichen Gehalten an SO3H-Gruppen wurden hergestellt. Sowohl von diesen Copolymeren als auch vom nichtsulfonierten Copolymeren wurden Porenstruktur, Oberflächenhydrophilie und -polarität sowie das Sorptionsverhalten gegenüber einigen in Blut vorkommenden Substanzen bestimmt. Der Sorptionsgrad wird umso kleiner, je größer die Oberflächenpolarität ist. Die teilsulfonierten Polymeren könnten eine Anwendung in der Hämoperfusion finden.
    Notes: A series of surface sulphonated macroporous styrene-divinylbenzene (S-DVB) copolymers containing various amounts of  - SO3H groups was obtained. Porous structure, surface hydrophilicity and polarity, and sorption properties of these copolymers as well as those of starting S-DVB resin towards some substances which are present in blood were determined. The sorption degree becomes the smaller the higher is the surface polarity. The partially sulphonated copolymers may find an application in hemoperfusion.
    Additional Material: 4 Ill.
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