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  • Blackwell Publishing Ltd  (24)
  • 1995-1999  (24)
  • 1999  (9)
  • 1997  (15)
  • 1
    Electronic Resource
    Electronic Resource
    THERMAL RESISTANCE OF BACILLUS CEREUS SPORES AS AFFECTED BY ADDITIVES IN THE RECOVERY MEDIUM (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food safety 17 (1997), S. 0 
    Details
    ISSN: 1745-4565
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effects of the addition of starch, glucose, sodium chloride, sodium citrate, monopotassium phosphate and disodium phosphate to the recovery medium on apparent heat resistance of Bacillus cereus spores (ATCC 4342, 7004 and 9818) were investigated. Sodium citrate, monopotassium and disodium phosphate at concentrations of 0.1% were effective inhibitory agents for heat injured B. cereus spores especially for strain 9818, although only monopotassium and disodium phosphate caused a significant reduction (p 〈 0.05) in D-values obtained for strain 9818. Sodium chloride also had a marked effect on the recovery of heat injured spores. Concentration as low as 0.5% caused a significant reduction in the recovery rates for strains 9818 and 7004. In all cases, increasing the salt levels from 0.5 to 4% resulted in a progressive decrease in spore recovery. D-values gradually decreased as the salt content increased, although the concentrations which produced statistically significant differences (p 〈 0.05) varied among strains. The addition of starch at 0.1% resulted in a significant increase in the counts for strains 9818 and 7004. In contrast, glucose (0.1%), did not significantly modify the counts obtained Neither of these compounds affected decimal reduction times. No statistical significance (p〉0.05) differences were detected among z-values for the spores of the three strains recovered in the presence of different additives assayed. z-Values ranged from 6.67 to 8.32, with a mean value of 7.56 ± 0.46C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4565.1997.tb00171.x
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  • 2
    Electronic Resource
    Electronic Resource
    ABUNDANCE OF DUSKY DOLPHINS (LAGENORHYNCHUS OBSCURUS) OFF NORTH AND CENTRAL PATAGONIA, ARGENTINA, IN SPRING AND A COMPARISON WITH INCIDENTAL CATCH IN FISHERIES (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 15 (1999), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1999.tb00845.x
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of anther culture response in hexaploid triticale (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 116 (1997), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The androgenic response of five varieties and 10 F1 intervarietal hybrids of 6 × triticale was analysed. The overall response involved three independent phenomena: the production of embryoids, the capability of embryoids to regenerate plants, and the production of green plants. Each of these factors appeared to be controlled by independent genetic systems. From a practical point of view, the product of these three factors, the number of green haploid plants per anther (GPA), is the most reliable variable for the evaluation of genotypes. Positive heterotic effects on GPA were observed in the hybrids, which may indicate that GPA is controlled predominantly by additive genes. No correlation was found between the number of green haploid plants produced by hybrids and that yielded by the best parental line. Therefore, it is difficult to predict the yield of green haploid plants that can be produced by a hybrid simply from the number produced by its parents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1997.tb01003.x
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  • 4
    Electronic Resource
    Electronic Resource
    Does elevated atmospheric CO2 concentration inhibit mitochondrial respiration in green plants? (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 22 (1999), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: 
ATP, adenosine triphosphate
Km, Michaelis-Menton coefficient
Ca, concentration of CO2 in the air (μmol mol–1)
NAD, oxidized nicotin adenine dinucleotide
NADH, reduced nicotin adenine dinucleotide
NADP, oxidized nicotin adenine phosphate dinucleotide
NADPH, reduced nicotine adenine phosphate dinucleotide
R, rate of respiration per unit DW [μmol g 
DW–1], Rubisco, ribulose-1,5-bisphosphate carboxylase/oxygenase
Vc,max, maximum in vivo rate of carboxylation at Rubisco (μmol m–2 s–1)

There is abundant evidence that a reduction in mitochondrial respiration of plants occurs when atmospheric CO2 (Ca) is increased. Recent reviews suggest that doubling the present Ca will reduce the respiration rate [per unit dry weight (DW)] by 15 to 18%. The effect has two components: an immediate, reversible effect observed in leaves, stems, and roots of plants as well as soil microbes, and an irreversible effect which occurs as a consequence of growth in elevated Ca and appears to be specific to C3 species. The direct effect has been correlated with inhibition of certain respiratory enzymes, namely cytochrome-c-oxidase and succinate dehydrogenase, and the indirect or acclimation effect may be related to changes in tissue composition. Although no satisfactory mechanisms to explain these effects have been demonstrated, plausible mechanisms have been proposed and await experimental testing. These are carbamylation of proteins and direct inhibition of enzymes of respiration. A reduction of foliar respiration of 15% by doubling present ambient Ca would represent 3 Gt of carbon per annum in the global carbon budget.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.1999.00438.x
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  • 5
    Electronic Resource
    Electronic Resource
    Sediment transport and bedforms in a carbonate tidal inlet; Lee Stocking Island, Exumas, Bahamas (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 44 (1997), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: An active oolitic sand wave was monitored for a period of 37 days in order to address the relationship between the direction and strength of tidal currents and the resultant geometry, and amount and direction of migration of bedforms in carbonate sands. The study area is situated in a tidal channel near Lee Stocking Island (Exumas, Bahamas) containing an estimated 5.5 to 6 × 105 m3 of mobile oolitic sand. Tidal ranges within the inlet are microtidal and the maximum current velocity at the studied site is 0.6 m s−1. At least 300–400 m3 of mostly oolitic sand are formed within, or brought into, the channel area every year. The tidal inlet is subdivided into an ocean-orientated segment, in which sand waves are shaped by both flood and ebb tides, and a platform-orientated segment, where sand waves are mainly shaped by flood tides. The studied sand wave lies on the platformward flood-tide dominated segment in a water depth of 3.5.4.5 m. During the 37 days of observation, the oolitic and bioclastic sand wave migrated 4 m in the direction of the dominant flood current. The increments of migration were directly related to the strength of the tide.During each tidal cycle, bedforms formed depending on the strength of the tidal current, tidal range and their location on the sand wave. During flood tides, a steep lee and a gentle stoss side formed and current ripples and small dunes developed on the crest of the sand wave, while the trough developed only ripples. The average lee slope of the sand wave is 24.2°, and therefore steeper than typical siliciclastic sand waves. During ebb tides, portions of the crest are eroded creating a convex upward ebb stoss side, covered with climbing cuspate and linguoid ripples and composite dunes. The area between the ebb-lee side and the trough is covered with fan systems, sinuous ripples and dunes.The migration of all bedforms deviated to a variable degree from the main current direction, reflecting complex flow patterns in the tidal inlet. Small bedforms displayed the largest deviation, migrating at an angle of up to 90° and more to the dominant current direction during spring tides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3091.1997.d01-59.x
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  • 6
    Electronic Resource
    Electronic Resource
    Corn Masa and Tortillas from Extruded Instant Corn Flour Containing Hydrocolloids and Lime (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 64 (1999), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Extruded instant corn flour (EICF) samples with hydrocolloids (gums), such as gum arabic, carboxymethylcellulose (CMC), guar and xanthan and with different concentrations of lime (0.1, 0.2 and 0.3% w/w) were prepared by extrusion. The gums were added before or after thermal processing. The dehydration process followed through the weight loss (WL) in masa, the physicochemical (water absorption capacity (WAC) and WL during cooking) characteristics of masa were optimized to give longer dehydration times and tortillas with good textural (rollability, tensile strength and cutting force) properties. The lowest effective moisture diffusion coefficient (D*) was found in masa samples containing 0.2% (w/w) of lime and 0.5% (w/w) of the xanthan gum added before extrusion. These masas produce tortillas with optimum textural characteristics and highest yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1999.tb09873.x
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  • 7
    Electronic Resource
    Electronic Resource
    OBSERVATIONS OF PARTURITION IN THE MEDITERRANEAN MONK SEAL (MONACHUS MONACHUS) (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Marine mammal science 15 (1999), S. 0 
    Details
    ISSN: 1748-7692
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1748-7692.1999.tb00852.x
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  • 8
    Electronic Resource
    Electronic Resource
    High Pressure Washing to Remove Decayed Tissue and Improve Quality of Clingstone Peach Puree (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 62 (1997), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Physical and chemical characteristics were evaluated on brown rot and phomopsis decayed tissue in peaches, to investigate its removal by washing with high pressure water sprays and to evaluate quality of puree made after washing. Washing treatments were at 345 to 758 kPa for up to 10, 1-s exposures. Results indicated brown rot tissue was darker, less yellow and had more soluble solids than the softer phomopsis decayed tissue. Nearly 100% of phomopsis decayed and 70% of brown rot tissue were removed with high pressure water treatment. Removal improved the quality of peach puree, but medium/large lesions were more detrimental to quality than small lesions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1997.tb04383.x
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  • 9
    Electronic Resource
    Electronic Resource
    Salmon and Trout Analysis by PCR-RFLP for Identity Authentication (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 64 (1999), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Raw and smoked Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) were differentiated by PCR amplification of a 950 bp conserved fragment of the mitochondrial 16S rRNA gene followed by restriction site analysis with the endonucleases Hpa I and Bst Ell. Salmon PCR products digested with Hpa I yielded two fragments of 804 bp and 146 bp, while trout PCR products were not cleaved by this enzyme. However, Bst Ell did not cleave salmon PCR products while two bands of 513 bp and 437 bp were produced when trout samples were cleaved with this enzyme. This genetic marker could be very useful for detecting fraudulent substitution of lower valued smoked trout.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1999.tb15053.x
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  • 10
    Electronic Resource
    Electronic Resource
    Purification and characterization of a calcium-regulated protein kinase from beet root (Beta vulgaris) plasma membranes (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 99 (1997), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A calcium-regulated protein kinase (CRPK) associated with the plasma membrane of beet root cells was purified by deoxycholate extraction of plasma membrane proteins followed by chromatography in DEAE- and phenyl-Sepharose columns. This procedure rendered a purified CRPK preparation with a specific activity higher than 2.2 μmol mg-1min-1 using histone III-S as substrate. The molecular mass of CRPK, estimated by SDS-PAGE, was 58 kDa. Gel filtration and glycerol gradient centrifugation indicated that the native enzyme is a monomer. Phosphorylation of histone by CRPK displayed a broad pH optimum between 7.0 and 8.2, Syntide-2, a CaM-kinase II substrate, was phosphorylated much more efficiently than kemptide, Ac-MBP (4–14), CKII substrate or poly-(Glu, Tyr) 4:1. The kinetics of this enzyme can be described by a steady-state ordered mechanism in which four bound Ca2+ ions are required for the phosphorylation of the peptide substrate. After Ca2+ binding, the affinity of the enzyme for ATP was not affected while that for syntide-2 or histone decreased. Curves of kinase activity vs ATP at different syntide-2 concentrations indicated that the Km values for ATP or syntide-2 increased with increasing cosubstrate concentrations. Similar curves of kinase activity vs ATP at different histone concentrations indicated that the apparent affinities of CRPK for ATP or histone were not affected by the cosubstrate concentration. The purified CRPK was not recognized by antibodies against soybean or Arabidopsis calcium-dependent protein kinase (CDPK). These results suggest that CRPK and CDPKs could be different enzymes, although they show some similar properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1997.tb03441.x
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