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  • 1
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    Characterization of submarine ground water discharge offshore of south-eastern Sicily-SGD collaboration (2007)
    Elsevier
    Details
    Publication Date: 2022-06-07
    Description: A complex approach in characterisation of submarine groundwater discharge (SGD) off south-eastern Sicily comprising applications of radioactive and non-radioactive tracers, direct seepage measurements, geophysical surveys and a numerical modelling is presented. SGD fluxes in the Donnalucata boat basin were estimated by direct seepage measurements to be from 4 to 12 L s 1, which are comparable with the total SGD flux in the basin of 17 L s 1 obtained from radon measurements. The integrated SGD flux over the Donnalucata coast estimated on the basis of Ra isotopes was around 60 m3 s 1 per km of the coast. Spatial variations of SGD were observed in the Donnalucata boat basin, the average 222Rn activity concentration in seawater varied fromw0.1 kBq m 3 to 3.7 kBq m 3 showing an inverse relationship with salinity. The continuous monitoring carried out at the site closest to the coast has revealed an inverse relationship of 222Rn activity concentration on the tide. The 222Rn concentrations in seawater varied from 2.3 kBq m 3 during high tides to 4.8 kBq m 3 during low tides, thus confirming an influence of the tide on submarine groundwater discharge. Stable isotopes (d2H and d18O) showed that SGD samples consist up to 50% of groundwater. Geo-electrical measurements showed a spatial variability of the salt/ fresh water interface and its complex transformation in the coastal zone. The presented results imply that in the studied Donnalucata site there are at least two different sources of SGD, one superficial, represented by mixed fresh water and seawater, and the second one which originates in a deeper limestone aquifer.
    Description: Published
    Description: 81-101
    Description: JCR Journal
    Description: reserved
    Keywords: Submarine groundwater discharge ; Groundwater ; Seawater ; Radioactive and stable isotopes; ; Seepage measurement ; Geophysical survey ; Numerical modelling ; Mediterranean Sea ; 03. Hydrosphere::03.02. Hydrology::03.02.03. Groundwater processes
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
    Electronic Resource
    Electronic Resource
    Glucose-6-phosphate dehydrogenase deficiency and colour-vision studies in Indian Muslims (1972)
    Springer
    Human genetics 〈Berlin〉 15 (1972), S. 90-92 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Fünf Gruppen indischer Muslims wurden auf G-6-PD Mangel und Farbenblindheit hin untersucht. Unter Moplahs und Bohras fanden sich keine farbblinden Personen. Unter Khojas und in einer gemischten Muslimgruppe wurde G-6-PD Mangel in einer Häufigkeit von 2% beobachtet. Die Daten werden mit denen der anderen indischen Bevölkerungen verglichen.
    Notes: Summary 5 groups of Indian Muslims have been studied for G-6-PD deficiency and colour blindness. It was observed that no colour-blind person was found in Moplahs and Bohras. The incidence of G-6-PD deficiency was 2% in Khojas and mixed Muslim group. Findings are discussed in the light of available data on Indian populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273438
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  • 3
    Electronic Resource
    Electronic Resource
    Tereunsaturated polyesters (1992)
    Springer
    Journal of materials science 27 (1992), S. 4577-4581 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Four tereunsaturated polyesters (TUPs) based on terephthalic acid, maleic anhydride and polyethylene glycol, molecular weight 200 (PEG-200), have been formulated, synthesized and characterised. The effect of variation of styrene monomer and alumina trihydrate (Al2O3·3H2O) filler has been studied on TUP-1 which possesses promising characteristics. Based on these characteristics, TUP-1 (III) with 20% Al2O3·3H2O filler has been selected for inhibition and static evaluation of double-base rocket propellants. The results indicate that it is a potential inhibitor for double-base propellants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01165990
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  • 4
    Electronic Resource
    Electronic Resource
    Microbial growth on hydrocarbons: Role of flocs (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 21 (1979), S. 337-339 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260210219
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  • 5
    Electronic Resource
    Electronic Resource
    Tetrachlorophthalic anhydride-based flame-retardant chloropolyesters for inhibition of double-base propellantsPresented at the 9th European conference on “Flammability & Fire Retardants” held in Austria, May 1985. (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 32 (1986), S. 5203-5214 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Seven unsaturated chloropolyesters based on tetrachlorophthalic anhydride (TCPAn) maleic anhydride (MAn), and propylene glycol (PG) (designated as CP-1) and TCPAn, MAn, and polyethylene glycol molecular weight 200 (PEG-200) (designated as CP-2), and TCPAn, MAn, and mixed glycols (PG & PEG-200 in different molar proportions) and designated as CPM-2, CPM-4, CPM-6, etc. (depending upon molar proportions) have been synthesized. The flameretardant characteristics have been assigned by measuring heat resistance (loss in weight) and flame retardance (burning rate), and it is found that in these chloropolyesters thermal stability increases as chlorine percentage increases. In addition, these chloropolyesters have been characterized for gel time, exotherm peak temperature, tensile strength, percentage elongation and bond strength, nitroglycerine absorption, and cross-link density. Based on these properties, CPM-9 with 30% styrene (designated as CPM-9s) has been selected for inhibition and static evaluation trials, after conditioning at ambient, cold (-40°C), and hot (+50°C) temperatures. The nature of pressure-time profiles indicate the suitability of “CPM-9s” for the inhibition of double-base (containing 2-NDPA) propellants.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1986.070320535
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  • 6
    Electronic Resource
    Electronic Resource
    Tetrachlorophthalic anhydride-based flame-retardant chloropolyesters for inhibition of double-base propellants (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 33 (1987), S. 2263-2264 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1987.070330635
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  • 7
    Electronic Resource
    Electronic Resource
    Kinetics of nitroglycerine migration through unsaturated non-halo and halo polyesters (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 35 (1994), S. 257-261 
    Details
    ISSN: 0959-8103
    Keywords: non-halo and halo polyesters ; nitroglycerine migration ; inhibitors ; kinetics ; diffusion ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The diffusion coefficients (D) of nitroglycerine (NG) migration through cured non-halo and halo polyesters have been calculated with the help of M∞ determined experimentally and Fick's Law. The calculated NG migrations at different time intervals compare very closely with the corresponding NG migrations determined experimentally. The concentration profiles at various locations in thin sheets of non-halo and halo polyesters have also been calculated.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pi.1994.210350307
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  • 8
    Electronic Resource
    Electronic Resource
    High pressure non-isothermal processing, of linear polyethylenesPresented at the 33rd ANTEC, Atlanta, Georgia, May 5-8, 1975. (1976)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 16 (1976), S. 15-24 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Articles with increased rigidity can be obtained by compression molding at high pressures as shown by experiments with five types of linear polyethylene. The materials, with weight average molecular weight ranging up to 1,000,000 were molded at pressures as high as 80,000 psi. The material temperature was 149-204°C, and the tooling was at 38°C. The duration of load was typically 3 mins, and the thickness of the molded disks was 12.7 mm. The results show that at high molding pressure the tensile modulus of the material is nearly twice that of materials molded conventionally at low pressures. This increase in modulus occurs for all the materials studied and even for a duration of load of only one min. The causes for this large increase in modulus were investigated with the help of density and melting point measurements and optical and electron microscopy. It was observed that the spherulites showed a distinctive and systematic change with the forming pressure. A hypothesis is proposed to explain the high modulus phenomenon on the basis of the kinetics of spherulite formation.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760160104
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  • 9
    Electronic Resource
    Electronic Resource
    Review of forging, stamping, and other solid-phase forming processes (1979)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 19 (1979), S. 474-481 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: In the last ten years, a considerable amount of work has been conducted on many different processes distinct from common plastics processing methods such as injection molding, extrusion, and compression molding. Perhaps the most common feature of these new techniques is that they resemble more the methods used for fabricating metallic materials in solid phase. However, there is a lack of uniform terminology. More importantly, the commercial acceptance and applicability of these processes have been slow. This review attempts to summarize the important findings of various publications and, whenever possible, to give information about potential or actual industrial applications. The purpose is to provide a brief overview of the state-of-the-art of the whole technology. Advantages, disadvantages, and the need for more work are pointed out as they relate to different processes and to crystalline and amorphous materials. A few instances where material was heated beyond the melting temperature by a small amount are included in the review when the processing method was similar to solid-phase forming.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760190703
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  • 10
    Electronic Resource
    Electronic Resource
    Comparative study of unsaturated halo and nonhalo polyesters and inhibition of double-base rocket propellants (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 50 (1993), S. 1655-1664 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Unsaturated halo and nonhalo polyesters, based on tetrachlorophthalic anhydride, tetrabromophthalic anhydride, and phthalic anhydride with diethylene glycol and maleic anhydride, have been synthesized, using a “2-step” polyesterification process. These were mixed with 35% styrene monomer and 0.02% hydroquinone. The structural aspects of halo and nonhalo polyesters have been studied by IR and NMR. Further, these polyesters have been characterized for various properties. A comparison of various properties suggests that tensile strength, bond strength, heat resistance, flame retardance, gel time, and oxygen index follow the order as BP-35 〉 CP-35 〉 NHP-35, whereas the order for other properties, such as exotherm peak temperature, thermal conductivity, % elongation, and nitroglycerine absorption, is BP-35 〈 CP-35 〈 NHP-35. Variation in the properties of cured halo and nonhalo polyesters has been discussed in terms of structural considerations. The nature of P-t profile of inhibited double-base (DB) rocket propellants on static evaluation suggests that CP-35 is a potential inhibitor for DB propellants. © 1993 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070500920
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