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  • 1990-1994  (15)
  • Chemistry  (11)
  • dose  (2)
  • quality  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Disposition kinetics, urinary excretion and dosage regimen of kanamycin in buffalo calves following single intravenous administration (1993)
    Springer
    Veterinary research communications 17 (1993), S. 219-225 
    Details
    ISSN: 1573-7446
    Keywords: buffalo ; disposition ; dose ; kanamycin ; pharmacokinetics ; serum ; urine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The disposition kinetics and appropriate dosage regimen for kanamycin were investigated in buffalo calves following a single intravenous dose of 10 mg/kg body weight. The distribution and elimination half-lives were 0.12±0.01 h and 1.94±0.11 h, respectively. The apparent volume of distribution and total body clearance were 0.2±0.01 L/kg and 92.9±3.69 ml/kg/h, respectively. About 74% of the administered dose was excreted in urine in 24 h. A suitable dosage regimen for the intravenous administration of kanamycin was also calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01839170
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Pharmacokinetics and dosage regimen of cefotaxime in cross-bred calves following single intramuscular administration (1994)
    Springer
    Veterinary research communications 18 (1994), S. 313-318 
    Details
    ISSN: 1573-7446
    Keywords: calves ; cefotaxime ; cephalosporin ; dose ; intramuscular ; pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The pharmacokinetics, penetration into erythrocytes and plasma protein binding of cefotaxime were investigated in cross-bred calves. Following a single intramuscular dose of cefotaxime (10 mg/kg), the absorption half-life and elimination half-life were 0.13±0.03 h and 2.97±0.72 h, respectively. The apparent volume of distribution and total body clearance were 3.28±0.72 L/kg and 0.78±0.08 L/kg per h, respectively. The extent of penetration into erythrocytes was 24–40% of the total blood concentration. Cefotaxime was bound to plasma proteins of calves to the extent of 25.5–33.6%. A satisfactory intramuscular dosage regimen for cefotaxime in calves would be 11 mg/kg followed by 10 mg/kg at 7 h intervals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01839199
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Seed protein yield from someCrotalaria spp andin vitro nutritional quality of that fromC. juncea (1990)
    Springer
    Plant foods for human nutrition 40 (1990), S. 195-200 
    Details
    ISSN: 1573-9104
    Keywords: Crotalaria ; seed ; protein ; yield ; quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Seed Protein Concentrates (SPC) of 6 species ofCrotalaria were extracted and the extractabilities of SPC, total N and protein N determined. SPC of high yielding species (C. juncea) was analysed for the contents of amino acids, ash, phosphorus, sugar, starch, fibre and calories, as well as forin vitro digestibility. Results indicate the promising potential ofC. juncea for SPC yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01104142
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  • 4
    Electronic Resource
    Electronic Resource
    Yield andin vitro nutritional quality of some leguminous seed protein isolates (1991)
    Springer
    Plant foods for human nutrition 41 (1991), S. 247-251 
    Details
    ISSN: 1573-9104
    Keywords: wild legumes ; seed protein ; yield ; quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Seed protein concentrates (SPC) were extracted from 4 leguminous species and the extractabilities of total N (nitrogen), protein N and SPC determined. In addition, composition, calorie value andin vitro enzymatic digestibility of these SPCs was analysed. Results indicate the promising nutritional potential of these SPCs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02196393
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  • 5
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of epoxy resins containing chromium acrylate (1994)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 219 (1994), S. 1-10 
    Details
    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: Durch Umsetzung von Chromacrylat mit Bisphenol A und einem Überschuß Epichlorhydrin wurden neuartige Epoxid-Harze hergestellt. Epoxy-Äquivalentgewicht, Gehalt an Hydroxygruppen und hydrolysierbarem Chlor sowie die Viskosität wurden bestimmt, und die Harze wurden mittels IR- und 1H-NMR-Spektroskopie charakterisiert. Die thermischen Eigenschaften der bei 30°C für 24 h mit Ciba Geigy HY 850 (aliphatisches Amin) gehärteten Harze wurden gemessen. Die Harze besitzen eine gute thermische und chemische Stabilität und eine gute elektrische Leitfähigkeit. Die Reaktion verläuft nach erster Ordnung; die Aktivierungsenergie beträgt 47 kJ mol-1 bzw. 34 kJ mol-1 mit bzw. ohne Chromacrylat. Aus spektroskopischen Untersuchungen wird geschlossen, daß das Chrom mit Bisphenol A einen Komplex bildet, der die Epoxidierung beschleunigt.
    Notes: Novel epoxy resins containing chromium acrylate have been synthesized by reacting chromium acrylate with bisphenol-A and excess epichlorohydrin. The quantities such as epoxy equivalent weight, hydroxy content, hydrolyzable chlorine content and viscosity have been determined. The resins have been characterized by IR and 1H NMR spectroscopy. The cured resins were evaluated for thermal properties. The curing of resins was carried out with Ciba Geigy HY 850 (aliphatic amine adduct) at 30°C for 24 h. The cured resins have excellent thermal and chemical resistance, in addition to an excellent electrical conductivity. The reaction follows first order kinetics with an activation energy of 47 kJ mol-1 and 34 kJ mol-1 in the presence and absence of chromium acrylate, respectively. The chromium forms a complex with bisphenol-A, as indicated by spectroscopic studies, which increases epoxidation.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1994.052190101
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Radical terpolymerization of zincacrylate, acrylonitrile, and styrene initiated by As2S3-styrene complex (1994)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 34 (1994), S. 528-531 
    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: Terpolymerization was investigated by dilatometry for zincacrylate (ZnA2), acrylonitrile (AN), and styrene (St), radically initiated by a As2S3-styrene complex (I) in dimethyl sulphoxide (DMSO), at 90 ± 0.1°C for 1 h under inert atmosphere. The system follows non-ideal kinetics, due to primary radical termination as well as a degradative chain transfer reaction. The kinetic expression for the system is Rpα(I)0.27 (St)0.31 (AN) 0.22[ZnA2]0.12. The value for the activation energy and kp2/kt are 55 kJ mol-1 and 1.87 × 10-7 1 mol-1 s-1 respectively. The terpolymer has been characterized by IR and NMR spectroscopy. The thermal stability and solubility of the terpolymer have also been studied.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760340611
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  • 7
    Electronic Resource
    Electronic Resource
    Measurement and regulation of the culture reduction state in Clostridium acetobutylicum (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 38 (1991), S. 181-190 
    Details
    ISSN: 0006-3592
    Keywords: solventogenic metabolism ; NADH content ; NADH fluorescence ; continuous fermentation ; butanol biosynthesis ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: With a constant glucose feed concentration, the change in the continuous culture dillution rate resulted in an altered fermentation profile and the cellular NADH content. The cultures growing at high dillution rates demonstrated an oxidative metabolism low NADH and butanol concentrations. The low specific NADH flourescence (F/X) at high butanol production rates suggested that a rapid regeneration of NADH to NAD is essential for a high solventogenic culture activity. The culture florescence and butanol concentration remained constant in the solventogenic dilution rate range of D = 0.05-0.2 h-1 with an inverse relationship between the specific flourescence (F/X) and the specific butanol production rate, qB. Flourometric NADH observations were confirmed by enzymatic NADH determination. The stiochiometric “Fermentation Equation” was used to check the experimental data consistency and to investigate the role of the available biosynthetic and reduction energy on the culture metabolic activities under different growth conditions. The butanol concentration in the broth was stabilized in a fed-batch process when the culture NADH fluorescence was being controlled through the addition of fresh medium.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260380210
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  • 8
    Electronic Resource
    Electronic Resource
    NADH fluorscence in a carbon-limited fermentation (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 38 (1991), S. 191-195 
    Details
    ISSN: 0006-3592
    Keywords: continuous flow acetone-butanol fermentations ; reduction energy ; solvent production activity ; inlet sugar concentrations ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The continuous flow acetone-butanol fermentation conducted at lowered inlet feed sugar concentrations and at a constant dilution rate D =0.075 h-1 demonstrated a significant decreases in the availability of the cell population “reduction energy” (F/X), resulting in an exclusive accumulation of intermediate acids under those conditions. The cultures resumed its solvent production activity when the inlet sugar concentration in the feed stream was increased from 20 to 40 g/L at the same low growth/dilution rates. A linear correlation between the culture reduction content (F/X) and the specific butanol rate (qB) was observed under the present conditions, indicating the necessity of the NADH availability for the increased solvent production.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260380211
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  • 9
    Electronic Resource
    Electronic Resource
    Polymerization of methacrylic acid and acrylonitrile by p-nitrobenzyl triphenyl phosphonium ylide (1991)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 31 (1991), S. 567-570 
    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: Radical polymerization of methacrylic acid (MAA) and acrylonitrile (AN) in the presence of p-nitrobenzyl triphenyl phosphonium ylide (p-NBTPy) in dimethyl sulphoxide at 65 ± 0.1°C under inert atmosphere was investigated by dilatometry. The ylide failed to initiate the polymerization, but significantly accelerated the rate of polymerization. An interesting feature is that the average polymer molecular weight (M̄v) is a direct function of [p-NBTPy]. The radical polymerization of MAA follows ideal kinetics since calculated monomer and initiator (AIBN) exponents are unity and 0.5, respectively. However, the AN system follows non-ideal kinetics due primarily to radical termination and transfer reactions. The energy of activation, in the presence of p-NBTPy, is low. The accelerating effect of p-NBTPy has been attributed to decreased termination because the ylide did not affect the rate of decomposition of AIBN, as well as form a complex with monomer(s).
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760310806
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  • 10
    Electronic Resource
    Electronic Resource
    Copolymerization of zinc acrylate with acrylonitrile initiated by As2S3-styrene complex (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 34 (1994), S. 105-109 
    Details
    ISSN: 0959-8103
    Keywords: Zinc acrylate ; acrylonitrile ; As2S3-styrene complex ; copolymerization ; dilatometry ; kinetics ; 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: Radical copolymerization of zinc acrylate (ZnA2) with acrylonitrile (AN), initiated by As2S3-styrene complex(I), in dimethyl Sulphoxide (DMSO) at 90 ± 0.1°C for 1.0h under inert atmosphere, yields non-alternating copolymers. The kinetic expression is Rp ∝ [I]0.33 [ZnA2]0.25 [AN]0.44, i.e. the system follows non-ideal kinetics, which is due to primary radical termination as well as degradative chain transfer reactions. The values for activation energy (E) and k2p/kt are 128kJ mol-1 and 8.57 × 10-7 litre mol-1 s-1, respectively. Thermal stability, solubility in different solvents, and IR and NMR spectra have been evaluated.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pi.1994.210340114
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    Paper (German National Licenses)
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