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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 3045-3055 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Concepts from the theory of interacting continua are employed to develop constitutive relations for liquid and/or gas saturated elastic porous media. The model is formulated by defining intrinsic stress tensors and densities in terms of the partial stress tensors, partial densities, and actual volume fractions occupied by each component. It is assumed that the constitutive law for each component as a single continuum relates intrinsic pressure to intrinsic deformation. Relative motion between the constituents is allowed through simple Darcy-type expressions. The governing equations together with the constitutive relations are used to investigate the propagation of both harmonic and transient pulses. In general three modes of wave propagation exist. In the case of a transient pulse, these modes lead to a three-wave structure. Laplace transform techniques are used to derive closed-form solutions for transient loading for two limiting values of viscous coupling (i.e., weak viscous coupling, strong viscous coupling). Strong viscous coupling results in the coalescence of the three wave fronts into a single front. Solutions for the general case of transient loading are obtained by numerical inversion of the Laplace transforms.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 30 (1987), S. 0 
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The effects of pinealectomy on testicular activity and secretory activity of seminal vesicles were examined in the catfish Heteropneustes fossilis under various combinations of photoperiod and temperature during different periods of the annual reproductive cycle. Pinealectomy had no effect on gonadal activity during the preparatory, prespawning and spawning periods of the reproductive cycle. However, during the postspawning period, under long (LD 14:10) or short (LD 9:15) photoperiod at 25° C or at gradually increasing ambient temperature, pinealectomy accelerated testicular recrudescence and secretory activity of the seminal vesicles. Nevertheless. during this period the presence of the pineal facilitated the recrudescence of testes and seminal vesicles in catfish exposed to continuous light (LL), continuous darkness (DD) and 12 hL:l2 hD (LD) at 25° C. These findings suggest that the role of the pineal in catfish reproduction is variable and depends upon the photoperiod and temperature regimes to which the fish are exposed, as well as on the time of the year and the state of the reproductive cycle. The results also suggest that the effects of pinealectomy in catfish are mediated through an influence on the hypothalamo-hypophyseal gonadal axis.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of pineal research 5 (1988), S. 0 
    ISSN: 1600-079X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: To investigate the relative importance of pineal and eyes in ovarian activity, catfish subjected to pinealectomy, blinding, or both were exposed to continuous light (LL) or continuous darkness (DD) during the different phases of the annual reproductive cycle. Pineal or eyes have no influence on ovarian activity during the preparatory, prespawning, and spawning periods of the annual reproductive cycle under these photoregimes. However, the pineal accelerated ovarian activity under LL and DD during the postspawning period. Blinding alone has no effect on ovarian recrudescence under these regimes. However, combined surgery (blinded-pinealectomy) inhibited ovarian development under both these conditions, indicating that the pineal organ is more important than the eyes. Ovarian recrudescence occurred even in the absence of both pineal and eyes, indicating the involvement of extrapineal and extraocular photoreception in the regulation of reproductive activity in the catfish.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Tropical animal health and production 21 (1989), S. 233-235 
    ISSN: 1573-7438
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'épreuve de la coagglutination a été standardisée en utlisant une souche Cowan I deStaphylococcus aureus (contenant la protéine A) recouverte avec du sérum variolique anti-caprin pour la détection de l'antigène caprivariolique à partir d'une peau de chèvre infectée, ou d'un antigène provenant d'une culture cellulaire de rein de chevreau. L'agglutination a pu être observée en moins de 10 secondes dans la dilution virale allant jusqu'à 10. Etant donné sa facilité de mise en oeuvre, le test peut être utilisé pour un diagnostic rapide de la variole caprine.
    Abstract: Resumen Se estandarizó la prueba de coaglutinación usando la cepa Cowan I (conteniendo proteína A) deStaphylococcus aureus, cubierto con suero antiviruela caprina, para la detección de antígeno de viruela caprina de la piel infectada o cultivos antigénicos de rinón de cabritillo. Se observó aglutinación a los 10 segundos en dilución de virus hasta 10-6. Como la prueba es fácil de llevar a cabo, ésta puede usarse para el diagnóstico rápido de viruela caprina.
    Notes: Summary The coagglutination test was standardised usingStaphylococcus aureus strain Cowan I (containing Protein A) coated with anti-goat pox serum for the detection of goat pox antigen of infected goat skin or kid kidney cell culture antigen. Agglutination was observed within 10 seconds in virus dilutions up to 10−6. As the test is easy to perform it can be used for rapid diagnosis of goat pox.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    World journal of microbiology and biotechnology 5 (1989), S. 297-305 
    ISSN: 1573-0972
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: Résumé La température d'incubation, la taille de l'inoculum, le pH initial et le contrôle du pH jouent un rôle majeur dans la conversion de l'amidon de manioc en glucose parRhizopus oligosporus. On obtient la production maximum de glucose après 45–48 h de fermentation à 45°C, avec un contrôle de pH à 4.0, 5% d'amidon de manioc, une vitesse d'agitation de 300 tpm et une vitesse d'aération de 85 ml/min. Dans ces conditions, l'hydrolyse de l'amidon atteint 99.4% avec une efficacité de conversion de l'amidon en glucose de 91.6% et un rendement final de 35.2 g de glucose par litre pour un rendement en biomasse de 2.8 g seulement par 100 g d'amidon de manioc.
    Notes: Summary Incubation temperature, inoculum size, initial pH and pH control play a major role in cassava starch to glucose conversion byRhizopus oligosporus. Maximal glucose production was obtained after 45 to 48 h fermentation at 45°C, pH control at 4.0, 5% cassava starch, agitation rate of 300 rev./min. and aeration rate of 85 ml/min. Under these conditions, starch hydrolysis was 99.4% with a starch-to-glucose conversion efficiency of 91.6% and a final yield of 35.2 g/l glucose with a biomass yield of only 2.8 g/100 g cassava starch.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 33 (1989), S. 948-954 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Direct saccharification of 2.64% cassava starch by Rhizopus oligosporus 145F was attempted under various cultural conditions. Maximum glucose yield of 18.0 g/L culture filtrate was obtained with an initial pH 3.8, 2% (v/v) inoculum of R. oligosporus spores, and an incubation temperature of 45°C in shake flask cultures for 48 h. This concomitantly produced 2.7 g mycelia/100g cassava starch containing 20.2% true protein. The production of glucose and mycelia was accomplished with 92.8% starch saccharification having 67.9% starch to glucose conversion efficiency.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Veterinary research communications 13 (1989), S. 331-337 
    ISSN: 1573-7446
    Keywords: blood ; buffalo ; chemotherapy ; gentamicin ; pharmacokinetics ; urine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The disposition kinetics and urinary excretion of gentamicin sulphate were studied in young buffalo bulls following a single intramuscular administration of the drug at 5 mg kg-1 body weight. The time course of the serum gentamicin concentration was adequately described by the one-compartment open model. The values of the absorption and elimination halflives were 12.2±2.2 and 167.0±29.7 min respectively. The apparent volume of distribution was 0.29±0.01 L kg-1. During the first 12 h, 63% of the total administered dose was excreted in urine. On the basis of the kinetic data, a satisfactory intramuscular dosage regimen for gentamicin sulphate would be at least 6 mg kg-1 body weight repeated at 8 h intervals.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0148-7280
    Keywords: oocyte maturation ; cyclic AMP ; fish ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The changes in cAMP were followed in trout oocytes incubated in vitro after defolliculation performed by either enzymatic or manual dissection. Both defolliculation methods induced a highly significant rise in oocyte cAMP level (4.5 times the basal level of control [follicle-enclosed oocytes], after 6 h). Treatment of defolliculated oocytes with 17α-hydroxy,20β-dihydroprogesterone (17α,20β-OH-P) (10-6 M), which induced oocyte maturation (germinal vesicle breakdown [GVBD]) was able, first, to interrupt the increase of oocyte cAMP level promoted by defolliculation and then to lower this level significantly down to values that still remained higher than folliculated controls. Very low concentrations of 17α,20β-OH-P (1.38-55.6 10-9 M), or physiological doses of testosterone (0.35 10-6 M, in the range found in vivo before ovulation) were able to induce a similar decrease of oocyte cAMP level without inducing GVBD. Under the same experimental conditions estradiol (0.35 10-6 M) exhibited no action. These results suggest that some factor(s) originating in the follicle (FIF), inhibit the oocytes' tendency to accumulate cAMP before the final surge of 17α,20β-OH-P. This factor might be a follicular steroid such as testosterone or nonmaturing concentrations of 17α,20β-OH-P. Moreover our data favour the hypothesis that the final surge of 17α,20β-OH-P could induce distinct intraoocyte mechanisms: the first induces an irreversible blockage of cAMP level before the inhibitory action of the FIF is suppressed by ovulation, and the second mechanism leads to GVBD.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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