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  • 1
    ISSN: 1434-193X
    Schlagwort(e): Natural products ; Steroids ; Chenodeoxycholic acid ; Brassinosteroid analogues ; Biological activity ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The synthesis and spectroscopic characterization of two new bioactive analogues of brassinosteroids with a 24-hydroxylated cholanic side chain, an A/B ring cis-junction and oxygenated functions in C-7 is described.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    ISSN: 0006-3525
    Schlagwort(e): hepatitis A ; synthetic peptides ; CD ; liposomes ; computational study ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The present study was undertaken to examine the structural features that may be important to explain the immunogenicity of the (110-121) peptide sequence (FWRGDLVFDFQV) of VP3 capsid protein of hepatitis A virus. A conformational analysis of the preferred conformations by CD and molecular mechanics was carried out. Present results suggest that the interaction with liposomes as biomembrane model induces and stabilizes the amphipathic β-structure of the peptide.To study the contribution of amino acid replacements at the RGD tripeptide as well as the influence of the peptide chain length on peptide conformation, solid-phase peptide synthesis of several peptide analogs was carried out and the peptide conformation was studied using CD spectroscopy. The results show that the RGD sequence is necessary to induce the β-structure in the presence of liposomes. © 1998 John Wiley & Sons, Inc. Biopoly 45: 479-492, 1998
    Zusätzliches Material: 9 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 25 (1997), S. 896-903 
    ISSN: 0142-2421
    Schlagwort(e): titanium silicide ; Schottky barrier ; silicidation ; rapid thermal annealing ; interface ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: The silicidation process of titanium on silicon shows three distinct ranges depending on the treatment temperature. From 700°C up to 900°C, a stable and reproducible TiSi2 C54/Si structure is formed for all treatment conditions. At lower temperatures the silicidation process is not complete, and several silicide phases appear during the thermal treatment. On the other hand, the silicidation at high temperatures (T〉900°C) provokes changes in the TiSi2/Si structures. We have centred our interest in these two extreme ranges of temperature. The degree of silicidation has been established by Rutherford backscattering and grazing-incidence x-ray diffraction. It has been observed that TiSi and TiSi2 C54 are the only silicide phases present in the film at low temperatures. The distribution of phases has been determined by transmission electron microscopy. The high-resolution electron microscopy images indicate that the silicide/silicon interface is very flat, but the interface between the different phases of the silicide is not well defined. High-resolution electron microscopy and I-V measurements have been used to characterize the interface formed between the silicide and the silicon at high temperatures. At 1050°C the interface is flat in a scale of nanometres but it is rough in a scale micrometres. This roughening is not high enough to explain the decreasing of the Schottky barrier height. © 1997 John Wiley & Sons, Ltd.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Publikationsdatum: 2021-05-19
    Beschreibung: El objetivo de la investigación es estimar la biomasa y abundancia del recurso camarón nailon, en el litoral comprendido entre la II y la VIII regiones, a través de una evaluación directa con el método de área barrida.
    Beschreibung: The aim of researcher is to estimate the biomass and abundance of shrimps resort on the coast between the regions II and VIII, through direct assessment with the swept area method.
    Beschreibung: Unpublished
    Schlagwort(e): Benthic environment ; Phytoplankton ; Biomass ; Bathymetric data ; Trap fishing ; Landing statistics ; Recruitment ; Spawning ; Stock assessment ; Trawling ; Longlining ; Age determination ; Size-at-age ; Length-weight relationships ; Salinity
    Repository-Name: AquaDocs
    Materialart: Report , Non-Refereed , Article
    Format: 275pp.
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Publikationsdatum: 2021-05-19
    Beschreibung: Las Áreas de Manejo constituyen una medida de administración pesquera que tienen su fundamento en la entrega, a usuarios definidos, del uso exclusivo de los recursos bentónicos presentes en un área determinada. La designación de áreas disponibles para llevar a efectos proyectos de manejo y explotación de recursos bentónicos, se ha efectuado sobre la base de áreas seleccionadas y propuestas por las propias organizacion. es de pescadores en cada Región, considerando principalmente antecedentes histór icos de productividad de las mismas
    Beschreibung: Management Areas are a measure of fisheries management that are based on delivery to defined users, the exclusive use of benthic resources in a given area. The designation of areas available to take effects project management and exploitation of benthic resources, has been made on the basis of selected areas and proposed by the organizations of fishermen in each region, especially considering historical antecedents productivity there of.
    Beschreibung: Unpublished
    Schlagwort(e): Biomass ; Age determination ; Size-at-age ; Landing statistics ; Stock assessment ; Concholepas concholepas ; Fisurella latimarginata
    Repository-Name: AquaDocs
    Materialart: Report , Non Refereed
    Format: 2t.
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Publikationsdatum: 2021-05-19
    Beschreibung: El objetivo de la investigación es estimar la biomasa y abundancia del recurso camarón nailon, en el litoral comprendido entre la II y la VIII regiones, a través de una evaluación directa con el método de área barrida.
    Beschreibung: The aim of researcher is to estimate the biomass and abund ance of shrimps resort on the coast between the regions II and VIII, through direct assessment with the swept area method.
    Beschreibung: Unpublished
    Schlagwort(e): Benthic environment ; Phytoplankton ; Biomass ; Bathymetric data ; Trap fishing ; Landing statistics ; Recruitment ; Spawning ; Stock assessment ; Trawling ; Longlining ; Age determination ; Size-at-age ; Length-weight relationships ; Salinity
    Repository-Name: AquaDocs
    Materialart: Report , Non-Refereed , Article
    Format: 275pp.
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    New York, NY : Wiley-Blackwell
    Journal of Chemometrics 6 (1992), S. 231-246 
    ISSN: 0886-9383
    Schlagwort(e): Integration methods ; Taylor series method ; Optimization methods ; Kinetic mechanisms ; Kinetic determinations ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: A general equation to derive kinetic models up to any order is given. This equation greatly facilitates the application of the Taylor series method to the integration of kinetic models up to very high orders. When dealing with non-stiff models, computing time is always reduced by increasing the integration order, at least up to the 20th order. When the model is stiff, the integration order should be optimized; however, a twelfth order is recommended to integrate weakly stiff models. The use of an algorithm which permits the immediate calculation of the integration step size required to maintain a given accuracy leads to further reductions in computing time. When implemented as recommended here, a high-order Taylor series method is more rapid and accurate than Runge-Kutta and predictor-corrector methods and can be advantageously used in combination with optimization methods to perform mechanism studies and in multicomponent kinetic determinations.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 11 (1998), S. 584-588 
    ISSN: 0894-3230
    Schlagwort(e): N-methyl-N-nitroso-p-toluenesulphonamide ; hydrolysis ; micellar media ; pseudophase model ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: The acid and basic hydrolysis of N-methyl-N-nitroso-p-toluenesulphonamide (MNTS) was studied in different micellar aggregates (CTACl, CTABr, TTABr, LTABr, and OTACl). The effect of mixed micelles (OTAX-LTAX) was also studied. The kinetic behaviour was explained on the basis of the pseudophase model, from which the binding constants of MNTS to different micelles, the ion exchange constants and the reactivity constants in the micellar pseudophase were obtained. © 1998 John Wiley & Sons, Ltd.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    ISSN: 0899-0042
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: An enantioselective assay has been developed for the determination of the enantiomers of ketorolac and its metabolite p-hydroxyketorolac in plasma and urine. The analytical method utilizes a coupled achiral-chiral HPLC system where the initial separation of ketorolac from p-hydroxyketorolac and matrix interferences was achieved on a C18-stationary phase and the enantioselective separations of the two target solutes were accomplished on a human serum albumin-based chiral stationary phase. The two columns were attached in sequence and the assay was carried out without the necessity of column-switching techniques. The method has been validated for use in pharmacokinetic and metabolic studies and represents the initial report of the determination of ketorolac and p-hydroxyketorolac enantiomers in urine. The results of the study indicate that after the administration of racemic ketorolac there was an enantioselective distribution of ketorolac enantiomers in plasma [(R)-ketorolac: (S)-ketorolac = 3.89 ± 0.93 (n = 6) and urine (R)-ketorolac: (S)-ketorolac = 1.26 ± 0.09 (n = 7)]. The mean ratio of the p-hydroxyketorolac enantiomers was 1.77 ± 0.46 (n = 7). Both ketorolac and p-hydroxyketorolac are glucuronized in the acyl carboxyl moiety and the results of this study indicate that this process is not enantiospecific. © 1994 Wiley-Liss, Inc.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 12 (1989), S. 419-421 
    ISSN: 0935-6304
    Schlagwort(e): High Performance Thin Layer Chromatography, HPTLC ; Pentachlorophenol ; Urine, wooden containers ; HPTLC, PCP ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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