Structural characterization

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  • A water soluble glucan isolated from hot aqueous extract of fruit bodies of an edible hybrid mushroom Pfle1r of Pleurotus florida and Lentinula edodes showed macrophages, splenocytes, and thymocytes activation. The glucan consists of terminal, (1→3,6)-linked, and (1→6)-linked β-D-glucopyranosyl moieties in a molar ratio of nearly 1:1:3. On the basis of acid hydrolysis, methylation, periodate oxidation study, and NMR studies (1H, 13C, DEPT-135, TOCSY, DQF-COSY, NOESY, ROESY, HSQC, and HMBC), the structure of the repeating unit of the glucan was established as:...

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  • Structural Characterization of Crystalline and Non-crystalline Materials – A Brief Background of Current Requirements The X-ray powder diffraction technique is a well-established and widely used method for both qualitative and quantitative analysis of various substances in a variety of states (see, for example, [1]). However, in a multi-component mixture with a relatively complicated chemical composition, we frequently find difficulty in identifying the individual chemical constituents by the conventional X-ray powder diffraction method.

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  • Extrusion processing is widely utilized in the food and feed industries for the manufacture of value-added products. Extrusion processing is a versatile technology producing a wide range of products, including confectionery products, pasta, ready-to-eat (RTE) cereals, flat bread, snack products, texturized proteins, and pet foods.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Structural Characterization of Mesoporous Silica Nanofibers Synthesized Within Porous Alumina Membranes

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Nanoscale structural characterization of epitaxial graphene grown on off-axis 4H-SiC (0001)

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Near-surface processing on AlGaN/GaN heterostructures: a nanoscale electrical and structural characterization

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  • During pathogenesis of transmissible spongiform encephalopathies (TSEs) an abnormal form (PrP Sc ) of the host encoded prion protein (PrP C ) accu-mulates in insoluble fibrils and plaques. The two forms of PrP appear to have identical covalent structures, but differ in secondary and tertiary structure.

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  • We report here the characterization of the first mammalian-like purine nucleoside phosphorylase from the hyperthermophilic archaeonPyrococcus furiosus (PfPNP). The gene PF0853 encoding PfPNP was cloned and expressed in Escherichia coliand the recombinant protein was purified to homogeneity.

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  • The HIV-1 encoded virus protein U (VpU) is required for efficient viral release from human host cells and for induction of CD4 degradation in the endoplasmic reticulum. The cytoplasmic domain of the membrane protein VpU (VpUcyt) is essential for the latter activity. The structure and dynam-ics of VpUcyt were characterized in the presence of membrane simulating dodecylphosphatidylcholine (DPC) micelles by high-resolution liquid state NMR.

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  • l-Glutamate oxidase (LGOX) from Streptomycessp. X-119-6, which cata-lyzes the oxidative deamination of l-glutamate, has attracted increasing attention as a component of amperometricl-glutamate sensors used in the food industry and clinical biochemistry. The precursor of LGOX, which has a homodimeric structure, is less active than the mature enzyme with an a2b2c2 structure;

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  • A sialylated lacto-N-neotetraose (Sial-lNnT) structural unit was identified and structurally characterized in the lipo-polysaccharide (LPS) from the genome-sequenced strain Road (RM118) of the human pathogenHaemophilus influ-enzaegrown in the presence of sialic acid. A combination of molecular genetics, MS and NMR spectroscopy techniques showed that this structural unit extended from the proximal heptose residue of the inner core regionof theLPSmolecule.

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  • One of the greatest challenges faced by the food scientist is man himself with his highly sensitive oral equipment for evaluating food texture. The recognition of this challenge leads immediately to two questions: ‘How can we characterize the texture of foodstuffs in a manner that will reflect human perceptions?’ and, then, ‘How may we preserve, formulate and process products in a way that will be acceptable to the consumer?’

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  • The book "Polycrystalline Materials - Theoretical and Practical Aspects" is focused on contemporary investigations of plastic deformation, strength and grain-scale approaches, methods of synthesis, structurals, properties, and application of some polycrystalline materials. It is intended for students, post-graduate students, and scientists in the field of polycrystalline materials.

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  • The water soluble crude polysaccharide obtained from cultured mycelia of Cordyceps militaris (CPM) by hot water extraction followed by ethanol precipitation was fractionated by DEAE cellulose and Sepharose CL-6B column chromatography. This fractionation process resulted in four polysaccharide fractions that were termed CPMN Fr I, CPMN Fr II, CPMN Fr III, and CPMN Fr IV. Of these fractions, CPMN Fr III was able to upregulate the functional events mediated by activated macrophages, such as production of nitric oxide (NO) and expression of cytokines (IL-1b and TNF-a).

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  • The goal of this work is to give a precise numerical description of the K¨hler cone of a compact K¨hler manifold. Our main result states that the a a K¨hler cone depends only on the intersection form of the cohomology ring, the a Hodge structure and the homology classes of analytic cycles: if X is a compact K¨hler manifold, the K¨hler cone K of X is one of the connected components of a a the set P of real (1, 1)-cohomology classes {α} which are numerically positive on analytic cycles, i.e. Y αp 0 for every irreducible analytic...

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  • Malate dehydrogenase (MDH) may be important in car-bohydrate and energymetabolism inmalarial parasites. The cDNA corresponding to the MDHgene, identified on chromosome 6 of thePlasmodium falciparumgenome, was amplified by RT-PCR, cloned and overexpressed in Escherichia coli. The recombinant PfMDH was purified to homogeneity and biochemically characterized as an NAD + (H)-specific MDH, which catalysed reversible inter-conversion of malate to oxaloacetate.

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  • Shape memory alloys have become in the past decades a well established research subject. However, the complex relations between properties and structure have created a continuously growing interest for a deeper insight all this time. The complexity of relationships between structure and properties is mostly related to the fact that strong ?multidimensional? interactions are taking place: from the early studies focusing on the thermal and/or mechanical induced phase transformations to the more recent findings on the magnetically induced structural changes.

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  • This book provides an overview of the synthesis and characterization of nanocrystals. Nanocrystals, owing to their unique behavior with reduction in size, have been a significant part of the novel materials developed for applications such as biosensors, optics, catalysts to semiconductor devices. Over the years, various synthesis methods are discovered to develop nanostructures with tunable properties such as optical, electronic magnetic and mechanical properties. The chapters in this book cover a broad range of properties of nanocrystals synthesized for various applications....

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  • Primary structural information including the complete nucleotide sequence of the ®rst insect aldehyde oxidase (AO) was obtained from the common house mosquitoCulex quinquefasciatus(Say) through cloning and sequencing of both genomic DNA and cDNA. The deduced amino-acid sequence encodes a 150-kDa protein of 1266 amino-acid residues, which is consistent with the expected monomeric subunit size of AO.

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  • Dipeptidyl-peptidase III (DPP III) hydrolyses small peptides with a broad substrate specificity. It is thought to be involved in a major degradation pathway of the insect neuropeptide proctolin. We report the purification and characterization of a soluble DPP III from 40 gDrosophila melanogas-ter.

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