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Digitale Medien

Intracellular concentration of elements in normal and dystrophic skeletal muscles of the chicken (1980)

Misra, L. K. ; Smith, N. K. R. ; Chang, D. C. ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Journal of Cellular Physiology 103 (1980), S. 193-200

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ISSN: 0021-9541

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: In this study, the intracellular concentrations of six elements (mmole/kg dry weight) were directly measured in the muscle fibers of pectoralis major muscles of eight week old, genetically dystrophic and normal chickens by the X-ray microanalysis technique. The extent of muscle degeneration was evaluated by morphometric measurements of muscle fiber diameter and other histological changes. A significant increase in the concentration of intracellular sodium and chlorine was evident in dystrophic muscles. The concentration of intracellular sodium was 127.0 ± 35.0 in the muscle fibers of dystrophic chicks compared to 65.7 ± 16.5 in normal controls. The concentration of chlorine was 90.5 ± 27.5 and 54.1 ± 5.5 in the muscle fibers of dystrophic and normal chicks respectively. The intracellular concentrations of potassium, magnesium, phosphorous, and sulfur remained unchanged in the dystrophic condition. Morphometric studies revealed that the dystrophic pectoralis muscles contain fewer but thicker fibers per unit area compared to normal pectoralis muscles. The importance of these findings are discussed in relation to the results of earlier investigations.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jcp.1041030204

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2

Digitale Medien

Synthesis of fibre-forming copolymers of acrylonitrile with acrylates in systems based on lithium alkoxides (1984)

Artamonova, I. L. ; Novoselova, A. ; Vinogradova, S. I. ; [weitere]

Weinheim : Wiley-Blackwell

Acta Polymerica 35 (1984), S. 65-67

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ISSN: 0323-7648

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Physik

Beschreibung / Inhaltsverzeichnis: Die Copolymerisation von Acrylnitril und Acrylaten wurde in Dimethylformamid bei hohem Acrylnitril/Acrylat-Verhältnis im Temperaturbereich von -50 bis +10°C durch Lithiumalkoxide initiiert. Die Bedingungen zur direkten Präparation von Spinnlösungen der Copolymere wurden erarbeitet. Das Lösungsspinnen dieser Copolymere durch Orientierungsfällung ergab Fasern mit hohen Festigkeitswerten.

Notizen: The copolymerization of acrylonitrile with acrylates has been initiated by lithium alkoxides in dimethylformamide at a high acrylonitrile/acrylate ratio over the temperature range from -50 to 10°C. The conditions for a direct preparation of spinning solutions of the copolymers were determined. The solution-spinning of these copolymers by orientational precipitation yielded fibres exhibiting high strength properties.

Zusätzliches Material: 3 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/actp.1984.010350115

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3

Digitale Medien

Effects of millimeter-wave radiation on monolayer cell cultures. II. Scanning and transmission electron microscopy (1981)

Stensaas, L. J. ; Partlow, L. M. ; Bush, L. G. ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Bioelectromagnetics 2 (1981), S. 141-150

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ISSN: 0197-8462

Schlagwort(e): millimeter-wave radiation ; BHK-21/C13 cells in monolayer culture ; scanning electron microscopy ; transmission electron microscopy ; Life and Medical Sciences ; Occupational Health and Environmental Toxicology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Physik

Notizen: Both thermal and athermal effects of millimeter-wave radiation on BHK-21/C13 cells were sought using scanning and transmission electron microscopy in conjunction with an in vitro technique that allows direct exposure of monolayer cultures to high average power densities. Culture dishes were irradiated by placing them on the open end of an E- or U-band wave guide. This technique exposes different regions of the cell monolayer lying along the longer axis of the wave guide aperture to varying power densities ranging from zero at each edge to twice the average power density at the center.Cell ultrastructure was unaffected by microwave radiation for 1 hour (41.8 or 74.0 GHz, average power densitites = 320 or 450 mW/cm2, respectively) with or without cooling by rapid recirculation of the culture medium. Temperature in recirculated cultures was held at 37.2 °C, and that in noncooled cultures never exceeded 42 °C during irradiation at either power density. In contrast, cell morphology was affected by microwave exposure whenever irradiation conditions were altered so that the temperature of the monolayer reached or exceeded 44.5 °C. Ultrastructural alterations included breakage of cell processes, progressive detachment of cells from the substrate, increased clumping of heterochromatin in the nuclei, and the appearance of large empty vesicles in the cytoplasm. Such morphological changes resulted from either application of higher average power densities or irradiation at the power densities described above at a higher ambient temperature (〉38.5°C).

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bem.2250020205

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4

Unbekannt

Trace chemistries of fire: a source of chlorinated dioxins (1980)

R. R. Bumb ; W. B. Crummett ; S. S. Cutie ; [weitere]

American Association for the Advancement of Science (AAAS)

In: Science. 210(4468): 385-90.

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Publikationsdatum: 1980-10-01

Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bumb, R R -- Crummett, W B -- Cutie, S S -- Gledhill, J R -- Hummel, R H -- Kagel, R O -- Lamparski, L L -- Luoma, E V -- Miller, D L -- Nestrick, T J -- Shadoff, L A -- Stehl, R H -- Woods, J S -- New York, N.Y. -- Science. 1980 Oct;210(4468):385-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6159682" target="_blank"〉PubMed〈/a〉

Schlagwort(e): Air Pollutants/analysis ; Chemical Phenomena ; Chemistry ; Chromatography, High Pressure Liquid ; *Dioxins/analysis ; *Fires ; Power Plants ; Smoke/analysis ; Soil Pollutants/analysis ; Tetrachlorodibenzodioxin/analysis ; Vehicle Emissions/analysis ; Water Pollutants, Chemical/analysis

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von American Association for the Advancement of Science (AAAS)

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Digitale Medien

High Performance Liquid Chromatography (HPLC.) of Natural Products. III [1]. Isolation of New Tripeptides from the Fermentation Broth of P. Chrysogenum1. Mitt.: [1], 2. Mitt.: [2]. (1980)

Neuss, N. ; Miller, R. D. ; Affolder, C. A. ; [weitere]

New York, NY : Wiley-Blackwell

Helvetica Chimica Acta 63 (1980), S. 1119-1129

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ISSN: 0018-019X

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: α-Aminoadipoyl-alanyl-valine, α-aminoadipoyl-serinyl-valine and α-aminoadipoyl-serinyl-isodehydrovaline have been isolated from the fermentation broth of P. chrysogenum. The configuration of α-aminoadipoyl-serinyl-valine has been shown to be L, L, D.

Zusätzliches Material: 11 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/hlca.19800630503

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6

Digitale Medien

Kinetics of epoxy resin synthesis on the basis of GPC measurements (1981)

Antal, L. ; Füzes, L. ; Samay, G. ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 26 (1981), S. 2783-2786

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ISSN: 0021-8995

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/app.1981.070260827

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7

Digitale Medien

Automated fermentation equipment I. program-controlled fermentor (1981)

Veres, A. ; Nyeste, L. ; Kurucz, I. ; [weitere]

New York, NY [u.a.] : Wiley-Blackwell

Biotechnology and Bioengineering 23 (1981), S. 391-404

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ISSN: 0006-3592

Schlagwort(e): Chemistry ; Biochemistry and Biotechnology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung

Notizen: A fermentation system with a plug scheme unit has been developed, offering a variety of solutions to measurement, control, and operational problems. By means of the program unit, e.g., automatic pH control assigned to the dynamic of batch cultures and the feed of different ingredients controlled by a time program or a given variable have been solved. The continuous culture volume was controlled by a level controlled by a level controller equipped with a photosensor. A method was developed for variable control that provide information on the activity of the culture, and allows direct measurement of the different rate values, e.g., generation time or specific product formation rate. Applicability of the direct measurement of generation time is presented in the qualification of molasses and in a static off-line optimization process.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/bit.260230213

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8

Digitale Medien

Sealing technique for static coating of large bore capillary columns (1981)

Peters, T. L. ; Nestrick, T. J. ; Lamparski, L. L.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 4 (1981), S. 588-588

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ISSN: 0935-6304

Schlagwort(e): Capillary columns ; End sealing ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240041113

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9

Digitale Medien

Storage hardening and “abnormal” groups in guayule rubberThis article was presented at the 27th IUPAC Congress, Helsinki, Finland, August 1979. (1981)

Angulo-Sanchez, J. L. ; Jimenez-Valdez, L. L. ; Campos-Lopez, E.

New York, NY [u.a.] : Wiley-Blackwell

Journal of Applied Polymer Science 26 (1981), S. 1511-1517

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ISSN: 0021-8995

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: The hardening process of natural (Hevea brasiliensis) rubber, that takes place when this rubber is stored in dry conditions over long periods of time, has been correlated with the presence of reactive “abnormal” groups directly grafted on the polymeric chain and in the serum of the latex. In the present work, natural Hevea (HR) and Guayule (Parthenium argentatum) rubber (GR) were stored under accelerated conditions and the changes in Mooney viscosity and molecular weight measured. The results showed that while HR undergoes hardening, GR keeps its Mooney viscosity constant, as does a constant viscosity (CV) Hevea rubber. These results are explained by the absence of functional “abnormal” groups that sustain the hardening reactions.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/app.1981.070260508

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10

Digitale Medien

Effect of fibronectin on the adhesion of an established cell line to a surface reactive biomaterial (1982)

Seitz, T. L. ; Noonan, K. D. ; Hench, L. L. ; [weitere]

Hoboken, NJ : Wiley-Blackwell

Journal of Biomedical Materials Research 16 (1982), S. 195-207

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ISSN: 0021-9304

Schlagwort(e): Chemistry ; Polymer and Materials Science

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Medizin , Technik allgemein

Notizen: We have demonstrated that an established hamster cell line (NIL 8 M-2) will adhere to the bioceramic bioglass. The rate at which the NIL 8 M-2 cells assume a spread morphology on bioglass is density dependent and the morphology displayed by NIL 8 M-2 cells attached to bioglass is much more elongated than that displayed by NIL 8 M-2 cells attached to nonreactive glass. Precoating the bioglass with the plasma form of human fibronectin significantly reduces the density dependent nature of cell spreading. Coating the bioglass with fibronectin also reduces the time required for cell spreading and changes the morphology of the attached cells from an elongated to an extremely flattened shape. Our work raises the possibility that bone-implant adhesion might be improved by introducing molecules relevant to cell-substrate attachment into the biomaterial prior to implantation.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jbm.820160303

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