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Biochemistry, Biophysics, and Structural Biology Commons

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Articles 1 - 5 of 5

Full-Text Articles in Biochemistry, Biophysics, and Structural Biology

Effect Of Carbon Dioxide On The Molting Activity Of Two Tick Species In The Laboratory, Kenneth H. Holscher, R. W. Barker Sep 1983

Effect Of Carbon Dioxide On The Molting Activity Of Two Tick Species In The Laboratory, Kenneth H. Holscher, R. W. Barker

Entomology Publications

The effects of carbon dioxide concentration on the molting activity of Amblyomma americana (L.), and Amblyomma maculatum Koch were investigated. In both species, replete nymphs held in humidity chambers at a high carbon dioxide concentration (ca. 900 pp,) had a 2-4 day delay in peak ecdysis when compared to nymphs held at a low carbon dioxide concentration (ca. 400 ppm). In contrast, replete larvae showed no apparent delay in peak ecydsis [sic.] as a result of increased carbon dioxide concentration. Percent total eclosion was not affected by carbon dioxide concentration in either nymphs or larvae.


A Study Of The Action Of Bovine Cathepsin D On Intra Muscular Connective Tissue, Elimosaria Elikalia Maeda May 1983

A Study Of The Action Of Bovine Cathepsin D On Intra Muscular Connective Tissue, Elimosaria Elikalia Maeda

All Graduate Theses and Dissertations

Cathepsin D has been postulated to play a role in the tenderization of meat with ageing. Meat toughness has been related to connective tissue content and degree of myofibrillar shortening. This investigation was undertaken to determine the activity of cathepsin Don bovine intramuscular connective tissue.

Highly purified cathepsin D preparations from bovine spleen and bovine sternomandibularis muscle were obtained by ammonium sulfate fractionation followed by affinity chromatography on pepstatin coupled to controlled pore size alkyl amine glass beads . Maximum proteolytic activity using hemoglobin as substrate was obtained at pH 3.5 and 3.8 for bovine spleen and muscle cathepsin ...


Historical Patterns Of Phytoplankton Productivity In Lake Mead, Richard T. Prentki, Larry J. Paulson Jan 1983

Historical Patterns Of Phytoplankton Productivity In Lake Mead, Richard T. Prentki, Larry J. Paulson

Publications (WR)

Lake Mead was impounded in 1935 by the construction of Hoover Dam. The Colorado River was unregulated prior to then and therefore was subjected to extreme variations in flows and suspended sediment loads. Hoover Dam stabilized flows and reduced suspended sediment loads downstream, but Lake Mead still received silt-laden inflows from the upper Colorado River Basin. The Colorado River contributed 97% of the suspended sediment inputs to Lake Mead, and up to 140 x 1O6 metric tons (t) entered the reservoir in years of high runoff. Most of the sediments were deposited in the river channel and formed an ...


Secreted Proteins Induced By Growth Factors And Inhibitors, Marit Nilsen-Hamilton, Richard T. Hamilton Jan 1983

Secreted Proteins Induced By Growth Factors And Inhibitors, Marit Nilsen-Hamilton, Richard T. Hamilton

Biochemistry, Biophysics and Molecular Biology Publications

We have shown that serum, fibroblast growth factor, epidermal growth factor, and the tumour promotor, 12-O-tetradecanoylphorbol- 13-acetate (TPA), selectively induce the synthesis of certain secreted proteins in a variety of cell types. Similarly, a specific growth inhibitor protein selectively induces the synthesis of a secreted protein that is different from those induced by growth factors. In each case, the average increase in labeling by [3%]methionine of these secreted proteins after their induction is 7- to 10-fold. No correspondingly large increase is detected for intracellular proteins.


A Synthesis Of Sleep In Wild Birds, Charles Amlaner, Nigel Ball Dec 1982

A Synthesis Of Sleep In Wild Birds, Charles Amlaner, Nigel Ball

Charles J. Amlaner

No abstract provided.