Now showing items 21-30 of 34
Primary culture of capillary endothelial cells from the spiral ligament and stria vascularis of bovine inner ear
(Springer-Verlag, 1985-09)
Methods for isolation and culture of microvascular endothelial cells of the inner ear were devised to provide an in-vitro system for studying endothelial functions in this tissue. Capillaries from the stria vascularis and ...
A novel S = 3/2 EPR signal associated with native Fe-proteins of nitrogenase
(Elsevier, 1985-09-23)
In addition to their g = 1.94 EPR signal, nitrogenase Fe-proteins from Azotobacter vinelandii, Azotobacter chroococcum and Klebsiella pneumoniae exhibit a weak EPR signal with g [congruent with]5. Temperature dependence ...
On the prosthetic group(s) of component II from nitrogenase : EPR of the Fe-protein from Azotobacter vinelandii
(Elsevier, 1985-07-22)
The EPR spectrum of the reduced Fe-protein from nitrogenase has been reinvestigated. The dependences on temperature, microwave power, and microwave frequency all suggest that the observed signal represents a magnetically ...
Progastrin-like immunoreactivity in porcine antrum: Identification and characterization with region-specific antisera
(Elsevier, 1985-01-16)
In an effort to identify and characterize precursors of gastrin in tissues, we generated region-specific antisera against a synthetic progastrin peptide, Tyr-Gly-Trp-Met-Asp-Phe-Gly-Arg-Arg (GL9), as deduced from the ...
Differential costs of sexual and vegetative reproduction in wild strawberry populations
(Springer-Verlag, 1985-06)
The CO 2 costs of producing sexual and vegetative reproductive propagules were calculated for two species of wild strawberry, Fragaria virginiana and F. vesca . Five populations on sites representing a gradient of successional ...
Studies on the identity of the heme-binding cysteinyl residue in rabbit liver microsomal cytochrome P-450 isozyme 2
(Elsevier, 1985-04-16)
The reaction of purified rabbit liver microsomal P-450 isozyme 2 with 4,4'-dithiobis(2-nitrobenzoate) (DTNB) exhibits first order kinetics and results in the modification of a single thiol, but causes no net loss of the ...
Neuroendocrine regulation of luteinizing hormone and follicle stimulating hormone: A review
(Elsevier, 1985-01-14)
Since the pioneering studies of Everett, Sawyer and Markee (1) it has been generally accepted that the central nervous system (CNS) regulates the secretion of the pituitary gonadotropins, luteinizing hormone (LH) and ...
Bacillus subtilis contains multiple forms of somatostatin-like material
(Elsevier, 1985-03-29)
Extracts of B. subtilis contain somatostatin-like immunoactivity (1-20 pg per g wet weight cells). Two major forms were detected, one with reactivity in both N-and C- terminal immunoassays similar to somatostatin-28 and a ...
Chloroplast DNA and molecular phylogeny
(Wiley Subscription Services, Inc., A Wiley Company, 1985-06)
The small, relatively constant size and conservative evolution of chloroplast DNA (cpDNA) make it an ideal molecule for tracing the evolutionary history of plant species. At lower taxonomic levels, cpDNA variation is easily ...
Reproductive responses to varying food supply in a population of Darwin's finches: Clutch size, growth rates and hatching synchrony
(Springer-Verlag, 1985-06)
I show how food shortage affects reproduction in a population of Darwin's Medium Ground Finches, Geospiza fortis . Despite the common occurrence of starvation and absence of nest predation, hatching is typically nighly ...