Now showing items 21-30 of 88
Adrenal cortical 11[beta]-hydroxylase and side-chain cleavage enzymes. requirement for the A- or B-pyridyl ring in metyrapone for inhibition
(Elsevier, 1985-01)
The adrenal cortical enzyme systems, 11[beta]-hydroxylase, P-45011[beta], and the side-chain cleavage complex, P-450 sec, differ only in their cytochrome P-450s. Structural modifications of metyrapone, an inhibitor of ...
Vibrational analysis of peptides, polypeptides, and proteins. XXXII. Α-Poly( L -glutamic acid)
(Wiley Subscription Services, Inc., A Wiley Company, 1985-08)
The Raman and ir spectra of Α-helical poly( L -glutamic acid) have been assigned on the basis of a normal mode calculation for this structure. The force field was based on our previously refined main-chain force constants ...
Synthesis of fused pyrrolines by the intramolecular cycloadition of azides application to the pyrrolizidine alkaloids.
(Elsevier, 1985)
Intramolecular 1,3-dipolar cycloaddition of azide 4 proceeds through triazoline 5 and vinyl aziridine 6, resulting in the formation of the 1,5-homodienyl shift product 7 and the tetrahydropyrrolizines 8 and 9. Compound 8 ...
Laser optogalvanic spectroscopy of molecules: The red electronic system of titanium oxide (TiO)
(Elsevier, 1985-02-08)
The laser optogalvanic (LOG) spectrum of the (0,0) bands of the B 3[Pi] 3[Delta] transition of titanium oxide (TiO) has been observed. The TiO molecules were generated in a glow discharge by sputtering titanium metal and ...
Quantitation of thin-layer chromatograms with an Apple II computer-based videodensitometer
(Elsevier, 1985-11-01)
An inexpensive, high-speed densitometer made from an Apple II computer, a black-and-white video camera, and an image digitizing board is described. By supplementing the computer with a very fast coprocessor, one can obtain ...
Raman and normal mode studies of the polypeptide chain conformations in crystalline magnesium and calcium poly(-glutamate)s
(Elsevier, 1985)
An analysis of the Raman spectra of dry crystalline magnesium and calcium poly(-glutamate)s, based on a normal mode calculation of [alpha]-helical poly(-glutamate), shows that the polypeptide chains in both salts have an ...
Steady state levels of pro-dynorphin-related end products in the striatum and substantia nigra of the adult rhesus monkey
(Elsevier, 1985)
Analysis of an acid extract of the striatum of the rhesus monkey revealed that the molar ratio of dynorphin A(1-8)-sized material and dynorphin (A(1-17)-sized material is approximately 1:1. In addition, the molar ratios ...
Role of alcohol P-450-oxygenase (APO) in microsomal ethanol oxidation
(Elsevier, 1985)
The form of liver microsomal cytochrome P-450 induced by chronic administration of ethanol to rabbits, designated as P-450 or P-450 isozyme 3a, has been purified to homogeneity as judged by several criteria, including NH2- ...
Photodiode array ultraviolet spectrophotometric profiling of carboxylic acids in physiological fluids
(Elsevier, 1985)
In this paper the use of a computer-controlled photodiode array spectrophotometric detector for the high-performance liquid chromatographic (HPLC) profiling of carboxylic acids in physiological fluids is reported. The ...
Thermodynamics of thallium alkanoates I. Heat capacity and thermodynamic functions of thallium(I) n-hexanoate
(Elsevier, 1985-05)
The sub-ambient heat capacity of thallium(I) n-hexanoate is characterized by transitions at 203.5 and 208.3 K which show Cp, m/R maxima of about 400 and 2500 and ([Delta]Sm/R)'s of 1.03 and 1.07. Both appear to be essentially ...