Now showing items 21-30 of 61
Comprehensive force field for multiply-chlorinated hydrocarbons
(Elsevier, 1990)
A force field is presented that has been optimized for chlorinated hyrocarbons containing isolated, vicinal, and geminal secondary chlorines. For carbon--chlorine stretch modes, 74 frequencies in 10 molecules are reproduced ...
Adduct formation identification between phenyl glycidyl ether and 2'-deoxyadenosine and thymidine by chromatography, mass spectrometry and nuclear magnetic resonance spectroscopy
(Elsevier, 1990)
Thymidine 2'-deoxyadenosine were reacted with phenyl glycidyl ether in order to study the formation of the corresponding 2'-deoxynucleoside adducts. Separation methods were elaborated using either reversed-phase high-performance ...
Role of O2- in neutrophil recruitment into sites of dermal and pulmonary vasculitis
(Elsevier, 1990)
Using analogous models of acute dermal vasculities and alveolitis in rats, we have examined the role of oxygen-derived metabolities in the tissue damage associated with neutrophil influx into sites of immune complex ...
Heat capacity of deuterated cubic ammonium hexafluorosilicate (ND4)2SiF6 from 6 K to 343 K
(Elsevier, 1990-05)
The heat capacity of deuterated cubic ammonium hexafluorosilicate (ND4)2SiF6 was measured from 6 K to 343 K by adiabatic calorimetry. The curve of heat capacity against temperature is smooth and without anomalies. Values ...
Synthesis of indolidines by the 1,3-dipolar cycloaddition of azides with methylenecyclopropanes followed by cyclopropyumine rearrangement
(Elsevier, 1990)
Cyclic imines 6a and 6b were obtained by the intramolecular 1,3-dipolar cycloaddition of azides with methylenecyclopropanes. Acid catalyzed rearrangement produced bicyclic (-)-enamines 7, which upon reduction provided ...
The intramolecular cycloaddition of azides with [omega]-chloroalkenes. A facile route to (+/-)-swainsonine and other indolizidine alkaloids
(Elsevier, 1990)
A potentially general route to the 1-azabicyclo[n.m.O]alkane skeleton of various alkaloids is embodied in the intramolecular 1,3-dipolar cycloaddition of aliphatic azides with [omega]-chloroalkenes. Cycloaddition is followed ...
In Vitro release of hypothalamic [beta]-endorphin [beta]E by arginine vasopressin, corticotropin-releasing hormone and 5-hydroxytryptamine: Evidence for release of opioid active and inactive [beta]E forms
(Elsevier, 1990-05)
The aims of the present experiments were: 1) to test whether substances which modulate beta-endorphin-immunoreactive [beta]E-ir release from the pituitary gland might act similarly in hypothalamic tissue; and 2) to further ...
Glucosylceramide synthase of mouse kidney: Further characterization with an improved assay method
(Elsevier, 1990-12)
The synthesis of glucosylceramide from ceramide and UDP-[3H]glucose by mouse kidney homogenates is very sensitive to the concentration of tissue. This was shown to be due to the presence of a UDP-glc pyrophosphatase, which ...
Magnetic-field modulation of a two-electrode direct-current plasma
(Elsevier, 1990)
The magnetic field produced by a pair of electromagnets is used to alter the shape and location of the current channel in a two-electrode direct-current plasma (DCP) designed for solution aerosol analysis. The magnetic ...
Phase II trial of methylglyoxal bis-guanylhydrazone (MGBG) in refractory small cell lung cancer
(Kluwer Academic Publishers; Springer Science+Business Media, 1990-03)
Methylglyoxal bis-guanylhydrazone (MGBG), a potent inhibitor of polyamine synthesis, has demonstrated single agent activity against a number of tumor types including malignant lymphomas and head and neck, esophageal and ...