The 3α Faddeev equation using 2α RGM kernel involves redundant components whose contribution to the total wave function completely cancels out. We propose a practical method to solve this Faddeev equation, by eliminating the admixture of such redundant components. A complete equivalence between the present Faddeev approach and a variational approach using the translationally invariant harmonic-...

Ultraviolet and heat-curable polyurethane acrylate prepolymers were synthesized from 4,4’-diphenyl methane diisocyanate, polyethylene adipate diol, polyhexamethylene carbonate diol, polycaprolactone diol and 1,6hexamethylene diamine , acrylic acid. Effects of nature of the soft segments on the physical properties were investigated. It was found that the thermal stability increased from polycarb...

Three new ursane-type triterpenoids, 3α,6α,30-trihydroxy-ursan-28-oic acid (1), 3α,30-dihydroxy-6-oxo-ursan-28-oic acid (2) and 3α,6α,7α,30-tetrahydroxy-ursan-28-oic acid (3), together with one known triterpenoid, betulinic acid (4), one known anthraquinone, 1,7-dihydroxy-2-methylanthraquinone (5), four known phenols, 1,3,5-trimethoxybenzene (6), p-hydroxybenzoic acid (7), syringic acid (8), is...

The stereochemistry of diol epoxide formation in mouse epidermis upon topical applicationof [3H]-l/f,2A-dihydroxy-l,2-dihydro-5-methylchrysene (|3H|-5-MeC-l/f,2A-diol)and |3Hl-6-MeC-lÄ,2Ä-diol, and the tumorigenicityin mouse skin and in newborn mice of the R,S,S,R and S,R,K,S enantiomers of l,2-dihydroxy-3,4-epoxy-l,2,3,4-tetrahydro-5methylchrysene (5-MeC-l,2-diol-3,4-epoxide), 5-MeC-7,8-diol...

Phytochemical investigation of the 80% ethanol extract of the bulbs of Lycoris radiata resulted in the isolation of five new Amaryllidaceae alkaloids: (+)-5,6-dehydrolycorine (1), (+)-3α,6β-diacetyl-bulbispermine (2), (+)-3α-hydroxy-6β-acetyl- bulbispermine (3), (+)-8,9-methylenedioxylhomolycorine-N-oxide (5), and 5,6-dihydro-5- methyl-2-hydroxyphenanthridine (7), together with two known compo...

Molting hormone (ecdysteroid) is one of the most important hormones in insects. The synthesis and inactivation of the ecdysteroid regulate the developmental process of insects. A major pathway of ecdysone inactivation is that ecdysone is converted to 3-dehydroecdysone, and then further to 3-epiecdysone in insects. Two enzymes (ecdysone oxidase: EO and 3DE-3α-reductase) participate in this pathw...

The present study describes the effect of NCO/OH and triol/diol ratios on the mechanical properties of Nitro functionalized Hydroxyl-terminated polybutadiene (Nitro-HTPB) elastomers. The progress of the cure reaction of Nitro-HTPB and toluene diisocyanate (TDI) is evaluated by following up the variations in the IR absorption bands of the NCO stretching and the CO ...

The metabolism of (+/-)-trans-7,8-dihydroxy-7,8-dihydrobenzo(a)pyrene (BP-7,8-diol) by prostaglandin synthetase and cytochrome P-450-dependent monooxygenases was studied using enriched fractions of Clara cells and alveolar type II cells from rat lung. Arachidonic acid-fortified fractions enriched in Clara cells and alveolar type II cells metabolized BP-7,8-diol to the 7,10/8,9-tetrol of benzo(a...

In virgin female rats, atrial distension (an index of blood volume expansion) causes an increase in c- fos expression in the paraventricular nucleus of the lateral hypothalamus. During pregnancy, this response is markedly attenuated. We tested the effects of 3α-hydroxy-5α-pregnan-20-one (3α-OH-DHP) on activation of central pathways following stimulation of the atrial volume receptors. Not only ...