نتایج جستجو برای: 4 â polyisoprene
تعداد نتایج: 1310790 فیلتر نتایج به سال:
since Φ̂(ω)Φ̂(−θ) = e−σ2(‖ω‖2+‖θ‖2)/4 = Φ̂(ω−θ)e−σ2(ω·θ∗+ω∗·θ)/4. (9) Assuming X is near equilibrium then, at reasonably low temperature, the power spectrum of the point configuration shows the bluenoise properties, i.e., has a delta at the origin and vanishes in an annulus around it. The approximation function Â(ω) equals to this function times Φ̂(ω) which is zero outside the angulus and hence Â(ω...
Administration of nickel carbonyl to rats inhibited RNA synthesis by a chromatin-RNA polymerase complex prepared from lysed hepatic nuclei. Rats were killed 6 hr after i.v. administration of Ni(CO)4 in LDSO dosage (2.2 mg Ni/100 g body weight). The rate of RNA synthesis by the chromatinRNA polymerase complex from Ni(CO)4-treated rats averaged 0.16 (S.E. = ±0.02, N = 18) ¿/mole cytidine tripho...
Ten phenolic compounds were isolated from a butanol fraction of sage extracts. Their structures were determined by spectral methods (NMR, MS, IR). Among them, a novel compound, 4-hydroxyacetophenone-4-O-â-D-apiofuranosyl-(1f6)-O-â-D-glucopyranoside, was identified. Two test systems, DPPH free radical scavenging activity and radical cation ABTS•+ scavenging activity, were used to evaluate their ...
The 0-24-h urinary metabolic profile of cyclophosphamide was inves tigated in a series of 14 patients with various malignancies receiving combination chemotherapy including i.v. cyclophosphamide. This was accomplished using combined thin-layer chromatography-photographydensitometry, which can quantitate cyclophosphamide and its four prin cipal urinary metabolites (4-ketocyclophosphamide, nor-ni...
Aniline and o-, m-, and /Moluidine, which are representative of aro matic amines in cigarette smoke, were identified and quantified in human urine. Smokers excreted 3.1 ±2.6 «¿g/24 h of aniline and 6.3 ±3.7 ¿ig/ 24 h of o-toluidine (n = 16). Nonsmokers excreted 2.8 ±2.5 Mg/24 h of aniline and 4.1 ±3.2 un; 24 h of o-toluidine (n = 12). Metaand /»toluidine were detected in the urine of 2 ...
Previous results obtained for the cis-polymerisation of isoprene with scandium half-sandwich complex Cp*Sc(BH(4))(2)(THF) 1a were extended to its neodymium analog. The X-ray structure of the already reported neodymium monomer compound Cp*Nd(BH(4))(2)(THF)(2) 1b is presented. Cp*Nd(BH(4))(2)(THF)(2)/[CPh(3)][B(C(6)F(5))(4)]/Al((i)Bu)(3) catalytic system was found to be very active and stereosele...
åÌÓ„Ë ÚÎË (Hemiptera: Aphididae), Í‡Í Ë ÔÓ ̃Ë ̇ÒÂÍÓÏ ̊ ÓÚfl‰‡ Homoptera, ÔËÚ‡ ̨ÚÒfl ÙÎÓ ̋ÏÌ ̊Ï ÒÓÍÓÏ ‡ÒÚÂÌËÈ [2]. Ç Ò‚flÁË Ò ÚÂÏ, ̃ ÚÓ ̋ ÚÓÚ ÒÓÍ ÒÓ‰ÂÊËÚ ÎË ̄ ̧ 20% ÌÂÁ‡ÏÂÌËÏ ̊ı ‡ÏËÌÓÍËÒÎÓÚ, ÌÂÓ·ıÓ‰ËÏ ̊ı ‰Îfl ÌÓχΠ̧ÌÓ„Ó ‡Á‚ËÚËfl Ë ÊËÁ̉ÂflÚÂÎ ̧ÌÓÒÚË ÚÎÂÈ [3], ÔÓÒΉÌË “‚ ̊ÌÛʉÂÌ ̊ ‚ÒÚÛÔ‡Ú ̧” ‚ ÒËÏ·ËÓÚË ̃ÂÒÍË ÓÚÌÓ ̄ÂÌËfl Ò ̋̉ӈËÚÓ·ËÓÚË ̃ÂÒÍËÏË ·‡ÍÚÂËflÏË Ó‰‡ Buchnera, ÍÓÚÓ ̊ ‚ÓÒÔÓÎÌfl ̨Ú Ì‰ÓÒÚ‡ ̨ ̆ËÂ...
Mechanisms for resistance were studied in three classic type, human small cell lung cancer cell lines, (.!(,,, (.I.(',„,and <;i.<',.i, that were established from one patient during clinical follow-up. Clinically the tumor changed from sensitive (<;!,(,,) to completely resistant to (chemo)therapy ((il.(.',,,) during this period. The stain with JSB-1 anti body, detecting the M, 170,000 multidru...
Freshly isolated Morris Hepatoma 7777 cells were prepared for a study of the utilization of palmitate and 0-hydroxybulyrale as metabolic fuels compared to other major energy substrates (glucose and glutamine). These cells were capable of oxidizing both |i/-'4C]palmilale and 0[3-'4C]hydroxybutyrate although the rates accounted for only 10 ±3 (SD) and 9 ±4% of total oxygen consumed, respectivel...
A degradation study of polystyreneepolybutadieneepolystyrene and polyisopreneepolystyrenee polyisoprene in both dichloromethane and hexane solvents is presented. Alternative solvents for metathetic degradation provide the potential for greener chemistry, better selectivity, and control over the products. The catalyst concentration and solvent selection both determine the products formed. The de...
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