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- （7R9-di-O-β-D-glucopyranoside
- 7R-Ⅲ級機構7R-Ⅲ degree mechanism
- 活性艷橙K-7Rreactive brilliant wrange K-7R
- 3-7R并聯(lián)解耦機構3-7R parallel decoupling mechanism
- (6R,7R)-7-[2-呋喃基(甲氧亞氨基)乙酰氨基]-3-羥甲基-8-氧代-5-硫雜-1-氮雜二環(huán)[420]辛-2-烯-2-甲酸的合成研究Study on synthesis of (6R,7R)-7-[[2-furanl(methoxyimino)acetyl]amino]-3-hydroxymethyl-8-oxo-5-thia-1-azabicyclo-3-hydroxymethyl-8-oxo-5-thia-1-azabicyclooct-2-ene-2-carboxylic acid
- 通過(guò)C-分帶將奧地利黑麥1R~7R的7條染色體區分開(kāi)來(lái),其C-帶帶型公式為2n=14=2C+I+T+2C+T+4I+T+2C+I+T++2T+2ST。Austria rye chromosomes were differentiated from 1R to 7R; and the band formula was 2n=14=2C_+I_+T+2C~+T+4I_+T+2C_+I_+T~++(2T+)2ST.
- 向量的微回轉代數是機構運動(dòng)分析的有限微回轉法的數學(xué)基礎,作為向量微回轉代數的應用、本文對一空間一般7R,7桿機構進(jìn)行了運動(dòng)分析。The algebra of infinitesimal rotation is the mathematical background of the micro-rotation method,a method for the kinematic analysis of mechanisms. As a concrete example of application cf tbs algebra, the paper also discusses ths kinematic analysis of a general spatial 7R, 7-link mechanism.
- 結果表明 :RO- 32油和RO - 4 0油不宜作為替代工質(zhì)R32 R134a的YZG - 2 7R型壓縮機用油 ,EAL - 4 6油可以作為R32 -R134a的YZG - 2 7R型壓縮機用油 ;Test results indicate that lubricant RO-32 and RO-40 are not suitable for R32/R134a in rotary compressors of YZG-27R, while lubricant EAL-46 can be used.
- 壓縮機加速壽命試驗研究結果表明 :RO-3 2油和 RO-4 0油不宜作為替代工質(zhì) R3 2 /R13 4a的 YZG-2 7R型壓縮機用油 ,而 EA L-4 6油可以作為 R3 2 /R13 4a的 YZG-2 7R型壓縮機用油 ;Test results indicate that lubricant RO-32 and RO-40 are not suitable for R32/R134a in rotary compressor of YZG-27R, while lubricant of EAL-46 can be used.
- a、C-3位直接與雙鍵相連的頭孢菌素衍生物：分別以“分步法”與“一鍋法”采用魏悌錫(Wittig)反應合成了(6R,7R)-7-苯乙酰氨基-8-氧代-5-硫-1-氮雜雙環(huán)[4.2.0]辛-2-烯-3-乙烯基-2-羧酸二苯甲基酯(8)。Diphenylmethyl(6R,7R)-8-oxo-7-(phenylacetyl)amino-3-vinyl-5-thia-l-azabicyclo[4.2.0] oct-2-ene-2-carboxylate(8) were synthesized according to Wittig Reaction via fractional step method and one-pot process separately.
