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- Keywords Poly DL Lactide Ring opening Polymerization Average Molar Mass; 聚DL丙交酯;開(kāi)環(huán)聚合;平均摩爾質(zhì)量;
- Z+1 average molar mass Z+1均分子量
- Weight average relative molecular mass, polydispersity and gel permeationchromatograms during the degradation process were obtained. 發(fā)現聚合單元為隨機分布的殼聚糖樣品,其降解是均勻的;
- Different grades of crystal polystyrene molding pellets range from 150,000 to 350,000 weight average molecular weight. 不同牌號的結晶聚苯乙烯模塑粒料平均分子量范圍從150,000-350,000。
- It was concluded that the parameters of dilatational viscoelasticity changed with the increase of molar mass of fractions or dilatational frequency. 結果表明,伊朗重質(zhì)減渣餾分的擴張粘彈性參數隨餾分的增重以及擴張頻率增大而遞變。
- The molar mass (MM) of polymer HPAM suitable for use in polymer flood in middlle-low permeability reservoirs of Daqing is studied. 對可用于大慶油田中低滲油藏聚合物驅的聚合物HPAM的適宜分子量進(jìn)行了研究。
- Objective:To determine the distribution of weight averag e molecular weight in the Phytolacca acinosa Roxb. 目的:測定商陸多糖的重均相對分子質(zhì)量。
- A device for determining molar mass with freezing point depression was improved,which consists of the Dewar bottle,sample container,Beckmann thermometer,and motor stirrer. 介紹一個(gè)改進(jìn)的凝固點(diǎn)下降法測定摩爾質(zhì)量實(shí)驗裝置,它由保溫瓶、凝固點(diǎn)杯、貝克曼溫度計、電動(dòng)攪拌器等幾部分構成。
- Different grades of crystal polystyrene molding pellets range from 150, 000 to 350, 000 weight average molecular weight. 不同牌號的結晶聚苯乙烯模塑粒料平均分子量范圍從150,000-350,000。
- IAS 2 allows the FIFO or weighted average cost formulas. 實(shí)驗結果表明該方法優(yōu)于傳統的加權平均系數組合方法。
- With zinc D, L-lactate as catalyst, which is safe to body, PDTC with Mw as 700000g/mol was prepared when the reaction mixture was irradiated for 75min under 180W microwave power. This method was proved to be ideal for preparing PDTC with high molar mass. 作者使用對人體安全可靠的D,L-乳酸鋅為催化劑,進(jìn)行DTC的微波開(kāi)環(huán)聚合,在180W的微波功率下輻照75min,得到了重均分子量為700000g/mol的PDTC,這一方法是合成高分子量PDTC的理想方法。
- General expressions of molecular parameters, such as the number and the weight average degrees of polymerization and the polydispersity index, were derived. 重均分子量和多分散指數在穩態(tài)條件下的通解。上述通解普適于各種不同的兩物種體系,只是通解中的系數隨反應機理的不同而異。
- Polystyrene polymethacrylate diblock copolymers with well defined structures asw- ell as controlled and narrow molar mass distribution were obtained from the lower mass polystyrene macroinitiator. 聚苯乙烯 -聚甲基丙烯酸酯嵌段共聚物的分子量可控 ,分子量分布較窄 ,單體轉化率較高。
- The weighted average fee maximum assistance levels will be adjusted annually. 加權平均學(xué)費最高資助額會(huì )每年予以調整。
- Note: Based on the weighted average outstanding shares of each year. 註一:按各年度發行在外加權平均股數計算。
- The weight average molecular weights for the three fish gelatins are given in Table 4. 這三種魚(yú)膠的重均分子量在表四中給出。
- Dave's Molar Mass and Percent by Mass Calculator 分子量及元素百分比計算器
- The weight average of relative molecular weight of hydroxypropyl sulfated oligo-konjac glucomannan is l595D, the number average of relative molecular weight is 1572D, and PDI (MW/MN) is 1.01 by GPC. 凝膠色譜測定重均相對分子質(zhì)量1595D,數均相對分子質(zhì)量1572D,分子量分布PDI(MW/MN)為1.;01,表明樣品是單分散性分子量分布。
- The mensuration of molar mass of organic acid 有機酸摩爾質(zhì)量的測定
- Tare Weight: in accordance with the quantity and package type, CIQ will sample(1-5)% bales from each lot of cotton and compute the average tare weight by weighted average. 皮重:根據數量的多少、裝類(lèi)型的差異,CIQ將從每批貨中隨機抽取(-5)的包數,以加權平均確定平均皮重。