http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Zhi Liu,Xinli Zhang,Haibing Huang,Jianjun Yi,Wei Liu,Weijiao Liu,Hongpeng Zhen,Kejing Gao,Mingge Zhang,Wantai Yang,Qigu Huang 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.6
A new method was presented for preparing (co-)polyethylene with broad molecular weight distribution (MWD) and high molecular weight employed by the novel heterogeneous Ziegler–Natta catalysts via one-pot strategy. The preparation of these catalysts involved the introduction of alkoxy silane compounds as electron donors. The influences of the electron donors structure, as well as polymerization conditions such as temperature, molar ratio of Al/Ti, ethylene pressure and the concentration of 1-hexene in feed on the polymerization performance for ethylene (co-)polymerization, were investigated. The morphology of the catalyst particles was characterized by SEM and Ti content of these catalysts was characterized by ICP. The GPC results showed that the obtained homopolyethylene and ethylene/1-hexene copolymer had the widest molecular weight distribution up to ca 50 when diethoxy-isopropoxy-(t–butoxy)-silane (ED3) was used as internal electron donor. The 13C NMR and FT-IR analysis indicated that these catalysts efficiently catalyzed the copolymerization of ethylene with 1-hexene.
Xiang Li,Yubo Liu,Weijiao Yang,Baozhong Ma,Yongqiang Chen,Chengyan Wang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-
The recovery rates of copper (99 %) and cobalt (93 %) could be significantly increased by adding sodiumsulfate in activated roasting of Cobalt-rich copper sulfide (CRCS). The mechanism and kinetic parametersof CRCS roasting with sodium sulfate addition were not clear. Thus, in this study, the thermal roastingkinetics of carrollite (the predominant cobalt occurrence mineral) in CRCS adding Na2SO4 with an airatmosphere was studied in detail by TG-DTG method. The apparent activation energy (E) and preexponentialfactor (A) were obtained via Flynn-Wall-Ozawa method (FWO) and Kissinger-Akahira-Sunose method (KAS) methods, where E values were 113.89 kJmol1 (KAS) and 120.87 kJmol1(FWO). The thermodynamic parameters of the roasting process were evaluated. The model function forthe carrollite reaction was determined via Malek analysis. The mechanism of sodium sulfate additionin CRCS roasting was studied. Results showed that the addition of sodium sulfate in activated roastingcan promote the transformation of carrollite mineral phase. The activation energy value of the oxidationprocess of carrollite decreases. From the kinetic point of view, the addition of sodium sulfate can promotethe activation roasting.
1,3,5-Triazine-Cored Maltoside Amphiphiles for Membrane Protein Extraction and Stabilization
Ghani, Lubna,Munk, Chastine F.,Zhang, Xiang,Katsube, Satoshi,Du, Yang,Cecchetti, Cristina,Huang, Weijiao,Bae, Hyoung Eun,Saouros, Savvas,Ehsan, Muhammad,Guan, Lan,Liu, Xiangyu,Loland, Claus J.,Kobilka American Chemical Society 2019 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.141 No.50
<P>Despite their major biological and pharmacological significance, the structural and functional study of membrane proteins remains a significant challenge. A main issue is the isolation of these proteins in a stable and functional state from native lipid membranes. Detergents are amphiphilic compounds widely used to extract membrane proteins from the native membranes and maintain them in a stable form during downstream analysis. However, due to limitations of conventional detergents, it is essential to develop novel amphiphiles with optimal properties for protein stability in order to advance membrane protein research. Here we designed and synthesized 1,3,5-triazine-cored dimaltoside amphiphiles derived from cyanuric chloride. By introducing variations in the alkyl chain linkage (ether/thioether) and an amine-functionalized diol linker (serinol/diethanolamine), we prepared two sets of 1,3,5-triazine-based detergents. When tested with several model membrane proteins, these agents showed remarkable efficacy in stabilizing three transporters and two G protein-coupled receptors. Detergent behavior substantially varied depending on the detergent structural variation, allowing us to explore detergent structure-property-efficacy relationships. The 1,3,5-triazine-based detergents introduced here have significant potential for membrane protein study as a consequence of their structural diversity and universal stabilization efficacy for several membrane proteins.</P> [FIG OMISSION]</BR>