SB—1有机硼交联剂研究及应用

根据压裂液交联剂的发展趋势，本文讨论了有机硼交联剂的合成及与植物胶交联机理，通过与无机硼，有机钛，有机锆等交联剂的对比，说明了有机硼所具有的特点，并对有机硼与羟丙基瓜尔胶交联的压裂液进行了性能评价，该有机硼交联剂在现场得到了广泛应用，取得了良好的增油效果。     

Substance GP-2250 as a New Therapeutic Agent for Malignant Peritoneal Mesothelioma—A 3-D In Vitro Study

Malignant peritoneal mesothelioma is a rare tumor entity. Although cytoreductive surgery and hyperthermic intraperitoneal chemotherapy have increased overall survival, its prognosis remains poor. Established chemotherapeutics include mitomycin C (MMC) and cisplatin (CP), both characterized by severe side effects. GP-2250 is a novel antineoplastic agent, currently under clinical investigation. This in vitro study aims to investigate effects of GP-2250 including combinations with CP and MMC on malignant mesothelioma. JL-1 and MSTO-211H mesothelioma cell lines were treated with increasing doses of GP-2250, CP, MMC and combination therapies of GP-2250 + CP/MMC. Microscopic effects were documented, and a flow-cytometric apoptosis/necrosis assay was performed. Synergistic and antagonistic effects were analyzed by computing the combination index by Chou-Talalay. GP-2250 showed an antiadhesive effect on JL-1 and MSTO-211H spheroids. It had a dose-dependent cytotoxic effect on both monolayer and spheroid cultured cells, inducing apoptosis and necrosis. Combination treatments of GP-2250 with MMC and CP led to significant reductions of the effective doses of CP/MMC. Synergistic and additive effects were observed. GP-2250 showed promising antineoplastic effects on malignant mesothelioma cells in vitro especially in combination with CP/MMC. This forms the basis for further in vivo and clinical investigations in order to broaden treatment options.     

Reducing organizational conflict: An incompatible response approach.

186 undergraduates played the role of executives and discussed important organizational issues with a confederate, who disagreed strongly with each S's views. Disagreement was expressed in a calm and reasonable manner or in an arrogant and condescending fashion. Ss were then exposed to 1 of 3 treatment conditions (sympathy, gratitude, or amusement) designed to induce positive states incompatible with anger or to a no-treatment control condition. Results show that relative to the control condition the 3 treatment conditions improved Ss' moods, enhanced their impressions of the confederate, and increased their preference for constructive as opposed to destructive modes of dealing with conflict. Disagreement expressed in a condescending manner produced significantly more negative effects on all dependent measures than disagreement expressed in a reasonable fashion. (20 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Separation of CO2/CH4 mixtures with the MIL-53(Al) metal–organic framework

Adsorptive separation of CH₄/CO₂ mixtures was studied using a fixed-bed packed with MIL-53(Al) MOF pellets. Such pellets of MIL-53(Al) were produced using a polyvinyl alcohol binder. As revealed by N₂ adsorption isotherms, the use of polyvinyl alcohol as binder results in a loss in overall capacity of 32%. Separations of binary mixtures in breakthrough experiments were successfully performed at pressures varying between 1 and 8 bar and different mixture compositions. The binary adsorption isotherms reveal a preferential adsorption of CO₂ compared to CH₄ over the whole pressure and concentration range. The separation selectivity was affected by total pressure; below 5 bar, a constant selectivity, with an average separation factor of about 7 was observed. Above 5 bar, the average separation factor decreases to about 4. The adsorption selectivity is affected by breathing of the framework and specific interaction of CO₂ with framework hydroxyl groups. CO₂ desorption can be realised by mild thermal treatment.     

32位微控制器——嵌入式市场的助推剂

下面的话听起来可能让人觉得荒谬:要进入微控制器市场,你必须事实上已经入了这一行.围绕着每一种类型的微控制器的残酷竞争已经把价格拉得如此之低,以至于如果你需要获取外设与各种存储器的许可或者购买这些构成MCU价格的主要组成部分的模块的话,你就无利可图.达还不够:你必须向你的客户提供大量的MCU结构选项.     

The persistence of print among university students: An exploratory study

As use of digital devices has grown, university students (along with faculty and administrators) are considering whether academic reading should be done in print or on digital screens. Some studies have indicated that comprehension in the two media is equivalent, while other research has questioned this conclusion. Furthermore, we have little systematic knowledge about students’ own attitudes and practices regarding reading in hardcopy versus onscreen.The present investigation gathered quantitative and qualitative survey data from 429 university students in the US, Japan, Germany, Slovakia, and India. The quantitative findings revealed high levels of affirmation about advantages of reading in print. Nearly 92% said they concentrated best when reading in print, and more than four-fifths reported that if cost were the same, they would prefer print for both schoolwork and pleasure reading. Students reported they were more likely to re-read printed material than digital; they were also more likely to multitask when reading onscreen. Qualitative questions asked what students liked most and liked least about reading in hardcopy and reading digitally. Using a fine-grained coding scheme, these responses were quantified. Advantages reported for print included ease of annotation and paper’s tactile properties, while among the disadvantages were lack of convenience and expenditure of environmental or monetary resources. The biggest advantage of screen reading was convenience, while the primary disadvantages were eyestrain and distraction.     

Compatibilization of starch/poly(butylene adipate‐co‐terephthalate) blown films using itaconic acid and sodium hypophosphite

Itaconic acid (IA) has potential as a compatibilizing agent in polymeric blends due to its unique chemical characteristics. Sodium hypophosphite (SHP) has been studied as a catalyst in esterifying reactions using multicarboxylic acids. Starch/poly(butylene adipate‐co‐terephthalate) blown films containing IA, with and without SHP, were produced. The film containing IA presented higher tensile strength (8.166 MPa) and elongation (891.473%) than the control film (5.548 MPa and 487.637%, respectively). When SHP was added (sample IA‐SHP), tensile strength increased even more (9.215 MPa); however, elongation (636.821%) was lower than in the IA film. This behavior was attributed to crosslinking between two starch itaconoate molecules intermediated by SHP. The increase in the compatibility between the polymeric phases justified the lower permeability to water vapor of the IA‐SHP films and was responsible for the production of films with a more compact and homogeneous structure. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46629.