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金融强监管与企业集团内部资本市场资源配置——来自资管新规的经验证据

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中国工业经济 2024年第1期 131-149页

作者：汤晟饶品贵李晓溪暨南大学管理学院

加强和完善现代金融监管是金融市场保持效率和活力的基础,也是提高资源配置效率的关键。本文基于资管新规实施这一准自然实验,研究金融强监管是否会促使企业集团内部资本市场资源动态调整进而达到优化资源配置效率的目标。研究发现,资... 详细信息

加强和完善现代金融监管是金融市场保持效率和活力的基础,也是提高资源配置效率的关键。本文基于资管新规实施这一准自然实验,研究金融强监管是否会促使企业集团内部资本市场资源动态调整进而达到优化资源配置效率的目标。研究发现,资管新规实施后,金融资产配置程度较高的企业集团,其子公司现金持有比率显著下降,这表明资管新规促进了企业集团的内部资本市场资源再配置。机制分析表明,资管新规通过降低金融投资活动利润率、减少金融资产配置作用于内部资本市场资源配置。进一步,面对资管新规的实施,集团母公司通过影响子公司分红决策来降低子公司持有现金比率。本文从集团管控动机和管控能力两方面进行异质性分析发现,管控动机越强(母子公司代理成本更高、母公司投资机会更大、企业集团行业竞争程度更激烈)、管控能力越大(母子公司地理距离越近、母公司对子公司平均持股比例更大)的集团,上述效果更明显。经济后果方面,资管新规促使企业集团内部资本市场资源动态调整这一行为最终提高了企业集团价值与全要素生产率,达到了优化资源配置效率目标。本文不仅从内部资本市场资源配置及其效率的角度为金融监管的经济后果提供了新的微观证据,也对处理好金融监管与实体经济增长的关系具有重要启示。

关键词：金融监管资管新规企业集团内部资本市场现金持有比率

‘‘Complexation–precipitation'' metal separation method system and its application in secondary resources

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Rare Metals 2014年第4期33卷 369-378页

作者： Zuo-Ren Nie li-Wen Ma xiao-li xi College of Materials Science and Engineering Beijing University of Technology

Recovery processes of secondary resources usually encounter problems because of the diverse com- positions of wastes. To enhance the applicability of tradi- tional hydrometallurgical process toward secondary resources, the adjustment of components is necessary. In traditional hydrometallurgical separation, precipitation and complexation are extensively used. However, their com- bination as a specific metal separation method has not yet been studied in detail. This approach is very promising for solving problems caused by changeable components during recycling processes of secondary resources. This paper reviews the effects of precipitation and complexation in metal separation processes, and a metal separation method system of ＂complexation-precipitation＂ developed to adjust the components of secondary resources is introduced.

关键词： Secondary resources Complexation-precipitation Method system Metal separation

酶解耦合湿热处理对板栗淀粉消化性能与回生性能的影响

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粮油食品科技 2024年第2期32卷 14-20页

作者：屈腾飞涂园黄双霞何忠超陈玲李晓玺华南理工大学食品科学与工程学院淀粉与植物蛋白深加工教育部工程研究中心广东省天然产物绿色加工与产品安全重点实验室广东广州510640

板栗淀粉的消化和回生性能制约着板栗食品产业发展,合理选择食品加工方法调控板栗淀粉的消化和回生性能对开发高品质营养健康的板栗食品具有重要意义。本文探究了普鲁兰酶酶解及耦合湿热处理对板栗淀粉的消化率、长期回生和多尺度结构... 详细信息

板栗淀粉的消化和回生性能制约着板栗食品产业发展,合理选择食品加工方法调控板栗淀粉的消化和回生性能对开发高品质营养健康的板栗食品具有重要意义。本文探究了普鲁兰酶酶解及耦合湿热处理对板栗淀粉的消化率、长期回生和多尺度结构的影响。结果显示,酶解处理增加了板栗淀粉的直链淀粉含量,改变了淀粉链长分布,提高了淀粉短程有序结构和结晶结构,从而降低了淀粉消化率;进一步的湿热处理促进淀粉链相互作用,提高了淀粉短程有序结构、结晶结构和纳米聚集体结构,导致了更低的淀粉消化率。在储存过程中,由于酶解导致更短的A链增加及易于重排的B1链降低,使得淀粉形成的结晶结构和纳米聚集体结构较少,从而降低了淀粉的回生程度;湿热处理促进了A链分子与其他分子的相互作用,加剧抑制淀粉分子重排程度,导致回生程度继续降低。因此,酶解耦合湿热处理可作为一种有效的调控淀粉消化和回生性能的方法,促进慢消化和低回生度板栗淀粉食品的开发。

关键词：板栗淀粉普鲁兰酶酶解湿热处理消化率回生多尺度结构

Comprehensive recovery of W,V,and Ti from spent selective reduction catalysts

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Rare Metals 2023年第10期42卷 3518-3531页

作者： li-Wen Ma xiao-li xi Jia-Peng Chen Fan Guo Zi-Jie Yang Zuo-Ren Nie Key Laboratory of Advanced Functional Materials Ministry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing100124China Collaborative Innovation Center of Capital Resource-Recycling Material Technology Beijing University of TechnologyBeijing100124China National Engineering Laboratory for Industrial Big-Data Application Technology Beijing University of TechnologyBeijing100124China

In this study,spent WO_(3)/V_(2)O_(5)-TiO_(2) catalysts used for selective catalytic reduction were treated by a hydrometallurgical process to comprehensively recover valuable metallic elements,such as W,V,and *** and Si impurities were preferentially removed by selective micro wave-assisted alkali leaching.W and V were leached by enhanced high-pressure leaching with efficiencies estimated at 95% and 81%.The leaching of W and V followed the nuclear shrinkage model controlled by the combination of product layer diffusion and interfacial chemical reaction.A synergistic extraction was applied to separate W and V using an extractant mixture of di-(2-ethylhexyl)phosphoric acid P204 and the primary amine *** extraction efficiencies of V and W reached 86.5% and 6.3%,respectively,with a separation coefficient(V/W) of *** product was precipitated after extraction to yield ammonium paratung state(APT) and NH_(4)VO_(3).The TiO_(2)catalyst carrier residue meets commercial specifications for *** comprehensive recovery process with the characteristics of high-pressure leaching and synergistic extraction realizes the resourceful utilization of the spent catalysts.

关键词： Spent selective catalytic reduction(SCR)catalysts Microwaveleaching Pressure leaching Synergistic extraction Comprehensive recovery

Reply to ＂Comparing Shikani Optical Stylet and Macintosh Laryngoscope for Orotracheal Intubation＂

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Chinese Medical Journal 2017年第13期130卷 1630-1638页

作者： Mao Xu xiao-xi li xiang-Yang Guo Jun Wang Department of Anesthesiology Peking University Third Hospital Beijing 100191 China Department of Anesthesiology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital and Institute Beijing 100142 China

To the Editor： We thank Dr. Wang, et al. for the comments in our article. With regard to the flint comment point, we agreed with them that Connack-Lehane grades 34 with Macintosh laryngoscope should be defined as difficult laryngoscopy. The definition of difficult airway in our paper should be difficult laryngoscopy, not difficult airway.

关键词： Macintosh Optical 气管插管评论定义气道

Applications of molten salt and progress of molten salt electrolysis in secondary metal resource recovery

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International Journal of Minerals,Metallurgy and Materials 2020年第12期27卷 1599-1617页

作者： xiao-li Ming Feng li-wen Zhang Zuo-ren Nie College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 100124China National Engineering Laboratory for Industrial Big-data Application Technology Beijing University of TechnologyBeijing 100124China

Molten salt is an excellent medium for chemical reaction,energy transfer,and *** salt innovative technologies should be developed to recover metals from secondary resources and reserve metals from primary natural *** these technologies,molten salt electrolysis is an economic and environment-friendly method to extract metals from waste *** the perspective of molten salt characteristics,the application of molten salts in chemistry,electrochemistry,energy,and thermal storage should be comprehensively *** review discusses further directions for the research and development of molten salt electrolysis and their use for metal recovery from various metal wastes,such as magnet scrap,nuclear waste,and cemented carbide *** is placed on the development of various electrolysis methods for different metal containing wastes,overcoming some problems in electrolytes,electrodes,and electrolytic *** focus is given to future development directions for current associated processing obstacles.

关键词： molten salt application molten salt electrochemistry resource recycling cemented carbide scrap

Genetic mutations associated with chemical resistance in the cytochrome P450 genes of invasive and native Bemisia tabaci （Hemiptera： Aleyrodidae） populations in China

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Insect Science 2009年第3期16卷 237-245页

作者： Bao-li Qiu li liu xiao-xi li Vartika Mathur Zhen-Qiang Qin Shun-xiang Ren Department of Entomology South China Agricultural University Guangzhou China Department of Zoology Sri Venkateswara CollegeUniversity of Delhi Delhi 110021 India

Bemisia tabaci （Gennadius） is a species complex, and its two most damaging biotypes B and Q are globally distributed pests. Despite increasing biological and economic impacts, little is known about the evolutionary mechanisms that favor their competition with native populations. Here, we investigated the genetic mutations in the P450 gene of the invasive B, Q biotypes and the native Cv population. Four mutations associated with chemical resistance, Pro-Leu, Ala-Ser, Ser-Phe and Trp-Leu, were found in the cytochrome P450 CYP6C and CYP9F genes of the B and Q biotypes. Bioassay results also revealed that both the B and Q biotypes have about 12-47 times more resistance to acephate, beta- cypermethrin, methomyl, and 5-7 times more resistance to imidacloprid insecticide than Cv population. Our results provide a molecular approach for better understanding and monitoring the pesticide resistances of invasive and native B. tabaei populations in China.

关键词： Bemisia tabaci biotype cytochrome P450 gene genetic mutation pesticide resistance

Acid-base buffer effect of fulvic acid and barium fulvate from weathered coal

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Journal of Coal Science & Engineering(China) 2009年第4期15卷 415-419页

作者： GUO xiao-feng li xi-feng Mining Engineering Institute Taiyuan University of Science and Technology Taiyuan 030024 China

The acid-base buffer characteristics of fulvic acid (FA) and barium fulvate (BaFA)were analyzed. Each share of the sample or model agents (phthalic acid and salicylic acid)were separately mixed into a series of shares of dilute solutions of HCI or NaOH with a series of concentration. The original pH values of the solutions were arranged from 2 to *** balanced pH of each share was measured. The pH changes show that FA and BaFApossess buffer ability, whereas the model agents do not. The tendency of balanced pHvalues was 5.4 for FA and 7.4 for BaFA, whereas the original pH was 4.0-8.5; balancedpH changed little. At room temperature, the maximum buffer capacities were as follows:18.11 mmol hydroxyl per gram FA, 11.25 mmol hydroxyl per gram BaFA, 1.19 mmol protonper gram FA, and 1.45 mmol proton per gram BaFA. Mathematics analysis shows thatlogarithm of buffer capacities of FA and BaFA is linearly dependent on original pH. Compared with BaFA and model agents, it is concluded that FA buffer capacity against hydroxylrelies not only on its acidic groups, BaFA buffer capacity against hydroxyl does not rely onits acidic groups, and FA buffer capacity against proton is not related with its carboxyl andphenolic hydroxyl group. The pH values of FA-water solutions with different concentrationsfrom 1 to 10 grams per liter were measured. Their pH values were slightly affected by itsconcentration. Thus, FA possesses a much stronger buffer ability against water dilutionthan common buffer agent. All the pH values of FA water solutions were very nearby 5.4,just the same as the balanced pH tendency for adding FA.

关键词： acid-base buffer fulvic acid barium fulvate weathered coal pH value

Improvement in oxidation resistance of Cantor alloy through microstructure tailoring

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China Foundry 2022年第6期19卷 503-510页

作者： Bao-lin Pang Man Wang Yue-gang Shen xiao-li xi Zuo-ren Nie Collaborative Innovation Center of Capital Resource-Recycling Material Technology Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China National Engineering Laboratory for Industrial Big-data Application Technology Beijing University of TechnologyBeijing 100124China

A method of improving the oxidation resistance of Cantor alloy through microstructure tailoring was *** with distinctive microstructures were achieved by different annealing treatments on the cold-rolled Cantor *** test was then carried out on the various annealed samples at 800°C for 24 h in *** oxidation behavior was evaluated in terms of oxidation rate,surface and cross-section microstructure *** stratified oxide layers including outer Mn_(2)O_(3) and inner Cr_(2)O_(3) were observed in all the annealed samples,the thickness of Mn_(2)O_(3) and Cr_(2)O_(3) layers was ***,the samples exhibited different oxidation *** results indicate that the oxidation resistance of various annealed samples is closely related with grain size as well as twin density.

关键词： Cantor alloy annealing temperature grain size twins oxidation behavior