A Pore-Forming Strategy Toward Porous Carbon-Based Substrates for High Performance Flexible Lithium Metal Full Batteries

Self-standing carbon-based substrates with satisfied structural stability and property adjustability have promising applications in flexible lithium(Li)metal batteries(FLMBs).Current strategies for modifying carbon materials are normally carried out on powder carbon,and very few of them are suitable for self-standing carbon substrates.Herein,a pore-forming strategy based on the redox chemistry of metallic oxide nanodots is developed to prepare two porous carbon substrates for anode and cathode.Starting with cotton cloth,the resulting hollow carbon fibers substrate with nanopores effectively prevents from Li dendrites formation and large volume change in lithium metal anode(LMA).Simulations indicate that the porous structure leads to homogeneous ion flux,Li-ion concentration,and electric field during Li deposition.Li symmetrical cell based on this substrate remains stable for 8300 h with an ultralow voltage hysteresis of 9 mV.Via a similar route,porous carbon cloth substrate is obtained for subsequently seeding V_(2)O_(5)nanowires to prepare the cathode.The assembled FLMBs pouch cell delivers a capacity of 8.2 mAh with a high capacity retention of~100%even under dramatic deformation.The demonstrated strategy has far-reaching potential in preparing free-standing porous carbon-based materials for flexible energy storage devices.

心理资本在护理实践环境和男护士工作投入间的中介作用

目的探索影响男护士心理幸福感的环境因素和个人因素,以及护理实践环境影响男护士工作投入的心理机制,从而为临床护理管理者制订措施提供一定的参考。方法采用护理实践环境指数量表(Nursing Work Index-Practice Environment Scale,NWI-PES)、心理资本问卷(Psychological Capital Questionnaire,PCQ-24)以及工作投入量表(Utrecht Work Engagement Scale,UWES)对中国长沙市3所三级甲等医院的161名男护士进行调查。结果男护士护理实践环境得分为(2.88±0.31)分、心理资本得分为(4.42±0.62)分,工作投入得分为(3.17±1.39)分,均处于中等以上水平。其中,3个量表中得分最低的维度分别为:护理人力资源充足(2.72±0.48)分、希望(4.33±0.72)分以及奉献(2.96±1.61)分。护理实践环境和心理资本都能够正向预测男护士的工作投入,男护士心理资本在护理实践环境和工作投入之间起完全中介作用。结论改善护理实践环境能够通过增加男护士的心理资本来增加其工作投入。护理管理者可以通过提供合理的工作量,和男护士一起制订工作目标等途径来增加他们的希望水平。

Physicochemical Properties and Nutritional Ingredients of Kernel Oil of <i>Carya cathayensis</i>Sarg

Carya cathayensis Sarg is distributed near Tianmu mountain areas in Zhejiang Province and Anhui Province, China. Kernel of Carya cathayensis Sarg, which is well-known for the daintiness and nutritional content, is popular and very delicious food in eastern China. In this paper, we investigated the physiochemical properties and nutrient gradients of the kernel oil of Carya cathayensis Sarg. The results showed that the kernel oil of Carya cathayensis Sarg contained 63% of fat, 9.1% of proteins, 3.6% of starch and 4.6% of soluble proteins (based ration of weight). The compositions of the fatty acids were very similar to olive oil, and the total unsaturated fatty acids were 94%. Meanwhile, the kernel oil of Carya cathayensis Sarg also contained some polyphenols such as vanillic acid, ferulic acid, 3-methoxybenzoic acid and quercetin. The content of total polyphenols was 9.7 μg/g. Furthermore, the kernel oil of Carya cathayensis Sarg also contained some trace amount of squalene, β-Sitosterol, Vitamin E.

Chemistry of the Main Component of Essential Oil of <i>Litsea cubeba</i>and Its Derivatives

The tree of Litsea cubeba is widely spread in China, Indonesia and other part of Southeast Asia. The essential oil of Litsea cubeba (EOLC) is obtained by steam distillation from the pepper-like fruits tree Litsea cubeba. The EOLC consists of about 29 active compounds. Among them, citral is the main component;the content of citral is nearly 80% of the EOLC. Due to the special function group, citral is easy to react with many chemicals. Thus, EOLC is usually applied as starting material to carry out aldol condensation, reduction, and six-member ring forming reaction. The EOLC is extensively employed to synthesis of geranal nitriles, pseudonoe, ionone, methyl ionone, Vitamin E and Vitamin A. These products are broadly applied in the fields of fragrance, perfume, medicine and so on. This paper presents comprehensive utilization of EOLC as raw materials to synthesize many active chemicals.

Anti-Fatigue Effect of Blended <i>Camellia oleifera Abel</i>Tea Oil and Ge-132 in Mice

Nowadays, people are busier and busier for working and living, and suffer a lot of pressure on their body or mind. Therefore, people are prone to have fatigue activity and decrease their working efficiency and happiness. It was reported that fatigue is a common symptom in the community, with up to half of the general population complaining of fatigue. More and more researchers devoted themselves to studying natural active ingredients in organism as the anti-fatigue drugs to release fatigue symptom. However, these natural ingredients were difficult to obtain from plants, animals and microorganisms by separating and purifying. In addition, some active substances have many side effects. In our study, we employed tea seed oil as main ingredients blended with bis-(carboxyethylgermanium) sesquioxide (Ge-132) to investigate the effects of anti-fatigue on mice by administrating mice with low dose, intermediate dose and high dose of tea seed oil complex for 0, 2 or 4 weeks. The specific tests of studying effects of anti-fatigue were body weight, weight-loaded force swimming, blood urea nitrogen, blood lactic acid and hepaticglycogen. And the results showed that appropriate level of tea seed oil complex could decrease the body weight and prolong the weight-loaded swimming time, and had an active effect on the bloodurea nitrogen, hepatic glycogen and blood lactic acid level mice, which significantly embodied the anti-fatigue activity of tea seed oil complex.

Energy Paths that Sustain the Warm-Sector Torrential Rainfall over South China and Their Contrasts to the Frontal Rainfall: A Case Study

Predicting warm-sector torrential rainfall over South China,which is famous for its destructive power,is one of the most challenging issues of the current numerical forecast field.Insufficient understanding of the key mechanisms underlying this type of event is the root cause.Since understanding the energetics is crucial to understanding the evolutions of various types of weather systems,a general methodology for investigating energetics of torrential rainfall is provided in this study.By applying this methodology to a persistent torrential rainfall event which had concurrent frontal and warm-sector precipitation,the first physical image on the energetics of the warm-sector torrential rainfall is established.This clarifies the energy sources for producing the warm-sector rainfall during this event.For the first time,fundamental similarities and differences between the warm-sector and frontal torrential rainfall are shown in terms of energetics.It is found that these two types of rainfall mainly differed from each other in the lower-tropospheric dynamical features,and their key differences lay in energy sources.Scale interactions(mainly through downscale energy cascade and transport)were a dominant factor for the warm-sector torrential rainfall during this event,whereas,for the frontal torrential rainfall,they were only of secondary importance.Three typical signals in the background environment are found to have supplied energy to the warm-sector torrential rainfall,with the quasi-biweekly oscillation having contributed the most.

Anti-Hypertensive Effects of Blended <i>Camellia oleifera</i>Abel Oil and Eucommia Extract on SHR Mice

In our study, we employed Camellia seed oil as the main ingredients blended with Eucommia Extract to investigate the effects of anti-hypertensive on mice by administrating mice with low dose, middle dose and high dose of Camellia seed oil complex for 4 weeks. The specific tests of studying effects of anti-hypertensive were body weight, blood systolic pressure (BSP), diastolic blood pressure (DBP), pm meam blood pressure (MBP) and heart rate (HR). And the results showed that appropriate level of Camellia seed oil complex could decrease the body weight and had an active effect on the cardiovascular system of mice, which significantly embodied the anti-hypertensive activity of Camellia seed oil complex.

Quasi-Grotthuss mechanism in a nonporous sulphate

The transportation of the proton,the smallest ion in nature,is rudimentary in chemical and biological reactions[1,2],such as photosynthesis[3],enzyme catalysis[4],and Brensted acid/base reactions[5],and currently even imperative in some devices,namely proton exchange membrane fuel cells(PEMFCs)[6,7].The processes of these elementary reactions,like proton transfer,appear to be astonishingly analogous.

Coating of Mineral Acids with Niobic Solid Acid for Preparing Furfural from Nut Shell of Camellia oleifera Abel

Nut shell of Camellia oleifera Abel which has large scale of plantation in mountainous region of southern China is abundant renewable resource. The nut shell is suitable for preparation of furfural, as the content of which is as much as 16% (based the dried nut shell). In early time, mineral acids were employed as typically catalyst for preparing of furfural from the nut shells. These mineral acids could pollute water and corrode equipment. In this paper we used various mineral acids coating with niobic acid as catalysts to investigate reactions for preparation of furfural. Among these catalysts, the catalyst of sulfuric acid coating with niobic acid was found to be very effective, which had higher hammett acidity and better effect of hydrolysis of the nut shells;The catalysts of sulfuric acid coating with niobic acid was characterized, and the conditions of preparation of the catalyst were investigated. The optimum conditions were: sulfuric acid as coating acid, the concentration of sulfuric 1.1 mol/L, impregnation time 8 h, calcination time 8 h and calcination temperature 450°C. Then hydrolysis of the nut shells was explored, the optimum conditions were as follows: dose of catalyst 20%, ratio of solid to liquid 1:15, reaction temperature 100°C, reaction time 4 h;Under this condition, the yield of furfural was 8.7%.

LncRNA MIR31HG controls the proliferation and metastasis of gastric cancer by c-CBL-mediated degradation of β-catenin

LncMIR31HG acts as a host gene for miR-31,also known as LncHIFCAR(long non-coding HIF-1 co-activating RNA),whose deregulation has been reported to promote the development of various human cancers,including lung cancer,colorectal cancer,etc.1,2 However,the biological functions and molecular mechanisms of MIR31HG in gastric cancer are unclear.

In situ construction of ligand nano-network to integrin αvβ3 for angiogenesis inhibition

Angiogenesis occurs during the process of tumor growth,invasion and metastasis,and is essential for the survival of solid tumors.As an integrin significantly ove rexpressed in human tumor vascular endothelial cells,αvβ3 is a suitable targeting site for anti-angiogenesis of tumor.We designed and prepared a selfassembling peptide(SAP)with the ability to targeting αvβ3 and self-assembly.SAP formed nanoparticles in solution and transformed into nanofibrous network once specifically binding to integrin αvβ3 on the surface of human umbilical vein endothelial cells(HUVECs).The SAP network stably anchored on HUVECs over 24h,which consequently resulted in high-efficient inhibition of vascularization.In vitro anti-angiogenesis experiment displayed that the inhibition rate of tube-formation reached 94.9%.In vivo anti-angiogenesis array based on chick chorioallantoic membrane(CAM)model exhibited that the SAP had an inhibition rate up to 63.1%.These results indicated the outstanding anti-angiogenic ability of SAP,potentially for tumor therapy.

个人所得税改革国际发展趋势研究

本文通过分析OECD最新发布的年度报告《税收政策改革(2018):OECD成员国及特定伙伴经济体》1,认为近两年来个人所得税改革的国际趋势主要包括,一些国家持续降低对劳动所得的征税,减轻中低收入者的税负,加强对资本所得的征税,增进税制的包容性,使税收政策在促进经济增长的同时实现社会公平。其后通过比较研究认为,我国个人所得税改革方向与这些趋势基本一致。

降低中低收入劳动者税负 增进税制公平性和包容性——OECD成员国劳动所得税收改革最新发展

自2008年金融危机以来,经济合作与发展组织(OECD)越来越关注各成员国内部以及各国之间在增长、收入以及财富分配方面的持续不平等,鼓励从强调经济增长转到更多地强调包容性,确保增长的福利被更广泛分享。近年来各国税收政策改革当中很重要的一点就是,着重降低中低收入劳动者和家庭的个人所得税负,增进税制的公平性和包容性。本文以OECD在2017年9月发布的研究报告《2017税收政策改革:OECD及某些伙伴经济体》(1)为基础,侧重反映OECD成员国的劳动所得税收状况及其劳动税收政策改革的最新发展趋势。