绿色金融促进农业高质量发展研究

本文研究绿色金融对农业高质量发展的促进作用,综合分析了我国绿色农业发展现状和绿色金融对农业高质量发展的作用。通过深入了解两者之间的关联关系及耦合情况并构建实证模型,指出我国绿色金融在促进农业高质量发展中存在的问题。针对这些问题提出针对性的建议,从而为促进我国农业高质量发展的转型升级提供经验借鉴。

Recentadvancesincarbon‐basedmaterials for solar‐driven interfacial photothermal conversion water evaporation:Assemblies,structures,applications,and prospective

The shortage of fresh water in the world has brought upon a serious crisis to human health and economic development.Solar‐driven interfacial photothermal conversion water evaporation including evaporating seawater,lake water,or river water has been recognized as an environmentally friendly process for obtaining clean water in a low‐cost way.However,water transport is restricted by itself by solar energy absorption capacity's limits,especially for finite evaporation rates and insufficient working life.Therefore,it is important to seek photothermal conversion materials that can efficiently absorb solar energy and reasonably design solar‐driven interfacial photothermal conversion water evaporation devices.This paper reviews the research progress of carbon‐based photothermal conversion materials and the mechanism for solar‐driven interfacial photothermal conversion water evaporation,as well as the summary of the design and development of the devices.Based on the research progress and achievements of photothermal conversion materials and devices in the fields of seawater desalination and photothermal electric energy generation in recent years,the challenges and opportunities faced by carbon‐based photothermal conversion materials and devices are discussed.The prospect of the practical application of solar‐driven interfacial photothermal conversion evaporation technology is foreseen,and theoretical guidance is provided for the further development of this technology.

Effects of T-S wave amplitude on the control of boundary layer transition by streaks

The effects of streaks on boundary layer transition depend on the initial amplitude of T-S waves introduced to excite the transition. This problem was studied in a flat-plate boundary layer in water tunnel by using hydrogen bubble method. Three T-S wave initial amplitudes were tested. The results show that both narrow and wide-spacing streaks depress the transition excited by T-S waves with lower initial amplitude. However, when transition is excited by T-S waves of higher initial amplitude, the narrow-spacing streaks depress the transition, while the wide-spacing streaks promote the transition. Futrther the underlying mechanisms were also analyzed.

A Cost-Effective Co-precipitation Method for Synthesizing Indium Tin Oxide Nanoparticles without Chlorine Contamination

Indium tin oxide （ITO） nanoparticles with crystallite size of 12.6 nm and specific surface area of 45.7 m 2 ·g-1 were synthesized by co-precipitation method.The indium solution was obtained by dissolving metal indium in HNO3.The tin solution was obtained by dissolving metal tin in HNO3 and followed by stabilizing with citric acid.The free of chlorine ions in the synthesis process brought several advantages：shortening the synthesis time,decreasing the particle agglomeration,decreasing the chlorine content in the ITO nanoparticles and improving the particle sinterability.This is the first time to report the synthesis of ITO nanoparticles free from chlorine contamination without using the expensive metal alkoxides as starting materials.

dlt操纵子赋予苏云金芽胞杆菌对阳离子抗菌肽的抗性和对昆虫的毒力（英文）

【目的】革兰氏阳性菌中的dlt操纵子编码细胞壁中磷壁酸发生D-丙氨酰化修饰所必需的酶。D-丙氨酰化使细胞表面产生正电荷,并因此排斥带正电的分子,例如阳离子抗菌肽,从而赋予对宿主的抗性。本文中,我们研究了dlt操纵子对苏云金芽胞杆菌表型性状的影响及在对昆虫毒力中发挥的作用。【方法】通过同源重组构建了Δdlt ABt基因缺失突变株,并对其进行形态学观察、表面电荷差异分析、抗逆性分析和毒力测定。【结果】结果表明,dlt A的失活显著降低了细胞表面的净负电荷,对阳离子抗菌肽(多粘菌素B和溶菌酶)的抗性和碱耐受性显著下降。同时,Δdlt ABt的生长曲线发生明显改变,细胞表面粗糙且形状不规则,生物膜形成减少和群游运动能力增强。此外,dlt A的失活降低了对昆虫中肠上皮细胞的粘附能力,并减弱了对家蚕的毒力。【结论】研究结果表明,dlt操纵子介导的磷壁酸发生D-丙氨酰化修饰与苏云金芽胞杆菌的许多表型性状密切相关,并且在苏云金芽胞杆菌对昆虫的致病性及抵抗昆虫体液免疫保护中具有重要作用。