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Efficient photocatalytic biomass-alcohol conversion with simultaneous hydrogen evolution over ultrathin 2D NiS/Ni-CdS photocatalyst

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Chinese Chemical Letters 2024年第7期35卷 422-427页

作者： Zongyi Huang Cheng Guo Quanxing Zheng Hongliang Lu Pengfei Ma zhengzhong Fang Pengfei Sun Xiaodong yi Zhou Chen State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Materials Key Laboratory of High Performance Ceramic Fibers(Xiamen University)Ministry of EducationXiamen UniversityXiamen 361005China Technology Center China Tobacco Fujian Industrial Co.Ltd.Xiamen 361021 China

The photocatalytic conversion of biomass into high-value chemicals,coupled with simultaneous hydrogen(H_(2))evolution,leveraging the electrons and holes generated by solar energy,holds great promise for addressing energy *** this study,we constructed a dual functional photocatalytic system formed by NiS loaded on Ni doped two-dimensional(2D)CdS nanosheet(NiS/Ni-CdSNS)heterostructure for visible-light-driven H_(2)evolution and ethanol oxidation to ***,the 2D NiS/NiCdSNS exhibited significant activity and selectivity in both photocatalytic H_(2)evolution and ethanol oxidation,achieving yields of 7.98 mmol g^(-1)h^(-1)for H_(2)and 7.33 mmol g^(-1)h^(-1)for *** heterogeneous interface of the composite facilitated efficient charge separation,while NiS provided abundant sites for proton reduction,thereby promoting the overall dual-functional photocatalytic *** functional theory calculations further reveal that both Ni doping and NiS loading can reduce the reaction energy barrier of ethanol oxidation of free radicals,and NiS/Ni-CdSNS composite materials exhibit stronger ethanol C-H activation ability to generate key intermediate·CH(OH)CH_(3)on the *** work serves as a valuable guide for the rational design of efficient dual functional photocatalytic systems that combine H_(2)evolution with the selective conversion of organic compounds into high-value chemicals.

关键词： Photocatalysis Biomass-alcohol oxidation H_(2)evolution Dual-functional catalysis

Anemarsaponin B mitigates acute pancreatitis damage in mice through apoptosis reduction and MAPK pathway modulation

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BIOCELL 2024年第5期48卷 745-758页

作者： yi HU ZHONGYANG REN zhengzhong ZHAO YONGJIA HUANG WANTING HUANG JIE LIU LING DING Gastroenterology Department Chongqing University Jiangjin HospitalJiangjin Central Hosptial of ChongqingChongqingChina Surgical Department Chongqing Jiangjin District Hospital of Chinese MedicineChongqingChina Pharmacy Department Chongqing University Jiangjin HospitalJiangjin Central Hosptial of ChongqingChongqingChina

Background:Acute pancreatitis(AP),known for its rapid onset and significant incidence and mortality rates,presents a clinical challenge due to the limited availability of effective treatments and preventive *** B(ASB)has emerged as a potential therapeutic agent,demonstrating capabilities in reducing immune inflammation,positioning it as a promising candidate for AP ***:We investigated the effects of ASB on AP in mice,induced by caerulein and lipopolysaccharide(LPS).Peripheral blood samples were collected 24 h post-induction with caerulein to assess of key biomarkers including lipase,amylase,TNF-α,IL-1β,IL-6,SOD,and GSH-Px.A range of techniques such as immunohistochemistry staining,immunofluorescence staining,Western blotting,and quantitative Polymerase Chain Reaction(q-PCR),were employed to measure the expression of critical ***,pancreas samples from the mice were harvested for microbiome and metabolome sequencing,with the data analyzed to understand the impact of ASB on ***:Our study revealed that,compared to the sham group,the AP group exhibited significantly higher serum levels of lipase,amylase,and cytokines,while levels of SOD and GSH Px were notably *** with ASB led to a substantial decrease in the levels of lipase,amylase,and cytokines,and an increase in SOD and GSH-Px levels.q-PCR analysis of pancreatic histiocytes corroborated these serum *** and Eosin(H&E)staining indicated significant alterations in the pathological changes in the pancreas,lungs,and small intestine of the AP model due to *** assays demonstrated that ASB alleviated the apoptosis of pancreatic histiocytes in the AP *** Blot and histological analyses showed that ASB reduced the phosphorylation of TAK,p38,JNK,and ERK proteins,as well as the levels of TRAF6 protein in the AP ***,metabolomic and gut microbiota analysis identified 27 differential metabolites and 34 diffe

关键词： Anemarsaponin B Acute pancreatitis Cytokines MAPK TRAF6 Gut flora

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人工模拟降雨格局变化对红砂种子萌发的影响

生态学报 2017年第16期37卷 5382-5390页

作者：单立山李毅张正中白蕾段桂芳种培芳甘肃农业大学林学院兰州730070

气候变化改变降雨格局,会影响到种子出苗及幼苗生长,进而影响幼苗的更新动态。为探讨降雨格局变化对典型荒漠植物红砂种子萌发特性的影响,利用环境控制生长箱开展了降雨量和降雨间隔时间的双因素控制实验。结果表明:(1)总降雨量增加30%... 详细信息

气候变化改变降雨格局,会影响到种子出苗及幼苗生长,进而影响幼苗的更新动态。为探讨降雨格局变化对典型荒漠植物红砂种子萌发特性的影响,利用环境控制生长箱开展了降雨量和降雨间隔时间的双因素控制实验。结果表明:(1)总降雨量增加30%,红砂种子出苗率和发芽势分别平均提高45.69%、39.86%(P0.05)。(3)降雨量增加30%延长降雨间隔时间处理加快了红砂的萌发进程,缩短了种子的萌发持续时间,其萌发曲线较陡峭。降雨量减少30%对其种子萌发进程影响不大。该研究得到以下主要结论:1)红砂种子萌发主要受到降雨量的影响,但降雨量效应依赖降雨间隔时间,总降雨量一定降雨间隔延长所形成的单次降雨量增加均提高萌发率,增加了红砂繁殖成功率,对其幼苗更新起促进效应;2)在自然状态及降雨减少的情况下红砂种子具有推迟萌发的特性,使其幼苗在更适宜的环境条件下出现和生长的机会增多,从而提高植物对环境的长期适应性。

关键词：降雨间隔时间降雨量种子萌发幼苗更新

不同贮藏年限对红砂种子生理特性及胚结构的影响

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西北农业学报 2024年第1期33卷 99-107页

作者：李蒙苏世平张正中李超群陈君婵李毅甘肃农业大学林学院兰州730070

以室温贮藏条件下0~4 a的红砂(Reaumuria soongorica)种子为试验材料,通过测定不同贮藏年限红砂种子的萌发指标、生理指标及种胚显微结构,探究红砂种子在贮藏老化过程中种子活力及其生理和显微结构的变化特征。结果表明:随着贮藏年限的... 详细信息

以室温贮藏条件下0~4 a的红砂(Reaumuria soongorica)种子为试验材料,通过测定不同贮藏年限红砂种子的萌发指标、生理指标及种胚显微结构,探究红砂种子在贮藏老化过程中种子活力及其生理和显微结构的变化特征。结果表明:随着贮藏年限的增加,红砂种子芽长、萌发率、萌发势、发芽指数、活力指数和含水量逐渐降低,超氧化物歧化酶(superoxide dismutase,SOD)活性、可溶性糖(soluble sugar,SS)和可溶性蛋白(soluble protein,SP)含量呈先升高后降低的趋势,丙二醛(malondialdehyde,MDA)含量逐渐上升。红砂种子萌发指标与MDA含量呈显著(P<0.05)负相关,与SS、SP呈正相关。当年采收的种子,胚部细胞排列紧密,贮藏3~4 a的种子胚部细胞排列散乱,木质化程度加深着色效果明显,并伴随子叶逐渐缩小的现象。综上认为,红砂种子含水量、MDA和SP含量可较为准确地反映其活力,且红砂种子活力变化的节点在2~3 a之间。在实际生产中,建议选择采收后室温贮藏1 a的种子为播种材料。

关键词：红砂种子贮藏年限种子活力生理指标种胚显微结构

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Precipitation amount and frequency affect seedling emergence and growth of Reaumuria soongarica in northwestern China

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Journal of Arid Land 2018年第4期10卷 574-587页

作者： SHAN Lishan ZHAO Wenzhi LI yi ZHANG zhengzhong XIE Tingting Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences College of Forestry Gansu Agricultural University

Climate change is shifting the amount and frequency of precipitation in many regions, which is expected to affect seedling recruitment across ecosystems. However, the combined effects of precipitation amount and frequency on seedling recruitment remain largely unknown. An understanding of the effects of precipitation amount and frequency and their interaction on seedling emergence and growth of typical desert plants is vital for managing populations of desert plants. We conducted two experiments to study the effects of variation in precipitation on Reaumuria soongarica （Pall.） Maxim. First, greenhouse experiments were conducted to examine the effects of three precipitation amount treatments （ambient, ＋30%, and -30%） and two precipitation frequency treatments （ambient and -50%） on seedling emergence. Second, the morphological responses of R. soongarica to changes in precipitation amount and frequency were tested in a controlled field experiment. Stage-specific changes in growth were monitored by sampling in different growth seasons. Our results showed that precipitation amount significantly affected germination, seedling emergence, and growth of R. soongarica, and there was a larger effect with decreased precipitation frequency compared with ambient. Germination and seedling emergence increased as precipitation increased under the same frequency of precipitation. The highest emergence percentage was obtained with a 30% increase in precipitation amount and a 50% reduction in precipitation frequency. Compared with ambient precipitation, a 30% increase in precipitation amount increased above- and below-ground biomass accumulation of R. soongarica during the growth season. A decrease of 30% in precipitation amount also resulted in an increase in below-ground biomass and root/shoot ratio in the early stages of the growth season, however, above- and below-ground biomass showed the opposite results at the end of the growth season, with larger effects on above-ground than be

关键词： precipitation patterns seedling emergence biomass root/shoot ratio seedling recruitment

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芸薹根肿菌生理小种鉴定与检测方法研究进展

微生物学通报 2024年第9期51卷 3348-3371页

作者：余红瑞章艺张舒晴 HUSSAIN Iqbal 董正中雷娜门万杰余小林浙江大学蔬菜研究所浙江杭州310058 浙江大学新农村发展研究院浙江杭州310058 哈尔滨市农业科学院黑龙江哈尔滨150086

根肿病是由芸薹根肿菌(Plasmodiophora brassicae Woronin)引起的全球性土传病害,对十字花科芸薹属作物的产量和质量构成了严重的威胁。根肿菌为专性活体寄生菌,具有强烈的生理小种分化现象,因此,对不同地区的生理小种类型进行评估,有... 详细信息

根肿病是由芸薹根肿菌(Plasmodiophora brassicae Woronin)引起的全球性土传病害,对十字花科芸薹属作物的产量和质量构成了严重的威胁。根肿菌为专性活体寄生菌,具有强烈的生理小种分化现象,因此,对不同地区的生理小种类型进行评估,有利于芸薹属作物的抗性育种及作物栽培的整体规划。精确评估土壤中芸薹根肿菌休眠孢子的数量,有助于准确预测田块中根肿病发生的风险水平,可为后续防治方法的选择和防治效果的评估奠定基础。本文对芸薹根肿菌生理小种的鉴定以及土壤中根肿菌休眠孢子的检测和定量方法进行了简要综述,同时提出了一种有望应用于根肿菌生理小种研究的单细胞测序技术,并对重组酶聚合酶扩增技术(recombinase polymerase amplification,RPA)在根肿菌检测与定量方面的可行性进行了分析。本文旨在为根肿病的高效防控提供理论依据和方法参考,同时为根肿菌鉴定与检测方法的研究提供新的研究思路和解决方案。

关键词：根肿病芸薹根肿菌生理小种根肿病鉴别系统定量方法

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我国盐穴资源评价及调查技术研究

水文地质工程地质 2024年第4期51卷 53-65页

作者：林振洲刘东明张乐蒋正中荆磊智庆全张杰周岳军贾定宇杨毅梁明星李洋欧洋翟景红中国地质科学院地球物理地球化学勘查研究所河北廊坊065000 国家现代地质勘查工程技术研究中心河北廊坊065000 中盐勘察设计院有限公司湖南长沙410027

在“双碳”目标大背景下,盐穴是实现地质储能、碳封存的重要方式之一,但我国盐穴资源数量、质量不明,盐穴调查技术体系不完善,严重制约盐穴资源开发利用。通过分析我国主要盐矿区地质勘探报告、储量核实报告、企业年报及文献报道等,形... 详细信息

在“双碳”目标大背景下,盐穴是实现地质储能、碳封存的重要方式之一,但我国盐穴资源数量、质量不明,盐穴调查技术体系不完善,严重制约盐穴资源开发利用。通过分析我国主要盐矿区地质勘探报告、储量核实报告、企业年报及文献报道等,形成了我国盐穴资源数量、可利用性的科学认识和基本判断;在盐穴集中区开展综合探测技术试验并结合前人试验成果,初步构建了盐穴资源调查技术体系。结果表明:(1)我国盐穴资源丰富,储量大、分布广、埋深适宜、具备规模化开发利用条件,其中华东和华中地区已有盐穴资源最为丰富。(2)通过建立盐穴资源可利用性评价体系,将全国盐穴资源分为Ⅰ、Ⅱ、Ⅲ3级,Ⅰ级已有盐穴资源占比约29.4%,主要分布在华东、华中地区的江苏、湖北、河南等省份,是开发利用的优选区;Ⅱ级已有盐穴资源占比约65.4%,广泛分布于华中、西北和西南地区,可作为开发利用远景区;Ⅲ级已有盐穴资源占比约5.2%,整体地质条件不适宜开发利用。(3)地面物探可查明盐矿区区域地质、盐层地质、水文地质及盐腔分布情况,指导盐穴建库选址;井中物探精度高,可获取盐矿品味、腔体结构等信息,服务储库建设及运行监测。研究结果可为我国盐穴资源规划及开发提供基础数据和技术支撑。

关键词：岩盐矿盐穴可利用评价调查技术地球物理探测

某过断层深埋高水头TBM输水隧洞围岩-支护结构响应规律

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水利与建筑工程学报 2024年第3期22卷 28-35页

作者：刘媛刘彪许建建王正中赵玮刘铨鸿焦琳敬熠陕西省水利电力勘测设计研究院陕西西安710001 西北农林科技大学水利与建筑工程学院陕西杨凌712100

为了研究过断层深埋高水头敞开式TBM输水隧洞支护结构的响应规律,对不同支护方案下某过断层深埋高水头敞开式TBM隧洞围岩与支护结构的响应规律进行对比分析,选出最合适的支护设计方案。建立TBM隧洞动态开挖-支护精细仿真模型,逐个研究... 详细信息

为了研究过断层深埋高水头敞开式TBM输水隧洞支护结构的响应规律,对不同支护方案下某过断层深埋高水头敞开式TBM隧洞围岩与支护结构的响应规律进行对比分析,选出最合适的支护设计方案。建立TBM隧洞动态开挖-支护精细仿真模型,逐个研究动态开挖-支护中围岩、锚杆、钢拱架、初喷混凝土、二衬的响应规律。结果表明:依次支护管棚、锚杆、钢拱架、固结灌浆、衬砌后,围岩拱顶变形分别降为不支护时的59.4%、32.9%、32.9%、4.1%、3.2%。盾尾离开后各响应突增,增幅逐步减缓且最终趋于稳定,衬砌支护后突降并稳定。锚杆应力分布不均,支护后拱腰处锚杆应力比拱顶增加快,各锚杆应力越靠近洞壁处越大。管棚+锚杆+钢拱架+固结灌浆+初喷+二衬可保证安全,但需固结围岩弹性模量、黏聚力及内摩擦角分别提高1.0、1.0、0.21倍。

关键词：深埋高水头输水隧洞断层敞开式TBM 开挖-支护结构响应

金莲花总黄酮腹腔注射对大鼠脑缺血再灌注损伤的治疗作用及其机制

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山东医药 2024年第17期64卷 43-47页

作者：廖正忠张丹王德昌何磊易斯坐杨利强昆明卫生职业学院基础医学院昆明650600

目的观察金莲花总黄酮腹腔注射对大鼠脑缺血再灌注损伤的治疗作用并探讨其机制。方法雄性SD大鼠随机分为假手术组、模型组、金莲花总黄酮组、铁死亡抑制剂组,每组18只。除假手术组外,各组均采用线栓法制作大鼠大脑中动脉阻塞模型;假手... 详细信息

目的观察金莲花总黄酮腹腔注射对大鼠脑缺血再灌注损伤的治疗作用并探讨其机制。方法雄性SD大鼠随机分为假手术组、模型组、金莲花总黄酮组、铁死亡抑制剂组,每组18只。除假手术组外,各组均采用线栓法制作大鼠大脑中动脉阻塞模型;假手术组手术操作与模型组基本相同但未插线栓。金莲花总黄酮组、铁死亡抑制剂组在造模完成后分别腹腔注射金莲花总黄酮及铁死亡抑制剂Lip-1,假手术组、模型组腹腔注射等量生理盐水,连续给药3 d,每天1次。采用Longa评分法对大鼠的神经功能缺损进行评分,TTC染色测算脑组织梗死体积百分比,比色法检测脑组织氧化应激指标活性氧(ROS)、丙二醛(MDA)、谷胱甘肽过氧化物酶(GSH-Px),Western blotting法检测脑组织铁死亡相关蛋白谷胱甘肽过氧化物酶4(GPX4)、长链脂酰辅酶A合成酶(ACSL4)、转铁蛋白受体1(TFR1)、膜铁转运蛋白1(Ferroportin-1)。结果神经功能缺损评分、脑梗死体积百分比模型组>金莲花总黄酮组、铁死亡抑制剂组>假手术组(P均金莲花总黄酮组、铁死亡抑制剂组>假手术组,GSH-Px含量假手术组>金莲花总黄酮组、铁死亡抑制剂组>模型组(P均金莲花总黄酮组、铁死亡抑制剂组、假手术组(P均<0.05)。结论金莲花总黄酮腹腔注射对大鼠脑缺血再灌注损伤具有一定的治疗作用,其机制可能与抑制脑组织铁死亡有关。

关键词：金莲花总黄酮缺血再灌注损伤脑缺血铁死亡氧化应激

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