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Direct transformation of ZIF-8 into hollow porous carbons and hollow carbon composites

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Nano Research 2022年第7期15卷 5769-5774页

作者： Lingqi Huang Zhiyong Luo Wenjie Han Qi Zhang He zhu shiping zhu School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China School of Environmental and Natural Resources Zhejiang University of Science and TechnologyHangzhou 310023China

Hollow porous carbons(HPCs)are a class of porous materials with advantages of high surface to volume ratio,large interior cavities,low density,and short diffusion length,which are promising in various *** carbonization of carbon precursors is the simplest and the most cost-effective method to prepare porous carbons,however,it often leads to non-hollow ***,we demonstrate the preparation of HPCs through a direct carbonization method with a two-step heating process of zeolitic imidazolate framework-8(ZIF-8)and tetrafluoroterephthalonitrile(TFTPN).During the carbonization,ZIF-8 nanoparticles first react with TFTPN at low temperature to create polymer coatings on the surface,which are then converted into HPCs at elevated *** obtained HPCs show hierarchically porous structure with high specific surface areas and pore ***,this method has been adopted to fabricate Au@HPCs yolk–shell composites,exhibiting good catalytic performance in nitrobenzene *** developed synthesis strategy can enrich the toolbox for the preparation of novel HPCs and their composites.

关键词： porous hollow carbon carbonization gold nanoparticles nitrobenzene reduction

Fabrication of metal-organic framework-based nanofibrous separator via one-pot electrospinning strategy

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Nano Research 2021年第5期14卷 1465-1470页

作者： Congcong Chen Weidong Zhang He zhu Bo-Geng Li Yingying Lu shiping zhu State Key Lab of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China Institute of Pharmaceutical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China School of Science and Engineering The Chinese University of Hong KongShenzhenShenzhen518172China Department of Chemical Engineering McMaster UniversityHamiltonOntarioL8S 4L7Canada

Metal-organic framework(MOF)/polymer composites have attracted extensive attention in the recent ***,it still remains challenging to efficiently and effectively fabricate these composite *** this study,we propose a facile one-pot electrospinning strategy for preparation of HKUST-1/polyacrylonitrile(PAN)nanofibrous membranes from a homogeneous stock solution containing HKUST-1 precursors and *** crystallization and polymer solidification occur simultaneously during the electrospinning process,thus avoiding the issues of aggregation and troublesome multistep fabrication of the conventional *** obtained HKUST-1/PAN electrospun membranes show uniform MOF distribution throughout the nanofibers and yield good mechanical *** membranes are used as separators in Li-metal full batteries under harsh testing conditions,using an ultrathin Li-metal anode,a high mass loading cathode,and the HKUST-1/PAN nanofibrous *** results demonstrate significantly improved cycling performance(capacity retention of 83.1%after 200 cycles)under a low negative to positive capacity ratio(N/P ratio of 1.86).The improvement can be attributed to an enhanced wettability of the separator towards electrolyte stemmed from the nanofibrous structure,and a uniform lithium ion flux stabilized by the open metal sites of uniformly distributed HKUST-1 particles in the membrane during cycling.

关键词： one-pot electrospinning strategy metal-organic framework composite nanofibrous membrane battery separator

CclSAUR49对柑橘生长及类柠檬苦素代谢的影响

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园艺学报 2024年第3期51卷 479-494页

作者：易倩张曼曼汪小利冯继鹏朱世平王福生赵晓春西南大学/中国农业科学院柑桔研究所国家柑桔工程技术研究中心重庆400712

SAUR(Small auxin up-regulated RNA)为植物特有的早期生长素响应基因。为了研究柑橘中CclSAUR49参与调节其类柠檬苦素代谢的功能,用湖北早实枳(Poncirus trifoliata Raf.)的上胚轴进行遗传转化,获得6株Ccl SAUR49的过量表达植株(OE1~O... 详细信息

SAUR(Small auxin up-regulated RNA)为植物特有的早期生长素响应基因。为了研究柑橘中CclSAUR49参与调节其类柠檬苦素代谢的功能,用湖北早实枳(Poncirus trifoliata Raf.)的上胚轴进行遗传转化,获得6株Ccl SAUR49的过量表达植株(OE1~OE6)和2株Ccl SAUR49的干扰表达植株(Ri1和Ri2),观察比较转基因和野生型植株的生长表现,利用电镜扫描和半薄切片分别观察叶片的表皮显微结构和组织结构,并检测了叶片中的生长素和类柠檬苦素含量。6个过量表达植株的形态表现存在差异,其中OE2与野生型相比枝梢增长了23.21%,节间数量增多,叶片长度增加了17.97%;2个干扰表达植株(Ri1和Ri2)枝梢生长量减少23.95%和46.82%;2/3过量表达植株的叶片主叶脉直径增大,而Ri2的减小。6株过量表达植株叶片中Ccl SAUR49的表达水平显著上调,是野生型的2.47~73.29倍,2株干扰表达植株叶片中Ccl SAUR49的表达都受到明显抑制,表达水平为野生型的22.66%和47.22%。转基因植株叶片中CclSAUR49的表达水平与其生长素含量呈极显著正相关,与生长素生物合成(YUC6和YUC10)、转运(PIN3)和信号转导(CiARF7和CiARF9)基因的表达水平呈极显著正相关。4个过量表达植株叶片中类柠檬苦素含量降低,1个干扰表达植株(Ri1)叶片中类柠檬苦素含量显著提高。在干扰表达植株中,类柠檬苦素的含量与生长素的含量呈显著负相关。以上结果表明,Ccl SAUR49能促进柑橘植株的生长发育,通过影响生长素的生物合成、转运和信号转导途径上基因的表达调控植物组织中的生长素水平,从而影响类柠檬苦素的代谢。

关键词：柑橘 CclSAUR49 遗传转化生长素类柠檬苦素

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我国蚕桑生产机械化研究进展

中国农机化学报 2024年第9期45卷 318-326页

作者：石洪康陈义安祝诗平李林波张剑飞四川省农业科学院蚕业研究所四川南充637000 西南大学工程技术学院重庆市400700

栽桑养蚕是农业体系中重要的组成部分,机械化生产技术及装备成为目前关注的热点。介绍蚕桑产业的发展现状,列举家蚕饲育和制种环节的主要农艺及特点。总结桑园管理、家蚕饲育、蚕茧采收与分选、家蚕制种等方面的机械化研究进展。对蚕桑... 详细信息

栽桑养蚕是农业体系中重要的组成部分,机械化生产技术及装备成为目前关注的热点。介绍蚕桑产业的发展现状,列举家蚕饲育和制种环节的主要农艺及特点。总结桑园管理、家蚕饲育、蚕茧采收与分选、家蚕制种等方面的机械化研究进展。对蚕桑生产机械化发展进行分析,指出目前存在产业链长,需要的机械种类多;农艺复杂,机械研发难度大;家蚕生命周期短,样机试验受限等问题。给出对应的建议,包括开展多功能桑园管理和特有养殖装备研究;注重宜机化研究,推动农机与农艺的深度融合;建立家蚕机械化养殖示范基地,研究蚕桑机械化生产技术等方面。

关键词：蚕桑桑园管理机械养蚕机械工厂化养殖

城市双层河道流量过程模拟——以清华大学校河南支为例

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中国防汛抗旱 2024年第8期34卷 42-46页

作者：汪鑫曹雪健李瑞栋朱世平清华大学修缮校园管理中心北京100084 清华大学水圈科学与水利工程全国重点实验室北京100084 水利部水利水电规划设计总院北京100120 无锡航征科技有限公司感知技术研究院无锡214135

城市双层河道通过装备各类水利设施综合调配水流,可实现河道行洪、雨水资源利用、生态基流保障等多个目标,兼顾安全性和亲水性两个方面。但与此同时,双层河道在横—纵—侧各个维度上表现出相比于传统河道更为复杂的水力联系,给数值建模... 详细信息

城市双层河道通过装备各类水利设施综合调配水流,可实现河道行洪、雨水资源利用、生态基流保障等多个目标,兼顾安全性和亲水性两个方面。但与此同时,双层河道在横—纵—侧各个维度上表现出相比于传统河道更为复杂的水力联系,给数值建模和流量模拟带来了挑战。目前围绕城市双层河道流量过程模拟的研究依然较少。以清华大学校河南支排水区为研究对象,考虑闸、孔、堰、泵等各种水利工程设施,构建了城市双层河道水流模拟模型,并以校园小型气象站降雨观测数据为驱动,对校河南支末端节制闸前水深变化过程和闸后流量过程进行了模拟。结果表明,所建模型可以较好模拟双层河道流量过程,具有较高的可信度。

关键词：城市雨洪双层河道流量模拟精细化建模

Selenized liposomes with ameliorative stability that achieve sustained release of emodin but fail in bioavailability

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Chinese Chemical Letters 2023年第1期34卷 235-238页

作者： Mujuan zhu shiping zhu Qiubo Liu Yuehong Ren Zhiguo Ma Xingwang Zhang Department of Pharmaceutics School of PharmacyJinan UniversityGuangzhou 511443China Department of Chinese Traditional Medicine/Sun-Shengyun Heritage Studio of Eminent TCM Practitioner in Guangdong Province The First Affiliated Hospital of Jinan UniversityGuangzhou 510630China

Stability of liposomes plays a crucial role in drug delivery,especially in oral *** structural modification of liposomes has been the orientation of efforts to improve their stability and enable the controllability of payload *** study reported a selenylation strategy to optimize the liposomal structure in an attempt to enhance the nanocarrier’s stability,hence the bioavailability of emodin(EM),an active compound with poor ***-loaded selenized liposomes(EM-Se@LPs)were prepared by thin film dispersion followed by in situ reduction *** results showed that EM-Se@LPs were provided with enhancive gastrointestinal stability and exhibited sustained release of drug compared with EM-loaded liposomes(EM-LPs).However,the modified liposomes with Se depositing onto the interior and exterior bilayers did not substantially facilitate absorption of *** reinforced structure of liposomes irrelevant to absorption was affirmed to be due to good stability and absorbability of EM ***,the present work provides an alternative option for stabilization of liposomes instead of conventional methods,which may be promising for oral delivery of physiologically unstable and/or poorly absorbed drugs and systemic drug delivery.

关键词： Emodin Liposomes Selenium Stability Sustained release Bioavailability

CA-YOLOv5: Detection model for healthy and diseased silkworms in mixed conditions based on improved YOLOv5

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International Journal of Agricultural and Biological Engineering 2023年第6期16卷 236-245页

作者： Hongkang Shi Wenfu Xiao shiping zhu Linbo Li Jianfei Zhang College of Engineering and Technology Southwest UniversityChongqing 400700China Sericultural Research Institute Sichuan Academy of Agricultural SciencesNanchong 637000SichuanChina Yibin Academy of Southwest University Yibin 644000SichuanChina State Key Laboratory of Resource Insects Southwest UniversityChongqing 400700China

The accurate identification and localization of diseased silkworms is an important task in the research of disease precision control technology and equipment development in the sericulture industry. However, the existing deep learning-based methods for this task are mainly based on image classification, which fails to provide the location information of diseased silkworms. To this end, this study proposed an object detection-based method for identifying and locating healthy and diseased silkworms. Images of mixed healthy and diseased silkworms were collected using a mobile phone, and the category and location of each silkworm were labeled using LabelImg as a labeling tool to construct an image dataset for object detection. Based on the one-step detection model YOLOv5s, the ConvNeXt-Attention-YOLOv5 (CA-YOLOv5) model was designed in which the large kernel with depth-wise separable convolution (7×7 dw-conv) of ConvNeXt was adopted to expand receptive fields and the channel attention mechanism ECANet was added to enhance the capability of feature extraction. Experiments showed that the mean average precision (mAP) values of CA-YOLOv5 for healthy and diseased silkworms reached 96.46%, which is 1.35% better than that achieved via YOLOv5s. At the same time, the overall performance of CA-YOLOv5 was significantly better than state-of-the-art one-step models, such as Single Shot MultiBox Detector (SSD), CenterNet, and EfficientDet, and even improved YOLOv5 using image attention mechanism and a lightweight backbone, like SENet-YOLOv5 and MobileNet-YOLOv5. The results of this study can provide an important basis for the accurate positioning of diseased silkworms in precision disease control technology and equipment development.

关键词： diseased silkworm detection YOLOv5 mixed conditions image attention mechanism object detection

Unusual switching of ionic conductivity in ionogels enabled by water-induced phase separation

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聚集体(英文)

聚集体(英文) 2023年第1期4卷 210-218页

作者： Le Yao Xiaoqing Ming Chengjiang Lin Xiaozheng Duan He zhu shiping zhu Qi Zhang School of Science and Engineering Chinese University of Hong KongShenzhenGuangdongP.R.China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchunJilinP.R.China

Developing smart iontronic materials is highly desired for eradicating the widely occurring potential short-circuit hazard and subsequent safety problems caused by high ambient *** this work,a humidity-responsive ionogel(HRIG)based on a poly(benzyl methacrylate)matrix swollen by hydrophobic ionic liquid and hygroscopic lithium salt is *** HRIG exhibits an anomalous decrease in ionic conductivity upon hydration by increased humidity,totally differing from traditional ionic conductors,which are usually more conductive due to the plasticizing effect of water *** unique ionogel shows a dramatic decrease in ionic conductivity(as much as 10^(2))when exposed to *** conductive pathway within the HRIG would be shut down spontaneously above a critical relative humidity due to water-induced phase ***,this transition can be perfectly reversed when the ambient humidity drops.A humidity-responsive smart supercapacitor that can be switched on and off by capturing humidity changes is designed for *** is believed that such unusual HRIG material will provide new insights into the development and applications of smart iontronics.

关键词： humidity-responsive ionic liquid polymer gel ionic conductivity phase separation

Bioinformatics Analysis of the Regulatory lncRNA–miRNA–mRNA Network and Drug Prediction in Patients with Pulmonary Arterial Hypertension

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Cardiology Discovery 2023年第2期3卷 85-94页

作者： Xiao Jin Ling Jin Li Han shiping zhu Department of Traditional Chinese Medicine The First Affiliated Hospital of Jinan UniversityGuangzhouGuangdong 510630China.

Objective:Pulmonary arterial hypertension(PAH)is a cardiovascular disease caused by primary proliferative lesions in pulmonary *** endogenous RNAs(ceRNAs)have been reported to act as sponges for microRNAs(miRNAs).To date,however,the mechanisms underlying ceRNA involvement in PAH have not been *** study aimed to construct a PAH-related ceRNA network to further explore the mechanisms of ***:A probe reannotation was conducted to identify the long non-coding RNAs(lncRNAs)and messenger RNAs(mRNAs)involved in *** on the reannotation results,the“limma”package was used to identify the differentially expressed genes(DEGs)and *** miRcode database was used to predict the lncRNA–miRNA ***,the mRNAs targeted by the miRNAs were predicted by using TargetScan,miRTarBase,and *** on the above interactions,a ceRNA network was constructed,which was mapped and visualized with Cytoscape 3.6.1 *** Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses were performed using the *** predict possible drugs or molecules that may mitigate PAH,C-Map analysis was applied to find relevant molecular compounds that can reverse the expression of DEGs in cell ***:The ceRNA network consisted of 174 nodes and 304 links,which included 10 lncRNAs,23 miRNAs,and 53 *** hub genes of the ceRNA network for PAH included hsa-miR-17-5p,hsa-miR-20b-5p,MEG3,HCP5,hsa-miR-27a-3p,hsa-miR-107,hsa-miR-142-3p,hsa-miR-363-3p,hsa-miR-301b-3p,and ***,irinotecan,and medrysone were found to be the 3 significant ***:This study found that hsa-miR-17-5p,hsa-miR-20b-5p,MEG3,HCP5,hsa-miR-27a-3p,hsa-miR-107,hsa-miR-142-3p,hsa-miR-363-3p,hsa-miR-301b-3p,and hsa-miR-23b-3p maybe the underlying biomarkers and targets for diagnosis and treatment of PAH.

关键词： Pulmonary arterial hypertension Competing endogenous RNAs Bioinformatics analysis