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Combined antibacterial and antibiofilm activity of phenyllactic acid and bacteriocin XJS01 against Shigella flexneri

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Food Bioscience 2022年第1期45卷 266-273页

作者： yu-Hang jiang Lin-yu Yang Wei-Gang Xin qi-Lin Zhang Faculty of Life Science and Technology Kunming University of Science and TechnologyYunnan Kunming650500China

This study investigated antibacterial and antibiofilm activity of the combined use of phenyllactic acid(PLA)and bacteriocin XJS01 against Shigella flexneri_*** minimum inhibitory concentration(MIC)of PLA and XJS01 against ***_14 was 2.45 mg/mL and 18.75μg/mL,*** and kill kinetics assays showed that the combined use of 1/2MIC PLA plus 1/2MIC XJS01 had a better activity against planktonic ***_14 compared to treatment with PLA and XJS01 used singly(1/2MIC and 2MIC).Cellular biochemical and morphological analysis revealed the remarkable ability of the combination in disrupting cell appearance and promoting deformation of planktonic ***_14 compared to single ***,***_14 biofilm formation was inhibited and degraded by the combination,which showed a more remarkable antibiofilm activity than PLA and XJS01 when used *** study demonstrates the synergistic antibacterial activity of PLA and XJS01 against ***_14 in either planktonic or biofilm states in foods.

关键词： Foodborne pathogenic bacteria Shigella flexneri Bacteriocin Phenyllactic acid Synergistic antibacterial activity Antibiofilm activity

X射线透视引导下不同方式建立兔椎间盘退变模型的结果对比

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中国组织工程研究 2025年第5期29卷 995-1002页

作者：丁至立黄杰蒋强李土胜刘江丁宇安徽医科大学海军临床学院北京市100048 安徽医科大学第五临床医学院安徽省合肥市230032 解放军总医院第六医学中心中医医学部骨伤科北京市100048

背景:国内外学者认为新西兰大白兔腰椎解剖形态与人类腰椎更为相似,是理想的模型动物。在X射线引导下采用不同方式建立兔椎间盘退变模型目前尚缺乏系统性比较。目的:基于X射线引导采用针刺法、终板注射法以及改良终板注射法建立兔腰椎... 详细信息

背景:国内外学者认为新西兰大白兔腰椎解剖形态与人类腰椎更为相似,是理想的模型动物。在X射线引导下采用不同方式建立兔椎间盘退变模型目前尚缺乏系统性比较。目的:基于X射线引导采用针刺法、终板注射法以及改良终板注射法建立兔腰椎间盘退变模型,比较3种方法造模的效果。方法:6月龄新西兰大白兔16只随机分为4组,分别为针刺组、终板注射组、改良终板注射组及空白对照组,针刺组对3个连续节段(L2/3、L3/4、L4/5)椎间盘进行针刺造模,终板注射组在3个连续节段终板单点注射50μL无水乙醇,改良终板注射组对3个连续节段椎间盘进行针刺并在相应节段终板4个方位点注射50μL无水乙醇,空白对照组不进行干预。术后2,4,8周进行X射线检查,测量椎间隙高度指数,然后取椎间盘组织进行解剖学观察、病理学检查。结果与结论:①解剖学观察显示,针刺组以纤维环破溃为主要表现,终板注射组主要以髓核退变为主要表现,改良终板注射组以全椎间盘结构紊乱为主要表现;②与空白对照组相比,针刺组术后2周椎间隙高度指数降低最明显,终板注射组术后2,4周椎间隙高度指数降低明显,改良终板注射组术后2,4,8周椎间隙高度指数均显著降低;③病理学检查显示,针刺组纤维环结构出现破损,内层纤维环向内凸入,终板注射组表现为终板裂隙、排列混乱及细胞核丢失,改良终板注射组表现为整体椎间盘结构紊乱,髓核失水皱缩,与破损的纤维环无明显边界。结果表明,针刺法、终板注射法及改良终板注射法均能建立兔椎间盘退变模型,改良终板注射法较单一方法可大幅加快并加重椎间盘退变,可有效缩短实验周期。

关键词：组织工程椎间盘退变纤维环穿刺法终板注射法 X射线新西兰大白兔

Certificateless threshold signature from lattice

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Digital Communications and Networks 2024年第4期10卷 965-972页

作者： Huifang yu qi Zhang School of Cyberspace Security Xi'an University of Posts and TelecommunicationsXi'anChina

Threshold signature has been widely used in electronic wills,electronic elections,cloud computing,secure multiparty computation and other *** now,certificateless threshold signature schemes are all based on traditional mathematic theory,so they cannot resist quantum computing *** view of this,we combine the advantages of lattice-based cryptosystem and certificateless cryptosystem to construct a certificateless threshold signature from lattice(LCLTS)that is efficient and resistant to quantum algorithm *** has the threshold characteristics and can resist the quantum computing attacks,and the analysis shows that it is unforgeable against the adaptive Chosen-Message Attacks(UF-CMA)with the difficulty of Inhomogeneous Small Integer Solution(ISIS)*** addition,LCLTS solves the problems of the certificate management through key escrow.

关键词： Lattice Threshold signature Inhomogeneous small integer solution Certificateless public key Lattice sampling technique

Purification of specularite by centrifugation instead of flotation to produce iron oxide red pigment

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 56-65页

作者： Xi Zhang Shun-wei Zhu yu-jiang Li Yong-li Li qiang Guo Tao qi National Engineering Laboratory of Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Environmental Science and Engineering Shandong UniversityQingdao 266200China Zhengzhou Institute of Emerging Industrial Technology Zhengzhou 450003China

This study used specularite, a high-gradient magnetic separation concentrate, as a raw material in reverse *** iron concentrate with a grade of 65.1 wt% and a recovery rate of 75.31% were obtained.A centrifugal concentrator served as the deep purification equipment for the preparation of iron oxide red pigments, and its optimal rotating drum speed, feed concentration, and other conditions were *** optimal conditions, a high-purity iron oxide concentrate with a grade of 69.38 wt% and a recovery rate of 80.89% were obtained and used as a raw material for preparing iron oxide red *** with sulfuric acid produced iron red pigments with different ***, middlings with a grade of 60.20 wt% and a recovery rate of 17.51% were obtained and could be used in blast furnace ***-value utilization of specularite beneficiation products was thus achieved.

关键词： specularite reconcentration centrifugal concentrator iron oxide red pigment

Review on the challenges and strategies in oil and gas industry's transition towards carbon neutrality in China

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Petroleum Science 2023年第6期20卷 3931-3944页

作者： qi Zhang jiang-Feng Liu Zhi-Hui Gao Si-yuan Chen Bo-yu Liu School of Business Administration China University of Petroleum(Beijing)at KaramayKaramay834000XinjiangChina School of Economics and Management China University of Petroleum(Beijing)Beijing102249China Tianshan Research Institute Karamay834000XinjiangChina School of Economics and Management North China Electric Power UniversityBeijing102206China

In light of carbon-neutral pledge, the oil and gas industry has been facing several critical new challenges in China. The current status and new challenges in terms of market mechanism reform, supply-consumption balance and key technology innovation in China's oil and gas industry are reviewed in the present study, and new strategies and roadmaps are proposed to cope with the challenges. The study found that (i) the oil and gas market faces challenges such as incomplete pricing mechanisms, unclear subject rights, and the lack of recognition and trading of carbon assets. (ii) the trade-off between short-term supply security and long-term low-carbon supply is the most critical issue. (iii) in addition to typical challenges such as immature technology and lack of funding support, the unclear multiple technology coupling development mode also poses problems for the low-carbon transformation of the oil and gas industry. To address these new challenges, comprehensive strategies and roadmaps for China's oil and gas industry towards carbon neutrality are proposed and discussed in the aspects of participating in market transactions, restructuring production and consumption, deploying key technology innovations, and planning enterprise strategies. The present study is expected to provide a blueprint for the future development of China's oil and gas industry towards carbon neutrality.

关键词： China's oil and gas industry Carbon neutrality Challenges and strategies

Research of high speed optical switch based on compound semiconductor

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Chinese Science Bulletin 2009年第20期54卷 3679-3684页

作者： WANG MingHua qi Wei yu Hui jiang Xiaoqing YANG JianYi Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China School of Information and Electrical Engineerig Zhejiang University City College Hangzhou 310014 China

High-speed optical switch and its array are the crucial components of all-optical switching *** paper presents the analytical model of a total-internal-reflection(TIR) optical *** employing the carrier injection effect in GaAs and the GaAs/AlGaAs double heterojunction structure,the X-junction TIR switch and the Mach-Zehnder interference(MZI) switch are demonstrated at 1.55 μ*** measured results show that the extinction ratio of both switches exceeds 20 *** switching speed reaches the scale of 10 ns.

关键词：光开关化合物半导体 AlGaAs 公路货运载流子注入双异质结构关键部件交换系统

Effect of Heat Treatment on Microstructure and Property of Cr13 Super Martensitic Stainless Steel

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Journal of Iron and Steel Research International 2011年第11期18卷 60-66页

作者： LIU yu-rong YE Dong YONG qi-long SU Jie ZHAO Kun-yu jiang Wen College of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 Yunnan China Institute of Structural Materials Central Iron and Steel Research Institute Beijing 100081 China

The microstructures and mechanical properties of Cr13 super martensitic stainless steel after different heat treatments were studied. The results show that the structures of the steel after quenching are of lath martensite mixed with a small amount of retained austenite. With the raising quenching temperature, the original austenite grain size increases and the lath martensite gradually becomes thicker. The structures of the tempered steel are mixtures of tempered martensite and reversed austenite dispersed in the martensite matrix. The amount of reversed austenite is from 7.54% to 22. 49%. After different heat treatments, the tensile strength, the elongation and the HRC hardness of the steel are in the range of 813 1 070 MPa, 10.1%--21.2% and 21.33--32.37, respectively. The steel displays the best comprehensive mechanical properties after the sample is quenched at 1 050 ℃ followed by tempering at 650 ℃.

关键词： super martensitic stainless steel quenching tempering structure property reversed austenite

Gut microbiota shifts in hepatitis B-related portal hypertension after transjugular intrahepatic portosystemic shunt:Mechanistic and clinical implications

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World Journal of Gastroenterology 2025年第3期31卷 134-137页

作者： qi-Rong jiang Da-Wu Zeng Department of Hepatology Hepatology Research InstituteThe First Affiliated HospitalFujian Medical UniversityFuzhou 350005Fujian ProvinceChina Department of Infectious Diseases The First Affiliated Hospital of Fujian Medical UniversityFuzhou 350004Fujian ProvinceChina

In this article,we provide commentary on the recent article by Zhao et *** focus on the shifts in the gut microbiota of patients with hepatitis B virus(HBV)-associated cirrhosis/portal hypertension(PH)following transjugular intrahepatic portosystemic shunt(TIPS)and the implications for understanding the mechanisms,diagnosis,and *** comparing the gut microbiota composition and dynamic changes before and after TIPS in patients with and without hepatic encephalopathy,the authors found an increase in non-probiotic bacteria in those who developed hepatic encephalopathy post-TIPS,with Morganella species present only in the hepatic encephalopathy *** gut microbiota changes post-TIPS among patients without the occurrence of hepatic encephalopathy suggest potential therapeutic benefits through prophylactic microbiome ***,the specific gut microbiota alterations may hold promise to predict the risk of hepatic encephalopathy in individuals undergoing TIPS for HBVrelated *** these promising findings,future studies are needed to address limitations,including a small sample size,a relatively short evaluation period for gut microbiota alterations,the absence of data on dynamic alterations in gut microbiota post-TIPS and their correlation with blood ammonia levels,and the lack of validation in animal *** conclusion,Zhao et al's study has shed new light on the link of gut microbiota with post-TIPS hepatic encephalopathy,potentially through the intricate gut-liver axis,and has important clinical implications for improving the management of patients with HBV-related PH.

关键词： Hepatitis B virus Cirrhosis Portal hypertension Hepatic encephalopathy Transjugular intrahepatic portosystemic shunt Gut microbiota

Sleep quality of patients with postoperative glioma at home

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World Journal of Clinical Cases 2020年第20期8卷 4735-4742页

作者： Yang Huang Zi-Juan jiang Juan Deng yu-Juan qi Department of Neurosurgery The Affiliated Brain Hospital of Nanjing Medical UniversityNanjing 210029Jiangsu ProvinceChina

BACKGROUND The sleep quality of patients with postoperative glioma at home has not been reported *** this study,the sleep quality of postoperative glioma patients at home was explored through telephone *** To investigate the sleep quality of patients with postoperative *** Glioma patients who were treated and operated on at Nanjing Brain Hospital from May 2012 to August 2019 were selected as participants via convenience sampling.A total of 549 patients were recruited by telephone,and 358 of those patients responded to the Pittsburgh Sleep Quality Index(PSqi).RESULTS The total PSqi score was 5.19±3.39 in all patients with postoperative glioma,which was higher than that of the normal *** were 135 patients with poor sleep quality(PSqi>7),which accounted for 37.7%of all *** scores of the seven dimensions of the PSqi were sleep latency(1.22±1.05),sleep disturbance(1.12±0.98),subjective sleep quality(1.03±0.92),habitual sleep efficiency(1.02±0.91),daytime dysfunction(0.95±0.43),sleep persistence(0.83±0.76),and use of sleeping medication(0.25±0.24).The results showed that the subjective sleep quality of the patients who underwent an operation 1-2 years ago was worse than that of the patients who underwent an operation more than 2 years ago(P<0.05).Older patients had worse sleep latency and sleep duration scores than younger patients(P<0.05).Sleep disturbance and daytime dysfunction were worse in patients who received postoperative radiotherapy/chemotherapy(P<0.05).CONCLUSION The sleep quality of patients with postoperative glioma at home is worse than that of normal ***,difficulty falling asleep and sleep disorders are common complications among these patients,and age,postoperative duration,and postoperative chemoradiotherapy could affect sleep quality.

关键词： Sleep quality Postoperative Glioma patients Radiotherapy Chemotherapy Outcome