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Brief introduction to the historical development and therapeutic effects of cupping therapy in traditional Chinese medicine
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作者 ping Zhou Wei-Jie Xie ping zheng 《TMR Non-Drug Therapy》 2019年第1期27-34,共8页
Cupping therapy (CT) is an ancient traditional and complementary medicine practice. Recently, there has been a growing evidence of its potential benefits in the treatment of various diseases. The CT has been constantl... Cupping therapy (CT) is an ancient traditional and complementary medicine practice. Recently, there has been a growing evidence of its potential benefits in the treatment of various diseases. The CT has been constantly developing with the emergence of various modern and improved cupping devices. It is now evident that cupping could adjust the Qi, blood, Yin and Yang, dredge the meridian, as well as relieve the effect of illness, achieve fitness and relative equilibrium of Yin-Yang. It exerts its effects through the negative pressure suction via the mechanical and thermal stimulations, and the negative pressure effects induced by cupping. This article gives an overview of CT practice, its historical development, as well as its therapeutic effects and mechanism. Furthermore, a new and updated classification of CT was briefly introduced. 展开更多
关键词 CUPPING therapy THERAPEUTIC mechanisms HISTORICAL development TCM
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转录组数据分析鉴定心房颤动患者的相关基因
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作者 李硕 平政 +2 位作者 牛慧茹 袁钰青 曹雪滨 《中国循证心血管医学杂志》 2025年第7期774-780,共7页
目的根据心房颤动患者的表达谱数据以生物信息学方式筛选出心房颤动的关键致病基因。方法通过基因表达综合数据库(Gene expression omnibus,GEO)筛选出心房颤动数据集GSE79768和GSE41177。使用R语言提取GSE79768数据集中的表达数据后进... 目的根据心房颤动患者的表达谱数据以生物信息学方式筛选出心房颤动的关键致病基因。方法通过基因表达综合数据库(Gene expression omnibus,GEO)筛选出心房颤动数据集GSE79768和GSE41177。使用R语言提取GSE79768数据集中的表达数据后进行t检验,筛选差异基因的标准设定为P<0.05且基因表达量的变化幅度(|logFC|)超过0.585;利用加权基因共表达网络分析(Weighted Gene Co-Expression Network Analysis,WGCNA)以及最小绝对收缩和选择算子(Least Absolute Shrinkage and Selection Operator,LASSO)回归模型筛选疾病关键基因,并对关键基因进行基因本体(Gene ontology,GO)通路分析和GO语义相似性。最后,通过单样本基因集富集分析(Single-sample gene set enrichment analysis,ssGSEA)算法分析免疫细胞在心房颤动中的浸润,采用Pearson相关性检验分析免疫细胞与关键基因的相关性。结果共筛选出五个潜在的诊断关键基因,分别为LRRC39、LBH、RGS18、WIF1与EIF5A,其中LRRC39、LBH、RGS18均与中性粒细胞的浸润程度呈正相关,均参与NOTCH信号通路。结论LRRC39、LBH、RGS18、WIF1和EIF5A基因与肥大细胞、中性粒细胞、NK细胞显著相关,且与心房颤动的发生具有紧密联系,或可成为心房颤动的潜在诊断基因,从而为临床诊断提供依据。 展开更多
关键词 心房颤动 生物信息学 免疫浸润 差异表达基因
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谷氨酸棒杆菌的代谢工程使能技术研究进展 被引量:14
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作者 王钰 郑平 孙际宾 《生物工程学报》 CAS CSCD 北大核心 2021年第5期1603-1618,共16页
谷氨酸棒杆菌Corynebacterium glutamicum是重要的工业微生物,尤其是在氨基酸工业中,每年用于600余万t氨基酸的生物制造。近年来,谷氨酸棒杆菌代谢工程使能技术正在不断完善,不仅加快了细胞工厂的创建和优化,拓展了底物谱和产物谱,也推... 谷氨酸棒杆菌Corynebacterium glutamicum是重要的工业微生物,尤其是在氨基酸工业中,每年用于600余万t氨基酸的生物制造。近年来,谷氨酸棒杆菌代谢工程使能技术正在不断完善,不仅加快了细胞工厂的创建和优化,拓展了底物谱和产物谱,也推动了谷氨酸棒杆菌的基础研究,使谷氨酸棒杆菌成为代谢工程的理想底盘细胞。文中综述了近期针对谷氨酸棒杆菌开发的代谢工程使能技术,着重介绍了基于CRISPR的基因组编辑、基因表达调控、适应性进化和生物传感器等技术的开发和应用。 展开更多
关键词 谷氨酸棒杆菌 代谢工程 基因组编辑 表达调控 适应性进化 生物传感器
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面向工业生物技术的系统生物学 被引量:7
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作者 郑小梅 郑平 孙际宾 《生物工程学报》 CAS CSCD 北大核心 2019年第10期1955-1973,共19页
工业生物技术是以微生物细胞工厂利用可再生的生物原料来生产能源、材料与化学品等的生物技术,在解决资源、能源与环境等问题方面起着越来越重要的作用。系统生物学是全面解析微生物细胞工厂及其发酵过程从“黑箱”到“白箱”的重要研... 工业生物技术是以微生物细胞工厂利用可再生的生物原料来生产能源、材料与化学品等的生物技术,在解决资源、能源与环境等问题方面起着越来越重要的作用。系统生物学是全面解析微生物细胞工厂及其发酵过程从“黑箱”到“白箱”的重要研究方法。系统生物学借助基因组、转录组、蛋白质组、代谢组以及代谢流组等多组学数据,可解析微生物细胞工厂在RNA、蛋白与代谢物等不同水平上的变化规律与调控机制。目前,系统生物学在微生物细胞工厂的设计创建与发酵工艺优化中起着越来越重要的指导作用,许多成功应用实例不断涌现,推动着工业生物技术的快速发展。文中重点综述基因组、转录组、蛋白质组、代谢组与代谢流组以及基因组规模的网络模型等各组学技术的最新发展及其在工业生物技术尤其是菌株改造与发酵优化中的应用,并就工业生物技术中系统生物学的未来发展方向进行展望。 展开更多
关键词 工业生物技术 系统生物学 多组学 菌株设计 发酵优化
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基于CRISPR/Cas系统的黑曲霉基因组编辑技术 被引量:5
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作者 郑小梅 郑平 孙际宾 《生物工程学报》 CAS CSCD 北大核心 2021年第3期980-990,共11页
黑曲霉Aspergillus niger是有机酸与酶制剂的重要工业生产菌株,以极端环境耐受性、高生产经济性、强发酵鲁棒性与高食品安全性等优势成为不可多得的细胞工厂。合成生物学与系统生物学的快速发展,不仅拉开了全面揭示黑曲霉细胞工厂高效... 黑曲霉Aspergillus niger是有机酸与酶制剂的重要工业生产菌株,以极端环境耐受性、高生产经济性、强发酵鲁棒性与高食品安全性等优势成为不可多得的细胞工厂。合成生物学与系统生物学的快速发展,不仅拉开了全面揭示黑曲霉细胞工厂高效运转机制的序幕,而且为高效黑曲霉细胞工厂的创建优化提供了新技术体系。作为新一代的基因组编辑技术,基于CRISPR/Cas系统的基因组编辑技术为黑曲霉基因组定向改造与基因表达调控带来了革命性突破。本文重点综述该技术在黑曲霉中的最新进展及其在黑曲霉基因编辑与表达调控中的应用,并对其未来发展方向进行展望。 展开更多
关键词 黑曲霉 细胞工厂 CRISPR/Cas系统 基因组编辑
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Unlocking the power of swine gut bacteria:newly isolated Blautia strain and its metabolites inhibit the replication of Salmonella Typhimurium in macrophages and alleviate DSS‑induced colitis in mice
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作者 Jiatong Wei Yang Liu +20 位作者 Hua Li Ze Lu Yanjiao Liu Yifan Zhang Cong Lan Aimin Wu Jun He Jingyi Cai Gang Tian Daiwen Chen Bing Yu Zhiqing Huang ping zheng Xiangbing Mao Jie Yu Junqiu Luo Hui Yan Jiayong Tang Huifen Wang Quyuan Wang Yuheng Luo 《Journal of Animal Science and Biotechnology》 2025年第5期2213-2233,共21页
Background Inflammatory bowel disease is a significant health concern for both humans and large-scale farm animals.In the quest for effective alternatives to antibiotics,next-generation probiotics(NGPs)have emerged as... Background Inflammatory bowel disease is a significant health concern for both humans and large-scale farm animals.In the quest for effective alternatives to antibiotics,next-generation probiotics(NGPs)have emerged as a promising option.The genus Blautia presents a rich source of potential NGP strains.Here we successfully isolated Blautia hominis LYH1 strain from the intestines of healthy weaned piglets and characterized its biological traits.Its antiinflammatory activity was then assessed using macrophages,while its protective effects against colitis and gut barrier damage were validated in a DSS-induced mouse colitis model.Results B.hominis LYH1 displayed typical characteristics of an obligate anaerobe,including non-hemolytic and nonmotile features,and a genome enriched with carbohydrate-active enzyme genes.It produced metabolites with antibiotic-like compounds,demonstrating antimicrobial activity against Escherichia coli.In vitro,B.hominis LYH1 effectively inhibited pathogen replication in macrophages,reducing cellular infections and alleviating inflammatory damage.In vivo,oral administration of B.hominis LYH1 or its metabolites significantly mitigated DSS-induced colitis in mice by suppressing pro-inflammatory cytokines,inhibiting T-lymphocyte activation,and enhancing short-chain fatty acid production.Conclusions Our findings underscore B.hominis LYH1’s potential as a NGP for maintaining gut health and combating intestinal inflammation.These findings offer valuable insights into the development of antibiotic alternatives and innovative strategies for preventing and treating enteritis in both agricultural and medical settings. 展开更多
关键词 Blautia hominis COLITIS Inflammation MACROPHAGE
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Review of Fault Diagnosis and Fault-tolerant Control Technologies for Permanent-magnet Synchronous Machine
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作者 ping zheng Wei Liu +2 位作者 Yiteng Gao Chengde Tong Yi Sui 《CES Transactions on Electrical Machines and Systems》 2025年第3期320-339,共20页
Permanent-magnet synchronous machines(PMSMs)are widely used in robotics,rail transportation,and electric vehicles owing to their high power density,high efficiency,and high power factor.However,PMSMs often operate in ... Permanent-magnet synchronous machines(PMSMs)are widely used in robotics,rail transportation,and electric vehicles owing to their high power density,high efficiency,and high power factor.However,PMSMs often operate in harsh environments,where critical components such as windings and permanent magnets(PMs)are susceptible to failures.These faults can lead to a significant degradation in performance,posing substantial challenges to the reliable operation of PMSMs.This paper presents a comprehensive review of common fault types in PMSMs,along with their corresponding fault diagnosis and fault-tolerant control strategies.The underlying mechanisms of typical faults are systematically analyzed,followed by a detailed comparison of various diagnostic and fault-tolerant control methods to evaluate their respective advantages and limitations.Finally,the review concludes by identifying key research gaps in PMSM fault diagnosis and fault-tolerant control,while proposing potential future directions for advancing this field. 展开更多
关键词 Permanent-magnet synchronous machine(PMSM) Fault detection Fault diagnosis FAULT-TOLERANT
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The Effect of COVID-19 on the Cancer Patients Treated with Radiotherapy in Low Risk Area: A Single-Center Descriptive
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作者 ping zheng Junyi Cao +2 位作者 Ke Liu Ya Pang Dong Wang 《Journal of Cancer Therapy》 2022年第5期275-283,共9页
Objective: To investigate the influence of the new coronavirus epidemic on tumor radiotherapy patients in Zigong City, and provide radiotherapy feasibility and safety in other prefecture-level or low-risk areas. Metho... Objective: To investigate the influence of the new coronavirus epidemic on tumor radiotherapy patients in Zigong City, and provide radiotherapy feasibility and safety in other prefecture-level or low-risk areas. Methods: Retrospective Collection of data from January 31, 2020, in our hospital, this time period is an epidemic group. The control group was data from January 31, 2019-May 31, in our hospital. Patient data includes gender, age, tumor type, hospitalization fee, average hospitalization day, radiotherapy completion, treatment destination, and other information. Results: The patients with epidemic groups and control groups were 320 and 237, respectively, and the radiotherapy patients increased by 25.9%, increasing patients mainly from other departures outside the tumor department underperformance reform intervention. The epidemic group of brain and breast tumor patients were 39 and 37, respectively, with statistical differences (P < 0.05) compared to the control group (25 and 16 respectively). The number of tumor radiotherapy patients in other parts increased, but there was no statistical difference (P > 0.05). Inpatient costs, the average hospitalization day, radiotherapy completion, the purpose of treatment, and other data epidemic groups and control groups have no statistical difference (P > 0.05). Conclusion: The number of COVID-2019 epidemic interventions has increased the number of cancer radiotherapy patients in our hospital, and the epidemic situation has no effect on hospitalization, the average hospitalization day, radiotherapy, and the like. Optimizing the process of clinical treatment, strict prevention and control measures can ensure timely and safe radiotherapy in low-risk areas. 展开更多
关键词 COVID-2019 RADIOTHERAPY Prevention and Control Low-Risk Areas Single Center
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高兼容性分形阵列仿生天线设计 被引量:1
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作者 林斌 刘泽泰 +4 位作者 张颖 沈少东 魏昕煜 郑萍 张培涛 《无线通信》 2017年第5期170-177,共8页
本文针对移动通信系统、射频识别系统、超宽带系统、移动数字电视系统对天线的性能要求,创造性的将蝶形仿生天线与希尔伯特分形阵列相结合,设计了一款高兼容性分形阵列仿生天线,制作了天线样品并测试了天线的辐射特性。测试结果表明,该... 本文针对移动通信系统、射频识别系统、超宽带系统、移动数字电视系统对天线的性能要求,创造性的将蝶形仿生天线与希尔伯特分形阵列相结合,设计了一款高兼容性分形阵列仿生天线,制作了天线样品并测试了天线的辐射特性。测试结果表明,该款天线完全覆盖了第二代至第五代移动通信所有工作频段、射频识别系统频段、超宽带系统频段和移动数字电视系统频段。使用该天线的智能终端将兼具手机通信、射频卡读写、超宽带传输和移动数字电视等多种功能,该天线有较大的应用潜力。 展开更多
关键词 移动通信 射频识别 超宽带系统 移动数字电视 蝶形仿生天线 希尔伯特分形阵列
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基于时间序列转录组筛选谷氨酸棒杆菌内源高效组成型启动子 被引量:4
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作者 王迎春 刘娇 +3 位作者 倪晓蒙 雷宇 郑平 刁爱坡 《生物工程学报》 CAS CSCD 北大核心 2018年第11期1760-1771,共12页
启动子是重要的转录调控元件,广泛用于工业菌株的代谢工程改造。谷氨酸棒杆菌Corynebacterium glutamicum是重要的氨基酸生产菌株,但已报道的组成型强启动子较少。对谷氨酸高产菌Corynebacterium glutamicum SL4发酵过程的10个时间点样... 启动子是重要的转录调控元件,广泛用于工业菌株的代谢工程改造。谷氨酸棒杆菌Corynebacterium glutamicum是重要的氨基酸生产菌株,但已报道的组成型强启动子较少。对谷氨酸高产菌Corynebacterium glutamicum SL4发酵过程的10个时间点样品进行转录组测序,筛选在发酵过程中稳定转录并且转录水平最高的10个基因;分别克隆其启动子序列至红色荧光蛋白(RFP)报告系统,通过荧光强度表征启动子在SL4菌株中的强度,再在野生型C. glutamicum ATCC 13869和ATCC 13032中验证部分启动子的通用性;并采用LacZ蛋白进一步评价强启动子的表达效果。结果显示,成功筛选到3个可以通用的组成型启动子P_(cysK)、P_(gapA)和P_(fumC)。其中P_(cysK)的表达强度最高,与诱导型强启动子P_(tac)对比,在SL4和13869菌株中均达到其2倍(RFP)和4倍(LacZ)以上;在ATCC 13032菌株中,P_(cysK)的表达强度为P_(tac)的0.3-0.4倍。Pcys K首次被报道为强启动子,可用于谷氨酸棒杆菌强化合成途径的代谢工程改造。 展开更多
关键词 谷氨酸棒杆菌 时间序列转录组 启动子 RFP报告系统
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双气囊和单气囊小肠镜对小肠疾病诊断价值的研究 被引量:9
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作者 余琪 李琴 +2 位作者 郑萍 胥明 卢水蓉 《中国内镜杂志》 2018年第3期16-21,共6页
目的比较双气囊和单气囊小肠镜对小肠疾病的诊断价值。方法 2014年7月-2016年8月因疑似小肠疾病而就诊的患者117例,根据治疗方法分为双气囊电子小肠镜组(DBE)68例和单气囊电子小肠镜组(SBE)49例,比较两组患者经口和经肛进镜的检查时间... 目的比较双气囊和单气囊小肠镜对小肠疾病的诊断价值。方法 2014年7月-2016年8月因疑似小肠疾病而就诊的患者117例,根据治疗方法分为双气囊电子小肠镜组(DBE)68例和单气囊电子小肠镜组(SBE)49例,比较两组患者经口和经肛进镜的检查时间、插镜深度、检出率和治疗率以及不同主诉情况和不同疾病的检出率,评价安全性。结果经口入镜和经肛入镜中,DBE组和SBE组的检查时间、插镜深度、检出率和治疗率比较差异均无统计学意义(P>0.05),两组对不明原因的消化道出血、腹痛、腹泻和其他的小肠疾病的检出率比较差异均无统计学意义(P>0.05),对克罗恩病、恶性肿瘤、良性肿瘤、小肠炎、非特异性溃疡、息肉、憩室和肺结核等的检出率比较差异均无统计学意义(P>0.05)。两组均未见严重并发症。结论 DBE和SBE对小肠疾病的检出率相当。 展开更多
关键词 双气囊电子小肠镜 单气囊电子小肠镜 诊断 克罗恩病
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谷氨酸棒杆菌碱基编辑的条件优化 被引量:5
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作者 李俊维 刘叶 +3 位作者 王钰 郁彭 郑平 王猛 《生物工程学报》 CAS CSCD 北大核心 2020年第1期143-151,共9页
近年来,基于CRISPR/Cas9的碱基编辑技术因其具有不产生DNA双链断裂、无需外源DNA模板、不依赖宿主同源重组修复的优势,已经逐渐发展成为一种强大的基因组编辑工具,在动物、植物、酵母和细菌中得到了开发和应用。研究团队前期已在重要的... 近年来,基于CRISPR/Cas9的碱基编辑技术因其具有不产生DNA双链断裂、无需外源DNA模板、不依赖宿主同源重组修复的优势,已经逐渐发展成为一种强大的基因组编辑工具,在动物、植物、酵母和细菌中得到了开发和应用。研究团队前期已在重要的工业模式菌株谷氨酸棒杆菌中开发了一种多元自动化的碱基编辑技术MACBETH,为进一步优化该方法,提高碱基编辑技术在谷氨酸棒杆菌中的应用效率,本研究首先在谷氨酸棒杆菌中构建了基于绿色荧光蛋白(GFP)的检测系统:将GFP基因的起始密码子ATG人工突变为ACG,GFP无法正常表达,当该密码子的C经编辑后恢复为T,即实现GFP蛋白的复活,结合流式细胞仪分析技术,可快速衡量编辑效率。然后,构建针对靶标位点的碱基编辑工具,经测试,该位点可成功被编辑,在初始编辑条件下碱基编辑效率为(13.11±0.21)%。在此基础上,通过对不同培养基类型、诱导初始OD600、诱导时间、诱导物浓度进行优化,确定最优编辑条件是:培养基为CGXII,初始OD600为0.05,诱导时间为20 h,IPTG浓度为0.01 mmol/L。经过优化,编辑效率达到(30.35±0.75)%,较初始条件提高了1.3倍。最后,选取原编辑条件下编辑效率较低的位点,进行了优化后编辑条件下的编辑效率评估,结果显示,不同的位点在最优编辑条件下的编辑效率提高了1.7–2.5倍,进一步证实该优化条件的有效性及通用性。研究结果为碱基编辑技术在谷氨酸棒杆菌中更好的应用提供了重要的参考价值。 展开更多
关键词 碱基编辑 谷氨酸棒杆菌 CRISPR/Cas系统 编辑条件
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福建省维管植物名录 被引量:18
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作者 安昌 庄怡雪 +3 位作者 郑平 林彦翔 杨成梓 秦源 《生物多样性》 CAS CSCD 北大核心 2023年第6期15-23,共9页
经几代人前赴后继的野外科考和孳孳不息的伏案整理,福建植物多样性调查及保护工作历久弥新。为全面更新和了解福建省维管植物资源的现状,近年来已开展的福建省维管植物多样性相关调查与科考工作成果亟需进一步梳理和呈现。本文在《福建... 经几代人前赴后继的野外科考和孳孳不息的伏案整理,福建植物多样性调查及保护工作历久弥新。为全面更新和了解福建省维管植物资源的现状,近年来已开展的福建省维管植物多样性相关调查与科考工作成果亟需进一步梳理和呈现。本文在《福建植物志》(1982–1995年)的基础上,通过收集文献、考证标本、查阅相关志书及数据库,并结合笔者及众多一线调查工作者的野外调查结果,依照维管植物最新的分类系统(APG IV系统、杨氏系统、PPG I系统)整理出福建省维管植物名录,包含科属信息、中文名、拉丁名、物种的省内分布及数据来源等信息。结果显示,福建省野生、归化及栽培维管植物共计256科1,807属5,587种(其中野生植物231科1,402属4,550种),其中石松类和蕨类植物32科102属414种,裸子植物10科38属76种,被子植物214科1,667属5,097种,较《福建植物志》记载数据新增8科216属1,107种。从数据分析可知,石松类和蕨类植物物种数排列前5位的科为鳞毛蕨科(67种)、水龙骨科(51种)、凤尾蕨科(51种)、金星蕨科(42种)和蹄盖蕨科(38种);裸子植物中物种数最多的科和属分别为柏科(15属25种)和松属(Pinus,14种);被子植物物种数量排列前10位的科分别为禾本科(452种)、豆科(305种)、菊科(279种)、兰科(244种)、莎草科(225种)、蔷薇科(198种)、唇形科(188种)、茜草科(126种)、锦葵科(85种)和樟科(80种),总计2,180个物种,占福建省维管植物物种总数的39.0%;物种数排列前5位的属分别为薹草属(Carex,94种)、悬钩子属(Rubus,58种)、冬青属(Ilex,54种)、刚竹属(Phyllostachys,38种)和蓼属(Persicaria,36种)。本研究旨在后植物志时代对福建省维管植物的物种名录进行修订和更新,进一步完善物种分布概况和标本信息,以期为福建省植物多样性调查、评估及保护,植物学相关学科的发展以及《福建植物志》的再版等提供基础资料。 展开更多
关键词 福建省 维管植物 名录 新种 新分布
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一碳代谢关键酶——甲醇脱氢酶的研究进展与展望 被引量:6
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作者 凡立稳 王钰 +1 位作者 郑平 孙际宾 《生物工程学报》 CAS CSCD 北大核心 2021年第2期530-540,共11页
甲醇和甲烷等一碳原料来源广泛,价格低廉,是生物制造的理想原料。甲醇脱氢酶(Methanol dehydrogenase,MDH)催化甲醇生成甲醛是一碳代谢的关键反应。目前已从天然甲基营养菌中发现了多种利用不同辅因子,具有不同酶学性质的MDH。其中,烟... 甲醇和甲烷等一碳原料来源广泛,价格低廉,是生物制造的理想原料。甲醇脱氢酶(Methanol dehydrogenase,MDH)催化甲醇生成甲醛是一碳代谢的关键反应。目前已从天然甲基营养菌中发现了多种利用不同辅因子,具有不同酶学性质的MDH。其中,烟酰胺腺嘌呤双核苷酸(NAD)依赖型MDH被广泛应用于构建人工甲基营养菌。但是,NAD依赖型MDH的甲醇氧化活性较低,对甲醇的亲和力较差,导致甲醇氧化成为人工甲基营养菌代谢甲醇的限速步骤。为了提高甲醇氧化速率,进而提高人工甲基营养菌的甲醇利用效率,近年来大量研究集中于MDH的挖掘与改造研究。文中系统综述了不同类型MDH的发现、表征、改造以及在人工甲基营养菌中的应用进展,详细阐述了MDH的定向进化和多酶复合体的构建,并展望了通过细胞生长偶联的蛋白质进化和蛋白质理性设计获得高活性MDH的潜在策略。 展开更多
关键词 甲醇脱氢酶 甲醇 定向进化 人工甲基营养菌
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谷氨酸棒杆菌中氨基酸分泌转运蛋白及其代谢改造研究进展 被引量:9
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作者 张晓梅 高宇洁 +5 位作者 杨玲 杨毅 郑平 孙际宾 史劲松 许正宏 《生物工程学报》 CAS CSCD 北大核心 2020年第11期2250-2259,共10页
氨基酸是一类在食品、医药及化工等领域具有广泛应用的重要化合物。谷氨酸棒杆菌Corynebacterium glutamicum是生物合成氨基酸最重要的微生物菌株,其年产各类氨基酸超过百万吨。谷氨酸棒杆菌高产氨基酸除具有强大的合成代谢能力外,高效... 氨基酸是一类在食品、医药及化工等领域具有广泛应用的重要化合物。谷氨酸棒杆菌Corynebacterium glutamicum是生物合成氨基酸最重要的微生物菌株,其年产各类氨基酸超过百万吨。谷氨酸棒杆菌高产氨基酸除具有强大的合成代谢能力外,高效的分泌转运能力也是不可忽略的分子基础。文中综述了近年来谷氨酸棒杆菌中氨基酸分泌转运蛋白及其代谢改造的研究进展,并展望了未来发展方向,为进一步改造提升其发酵生产氨基酸的能力提供了可资借鉴的资料。 展开更多
关键词 谷氨酸棒杆菌 氨基酸 分泌转运 转运蛋白 代谢改造
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Chromosomal level assembly and population sequencing of the Chinese tree shrew genome 被引量:24
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作者 Yu Fan Mao-Sen Ye +10 位作者 Jin-Yan Zhang Ling Xu Dan-Dan Yu Tian-Le Gu Yu-Lin Yao Jia-Qi Chen Long-Bao Lv ping zheng Dong-Dong Wu Guo-Jie Zhang Yong-Gang Yao 《Zoological Research》 SCIE CAS CSCD 2019年第6期506-521,共16页
Chinese tree shrews (Tupaia belangeri chinensis) have become an increasingly important experimental animal in biomedical research due to their close relationship to primates. An accurately sequenced and assembled geno... Chinese tree shrews (Tupaia belangeri chinensis) have become an increasingly important experimental animal in biomedical research due to their close relationship to primates. An accurately sequenced and assembled genome is essential for understanding the genetic features and biology of this animal. In this study, we used long-read single-molecule sequencing and high-throughput chromosome conformation capture (Hi-C) technology to obtain a high-qualitychromosome-scale scaffolding of the Chinese tree shrew genome. The new reference genome (KIZ version 2: TS_2.0) resolved problems in presently available tree shrew genomes and enabled accurate identification of large and complex repeat regions, gene structures, and species-specific genomic structural variants. In addition, by sequencing the genomes of six Chinese tree shrew individuals, we produced a comprehensive map of 12.8 M single nucleotide polymorphisms and confirmed that the major histocompatibility complex (MHC) loci and immunoglobulin gene family exhibited high nucleotide diversity in the tree shrew genome. We updated the tree shrew genome database (TreeshrewDB v2.0: http://www.treeshrewdb.org) to include the genome annotation information and genetic variations. The new high-quality reference genome of the Chinese tree shrew and the updated TreeshrewDB will facilitate the use of this animal in many different fields of research. 展开更多
关键词 Tupaia belangeri CHROMOSOMAL LEVEL ASSEMBLY GENOME POPULATION SEQUENCING Database
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Solid state fermentation of rapeseed cake with Aspergillus niger for degrading glucosinolates and upgrading nutritional value 被引量:41
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作者 Changyou Shi Jun He +5 位作者 Jie Yu Bing Yu Zhiqing Huang Xiangbing Mao ping zheng Daiwen Chen 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2015年第3期340-346,共7页
Background: Rapeseed cake is a good source of protein for animal feed but its utilization is limited due to the presence of anti-nutritional substances, such as glucosinolates (GIs), phytic acid, tannins etc. In th... Background: Rapeseed cake is a good source of protein for animal feed but its utilization is limited due to the presence of anti-nutritional substances, such as glucosinolates (GIs), phytic acid, tannins etc. In the present study, a solid state fermentation (SSF) using Aspergillus niger was carried out with the purpose of degrading glucosinolates and improving the nutritional quality of rapeseed cake (RSC). The effects of medium composition and incubation conditions on the GIs content in fermented rapeseed cake (FRSC) were investigated, and chemical composition and amino acid in vitro digestibility of RSC substrate fermented under optimal conditions were determined. Results: After 72 h of incubation at 34℃, a 76.89% decrease in GIs of RSC was obtained in solid medium containing 70% RSC, 30% wheat bran at optimal moisture content 60% (w/w). Compared to unfermented RSC, trichloroacetic acid soluble protein (TCA-SP), crude protein and ether extract contents of the FRSC were increased (P〈 0.05) 103.71, 23.02 and 23.54%, respectively. As expected, the contents of NDF and phytic acid declined (P〈 0.05) by 9.12 and 44.60%, respectively. Total amino acids (TAA) and essential amino acids (EAA) contents as well as AA in vitro digestibility of FRSC were improved significantly (P 〈 0.05). Moreover, the enzyme activity of endoglucanase, xylanase, acid protease and phytase were increased (P 〈 0.05) during SSF. Conclusions: Our results indicate that the solid state fermentation offers an effective approach to improving the quality of proteins sources such as rapeseed cake. 展开更多
关键词 Aspergillus niger GLUCOSINOLATES Nutritional value Rapeseed cake Solid state fermentation
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Effect of different dietary protein levels and amino acids supplementation patterns on growth performance, carcass characteristics and nitrogen excretion in growing-finishing pigs 被引量:19
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作者 Yumei Zhao Gang Tian +8 位作者 Daiwen Chen ping zheng Jie Yu Jun He Xiangbing Mao Zhiqing Huang Yuheng Luo Junqiu Luo Bing Yu 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2020年第1期111-120,共10页
Background:This study was conducted to determine the effects of different dietary protein levels and amino acids supplementation patterns in low protein diets on the growth performance,carcass characteristics and nitr... Background:This study was conducted to determine the effects of different dietary protein levels and amino acids supplementation patterns in low protein diets on the growth performance,carcass characteristics and nitrogen excretion in growing-finishing pigs.Forty-two barrows(25.00±0.39 kg)were randomly assigned to 7 diets.Diet 1:the high crude protein diet with balanced for 10 essential amino acids(EAAs).Diet 2:the medium crude protein diet with 2%(approx)decreased protein level of Diet 1 and balanced 10 EAAs.Diet 3:the low crude protein diet with 4%decreased protein level of Diet 1 and balanced 10 EAAs.The protein levels of Diet 4,5,6 and 7 were the same as that of Diet 3.Diet 4 was only balanced for lysine(Lys),methionine(Met),threonine(Thr)and tryptophan(Trp);Diet 5 and 6 were further supplemented with extra isoleucine(Ile)or valine(Val),respectively;Diet 7 was further supplemented with extra Ile+Val.Results:Over the 112 days trial,the reduction of dietary protein by 2%or 4%with balanced10 EAAs significantly decreased nitrogen excretion(P<0.05),but had no effects on growth performance and carcass characteristics(P>0.05).In low protein diet,Val supplementation significantly increased body weight gain at 25–50 kg phase(P<0.05),while Ile supplementation at 75–100 kg phase and 100–125 kg phase significantly reduced the ratio of feed to gain(P<0.05).No effect of different dietary protein levels and amino acids supplementation patterns in low protein diets on carcass characteristics was observed(P>0.05).The total N excretion of pigs supplemented with only Lys,Met,Thr and Trp was numerically higher than that of pigs fed with extra Ile,or Val,or Ile+Val diets.Conclusion:In low protein diet,Val is more required than Ile in the early growing phage(25–50 kg),while Ile becomes more required in the late growing and finishing phage(75–125 kg). 展开更多
关键词 Growing-finishing pigs Growth performance ISOLEUCINE Low protein DIETS Nitrogen EXCRETION VALINE
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Adjuvant probiotics improve the eradication effect of triple therapy for Helicobacter pylori infection 被引量:55
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作者 Yi-Qi Du Tun Su +7 位作者 Jian-Gao Fan Yu-Xia Lu ping zheng Xing-Hua Li Chuan-Yong Guo ping Xu Yan-Fang Gong Zhao-Shen Li 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第43期6302-6307,共6页
AIM:To investigate whether the addition of probiotics can improve the eradication effect of triple therapy for Helicobacter pylori (H. pylori ) infection. METHODS:This open randomized trial recruited 234 H. pylori pos... AIM:To investigate whether the addition of probiotics can improve the eradication effect of triple therapy for Helicobacter pylori (H. pylori ) infection. METHODS:This open randomized trial recruited 234 H. pylori positive gastritis patients from seven local centers. The patients were randomized to one-week standard triple therapy (omeprazole 20 mg bid , clarithromycin 500 mg bid , and amoxicillin 1000 mg bid ; OCA group, n = 79); two weeks of pre-treatment with probiotics, containing 3 × 107 Lactobacillus acidophilus per day, prior to one week of triple therapy (POCA group, n = 78); or one week of triple therapy followed by two weeks of the same probiotics (OCAP group, n = 77). Successful eradication was defined as a negative C13 or C14 urease breath test four weeks after triple therapy. Patients were asked to report associated symptoms at baseline and during follow-up, and side effects related to therapy were recorded. Data were analyzed by both intention-to-treat (ITT) and per-protocol (PP) methods. RESULTS:PP analysis involved 228 patients, 78 in the OCA, 76 in the POCA and 74 in the OCAP group. Successful eradication was observed in 171 patients; by PP analysis, the eradication rates were significantly higher (P = 0.007 each) in the POCA (62/76; 81.6%, 95% CI 72.8%-90.4%) and OCAP (61/74; 82.4%, 95% CI 73.6%-91.2%) groups than in the OCA group (48/78; 61.5%, 95% CI 50.6%-72.4%). ITT analysis also showed that eradication rates were significantly higher in the POCA (62/78; 79.5%, 95% CI 70.4%-88.6%) and OCAP (61/77; 79.2%, 95% CI 70%-88.4%) groups than in the OCA group (48/79; 60.8%, 95% CI 49.9%-71.7%), (P = 0.014 and P = 0.015). The symptom relieving rates in the POCA, OCAP and OCA groups were 85.5%, 89.2% and 87.2%, respectively. Only one of the 228 patients experienced an adverse reaction. CONCLUSION:Administration of probiotics before or after standard triple therapy may improve H. pylori eradication rates. 展开更多
关键词 Helicobacter pylori Probiotic ERADICATION
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Anti-inflammatory mechanism of oxymatrine in dextran sulfate sodium-induced colitis of rats 被引量:38
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作者 ping zheng Feng-Li Niu +2 位作者 Wen-Zhong Liu Yao Shi Lun-Gen Lu 《World Journal of Gastroenterology》 SCIE CAS CSCD 2005年第31期4912-4915,共4页
AIM: To investigate the anti-inflammatory mechanism of oxymatrine in dextran sulfate sodium (DSS)-induced colitis of rats. METHODS: Acute colitis was induced by giving 2% DSS orally in drinking water for 8 d. Twen... AIM: To investigate the anti-inflammatory mechanism of oxymatrine in dextran sulfate sodium (DSS)-induced colitis of rats. METHODS: Acute colitis was induced by giving 2% DSS orally in drinking water for 8 d. Twenty-six male rats were randomized into oxymatrine-treated group (group A, 10 rats), DSS control (group B, 10 rats) and normal control (group C, 6 rats). The rats in group A were injected muscularly with oxymatrine at the dosage of 63 mg/(kg·d) from d 1 to 11 and drank 2% DSS solution from d 4 to 11. The rats in group B were treated with 0.9% saline in an equal volume as group A and drank 2% DSS solution from d 4 to 11. The rats in group C were treated with 0.9% saline as group B from d 1 to 11 and drank water normally. Diarrhea and bloody stool as well as colonic histology were observed. The levels of serum tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were determined by ELISA, and nuclear factor-κB (NF-κB) activity and the expression of inter-cellular adhesion molecule-1 (ICAM-1) in colonic mucosa were detected by immunohistochemistry method. RESULTS: Compared with DSS control group, the inflammatory symptoms and histological damages of colonic mucosa in oxymatrine-treated group were significantly improved, the serum levels of TNF-α, IL-6, and the expression of NF-κB, ICAM-1 in colonic mucosa were significantly reduced. CONCLUSION: The fact that oxymatrine can reduce the serum levels of TNF-α, IL-6, and the expression of NF-κB and ICAM-1 in colonic mucosa in DSS-induced colitis of rats indicates that oxymatrine may ameliorate the colonic inflammation and thus alleviate diarrhea and bloody stool. 展开更多
关键词 OXYMATRINE COLITIS Colonic mucosa
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