检索结果-南通市图书馆

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

广西三叉苦林下种植及病虫害防治技术措施

广东蚕业 2024年第5期58卷 27-29页

作者：郑庆斌彭雪迪韦林宏陆江赵滑广西盛麒科技有限公司广西南宁530000 广西壮族自治区国有维都林场广西来宾546100

随着广西的三叉苦产业逐渐形成规模,人工种植面积不断增加,林下种植得到广泛推广,同时,三叉苦的病虫害问题越来越严重,对三叉苦药材的产量和品质造成威胁。文章介绍了目前广西三叉苦林下种植的概况,总结了三叉苦病虫害的常见种类、危害... 详细信息

随着广西的三叉苦产业逐渐形成规模,人工种植面积不断增加,林下种植得到广泛推广,同时,三叉苦的病虫害问题越来越严重,对三叉苦药材的产量和品质造成威胁。文章介绍了目前广西三叉苦林下种植的概况,总结了三叉苦病虫害的常见种类、危害症状及其防治技术与防治措施。

关键词：三叉苦林下种植病虫害防治技术广西

维普期刊数据库博看期刊

Fusing Carbocycles of Inequivalent Ring Size to a Bis(imino)pyridine-Iron Ethylene Polymerization Catalyst: Distinctive Effects on Activity, PE Molecular Weight, and Dispersity

在线全文

学校读者我要写书评

暂无评论

Research 2019年第1期2019卷 442-456页

作者： zheng Wang Gregory A.Solan Yanping Ma qingbin Liu Tongling Liang Wen-Hua Sun Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science Institute of ChemistryChinese Academy of SciencesBeijing 100190China CAS Research/Education Center for Excellence in Molecular Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Chemistry University of LeicesterUniversity RoadLeicester LE17RHUK College of Chemistry and Material Science Hebei Normal UniversityShijiazhuang 050024China State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

The 4,6-bis(arylimino)-1,2,3,7,8,9,10-heptahydrocyclohepta[b]quinoline-iron(II)chlorides(aryl=2,6-Me_(2)C_(6)H_(3) Fe1;2,6-Et_(2)C_(6)H_(3) Fe_(2);2,6-i-Pr_(2)C_(6)H_(3) Fe_(3);2,4,6-Me3C_(6)H_(2) Fe4;and 2,6-Et_(2)-4-Me_(2)C_(6)H_(2) Fe_(5))have been prepared in good yield by a straightforward one-pot reaction of 2,3,7,8,9,10-hexahydro-1H-cyclohepta[b]quinoline-4,6-dione,FeCl_(2)·4H_(2)O,and the appropriate aniline in acetic *** ferrous complexes have been characterized by elemental analysis and FT-IR *** addition,the structure of Fe_(3) has been determined by single crystal X-ray diffraction,which showed the iron center to adopt a distorted square pyramidal geometry with the saturated sections of the fused six-and sevenmembered carbocycles to be *** combination with either MAO or MMAO,Fe1–Fe5 exhibited exceptionally high activities for ethylene polymerization(up to 15:86×10^(6) g(PE)mol^(−1)(Fe)h^(−1) at 40℃(MMAO)and 9:60×10^(6) g(PE)mol^(−1)(Fe)h^(−1) at 60℃(MAO))and produced highly linear polyethylene(HLPE,Tm≥128℃)with a wide range in molecular weights;in general,the MMAO-promoted polymerizations were more *** of the cocatalyst employed,the 2,6-Me_(2)-substituted Fe1 and Fe4 proved the most active while the more sterically hindered 2,6-i-Pr_(2) Fe_(3) the least but afforded the highest molecular weight polyethylene(Mw:65.6–72.6 kg mol^(-1)).Multinuclear NMR spectroscopic analysis of the polymer formed using Fe4/MMAO at 40℃ showed a preference for fully saturated chain ends with a broad bimodal distribution a feature of the GPC trace(Mw/Mn=13:4).By contrast,using Fe4/MAO at 60℃ a vinyl-terminated polymer of lower molecular weight(Mw=14:2 kg mol^(−1))was identified that exhibited a unimodal distribution(Mw/Mn=3:8).Moreover,the amount of aluminoxane cocatalyst employed,temperature,and run time were also found to be influential on the modality of the polymer.

关键词： saturated polymerization straight

A review of the gas hydrate phase transition with a microfluidic approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Reviews 2023年第1期2卷 1-15页

作者： qingbin Liu Yingying Liu Jintao Xu Ying Teng zheng Ling Yi Zhang Lanlan Jiang Yongchen Song Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of TechnologyDalian116024China Shenzhen Key Laboratory of Deep Engineering Sciences and Green Energy Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen518060China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Shenzhen UniversityShenzhen518060China

Over the years,natural gas hydrates(NGHs)have attracted significant attention as an emerging energy *** is a novel technology used to observe the behaviour of NGHs in microchannels directly and has been applied to *** hydrate distributions and phase transitions are key parameters for exploitation and *** this paper,advances in related research with microfluidics-based technology are reviewed,including the hydrate phase transition process and its mechanism of *** formation and decomposition directly influence the efficiency and sustainability of *** addition,studies of the hydrate phase transition provide basic data for future commercial ***,extended applications,further developments and potential improvements in microfluidic techniques are also *** believe that with an improved understanding of the hydrate phase transition mechanism,commercial exploitation of hydrates can be expected soon.

关键词： Clathrate hydrate Microfluidics Morphology Experimental CO_(2)sequestration

Potential one-step strategy for PET degradation and PHB biosynthesis through co-cultivation of two engineered microorganisms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering Microbiology 2021年第1期1卷 3-10页

作者： Pan Liu Tong Zhang Yi zheng qingbin Li Tianyuan Su Qingsheng Qi State Key Laboratory of Microbial Technology Shandong UniversityQingdao 266237China

The management and recycling of plastic waste is a challenging global *** terephthalate(PET),one of the most widely used synthetic plastics,can be hydrolyzed by a series of ***,upcycling the resulting monomers is also a *** this study,we designed a co-cultivation system,in which PET degradation was coupled with polyhydroxybutyrate(PHB)***,PETase from Ideonalla sakaiensis was expressed in Yarrowia lipolytica Po1f with a signal peptide from *** engineered PETase-producing *** was confirmed to hydrolyze bis(2-hydroxyethyl)terephthalate(BHET)and PET powder into the monomers terephthalate(TPA)and ethylene glycol(EG).Simultaneously,a TPA-degrading Pseudomonas stutzeri strain isolated from PET waste was transformed with a recombinant plasmid containing the phb CAB operon from Ralstonia eutropha,which encodes enzymes for the biosynthesis of *** two co-cultivated engineered microbes could directly hydrolyze BHET to produce the bioplastic PHB in one fermentation *** this process,5.16 g/L BHET was hydrolyzed in 12 h,and 3.66 wt%PHB(3.54 g/L cell dry weight)accumulated in 54 h.A total of 0.31g/L TPA was produced from the hydrolyzation of PET in 228 *** PHB could not be synthesized directly from PET because of the low hydrolyzing efficiency of PETase,this study provides a new strategy for the biodegradation and upcycling of PET waste by artificial microflora.

关键词： Polyethylene terephthalate Upcycling Polyhydroxybutyrate PETase co-cultivation Yarrowia lipolytica Pseudomonas stutzeri

Quanti?cation of Tyrosine Hydroxylase and Erb B4 in the Locus Coeruleus of Mood Disorder Patients Using a Multispectral Method to Prevent Interference with Immunocytochemical Signals by Neuromelanin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2019年第2期35卷 205-215页

作者： Lei Guo Jochem StormmesAND zheng Fang qingbin Zhu Rawien Balesar Joop van Heerikhuize Arja Sluiter Dick Swaab Ai-Min Bao Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital Institute of NeuroscienceNHC and CAMS Key Laboratory of Medical NeurobiologyZhejiang University School of Medicine Netherlands Institute for Neuroscience Institute of the Royal Netherlands Academy of Arts and Sciences Department of Neurology Sir Run Run Shaw HospitalZhejiang University School of Medicine

The locus coeruleus(LC) has been studied in major depressive disorder(MDD) and bipolar disorder(BD). A major problem of immunocytochemical studies in the human LC is interference with the staining of the immunocytochemical end-product by the omnipresent natural brown pigment neuromelanin. Here, we used a multispectral method to untangle the two colors: blue immunocytochemical staining and brown *** found significantly increased tyrosine hydroxylase(TH) in the LC of MDD patients—thus validating the method—but not in BD patients, and we did not find significant changes in the receptor tyrosine-protein kinase ErbB4 in the LC in MDD or BD patients. We observed clear co-localization of ErbB4, TH, and neuromelanin in the LC neurons. The different stress-related molecular changes in the LC may contribute to the different clinical symptoms in MDD and BD.

关键词： Major depressive disorder Bipolar disorder Tyrosine hydroxylase ErbB4 Locus coeruleus

在线全文

学校读者我要写书评

暂无评论

基于血流向量测量颈动脉血流量的稳定性研究

实用临床医药杂志 2023年第3期27卷 29-34页

作者：刘微丽吴徐峰郑庆斌孟丽君冯亚平姜雪川李玉呈袁文杰扬州大学附属医院重症医学科江苏扬州225009 江苏省盐城市第一人民医院重症医学科江苏盐城224006

目的探讨基于血流向量测量颈动脉血流量的不同方法及其稳定性。方法选取健康志愿者15例和40例患者为研究对象,5名重症医学科医师采用三角函数双切面测量法、三角函数单切面测量法、横切固定角度测量法、纵切测量法、最大血流速度近似... 详细信息

目的探讨基于血流向量测量颈动脉血流量的不同方法及其稳定性。方法选取健康志愿者15例和40例患者为研究对象,5名重症医学科医师采用三角函数双切面测量法、三角函数单切面测量法、横切固定角度测量法、纵切测量法、最大血流速度近似法、流速均值近似法和改良环形近似法通过超声检查对颈总动脉血流量进行测量,并对测量结果进行稳定性分析以寻找稳定性较好的血流量的测量方法。结果三角函数单切面测量法稳定性高于三角函数双切面测量法、横切固定角度测量法、纵切测量法,差异有统计学意义(P0.05)。改良环形近似法与最大血流速度近似法的稳定性比较,差异无统计学意义(P>0.05),但分析结果显示,前者的稳定性优于后者,差异有统计学意义(P<0.05)。结论三角函数单切面测量法可测得较为稳定的血流速度。颈动脉斑块患者采用改良环形近似法可获得较稳定的血流量,但评估稳定性仍然有待进一步提高。

关键词：向量速度血流量稳定性改良环形近似法颈动脉三角函数

腹腔镜右半结肠癌根治术中使用血管结扎束34例病例报告

在线全文

学校读者我要写书评

暂无评论

中华普外科手术学杂志（电子版） 2017年第2期11卷 108-110页

作者：贺万斌邓祥兵吴清斌古朝阳郑二良王存于永扬周总光王自强四川大学华西医院胃肠外科中心成都610041

目的探讨腹腔镜右半结肠癌根治术中使用血管结扎束(Liga Sure)进行手术的效果及短期安全性评价。方法回顾性分析2013年11月至2017年2月使用血管结扎束进行的34例腹腔镜右半结肠癌根治术患者的临床资料。收集患者术中、术后资料,分析患... 详细信息

目的探讨腹腔镜右半结肠癌根治术中使用血管结扎束(Liga Sure)进行手术的效果及短期安全性评价。方法回顾性分析2013年11月至2017年2月使用血管结扎束进行的34例腹腔镜右半结肠癌根治术患者的临床资料。收集患者术中、术后资料,分析患者使用血管结扎束的效果及安全性。结果纳入的34例患者均顺利完成手术,手术时间(174.0±28.3)min,出血量(34.0±33.5)ml,无术中并发症,无损伤肠系膜上血管主干病例发生;2例患者发生乳糜漏,2例患者出现系膜破损,术后平均住院时间(6.0±4.6)d。平均获检淋巴结数量为24枚,阳性约1.2枚,共有15例患者伴有淋巴结转移。结论通过上述结果,使用Liga Sure进行的病例中无严重并发症发生,出血少,手术时间短,Liga Sure可用于腹腔镜右半结肠癌根治术的游离,短期效果及安全性均较好。

关键词：结肠肿瘤腹腔镜检查结肠切除术血管结扎束

Supramolecular liquid barrier for sulfur mustard utilizing host-guest complexation of pillar[5]arene with triethylene oxide substituents

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2023年第4期34卷 254-257页

作者： Yahan Zhang Junyi Chen Longming Chen Liang Zhao Mengke Ma Xinbei Du Zhao Meng Han Zhang Zhibing zheng Yongan Wang Chunju Li qingbin Meng State Key Laboratory of Toxicology and Medical Countermeasures Beijing Institute of Pharmacology and ToxicologyBeijing 100850China Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry Ministry of EducationTianjin Key Laboratory of Structure and Performance for Functional MoleculesCollege of ChemistryTianjin Normal UniversityTianjin 300387China

Sulfur mustard(SM) can be absorbed by skin quickly and cause serious system damage via reacting with nearly all cell constituents. Until now, there is still lack of effective antidotal therapy for SM and skin protection is highly important to defend SM. In this article, supramolecular liquid barrier based on pillar[5]arene with triethylene oxide substituents(EGP5) has been designed to impede the skin permeation of SM and further interaction with the skin tissue. EGP5 could encapsulate SM within its cavity, with a Kavalue of(5.10 ± 0.47) × 10^(2)L/mol. In vitro skin absorption test proved that EGP5 was capable to effectively prevent SM from penetrating through skin. This supramolecular liquid barrier was employed on rat models to systematically evaluate protective effect against SM intoxication. Pretreatment of EGP5could alleviate skin and system damage induced by SM and improve survival rate of poisoned rat models from 10% to 90%. Additionally, EGP5 served as protective materials could be highly reused after recycling several times. Overall, these findings have provided the first insight into the construction of convenient liquid material for SM protection.

关键词： Supramolecular barrier Host-guest complexation Liquid pillararene Sulfur mustard Skin protection

中性粒细胞淋巴细胞比值对术后并发颅内感染患者的预测价值

在线全文

学校读者我要写书评

暂无评论

中华神经创伤外科电子杂志 2019年第5期5卷 265-268页

作者：王玉荣郑庆斌韦广发孟丽君冯庆玲袁文杰欧金磊刘微丽李勇扬州大学附属医院重症医学科

目的探讨术后中性粒细胞淋巴细胞比值(NLR)动态变化对颅脑外伤术后患者颅内感染的预测价值.方法选取扬州大学附属医院重症医学科自2012年1月至2018年12月收治的116例颅脑外伤并发术后颅内感染患者.根据患者术后第3天NLR的检测结果,NLR≥... 详细信息

目的探讨术后中性粒细胞淋巴细胞比值(NLR)动态变化对颅脑外伤术后患者颅内感染的预测价值.方法选取扬州大学附属医院重症医学科自2012年1月至2018年12月收治的116例颅脑外伤并发术后颅内感染患者.根据患者术后第3天NLR的检测结果,NLR≥3为高NLR组,NLR<3为低NLR组,比较2组患者的临床预后情况.结果高NLR组患者在术后第3天NLR值明显升高,与低NLR组比较差异具有统计学意义(2.24±0.68vs4.72±1.21,P<0.05).高NLR组患者颅内感染发生10例(19%),低NLR组颅内感染发生4例(6%),2组比较差异具有统计学意义(P=0.033).NLR:曲线下面积(AUC)=0.894,95%CI:0.795~0.993;PCT:AUC=0.895,95%CI:0.764~1.027;CRP:AUC=0.898,95%CI:0.814~0.981.高NLR组患者ICU入住时间和机械通气时间均长于低NLR组,差异具有统计学意义(18.4±8.7vs13.2±5.4,P=0.000;10.3±4.7vs5.3±4.1,P=0.000).高NLR组患者病死率高于低NLR组,差异具有统计学意义(P=0.026).结论术后升高的NLR对颅脑外伤术后患者颅内感染的发生具有较好的临床预测价值,升高的NLR值和不良预后密切相关.

关键词：中性粒细胞淋巴细胞比值颅脑外伤颅内感染