检索结果-南通市图书馆

Cucurbit[8]uril-regulated face-to-face dimerization assembly enhanced photosensitization and photocatalysis

Science China Chemistry 2024年第5期67卷 1605-1612页

作者： Haigen Nie die hu Zhiyao Zeng Yan Fan Yaxin Zhai Xin-Long Ni Key Laboratory of Chemical Biology and Traditional Chinese Medicine Ministry of Educational of ChinaKey Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceCollege of Chemistry and Chemical EngineeringHunan Normal UniversityChangsha 410081China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of PhysicsHunan Normal UniversityChangsha 410081China

In water, N,N′-diarylpyridinium thiazolo[5,4-d]thiazole guests(G1–G3) were encapsulated by cucurbit[8]uril(Q[8]) to construct Q[8]_(3)/G_(2) complexes, in which the encapsulated G molecules exist as an exact face-to-face dimer. These complexation behaviors have been indicated by proton nuclear magnetic resonance(~1H NMR) spectroscopy and isothermal titration calorimetry(ITC),and have been confirmed by X-ray single crystal structural analysis of Q[8]_(3)/G2_(2). While free guests G1–G3 have no ability to sensitize singlet oxygen, they all become effective singlet oxygen sensitizers when complexed with Q[8]. By irradiation of white light, Q[8]_(3)/G_(2) complexes induced selective oxidation of aryl sulfide to aryl sulfoxide in good yields and selective oxidation of dimethyl sulfide(DMS) to dimethyl sulfoxide(DMSO) in excellent yields without over-oxidation to dimethyl sulfone(DMSO_(2))even for elongated irradiation. High-yield photo-oxidation of DMS to DMSO_(2) was only achieved by irradiation of blue light in the presence of Q[8]_(3)/G1_(2), which was also effective in photobleaching of Rhodamine B in water. The higher photo-oxidation power of Q[8]_(3)/G1_(2) has been ascribed to an additional generation of reactive oxygen species besides singlet oxygen.

关键词： host-guest interaction dimerization macrocycles photosensitization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of Piriformospora indica on the Respiration of Taxus chinensis *** under Water Stress

引用

Phyton-International Journal of Experimental Botany 2021年第6期90卷 1661-1672页

作者： Longsheng hu Xinru He Pujie Wei Bing Sun Yongjun Fei die hu College of Horticulture and Gardening Yangtze UniversityJingzhou434025China

Seedlings of Taxus chinensis *** were used as experimental materials to study the adaptation of Piriformospora indica to this plant under water *** materials were divided into two groups,namely,with or without inoculation with *** group was subjected to four different levels of water *** and physiological and biochemical indexes of the roots of *** *** were regularly *** water stress,*** *** had significantly decreased root vitality;root vitality was higher in inoculated roots than in uninoculated *** intense water stress,the inoculated roots had a higher soluble sugar content than the uninoculated *** water stress,*** *** experienced decreased activity of aerobic respiratory metabolic *** activity of anaerobic respiratory metabolic enzymes and alcohol dehydrogenase initially increased and then decreased,whereas that of lactate dehydrogenase *** inoculated roots had a higher activity of respiratory metabolic enzymes than the uninoculated *** water stress was further intensified,the roots had significantly decreased activity of aerobic respiratory metabolic enzymes and significantly increased activity of anaerobic respiratory metabolic *** activity of respiratory metabolic enzymes decreased faster in the uninoculated roots than in the inoculated *** study demonstrated that Piriformospora indica plays a positive role in enhancing the antihypoxic ability of *** ***,thereby alleviating plant damage due to water stress.

关键词： Taxus chinensis var.mairei Piriformospora indica water stress respiration

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Formation behaviors of rod-like reactive shaped charge penetrator and their effects on damage capability

引用

Defence Technology（防务技术） 2024年第2期32卷 242-253页

作者： Tao Sun Haifu Wang Shipeng Wang Chao Ge die hu Pengwan Chen Yuanfeng Zheng Beijing Institute of Technology State Key Laboratory of Explosion Science and TechnologyBeijing100081China Xi'an Institute of Electromechanical Information Technology Xi'an710065China

Formation behaviors of rod-like reactive shaped charge penetrator(RRSCP)and their effects on damage capability are investigated by experiments and numerical *** pulsed X-ray technology and a spaced aluminum/steel plate with the thicknesses of 5 mm/100 mm are *** types of sphericalsegment aluminum-polytetrafluoroethylene-copper(Al-PTFE-Cu)reactive liners with Cu contents of 0%,46.6%,and 66%are fabricated and *** experimental results show that the reactive liners can form excellent rod-shaped penetrators with tail skirts under the shaped charge effect,but the tail skirts disappear over ***,rupturing damage to the aluminum plate and penetration to the steel plate are caused by the RRSCP *** simulation analysis,the RRSCP is formed by a mechanically and chemically coupled response with the reactive liner activated by shock in its outer walls and bottom and then backward overturning,forming a leading reactive penetrator and a following chemical energy *** unique formation structure determines the damage modes of the aluminum plate and the steel *** analysis indicates that the formation behaviors and damage capability of Al-PTFE-Cu RRSCP strongly depend on Cu *** increasing Cu content,the velocity,activation extent,and reaction extent of Al-PTFE-Cu RRSCP decrease,which contribute to elongation and alleviate the negative effects of chemical reactions on elongation,significantly increasing the length-diameter ratio and thus enhancing the capability of steel plate ***,the lower activation extent and energetic density will weaken the RRSCP's capability of causing rupturing damage to the aluminum plate.

关键词： Reactive materials Al-PTFE composites Reactive liner X-ray Penetration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Familial amyloid cardiomyopathy masquerading as chronic Guillain-Barre syndrome： things are not always what they seem

引用

Frontiers of Medicine 2017年第2期11卷 293-296,F0004页

作者： die hu Ling Liu Shuguang Yuan Yuhong Yi Daoquan Peng Department of Cardiovascular Medicine the Second Xiangya Hospital Central South University Changsha 410011 China Department of Nephrology the Second Xiangya Hospital Central South University Changsha 410011 China

Familial amyloid cardiomyopathy is a challenging condition that mimics many other diseases, particularly in patients with pronounced neurological presentations and unexplained or equivocal cardiac abnormalities. In this case, a 57-year-old man was admitted for outpatient cardiological evaluation of progressive right heart failure and limb paraesthesias. The patient presented with hypertension, chronic Guillain-Barre syndrome, and sick sinus syndrome. Transthoracic echocardiograms showed a thickened ventricular wall and enlarged atrium. Tissue Doppler showed a restrictive filling pattern. Transthyretin （TTR）-associated amyloidosis, which was revealed by abdominal fat-pad biopsy and DNA analysis, explained the concurrence of independent pathological features, including neuropathy and cardiac involvement. Genetic testing identified a G 〉 T mutation in exon 4 of the transthyretin （TTR） gene. This mutation resulted in the alanine-to-serine substitution at amino acid position 117. Moreover, genetic testing confirmed that the patient＇s asymptomatic son carried the same amyloidogenic TTR mutation. Given these findings, the diagnosis of familial amyloid cardiomyopathy, which was misdiagnosed as chronic Guillain-Barre syndrome, was proposed.

关键词： transthyretin (TTR) cardiac amyloidosis sick sinus syndrome chronic Guillain-Barre syndrome

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Magnetic Co-doped 1D/2D structuredγ-Fe_(2)O_(3)/MoS_(2) effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways

引用

Frontiers of Environmental Science & Engineering 2024年第3期18卷 143-159页

作者： Junge Xu Dong Wang die hu Ziwei Zhang Junhong Chen Yingmu Wang Yifeng Zhang College of Civil Engineering Fuzhou UniversityFuzhou 350116China China Nuclear Power Engineering Co. Ltd.Shenzhen 518120China Department of Environmental&Resource Engineering Technical University of DenmarkLyngby DK-2800Denmark

Iron-based catalysts have been widely used to treat refractory organic pollutants in *** this paper,magnetic Co-γ-Fe_(2)O_(3)was synthesized by a facile tartaric acid-assisted hydrothermal method,and Co-γ-Fe_(2)O_(3)/MoS_(2) nanocomposite catalyst was obtained via in situ growth of MoS_(2) nanosheets on Co-γ-Fe_(2)O_(3)*** nanocomposite catalysts were used to decompose bisphenol A(BPA)by activating peroxymonosulfate(PMS).It was shown that only 0.15 g/L catalyst and 0.5 mmol/L PMS degraded 10 mg/L of BPA(99.3%within 10 min)in the pH range of 3–*** was activated due to redox cycling among the pairs Co(III)/Co(II),Fe(III)/Fe(II),and Mo(VI)/Mo(IV).Quenching experiments and electron paramagnetic resonance spectroscopy demonstrated that both radical and non-radical pathways were involved in BPA degradation,in which active radical sulfate radical and non-radical singlet oxygen were the main reactive oxygen *** intermediates were identified by liquid chromatography-coupled mass spectrometry,and three possible BPA degradation pathways were *** toxicity of several degradation intermediates was lower,and Co-γ-Fe_(2)O_(3)/MoS_(2) exhibited excellent reusability and could be magnetically recovered.

关键词： Magnetic Co-γ-Fe_(2)O_(3) /MoS_(2) Hydrothermal method Bisphenol A Degradation pathways Toxicity analysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nanoparticle delivery for central nervous system diseases and its clinical application

引用

Nano Research 2024年第7期17卷 6305-6322页

作者： Lin Tang Rui Zhang Yusi Wang Mohan Liu die hu Yuanda Wang Li Yang Department of Biotherapy Cancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengdu 610041China

In the treatment of central nervous system(CNS)diseases such as glioma,Alzheimer's disease(AD)and Parkinson's disease(PD),drugs are expected to reach specific areas of the brain to achieve the desired *** a growing number of therapeutic targets have been identified in preclinical studies,the ones that can ultimately be used in the clinic are ***,the research process and clinical application of drugs for treating CNS diseases are still large *** barriers such as the blood‒brain barrier(BBB)act as selective permeable membranes,allowing only certain molecules to enter the brain;this barrier is the major obstacle restricting the arrival of most drugs to brain ***,nanoparticles,including lipid-based,cell-derived biomimetic,polymeric and inorganic nanoparticles,have gained increasing attention because of their ability to cross physiological barriers,and could play an important role as delivery carriers and ***,clinical applications of nanoparticles in CNS diseases are *** review focuses on the progress of current research on the use of nanoparticles for the treatment of CNS diseases to provide additional insight into the treatment of CNS diseases.

关键词： nanoparticles central nervous system(CNS)diseases clinical applications delivery carriers immunomodulators

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of Xiaochuanping powder on the inflammatory response and airway remodeling in asthmatic rats

引用

Journal of Traditional Chinese Medicine 2018年第1期38卷 61-66页

作者： Zhou Tao Zhang Nianzhi hu die Wang Wendong Xu Shunfu Chen Xu Department of biochemistry and molecular biology Anhui University of Chinese Medicine Department of respiratory medicine the First Affiliated Hospital of Anhui University of Chinese Medicine

OBJECTIVE： To observe the effect of Xiaochuanping powder （XP）, a traditional Chinese prescrip- tion for the treatment of cough and asthma, on serum concentrations of eosinophil cationic protein （ECP）, tumor necrosis factor （TNF）-a, and interleu- kin （IL）-4, eosinophil counts, as well as expression of matrix metalloproteinase （MMP）-9, tissue inhibi- tor of metalloproteinase （TIMP）-I in the lung tissues of asthmatic rats. METHODS： Sixty clean-grade Sprague-Dawley rats were divided randomly into six groups： normal control （NC）, asthma model, Guilong Kechuanning （GK） group, as well as high, intermediate-, and lowdose XP groups. Rats were sensitized with ovalbu- min （OVA） to trigger asthma. Serum concentrations of ECP, TNF-a and IL-4, eosinophil counts, as well as expression of MMP-9 and TIMP-1 in lung tissues were evaluated using an immunofluorescence method, mRNA expression of MMP-9 and TIMP-1 was determined using real-time quantitative poly- merase chain reaction. RESULTS： Compared with the asthma-model group, serum concentrations of ECP, TNF-a, and IL-4, and eosinophil counts decreased significantly in the high- and intermediate-dose XP groups and GK group （all P 〈 0.01）. Protein expression of MMP-9 and TIMP-1 decreased significantly in the high- and intermediate-dose XP groups and GK group （all P 〈 0.01）. Transcription of MMP-9 and TIMP-1 mRNA and the ratio of expression of MMP-9：TIMP-1 in lung tissue were significantly lower （P 〈 0.01）. CONCLUSION： XP can reduce TNF-a secretion, sup- press the infiltration/activation of eosinophils, re- duce serum concentrations of ECP and IL-4, reduce the protein and mRNA expression of MMP-9 and TIMP-1 in lung tissue, and regulate the balance between expression of MMP-9 and TIMP-1. In these ways, XP alleviated the inflammation and remodel- ing of the airways.

关键词： Asthma Airway remodeling Eosino- phils Eosinophil cationic protein Matrix metallo- proteinase 9 Tumor necrosis factor-alpha Tissue in- hibitor of metalloproteinase-1 Xiaochuanping powder

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Bridging the Gap between Western and Chinese Evidence in the International Education Market

引用

China & World Economy 2014年第6期22卷 87-102页

作者： Wen Wen Yan Luo die hu Institute of Education Tsinghua University Department of Education Stanford University

Using a sample of 1674 international students in China, the present study explores sociocultural adaptation and its determinants. The results indicate that sociocultural adaptation among international students＂ in China is largely shaped by the nature of the interaction with host nationals. In particular, among international students, those who experienced higher levels of social interaction with host nationals and received more social support were better poised for sociocultural adaptation. Rather contrary to similar research in the Western context, the study finds that international students from East Asia actually experienced more sociocultural difficulties in China than their counterparts from Western countries. These findings suggest the possibility of China and other oriental countries with sound higher education systems playing more active roles in the global higher education market.

关键词： China International education market sociocultural adaptation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Comparison of Morphological and Anatomical Characteristics of Taxus chinensis *** Seedlings Root under Waterlogging Stress in Different Substrates

引用

Phyton-International Journal of Experimental Botany 2021年第6期90卷 1673-1684页

作者： Xinru He Qiong Ding Bing Sun Yongjun Fei die hu College of Horticulture and Gardening Yangtze UniversityJingzhou434025China

Four different ratios of river sand,ceramic pellets,vermiculite and perlite(1:1),and field soil were selected as the substrates in this experiment,and four gradient levels of root waterlogging,half waterlogging,full waterlogging and normal were set to investigate the effects of different gradients of waterlogging stress on the root morphology of Taxus chinensis *** seedlings under different *** this study,the root anatomical structure of Taxus chinensis *** under different waterlogging stress was observed by the paraffin section *** roots of *** *** were diarch,with no pith and resin *** was a large number of tannins in the pericycle of the aerial adventitious roots of seedlings adapted to ***,the endodermis has obvious casparian strip thickening,and there were 4-5 layers of large parenchymatous cells in the close to the inner side of the pericycle in the vascular cylinder,which could increase the storage capacity,and transport capacity of the *** the treatment of root waterlogging stress,the development of plant roots in the mixed substrate of vermiculite and,perlite was the *** half waterlogging stress,*** *** seedlings treated with various substrates all could better adapt to the environment of waterlogging *** the stress of fully waterlogging,the roots of seedlings planted in river sand substrate developed secondary growth.

关键词： Waterlogging stress Taxus chinensis var.mairei root morphological anatomy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Enzymatically prepared alginate oligosaccharides improve broiler chicken growth performance by modulating the gut microbiota and growth hormone signals

引用

Journal of Animal Science and Biotechnology 2023年第5期14卷 2107-2127页

作者： A La Teng Zhu La Yuqing Feng die hu Yimei Feng Xiaolu Jin Dan Liu Yuming Guo Gong Cheng Yongfei hu State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Background Alginate oligosaccharide(AOS)holds great potential as a novel feed supplement in farm ***,the effects of AOS on chicken health and the underlying mechanisms are not fully *** study aimed to optimize the enzymatic preparation of AOS by using bacterial alginate lyases expressed in yeast,investigate the effects of the prepared AOS on the growth performance and gut health of broiler chickens,and reveal the underlying *** Five alginate lyases from bacteria were cloned into Pichia pastoris GS115 and the alginate lyase PDE9 was expressed at relatively high yield,activity and stability in *** trials were carried out using 3201-day-old male Arbor Acres broilers(four groups;8 replicates/group×10 chicks/replicate)receiving either a basal diet or the same diet supplemented with 100,200 and 400 mg/kg PDE9-prepared AOS for 42 *** results showed that dietary supplementation of 200 mg/kg AOS displayed the highest activity in promoting the birds’ADG and ADFI(P<0.05).AOS ameliorated the intestinal morphology,absorption function and barrier function,as indicated by the enhanced(P<0.05)intestinal villus height,maltase activity,and the expression of PEPT,SGLT1,ZNT1,and *** also increased serum insulin-like growth factor-1,ghrelin(P<0.05),and growth hormone(P<0.1).Moreover,the concentrations of acetate,isobutyrate,isovalerate,valerate,and total SCFAs in cecum of birds fed AOS were significantly higher than the control birds(P<0.05).Metagenomic analysis indicated that AOS modulated the chicken gut microbiota structure,function,and microbial interactions and promoted the growth of SCFAs-producing bacteria,for example,Dorea sp.002160985;SCFAs,especially acetate,were found positively correlated with the chicken growth performance and growth-related hormone signals(P<0.05).We further verified that AOS can be utilized by Dorea *** grow and to produce acetate in *** We demonstrated that the enzymatically

关键词： Acetate Alginate lyases Alginate oligosaccharides Dorea sp. Gut microbiota

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：