检索结果-南通市图书馆

Integrating Homogeneous and Heterogeneous Catalysis in a Copper Nanocluster with Lewis Acid–Base Sites for Chemical Conversion of CO_(2) and Propargylamine

引用

CCS Chemistry 2024年第9期6卷 2131-2141页

作者： wan-Zhen qiao Yu-Jue wang Si Li rui wang Jie Wu Shuang-quan Zang Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis and College of ChemistryZhengzhou UniversityZhengzhou 450001

It remains a significant challenge to develop a catalyst that merges the advantages of homogeneous and heterogeneous catalysis with high reactivity and great ***,an atomically precise Cu_(6)-NH_(2) nanocluster with distorted octahedral Cu_(6) core and NH_(2)-functionalized ligands has been developed as the first homo/heterogeneous catalyst to catalyze the cyclization reaction of propargylic amines with carbon dioxide(CO_(2))under mild *** a homogeneous catalyst,Cu_(6)-NH_(2) shows excellent catalytic activity with high turnover frequency due to highly accessible active *** definite coordination geometry and homogeneity nature of active centers make it convenient to investigate the structure–activity relationship at the atomic level through experiments and theory *** addition,the nanocluster exhibits excellent stability,great recrystallizability,and reusability in five catalytic cycles,in which its catalytic performance has no obvious ***,Cu_(6)-NH_(2) incorporates Lewis acid and base sites in metal and ligand,respectively,which can promote catalytic efficiency in a synergistic effect in the absence of any ***,Cu_(6)-NH_(2) can realize direct conversion of CO_(2) in simulated flue gas into oxazolidinones with high *** metal-ligand cooperative effect and integrated advantages of homogeneous and heterogeneous catalysis would provide new perspectives to achieve advanced metal nanocluster catalysts for CO_(2) conversion.

关键词： copper nanocluster atomically precise structure Lewis acid-base sites CO_(2)cyclization reaction cocatalyst-free

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

The evolution and diurnal expression patterns of photosynthetic pathway genes of the invasive alien weed,Mikania micrantha

引用

Journal of Integrative Agriculture 2024年第2期23卷 590-604页

作者： Kangkang wang Mengjiao Jin Jingjing Li Yesong ren Zaiyuan Li Xinghai ren Cong Huang Fanghao wan wanqiang qian Bo Liu Shenzhen Branch Guangdong Laboratory of Lingnan Modern Agriculture/Genome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China Shenzhen research Institute of Henan University Shenzhen 518000China

Mikania micrantha is a fast-growing global invasive weed species that causes severe damage to natural ecosystems and very large economic losses of forest and crop *** has advantages in photosynthesis,including a similar net photosynthetic rate as C4 plants and a higher carbon fixation *** used a combination of genomics and transcriptomics approaches to study the evolutionary mechanisms and circadian expression patterns of *** ***,16 positive selection genes focused on photoreaction and utilization of *** different tissues,98.1%of the genes associated with photoresponse had high expression in stems,and more than half of the genes of the C4 cycle had higher expression in stems than in *** stomatal opening and closing,2 genes of carbonic anhydrase(CAs)had higher expression at 18:00 than at 8:00,and the slow anion channel 1(SLAC1)and high-leaf-temperature 1 kinase(HT1)genes were expressed at low levels at 18:*** addition,genes associated with photosynthesis had higher expression levels at 7:00 and 17:*** hypothesized that *** may undergo photosynthesis in the stem and flower organs and that some stomata of the leaves were opening at night by CO_(2)*** addition,its evolution may attenuate photoinhibition at high light intensities,and enhance more efficient of photosynthesis during low light *** the tissue-specific photosynthetic types and different diurnal pattern of photosynthetic-related genes may contribute to its rapid colonization of new habitats of ***.

关键词： invasion plant Mikania micrantha photosynthesis stomata stem

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

Evaluating the Compatibility Mechanism of Shengxian Decoction Based on an Excretion Study of 18 Bioactive Constituents in rat Biosamples

引用

World Journal of Traditional Chinese Medicine 2024年第1期10卷 40-52页

作者： Tao Pang Nan Weng Yong Chen Cui-Yun Huang Mei Sun Feng Zhang wan-Sheng Chen Department of Pharmacy Changzheng HospitalNaval Medical University(Second Military Medical University)ShanghaiChina Department of Pharmacognosy Shenyang Pharmaceutical University ShenyangLiaoning ProvinceChina Traditional Chinese Medicine resource and Technology Center Shanghai University of Traditional Chinese MedicineShanghaiChina

Introduction:The Shengxian decoction(SXT),a Chinese herbal medication used to treat heart failure,is composed of Astragali radix,Anemarrhenae rhizoma,Bupleuri radix,Cimicifuage rhizoma,and Platycodonis *** of the excretion of the active compounds in this herbal medication is vital for investigating the underlying mechanisms behind its ***,this remains ***:Liquid chromatography coupled with mass spectrometry was performed in both positive and negative modes to assay 18 constituents of SXT from rat urinary,fecal,and biliary ***:The methodology was validated and showed good linearity(r≥0.9),precision,stability,repeatability,and *** relative standard deviations and relative errors for the precision and accuracy did not exceed 15%.The recoveries of all the compounds ranged from 77.37%to 114.82%,and the matrix effect was between 82.53%and 105.71%.The results suggested that,when combined with Platycodonis radix,the levels of 14 constituents from the four herbs were reduced in the urine,while the levels of six constituents were reduced in the ***:The comparative excretion results indicated that Platycodonis radix reduced the excretion of compounds in SXT,demonstrating the compatibility mechanism and holistic properties of these compounds,favoring the pharmacological effects of SXT.

关键词： Compatibility excretion liquid chromatography coupled with mass spectrometry Platycodonis radix Shengxian decoction

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

In situ digital testing method for quality assessment of soft soil improvement with polyurethane

引用

Journal of rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1732-1748页

作者： X.F.wang C.J.wang W.V.Yue Z.J.Zhang Z.q.Yue Department of Civil Engineering China University of Geosciences (Beijing)BeijingChina Department of Water Science and Engineering Zhengzhou UniversityZhengzhouChina Department of Geotechnical Engineering Tongji UniversityShanghaiChina Department of Civil Engineering The University of Hong KongChina

This study purposes an in situ testing method on quality assessment of soil *** drilling data includes the spatial distribution and in situ strength of untreated and treated soil along three different drillholes measured by on-site drilling monitoring *** factual drilling data can characterize the degree of soil improvement by penetration injection with permeable *** from on-site drilling monitoring shows that the linear zones represent constant drilling speeds shown in the plot of drill bit advancement *** drilling time,which indicates the spatial distributions of soil *** soil profile at the study site is composed of four layers,which includes fill,untreated silty clay,treated silty clay,and mucky *** results of soil profile are verified by the parallel site *** constant drilling speeds profile the coring-resistant strength of drilled *** comparing with the untreated silty clay,the constant drilling speeds of the treated silty clay have been decreased by 13.0-62.8%.Two drilling-speed-based indices of 61.2%and 65.6%are proposed to assess the decreased average drilling speed and the increased in situ strength of treated silty *** tests,*** compressive strength(UCS)test,have been performed with core sample to investigate and characterize in situ strength by comparing that with drilling *** show that the average predicted strengths of treated silty clay are 2.4-6.9 times higher than the average measured strength of untreated silty *** UCS-based indices of 374.5%and 344.2%verified the quality assessment(qA)results by this new in situ *** method provides a cost-effective tool for quality assessment of soil improvement by utilizing the digital drilling data.

关键词： Drilling process monitoring system Hydraulic rotary drilling process Constant drilling speed Soil improvement quality assessment

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

A comprehensive review on the resynthesis of ternary cathode active materials from the leachate of Li-ion batteries

引用

Journal of Energy Chemistry 2024年第8期95卷 446-463,I0010页

作者： Dongwoo Kim Hyeoncheol Joo Chanmin Kim Seoa Kim wan-Yi Kim Sangwoo Han Joongkil Park Soyeon Park Heechul Jung Sanghyuk Park Kyungjung Kwon Department of Energy and Mineral resources Engineering Sejong UniversitySeoul 05006Republic of Korea LIB recycling research Group LIB Materials R&D CenterPOSCO HoldingsPohang 37859Republic of Korea Department of Future Energy Convergence Seoul National University of Science&Technology232 Gongreung-roNowon-guSeoul 01811Republic of Korea Autonomous Intelligent Unmanned Flying Vehicles Institute Sejong UniversitySeoul 05006Republic of Korea

This review highlights the importance of recovering valuable metals from spent Li-ion battery(LIB)cathodes through the resynthesis of cathode active materials(CAMs).The resynthesis process of CAMs,a promising recycling method that directly produces CAM precursors from LIB leachate,is *** process encompasses six key steps,including pretreatment,leaching,purification,adjustment of metal concentrations,precursor synthesis,and *** review also investigates the potential introduction of impurity elements during CAM resynthesis and provides tolerance levels for these impurities based on thorough reference ***,it addresses challenges related to the commercialization of the resynthesis ***,this review represents the first comprehensive assessment of CAM resynthesis,including the systematic evaluation of 12 impurity elements(Fe,Li,Al,Cu,C,P,F,Na,Cl,S,Mg,and Zn).Overall,this comprehensive review is poised to support the commercial development of resynthesized CAMs by offering valuable guidelines for managing impurities and streamlining the purification process.

关键词： Li-ion battery recycling resynthesis Leachate Impurity

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

Brain regulates weight bearing bone through PGE2 skeletal interoception: implication of ankle osteoarthritis and pain

引用

Bone research 2024年第1期12卷 107-121页

作者： Feng Gao qimiao Hu Wenwei Chen Jilong Li Cheng qi Yiwen Yan Cheng qian Mei wan James Ficke Junying Zheng Xu Cao Department of Orthopedic Surgery Johns Hopkins University School of MedicineBaltimoreMaryland 21205USA Department of Biomedical Engineering Johns Hopkins University School of MedicineBaltimoreMaryland 21205USA

Bone is a mechanosensitive tissue and undergoes constant remodeling to adapt to the mechanical loading ***,it is unclear whether the signals of bone cells in response to mechanical stress are processed and interpreted in the *** this study,we found that the hypothalamus of the brain regulates bone remodeling and structure by perceiving bone prostaglandin E2(PGE2)concentration in response to mechanical *** PGE2 levels are in proportion to their weight *** weight bearing changes in the tail-suspension mice,the PGE2 concentrations in bones change in line with their weight bearing *** of cyclooxygenase-2(COX2)in the osteoblast lineage cells or knockout of receptor 4(EP4)in sensory nerve blunts bone formation in response to mechanical ***,knockout of TrkA in sensory nerve also significantly reduces mechanical load-induced bone ***,mechanical loading induces cAMP-response element binding protein(CrEB)phosphorylation in the hypothalamic arcuate nucleus(ArC)to inhibit sympathetic tyrosine hydroxylase(TH)expression in the paraventricular nucleus(PVN)for ***,we show that elevated PGE2 is associated with ankle osteoarthritis(AOA)and ***,our data demonstrate that in response to mechanical loading,skeletal interoception occurs in the form of hypothalamic processing of PGE2-driven peripheral signaling to maintain physiologic bone homeostasis,while chronically elevated PGE2 can be sensed as pain during AOA and implication of potential treatment.

关键词： pain elevated PGE2

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

Isolation of exogenous fungi from Notoginseng radix et rhizoma and preliminary analysis of toxigenic fungi

引用

Journal of Future Foods 2024年第2期4卷 179-182页

作者： Lei Zhou Xiangsheng Zhao Xiaomin Liu Hefang wan Chun Sui Xuyu Chen Key Laboratory of Bioactive Substances and resources Utilization of Chinese Herbal Medicine Ministry of EducationNational Engineering Laboratory for Breeding of Endangered Medicinal MaterialsInstitute of Medicinal Plant Development(IMPLAD)Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100193China Hainan Provincial Key Laboratory of resources Conservation and Development of Southern Medicine Hainan Branch of the Institute of Medicinal Plant DevelopmentChinese Academy of Medical Sciences&Peking Union Medical CollegeHaikou 570311China

Notoginseng radix et rhizoma(Sanqi in Chinese)is a precious traditional Chinese herbal *** has the effect of dispersing blood stasis and stopping bleeding,reducing swelling and fixing ***,it tends to contaminate with harmful fungi during storage,which may make it much less *** order to understand the fungal contamination of Notoginseng radix et rhizoma and master its composition of the exogenous *** surface fungi of Notoginseng radix et rhizoma samples collected from six Chinese provinces and districts were investigated by using dilution plate *** of aflatoxins by UPLC-MS/*** results showed that Penicillium citrinum was dominantly isolated from Notoginseng radix et rhizoma samples from No.1 to *** flavus,which produces aflatoxin,was dominantly isolated from Notoginseng radix et rhizoma samples from No.5 and *** addition,kinds of mycotoxin were assayed which were produced by three of those identified *** three fungi strains produced aflatoxin B1(AFB1)and one strain HBSq1-5 additionally produced other three kinds of mycotoxin,AFB2,AFG1 and *** is the results implied that it will be very important to take serious cautions when using Notoginseng radix et *** well as,understanding the composition of the exogenous fungi of Notoginseng radix et rhizoma and the strains of toxin-producing fungi,which can play an important role in guiding the storage of Notoginseng radix et rhizoma.

关键词： Notoginseng radix et rhizoma Exogenous fungal Amplicon sequencing Mycotoxin

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

General and specialized metabolites in peanut roots regulate arbuscular mycorrhizal symbiosis

引用

Journal of Integrative Agriculture 2024年第8期23卷 2618-2632页

作者： Li Cui Jianguo wang Zhaohui Tang Zheng Zhang Sha Yang Feng Guo Xinguo Li Jingjing Meng Jialei Zhang Yakov Kuzyakov Shubo wan Institute of Crop Germplasm resources Shandong Academy of Agricultural Sciences/Scientific Observing and Experimental Station of Crop Cultivation in East ChinaMinistry of Agriculture and Rural AffairsJinan 250100China Shandong Academy of Agricultural Sciences Jinan 250100China Department of Soil Science of Temperate Ecosystems Department of Agricultural Soil ScienceUniversity of GöttingenGöttingen 37077Germany Peoples Friendship University of russia(rUDN University) Miklukho-Maklaya StMoscow 117198Russia Institute of Environmental Sciences Kazan Federal University420049 KazanRussia

Arbuscular mycorrhizae(AM)fungi form symbiotic associations with plant roots,providing nutritional benefits and promoting plant growth and defenses against various *** changes in the roots during AM fungal colonization are key to understanding the development and maintenance of these ***,we investigated metabolic changes in the roots of peanut(Arachis hypogaea L.)plants during the colonization and development of AM symbiosis,and compared them to uncolonized *** primary changes during the initial stage of AM colonization were in the contents and compositions of phenylpropanoid and flavonoid *** compounds function in signaling pathways that regulate recognition,interactions,and pre-colonization between roots and AM *** compounds decreased by 25%when the symbiosis was fully established compared to the initial colonization *** AM symbiosis was established,general metabolism strongly shifted toward the formation of lipids,amino acids,carboxylic acids,and *** compounds increased by 8.5%from the pre-symbiotic stage to well-established ***-phosphatidylcholines,which are signaling compounds,were only present in AM roots,and decreased in content after the symbiosis was *** the initial stage of AM establishment,the content of salicylic acid increased two-fold,whereas jasmonic acid and abscisic acid decreased compared to uncolonized *** jasmonic acid content decreased in roots after the symbiosis was well *** symbiosis was associated with high levels of calcium,magnesium,and D-(+)-mannose,which stimulated seedling ***,specific metabolites that favor the establishment of AM symbiosis were common in the roots,primarily during early colonization,whereas general metabolism was strongly altered when AM symbiosis was *** conclusion,specialized metabolites function as signaling compounds to establish AM *** compounds are no longe

关键词： Arachis hypogaea L. arbuscular mycorrhizae fungi metabolites symbiotic association

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

Two-year longitudinal change in choroidal and retinal thickness in school-aged myopic children:exploratory analysis of clinical trials for myopia progression

引用

Eye and Vision 2024年第4期10卷 1-10页

作者： Meiping Xu Xinping Yu Minghui wan Kemi Feng Junxiao Zhang Meixiao Shen BjÖrn Drobe Hao Chen Jia qu Jinhua Bao Eye Hospital and School of Ophthalmology and Optometry Wenzhou Medical UniversityWenzhouZhejiangChina National Clinical research Center for Ocular Diseases WenzhouZhejiangChina. WEirC WMU-Essilor International Research CenterWenzhouZhejiangChina r&D Vision Sciences AMErA EssilorInternationalSingaporeSingapore

Background:With increasing axial length(AL)and myopia progression,the micro-structure of the retina and choroid gradually *** study describes the longitudinal changes in retinal and choroidal thickness in school-aged children with myopia and explores the relationship between changes in choroidal thickness and myopia ***:An exploratory analysis of a randomized trial was ***(n=168,aged 7 to 12 years)with myopia from-0.75 diopter(D)to-4.00 D were enrolled in this prospective longitudinal *** refraction,AL,retinal and choroidal thicknesses were measured at baseline and at 1-and 2-year follow-ups."rapid progression myopia"was defined as increasing in myopia>1.00 D and'"stable progression myopia"was≤1.00 D during the 2-year *** affecting the changes in choroidal thickness were analysed using linear mixed ***:AL significantly increased by 0.67±0.24 mm with a myopic shift of-1.50±0.64 D over the 2 *** overall retinal thickness increased from 251.12±15.91μm at baseline to 253.47±15.74μm at the 2-year followup(F=23.785,Proidal thickness decreased from 231.03±54.04μm at baseline to 206.53±59.71μm at the 2-year follow-up(F=73.358,Proidal thinning was significantly associated with AL elongation(β=-43.579μm/mm,P=0.002)and sex(β=-17.258,P=0.001).Choroidal thickness continued to decrease in subjects with rapid progression(F=92.06,Progression(F=2.23,P=0.119).Conclusion:Significant choroidal thinning was observed and was associated with rapid progression and *** findings indicate a need to understand the role of the choroid in eye growth and myopia ***/Precis:The macular choroidal thickness of myopic children is relevant to different degrees of myopic progression in this 2-year longitudinal *** findings suggest that control of choroidal thickness might work to regulate human ocular growth.

关键词： Axial length Choroidal thickness Children Myopia Spectral-domain optical coherence tomography

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

SUV39H1-driven NFATc1 methylation is essential for the c-Cbl-mediated degradation of NFATc1 in an osteoclast lineage

引用

Genes & Diseases 2024年第4期11卷 86-89页

作者： Do-Won Jeong Hye-Jin Kim Jong-wan Park Seulbee Lee Hyeryeon Jung Eugene C.Yi Nacksung Kime Yang-Sook Chun Department of Biomedical Sciences Seoul National University College of MedicineSeoul 03080Republic of Korea Department of Physiology Seoul National University College of MedicineSeoul 03080Republic of Korea Ischemic/Hypoxic Disease Institute Seoul National University College of MedicineSeoul 03080Republic of Korea Department of Molecular Medicine and Biopharmaceutical Sciences Graduate School of Convergence Science and Technology and College of Medicine Or College of PharmacySeoul National UniversitySeoul 03080Republic of Korea Department of Pharmacology Chonnam National University Medical SchoolGwangju 61469Republic of Korea

Bone undergoes continuous remodeling by tightly-coordinated actions of bone-resorbing osteoclasts and boneforming osteoblasts.1 recent studies document that the dysregulation of histone methylation profiles is associated with the progression of ***,the specific epigenetic modifiers are incompletely *** this study,we demonstrate an inhibitory role of a variegation 3-9 homolog 1(SUV39H1)in osteoclast formation.

关键词： osteoclast remodeling incomplete

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

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：