检索结果-南通市图书馆

Two New Antibacterial Iridoids from Patrinia rupestris

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第3期17卷 337-340页

作者： xiu ping yang Cheng Shan YUAN Zhong Jian JIA State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000

Two new iridoids （1 and 2） were isolated from the roots of Patrinia rupestris （Pail.） Juss. Their structures were elucidated by spectroscopic methods. Compounds 1 and 2 exhibited strong antibacterial activities ag... 详细信息

关键词： Patrinia rupestris Valerianaceae iridoids antibacterial activity.

Two New Bisabolane Sesquiterpenes from Leontopodium longifolium

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第6期17卷 776-778页

作者： Ji Xin LI xiu ping yang Zhong Jian JIA State Key Laboratory of Applied Organic Chemistry College of Chemistry and Engineering Lanzhou University Lanzhou 730000

Two new bisabolane sesquiterpenes were isolated from the roots of Leontoptdium longifolium. Their structures were elucidated as 4α, 5α-diacetoxy-lα-angeloyloxybisabol-2, 9, ll-triene and 4α, 5α-diacetoxy-lα-ange... 详细信息

关键词： Leontopodium longifolium Compositae bisabolane sesquiterpene.

Dependence of Deformation Twinning on Grain Orientation and Texture Evolution of High Manganese TWIP Steels at Different Deformation Temperatures

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第11期18卷 46-52页

作者： FANG xiu-hui yang ping LU Fa-yun MENG Li School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Mechanical properties, microstructure and texture evolution were studied in two tensile-deformed high manganese TWIP steels at different temperatures. Special attention was paid to the effects of deformation tempera- ture and grain orientation on twinning behavior. The results showed that, at --70 ℃ and at room temperature, both twins and hexagonal martensite were found in a lower manganese steel of 26Mn. With deformation temperature ris- ing, twins became less and they disappeared at 500 ℃. Strong 〈111〉 texture appeared at 300 ℃, while it weakened at 500 ℃ due to the low strain rate and higher stacking fault energy. EBSD measurement revealed the dependence of deformation twinning on grain orientation at all test temperatures.

关键词： high manganese steel warm deformation TWIP effect texture

Gastric carcinoma with osteoclast-like giant cells:a case report and review of the literature

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第3期10卷 237-241页

作者： Li-duan ZHENG xiu-ping yang Hua-xiong PAN xiu NIE Jun HE Qing LV Qiang-song TONG Department of PathologyUnion Hospital of Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China Department of Surgery Union Hospital of Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 China

Gastric carcinoma with osteoclast-like giant cells （OGCs） is an extremely rare tumor. So far, only six cases have been reported in the literature. Here we report an additional case of this tumor in a Chinese 78-year-old man presented with abdominal pain, vomiting, and hematemesis. Physical examination and gastroscopy revealed a tumor in the gastric antrum. The biopsy and pathological findings indicated a gastric adenocarcinoma with OGCs, which were present in both the tumor and the metastatic lymph nodes. Further immunohistochemical staining indicated that OGCs were reactive with CD68, CD45, and vimentin protein, but not with pancytokeratin, carcinoembryonic antigen, or epithelial membrane antigen, suggesting the monocytic/histiocytic derivation of these OGCs. In situ hybridization for Epstein-Burr virus showed no nuclear positivity in either adenocarcinoma or OGCs. Postoperative follow-up showed that the patient had survived for at least 6 months without recurrence. Further investigation is warranted to clearly define the prognostic significance of OGCs in gastric carcinoma.

关键词： Gastric carcinoma Adenocarcinoma Osteoclast-like giant cell (OGC)

A New Iridoid Glycoside and a New Iridoid from Pedicularis kansuensis f. albiflora

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2003年第9期14卷 932-933页

作者： Cheng Shan YUAN, Wei Dong XIE, xiu ping yang, Zhong Jian JIADepartment of Chemistry, National Laboratory of Applied Organic Chemistry, Lanzhou University,Lanzhou 730000 Department of Chemistry Natl. Lab. of Appl. Organ. Chemistry Lanzhou University Lanzhou 730000 China

A new iridoid glycoside 1 and a new iridoid 2 were isolated from the whole plant of Pedicularis kansuensis f. albiflora. Their structures were elucidated by spectroscopie methods.

关键词： Pedicularis kansuensis f. albiflora Scrophulariaceae iridoid glycoside iridoid.

A New Sesquiterpene from Ligularia Songarica

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1999年第1期10卷 29-30页

作者： Bo FU xiu ping yang Jie WANG Zhong Jian JIA(Institute of Organic Chemistry, State Key Laboratory of Applied Organic Chemistry,Lanzhou University, Lanzhou, 730000) Institute of Organic Chemistry State Key Lab. of Appl. Organ. Chem. Lanzhou University Lanzhou 730000 China

A new bisabolane sesquiterpene, 5 beta-acetoxy-4 beta, 8-diangeloyloxy-2 beta,3 beta, :10,11-diepoxy-bisabola-7 (14)-ene, was isolated from the roots of Ligularia songarica and its structure was elucidated on the basi... 详细信息

关键词： bisabolane new sesquiterpene ligularia songarica

Changes in the Non-targeted Metabolomic Profile of Three-year-old Toddlers with Elevated Exposure to Polycyclic Aromatic Hydrocarbons

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2024年第5期37卷 479-493页

作者： LI yang LIN Dan ZHANG xiu Qin JU Guang xiu SU Ya ZHANG Qian DUAN Hai ping YU Wei Sen WANG Bing Ling PANG Shu Tao Department of Epidemiology and Health Statistics School of Public HealthQingdao UniversityQingdao 266021ShandongChina Department of Environmental Health Qingdao Municipal Center for Disease Control and PreventionQingdao Institute of Preventive MedicineQingdao 266033ShandongChina Physicochemical Laboratory Qingdao Municipal Center for Disease Control and PreventionQingdao Institute of Preventive MedicineQingdao 266033ShandongChina Section of Child Health Care Huangdao Maternity and Child Health Care Hospital of QingdaoQingdao 266499ShandongChina Qingdao Blood Center Qingdao 266071ShandongChina

Objective To investigate changes in the urinary metabolite profiles of children exposed to polycyclic aromatic hydrocarbons(PAHs)during critical brain development and explore their potential link with the intestinal *** Liquid chromatography-tandem mass spectrometry was used to determine ten hydroxyl metabolites of PAHs(OH-PAHs)in 36-month-old ***,37 children were categorized into low-and high-exposure groups based on the sum of the ten ***-high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry was used to identify non-targeted metabolites in the urine ***,fecal flora abundance was assessed by 16S rRNA gene sequencing using Illumina *** The concentrations of 21 metabolites were significantly higher in the high exposure group than in the low exposure group(variable importance for projection>1,P<0.05).Most of these metabolites were positively correlated with the hydroxyl metabolites of naphthalene,fluorine,and phenanthrene(r=0.336–0.531).The identified differential metabolites primarily belonged to pathways associated with inflammation or proinflammatory states,including amino acid,lipid,and nucleotide ***,these distinct metabolites were significantly associated with specific intestinal flora abundances(r=0.34–0.55),which were mainly involved in *** Higher PAH exposure in young children affected metabolic homeostasis,particularly that of certain gut microbiota-derived *** investigation is needed to explore the potential influence of PAHs on the gut microbiota and their possible association with neurodevelopmental outcomes.

关键词： Child Gut microbiota Non-targeted metabolomics Polycyclic aromatic hydrocarbons Urinary metabolite profile

Impact of letters to the editor and publications in 2023

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2024年第1期45卷 136-137页

作者： xiu-ping Zhang Xue-Long Jiang Yong-Gang Yao Editorial Office of ZR&ZRDC Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China

A letter to the editor constitutes a short communication addressing a range of topics pertinent to the readership of a journal(Dkhar,2018).This format offers several benefits,such as timeliness,accessibility,innovation,and conciseness,thereby serving as an effective means to disseminate cuttingedge scientific *** the past five years,there has been a considerable increase in the number of letters published,representing the highest growth rate(approximately 20%)observed in the last three decades(Figure 1A).In the field of academic publishing,letters to the editor are typically more concise than typical research papers.

关键词： journal editor Figure

Molecular evaluation of Conogethes punctiferalis(Guenée,1854):Species status and intraspecific divergence

在线全文

学校读者我要写书评

暂无评论

Zoological Systematics 2024年第3期49卷 267-275页

作者： Jin An Yalin Yao ping Gao Minghua xiu Chengmin Shi College of Plant Protection Hebei Agricultural UniversityBaoding 071000China State Key Laboratory of North China Crop Improvement and Regulation Baoding 071000China College of Plant Protection Shenyang Agricultural UniversityShenyang 110866China

Species are not only the fundamental units of taxonomy but also the basic units of pest *** of Conogethes are important agricultural and forestry ***,species boundaries within Conogethes often appear *** the present study,we reevaluated the species status of Conogethes by applying three species delimitation approaches based on the mitochondrial DNA sequences,with particular emphasis on the yellow peach moth ***(Guenée,1854).We first optimized species delimitation and inter-species genetic divergence threshold using a DNA barcoding *** results revealed that several nominal species of Conogethes species harbored deeply diverged mitochondrial lineages which were recognized as independent species by the species delimitation *** p-distance between the delimited putative species ranged from 0.0159 to 0.1321 with a mean of *** we refined the species status of *** using the smallest interspecific distance threshold based on a geographically comprehensive population-scale *** procedure narrowed the species concept of *** to a genetically coherent *** investigation of its intraspecific divergence in the geographic context revealed that the refined *** was still widely distributed with the same or highly similar mitochondrial haplotypes occurring across South and East Asia.

关键词： Species delimitation DNA barcoding genetic distances mitochondrial DNA