检索结果-南通市图书馆

Derivation of soil Pb/Cd/As thresholds for safety of vegetable planting: A case study for pakchoi in Guangdong Province,China

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2019年第1期18卷 179-189页

作者： LI Fu-rong WEN Dian WANG Fu-hua SUN Fang-fang WANG xu DU Ying-qiong LIU Xiang-xiang WAN Kai Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Sciences/Key Laboratory of Testing and Evaluation for Agro-product Safety and Quality Ministry of Agriculture/Laboratory of Quality & Safety Risk Assessment for Agro-product (Guangzhou)Ministry of Agriculture

Regional guidelines for soil heavy metals,in conjunction with specific crops,are proposed to better assess soil environmental *** this study,large amounts of soils with different levels of Pb/Cd/As pollution were collected in Guangdong Province,China,to carry out a pot experiment,which was closer to the actual situation and properties of the heavy metal contaminated *** the widely planted vegetable pakchoi as the research object,we analyzed the correlations between the Pb/Cd/As concentrations in pakchoi and the total or available soil Pb/Cd/As concentrations and established their optimal regression *** then,the total and available soil Pb/Cd/As thresholds for pakchoi were calculated according to the allowable Pb/Cd/As limits in pakchoi and were compared with the current soil assessment ***,a lot of paired vegetable-soil samples in field were collected and their pollution situations were assessed by both the current limit thresholds and the calculated ***,it was more consistent to assess the Cd and As pollution situation of the vegetable and soil samples with the calculated soil thresholds than the current soil assessment *** further proved that it was necessary to explore the soil heavy metal thresholds for safety of vegetable in specific regions,which would be more scientific and practical to guide safety production of local agricultural products and effective utilization of soil resources.

关键词： heavy metal pollution available content soil threshold correlation analysis vegetable

Differential metabolites and their transcriptional regulation in seven major tea cultivars (Camellia sinensis) in China

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2023年第11期22卷 3346-3363页

作者： GAO Ting HOU Bing-hao SHAO Shu-xian xu Meng-ting zheng Yu-cheng JIN Shan WANG Peng-jie YE Nai-xing College of Horticulture Fujian Agriculture and Forestry University/Key Laboratory of Tea Science in Universities of Fujian ProvinceFuzhou 350002P.R.China College of Horticulture Northwest A&F UniversityShaanxi 712100P.R.China

Various genetic and biochemical characteristics exist in tea plant cultivars,and they largely determine production suitability and tea ***,we performed transcriptomic and metabolomic analyses of young shoots of seven tea cultivars and identified major regulatory transcription factors(TFs)for the characteristic metabolites in different cultivars based on weighted gene co-expression network analysis(WGCNA).Phenotypically,we found that‘Tieguanyin’(TGY)and‘Fujian Shuixian’(FJSX),which are suitable for oolong tea,had higher catechin *** metabolites of‘Jinxuan’(JX)were more prominent,especially the contents of phenolic acids,flavonoids,terpenes,and tannins,which were higher than those of the other six ***,‘Fudingdabai’(FDDB),which is suitable for white tea,was rich in amino acids,linolenic acid,and *** the molecular level,hydroxycinnamoyl CoA quinate hydroxycinnamoyl transferase(HCT)(CsTGY12G0001876,and CsTGY06G0003042)led to the accumulation of chlorogenic acid in *** main reason for the higher l-ascorbic acid content in FJSX was the high expression levels of L-galactono-1,4-lactone hydrogenase(GalLDH)(CsTGY13G0000389)and Myo-inositol oxygenase(MIOX)(CsTGY14G0001769,and CsTGY14G0001770),which were regulated by WRKY(CsTGY11G0001197).Furthermore,FDDB,‘Longjing 43’(LJ43),‘Shuchazao’(SCZ)and‘Baihaozao’(BHZ)had higher free fatty acid contents,among which MYB(CsTGY14G0002344)may be a hub gene for the regulation of palmitoleic acid *** importantly,we found that the shoots of TGY were green with purple,mainly due to the accumulation of anthocyanins and the downregulation of the Mg-protoporphyrin IX nonomethyl ester cyclase(MPEC)(CsTGY10G0001989)gene that affects chlorophyll *** results will provide a theoretical reference for tea cultivar breeding and suitability.

关键词： Camellia sinensis transcriptomics metabolomics WGCNA

Arabidopsis Phytochrome D Is Involved in Red Light-Induced Negative Gravitropism of Hypocotyles

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2014年第8期13卷 1634-1639页

作者： LI Jian-ping HOU Pei zheng xu SONG Mei-fang SU Liang YANG Jian-ping Institute of Crop Sciences Chinese Academy of Agricultural Sciences Institute of Nuclear and Biotechnology Xinjiang Academy of Agricultural Sciences Graduate School Chinese Academy of Agricultural Sciences

The phytochrome gene family, which is in Arabidopsis thaliana, consists of phytochromes A-E（phyA to phyE）, regulates plant responses to ambient light environments. PhyA and phyB have been characterized in detail, but studies on phyC to phyE have reported discrepant functions. In this study, we show that phyD regulates the Arabidopsis gravitropic response by inhibiting negative gravitropism of hypocotyls under red light condition. PhyD had only a limited effect on the gravitropic response of roots in red light condition. PhyD also enhanced phyB-regulated gravitropic responses in hypocotyls. Moreover, the regulation of hypocotyl gravitropic responses by phyD was dependent upon the red light fluence rate.

关键词： phytochrome D gravitropism Arabidopsis thaliana

非均质复合材料力学性能的确定性多尺度计算方法

在线全文

学校读者我要写书评

暂无评论

西安交通大学学报 2015年第10期49卷 8-13,28页

作者：裴世源徐华西安交通大学现代设计与转子轴承系统教育部重点实验室西安710049 新疆大学机械工程学院乌鲁木齐830046

针对具有多尺度特性的非均质复合材料进行结构强度分析,提出了一种确定性多尺度计算方法——有限细胞法(FCM)。该方法通过矩阵凝聚和插值近似得到粗网格的刚度矩阵,在计算得到粗网格解后,通过回代技术可获得全域细网格解。为验证FCM的... 详细信息

针对具有多尺度特性的非均质复合材料进行结构强度分析,提出了一种确定性多尺度计算方法——有限细胞法(FCM)。该方法通过矩阵凝聚和插值近似得到粗网格的刚度矩阵,在计算得到粗网格解后,通过回代技术可获得全域细网格解。为验证FCM的计算精度和计算效率,构造了多个数值算例,并与理论和有限元(FEM)结果进行了对比,结果发现:相对于FEM,FCM可显著扩大计算规模,提高计算速度,且易于并行;相对于其他多尺度计算方法,FCM在构造粗网格刚度矩阵过程中无需引入微观边界条件,计算精度高,易于降尺度计算。因此,FCM是分析复合材料结构强度的一种有效的多尺度算法,同时该方法易于推广至多尺度的非线性结构分析、热分析、地下水渗流分析等领域。

关键词：有限细胞法多尺度计算非均质复合材料

Enhanced quality of Al_(2)O_(3)/SiC gate stack via microwave plasma annealing

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第10期43卷 5362-5371页

作者： Nan-Nan You Xin-Yu Liu Qian Zhang Zhen Wang Jia-Yi Wang Yang xu Xiu-Yan Li Yu-zheng Guo Sheng-Kai Wang High-Frequency High-Voltage Device and Integrated Circuits R&D Center Institute of Microelectronics of the Chinese Academy of SciencesBeijing 100029China School of Integrated Circuits University of Chinese Academy of SciencesBeijing 100049China School of Electrical Engineering and Automation Wuhan UniversityWuhan430072China Department of Micro/Nano Electronics School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The high-quality gate dielectric on silicon carbide(SiC)surface is critical to fabricate high-performance SiC metal-oxide-semiconductor field-effect transistors(MOSFETs).This research employs microwave plasma annealing(MPA)to obtain high-quality Al_(2)O_(3)/SiC gate *** designing MPA atmosphere and optimizing the plasma power,the SiC MOS capacitor with a Al_(2)O_(3)dielectric film shows the enhanced *** interface state density is reduced by 1 order of magnitude to 6×10^(11)cm^(-2)·eV^(-1),the breakdown electric field is increased,and the voltage shift is effectively suppressed Besides,the mechanism of MPA process is discussed in terms of the thermal effect and reactant species.X-ray photoelectron spectroscopy(XPS)results unveil oxygen plasma plays the main *** plasma power during the MPA process results in defect repairs of the firstneighbor Al-O bonding and partial removal of Al-O-H bond from the interface *** study demonstrates that MPA process is an effective option to realize highquality dielectric and interface on SiC.

关键词： Silicon carbide Al_(2)O_(3) Metal-oxide-semiconductor Microwave plasma annealing Defect repairs X-ray photoelectron spectroscopy

Therapeutic targets of Traditional Chinese Medicine for colorectal cancer

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2016年第2期36卷 243-249页

作者： Li Weidong Li Chunsheng zheng Honggang Chen Guohong hua Baojin Oncology Department Guang'anmen Hospital China Academy of Chinese Medical Sciences Nephrology department Taizhou Central Hospital Urinary surgery Department Guang'anmen Hospital China Academy of Chinese Medical Sciences

OBJECTIVE: To explore the role of Traditional Chinese Medicine(TCM) in the prevention and treatment of colorectal cancer and identify possible therapeutic targets of TCM to provide clues for the use of TCM for colorectal cancer prevention and treatment in the clinic and to find novel directions for new drug discovery for colorectal ***: We used Pub Med and Google to search for and collect scientific publications for a full evaluation of current evidence in the literature indicating the potential role of Chinese herbal medicines and their respective ingredients as effective ***: We extracted a detailed description of potential therapeutic Chinese herbal medicines and their constituent ingredients that target different mechanisms in colorectal cancer such as gene mutation, dysregulation of signaling pathways, metabolism disorders, and the inflammatory microenvironment, including both conventional and non-conventional ***: TCM may be a promising complementary and alternative therapy for the treatment of colorectal cancer.

关键词： Colorectal neoplasms Medicine Chi nese traditional Prevention and control Therapeu tics Drug delivery systems

Feasibility and safety of sorafenib treatment in hepatocellular carcinoma patients with spontaneous rupture

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2014年第43期20卷 16275-16281页

作者： Shun-Zhen zheng De-Jie Liu Ping Sun Guang-Sheng Yu Yan-Tian xu Wei Gong Jun Liu Department of Liver Transplantation and Hepatobiliary Surgery Shandong Provincial Hospital Affiliated to Shandong University Department of Anesthesiology Qilu HospitalShandong University Department of Biochemistry and Molecular Biology Shandong University School of Medicine

AIM: To report the outcome of patients with ruptured hepatocellular carcinoma (HCC) treated at a single center during a 5-year period.

关键词： Sorafenib Hepatocellular carcinoma Spontaneous rupture Efficacy Safety

Susceptibility to Insecticides and Ecological Fitness in Resistant Rice Varieties of Field Nilaparvata lugens Stl Population Free from Insecticides in Laboratory

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

Rice science 2014年第3期21卷 181-186页

作者： YANG Ya-jun DONG Bi-qin xu Hong-xing zheng xu-song K.L.HEONG LU Zhong-xian State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control Institute of Plant Protection and MicrobiologyZhejiang Academy of Agricultural Sciences College of Chemistry and Life Science Zhejiang Normal University CABI South East Asia PO Box 210 UPM SerdangMalaysia

A population of rice brown planthopper （BPH） Nilaparvata lugens collected from a paddy field in Hangzhou was successively reared on susceptible rice Taichung Native 1 （TN1） in a laboratory free from insecticides for more than 14 generations. The changes in susceptibility to insecticides and ecological fitness on different resistant rice varieties were monitored in each generation. The resistance ratio to imidacloprid sharply declined with the succession of rearing generations without insecticides from 359.94-fold at F1 to 6.50-fold at F14 compared with the susceptible strain, and the resistance ratio to chlorpyrifos was from 9.90-fold at F1 to 5.94-fold at F14. Nymphal duration and weights of newly hatched female adults were significantly affected by rice variety, generation and their interactions, but nymphal survival was significantly affected by the generation only. The ratio of brachypterous adults in males was affected by the generation and generation × variety interaction, whereas no difference was found in females. Nymphal duration extended with increasing generations, and the female nymphal duration was shorter in the susceptible variety TN1 than those in the resistant varieties IR26 and IR36. In addition, the female adult weight in TN1 was higher than those in IR26 and IR36. These results indicated that the resistance of field BPH population to insecticides was reversed after several generations of no-exposure to insecticides, and the ecological fitness in TN1 was higher than those in IR26 and IR36. These findings suggested the rational and reduced use of insecticides in combination with the manipulation of resistant rice varieties would be effective for BPH management.

关键词： Nilaparvata lugens insecticide-free ecological fitness insecticidal resistance rice variety

Post-traumatic heterotopic ossification in front of the ankle joint for 23 years:A case report and review of literature

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第1期11卷 193-200页

作者： zheng xu Zhou-Zhou Rao Zhong-Wen Tang Zhen-Qi Song Ming Zeng Hao-Li Gong Jie Wen Department of Pediatric Orthopedics Hunan Provincial People's HospitalThe First Affiliated Hospital of Hunan Normal UniversityChangsha 410013Hunan ProvinceChina Key Laboratory of Translational Cancer Stem Cell Research Department of PhysiologyHunan Normal University School of MedicineChangsha 410013Hunan ProvinceChina Department of Anatomy Hunan Normal University school of MedicineChangsha 410013HunanChina

BACKGROUND Heterotopic ossification(HO)refers to the formation of new bone in non-skeletal tissues such as muscles,tendons or other soft *** muscle and soft tissue injury often lead to the formation of ***,anterior HO of the ankle is rarely *** SUMMARY We report a patient with massive HO in front of the ankle joint for 23 *** 1998,the patient was injured by a falling object on the right lower extremity,which gradually formed a massive heterotopic bone change in the right calf and dorsum of the *** patient did not develop gradual ankle function limitations until nearly 36 mo ago,and underwent resection of *** after 23 years and resection of HO,the ankle joint was still able to *** It is recommended that the orthopedist should be aware of HO and distinguish it from bone tumor.

关键词： Heterotopic ossification Post-traumatic Ankle joint Case report