检索结果-南通市图书馆

Genetic variation in alkaloid accumulation in leaves of Nicotiana

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) 2013年第12期14卷 1100-1109页

作者： Bo SUN Fen ZHANG Guo-jun ZHOU Guo-hai CHU fang-fang huang Qiao-mei WANG Li-feng JIN Fu-cheng LIN Jun YANG Zhengzhou Tobacco Research Institute Technology Center China Tobacco Zhejiang Industrial Co. Ltd. College of Agriculture & Biotechnology Zhejiang University

Alkaloids are plant secondary metabolites that are widely distributed in Nicotiana species and contribute greatly to the quality of tobacco leaves. Some alkaloids, such as nornicotine and myosmine, have adverse effects on human health. To reduce the content of harmful alkaloids in tobacco leaves through conventional breeding, a genetic study of the alkaloid variation among different genotypes is required. In this study, alkaloid profiles in leaves of five Nicotiana tabacum cultivars and Nicotiana tomentosiformis were investigated. Six alkaloids were identified from all six genotypes via gas chromatograph-mass spectrometry(GC-MS). Significant differences in alkaloid content were observed both among different leaf positions and among cultivars. The contents of nornicotine and myosmine were positively and significantly correlated(R2=0.881), and were also separated from those of other alkaloids by clustering. Thus, the genotype plays a major role in alkaloid accumulation, indicating a high potential for manipulation of alkaloid content through traditional breeding.

关键词： Alkaloid Genetic effects Nicotiana

Elevated nitrogen and co-evolution history with competitors shape the invasion process of Galinsoga quadriradiata

在线全文

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2024年第4期17卷 9-22页

作者： Wen-Gang Zhang Xing-Jiang Song Laís Petri Gang Liu Xiao-Yan Chen Rui-Ling Liu fang-fang huang Jia-Bin Zou Zhi-Hong Zhu College of Life Sciences Shaanxi Normal UniversityXi’an 710119China School for Environment and Sustainability University of MichiganAnn ArborMI 48109USA Research Center for UAV Remote Sensing Shaanxi Normal UniversityXi’an 710119China Changqing Teaching&Research Base of Ecology Shaanxi Normal UniversityXi’an 710119China Guangdong Provincial Key Laboratory of Silviculture Protection and UtilizationGuangdong Academy of ForestryGuangzhou 510520China

Invasive plants usually experience population differentiation as they expand from their initial invasive range to the ***,invasive plants usually encounter competitors which shared different co-evolutionary histories with *** factors may lead to varying responses of invasive plant populations to elevated nitrogen deposition during ***,this issue has received limited attention in prior *** address these challenges,we conducted a greenhouse experiment to investigate how population differentiation of Galinsoga quadriradiata interacts with the presence of various competitors in response to increased nitrogen *** types(new or old that shared short or long co-evolutionary history with the invader,respectively)were set to compete with the invasive central and edge populations under different nitrogen addition *** from the central population of ***,originating from the initial invasion range,showed greater total mass,reproduction and interspecific competitiveness compared with the edge *** addition improved growth and reproductive performance in both populations,and the central population had a stronger response compared with the edge *** performance of *** was inhibited more effectively by old competitors than new *** results indicate that population differentiation occurs in terms of growth and competitiveness during the range expansion of ***,with the central population exhibiting superior ***-evolutionary history with competitors is considered unfavorable for invasive plants in this *** results highlight the combined effects of population differentiation in invasive species and their co-evolution history with competitors in the context of global change factors.

关键词： Galinsoga quadriradiata central population edge population interspecific competition population differentiation elevated nitrogen

入侵植物粗毛牛膝菊根际土壤和根系真菌群落会沿海拔扩散路径发生变化

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

Journal of Plant Ecology 2023年第1期16卷 105-122页

作者： Rui-Ling Liu Wen-Gang Zhang Benjamin R.Lee Gang Liu Xing-Jiang Song Xiao-Yan Chen Jia-Bin Zou fang-fang huang Zhi-Hong Zhu College of Life Sciences Shaanxi Normal UniversityXi’an 710119China Carnegie Museum of Natural History PittsburghPA 15213USA Department of Biological Sciences University of PittsburghPittsburghPA 15213USA Holden Forest and Gardens KirtlandOH 44094USA National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest China Shaanxi Normal UniversityXi’an 710119China Guangdong Provincial Key Laboratory of Silviculture Protection and UtilizationGuangdong Academy of ForestryGuangzhou 510520China

与入侵植物相关的真菌群落可能会随着海拔发生变化,这可能会影响入侵植物的表现和入侵力。我们最近的研究表明,入侵植物粗毛牛膝菊(Galinsoga quadriradiata)的根系AMF侵染率随着海拔的升高而下降。然而,尚不清楚这是否与真菌群落沿海... 详细信息

与入侵植物相关的真菌群落可能会随着海拔发生变化,这可能会影响入侵植物的表现和入侵力。我们最近的研究表明,入侵植物粗毛牛膝菊(Galinsoga quadriradiata)的根系AMF侵染率随着海拔的升高而下降。然而,尚不清楚这是否与真菌群落沿海拔的变化相关。为此,我们采用高通量测序技术、功能分组和线性分析等方法,研究了秦巴山区的粗毛牛膝菊根际土壤和根系真菌群落组成与结构沿海拔的变化趋势。研究结果表明,粗毛牛膝菊根际土壤和根系真菌群落物种多样性和种类组成随海拔升高发生了显著变化。在根际土壤中真菌群落香农-威纳多样性指数随着海拔升高呈上升趋势,而在根系中则呈下降趋势。同时,在根际土壤中共生真菌的相对丰度随海拔高度没有发生显著变化,而在根系中呈下降趋势;在根际土壤中病原真菌的相对丰度随着海拔呈下降趋势,而在根系中呈上升趋势。这些研究结果暗示,该种在向研究区域高海拔地区入侵时,土壤共生真菌的供给并不会缺乏,但其与这些真菌之间建立并维持共生关系的能力降低了;在向高海拔扩张过程中,该种倾向于在根系中积累更多的病原真菌,而减少对共生真菌的依赖。这些研究结果说明,入侵植物与真菌群落之间的相互作用会沿着海拔梯度发生显著变化,植物地下部分与真菌的相互作用可能是我们理解外来种如何在高海拔环境中入侵成功的关键。

关键词：入侵植物范围扩张真菌多样性真菌丰度共生菌病原菌

High Fe‑Loading Single‑Atom Catalyst Boosts ROS Production by Density Effect for Efficient Antibacterial Therapy

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

Nano-Micro Letters 2025年第2期17卷 187-203页

作者： Si Chen fang huang Lijie Mao Zhimin Zhang Han Lin Qixin Yan Xiangyu Lu Jianlin Shi Department of Cardiology Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghai 200092People’s Republic of China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050People’s Republic of China Shanghai Frontiers Science Center of Nanocatalytic Medicine School of MedicineTongji UniversityShanghai 200092People’s Republic of China

The current single-atom catalysts(SACs)for medicine still suffer from the limited active site ***,we develop a synthetic method capable of increasing both the metal loading and mass-specific activity of SACs by exchanging zinc with *** constructed iron SACs(h^(3)-FNC)with a high metal loading of 6.27 wt%and an optimized adjacent Fe distance of~4 A exhibit excellent oxidase-like catalytic performance without significant activity decay after being stored for six months and promising antibacterial ***,a“density effect”has been found at a high-enough metal doping amount,at which individual active sites become close enough to interact with each other and alter the electronic structure,resulting in significantly boosted intrinsic activity of single-atomic iron sites in h^(3)-FNCs by 2.3 times compared to low-and medium-loading ***,the overall catalytic activity of h^(3)-FNC is highly improved,with mass activity and metal mass-specific activity that are,respectively,66 and 315 times higher than those of commercial Pt/*** addition,h^(3)-FNCs demonstrate efficiently enhanced capability in catalyzing oxygen reduction into superoxide anion(O_(2)·^(−))and glutathione(GSH)*** in vitro and in vivo assays demonstrate the superior antibacterial efficacy of h^(3)-FNCs in promoting wound *** work presents an intriguing activity-enhancement effect in catalysts and exhibits impressive therapeutic efficacy in combating bacterial infections.

关键词： Nanocatalytic medicine Single-atom catalysts Reactive oxygen species(ROS) High metal loading Oxidase catalysis

A General Forecast on Oil Harvesting and Its Policies

在线全文

学校读者我要写书评

暂无评论

A General Forecast on Oil Harvesting and Its Policies

戒酒互助小组对酒精性肝病患者饮酒行为自我管理的影响

The Fourth International Conference on Information and Management Sciences

作者： fang huang, fang Liu, Yuting Zhao School of Mathematical Sciences, Peking University, Beijing, China College of Life Scienc, Peking University, Beijing, China

Oil, a finite resource, fuels our world. The production of oil is closely related to the development of world. To quantify the world production of crude oil and establish relevant policies, we construct the following models. In model(I) we present a rough method to describe the trend of oil production. Using the history data, we can make a regression to indicate the future production and estimate the exhaustion time. In model(II) we select the oil price, percentage of remained oil and productivity as the main factors that affect the oil production. We conclude that the production curve is bell shaped. We prospected that P(t) = CP(0)e-a(t-t0)2. With estimated parameters, our model fits the history data perfectly. The exhaustion time is modified. In model(III) we try to control the oil price to stabilize the oil production within a certain range. With an input of the aimed range, our model can give out the corresponding pricing policy of a certain confidence level. Numerical results show the superiority of our model. It offers the government and organizations an attractive and inspiring way to control the oil production. In model (IV) we put forward an alternative resource policy which optimizes the total cost in investigating new alternative resources. This may help to pass through imminent oil crisis.

关键词： Oil Production non-linear regression Hub-bert Curve YPE model Lagrange multiplier method

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

世界华人消化杂志 2017年第10期25卷 904-908页

作者：沈靖黄芳芳王珠美浙江中医药大学浙江省杭州市310053 杭州市余杭区第二人民医院浙江省杭州市311121

目的观察戒酒互助小组对酒精性肝病患者饮酒行为自我管理的影响.方法 79例酒精性肝病患者随即分成2组:治疗组39例,对照组40例.两组患者均给予酒精性肝病常规治疗及健康教育,治疗组在此基础上给予戒酒互助小组辅导干预,1次/wk,持续12 wk... 详细信息

目的观察戒酒互助小组对酒精性肝病患者饮酒行为自我管理的影响.方法 79例酒精性肝病患者随即分成2组:治疗组39例,对照组40例.两组患者均给予酒精性肝病常规治疗及健康教育,治疗组在此基础上给予戒酒互助小组辅导干预,1次/wk,持续12 wk.比较干预前后酒精依赖调查量表(Michigan Alcoholism Screening Test,MAST)、动机调查问卷(Motivation Assessment Questionnaire,MAQ)、法尼亚酒精渴求量表(Pennsylvania Alcohol Craving Scale,PACS)及3 mo后的复饮率.结果最终共有75例患者完成了本研究(治疗组37例,对照组38例).干预前,两患者组各量表评分差异均无统计学意义(P>0.05).干预后,治疗组MAST评分、MAQ评分、PACS评分及复饮率均较对照组明显下降(P<0.01,P<0.05).结论戒酒互助小组干预可明显改善酒精性肝病患者对酒精的依赖和渴求程度,降低复饮率,值得临床推广应用.

关键词：戒酒互助小组酒精性肝病饮酒

Highly mass activity electrocatalysts with ultralow Pt loading on carbon black for hydrogen evolution reaction

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

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 182-190页

作者： Shaorou Ke Yajing Zhao Xin Min Yanghong Li Ruiyu Mi Yangai Liu Xiaowen Wu Minghao fang Zhaohui huang Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastersNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China

Pt-based nanocatalysts offer excellent prospects for various ***,the low loading of Pt with excellent performance for efficient and stable nanocatalysts still presents a considerable *** this study,nanocatalysts with ultralow Pt content,excellent performance,and carbon black as support were prepared through in-situ ***~2-nm particles uniformly and stably dispersed on carbon black because of the strong s-p-d orbital hybridizations between carbon black and Pt,which suppressed the agglomeration of Pt *** unique structure is beneficial for the hydrogen evolution *** catalysts exhibited remarkable catalytic activity for hydrogen evolution reaction,exhibiting a potential of 100 mV at 100 mA·cm^(-2),which is comparable to those of commercial Pt/C *** activity(1.61 A/mg)was four times that of a commercial Pt/C catalyst(0.37 A/mg).The ultralow Pt loading(6.84wt%)paves the way for the development of next-generation electrocatalysts.

关键词： hydrogen evolution reaction ultralow platinum in-situ synthesis ultrasound

Protein arginine methyltransferase-6 regulates heterogeneous nuclear ribonucleoprotein-F expression and is a potential target for the treatment of neuropathic pain

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2682-2696页

作者： Xiaoyu Zhang Yuqi Liu fangxia Xu Chengcheng Zhou Kaimei Lu Bin fang Lijuan Wang Lina huang Zifeng Xu Department of Anesthesiology International Peace Maternity and Child Health HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Anesthesiology Shanghai General HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Shanghai Key Laboratory of Embryo Original Diseases ShanghaiChina

Protein arginine methyltransferase-6 participates in a range of biological functions,particularly RNA processing,transcription,chromatin remodeling,and endosomal ***,it remains unclear whether protein arginine methyl transferase-6 modifies neuropathic pain and,if so,what the mechanisms of this *** this study,protein arginine methyltransferase-6 expression levels and its effect on neuropathic pain were investigated in the spared nerve injury model,chronic constriction injury model and bone cancer pain model,using immunohistochemistry,western blotting,immunoprecipitation,and label-free proteomic *** results showed that protein arginine methyltransferase-6 mostly co-localized withβ-tubulinⅢin the dorsal root ganglion,and that its expression decreased following spared nerve injury,chronic constriction injury and bone cancer *** addition,PRMT6 knockout(Prmt6~(-/-))mice exhibited pain ***,the development of spared nerve injury-induced hypersensitivity to mechanical pain was attenuated by blocking the decrease in protein arginine methyltransferase-6 ***,when protein arginine methyltransferase-6 expression was downregulated in the dorsal root ganglion in mice without spared nerve injury,increased levels of phosphorylated extracellular signal-regulated kinases were observed in the ipsilateral dorsal horn,and the response to mechanical stimuli was ***,protein arginine methyltransferase-6 appeared to contribute to spared nerve injury-induced neuropathic pain by regulating the expression of heterogeneous nuclear ***,protein arginine methyltransfe rase-6-mediated modulation of hete rogeneous nuclear ribonucleoprotein-F expression required amino atids 319 to 388,but not classical H3R2 *** findings indicated that protein arginine methyltransferase-6 is a potential therapeutic target fo r the treatment of peripheral neuro pathic pain.

关键词： dorsal root ganglion heterogeneous nuclear ribonucleoprotein F neuropathic pain protein arginine methyltransferase-6 sensory neurons

Allicin,a major garlic constituent,ameliorates mesenteric lymph node dendritic cell-associated immunosuppression after trauma/hemorrhagic shock in rats

在线全文

学校读者我要写书评

暂无评论

Allicin,a major garlic constituent,ameliorates mesenteric ly...