检索结果-南通市图书馆

Uranium sequestration in sediment at an iron-rich contaminated site at Oak Ridge, Tennessee *** followed by reoxidation

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第11期31卷 156-167页

作者： Peng-Song li Wei-Min Wu Debra H.phillips David B.Watson Shelly Kelly Bing li Tonia Mehlhorn Kenneth lowe Jennifer Earles Hu-Chun Tao Tong Zhang Craig S.Criddle Department of Civil and Environmental Engineering William & Cloy Codiga Resource Recovery Center Center for Sustainable Development & Global Competitiveness Stanford University Stanford CA 94305-4020 USA Key laboratory for Heavy Metal Pollution Control and Reutilization School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen 518055 China Institute of New Energy Technology Tsinghua University Beijing 100084 China School of Natural and Built Environment Queen's University Belfast Belfast BT9 5AG Northern Ireland UK Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge P.O.Box 2008 TN 37831 USA EXAFS Analysis Bolingbrook IL 60440 USA Department of Civil Engineering The University of Hong Kong Hong Kong China

This study evaluated uranium sequestration performance in iron-rich (30 g/kg) sediment via bioreduction followed by *** tests (1383 days) at Oak Ridge,Tennessee demonstrated that uranium contents in sediments increased after bioreduced sediments were re-exposed to nitrate and oxygen in contaminated *** of contaminated sediments (1200 mg/kg U) with ethanol in microcosm reduced aqueous U from 0.37 to 0.023 mg/*** of the bioreduced sediment were reoxidized with O2,H2O2,and NaNO3,respectively,over 285 days,resulting in aqueous U of 0.024,1.58 and 14.4 mg/l at pH 6.30,6.63 and 7.62,*** source-and the three reoxidized sediments showed different desorption and adsorption behaviors of U,but all fit a Freundlich *** adsorption capacities increased sharply at pH 4.5 to 5.5,plateaued at pH 5.5 to 7.0,then decreased sharply as pH increased from 7.0 to *** O2-reoxidized sediment retained a lower desorption efficiency at pH over *** NO3--reoxidized sediment exhibited higher adsorption capacity at pH 5.5 to *** pH-dependent adsorption onto Fe(Ⅲ) oxides and formation of U coated particles and precipitates resulted in U sequestration,and bioreduction followed by reoxidation can enhance the U sequestration in sediment.

关键词： Sediments Uranium Sequestration Bioreduction Reoxidation

维普期刊数据库

Genetic dissection of climacteric fruit ripening in a melon population segregating for ripening behavior

在线全文

学校读者我要写书评

暂无评论

Horticulture Research 2020年第1期7卷 459-476页

作者： lara Pereira Miguel Santo Domingo Valentino Ruggieri Jason Argyris Michael A.phillips Guangwei Zhao Qun lian Yongyang Xu Yuhua He Sanwen Huang Marta Pujol Jordi Garcia-Mas Centre for Research in Agricultural Genomics(CRAG)CSIC-IRTA-UAB-UB Edifici CRAGCampus UAB08193 CerdanyolaBarcelonaSpain IRTA(Institut de Recerca i Tecnologia Agroalimentàries) Edifici CRAGCampus UAB08193 CerdanyolaBarcelonaSpain Department of Biology University of Toronto–MississaugaMississaugaON L5L 1C6Canada Zhengzhou Fruit Research Institute Chinese Academy of Agricultural SciencesZhengzhouChina Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenChina

Melon is as an alternative model to understand fruit ripening due to the coexistence of climacteric and non-climacteric varieties within the same species,allowing the study of the processes that regulate this complex trait with genetic *** phenotyped a population of recombinant inbred lines(RIls),obtained by crossing a climacteric(Védrantais,cantalupensis type)and a non-climcteric variety(Piel de Sapo T111,inodorus type),for traits related to climacteric maturation and ethylene *** in the RIl population exhibited various combinations of phenotypes that differed in the amount of ethylene produced,the early onset of ethylene production,and other phenotypes associated with *** characterized a major QTl on chromosome 8,ETHQV8.1,which is sufficient to activate climacteric ripening,and other minor QTls that may modulate the climacteric *** ETHQV8.1 allele was validated by using two reciprocal introgression line populations generated by crossing Védrantais and Piel de Sapo and analyzing the ETHQV8.1 region in each of the genetic backgrounds.A Genome-wide association study(GWAS)using 211 accessions of the *** further identified two regions on chromosome 8 associated with the production of aromas,one of these regions overlapping with the 154.1 kb interval containing *** ETHQV8.1 region contains several candidate genes that may be related to fruit *** work sheds light into the regulation mechanisms of a complex trait such as fruit ripening.

关键词： behavior fruit reciprocal

肿瘤治疗中的化学增敏防护剂——第四届国际肿瘤治疗中化学增敏防护药物研究会议上大会总结发言

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

国际医学放射学杂志 1985年第4期 248-251页

作者： T.l.phillips ,李冬华

序言从上届会议结束两年来,增敏一防护领域发生了显著的变化。若将以前的增敏剂研究比喻成一条乡间小路的话,那么现已扩展成大街和公路纵横交错的交通网了。在这次会议上,增敏剂研究已派生出许多分枝,分设了放射增敏、放射防护、化学治... 详细信息

序言从上届会议结束两年来,增敏一防护领域发生了显著的变化。若将以前的增敏剂研究比喻成一条乡间小路的话,那么现已扩展成大街和公路纵横交错的交通网了。在这次会议上,增敏剂研究已派生出许多分枝,分设了放射增敏、放射防护、化学治疗中的增敏防护剂、放疗和化疗效应中的生化调节剂等组。将来的兴趣在于乏氧细胞的显示及其在临床诊断和治疗中的重要性。

关键词：增敏比体内实验离体实验生物化学基础医学增敏作用肿瘤治疗增敏剂防护剂会议

Efficacy,Safety and Characteristics of the Amplatzer Vascular Plug II and IV Utilization for Various Percutaneous Occlusions in Children under 10 Years

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Congenital Heart Disease 2022年第4期17卷 421-436页

作者： Hugues lucron Alban-Elouen Baruteau Caroline Ovaert Ali Houeijeh Mélanie Brard Patrice Guerin François Bourlon claire Dauphin Saskia Tuttle Maha Tagorti Rishika Banydeen François Godart Antilles-Guyane M3C Paediatric Cardiology Center University Hospital of MartiniqueFort-de-FranceFrance l’institut du Thorax INSERMCNRSUNIV NantesCHU NantesNantesFrance Department of Paediatric Cardiology and Pediatric Cardiac Surgery University Hospital of NantesNantesFrance Department of Paediatric and Congenital Heart Disease University Hospital of MarseilleMarseilleFrance Department of Paediatric and Congenital Heart Disease University Hospital of Lille-Nord de FranceLilleFrance Department of Paediatric and Congenital Heart Disease Cardiothoracic Center of MonacoMonaco Department of Paediatric and Congenital Heart Disease University Hospital of Clermont-FerrandClermont-FerrandFrance Clinical Research Department CHU Martinique(University Hospital of Martinique)Fort-de-FranceFrance

Objectives:We aim to describe the efficacy,safety,and characteristics of the Amplatzer Vascular Plug(AVP)II and IV“off-label”use for multiple cardiovascular occlusions in children under 10 ***:Observational retrospective multicenter(2007–2020,6 centers)review of paediatric procedures using AVP II or ***:A total of 125 children(49.6%aged≤1 year,147 lesions)underwent 136 successive procedures(success rate:98.5%)using 169 devices(109 AVP IV,60 AVP II).The mean device diameter was 7.7±3.2 mm(4–20 mm).The median AVP size to vessel diameter ratio was 1.3(0–2).The median age and weight at implantation were 1.0 year(0.01–9.98)and 8.4 kg(1–69).Procedures were heterogeneous(55 patent ductus arteriosus(PDA),28 collaterals,18 sequestrations,22 arteriovenous/veinovenous/coronary fistulas,6 vertical veins,6 conduits,5 ventricular septal defects,7 miscellaneous).Day 1 and 6-month occlusion rates were respectively 94.8%and 98.5%.Major adverse events(MAE)occurred in 5.2%of cases(no procedure-related deaths),and more frequently in weight≤5 kg(p=0.01),younger patients(p=0.03)during PDA closure(p=0.02)of tubular types(p=0.02)using larger devices(p=0.03)and AVP II(p=0.003).Independent predictor of MAE risk was a higher AVP diameter to patient weight ratio(Odds-ratio:2.33,95%confidence interval 1.31–4.13,p=0.004,optimal cut off:1.45).Conclusions:Both AVPs are safe and effective for percutaneous occlusions in children under *** devices represent an alternative“off label”use for well selected paediatric patients.

关键词： Amplatzer vascular plug(AVP)II and IV cardiovascular occlusions off-label use children under 10 years efficacy safety

Cost of treatment support for multidrug-resistant tuberculosis using patient-centred approaches in Ethiopia: a model-based method

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

Infectious Diseases of Poverty 2023年第4期12卷 54-62页

作者： laura Rosu lucy Morgan Ewan M.Tomeny claire Worthington Mengdi Jin Jasper Nidoi David Worthington liverpool School of Tropical Medicine Pembroke PlaceLiverpoolL35QAUK Management Science Lancaster UniversityLancasterUK Makerere University lung Institute KampalaUganda

Background Patient and health system costs for treating multidrug-resistant tuberculosis (MDR-TB) remain high even after treatment duration was shortened. Many patients do not finish treatment, contributing to increased transmission and antimicrobial resistance. A restructure of health services, that is more patient-centred has the potential to reduce costs and increase trust and patient satisfaction. The aim of the study is to investigate how costs would change in the delivery of MDR-TB care in Ethiopia under patient-centred and hybrid approaches compared to the current *** We used published data, collected from 2017 to 2020 as part of the Standard Treatment Regimen of Anti-Tuberculosis Drugs for Patients with MDR-TB (STREAM) trial, to populate a discrete event simulation (DES) model. The model was developed to represent the key characteristics of patients’ clinical pathways following each of the three treatment delivery strategies. To the pathways of 1000 patients generated by the DES model we applied relevant patient cost data derived from the STREAM trial. Costs are calculated for treating patients using a 9-month MDR-TB treatment and are presented in 2021 United States dollars (USD).Results The patient-centred and hybrid strategies are less costly than the standard-of-care, from both a health system (by USD 219 for patient-centred and USD 276 for the hybrid strategy) and patient perspective when patients do not have a guardian (by USD 389 for patient-centred and USD 152 for the hybrid strategy). Changes in indirect costs, staff costs, transport costs, inpatient stay costs or changes in directly-observed-treatment frequency or hospitalisation duration for standard-of-care did not change our *** Our findings show that patient-centred and hybrid strategies for delivering MDR-TB treatment cost less than standard-of-care and provide critical evidence that there is scope for such strategies to be implemented in routine care. These

关键词： Affordability Multidrug-resistant tuberculosis Directly-observed treatment Patient-centred approach Tuberculosis treatment delivery

维普期刊数据库

嘌呤受体P2X_7激活介导大鼠视网膜神经节细胞死亡的实验研究

在线全文

学校读者我要写书评

暂无评论

中山大学学报（医学科学版） 2006年第2期27卷 130-134页

作者：张秀兰张梅葛坚 claire H.Mitchell 中山大学中山眼科中心广东广州510060 宾夕法尼亚大学医学院生理系美国费城19104

【目的】研究嘌呤受体P2X7激动剂、拮抗剂对大鼠视网膜神经节细胞(RGCs)的影响。【方法】(1)对新生long-Evan大鼠进行上丘注射荧光标记物Aminostilbamidine以标记RGCs,检测P2X7激动剂BzATP(0、50、100、500!mol/l)和特异性拮抗剂OxATP(1... 详细信息

【目的】研究嘌呤受体P2X7激动剂、拮抗剂对大鼠视网膜神经节细胞(RGCs)的影响。【方法】(1)对新生long-Evan大鼠进行上丘注射荧光标记物Aminostilbamidine以标记RGCs,检测P2X7激动剂BzATP(0、50、100、500!mol/l)和特异性拮抗剂OxATP(100!mol/l)对体外培养RGCs存活率的影响;(2)体外培养未经Aminostilbamidine标记的新生大鼠RGCs,以10!mol/l钙离子(Ca2+)荧光染料Fura-2标记后,利用Ca2+影像测定仪分别测定P2X7激动剂BzATP(50!mol/l)和拮抗剂OxATP(100!mol/l)对RGCs胞内Ca2+浓度的影响。【结果】P2X7受体激动剂BzATP可引起体外培养的RGCs死亡,反应呈剂量依赖性,EC50=35!mol/l。在50!mol/l浓度下,BzATP约杀死30%的RGCs;而100!mol/lOxATP则可明显减轻BzATP对RGCs的毒性作用,使RGCs存活率从77%±4%提高至96%±3%(Pl/l浓度下可使胞内Ca2+升高(1022±113)nmol/l。在OxATP作用下,BzATP介导的Ca2+升高幅度显著降低,仅升高(63±13)nmol/l(P<0.001)。【结论】嘌呤能P2X7受体激活可导致大鼠视网膜神经节细胞死亡和胞内钙离子浓度升高。

关键词：视网膜神经节细胞 P2X7受体钙离子

维普期刊数据库

水催化脱卤反应:构建每次一个水分子的纳米化学反应体系(英文)

在线全文

学校读者我要写书评

暂无评论

光散射学报 2005年第3期 63-65页

作者： D.l.phillips,W.M.Kwok Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong S.A.R. China Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong S.A.R. China

A combined experimental and theoretical study of the photochemistry of CHBr3in pure water and in acetonitrile/water mixed solvents is reported that elucidates the reactions and mechanisms responsible for the photochemical conversion of the halogen atoms in CHBr3into three bromide ions in water *** is the most abundant source of organic bromine in the ocean and atmosphere and this makes it an attractive polyhalomethane to study [1]. Ultraviolet excitation with 253.7 nm light （from a Hg lamp） of low concentrations （l, and CHCl2Br in aqueous solution led to complete conversion of the halogens into halide ions （bromide and/or chloride） with similar photo-quantum yields of about 0.43 [2]. C-Br bond cleavage for the CHBr3molecule and the CHBr2radical in the gas phase have been estimated to require 63.8 and 73.6 kcal/mol of energy respectively [3]. The 253.7 nm photon has about 113 kcal/mol of energy and is thus only likely to break one carbon-halogen bond in the CHBr3, CHBr2Cl and CHCl2Br molecules following 253.7 nm excitation. How does the 253.7 nm photolysis of low concentrations of CHBr3, CHBr2Cl, and CHCl2Br in water lead to complete conversion of the halogen atoms into bromide and/or chloride ion products and where does the energy come from to break all three carbon-halogen bonds?

关键词： HBr Cl CO

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Dictyosporiaceae ***.

Fungal Diversity 2016年第5期80卷 457-482页

作者： Saranyaphat Boonmee Melvina J.D’souza Zonglong luo Umpava Pinruan Kazuaki Tanaka Hongyan Su Darbhe J.Bhat Eric H.C.McKenzie E.B.Gareth Jones Joanne E.Taylor Alan J.l.phillips Kazuyuki Hirayama Prapassorn D.Eungwanichayapant Kevin D.Hyde Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang Rai 57100Thailand School of Science Mae Fah Luang UniversityChiang Rai 57100Thailand College of Agriculture and Biology Sciences Dali UniversityDaliYunnan 671003China National Center for Genetic Engineering and Biotechnology National Science and Technology Development AgencyThailand Science Park113 Phahonyothin RoadKlong 1Klong Luang Pathumthani 12120Thailand Formerly Department of BotanyGoa UniversityNo.128/1-JAzad Housing SocietyCurca Goa VelhaIndia Manaaki Whenua landcare Research Private Bag 92170AucklandNew Zealand Faculty of Sciences Biosystems and Integrative Sciences Institute(BioISI)University of LisbonCampo Grande1749-016 LisbonPortugal Royal Botanic Garden Edinburgh 20A Inverleith RowEdinburgh EH35LRUK Department of Botany and Microbiology College of ScienceKing Saud UniversityP.O.Box:2455Riyadh 1145Saudi Arabia Faculty of Agriculture and life Science Hirosaki University3 Bunkyo-choHirosakiAomori 036-8561Japan Apple Experiment Station Aomori Prefectural Agriculture and Forestry Research Center24 FukutamiBotandairaKuroishiAomori 036-0332Japan

Dictyosporiaceae *** introduced to accommodate a holomorphic group of Dothideomycetes that are saprobes on decaying wood and plant debris in terrestrial and freshwater *** sexual morph comprises Dictyosporium meiosporum,***,Gregarithecium curvisporum,Pseudocoleophoma calamagrostidis and *** sexual morphs are characterized by immersed to erumpent,superficial,globose to subglobose,dark brown to black ascomata,bitunicate asci,and septate,hyaline,sheathed *** asexual morphs are hyphomycetous with brown,multi-septate,cheirosporous conidia,produced from holoblastic conidiogenous cells,on micronematous *** analyses of lSU,SSU and TEF1 sequence data place the genera with cheirospores in a monophyletic clade in the order *** analyses based on ITS sequence data show the family to comprise 44 distinct lineages that correspond to ten genera and an undetermined *** new genera Dictyocheirospora,Dictyopalmispora,Jalapriya and Vikalpa,and eight new species Dictyocheirospora bannica,***,***,Dictyopalmispora palmae,Dictyosporium olivaceosporum,***,Jalapriya pulchra,and Vikalpa lignicola,are introduced in the family.

关键词： Cheirosporous conidia KeylPhylogeny Sexual states Sporodochial fungi

Vangl2 regulation in a mammalian model for planar polarity

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

Vangl2 regulation in a mammalian model for planar polarity