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| 1 | 亚麻纤维热解动力学的“model free”法和Coats-Redfern模型拟合法研究显示文摘亚麻纤维是一种潜在的气化原料,本文对亚麻纤维的热解行为进行了热重分析研究。10mg粒径为0.60~0.85mm的亚麻纤维颗粒在高纯氮气的保护下分别以10、20、30、50K.min-1的升温速率线性升温到550℃。使用"model free"方法和Coats-Redfern模型拟合方法分析亚麻纤维的热解过程,并估算出热解反应的表观活化能。本文中"model free"方法包括Friedman、Flynn-wall-Ozawa、Vyazovkin and Wight三种等转化率方法及Kissinger法。三种等转化率方法均得到活化能随着转化率的升高而升高的规律。四种"model free"方法显示亚麻纤维的活化能主要在155~175kJ·mol-1之间,使用模型拟合方法所获得亚麻纤维热解反应的活化能值在175kJ·mol-1左右,使用模型拟合方法和"model free"方法所得的活化能值接近。这些活化能值可以为亚麻纤维高效的热化学利用提供基础数据。 | 许桂英 Watkinson A.Paul Ellis Naoko 孙国刚 | 2010 | 化工学报2010,61,9: | 11 |
| 2 | 四环素对芘污染农田土壤微生物修复的影响及响应过程显示文摘针对城郊农田土壤中多环芳烃和抗生素复合污染的新特征,通过室内模拟土培实验,研究四环素(Tetracycline,TC)胁迫下,降解菌Sphingobium sp.PHE3对长三角典型农田土壤中芘的降解效果和影响机制。研究表明,接种降解菌处理(B)能明显促进土壤中芘的降解,TC的引入可显著抑制土壤中芘的深度降解过程(P<0.05)。经过90天培养后,B处理与接菌+添加TC处理(BTC)的降解率分别为40.1%、25.7%,较对照分别提高了23.0倍、14.1倍。通过土壤微生物群落结构多样性分析发现,降解菌数量在经历90天的土壤环境适应期后逐渐快速增加,其数量变化与污染物芘在土壤中含量消减趋势呈负相关;引入芘和四环素对土壤细菌群落结构多样性和功能稳定性具有显著影响(P<0.05),然而对土壤真菌群落影响不显著(P>0.05)。此外,B和BTC处理条件下,土壤过氧化氢酶活性、荧光素二乙酸酯酶活性和土壤微生物生物量碳氮值显著高于单独添加芘处理(P)和单独添加TC处理(TC),但P处理与TC处理之间无显著差异(P>0.05),说明外源污染物(芘或四环素)对于土壤酶活性和微生物生物量碳氮具有显著抑制作用(P<0.05),致使降解菌功能作用受到抑制。综上研究结果表明TC可明显抑制土壤中典型四环多环芳烃的微生物降解过程,针对多环芳烃与抗生素复合有机污染农田土壤的微生物强化修复技术有待深入研究。 | 沈方圆 孙明明 焦加国 武俊 田达 刘款 李辉信 胡锋 SCHWAB A.Paul | 2016 | 土壤2016,48,5: | 7 |
| 3 | Lead halide perovskite nanowires stabilized by block copolymers for Langmuir-Blodgett assembly显示文摘The rapid development of solar cells based on lead halide perovskites(LHPs)has prompted very active research activities in other closely-related fields.Colloidal nanostructures of such materials display superior optoelectronic properties.Especially,onedimensional(1D)LHPs nanowires show anisotropic optical properties when they are highly oriented.However,the ionic nature makes them very sensitive to external environment,limiting their large scale practical applications.Here,we introduce an amphiphilic block copolymer,polystyrene-block-poly(4-vinylpyridine)(PS-P4VP),to chemically modify the surface of colloidal CsPbBr3 nanowires.The resulting core-shell nanowires show enhanced photoluminescent emission and good colloidal stability against water.Taking advantage of the stability enhancement,we further applied a modified Langmuir-Blodgett technique to assemble monolayers of highly aligned nanowires,and studied their anisotropic optical properties. | Hao Liu Martin Siron Mengyu Gao Dylan Lu Yehonadav Bekenstein Dandan Zhang Letian Dou A.Paul Alivisatos Peidong Yang | 2020 | Nano Research2020,13,5: | 4 |
| 4 | 土壤反硝化对磺胺嘧啶及抗性基因消减的影响显示文摘农田土壤中抗生素及抗性基因的复合污染已给生态环境安全和人体健康带来了全新隐患。针对厌氧条件下,反硝化作用过程对土壤抗生素乃至抗性基因消减影响的研究一直相对较少。因而,本研究采集牛粪堆积池塘周边底层农田土壤作为目标污染土壤,重点研究反硝化作用过程对土壤磺胺嘧啶及抗性基因消减动态的影响。结果表明:相较于原始污染土壤处理(T1),添加了NO_3~–-N的处理(T2)可以显著强化土壤和水相中反硝化速率,提升N_2O的产气速率,促进土壤中磺胺嘧啶浓度和抗性基因丰度的快速降低;同时发现土壤反硝化基因(nir K、nir S和nos Z)与磺胺类抗性基因(sul Ⅰ和sul Ⅱ)呈显著负相关(P<0.05),说明当NO_3~–-N底物越充足,土壤反硝化细菌活性往往被激活,其反硝化功能基因表达就越活跃,土壤反硝化作用过程就越强烈,从而反馈作用促进磺胺嘧啶抗生素的厌氧消减,进而有助于sul系列抗性基因丰度的显著衰减;同时通过高通量测序技术及对反硝化细菌的分离筛选后,发现变形菌门(Proteobacteria)赖氨酸芽胞杆菌属(Lysinibacillus)的细菌是土壤厌氧反应前后的主导优势菌群,对于强化反硝化过程和促进磺胺嘧啶及sul抗性基因的消减发挥了潜在的积极作用。本研究结果可为探明土壤中抗生素的厌氧消减过程和缓解抗性基因的扩散传播提供新颖的认知基础。 | 刘款 孙明明 刘满强 焦加国 田达 陈旭 武俊 李辉信 胡锋 A.Paul Schwab | 2017 | 土壤2017,49,3: | 3 |
| 5 | Duodenal ulcer prevalence: research into the nature of possible protective dietary lipids显示文摘 | A.Paul Jayaraj Frank I.Tovey MichaelHobsley | 2003 | Phytother. Res2003,,4: | 1 |
| 6 | 一种应用在航天探测器上的二氧化碳两相回路热控系统冷凝器的设计优化显示文摘阿尔法磁谱仪中的轨迹探测器是探测空间反物质的核心探测器,它工作于由超流液氦冷却的超导磁体的中心,其正常运作需要体积小、散热及温控能力强的热控系统的支持,以应对国际空间站上复杂的太空热流环境及真空、微重力等因素.介绍了利用SINDA/FLUINT模拟方法,对轨迹探测器的热控系统冷凝器进行设计优化. | 黄臻成 莫冬传 吕树申 何振辉 A.Paul J.E.Van | 2008 | 空间科学学报2008,28,1: | 1 |
| 7 | Relationship between effective ionic dialysance and in vivo urea clearance during hemodialysis显示文摘 | Robert M. Lindsay Bernard Bene Nicolas Goux A.Paul Heidenheim Christina Landgren Jan Sternby | 2001 | American Journal of Kidney Diseases2001,,3: | 1 |
| 8 | Management of concomitant hepatic artery injury in patients with iatrogenic major bile duct injury after laparoscopic cholecystectomy显示文摘 | J.Li A.Frilling S.Nadalin A.Paul M.Malagò C. E.Broelsch | 2008 | Br J Surg2008,,4: | 1 |
| 9 | Calcium and phosphate balance with quotidian hemodialysis显示文摘 | Robert M Lindsay Fayez Alhejaili Gihad Nesrallah Rosemary Leitch Laurie Clement A.Paul Heidenheim Claude Kortas | 2003 | American Journal of Kidney Diseases2003,,: | 1 |
| 10 | Management of concomitant hepatic artery injury in patients with iatrogenic major bile duct injury after laparoscopic cholecystectomy显示文摘 | J.Li A.Frilling S.Nadalin A.Paul M.Malagò C. E.Broelsch | 2008 | Br J Surg2008,,4: | 1 |
| 11 | Surface‐wave propagation across the Mexican Volcanic Belt and the origin of the long‐period seismic‐wave amplification in the Valley of Mexico显示文摘 | N. M.Shapiro M.Campillo A.Paul S. K.Singh D.Jongmans F. J.Sánchez‐Sesma | 2007 | Geophysical Journal International2007,,1: | 1 |
| 12 | Soil organic carbon pool changes following land‐use conversions显示文摘 | StevenDeGryze JohanSix KeithPaustian Sherri J.Morris Eldor A.Paul RoelMerckx | 2008 | Global Change Biology2008,,7: | 1 |
| 13 | Classifying handedness in chiral nanomaterials using label error robust deep learning显示文摘High-throughput scanning electron microscopy(SEM)coupled with classification using neural networks is an ideal method to determine the morphological handedness of large populations of chiral nanoparticles.Automated labeling removes the time-consuming manual labeling of training data,but introduces label error,and subsequently classification error in the trained neural network.Here,we evaluate methods to minimize classification error when training from automated labels of SEM datasets of chiral Tellurium nanoparticles.Using the mirror relationship between images of opposite handed particles,we artificially create populations of varying label error.We analyze the impact of label error rate and training method on the classification error of neural networks on an ideal dataset and on a practical dataset.Of the three training methods considered,we find that a pretraining approach yields the most accurate results across label error rates on ideal datasets,where size and other morphological variables are held constant,but that a co-teaching approach performs the best in practical application. | C.K.Groschner Alexander J.Pattison Assaf Ben-Moshe A.Paul Alivisatos Wolfgang Theis M.C.Scott | 2022 | npj Computational Materials2022,,1: | 0 |
| 14 | 溶葡球菌酶前体及前体加工蛋白酶的生成控制和纯化显示文摘为深入探讨溶葡球菌酶前体加工转化为成熟的溶葡球菌酶的机制,本文通过条件控制分别从Staphylococcus simulans的培养液中获得了溶葡球菌酶前体和它的加工蛋白酶,并分别通过HPLC和Affi-Gel 501亲和层析对它们进行了纯化,根据聚丙烯酰胺凝胶电泳和凝胶等电聚焦电泳,表明二者已基本上达到均一的程度。在此基础上,又进行了溶葡球菌酶前体的体外加工转化实验。 | 周润琦 Recsei A.Paul | 1990 | 生物化学杂志1990,6,3: | 0 |
| 15 | Real time imaging of two-dimensional iron oxide spherulite nanostructure formation显示文摘The formation of complex hierarchical nanostructures has attracted a lot of attention from both the fundamental science and potential applications point of view.Spherulite structures with radial fibrillar branches have been found in various solids;however,their growth mechanisms remain poorly understood.Here,we report real time imaging of the formation of two-dimensional(2D)iron oxide spherulite nanostructures in a liquid cell using transmission electron microscopy(TEM).By tracking the growth trajectories,we show the characteristics of the reaction front and growth kinetics.Our observations reveal that the tip of a growing branch splits as the width exceeds certain sizes(5.5–8.5 nm).The radius of a spherulite nanostructure increases linearly with time at the early stage,transitioning to nonlinear growth at the later stage.Furthermore,a thin layer of solid is accumulated at the tip and nanoparticles from secondary nucleation also appear at the growing front which later develop into fibrillar branches.The spherulite nanostructure is polycrystalline with the co-existence of ferrihydrite and Fe3O4 through-out the growth.A growth model is further established,which provides rational explanations on the linear growth at the early stage and the nonlinearity at the later stage of growth. | Wenjing Zheng Matthew R.Hauwiller Wen-I Liang Colin Ophus Peter Ercius Emory M.Chan Ying-Hao Chu Mark Asta Xiwen Du A.Paul Alivisatos Haimei Zheng | 2019 | Nano Research2019,12,11: | 0 |
| 16 | Institutional analysis of intra-and post-operative tracheostomy management for risk reduction显示文摘Objectives:Determine variability in intra-and post-operative management of tracheostomies(trachs)at our institution as existing literature suggests that trachs are a frequent trigger for airway-related emergencies.Catalyze the development of an institution-wide protocols for trach care.Methods:A 39-question online survey was sent to 55 providers who perform open and percutaneous trachs at three of the hospitals within our large,urban,academic medical center.These providers were identified by surveillance of the operating room schedules for 1 year.Results:The survey was completed by 40 of the 53 eligible providers(75.5%).Response rate by question varied.Respondents included members of all departments that perform trachs at our institution(Otorhinolaryngology,Trauma Surgery,Thoracic Surgery,General Surgery,Cardiovascular Surgery and Interventional Pulmonology).While most responses demonstrated uniformity in practice,notable variations included the following:80%of percutaneous trach providers stated that morbid obesity was not a contraindication to performing a trach outside of the operating room(n=20)while 58%of open trach providers stated that morbid obesity was a contraindication;only 35%of open trach providers perform a Bjork flap(n=350).The survey also identified significant variability in practice with regards to timing of trach suture removal.Discussion:Lack of uniformity was identified in several practices related to intra-and post-operative tracheostomy care.Results did,however,trend toward consensus in many areas.The results are being used to establish a more consistent approach to tracheostomy management across our institution to ensure standardization of practice amidst the rapidly evolving practices of trach placement.Implications for practice:With ongoing evolution in the methods of trach placement and its management,the concepts put forth here will be a resource for health care providers at other institutions to consider intra-institutional analysis and establishment of practice standardization. | Laura E.Henry Ellen A.Paul Joshua H.Atkins Niels D.Martin Ara A.Chalian Christopher H.Rassekh | 2022 | World Journal of Otorhinolaryngology-Head and Neck Surgery2022,8,4: | 0 |
| 17 | 从Staphylococcus simulans消除含有溶葡球菌酶基因质粒的研究显示文摘溶葡球菌酶是Staphylococcus simulans分泌的能分解葡萄球菌的酶,它的基因位于一个约40kb的质粒DNA上。为了探索用高拷贝质粒取代原有的质粒的可能性,本文首先进行了从该菌株中消除含有溶葡球菌酶基因质粒的实验研究,获得了相应的“消除”菌株。根据对目的菌株和原始菌株的比较分析,包括细胞蛋白质的SDS-聚丙烯酰胺凝胶电泳,Western blot分析,质粒DNA的琼脂糖胶电泳、Southern Blot分析,质粒DNA的限制性内切核酸酶酶切分析以及对溶葡球菌酶作用敏感性的分析,都表明该目的菌株确系Staphylococcus simulans的衍生菌株,只是清除了其中含有溶葡球菌酶基因的质粒。在此基础上,本文也进行了转化实验。 | 周润琦 陈石根 Recsei A.Paul | 1993 | 生物化学杂志1993,9,1: | 0 |
| 18 | 以小胜大的纳米医学技术显示文摘 | A.Paul Alivisatos 杨海 | 2001 | 科学(中文版)2001,,12: | 0 |