检索结果-南通市图书馆

Critical analysis of feeding jejunostomy following resection of upper gastrointestinal malignancies

World Journal of Gastrointestinal Surgery 2017年第2期9卷 53-60页

作者： Andrew M Blakely Saad Ajmal Rachel E Sargent thomas t ng thomas J Miner Department of Surgery Rhode Island HospitalProvidence Warren Alpert Medical School of Brown University Providence

AIM to assess nutritional recovery,particularly regarding feeding jejunostomy tube(FJt)utilization,following upper gastrointestinal resection for malignancy. MEtHODS A retrospective review was performed of a prospectively-maintained database of adult patients who underwent esophagectomy or gastrectomy(subtotal or total)for cancer with curative intent,from January 2001 to June 2014. Patient demographics,the approach to esophagectomy,the extent of gastrectomy,FJt placement and utilization at discharge,administration of parenteral nutrition(PN),and complications were evaluated. All patients were followed for at least ninety days or until *** the 287 patients underwent upper GI resection,comprised of 182 esophagectomy(n=107 transhiatal,58.7%; n=56 Ivor-Lewis,30.7%)and 105 gastrectomy [n=63 subtotal(SG),60.0%; n=42 total(tG),40.0%]. 181 of 182 esophagectomy patients underwent FJt,compared with 47 of 105 gastrectomy patients(99.5% vs 44.8%,P t had undergone tG(n=39,92.9% vs n=8 SG,12.9%,P ngth of stay was similar between esophagectomy and gastrectomy groups(14.7 d vs 17.1 d,P=0.076). Upon discharge,87 esophagectomy patients(48.1%)were taking enteral feeds,with 53(29.3%)fully and 34(18.8%)partially dependent. Meanwhile,20 of 39 tG patients(51.3%)were either fully(n=3,7.7%)or partially(n=17,43.6%)dependent on tube feeds,compared with 5 of 8 SG patients(10.6%),all of whom were partially dependent. Gastrectomy patients were significantly less likely to be fully dependent on tube feeds at discharge compared to esophagectomy patients(6.4% vs 29.3%,P=0.0006). PN was administered despite FJt placement more often following gastrectomy than esophagectomy(n=11,23.4% vs n=7,3.9%,P=0.0001). FJt-specific complications requiring reoperation within 30 d of resection occurred more commonly in the gastrectomy group(n=6),all after tG,compared to 1 esophagectomy patient(12.8% vs 0.6%,P=0.0003). Six of 7 patients(85.7%)who experienced tube-re

关键词： Feeding jejunostomy Esophagectomy Gastrectomy Nutritional recovery Outcomes

来源：

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

tuning beneficial calcineurin phosphatase activation to counterα-synuclein toxicity in a yeast model of Parkinson’s disease

引用

Neural Regeneration Research 2025年第1期20卷 199-200页

作者： Srishti Chawla Mikael Molin thomas Nystrom Institute for Biomedicine Sahlgrenska AcademyCentre for Ageing and Health-AgeCapUniversity of GothenburgGothenburgSweden Department of Life Sciences Chalmers University of TechnologyGothenburgSweden

Calcineurin(CN)is a calcium-and calmodulindependent serine/threonine that has been studied in many model organisms including yeast,filamentous fungi,plants,and *** biological functions range from ion homeostasis and virulence in lower eukaryotes to t-cell activation in humans by human nuclear factors of activated *** is a heterodimeric protein consisting of a catalytic subunit,calcineurin A(Cna1p),which contains an active site with a dinuclear metal center,and a regulatory Ca^(2+) binding subunit called calcineurin B(Cnb1p)required to activate *** calcineurin B subunit has been highly conserved through evolution:For example,the mammalian calcineurin B shows 54%identity with calcineurin B from Saccharomyces cerevisiae.

关键词： activation dinuclear conserved

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

MULtI-FACILItY ORDERED MEDIAN PROBLEMS IN DIRECtED NEtWORKS

引用

Journal of Systems Science & Complexity 2011年第1期24卷 61-67页

作者： Huajun tAng t. C. Edwin CHEng C. t. ng Faculty of Management and Administration Macao University of Science and Technology Macao China Department of Logistics and Maritime Studies The Hong Kong Polytechnic University Hong Kong China

this paper uses a finite dominating set （FDS） to investigate the multi-facility ordered median problem （OMP） in a strongly connected directed network. the authors first prove that the multi-facility OMP has an FDS in the node set, which not only generalizes the FDS result provided by Kalcsics, et al. （2002）, but also extends the FDS result from the single-facility Case to the multiple case, filling an important gap. then, based on this FDS result, the authors develop an exact algorithm to solve the problem. However, if the number of facilities is large, it is not practical to find the optimal solution, because the multi-facility OMP in directed networks is NP-hard. Hence, we present a constant-approximation algorithm for the p-median problem in directed networks. Finally, we pose an open problem for future research.

关键词： Algorithms finite dominating sets multi-facility ordered median problem pseudoequilibria.

来源：

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

A kinetic model for a single step biodiesel production from a high free fatty acid (FFA) biodiesel feedstock over a solid heteropolyacid catalyst

引用

Green Energy & Environment 2019年第3期4卷 328-341页

作者： Aashish Gaurav Stéphane Dumas Chau t.Q.Mai Flora t.t.ng Department of Chemical Engineering University of Waterloo

Production of biodiesel from yellow grease(waste cooking oil and waste animal fats) is fast emerging as a promising alternative to address the twin challenges before the biodiesel industry today-fluctuation in prices of vegetable oil and the food versus fuel debate. Yellow grease has a high percentage of free fatty acids(FFA) and proves to be an unsuitable feedstock for biodiesel production from commercially viable alkalicatalyzed production systems due to saponification problems.'Green' methodologies based on heterogeneous solid acid catalyzed reactions have the potential to simultaneously promote esterification and transesterification reactions of yellow grease to produce biodiesel without soap formation and offer easy catalyst separation without generation of toxic streams. this paper presents kinetic studies for the conversion of model yellow grease feeds to biodiesel using a heteropolyacid supported on alumina(HSiW/Al2O3) using a batch autoclave. three model yellow grease feeds were prepared using canola oil with added FFA such as palmitic, oleic and linoleic acid. A pseudo homogeneous kinetic model for the parallel esterification and transesterification was developed. the rate constants and activation parameters for esterification and transesterification reactions for the model yellow grease feeds were determined. the rate constants for esterification are higher than the transesterification rate constants. the kinetic model was validated using the experimental biodiesel data obtained from processing a commercial yellow grease feed. the kinetic model could be used to design novel processes to convert various low-value waste oils, fats and non-food grade oils to sustainable biodiesel.

关键词： Yellow grease Canola oil Free fatty acids Heteropolyacid Kinetics for esterification and transesterification

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new green process for biodiesel production from waste oils via catalytic distillation using a solid acid catalyst-Modeling, economic and environmental analysis

引用

Green Energy & Environment 2016年第1期1卷 62-74页

作者： Aashish Gaurav Flora t.t.ng Garry L.Rempel Department of Chemical Engineering University of Waterloo

the challenges in the chemical processing industry today are environmental concerns, energy and capital costs. Catalytic distillation(CD) is a green reactor technology which combines a catalytic reaction and separation via distillation in the same distillation column. Utilization of CD in chemical process development could result in capital and energy savings, and the reduction of greenhouse gases. the efficacy of CD and the economic merits, in terms of energy and equipment savings, brought by CD for the production of biodiesel from waste oil such as yellow grease is quantified. Process flow sheets for industrial routes for an annual production of 10 million gallon AStM purity biodiesel in a conventional process(reactor followed by distillation) and CD configurations are modeled in Aspen Plus. Material and energy flows, as well as sized unit operation blocks, are used to conduct an economic assessment of each process. total capital investment, total operating and utility costs are calculated for each process. the waste oil feedstock is yellow grease containing both triglyceride and free fatty acid. Both transesterification and esterification reactions are considered in the process simulations. Results show a significant advantage of CD compared to a conventional biodiesel processes due to the reduction of distillation columns, waste streams and greenhouse gas emissions. the significant savings in capital and energy costs together with the reduction of greenhouse gases demonstrate that process intensification via CD is a feasible and new green process for the biodiesel production from waste oils.

关键词： Yellow grease Catalytic distillation Aspen plus economic analyzer Process intensification

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computational Design and Fabrication of Enantioselective Recognition Sorbents for L-phenylalanine Benzyl Ester on Multiwalled Carbon Nanotubes Using Molecular Imprinting technology

引用

Chinese Journal of Polymer Science 2019年第12期37卷 1305-1318,I0009页

作者： t Sajini Renjith thomas Beena Mathew Research&Post Graduate Department of Chemistry St.Berchmans College(Autonomous)Affiliated to Mahatma Gandhi UniversityChanganassery School of Chemical Sciences Mahatma Gandhi UniversityPriyadarsini Hills P O.Kottayan 686560India

Computational strategies have been employed to investigate the influence of the nature of monomers and cross-linker in order to design three dimensional imprinted polymers with selective recognition sites for L-phenylalanine benzyl ester(L-PABE)***,computational chemistry methods were applied to screen the molar quantity of functional monomers that interact with one mole of the template *** of the nature of functional monomer,cross-linker,and molar ratio were determined computationally using density functional calculations with B3LYP functional and generic 6-31G basis *** acid(MAA)and ethylene glycol dimethacrylate(EGDMA)were used as the functional monomer and crosslinking agent,respectively.L-PABE imprinted polymer layered on multiwalled carbon nanotube(MWCNt)and conventional bulk MIP were synthesised and characterized as *** investigate the influence of pre-organization of binding sites on the selectivity of L-PABE,respective non-imprinted polymers were also ***-MIPs and MIPs exhibited the highest adsorption capacity towards *** synthesized polymers revealed characteristic adsorption features and selectivity towards L-PABE in comparison with those of its enantiomer analogues.

关键词： Molecular imprinting L-phenylalanine benzyl ester Density functional theory Monomer Cross-linker Selectivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effectiveness of air cleaner on mitigating the transmission of respiratory disease in a dental clinic environment

引用

Building Simulation 2024年第10期17卷 1789-1803页

作者： Gang Yang Yifan Wang Ka Chung Chan Kwok Wai Mui thomas F.Flemmig Sthomas ng Christopher Y.H.Chao Sau Chung Fu Department of Building Environment and Energy Engineering The Hong Kong Polytechnic UniversityHong KongChina Faculty of Dentistry The University of Hong KongHong KongChina Department of Architecture&Civil Engineering City University of Hong KongHong KongChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina

In dental clinics with an open floor plan,the risk of patient-to-patient transmission of respiratory disease is a *** dental procedures large amounts of bioaerosol are produced and patients cannot wear personal protective *** paper examines how to effectively deploy air cleaner to reduce the infection risk in dental clinics with an open floor *** locations of air cleaners at various clean air delivery rates(CADRs)were *** dispersion of bioaerosol was studied through numerical simulations,and risk assessment was performed by a dose-response *** findings indicated that dental patients downstream of the background ventilation have a higher infection risk than those to the left and right of an infected patient(i.e.,the source).the lowest infection risks for the adjacent patients were found when the air cleaner was place opposite to the dentists,i.e.,on the floor at low CADR levels of 2.2 m^(3)/min or on the bench at CADR levels of 4.4 m^(3)/min or *** results of this study indicated that air cleaner can mitigate the risk of patient-to-patient transmission of SARS-CoV-2 in dental clinics with an open floor *** CADR levels determine the optimal placement of air cleaners.

关键词： infection risk air cleaner location dental clinic CFD simulation respiratory disease

来源：

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

Adsorption/Desorption of Low-density Lipoprotein on a Heparinized Surface of Gold Sensors

引用

Chemical Research in Chinese Universities 2012年第2期28卷 323-328页

作者： LAN Ping JI Jing HUAng Xiao-Jun GUDURU Deepak GROtH thomas VIENKEN Jorg D1ng Hui College of Materials and textiles Jiaxing UniversityJiaxing 314001P.R.China Key Laboratory of Macromolecular Synthesis and Functionalization Ministry of EducationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027P.R.China Biomedical Materials Group Department of Pharmaceutics and BiopharmaeeuticsInstitute of PharmacyMartin Luther University Halle-WittenbergHalle(Saale)06120Germany Fresenius Medical Care of Deutschland GmbH BioSciences DepartmentBad Homburg 61352Germany College of Mathematics Physics and Information Engineering Jiaxing UniversityJiaxing 314001P.R.China

Heparin has been considered to be a potentially useful ligand for low-density lipoprotein（LDL） detection and analysis in a clinical *** order to construct an affinity surface for preferential adsorption of LDL,heparin-modified gold surface（GS-Hep） was fabricated by a self-assembling method and hydrophobic-modified gold surfaces（GS-Hydro） was used as a *** morphologies of the modified gold surfaces were investigated by atomic force microscopy（AFM） and the quantity of heparin bound to gold surface was assayed by the toluidine blue（tB） colorimetric *** contact angles were determined to investigate wettability on GS-Hep and *** plasmon resonance（SPR） technique was used subsequently to detect the selective binding of LDL with *** the investigation on the effect of pH on LDL adsorption suggests that lower pH lead to higher quantities of LDL adsorption on *** with GS-Hydro,GS-Hep is selective for LDL from both single and binary protein ***,adsorbed LDL on GS-Hep could be washed off by injecting elution solution,such as NaCl solution,for the purpose of the regeneration of GS-Hep for further LDL adsorption.

关键词： Adsorption/desorption Low-density lipoprotein(LDL) Heparinized surface Surface plasmon resonance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

the benefits of being dominant:health correlates of male social rank and age in a marmot

引用

Current Zoology 2022年第1期68卷 19-26页

作者： Kenta UCHIDA Rachel ng Samuel A.VYDRO Jennifer E.SMItH Daniel t.BLUMStEIN Department of Ecology&Evolutionary Biology University of CaliforniaLos AngelesCA 90095-1606USA Department of Biology Mills CollegeOaklandCA 94613USA the Rocky Mountain Biological Laboratory Crested ButteCO 81224USA

the benefits of dominance may not come without costs,particularly for *** example,the“immunocompetence handicap hypothesis”states that males with enhanced mating success allocate resources to enhance reproductive output at a cost to their current health,whereas the“resource quality hypothesis”predicts that high-ranking males may benefit from increased reproduction and good *** the predictions from each have been well tested in captive animals and in a variety of highly social primates,fewer studies have been carried out in free-living,facultatively social *** adult male yellow-bellied marmots(Marmota flaviventer),we evaluated predictions of these hypotheses by examining the relationship between social rank and 2 health indicators—fecal glucocorticoid metabolite(FCM)levels,and neutrophil/lymphocyte(N/L)ratios—after accounting for variation explained by age,body mass,and *** found that higher-ranking males tended to have a lower N/L ratio(reflecting good health)than lower-ranking individuals,whereas FCM levels were not significantly related to *** addition,heavier male marmots had lower N/L ratios,whereas body mass was not associated with FCM *** also found that older adult males had lower FCM levels(reflecting less physiological stress)but higher N/L ratios than younger ***,we found that FCM levels decreased as the active season progressed and FCM levels were associated with the time of the ***,our results suggest that socially-dominant male marmots enjoyed better,not worse health in terms of lower N/L ratios.

关键词： immunocompetence handicap hypothesis life history trade-offs N/L ratio physiological stress resource quality hypothesis

来源：

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

Second-order optimality conditions f or minimizing a maxfunction

引用

Science China Mathematics 2000年第7期43卷 722-733页

作者：黄力人 K.F.ng Department of Mathematics South China Normal University Guangzhou 510631 China Department of Mathematics The Chinese University of Hong KongHong KongChina Correspondence should be addressed to K.F.Ng

We study Chaney's and Ben-tal-Zowe's second-order directional derivatives with applications in minimization problem for max-functions of the formh(x): = max {f(x, τ); τ ∈t},where t is a compact metricspace. We impr... 详细信息

关键词： max-f unction sup-type function second-order optimality condition nonsmooth optimization.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：