检索结果-南通市图书馆

Halogen-specific total organic halogen analysis： Assessment by recovery of total bromine

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 Environmental Sciences 2017年第8期29卷 340-348页

作者： Markus Langsa Sebastien Allard ina Kristiana anna Heitz Cynthia A.Joll Curtin Water Quality Research Centre Department of Chemistry Curtin University Perth Western Australia 6102 Australia Department of Civil Engineering Curtin University Perth Western Australia 6102 Australia Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan AlamUniversitas PapuaManokwaripapua Barat 98314Indonesia

Determination of halogen-specific total organic halogen（TOX） is vital for studies of disinfection of waters containing bromide, since total organic bromine（TOBr） is likely to be more problematic than total organic chlorine. Here, we present further halogen-specific TOX method optimisation and validation, focusing on measurement of TOBr. The optimised halogen-specific TOX method was validated based on the recovery of model compounds covering different classes of disinfection by-products（haloacetic acids, haloacetonitriles,halophenols and halogenated benzenes） and the recovery of total bromine（mass balance of TOBr and bromide concentrations） during disinfection of waters containing dissolved organic matter and bromide. The validation of a halogen-specific TOX method based on the mass balance of total bromine has not previously been reported. Very good recoveries of organic halogen from all model compounds were obtained, indicating high or complete conversion of all organic halogen in the model compound solution through to halide in the absorber solution for ion chromatography analysis. The method was also successfully applied to monitor conversion of bromide to TOBr in a groundwater treatment plant. An excellent recovery（101%）of total bromine was observed from the raw water to the post-chlorination stage. Excellent recoveries of total bromine（92%–95%） were also obtained from chlorination of a synthetic water containing dissolved organic matter and bromide, demonstrating the validity of the halogen-specific TOX method for TOBr measurement. The halogen-specific TOX method is an important tool to monitor and better understand the formation of halogenated organic compounds, in particular brominated organic compounds, in drinking water systems.

关键词： Total organic bromine Dissolved organic matter Bromide Chlorination Drinking water Health effects

Research of Mechanical and Thermal Properties of Composite Material Based on Gypsum and Straw

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

Journal of Renewable Materials 2022年第7期10卷 1859-1873页

作者： Nikola Vavřínová Kateřina Stejskalová JiříTeslík Kateřina Kubenková JiříMajer Faculty of Civil Engineering VSB-Technical University of OstravaOstrava70800Czech Republic

This article is focused on the investigation of the mechanical and thermal properties of composite material that could be used for the production of plaster or *** composite material is made of gypsum and reinforcing natural *** article verifies whether this natural reinforcement can improve the investigated properties compared to conventional plasters and gypsum plasterboards made of pure *** this composite material,high-strength plasterboards could then be produced,which meet the higher demands of users than conventional gypsum *** their production,natural waste materials would be used *** part of the development of new building materials,it is necessary to specify essential characteristics for their later use in civil *** wheat straw and three gypsum classes with strengths G2(2 MPa)—gypsum Class I.,G5(5 MPa)—gypsum Class *** G16(16 MPa)—gypsum Class *** used to create the test *** were made with different ratios of the two ingredients,with the percentages of straw being 0%,2.5%,and 5%for each gypsum *** first part of the article describes how the increasing proportion of straw affects the composite’s mechanical properties(flexural strength and compressive strength).The second part of the article focuses on the change of thermal properties(thermal conductivity and specific heat capacity).The last part of the article mentions the verification of the fire properties(single-flame source fire test and gross heat of combustion)of this composite *** research has shown that the increasing proportion of straw reinforcement caused a deterioration in the flexural strength(up to 56.49%in the *** of gypsum Class II.)and compressive strength(up to 80.27%in the *** of gypsum Class III.)and an improvement in the specific heat capacity and thermal conductivity(up to 31.40%in the ***).This composite material is thus not suitable for the production of high-streng

关键词： Composite material gypsum plasterboard crushed straw flexural strength compressive strength thermal conductivity specific heat capacity ignitability gross heat of combustion

Non-invasive home lung impedance monitoring in early post-acute heart failure discharge: Three case reports

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2019年第8期7卷 951-960页

作者： Edita Lycholip Egl? Palevi?iūt? ina Thon Aamodt Ragnhild Helles? Irene Lie anna Str?mberg Tiny Jaarsma Jelena ?elutkien? Clinic of Cardiac and Vascular Diseases Institute of Clinical Medicine Faculty of Medicine Vilnius University Center of Cardiology and Angiology Vilnius University Hospital Santaros Klinikos Faculty of Medicine Institute of Health and Society Department of Nursing Science University of Oslo Center for Patient-Centered Heart and Lung Research Department of Cardiothoracic Surgery Oslo University Hospital Departamento of Nursing Science Institute of Health and Society University of Oslo Department of Medical and Health Sciences Linkoping University Department of Social and Welfare Studies Linkoping University

BACKGROUND Patients discharged after hospitalization for acute heart failure(AHF) are frequently readmitted due to an incomplete decongestion, which is difficult to assess clinically. Recently, it has been shown that the use of a highly sensitive,non-invasive device measuring lung impedance(LI) reduces hospitalizations for heart failure(HF); it has also been shown that this device reduces the cardiovascular and all-cause mortality of stable HF patients when used in longterm out-patient follow-ups. The aim of these case series is to demonstrate the potential additive role of non-invasive home LI monitoring in the early postdischarge *** SUMMARY We present a case series of three patients who had performed daily LI measurements at home using the edema guard monitor(EGM) during 30 d after an episode of AHF. All patients had a history of chronic ischemic HF with a reduced ejection fraction and were hospitalized for 6–17 d. LI measurements were successfully made at home by patients with the help of their caregivers. The patients were carefully followed up by HF specialists who reacted to the values of LI measurements, blood pressure, heart rate and clinical symptoms. LI reduction was a more frequent trigger to medication adjustments compared to changes in symptoms or vital signs. Besides, LI dynamics closely tracked the use and dose of *** Our case series suggests non-invasive home LI monitoring with EGM to be a reliable and potentially useful tool for the early detection of congestion or dehydration and thus for the further successful stabilization of a HF patient after a worsening episode.

关键词： Heart failure Home monitoring Lung impedance Case report Pulmonary congestion

Survival outcome of lobar or segmental transcatheter arterial embolization with ethanol-lipiodol mixture in treating hepatocellular carcinoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2005年第18期11卷 2792-2795页

作者： Yun-Chung Cheung Sheung-fat Ko Shu-Hang Ng Siu-Cheung Chan Department of Diagnostic Radiology Chang Gung Memorial Hospital at Keelung and at Kaohsiang 5 Fu Hsing Street Kwei Shan Tao Yuan Hsien Taiwan China

AIM: To evaluate the dinical outcome and cost-effectiveness of transcatheter arterial ethanol-lipiodoi embolotherapy on hepatocellular carcinoma (HCC). METHODS: One hundred patients with HCC who were treated only by lobar or segmental transarterial embolization (TAE) with ethanol-lipiodoi mixture were enrolled in this study. The 1st- and 2nd-year survival rates were analyzed to evaluate the feasibility of its method. These outcomes of our patients were individually correlated to the Child-Pugh classification and the computed tomographic features of HCC. RESULTS: The overall 1st- and 2nd-year survival rates were 72% and 46%, respectively. The patients were classified into three groups according to their liver function status: 68 patients as Child-Pugh class A, 26 as Child B, and 6 as Child C. Child A had better survival rate than the Child B and/or C. The 1st-year survival rates of patients with Child A-C were 84%, 50%, and 33.3% respectively and the 2nd-year survival rates were 55.5%, 28.5%, and 33.3%, respectively. According to the computed tomographic features, solitary HCC with maximum diameter less than 5 cm had the best outcome with the lst-year survival rate of 100% and the 2nd-year survival rate of 71.4%, while solitary HCC with maximum diameter over 5 cm and multiple HCC had the lst-year survival rates of 75% and 63.7%, respectively, and the 2nd-year survival rates of 33.3% and 44.4%, respectively. Only one patient was complicated with abscess formation and was cured with antibiotic therapy. No mortality resulted from the procedures performed. CONCLUSION: TAE with ethanol-lipiodoi mixture is an economic, safe and feasible method for treating HCC, especially for the patients with smaller solitary HCC or with liver function status of Child-Pugh class A.

关键词： Liver Hepatoma Transcatheter arterial embolization Treatment Survival outcome

Calcified reticulate rind sign:A characteristic feature of gossypiboma on computed tomography

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2005年第31期11卷 4927-4929页

作者： Yi-Ying Lu Yun-Chung Cheung Sheung-fat Ko Shu-Hang Ng Department of Diagnostic Radiology Chang Gung Memorial Hospital Taiwan China College of Medicine and School of Medical Technology Chang Gung University Taiwan China

We herein report a gossypiboma resulting from a retained surgical swab, which had been left in peritoneum for 20years after appendectomy. CT revealed a cystic mass with a calcified reticulate rind. Subsequent surgery and pathological examination showed a gossypiboma. A simple experiment, using a barium-soaked surgical swab demonstrating similar CT appearance, supported our postulation that calcium deposition on the reticulated fibers of a surgical swab could generate such a characteristic 'calcified reticulate rind' sign. We believe that identification of this CT sign facilitates the diagnosis of gossypibomas.

关键词： Gossypiboma Textiloma Retained surgical swab CT

Effect of trabeculated myocardial mass on left ventricle global and regional functions in noncompaction cardiomyopathy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Cardiology 2021年第7期13卷 211-222页

作者： Gulsah Yildirim Memduh Dursun Rıfat Arslan Department of Radiology University of Health SciencesIstanbul Fatih Sultan Mehmet Training and Research Hospitalİstanbul 34752Turkey Department of Radiology İstanbul University School of Medicineİstanbul 34752Turkey Department of Radiology Istanbul UniversityIstanbul Faculty of Medicineİstanbul 34752Turkey

BACKGROUND Left ventricular(LV)noncompaction cardiomyopathy is a rare cardiomyopathic subtype that has been recognized in recent years and is being diagnosed at an increased *** is no consensus regarding the diagnosis of the disease,and increased trabeculation rates that meet the existing diagnostic criteria may even be present in healthy asymptomatic *** indicates that differentiating criteria for diagnosis are *** To examine the increase in myocardial trabeculation and the change in left ventricular global and regional *** This retrospective study included 65 patients(28 females,37 males)diagnosed with LV noncompaction cardiomyopathy who underwent cardiac magnetic resonance imaging between January 2011 and August 2016 and had a noncompacted/compacted myocardial thickness ratio of over 2.3 in more than one segment in the left *** distribution and ratios of trabeculations in apical,midventricular,and basal regions were examined in short-axis images obtained from cardiac magnetic *** addition,by using short-axis cine images,regional ejection fraction(EF)and global EF were calculated using the Simpson method in the left ventricle at apical,basal,and midventricular *** While the number of trabeculated segments were similar at the apical(3.2±1.0)and midventricular levels,a statistically significant level of involvement was not observed at the basal level(0.4±0.9)(P>0.05).The highest noncompacted/compacted(trabeculation)ratio was observed at the apical level(3.9±1.4),while this ratio was higher at the anterior(59%-89.4%)and lateral(62%-84.8%)segments(P>0.05).Global EF was positively correlated with apical,midventricular,and basal regional EF(P<0.05).However,there was no significant correlation between regional EF and the number of trabeculated segments or trabeculation ratio in all three regions;nor was there a significant correlation between regional EF and the number of trabeculated segments or trabecula

关键词： Isolated noncompaction of the ventricular myocardium Cardiomyopathies Magnetic resonance imaging Stroke volume Magnetic resonance imaging Ventricular function

SPECIAL COMMUNICATION Atrial sensing and pacing with a single pass ventricular lead

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 1998年第12期 62-67页

作者： Hung fat Tse and Chu Pak Lau

Abstract The use of single lead for atrial synchronous ventricular (VDD) pacing in patients with high grade atrioventricular (AV) block and normal sinus node function is an acceptable alternative to dual chamber (DDD) pacing. Implantation and follow up procedures are simplified, and cost is usually reduced by more than the cost of an additional atrial lead. With the use of either diagonally arranged dipole or closely spaced ring electrodes, reliable atrial sensing can be achieved using differential atrial amplifier and high atrial sensitivity. Also oversensing is infrequently observed using provocation tests and dynamic recordings, clinical undersensing is unusual and minimized by programming to the highest atrial sensitivity. However, as atrial pacing is not possible, loss of AV synchrony and rate response may occur for unrecognized or progressive sinus node disease and lower rate limit. The development of single lead dual chamber pacing system may overcome this limitation. Recent studies have demonstrated that atrial pacing can be effective either with the use of a special pacing lead configuration or via floating atrial electrode with a novel stimulation method. Overlapping biphasic impulse (OLBI) can reduce atrial pacing threshold. Early clinical experience suggested that this new pacing method can provide effective and reliable atrial pacing with a relatively low incidence of diaphragmatic pacing. Thus the problem of atrial sensing is solved with a single pass lead but further long term evaluation is required to assess the efficacy and feasibility of new instrumentation for single lead dual chamber pacing.

关键词： pacing single pass sensing Atrial and

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

数字游民:追求工作和休闲的全面自由

工会理论研究 2024年第2期 71-79页

作者：伊娜·赖兴伯格姚建华徐偲骕(编译) 新西兰惠灵顿维多利亚大学旅游管理学系复旦大学新闻学院复旦大学马克思主义新闻观教学与研究基地上海大学新闻传播学院上海大学中国当代文化研究中心

数字游民群体主要由年轻的专业人士组成,他们从事线上工作并将旅行融入日常生活。这种生活方式打破了传统的居住和工作地点的限制,工作、休闲和旅行之间的界限也随之变得模糊。本文旨在界定“数字游民”这一概念,探讨该群体选择数字游... 详细信息

数字游民群体主要由年轻的专业人士组成,他们从事线上工作并将旅行融入日常生活。这种生活方式打破了传统的居住和工作地点的限制,工作、休闲和旅行之间的界限也随之变得模糊。本文旨在界定“数字游民”这一概念,探讨该群体选择数字游牧的动机,以及如何将这些动机付诸实践。数字游民追求一种以全面自由为特征的整体性生活方式,力图实现职业自由、空间自由和个人自由。在理想状态下,他们将工作看作是一种源自内部动机的活动,它并不比休闲低等,更不仅仅是一种个人不得不履行的责任。同时,尽管休闲(包括旅行)是这种生活方式给人以积极体验的重要来源,它也带来了不少挑战,因此本质上还是一种不同形态的工作。

关键词：数字游民整体性生活方式工作休闲自由

Synergistic realization of high efficiency solar desalination and carbon dioxide reduction

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

Nano Research 2023年第7期16卷 10530-10536页

作者： Xiaoying Song Pei Wang Yi Huang Xiaoqiang Zhu U-fat Chio Fang Wang Guanyu Wang Wei Wang Bin Liu School of Optoelectronic Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China Chongqing Institute of Green and Intelligent Technology Chinese Academy of ScienceChongqing 400714China School of Electronic Science and Engineering Nanjing UniversityNanjing 210093China

Methods of seawater desalination and carbon dioxide(CO_(2))reduction using clean and renewable energy have attracted much attention withing the reducing fresh water and growing CO_(2)***,we propose a synergistic method for solardriven desalination and CO_(2)reduction at the surface of sea using a three-dimensional titanium oxide-gold semiconductor/metal(TiO_(2)-Au NW/NPs(NW:nanowire,NP:nanoparticle))photothermal conversion membrane that can efficiently harvest a broad solar spectrum(200 to 2500 nm,94%)to undertake the conversion of light-to-heat and *** TiO_(2)-Au NW/NPs membrane demonstrated a high solar vapor conversion efficiency of~90%,CO_(2)reduction yields of 0.066μmol·cm^(-2)CH_(4)and 0.015μmol·cm^(-2)CO within 5 *** addition,the membrane efficiently evaporated seawater with different salt concentrations to produce drinking water which meet World Health Organization(WHO)and US Environmental Protection Agency(EPA)*** work provides an integrated solution for solar desalination and CO_(2)reduction at the surface of sea to reduce the harm to marine life caused by ocean acidification while producing pure water.

关键词： solar desalination CO_(2)reduction titanium oxide nanowires gold nanoparticles