|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Validation of nutritional risk index method against patientgenerated subjective global assessment in screening malnutrition in colorectal cancer patients显示文摘Objective:To validate malnutrition screening tool of nutrition risk index(NRI)against patient-generated subjective global assessment(PG-SGA)as a gold standard tool in colorectal cancer patients before radiotherapy.Methods:Nutritional status of 52 volunteer colorectal cancer patients with a mean age of 54.1±16.8 years who referred to radiotherapy center were assessed by PG-SGA(gold standard method)and NRI.Serum albumin levels of patients were determined by colorimetric method.A contingency table was used to determine the sensitivity,specificity,and predictive value of the NRI in screening patients at risk of malnutrition,in comparison with the PG-SGA in patients before radiotherapy.Results:The findings of PG-SGA and NRI showed that 52%and 45%of patients in our study were moderately or severely malnourished respectively.The NRI had a sensitivity of 66%and a specificity of 60%against PG-SGA.The positive predictive value was 64%and the negative predicative value was 62%.The agreement between NRI and PG-SGA was statistically insignificant(kappa=0.267;P>0.05).Conclusions:The findings of present study showed that the prevalence of malnutrition was high in patients with colorectal cancer.Moreover,NRI method had low sensitivity and specificity in assessing nutritional status of patients with cancer.It seems that the combination of anthropometric,laboratory parameters and a subjective scoring system may be helpful tools in screening of malnutrition in cancer patients. | Elnaz Faramarzi Reza Mahdavi Mohammad Mohammad-Zadeh Behnam Nasirimotlagh | 2013 | Chinese Journal of Cancer Research2013，25，5： | 23 |
| 2 | Investigating the first-order flotation kinetics models for Sarcheshmeh copper sulfide ore显示文摘This study was performed in two phases of work.In the first stage,four conventional first-order flotation kinetics models were fitted to the measured recoveries data and the best model were selected.In the second stage,influence of pH,solid concentration,water chemistry and the amount of collector dosage were investigated on kinetics parameters including flotation rate constant and ultimate recovery.The results indicated that that perfectly mixed reactor model and Kelsall model gave the best and the weakest fit to the experimental data,respectively.It was observed that flotation rate constant and ultimate recovery were strongly affected by chemical factors investigated especially water quality.The flotation rate constant decreased with increasing the solids content,while ultimate recovery increased to certain value and thereafter reduced.It was also found that the most values of flotation rate constant and ultimate recovery obtained in dosage of collector are 30 and 40 g/t,respectively. | Asghar Azizi Ahmad Hassanzadeh Behnam Fadaei | 2015 | International Journal of Mining Science and Technology2015，25，5： | 12 |
| 3 | Nat Chem Biol:利用CRISPR-Cas9激活细菌中沉默的基因簇,有望发现新的药物显示文摘为了抵抗疾病,很多医药库中的武器是从细菌当中获得的。如今,利用CRISPR-Cas9基因编辑技术。研究人员揭示出沉默基因中隐藏着的更多潜在的宝藏。作为一类常见的细菌。链霉菌被用来产生很多作为抗生素、抗癌试剂和其他药物的化合物。在一项新的研究中。来自美国伊利诺伊大学和新加坡科技研究局的研究人员利用CRISPR-Cas9技术激活链霉菌中不表达的或者说沉默的基因簇。 | Mingzi M Zhang, Wan Lin Yeo, Ee Lui Ang, Huimin Zhao Fong Tian Wong, Elena Heng Yajie Wang, Shangwen Luo, Ryan E Cobb, Behnam Enghiad, Huimin Zhao Yee Hwee Lim | 2017 | 现代生物医学进展2017，17，17： | 12 |
| 4 | Strength degradation of sandstone and granodiorite under uniaxial cyclic loading显示文摘Change in mechanical properties of rocks under static loading has been widely studied and documented.However, the response of rocks to cyclic loads is still a much-debated topic. Fatigue is the phenomenon when rocks under cyclic loading fail at much lower strength as compared to those subjected to the monotonic loading conditions. A few selected cored granodiorite and sandstone specimens have been subjected to uniaxial cyclic compression tests to obtain the unconfined fatigue strength and life. This study seeks to examine the effects of cyclic loading conditions, loading amplitude and applied stress level on the fatigue life of sandstone, as a soft rock, and granodiorite, as a hard rock, under uniaxial compression test. One aim of this study is to determine which of the loading conditions has a stronger effect on rock fatigue response. The fatigue response of hard rocks and soft rocks is also compared. It is shown that the loading amplitude is the most important factor affecting the cyclic response of the tested rocks. The more the loading amplitude, the shorter the fatigue life, and the greater the strength degradation. The granodiorite specimens showed more strength degradation compared to the sandstone specimens when subjected to cyclic loading. It is shown that failure modes of specimens under cyclic loadings are different from those under static loadings. More local cracks were observed under cyclic loadings especially for granodiorite rock specimens. | Rashid Geranmayeh Vaneghi Behnam Ferdosi Achola D.Okoth Barnabas Kuek | 2018 | Journal of Rock Mechanics and Geotechnical Engineering2018，10，1： | 11 |
| 5 | Elevated temperature oxidation behavior of HVOF sprayed TiB_2 cermet coating显示文摘Oxidation behaviors of Ni(Cr)-TiB2 coating deposited by HVOF technique were studied at 800,900 and 1 000℃in air. The microstructures of as-sprayed and oxidized coatings were characterized by X-ray diffractometry(XRD)and scanning electron microscopy(SEM).After oxidation at 800℃,a thin and adherent oxide layer was formed on the surface of the coating.With increasing exposure temperature,the thickness of the oxide layer increased;and at 1 000℃the oxide layer separated from the coating.Investigation of the kinetics of oxidation by using the thermogravimetric analysis(TGA)technique shows a parabolic oxidation rate. | Behnam LOTFI | 2010 | Transactions of Nonferrous Metals Society of China2010，20，2： | 7 |
| 6 | Influence of vitamin D on liver fibrosis in chronic hepatitis C: A systematic review and meta-analysis of the pooled clinical trials data显示文摘AIM To investigate the relationship between vitamin D and liver fibrosis in hepatitis C-monoinfected or hepatitis C virus(HCV)-human immunodeficiency virus(HIV) coinfected patients. METHODS Pertinent studies were located by a library literature search in PubM ed/Embase/Cochrane/Scopus/LILACS by two individual reviewers. Inclusion criteria:(1) studies with patients with HCV or co-infected HCV/HIV;(2) studies with patients ≥ 18 years old;(3) studies that evaluated liver fibrosis stage, only based on liver biopsy; and(4) studies that reported serum or plasma 25(OH)D levels. Studies that included pediatric patients, other etiologies of liver disease, or did not use liver biopsy for fibrosis evaluation, or studies with inadequate data were excluded. Estimated measures of association reported in the literature, as well as corresponding measures of uncertainty, were recorded and corresponding odds ratios with 95%CI were included in a meta-analysis. RESULTS The pooled data of this systematic review showed that 9 of the 12 studies correlated advanced liver disease defined as a Metavir value of F3/4 with 25(OH) D level insufficiency. The meta-analysis indicated a significant association across studies.CONCLUSION Low vitamin D status is common in chronic Hepatitis C patients and is associated with advanced liver fibrosis. | Alia S Dadabhai Behnam Saberi Katie Lobner Russell T Shinohara Gerard E Mullin | 2017 | World Journal of Hepatology2017，9，5： | 6 |
| 7 | Transjugular intrahepatic portosystemic stent shunt for medically refractory hepatic hydrothorax:A systematic review and cumulative meta-analysis显示文摘AIM:To assess the effectiveness of transjugular intrahepatic portosystemic stent shunt(TIPSS) in refractory hepatic hydrothorax(RHH) in a systematic review and cumulative meta-analysis.METHODS:A comprehensive literature search was conducted on MEDLINE,EMBASE,and Pub Med covering the period from January 1970 to August 2014.Two authors independently selected and abstracted data from eligible studies.Data were summarized using a random-effects model.Heterogeneity was assessed using the I2 test.RESULTS:Six studies involving a total of 198 patients were included in the analysis.The mean(SD) age of patients was 56(1.8) years.Most patients(56.9%) had Child-Turcott-Pugh class C disease.The mean duration of follow-up was 10 mo(range,5.7-16 mo).Response to TIPSS was complete in 55.8%(95%CI:44.7%-66.9%),partial in 17.6%(95%CI:10.9%-24.2%),and absent in 21.2%(95%CI:14.2%-28.3%).The mean change in hepatic venous pressure gradient post-TIPSS was 12.7 mm Hg.The incidence of TIPSS-related encephalopathy was 11.7%(95%CI:6.3%-17.2%),and the 45-d mortality was 17.7%(95%CI:11.34%-24.13%).CONCLUSION:TIPSS is associated with a clinically relevant response in RHH.TIPSS should be considered early in these patients,given its poor prognosis. | Ivo C Ditah Badr F Al Bawardy Behnam Saberi Chobufo Ditah Patrick S Kamath | 2015 | World Journal of Hepatology2015，7，13： | 5 |
| 8 | 纳米颗粒增强纳米流体对刀具磨损形貌的影响(英文)显示文摘高温合金属于硬切削材料,加工性较差。在高温合金加工,刀具磨损被认为是切削性能的主要特征之一。虽然关于高温合金加工过程中影响刀具寿命的因素已有大量报道,但关于纳米粒子稳定性对纳米流体性能的影响以及由此导致的刀具磨损形貌的研究尚未见报道。在本工作中,通过提高基液的稳定性来增强纳米粒子。在此基础上,将切削液中加入表面活性剂作为增强剂,研究新型润滑剂对A286工件刀具磨损形貌的影响。 | Seyed Hasan MUSAVI Behnam DAVOODI Seyed Ali NIKNAM | 2019 | Journal of Central South University2019，26，5： | 5 |
| 9 | A Review on Plug-in Electric Vehicles:Introduction, Current Status, and Load Modeling Techniques显示文摘Plug-in electric vehicle(PEV) load modeling is very important in the operation and planning studies of modern power system nowadays. Several parameters and considerations should be taken into account in PEV load modeling, making it a complex problem that should be solved using appropriate techniques. Different techniques have been introduced for PEV load modeling and each of them has individual specifications and features. In this paper, the most popular techniques for PEV load modeling are reviewed and their capabilities are evaluated. Both deterministic and probabilistic methods are investigated and some practical and theoretical hints are presented. Moreover, the characteristics of all techniques are compared with each other and suitable methods for unique applications are proposed. Finally, some potential research areas are presented for future works. | Ali Ahmadian Behnam Mohammadi-Ivatloo Ali Elkamel | 2020 | Journal of Modern Power Systems and Clean Energy2020，8，3： | 5 |
| 10 | Isolated arterioportal fistula presenting with variceal hemorrhage显示文摘We report a case of life-threatening hematemesis due to portal hypertension caused by an isolated arterioportal fistula (APF). Intrahepatic APFs are extremely rare and are a cause of presinusoidal portal hypertension. Etiologies for APFs are comprised of precipitating trauma, malignancy, and hereditary hemorrhagic telangiectasia, but these were not the case in our patient. Idiopathic APFs are usually due to congenital vascular abnormalities and thus usually present in the pediatric setting. This is one of the first cases of adult-onset isolated APF who presented with portal hypertension and was successfully managed through endoscopic hemostasis and subsequent interventional radiological embolization. | Anupama Nookala Behnam Saberi Ramon Ter-Oganesyan Gary Kanel Phillip Duong Takeshi Saito | 2013 | World Journal of Gastroenterology2013，19，17： | 4 |
| 11 | A simulation study of water injection and gas injectivity scenarios in a fractured carbonate reservoir:A comparative study显示文摘Regarding the enormous demands of numerous industries to fossil fuels,it is essential to select the proper enhanced oil recovery approaches for vertical and horizontal wells to supply the demands with the optimum expenditure.Water and gas injectivity as the secondary enhanced oil recovery techniques would be preferentially considered regarding their low costs of performances rather than chemical recovery and thermal techniques.Injected gas tends to push oil through pores or cracks in the matrix block and lead them to the production well.Therefore,injection of gas may significantly increase the recovery factor in these reservoirs.In this research,different injection scenarios in a fractured carbonate reservoir in the west of Iran are being simulated by the PVT modules of Eclipse software.The purpose of this research is to analyze the possibility of gradually increasing the extent of recovery by injecting carbon dioxide,methane,and water,and different injectivity patterns are considered in this research.The selection of injectivity patterns is severely based on the highest recycling rate of gas injection on different injection scenarios,and the injectivity scenarios were being compared with the natural depletion scenario.Consequently,Co2 injection(about 60%)had the highest oil recovery factor and CH4 and TB(about 54%and 53%)injectivity scenarios had the second and third highest rate of the oil recovery factor. | Afshin Davarpanah Behnam Mirshekari A.Armin Razmjoo | 2019 | Petroleum Research2019，4，3： | 4 |
| 12 | Isogeometric analysis of free-form Timoshenko curved beams including the nonlinear effects of large deformations显示文摘In the present paper, the isogeometric analysis(IGA) of free-form planar curved beams is formulated based on the nonlinear Timoshenko beam theory to investigate the large deformation of beams with variable curvature. Based on the isoparametric concept, the shape functions of the field variables(displacement and rotation) in a finite element analysis are considered to be the same as the non-uniform rational basis spline(NURBS) basis functions defining the geometry. The validity of the presented formulation is tested in five case studies covering a wide range of engineering curved structures including from straight and constant curvature to variable curvature beams. The nonlinear deformation results obtained by the presented method are compared to well-established benchmark examples and also compared to the results of linear and nonlinear finite element analyses. As the nonlinear load-deflection behavior of Timoshenko beams is the main topic of this article, the results strongly show the applicability of the IGA method to the large deformation analysis of free-form curved beams. Finally, it is interesting to notice that, until very recently, the large deformations analysis of free-form Timoshenko curved beams has not been considered in IGA by researchers. | Seyed Farhad Hosseini Ali Hashemian Behnam Moetakef-Imani Saied Hadidimoud | 2018 | Acta Mechanica Sinica2018，34，4： | 4 |
| 13 | A collaborative approach for urban underground space development toward sustainable development goals:Critical dimensions and future directions显示文摘The utilization of urban underground space(UUS)offers an effective solution to urban problems but may also negatively affect urban development.Therefore,UUS development needs better concerted guidelines to coordinate various urban systems and the multiple components of the underground world.Sustainable Development Goals(SDGs),which should be viewed as important yardsticks for UUS development,do not explicitly mention urban underground space,although many of them are affected by both the positive and negative consequences of its development.To fill this gap,this review lays the foundations of relevant UUS concepts and uses exemplary cases to reveal that 11 out of 17 SDGs can be linked with UUS uses.These linkages also manifest that land administration,integrated planning,architectural design,and construction technology are critical dimensions for increasing the contributions of UUS to the realization of SDGs.To achieve multi-disciplinary synergies among these four critical dimensions,a collaborative approach framework based on spatial data infrastructure is required.Thus,this work provides academics and practitioners with a holistic view of sustainable UUS development. | Fang-Le PENG Yong-Kang QIAO Soheil SABRI Behnam ATAZADEH Abbas RAJABIFARD | 2021 | Frontiers of Structural and Civil Engineering2021，15，1： | 4 |
| 14 | Prediction of plastic zone size around circular tunnels in non-hydrostatic stress field显示文摘This paper discusses the calculation of plastic zone properties around circular tunnels to rock-masses that satisfy the Hoek–Brown failure criterion in non-hydrostatic condition,and reviews the calculation of plastic zone and displacement,and the basis of the convergence–confinement method in hydrostatic condition.A two-dimensional numerical simulation model was developed to gain understanding of the plastic zone shape.Plastic zone radius in any angles around the tunnel is analyzed and measured,using different values of overburden(four states)and stress ratio(nine states).Plastic zone radius equations were obtained from fitting curve to data which are dependent on the values of stress ratio,angle and plastic zone radius in hydrostatic condition.Finally validation of this equation indicate that results predict the real plastic zone radius appropriately. | Behnam Bagheri Fazlollah Soltani Hamid Mohammadi | 2014 | International Journal of Mining Science and Technology2014，24，1： | 3 |
| 15 | Performance-based semi-active control algorithm for protecting base isolated buildings from near-fault earthquakes显示文摘基础孤立的结构被发现了在在由于可以在近来源的地面运动存在的长时期脉搏的近差错的区域的风险。包括被动、活跃、半活跃的控制系统,各种各样的控制策略被调查了克服这个问题。这研究基于在相应于各种各样的地震危险层次的摇晃的地面的不同层次期间从一座孤立的大楼期望的几个性能层次集中于一个半活跃的控制算法的开发。建议基于表演的算法基于著名半活跃的 skyhook 控制算法的一个修改版本。取决于摇晃的水平的控制获得在结构上强加了的建议控制算法变化。建议控制系统用在受到七个放大地面运动记录的一座基础孤立的基准大楼上执行的一系列分析被评估了。模拟结果证明最新建议的算法在改善是有效的结构并且为选择地震的大楼的 nonstructural 性能。 | Behnam Mehrparvar Taramarz Khoshnoudian | 2012 | Earthquake Engineering and Engineering Vibration2012，11，1： | 3 |
| 16 | Vitamin D levels do not predict the stage of hepatic fibrosis in patients with non-alcoholic fatty liver disease: A PRISMA compliant systematic review and meta-analysis of pooled data显示文摘AIM To investigate the relationship between 25-hydroxyvitamin D [25(OH)D] levels and fibrosis stage in patients with non-alcoholic fatty liver disease(NAFLD).METHODS Two individual reviewers identified relevant studies using the Pub Med, EMBASE, Cochrane, and Scopus databases. Inclusion criteria were as follows:(1) Studies that evaluated adults with NAFLD and serum or plasma 25(OH)D levels; and(2) assessed fibrosis stage using liver biopsy. A rigorous analysis yielded six articles as having sufficient data to employ in evaluating the association of serum vitamin D levels in patients with NAFLD based on their liver fibrosis stage by histopathological analysis. The lead investigators of each of the six studies were contacted and the data were collected. To meta-analyze vitamin D levels in F0-F2 vs F3-F4 fibrosis, a random-effects meta-analysis fit using restricted maximum likelihood was applied. To examine trends across each stage of fibrosis with respect to vitamin D levels, a meta-regression was performed. P < 0.05 was considered statistically significant. RESULTS A total of 937 subjects from six studies were included in the final analysis to evaluate the association of serum vitamin D levels in patients with NAFLD based on their liver fibrosis stage by histopathological analysis. The lead investigators of each of the six studies were contacted and the data were collected. First, the investigators performed a meta-analysis to compare serum vitamin D levels in patients with NAFLD with stage F0-F2 compared to F3-F4, which did not show significance [meta-estimate of the pooled mean difference =-0.86, P = 0.08(-4.17, 2.46)]. A metaregression evaluation of serum vitamin 25(OH)D levels across the individual stages(F0-F4) of fibrosis did not show an association for the six included studies.CONCLUSION Low vitamin D status is not associated with higher stages of liver fibrosis in patients with NAFLD. | Behnam Saberi Alia S Dadabhai Julie Nanavati Lin Wang Russell T Shinohara Gerard E Mullin | 2018 | World Journal of Hepatology2018，10，1： | 3 |
| 17 | In-vitro bioactivity evaluation and physical properties of an epoxy-based dental sealer reinforced with synthesized fluorine-substituted hydroxyapatite, hydroxyapatite and bioactive glass nanofillers显示文摘The purpose of this study was to evaluate the physical properties and bioactivity potential of epoxy-based dental sealers modified with synthesized bioactive glass(BAG),hydroxyapatite(HA)and fluorine substituted hydroxyapatite(FHA)nanoparticles.The synthesized powders were incorporated at 10%and 20%into the epoxy-based dental sealer.The setting time,flow and solubility and microhardness of the modified and unmodified samples were examined.The bioactivity was evaluated using FESEM-EDX and elemental mapping,ATR-FTIR and XRD.The flow value of all of the experimental groups except the FHA modified samples,was greater than 20 mm.Concerning solubility,no specimens exhibited more than 1%weight loss.The solubility value of the FHA groups was statistically significant lower than other groups(p≤0.001).The mean hardness values of all of the modified samples were significantly higher than the unmodified group(p≤0.001).Regarding bioactivity,in vitro study revealed that after 3 days immersion in SBF a compact and continuous calcium phosphate layer formed on the surface of epoxy sealers containing BAG and HA nanoparticles.Based on these results,the addition of BAG and HA nanoparticles did not adversely alter the physical properties of epoxy sealers.Additionally,they improved the in vitro bioactivity of the epoxy sealer. | Bahaa Abdulrazzaq Jerri Al-Bakhsh Farhad Shafiei Atieh Hashemian Kiana Shekofteh Behnam Bolhari Marjan Behroozibakhsh | 2019 | Bioactive Materials2019，4，1： | 3 |
| 18 | Microstructure and Sliding Wear Behaviour of Ni(Cr)-TiB_2 Coatings Deposited by HVOF Spraying of SHS Powders显示文摘This work reports research concerning the microstructure and sliding wear behaviour of cermet coatings deposited by high velocity oxy-fuel (HVOF) spraying. Two cermets were prepared with the following target compositions namely, Ni (Cr)-65 wt.% TiB2 and Ni (Cr)-40 wt.% TiB2. Coating microstructures were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD), whilst microhardness and sliding wear tests were performed on the coatings to evaluate their performance. The HVOF sprayed deposits had layered, splat-like morphologies typical of thermally sprayed cermets. Coatings consisted primarily of TiB2 particles in a nickel-based binder phase. Other minor peaks in the XRD patterns belong to TiB, Ni2B, NiTiO3 and Ti2Oj. The coatings exhibit an amorphous halo in the diffraction pattern between 2 values of 40° and 50°. Sliding wear behaviour was examined using a conventional ball-on-disc apparatus. A sintered ceramic ball (A12O3) was employed as the counterface. The Ni (Cr)-65 wt.% TiB2 coating had a lower wear rate than Ni (Cr)-40 wt.% TiB2 coating. This may be related to the larger sizes of borides. Wear scar morphologies, on both coatings were examined by using SEM and EDAX detecting in order to establish the wear mechanism. Wear is proposed to proceed by subsurface cracking in these coatings. | Behnam Lotfi Zohreh Sadeghian | 2004 | 材料热处理学报2004，25，05B： | 3 |
| 19 | Supramolecular synthesis of 3,4-dihydropyrimidine-2(1H)-one/thiones under neat conditions显示文摘有效溶剂为各种各样的 3,4-dihydropyrimidin-2 (1H ) 的合成的免费方法在把 sulfonated -cyclodextrine 用作 recyclable 催化剂的优秀收益的 -one/thiones 被描述。Sulfonated -cyclodextrine 被发现有效,异构的催化剂和显示出的率改进,高收益和短反应在这转变预定的 recyclable。 | Sekineh Asghari Mahmood Tajbakhsh Behnam Jafarzadeh Kenari Samad Khaksar | 2011 | Chinese Chemical Letters2011，22，2： | 3 |
| 20 | Microstructural characteristics and mechanical properties of Al-2024 alloy processed via a rheocasting route显示文摘This article reports the effects of stirring speed and T6 heat treatment on the microstructure and mechanical properties of Al-2024 alloy synthesized by a rheocasting process.There was a decrease in grain size of α-Al particles corresponding to an increase in stirring speed.By increasing the stirring speed,however,the globularity of matrix particles first increased and then declined.It was also found that the hardness,compressive strength,and compressive strain increased with the increase of stirring speed.Microstructural studies revealed the presence of nonsoluble Al_(15)(CuFeMn)_3Si_2 phase in the vicinity of CuAl_2 in the rheocast samples.The required time for the solution treatment stage was also influenced by stirring speed;the solution treatment time decreased with the increase in stirring speed.Furthermore,the rheocast samples required a longer homogenization period compared to conventionally wrought alloys.Improvements in hardness and compressive properties were observed after T6 heat treatment. | Behnam Rahimi Hamed Khosravi Mohsen Haddad-Sabzevar | 2015 | International Journal of Minerals,Metallurgy and Materials2015，22，1： | 3 |
您所在的机构暂未开通此部分的功能，请联系管理员