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Association of gastroesophageal reflux disease and laryngeal cancer

World Journal of Otorhinolaryngology-Head and Neck Surgery 2018年第4期4卷 278-281页

作者： Mursalin M.Anis mir-muhammad razavi Xiao Xiao Ahmed M.S.Soliman Coastal Ear Nose and ThroatJersey Shore University Medical CenterNeptuneNJUSA Lewis Katz School of Medicine at Temple University PhiladelphiaPAUSA Department of Statistics Fox School of BusinessTemple UniversityPhiladelphiaPAUSA Department of Otolaryngology e Head and Neck Surgery Lewis Katz School of Medicine at Temple UniversityPhiladelphiaPAUSA

Objective:Studies examining the association of reflux disease with the risk of developing laryngeal cancer have both proven and disproven the null ***:This retrospective caseecontrol study examines the association of reflux in two populations exposed to similar risk factors,including tobacco,to the extent that end-organ malignant transformation has *** IRB approval was obtained,a search of our hospital’s cancer center’s database was performed from 2000 to 2013.A retrospective chart review was then performed and the prevalence of gastroesophageal reflux disease among patients with laryngeal cancer(n Z 290)was *** was then compared to the prevalence of gastroesophageal reflux disease among patients presenting with lung cancer(n Z 2440)during the same time period.A multivariate logistic regression was performed to determine the association of reflux with laryngeal ***:Taking into consideration tobacco use,there was a strong association between male gender and occurrence of laryngeal cancer as opposed to lung cancer(OR Z 3.30;95%CI 2.53e4.36,P<0.001).There was a modest association between reflux and laryngeal cancer(OR Z 1.65;95%CI 1.19e2.25,P Z 0.003).However,there was no association between reflux and the propensity for carcinoma in specific laryngeal subsites(P Z 0.47).Conclusions:In this study examining a heterogeneous population with end-organ malignancy there was a modest association between reflux and laryngeal *** research is necessary to determine the biologic relevance of this finding.

关键词： Laryngopharyngeal reflux GERD Extraesophageal reflux Laryngeal cancer Lung cancer

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SYNTHESIS AND CHARACTERIZATION OF NANOSTRUCTURED-SEGMENTED BLOCK COPOLYETHERAMIDE BASED ON NYLON6 AND POLY(ETHYLENE OXIDE)

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Chinese Journal of Polymer Science 2010年第4期28卷 597-605页

作者： Majid Peyravi Masoomeh Akhfash Ardestani Ali Akbar Babaluo mir Karim razavi Aghjeh Seyed Roohollah Pishghadam Elham Jannatdoust Nanostructure Materials Research Center(NMRC) Sahand University of TechnologyP.O.Box 51335/1996TabrizI.R.Iran Chemical Engineering Department Sahand University of TechnologyP.O.Box 51335/1996TabrizI.R.Iran Institute of Polymeric Materials Sahand University of TechnologyP.O.Box 51335/1996TabrizI.R.Iran Polymer Engineering Department Sahand University of TechnologyP.O.Box 51335/1996TabrizI.R.Iran

Segmented block copolymer based on nylon6 （N6） and polyethylene oxide （PEO） with stochiometric ratio was synthesized via a two-step process. The first step represents end capping of N6 in the presence of adipic acid leading to carboxy terminated N6, and the second one is polycondensation of the latter product with PEO in the presence of catalyst and thermostabilizer to form a high molecular weight multi-block copolymer. Several methods were applied to characterize the synthesized copolyrner such as Fourier transform infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, differential thermal analysis, differential scanning calorimetry, X-ray diffraction and atomic force microscopy. The obtained results confirmed the multi-block structure for copolymer with a very high degree of micro-phase separation. Atomic force microscopy micrographs indicated that the morphology was the dispersion of high stiffness nanostructured polyamide （PA） domains in the amorphous region of PEO matrix, which can be very important in their performance for membrane processes.

关键词： Copolyetheramide Segmented block Nylon6 Poly(ethylene oxide) Nanomaterial

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Phenological Stage, Plant Biomass, and Drought Stress Affect Microbial Biomass and Enzyme Activities in the Rhizosphere of Enteropogon macrostachyus

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Pedosphere 2019年第2期29卷 259-265页

作者： Kevin Z.MGANGA Bahar S.razavi muhammad SANAULLAH Yakov KUZYAKOV Department of Soil Science of Temperate Ecosystems Institute of Soil Science University of G?ttingen Department of Range and Wildlife Sciences South Eastern Kenya University Department of Agricultural Soil Science Institute of Soil Science University of G?ttingen Institute of Soil and Environmental Sciences University of AgricultureFaisalabad Institute of Environmental Sciences Kazan Federal University

Indigenous grasses have been effectively used to rehabilitate degraded African drylands. Despite their success, studies examining their effects on soil bioindicators such as microbial biomass carbon(C) and enzyme activities are scarce. This study elucidates the effects of drought stress and phenological stages of a typical indigenous African grass, Enteropogon macrostachyus, on microbial biomass and enzyme activities(β-glucosidase, cellobiohydrolase, and chitinase) in the rhizosphere soil. Enteropogon macrostachyus was grown under controlled conditions. Drought stress(partial watering) was simulated during the last 10 d of plant growth, and data were compared with those from optimum moisture conditions. The rhizosphere soil was sampled after 40 d(seedling stage), 70 d(elongation stage), and 80 d(simulated drought stress). A high root:shoot ratio at seedling stage compared with elongation and reproduction stages demonstrated that E. macrostachyus invested more on root biomass in early development, to maximise the uptake of nutrients and water. Microbial biomass and enzyme activities increased with root biomass during plant growth. Ten-day drought at reproduction stage increased the microbial biomass and enzyme activities, accompanying a decrease in binding affinity and catalytic efficiency. In conclusion, drought stress controls soil organic matter decomposition and nutrient mobilization, as well as the competition between plant and microorganisms for nutrient uptake.

关键词： African grass catalytic efficiency cellobiohydrolase chitinase β-glucosidase nutrient uptake optimum moisture soil bioindicators

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Numerical and Performance Analysis of one row Transonic Rotor with Sweep and Lean angle

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Journal of Thermal Science 2014年第5期23卷 438-445页

作者： Seyed Reza razavi Masoud Boroom Aerospace Engineering Department AmirKabir University of Technology

In this study,aerodynamic behaviors of swept and leaned blades were *** and tangential blade curvatures impacts on compressor's operating parameters were analyzed separately.A commercial CFD program which solves the Reynolds-averaged Navier-Stokes equations was used to find out the mentioned impact and the complicated flow field of transonic *** CFD method that was used for solving flow field's equation was validated by experimental data of NASA Rotor *** results showed that the compressor with curved rotors had higher efficiency,rotor pressure ratio and stable operating range compared to the compressor with un-curved *** curved rotors mostly had higher impact on the overall stable operating range compared to the other operating *** range involves choking point and stall point that were changed separately by using of bended *** finding the detailed impact of sweep and lean angle on transonic blades,various forms of lean and sweep angles were exerted to basic *** was found that sweep angles increased overall operating range up to 30%,efficiency up to 2%and pressure ratio up to 1%.Leaning the blades increased the safe operating range,the pressure ratio and efficiency by 14%,4%and 2%respectively.

关键词： compressor performance efficiency stable operational range surge improvement swept Rotor leaned rotor

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2-Amino-4-(4-aminophenyl)thiazole application as an ionophore in the construction of a Lu(Ⅲ) selective membrane sensor

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Chinese Chemical Letters 2012年第3期23卷 343-346页

作者： Mohammad Reza Pourjavid Taherehsadat razavi NFCRS Nuclear Science&Technology Research InstituteAEOIP.O.Box 11365-8486TehranIran Instrumental Analysis Department Research Institute of Petroleum Industry(RIPI)P.O.Box 14665-137TehranIran

A derivative of thiazole（AAT） has been explored as a sensing material for preparation a selective Lu（III） PVC-based membrane *** proposed sensor exhibits a Nernstian response over a wide concentration range from 1.0×10^（-6） to 1.0×10^（-1） mol/L of Lu（Ⅲ） and the detection limit is 5.7×10^（-7） mol/*** sensor response is independent of pH of the solution in the range 3.2-8.8 and possesses the advantages of fast response time（～6） and in particular,good selectivity to the lutetium ions with regard to most common metal ions,and especially all lanthanide ions.

关键词： Membrane sensor Lu(Ⅲ) selective Thiazole derivative PVC Potentiometry

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Effects of turmeric(Curcuma longa)and its constituent(curcumin)on the metabolic syndrome:An updated review

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Journal of Integrative Medicine 2022年第3期20卷 193-203页

作者： Zeinab Vafaeipour Bibi Marjan razavi Hossein Hosseinzadeh Student Research Committee Mashhad University of Medical SciencesMashhad ***Iran Department of Pharmacodynamics and Toxicology School of PharmacyMashhad University of Medical SciencesMashhad ***Iran Targeted Drug Delivery Research Center Pharmaceutical Technology InstituteMashhad University of Medical SciencesMashhad ***Iran Pharmaceutical Research Center Pharmaceutical Technology InstituteMashhad University of Medical SciencesMashhad ***Iran

Metabolic syndrome(MS)involves people with the following risk factors:obesity,hypertension,high glucose level and *** can increase the risk of heart disease,stroke and type 2 diabetes *** prevalence of MS in the world’s adult population is about 20%–25%.Today,there is much care to use medicinal ***(Curcuma longa)as well as curcumin which is derived from the rhizome of the plant,has been shown beneficial effects on different components of ***,the purpose of this manuscript was to introduce different in vitro,in vivo and human studies regarding the effect of turmeric and its constituent on ***,different mechanisms of action by which this plant overcomes MS have been *** on studies,turmeric and its bioactive component,curcumin,due to their anti-inflammatory and antioxidant properties,have antidiabetic effects through increasing insulin release,antihyperlipidemic effects by increasing fatty acid uptake,anti-obesity effects by decreasing lipogenesis,and antihypertensive effects by increasing nitric *** to several in vivo,in vitro and human studies,it can be concluded that turmeric or curcumin has important values as a complementary therapy in ***,more clinical trials should be done to confirm these effects.

关键词： Turmeric Curcuma longa Curcumin Metabolic syndrome Diabetes Hyperlipidemia

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The Impact of the Covid-19 Pandemic on Iranian Oil and Gas Industry Planning:A Survey of Business Continuity Challenges

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International Journal of Disaster Risk Science 2022年第3期13卷 391-400页

作者： Seyyed Abdollah razavi Ali Asgary Marjan Khaleghi Department of Energy Economics and Management Tehran Faculty of PetroleumPetroleum University of Technology***TehranIran Disaster&Emergency Management School of Administrative StudiesFaculty of Liberal Arts&Professional StudiesYork UniversityTorontoONM3J 1P3Canada Department of Industrial Engineering Abadan Faculty of PetroleumPetroleum University of Technology***AbadanKhuzestanIran

The Covid-19 pandemic has severely affected various aspects of life,and its compounding and cascading impacts have been observed in most industries and *** oil and gas(O&G)industry was among the first to experience the impacts as the pandemic began due to the global economic recession and a sharp decline in demand for *** pandemic revealed major risk management and business continuity challenges and uncovered some of the vulnerabilities of the O&G industry and its major companies during a prolonged global *** and understanding how the Covid-19 pandemic impacted the O&G sector in different countries,considering their unique circumstances,can provide important lessons for managing the current and future similar *** study investigated various impacts of the Covid-19 pandemic on the O&G industry using Iran's Pars Oil and Gas Company(POGC)as a case *** were collected through indepth interviews with key managers of the *** methods,specifically thematic analysis,were used to analyze the *** of this study provide further insights into how the pandemic impacted the operations,risks,and business continuity of the *** results show that the pandemic caused significant operational,financial,and legal impacts by disrupting routine maintenance,reducing the availability of human resources under the public health measures and mobility restrictions,increasing processing and delivery times,increasing costs and decreasing revenues,and delaying contractual obligations.

关键词： Business continuity Covid-19 pandemic Global disaster Iran Oil and gas industry Pars Oil and Gas Company

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Single neutron hole entropy in ^(105)Cd and ^(111)Cd

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Nuclear Science and Techniques 2015年第5期26卷 98-101页

作者： Z.Moradipoor R.razavi Physics Group North Tehran Branch Islamic Azad University Department of Physics Faculty of Science Imam Hossein Comprehensive University

The nuclear level density and entropy were calculated for105 Cd,106Cd,111 Cd and112Cd based on the Back Shifted Fermi Gas(BSFG) model and the Constant Temperature(CT) model. Then, the entropies were extracted in the microcanonical ensemble according to recent experimental data on nuclear level density measured by the Oslo group for these nuclei and are compared with their corresponding macroscopic calculations. Entropies of the neutron hole were estimated from the entropy difference between the odd-mass and even-even nuclei. The results reveal that the CT model describes better the extracted microcanonical results.

关键词：熵差中子微正则系综黑洞核能级密度 T模型费米气体实验数据

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A Distance Function for Computing on Finite Subsets of Euclidean Spaces

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Acta Mathematicae Applicatae Sinica 2018年第1期34卷 197-208页

作者： Hajar Ghahremani-Gol Farzad Didehvar Asadollah razavi Department of Mathematics Faculty of Science Shahed University Tehran *** Iran Department of Mathematics and Computer Science Amirkabir University of Technology 424 Hafez Av Tehran *** Iran Department Pure Mathematics Faculty of Mathematics and Computer Science Shahid Bahonar University of Kerman Kerman Iran

In practical purposes for some geometrical problems, specially the fields in common with computer science, we deal with information of some finite number of points. The problem often arises here is： “How are we able to define a plausible distance function on a finite three dimensional space？” In this paper, we define such a distance function in order to apply it to further purposes, e.g. in the field settings of transportation theory and geometry. More precisely, we present a new model for traveling salesman problem and vehicle routing problem for two dimensional manifolds in three dimensional Euclidean space, the second problem on which we focus on this line is, three dimensional triangulation.

关键词： geodesic least square method vehicle routing problem traveling salesman problem three dimensional triangulation

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Weldability and liquation cracking behavior of ZhS6U superalloy during electron-beam welding

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International Journal of Minerals,Metallurgy and Materials 2019年第2期26卷 251-259页

作者： Arash Khakzadshahandashti Mohammad Reza Rahimipour Kourosh Shirvani Mansour razavi Department of Ceramic Materials and Energy Research Center Department of Material and Renewal Energy Iranian Research Organization for Science and Technology (IROST)

The weldability of the ZhS6U nickel-based superalloy, which is prone to solidification cracking during electron-beam welding(EBW) repair processes, was investigated. The effects of two different pre-weld heat-treatment cycles on the final microstructure before and after welding were examined. Welds were made on flat coupons using an EBW machine, and the two heat-treatment cycles were designed to reduce γ′ liquation before welding. Microstructural features were also examined by optical and scanning electron microscopy. The results showed that the change in the morphology and size of the γ′ precipitates in the pre-weld heat-treatment cycles changed the ability of the superalloy to release the tensile stresses caused by the matrix phase cooling after EBW. The high hardness in the welded coupons subjected to the first heat-treatment cycle resulted in greater resistance to stress release by the base alloy, and the concentration of stress in the base metal caused liquation cracks in the heat-affected zone and solidification cracks in the weld area.

关键词： weldability ZhS6U superalloy electron beam welding heat-affected zone liquation cracking pre-weld heat treatment

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