نتایج جستجو برای: ultra filtration

تعداد نتایج: 95871  

Journal: :Mining, metallurgy & exploration 2021

Abstract Investigation and uptake of filtered tailings continues to grow throughout the globe. This is driven by a wide range site-specific considerations, which include such factors as characteristics (e.g., amenability filtration), production rates, climate, water availability, cost drivers, environmental requirements, social factors. Despite aforementioned technological growth, currently ava...

Journal: :iranian journal of radiology 0
ahmad enhesari department of radiology, faculty of medicine and health sciences, kerman university of medical sciences, kerman, iran saeid mardpour department of radiology, faculty of medicine and health sciences, kerman university of medical sciences, kerman, iran; department of radiology, faculty of medicine and health sciences, kerman university of medical sciences, kerman, iran. tel: +98-9128112932, fax: +98-3413222247 zohreh makki department of radiology, faculty of medicine and health sciences, kerman university of medical sciences, kerman, iran soura mardpour applied cell sciences department, school of advanced technologies in medicine, tehran university of medical sciences, tehran, iran

conclusions: in this study, kidney transplant recipients with a lower ri and pi and a higher edv at 1week showed better graft function at 6 months after transplantation. results: fourteen patients (15.4%) had impaired graft function after 6 months (gfr less than 60 ml/min/1.73m2). multivariate linear regression analysis showed significant correlation between gfr at 6 months and ri, pi and edv w...

Journal: :iranian endodontic journal 0
hengameh akhavan dental school, islamic azad university of medical science, tehran, iran. anahid ahmadi faculty of dentistry, azad university of medical sciences peyman mehrvarzfar dental school, islamic azad university of medical science, tehran, iran. anahid ahmadi birjandi private practice

introduction : the aim of this study was to examine and compare the apical sealing ability of ah26, ah plus and ah plus jet using a fluid filtration model. materials and methods : 70 single-rooted teeth were dissected from the cement-enamel junction. canals were prepared with protaper rotary system and manual k files and irrigated with 5.25% naocl and 17% edta. ten teeth were assigned as contro...

Journal: :iranian endodontic journal 0
payman mehrvarzfar department of endodontics, dental school, azad university of medical science, tehran, iran. mohammad ali saghiri instructor, kamal asgar research center (karc), mi, usa. kasra karamifar department of endodontics, dental school, azad university of medical science, tehran, iran. zohre khalilak department of endodontics, dental school, azad university of medical science, tehran, iran. nahid maalek private practice, tehran, iran.

introduction: adequate root canal seal following retreatment is essential for a successful outcome. resilon/epiphany (r/e) obturation system has been introduced as a substitute for conventional gutta-percha/sealer method. this in vitro study compared the amount of apical microleakage of r/e with gutta-percha/ah26 (gp/ah26) sealer as secondary root canal filling following retreatment in human te...

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
seyed mohsen jalalzade mashhad, iran. elham khoshbin dental school, hamedan university of medical science, hamedan, iran seyed abdolkarim tabatabaei shahid beheshti university of medical science, tehran, iran. ghasem ansari dental school, shahid beheshti university of medical science, tehran, iran.

objective: the aim of this study is to measure the effect of different condensation pressure on the microleakage of mineral trioxide aggregate (mta).  methods: this study was an invitro study. a total of 55 single rooted straight-canal human extracted sound teeth free of cracks or calcification were selected. teeth were sectioned from cej region at 3 mm above the root apex. remaining specimens ...

Journal: :iranian journal of medical physics 0
sh. olumi m.sc. in medical physics, tarbiat modarres university, tehran, iran h. rajabi assistant professor, medical physics dept., tarbiat modarres university, tehran, iran s.r. zakavi associate professor, nuclear medicine dept., imam reza hospital, mashhad university of medical sciences, mashhad, iran e. hajizade associate professor, biostatistics dept., tarbiat modarres university, tehran, iran h. ghiasi m.sc. in medical physics, torfe hospital, tarbiat modarres university, tehran, iran

introduction: one of the major problems in the development of nuclear medicine images is the presence of noise. the noise level in nuclear medicine images is usually reduced by the analysis of imaging data in a fourier transform environment. the main drawback of this environment belongs to low signal to noise ratio in high frequencies because removing noise frequencies may remove data and times...

Journal: :journal of applied research in water and wastewater 2015
lee fergusson

stormwater represents one of the least researched forms of wastewater in environmental science. contaminated industrial stormwater, that is stormwater generated by runoff from industrial sites such as refineries, smelters and mine sites, is even less well understood. however, contaminated industrial stormwater can have damaging environmental impacts because it generally occurs in sudden bursts ...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
atieh adli fariborz rashidi rouhollah farajzadeh

in petroleum production, produced water re-injection (pwri) has earned much interest among disposal methods of the produced water. however, presence of the contaminants in the produced waters usually results in formation damage in well bores and their surrounding fracture systems. in the present study, modeling of external cake formation on a fracture in unsteady-state conditions is discussed. ...

Journal: :حقوق خصوصی 0
حمید باقرزاده دکتری حقوق خصوصی، پردیس بین المللی کیش، دانشگاه تهران، کیش، ایران

the concept of “ultra vires” has been studied in two specific areas: in company law and in discussions on the issues of capacity and acts of representatives. historically, in english law, ultra vires acts were considered as void, and neither representatives nor shareholders could approve them at a later time. subsequently, judges in common law system changed their approach from a restricted cap...

In this paper a novel very high performance current mirror is presented. It favorably benefits from such excellent parameters as: Ultra high output resistance (36.9GΩ), extremely low input resistance (0.0058Ω), low output (~0.18V) and low input voltage (~0.18V) operation, very low power consumption (20μW), very low offset current (1pA), ultra wide current dynamic range (150dB), and ultra high a...

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