نتایج جستجو برای: qth

تعداد نتایج: 267  

2009
GEOFFREY R. GRIMMETT

Correlation inequalities are presented for functionals of a ferromagnetic Potts model with external field, using the random-cluster representation. These results extend earlier inequalities of Ganikhodjaev–Razak and Schonmann, and yield also GKS-type inequalities when the spin-space is taken as the set of qth roots of unity.

Journal: :Revista Mexicana De Ingenieria Quimica 2021

The Thomas model is the most common equation to describe dynamics of fixed-bed adsorption columns. However, its parameters’ validity strongly depends on region breakthrough curve considered for data fitting. A rigorous analysis based different error functions was carried out determine accuracy both linear and non-linear forms model. proved be more robust less susceptible experimental error, wit...

Journal: :Medicina oral, patologia oral y cirugia bucal 2010
Gulfem Ergun Ferhan Egilmez Isil Cekic-Nagas

OBJECTIVE The aim of this study was to compare the cytotoxic effects of various resin-based core materials that were cured with three light curing units (LCUs) in different modes on L-929 mouse fibroblast cells over 24 h and 72 h periods. STUDY DESIGN Eighty-four cylindrical discs (2 mm in thickness and 6 mm in diameter) of each material (Rebilda, Voco; Build-It FR, Pentron; Clearfil DC Core,...

ژورنال: :مجله دانشگاه علوم پزشکی شهید صدوقی یزد 0
عبدالرحیم داوری ar davari dental school, shahid sadoughi university of medical sciences, yazd, iranدانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید صدوقی یزد علیرضا دانش کاظمی ar daneshkazemi dental school, shahid sadoughi university of medical sciences, yazd, iranدانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید صدوقی یزد محمد جواد شاه بلی اردکانی mj shahboli ardakani dental school, shahid sadoughi university of medical sciences, yazd, iranدانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید صدوقی یزد مرضیه مومنی سروستانی m momeni sarvestani dental school, shahid sadoughi university of medical sciences, yazd, iranدانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید صدوقی یزد

مقدمه: منبع های نوری متفاوت بر روی استحکام باند ترمیم ها تأثیر می گذارند. از این رو هدف از این مطالعه بررسی اثر منابع نوری مختلف بر ریز استحکام باند کششی دو نوع ادهزیو به عاج بود. روش بررسی: در این مطالعه 60 گونه، در 6 گروه ده تایی مورد بررسی قرار گرفت. نمونه ها تعدادی دندان مولرکشیده شده انسان بود. پس از سایش مینا از سطح باکال هر دندان به وسیله فرز و نمایان شدن عاج سطحی، کامپوزیت رزین(z250) به...

دانش کاظمی, علیرضا, داوری, عبدالرحیم, شاه بلی اردکانی, محمد جواد , مومنی سروستانی, مرضیه,

Introduction: Different light sources influence restoration bond strength. Therefore the purpose of this study was evaluation of the microtensile bond strength of two types of sixth generation adhesives in different light sources. Methods: some sound human molars were collected. 10 sample in each group was prepared that totally 60 samples were investigated. In each tooth some dentinal specime...

Journal: :journal of dental materials and techniques 0
iman iman parisay department of pediatric dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) zahra zahra bahrololomi department of pediatric dentistry, shahid sadoughi university of medical sciences, yazd, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید صدوقی یزد (shahid sadooghi university of medical sciences) maryam maryam ghafournia department of pediatric dentistry, esfahan university of medical sciences, esfahan, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی اصفهان (isfahan university of medical sciences) ali-asghar ali-asghar solaimani department of pediatric dentistry, international branch of tehran university of medical sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (tehran university of medical sciences) alireza alireza boruziniat restorative dentistry, dental research center, school of dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences)

introduction: the aim of this study was to evaluate the influenceof different light curing systems and curing times on the micro-hardness of aresin modified glass ionomer. methods: forty two samples of resinmodified glass ionomer (rmgi) were prepared using stainless steel cylindrical mold(8 × 2 mm) and randomly divided into six groups of seven. three groups werecured with a quartz tungsten halo...

2014
Behnaz Esmaeili Hengameh Safarcherati Assila Vaezi

UNLABELLED Background and aims. Today light cured composites are widely used. Physical and mechanical properties of composites are related to the degree of conversion. Light curing unit (LCU) is an important factor for composite polymerization. Aim of this study is evaluation of composite resins hardness using halogen and LED light curing units. Materials and methods. In this study, 30 samples ...

Journal: :Journal of Geometric Analysis 2022

This paper gives a systematic study to the general dual-polar Orlicz–Minkowski problem (e.g., Problem 4.1). involves dual volume $${\widetilde{V}}_G(\cdot )$$ recently proposed in Gardner et al. (Calc Var PDE 58:35, 2019; 59:33, 2020) order problem. As extends and qth volume, is “polar" initiated “dual" newly polar Luo (Indiana Univ Math J 69:385–420, 2020). The existence, uniqueness continuity...

Journal: :journal of dentomaxillofacil radiology, pathology and surgery 0
shaghayegh razavi dental materials research cen ter, department of operative dentistry, faculty of dentistry, babol university of medical sciences, babol-iran. behnaz esmaeili dental materials research cen ter, department of operative dentistry, faculty of dentistry, babol university of medical sciences, babol-iran. hoda amiri mahdiye pakdaman ali bijani social determinants of health research center, babol university of medical sciences, babol-iran.

introduction: discoloration of resin composites is a common reason for replacement of these restorations. the aim of this study was to eva-luate the influence of different light curing de-vices on color stability of a microhybrid resin composite. materials and methods: 80 disc-shaped speci-mens (8 mm in diameter, 2-mm height) were fabricated from filtek z250 resin composite. specimens were divid...

ژورنال: :مجله دانشکده دندانپزشکی اصفهان 0
مهرداد برکتین پروین میرزا کوچکی بروجنی بنفشه پدیدار mehrdad barekatain parvin mirzakouchaki borojeni banafsheh padidar

مقدمه: استحکام اتصال برشی یکی از خصوصیات مکانیکی بسیار مهم در دوام بالینی ترمیم های همرنگ دندان است. این خصوصیت رابطه مستقیمی با انقباض حین پلیمریزاسیون دارد. در حال حاضر چهار نوع منبع نوری جهت پلیمریزاسیون کامپوزیت رزین ها و انواع مختلف عوامل اتصال دهنده در اختیار دندان پزشکان می باشد. پژوهش حاضر کارایی دو دستگاه لایت کیور qth و led2 و دو نوع عامل اتصال دهنده excite و clearfil se bond را در اس...

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