نتایج جستجو برای: storage modulus and loss modulus of samples increased by chemical modification

تعداد نتایج: 24389347  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تحصیلات تکمیلی علوم پایه زنجان - دانشکده شیمی 1391

in this thesis a calibration transfer method is used to achieve bilinearity for augmented first order kinetic data. first, the proposed method is investigated using simulated data and next the concept is applied to experimental data. the experimental data consists of spectroscopic monitoring of the first order degradation reaction of carbaryl. this component is used for control of pests in frui...

پایان نامه :0 1375

investigation the archetype of mother can help the reader to understand poes works, especially his fiction, better, if not fully. motivated by internal and external drives to get into the universe in its manifold form poe was impelled to art and, from various modes of art, to symbolism. how much was poe successful to produce works of art has been a matter of dispute among critics. however, ther...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - پژوهشکده ادبیات 1391

the major purpose of this study was to develop the translation teacher competency test (ttct) and examine its construct and predictive validity. the present study was conducted in two phases: a qualitative phase as well as a quantitative phase. in the first phase of the study, the author attempted to find out the major areas of competency required for an academic translation teacher. the second...

Journal: Polyolefins Journal 2016

A novel mixing approach for achieving a good dispersion of multi-walled carbon nanotubes (MWCNTs) in ethylene- propylene diene monomer (EPDM) matrix has been investigated. In this approach EPDM was modified with vinyltrimethoxysilane (VTMS) during melt mixing. In addition the effect of MWCNT concentration on mechanical and rheological properties of modified EPDM has been studied. The formulated...

2010
Constantine Y. Khripin C. Jeffrey Brinker Bryan Kaehr

Recent work has demonstrated the feasibility of employing three dimensional (3D) protein hydrogels, fabricated using multiphoton-induced photochemistry, as chemically responsive microactuators in ‘‘lab on a chip’’ devices. In addition, these materials show great promise as cell capture/incubation devices, allowing single bacterial cells to reproduce into multicellular constructs with ‘‘user-def...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1393

the purpose of the present study was to investigate the relationship between fear of negative evaluation (fne) and communication strategies (css) among iranian efl learners. it was aimed to examine the differences in the use of communication strategies between speakers with high or low degree of fear of negative evaluation. the current study was a case study consisting of 10 english learners at...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1391

this thesis seeks to present a critical reading of virginia woolf’s mrs. dalloway and michael cunningham’s the hours in terms of an intertextual approach, concentrating on dialogic imagination, negativity, transposition and allusion. this study attempts to evaluate cunninghams perception of woolfs life and work by adopting kristevas conception of intertextuality and her consideration of the hou...

Journal: :تحقیقات مهندسی کشاورزی 0
معصومه علی بابا دانشجوی کارشناسی ارشد احمد غضنفری مقدم دانشیار گروه مکانیک ماشین های کشاورزی دانشگاه شهید باهنر کرمان علی رجبی پور دانشیار گروه مهندسی و فناوری دانشکده پردیس کشاورزی و منابع طبیعی دانشگاه تهران

after harvesting, pistachio nuts are generally kept in storage before being exported. during handling, thenuts are exposed to external forces that cause mechanical damage to them. the increase of the mechanicaldamage is a function of storage conditions, especially temperature. this research investigated the effect ofstorage temperature (25, 5, -5, -15°c), on the mechanical properties of pistach...

2001
V. M. KAMATH M. R. MACKLEY

In this paper we describe two numerical methods by which the relaxation modulus and memory function of a polymer can be determined from a set of discrete linear viscoelastic storage and loss moduli measurements. The first method involves expressing the linear viscoelastic data by means of a rational function (with certain constraints) and then taking the Laplace transform of that function. The ...

Journal: :Journal of Renewable Materials 2022

In this study, Pinus massoniana Lamb at different heights, across the annual rings, and between earlywood latewood was measured by X-ray diffraction chemical composition analyzed treatment. Results indicated that microfibril angle (MFA) decreased changed little with increase in height from 1 m to 9 m. radial direction, MFA an rings. The cellulose content of higher than earlywood. viscoelastic c...

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