نتایج جستجو برای: nano microfibers

تعداد نتایج: 51207  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی 1390

فرآیند ماشینکاری به روش تخلیه الکتریکی( edm)، یکی از فرآیندهای نوین ماشینکاری است که کاربردهای متنوعی در ساخت و تولید محصولات میکرومتری دارد. رشد و توسعه نانوتکنولوژی و نیاز به بهره گیری از روشهای جدید موجب شده است که جذبه زیادی برای استفاده از فرآیند edm در ساخت و تولید محصولات نانومتری ایجاد شود. فرآیند nano-edm یک فرآیند ماشینکاری حرارتی است که در آن از انرژی حرارتی حاصل از جرقه الکتریکی برا...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان همدان - دانشکده ادبیات و علوم انسانی 1390

abstract this study is an attempt to determine the effect of nano- technology education on science lesson for fifth grade in primary school in the city of kermanshah. this research is experimental and is conducted in the from of pre-test and post- test for the control group. an achievement test was administered to determine the rate of learning in the students. the research is an applied one. ...

Journal: :Advanced materials 2010
Xinyong Tao Lixin Dong Xinnan Wang Wenkui Zhang Bradley J Nelson Xiaodong Li

Nanocomposites, where nanoscale inclusions are embedded in a matrix material, have attracted increasing research attention in recent years. Here, we limit our focus to polymer nanocomposites. Nano-reinforcements (for instance, nanoparticles, nanowires, and nanotubes) have largely disappointed us in manufacturing lightweight, high-strength, and high-toughness polymer composites because of their ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم کشاورزی 1393

در این مطالعه، فرمولاسیون¬های نانوی نور تخریب¬پذیر و زیست¬سازگار ایمیداکلوپرید و ایندوکساکارب، به واسطه¬ی کپسوله کردن مستقیم هر کدام ازآنها با کوپلیمرهای خطی- دندریتیک پلی¬سیتریک¬اسید-پلی¬اتیلن¬گلیکول-پلی¬سیتریک¬اسید (pca-peg-pca) تهیه شدند. سنتز این نانوآفت¬کش¬ها به دو صورت بدون کاربرد نانوذرات tio2 (nano-ind و nano-imi) و با کاربرد نانوذرات tio2 (nano-ind/tio2 و nano-imi/tio2) انجام شد. فرمول...

Journal: :Chemical Industry & Chemical Engineering Quarterly 2022

A multidisciplinary approach based on experiments and mathematical modeling was used in biomimetic system development for three-dimensional (3D) cultures of cancer cells. Specifically, two cell lines, human embryonic teratocarcinoma NT2/D1 rat glioma C6, were immobilized alginate microbeads microfibers, respectively, cultured under static flow conditions perfusion bioreactors. At the same time,...

2015
Tao Sun Qiang Huang Qing Shi Huaping Wang Xiaoming Liu Minoru Seki Masahiro Nakajima Toshio Fukuda

microchannels. Interestingly, this impulse can achieve to temporarily cease the spinning process. Moreover, an optimized magnetic assembly is achieved by considering both the assembling area on a ring magnet and the MNPs concentration in microfibers. After the test of cell survival, a high cell viability of 97.2 % can be confirmed in assembled structures, which indicates that our method allows ...

2003

pdates on yarn dyeing technology U were shared among the 83 participants in the AATCC symposium held at Southern Pines, N. C., in April. The symposium included 11 presentations, problem solving sessions and a discussion session on the challenges of package dyeing microfibers. Developed by AATCC‘s Committee on Yarn Dyeing Technology, the two-day program offered registrants ampleopportunity to co...

2011
Zhimin Lu Xiaoming Qian

Splitting spunlaid composite filament is a most significant technique to manufacture nonwoven with microfibers. The splitting effect of composite filament is a direct impact on the performance of the final products. The paper summarizes present methods of splitting composite fibers at home or abroad, and the principle and characteristic of each method is also described in order to discuss the m...

Journal: :Optics express 2009
Haifeng Xuan Wei Jin Min Zhang

Long period gratings (LPGs) are fabricated by use of focused high frequency CO(2) laser pulses to periodically modify the transverse dimension of silica microfibers. A 20-period LPG with a 27 dB attenuation dip is realized in a microfiber with a diameter of approximately 6.3 microm. The resonant wavelength has a negative temperature coefficient and a high sensitivity to external refractive inde...

2010
D. Farrar M. S. Yu J. E. West W. Moon

258 is one where the piezoactivity and mechanical properties can be altered individually so that the mechanical stiffness of the material can be controlled for particular applications or tuned to match that of the surroundings (e.g., air or water) for increased transduction sensitivity. Here, we present a new piezoelectric material based on a helical biopolymer with an inherently large electric...

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