نتایج جستجو برای: room temperature curing

تعداد نتایج: 519378  

2012
Piyush S. Jain A. A. Shaikh

In this paper, mechanical behavior of polyester with varying parameters of curing were investigated. Binder content, accelerator content, temperature and time were ascertained as parameters during curing of polyester specimens. Three levels of each parameter were selected and taguchi techniques are implemented. It was observed that curing time and binder content influenced mechanical properties...

Journal: :Plant physiology 1943
P H Heinze C O Appleman

If sweet potatoes are to be stored for any leilgth of time they must be subjected immediately after digging to a suitable combination of temperature and humidity for effective curing of the roots. The physiology of curing is imperfectly understood because of our limited information of the essential chemical changes in the roots during curing,. Previous studies have been confined chiefly to carb...

2014
G. Li X. L. Li R. R. Wei J. M. Du X. S. Wu Mohamed Heikal

Three concrete mix proportions were designed and prepared, respectively, such as fly ash concrete (abbreviated as “FAC”) with 30% fly ash replacement ratio of cement, fly ash, and slag concrete (abbreviated as “FSC”) with each of 20% fly ash and slag replacement ratio and ordinary Portland cement concrete (abbreviated as “OPC”) for the research of carbonation and chloride resistance of concrete...

Journal: :journal of sciences, islamic republic of iran 2015
e. rezaee nezhad s. karimian s. sajjadifar

the magnetically recoverable fe3o4 nanoparticle and the supported brønsted acidic ionic liquid 1-methyl-3-(3-trimethoxysilylpropyl) imidazolium hydrogen sulfate (fe3o4-il-hso4) were synthesized and used as efficient magnetic catalysts for the regioselective thiocyanation of aromatic and heteroaromatic compounds at room temperature in water: ethanol. this procedure provided the target thiocyanat...

Journal: :international journal of nanoscience and nanotechnology 2011
v. taghvaei a. habibi-yangjeh m. behboudnia

simple, low temperature and environmentally benign green route is proposed for preparation of nanocrystalline zno in presence of a low-cost and halide-free room-temperature ionic liquid (rtil) by refluxing at 95 °c for 60 minutes. the x-ray diffraction (xrd) studies display that the products are well-crystallized in the form of wurtzite hexagonal. morphology of the as-prepared zno was character...

Journal: :Cement & Concrete Composites 2022

The acceleration impacts of calcium sulfoaluminate belite ferrite (CSABF)—a cement produced from industrial side streams—on the hydration and strength development Portland (PC) paste cured at ?5 °C with without pre-curing room temperature were investigated. eco-friendly CSABF content on setting time hardened properties pastes Freezing point amount freezable water (FW) decreased pre-curing. Hydr...

2016
Jia-De Lin Tsai-Yen Wang Ting-Shan Mo Shuan-Yu Huang Chia-Rong Lee

This work successfully develops a largely-gradient-pitched polymer-stabilized blue phase (PSBP) photonic bandgap (PBG) device with a wide-band spatial tunability in nearly entire visible region within a wide blue phase (BP) temperature range including room temperature. The device is fabricated based on the reverse diffusion of two injected BP-monomer mixtures with a low and a high chiral concen...

Epoxy coatings are usually reinforced by the use of nanofillers, but reactive nanofillers having physical tendency towards epoxide ring opening are preferable. In this work, nanosilica (SiO2) and halloysite nanotubes (HNTs) known for their hydroxyl-contained surface are used and their effects on the curing behavior of an epoxy/amine coating is compared. The spherical and tubular nano...

Journal: :Dental materials journal 2008
Ihsan Hubbezoglu Arife Dogan Orhan Murat Dogan Giray Bolayir Bulent Bek

The influence of three curing modes of a high-powered LED curing unit on temperature rise under 2-mm-thick dentin was investigated during the polymerization of resin composite samples of Admira, Filtek P60, Premise, Tetric Flow, Tetric Ceram, and Filtek Z250. Ninety standard specimens were prepared. The bonding agents and resin composites were cured with standard, pulse, or soft-start mode (n=5...

ژورنال: مجله دندانپزشکی 2005
حسنی طباطبایی, معصومه , میرزایی, منصوره , عطایی, محمد , متوسلیان, فریبا ,

Background and Aim: The majority of commercial curing units in dentistry are of halogen lamp type. The new polymerizing units such as blue LED are introduced in recent years. One of the important side effects of light curing is the temperature rise in composite resin polymerization which can affect the vitality of tooth pulp. The purpose of this study was to evaluate the temperature rise in two...

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