نتایج جستجو برای: bisphenol a
تعداد نتایج: 13431975 فیلتر نتایج به سال:
Sphingobium fuliginis OMI is a bacterium that can degrade a variety of recalcitrant alkylphenols and bisphenols. This study reports the draft genome sequence of S. fuliginis OMI.
Thermosensitive molecularly imprinted polymers (T-MIPs) on porous carriers were prepared via the synergy of dual functional monomers of 4-vinylpyridine (VP) and N-isopropylacrylamide (NIPAM), for selective recognition and controlled adsorption and release of bisphenol A (BPA) by the temperature regulation. The porous polymer supporter was synthesized by multistep swelling of polystyrene and the...
The syntheses and X-ray structures of three methylated bisphenol F derivatives and one respective analogue are reported. A special emphasis lies on the influence of methyl groups on the conformation of the common diphenylmethane scaffold. The introduction of four methyl groups to bisphenol F was found not to disturb its typical strong hydrogen bond network, and yet, to change the pattern of the...
Bisphenol-S (BPS) is a new bisphenol-A substitute widely used in many plastic products. Bisphenol-A as a main member of bisphenol family has been known as an endocrine system disrupter chemical compound. Like other members of bisphenol family, there is public health concern about the toxic effects of BPS on reproductive system, thus, we examined BPS effects on in vitro fertilization (I...
هدف: هدف از این مطالعه بررسی نقش بازدارندگی ویتامین e (ve) بر شاخص های اسپرماتوژنز رت ها به دنبال تیمار با bisphenol a بود. مواد و روش ها: رت های نر بالغ نژاد ویستار با میانگین وزنی10±231 گرم بهطور تصادفی به 4 گروه (6=n): کنترل، bpa (mg/kg/day250)، ve (mg/kg/day150) و bpa+ ve تقسیم شد. تیمار دهانی تا 56 روز و سه بار در هفته انجام گرفت. در پایان دوره تیمار، موش ها کشته شد و بیضه چپ آن ها توزی...
Background and purpose: Bisphenol A is a synthetic xenoestrogen that is used in large amount to produce polymers (polycarbonates, epoxy resins). It easily cross the blood-brain barrier and is reported to influence the central nervous system especially neurogenesis and synaptic transmission. In this research the effects of chronic administration of bisphenol A on spatial learning and memory in a...
In this work, the dynamics of the primary and the Johari-Goldstein (JG) processes are studied with dielectric spectroscopy. We found the relaxations at glass transition temperature in polyphenylglycidylether and diglycidyl ether of bisphenol-A to be strongly correlated over a wide temperature T and pressure P range. Analysing the temperature and pressure behaviour of the and (JG) -processes...
BACKGROUND Bisphenol A (BPA) is a high-production-volume chemical associated with a wide range of health outcomes in animal and human studies. BPA is used as a developer in thermal paper products, including cash register receipt paper; however, little is known about exposure of cashiers to BPA and alternative compounds in receipt paper. OBJECTIVE We determined whether handling receipt paper r...
Heat of polymerization of Bis-GMA-TEDMA monomer mixtures, corresponding to the conceivable constituents of composite resins, was evaluated from the area of exothermic peak in DSC curves, and also the conversions of polymerization were calculated from the ratio of the heat of polymerization for each monomer mixture to an assumed one at 100% conversion. The effects of composition of monomers and ...
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