نتایج جستجو برای: polytrimethylene terephthalate

تعداد نتایج: 7290  

Journal: :Bioscience, biotechnology, and biochemistry 2004
Daisuke Sugimori Takanori Sekiguchi Fumihiko Hasumi Motoki Kubo Naoki Shirasaka Masaya Ikunaka

A screening study yielded Acinetobacter calcoaceticus strain 4-1-5, which is capable of hydroxylating indole to 7-hydroxyindole. Strain 4-1-5 grew on terephthalate as the sole source of carbon and energy and hydroxylated indole to 7-hydroxyindole by cometabolism of indole using terephthalate as cosubstrate. Strain 4-1-5 produced 0.574 mM of 7-hydroxyindole at 2.38 mM indole in 24 h with the cel...

2012
Meng Ting Han

In the title mol-ecular salt, 2C(6)H(11)NH(3) (+)·C(8)H(4)O(4) (2-), the terephthalate dianion is close to being planar (r.m.s. deviation = 0.049 Å). In the crystal, the cations and anions are linked by N-H⋯O hydrogen bonds into (010) sheets. Of the four terephthalate O atoms, two accept two hydrogen bonds each and two accept one hydrogen bond each.

2012
Yu Jin

The asymmetric unit of the title salt, 2C(2)H(8)NO(+)·C(8)H(4)O(4) (2-), comprises one crystallographically independent 2-hy-droxy-ethanaminium cation and one half terephthalate anion. In the crystal, hydrogen bonds involving the hy-droxy and ammonium groups of the cations and the carboxyl-ate O atoms of the terephthalate anions result in the formation of a three-dimensional network structure.

2008
Chang-Ge Zheng Jie Zhang Jian-Quan Hong Song Li

In the title compound, [Cu(C(8)F(4)O(4))(C(5)H(5)N)(3)](n), the Cu(II) atom, lying on a twofold rotation axis, is five-coordinated by two O atoms from two tetra-fluoro-terephthalate ligands and three N atoms from three pyridine ligands in a distorted trigonal-bipyramidal geometry. Adjacent Cu(II) atoms are connected via the bridging tetra-fluoro-terephthalate ligands into a one-dimensional chai...

Journal: :International journal of toxicology 2014
Lillian C Becker Wilma F Bergfeld Donald V Belsito Ronald A Hill Curtis D Klaassen Daniel C Liebler James G Marks Ronald C Shank Thomas J Slaga Paul W Snyder F Alan Andersen

The safety of 6 modified terephthalate polymers as cosmetic ingredients was assessed. These ingredients mostly function as exfoliants, bulking agents, hair fixatives, and viscosity-increasing agents-nonaqueous. Polyethylene terephthalate (PET) is used in leave-on products up to 100% and in rinse-off products up to 2%. The Cosmetic Ingredient Review Expert Panel (Panel) considered that the PET u...

2013
M. H. Vakili M. Haghshenas Fard

Chemical recycling of Polyethylene terephthalate, PET, wastage has been investigated in this study. The aim of this work is recovery of terephthalic acid and ethylene glycols from PET waste. This process has been done in two stages. At the first stage, reaction between PET waste and sodium hydroxide for production of ethylene glycol and sodium terephthalate solution carried out in a stainless s...

Journal: :Environmental Health Perspectives 1995
Y Z Wang Y Zhou G J Zylstra

Comamonas testosteroni YZW-D was isolated from Passaic River sediment for its ability to degrade isophthalate and terephthalate. Degradation of the two isomeric compounds proceeds via separately inducible catabolic pathways that converge at protocatechuate. Analysis of the catabolic pathways by which these two isomers are degraded demonstrated that a cis-dihydrodiol intermediate is involved in ...

2000
JUN XIAO XINHUA WAN DONG ZHANG QI-FENG ZHOU S. RICHARD TURNER

Copoly(ethylene terephthalate-imide)s (PETIs) were synthesized by the melt copolycondensation of bis(2-hydroxyethyl)terephthalate with a new imide monomer, N,N9-bis[p-(2-hydroxyethoxycarbonyl)phenyl]-biphenyl-3,39,4,49-tetracarboxydiimide (BHEI). The copolymers were characterized by intrinsic viscosity, Fourier transform infrared, H NMR, differential scanning calorimetry, and thermogravimetric ...

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