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3.741 Aktuelle Fachpublikationen zum Thema temperature

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Recognition of human telomeric G‐quadruplex DNA by berberine analogs: effect of substitution at the 9 and 13 positions of the isoquinoline moiety

03.07.2015 | Debipreeta Bhowmik, Gaetano Fiorillo, Paolo Lombardi, G. Suresh Kumar, Journal of Molecular Recognition, 2015

G‐quadruplex forming sequences are widely distributed in human genome and serve as novel targets for regulating gene expression and chromosomal maintenance. They offer unique targets for anticancer drug development. Here, the interaction of berberine (BC) and two of its analogs bearing ...

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Synthesis and properties of cross‐linked polymers from epoxidized rubber seed oil and triethylenetetramine

03.07.2015 | Muhammad Yusuf Abduh, Muhammad Iqbal, Francesco Picchioni, Robert Manurung, Hero J. Heeres, Journal of Applied Polymer Science, 2015

ABSTRACT A series of epoxidized oils were prepared from rubber seed, soybean, jatropha, palm, and coconut oils. The epoxy content varied from 0.03 to 7.4 wt %, in accordance with the degree of unsaturation of the oils (lowest for coconut, highest for rubber seed oil). Bulk ...

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A high temperature polymer of phthalonitrile‐substituted phosphazene with low melting point and good thermal stability

03.07.2015 | Fenghua Zhao, Ruojin Liu, Xiaoyan Yu, Kimiyoshi Naito, Xiongwei Qu, Qingxin Zhang, Journal of Applied Polymer Science, 2015

ABSTRACT A phthalonitrile‐substituted phosphonitrilic monomer has been synthesized from phosphonitrilic chloride trimer and then polymerized with addition of 4‐(hydroxylphenoxy)phthalonitrile (HPPN). The chemical structures of the phosphonitrilic monomer and polymer were characterized by ...

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Chemical and bonding effects of exposing uncured PBI‐NBR insulation to ambient conditions

03.07.2015 | Shawn Parry, Justin Pancoast, Scott Mildenhall, Journal of Applied Polymer Science, 2015

ABSTRACT Uncured Polybenzimidazole‐Nitrile Butadiene Rubber (PBI‐NBR) insulation experiences altered chemical and bonding phenomena if exposed to ambient conditions while in a sheet‐stock configuration. Multiple lots of a PBI‐NBR formulation exposed to ambient and slightly elevated temperature ...

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Effects of the electron‐beam absorption dose on the glass transition, thermal expansion, dynamic mechanical properties, and water uptake of polycardanol containing epoxy groups cured by an electron beam

30.06.2015 | Jinsil Cheon, Donghwan Cho, Journal of Applied Polymer Science, 2015

ABSTRACT In this study, the glass transition, thermal expansion, dynamic mechanical properties, and water‐uptake behaviors of diepoxidized polycardanol (DEPC) cured by electron‐beam radiation in the presence of cationic photoinitiators were investigated. How the type and concentration of ...

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Overtone and combination features of G and D peaks in resonance Raman spectroscopy of the C78H26 polycyclic aromatic hydrocarbon

26.06.2015 | A. Maghsoumi, L. Brambilla, C. Castiglioni, K. Müllen, M. Tommasini, Journal of Raman Spectroscopy, 2015

We have studied the Raman spectra of C78H26, a polycyclic aromatic hydrocarbon with D2h symmetry point group resembling a longitudinally confined graphene ribbon (or a graphene island) with armchair edge. The experimental spectra recorded with several excitation laser lines have been compared ...

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A facile method to synthesize high‐molecular‐weight biobased polyesters from 2,5‐furandicarboxylic acid and long‐chain diols

26.06.2015 | Vasilios Tsanaktsis, George Z. Papageorgiou, Dimitrios N. Bikiaris, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT In this study, biobased furan dicarboxylate polyesters have been prepared using 2,5‐furandicarboxylic acid (FDCA) and diols with high number of methylene groups (long‐chain diols), namely, 8, 9, 10, and 12. Because of the high boiling points of these diols, a modified procedure of the ...

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Substituent effect of N‐aryl‐N′‐pyridyl ureas as thermal latent initiators on ring‐opening polymerization of epoxide

26.06.2015 | Naoyuki Makiuchi, Atsushi Sudo, Takeshi Endo, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT A series of N‐aryl‐N′‐pyridyl ureas were synthesized by the reactions of 4‐aminopyridine (4AP) with the corresponding isocyanates such as phenyl isocyanate, 4‐methylphenyl isocyanate, 4‐methoxyphenyl isocyanate, 4‐chlorophenyl isocyanate, 4‐(trifluoromethyl)phenyl isocyanate, and ...

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Thermo‐ and pH‐sensitive triblock copolymers with tunable hydrophilic/hydrophobic properties

26.06.2015 | Christophe Pottier, Gaëlle Morandi, Virginie Dulong, Zied Souguir, Luc Picton, Didier Le Cerf, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT Polymers consisting of poly(acrylic acid) (PAA) and statistical poly[(acrylic acid)‐co‐(tert‐butylacrylate)] (P(AA‐co‐tBA)), attached to both extremities of Jeffamine® (D series based on a poly(propylene oxide) (PPO) with one amine function at each end) using atom transfer radical ...

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Computational study on the interactions of mustard gas with cucurbituril macrocycles

26.06.2015 | Natarajan Sathiyamoorthy Venkataramanan, Ambigapathy Suvitha, Hiroshi Mizuseki, Yoshiyuki Kawazoe, International Journal of Quantum Chemistry, 2015

The study on the absorption of toxic gases such as mustard gas by organic host is essential to the development of inexpensive detection and decontamination equipments. Using quantum chemical methods, we propose cucurbituril as an effective host to capture mustard gas. It was found that stable ...

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