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5.907 Aktuelle Fachpublikationen zum Thema temperature

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Reaction Kinetics of Carbon Dioxide (CO2) Absorption in Sodium Salts of Taurine and Proline Using a Stopped‐Flow Technique

18.10.2014 | Ahmed Sodiq, Aravind V. Rayer, Akinola A. Olanrewaju, Mohammad R. M. Abu Zahra, International Journal of Chemical Kinetics, 2014

ABSTRACT The pseudo–first‐order reaction rate constants (k0, s−1) for the reaction of carbon dioxide in aqueous solutions of sodium taurate (NaTau) and sodium prolinate (NaPr) were measured using a stopped‐flow technique at a temperature range of 298–313 K. The solutions concentration varied ...

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Preparation, swelling properties, and displacement performance of functional amphiphilic microspheres

18.10.2014 | Peng Zhang, Yuanjun Dong, Wenzhang Huang, Zhenfu Jia, Chengyu Zhou, Maolei Guo, Haiyang Yu, Journal of Applied Polymer Science, 2014

ABSTRACT Because polymers containing benzyl chloromethyl groups are easily modified for functional production, the dispersion polymerization of acrylamide, 4‐vinylbenzyl chloride, and N,N‐methylene bisacrylamide in dimethylformamide initiated with α,α‐azobisisobutyronitrile was carried out to ...

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Preparation and evaluation of nonphosphate terpolymer as scale inhibitor and dispersant for Ca3(PO4)2, BaSO4, and Iron (III) hydroxide scales

18.10.2014 | Yunyun Bu, Yuming Zhou, Qingzhao Yao, Yiyi Chen, Wei Sun, Wendao Wu, Journal of Applied Polymer Science, 2014

ABSTRACT The polymeric scale inhibition and dispersion agents (PAYS) were prepared by graft copolymerization of acrylic acid, allylpolyethoxy carboxylate (APEY) and 2‐acrylamido‐2‐methyl‐propanesulfonic acid by using ammonium persulfate as a radical initiator in aqueous solution, among which ...

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Analysis of the transformation behaviors of a Chinese coal ash using in‐/ex‐situ XRD and SEM‐EXD

17.10.2014 | Xiongchao Lin, Caihong Wang, Jin Miyawaki, Yonggang Wang, Seongho Yoon, Isao Mochida, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT Crystal and phase transitions of a Chinese Datong coal ash were evaluated using room temperature X‐ray diffraction (RT‐XRD), in‐situ high temperature (HT)‐XRD, and scanning electron microscope combining energy dispersive X‐ray analysis (SEM‐EDX) as temperature varied from 300 °C to ...

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Numerical Study of the Formation of Soot Precursors during Low-Temperature Combustion of a n-Butanol–Diesel Blend

17.10.2014 | Xiaorong Zhou; Mengtian Song; Haozhong Huang; Ruzhi Yang; Mingxia Wang; Jiaxing Sheng, Energy & Fuels, 2014

To study the soot precursor emission characteristics of a n-butanol–diesel blend during low-temperature combustion (LTC), a model of n-heptane, n-butanol, polycyclic aromatic hydrocarbons (PAHs), and toluene was chosen. Computational fluid dynamics (CFD) software was used to establish a ...

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Stabilization of Homoserine-O-Succinyltransferase (MetA) Decreases the Frequency of Persisters in Escherichia coli under Stressful Conditions

17.10.2014 | Elena A. Mordukhova et al., PLoS ONE, 2014

by Elena A. Mordukhova, Jae-Gu Pan Bacterial persisters are a small subpopulation of cells that exhibit multi-drug tolerance without genetic changes. Generally, persistence is associated with a dormant state in which the microbial cells are metabolically inactive. The bacterial response to ...

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The Curious Case of Mesityl Azide and Its Reactivity with bpyNiEt2

17.10.2014 | Brooke M. Otten; Travis M. Figg; Thomas R. Cundari, Inorganic Chemistry, 2014

A DFT analysis of the reaction of bpyNiEt2 with ArN3 was performed for para-tolyl-azide (Ar = pTol), 3,5-dimethyl-phenyl-azide (Ar = mXy) and ortho-tolyl-azide (Ar = oTol), and mesityl-azide (MesN3). Of particular interest were the different products obtained for the latter (ethylene, butane, ...

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Unexpected Fluorescence of Polyols and PEGylated Nanoparticles Derived from Carbon Dot Formation

16.10.2014 | Hailong Dong, Marcus Roming, Claus Feldmann, Particle & Particle Systems Characterization, 2014

Synthesis of nanoparticles in high‐boiling alcohols (so‐called polyol synthesis) and surface functionalization of nanoparticles with polyethylene glycol (so‐called PEGylation) in combination with certain heating are often accompanied with an intense fluorescence in the blue to green spectral ...

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Enzymatically Interestrified Fats Based On Mutton Tallow And Walnut Oil Suitable For Cosmetic Emulsions

16.10.2014 | M Kowalska, M Mendrycka, A Zbikowska, S Stawarz, International Journal of Cosmetic Science, 2014

Summary Objective Formation of emulsion systems based on interesterified fats was the objective of the study. Enzymatic interesterification was carried out between enzymatic mutton tallow and walnut oil in the proportions 2:3 (wt/wt) to produce fats not available in nature. At the beginning ...

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Stereoblock-like Brush Copolymers Consisting of Poly(l-lactide) and Poly(d-lactide) Side Chains along Poly(norbornene) Backbone: Synthesis, Stereocomplex Formation, and Structure–Property Relationship

16.10.2014 | Takuya Isono; Yohei Kondo; Shun Ozawa; Yougen Chen; Ryosuke Sakai; Shin-ichiro Sato; Kenji Tajima; Toyoji Kakuchi; T ..., Macromolecules, 2014

Random and block copolymerizations of poly(l-lactide) (PLLA) and poly(d-lactide) (PDLA) macromonomers having an exo-norbornene group at the α- or ω-chain end (D/L ratio = 1/1, Mn = ca. 5000 g mol–1) were performed via ring-opening metathesis polymerization to produce the brush random and block ...

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