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2.218 Aktuelle Fachpublikationen zum Thema temperature

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A Study on a Prepolymerization Process of Aromatic‐Contained Polyamide Copolymers PA(66‐co‐6T) via One‐Step Polycondensation

16.04.2015 | Cai‐Liang Zhang, Li Wan, Xue‐Ping Gu, Lian‐Fang Feng, Macromolecular Reaction Engineering, 2015

A facile one‐step polycondensation approach to prepare a prepolymer of aromatic‐contained polyamide using terephthalic acid (PTA), adipic acid (ADA), hexamethylenediamine (HMDA) as raw materials was explored systematically. The prepolymerization process was divided into four stages: formation ...

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Sensors, Vol. 15, Pages 8919-8930: Ultra-High Sensitivity Zinc Oxide Nanocombs for On-Chip Room Temperature Carbon Monoxide Sensing

16.04.2015 | Pan, Xiaofang ; Zhao, Xiaojin, Sensors, 2015

In this paper, we report an on-chip gas sensor based on novel zinc oxide (ZnO) nanocombs for carbon monoxide (CO) sensing. With ZnO gas sensing nanocombs fully integrated on a single silicon chip, the concept of low cost complementary-metal-oxide-semiconductor (CMOS) microsensor capable of ...

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A new cooling plus heating mode of liquid phase epitaxy and its application for the oriented film growth

15.04.2015 | L. S. Guo; Y. Y. Chen; X. Yao, CrystEngComm, 2015

Using liquid phase epitaxy (LPE), we developed a new approach to growing a-axis oriented YBa2Cu3O7−δ films (a-films) in air, which have been hard to gain in the prior art since an extremely low supersaturation (σ) is required for their formation. Instead of the conventional step-cooling from a ...

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Stable Nanoparticles Prepared by Heating Electrostatic Complexes of Whey Protein Isolate–Dextran Conjugate and Chondroitin Sulfate

15.04.2015 | Qingyuan Dai; Xiuling Zhu; Shabbar Abbas; Eric Karangwa; Xiaoming Zhang; Shuqin Xia; Biao Feng; Chengsheng Jia, Journal of Agricultural and Food Chemistry, 2015

A simple and green method was developed for preparing the stable biopolymer nanoparticles with pH and salt resistance. The method involved the macromolecular crowding Maillard process and heat-induced gelation process. The conjugates of whey protein isolate (WPI) and dextran were produced by ...

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Thermal versus Microwave Inactivation Kinetics of Lipase and Lipoxygenase from Wheat Germ

14.04.2015 | Bin Xu, Li Kun Wang, Wen Juan Miao, Qi Fei Wu, Yan Xia Liu, Yilin Sun, Chao Gao, Journal of Food Process Engineering, 2015

Abstract The inactivation kinetics of enzymes is an important way to reveal the mechanism of enzyme inactivation by microwaves. In this paper, lipase (LA) and lipoxygenase (LOX) were treated by both microwave irradiation and conventional heating. A temperature‐controlled water bath was used ...

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High Strength Chitosan Hydrogels with Biocompatibility via New Avenue Based on Constructing Nanofibrous Architecture

06.04.2015 | Jiangjiang Duan; Xichao Liang; Yan Cao; Sen Wang; Lina Zhang, Macromolecules, 2015

Breaking the limitation of traditional acid dissolving methods for chitosan by creating an alkali/urea hydrogen-bonded chitosan complex, a new solvent (4.5 wt % LiOH/7 wt % KOH/8 wt % urea aqueous solution) was used to successfully dissolve chitosan via the freezing–thawing process, for the first ...

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Room-Temperature Synthesis of Covellite Nanoplatelets with Broadly Tunable Localized Surface Plasmon Resonance

03.04.2015 | Maixian Liu; Xiaozheng Xue; Chayanjit Ghosh; Xin Liu; Yang Liu; Edward P. Furlani; Mark T. Swihart; Paras N. Prasad, Chemistry of Materials, 2015

Preparation of nanomaterials with controllable sizes and shapes at ambient conditions, without heating or cooling, is extremely attractive from the perspective of cost and energy efficiency. However, highly reactive precursors must be used to obtain NCs at ambient conditions, and this can make ...

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ChemInform Abstract: Thermoelectric Properties of the Quaternary Chalcogenides BaCu5.9STe6 and BaCu5.9SeTe6.

02.04.2015 | Mohamed Oudah, Katja M. Kleinke, Holger Kleinke, ChemInform, 2015

Abstract The title compounds are prepared from the elements by heating to 773 K within 24 h, followed by cooling to 673 K over 200 h and finally to room temperature.

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IJMS, Vol. 16, Pages 7520-7534: A New Series of Kinked Liquid Crystals: 2-(6-Alkoxynaphthalen-2-yl)-6-methoxyquinolines

02.04.2015 | Chia, Win-Long ; Liu, Chih-Wei, International Journal of Molecular Sciences, 2015

A new series of 2-(6-alkoxynaphthalen-2-yl)-6-methoxyquinolines (nO-NpQOMe, n = 3–8) liquid crystal compounds, a linear molecular structure with two kinks, were synthesized using a short two-step reaction with overall yields between 43% and 58%. Spectral analyses were in accord with the expected ...

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Effects of Shape and Size of Agar Gels on Heating Uniformity During Pulsed Microwave Treatment

01.04.2015 | Nohemí Soto‐Reyes, Ana L. Temis‐Pérez, Aurelio López‐Malo, Roberto Rojas‐Laguna, María Elena Sosa‐Morales, Journal of Food Science, 2015

Abstract Model gel systems with different shape (sphere, cylinder, and slab) and size (180 and 290g) were prepared with agar (5%) and sucrose (5%). Dielectric constant (ε′), loss factor (ε″), thermophysical properties, and temperature distribution of the model system were measured. Each agar ...

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