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Abstract  

An intelligent hydrogel with both pH and temperature sensitivity was obtained by grafting acrylic acid and dimethylaminoethylmethacrylate onto preirradiated polypropylene (PP) film by two-step reactions. The effect of first and second reactions on the degree of grafting was studied. The grafted sample films were checked by Fourier transform infrared spectrophotometry in the attenuated total reflectance mode. The morphology of the PP samples was observed by scanning electron microscope in different conditions before and after grafting, respectively.

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Abstract  

Two-step grafting reaction of acrylamide (AAm) and acrylic acid (AAc) onto preirradiated polyethylene (PE) film were performed. The effects of irradiation dose, reaction temperature and reaction time on the grafting yield were studied. The effect of reaction time of the first step grafting on the yield of the second step grafting was also evaluated. The original and the irradiated PE films were tested by Fourier transform infrared (FTIR) spectroscopy in the attenuated total reflectance mode (ATR). The AAm and AAc grafted PE film appeared thermo- and pH-sensitive which are similar to the interpenetrating polymer network hydrogel.

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studied by Heller-Kallai et al. [ 8 ]. During the combustion the organically bonded sulfur released during the pyrolysis reacts with oxygen from the fluidizing air and with free lime (CaO) resulting from the decarbonation of calcite to form anhydrite (CaSO

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://www.sustainablesettlement.co.za/event/SBE2004/papers/SB014.pdf (last visited 5 October 5 2010 Ronchetti P. The barriers to the mainstreaming of lime-hemp: A systemic approach, MSc Dissertation , Dublin Institute of Technology, School of Spatial Planning

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Acta Chromatographica
Authors: Liyi Li, Liming Hu, Bingbao Chen, Yanwen Dong, Zixia Lin, Zhiyi Wang, Congcong Wen, Xianqin Wang, and Shuanghu Wang

In this study, we developed a urine metabolomic method by gas chromatography–mass spectrometry (GC–MS) combination with biomedical results to evaluate the effect of activated carbon on methomyl poisoning rats. The rats were divided into four groups, methomyl group, two activated carbon treatment group, and control group. According to the biochemical results, it indicated that activated carbon treated rats could cause liver and kidney function changes. According to the urine metabolomics results, activated carbon treatment group (10 min) and activated carbon treatment group (30 min) could be distinguished from methomyl group, and activated carbon treatment group (10 min) could be separated from activated carbon treatment group (30 min) rats, which indicated that the treatment of rats by activated carbon in different time had a different effect. The results indicate that metabolomic method by GC–MS may be useful to elucidate activated carbon treated on methomyl poisoning rats.

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and Romans built structures that survive today that took advantage of the pozzolan–lime reaction so the use of pozzolanic materials in the construction industry has been a common practice for many years. The materials with the best pozzolanic

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. Kuzsinszky B. 1932 A gázgyári római fazekastelep Aquincumban (Das große römische Töpferviertel in Aquincum). BudRég XI, 5–384. Lőrincz, B. 1977 Pannonische Stempelziegel I.: Limes-Strecke Annamatia–Ad Statuas. DissArch II, 5

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. , 1999 . Influence of dolomitic lime on DOC and DON leaching in a forest soil . Biogeochemistry. 47 . 297 – 317 . Andersson , S. , Valeur , I

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Acta Chromatographica
Authors: Yonghui Shen, Deru Meng, Feifei Chen, Hui Jiang, Liming Hu, Yunfang Zhou, and Miaomiao Zhang

Abstract

Sarecycline is a narrow-spectrum antibiotic for the treatment of acne, which is a chronic inflammatory disease of the hair follicle sebaceous glands. In the study, UPLC-MS/MS was used to establish a rapid and accurate analytical method. The sarecycline was determined with poziotinib as internal standard (IS) in rat plasma. An ACQUITY UPLC HSS T3 column (2.1 × 100 mm, 1.8 μm) could performe chromatographic separation with the mobile phase (methanol: water of 0.1% formic acid) with gradient elution. The ions of target fragment were m/z 488.19→410.14 for sarecycline and m/z 492.06→354.55 for poziotinib, which could quantify the electrospray ionization of positive multiple reaction monitoring (MRM) mode. The linear calibration curve of the concentration range was 1–1,000 ng/mL for sarecycline with a lower limit of quantification (LLOQ) of 1 ng/mL. The mean recovery was between 82.46 and 95.85% for sarecycline and poziotinib in rat plasma. RSD for precision of inter-day and intra-day were between 3.24 and 13.36%, and the accuracy ranged from 105.26 to 109.75%. The developed and validated method was perfectly used in the pharmacokinetic study and bioavailability of sarecycline after intravenous and oral administration in rats.

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. Among the three types of expansive cements classified the ASTM C845-04 standard [ 8 ] the high-calcium aluminate cement based one was the subject of our previous studies [ 9 , 10 ]. Our efforts focused previously on the synthesis of anhydrite–lime

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