| 4 | Synthesis of Water-Soluble Chitosan From Squid Pens Waste for Capsule Shell Materials显示文摘Water-Soluble Chitosan(WSC)has been sucessfuly synthesized from squid pens waste.The synthesis of chitosan from chitin was carried out by optimization of deacetylation temperature and time.Chitin was obtained from squid pens waste by demineralization and deproteinization process.HCl 7%was used for demineralization and NaOH 10%at 60℃ was applied for deproteinization process.Deacetylation reaction was carried out at varied temperatures i.e.,60℃,70℃,80℃,90℃ and 100℃ in NaOH 50%solution for 10 hours.Deacetylation reaction time were varied for 2 hours,4 hours,6 hours,8 hours,and 10 hours.The crude chitosan obtained then reacted with H2O230%to depolymerize.The synthesis product obtained then characterized by FTIR.The result of squid chitin yield was 33.9%.The optimum temperature and time of chitosan deacetylation process were 90℃ for 8 hours as indicated by the value of deacetylation degree(DD)that equal to 83.94%at optimum temperature and 82.22%at optimum reaction time.The percentage of WSC yield at optimum temperature(90℃)and optimum time(8 hours)were 27.59%and 23.16%,respectively.WSC solubility test was done in water and HCl 0,1N.The solubility of 2.8325 mg/mL and 0.8125 mg/mL were obtained in acid medium and water medium,respectively. | Malinda Syifa Yusharani Stenley Harmami Ita Ulfin Suprapto Suprapto Yatim Lailun Ni’mah | 2019 | Journal of Renewable Materials2019，7，7： | 0 |
| 5 | 一场无暇他顾的LEXUS RS较量雷克萨斯全新RX显示文摘在奔驰、宝马、奥迪车型级别划分的夹缝中求生存似乎是德系之外的豪华品牌立足的根本,这样做的优势显而易见,既能避开级别完全对等车型间的针锋相对,又能以更具品牌特色的优势占得先机。借此法,日系及美系豪华品牌在中国市场取得的成功让人不得小觑。然而,雷克萨斯似乎有意打破这种平衡,凭借NX在入门级SUV领域的成功,全新RX可以放开拳脚,更具目的性地向德系大型豪华SUV展开攻势。 | Stenley | 2016 | 汽车导购2016，0，2： | 0 |
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