家具绿色设计中的原材料选择

在国际上一致倡导注重资源和原材料再生利用的呼声中,按“绿色造材”概念设计家具,改变人们现有审美观念,使自然能源利用和审美景观的创造都达到新的高度。在这种设计创新氛围中,现代家具设计应在环境型原材料和绿色科学技术方面多加创新和运用,使绿色生态成为一种新的生活追求。就家具原材料而言,定义了“绿色”原材料的概念,描述了生态原材料的现状以及发展前景,指出了“绿色”设计中原材料的选择对最终家具“绿色程度”具有重要意义。     

Physicochemical,Antioxidant, In Vitro Release,and Heat Sealing Properties of Fish Gelatin Films Incorporated with β-Cyclodextrin/Curcumin Complexes for Apple Juice Preservation

The antioxidant activity of gelatin film is poor. Curcumin is a natural antioxidant, but its main disadvantage is low aqueous solubility. In this study, curcumin was encapsulated by β-cyclodextrin to prepare βCD/CUR complex. Gelatin films incorporated with βCD/CUR complexes (GL-βCD-CUR films) were fabricated. The effects of curcumin content on their properties were investigated. Results showed that the water solubility of curcumin was improved in βCD/CUR complex. The βCD/CUR complex containing 2.5 mg curcumin had smaller size and more homogeneous distribution. The thicknesses of all films were about 87 μm and there were no significant differences (p > 0.05). The optimal tensile strength (TS) and elongation at break (EAB) of GL-βCD-CUR films were observed at the curcumin content of 2.5 mg. With the increase of curcumin concentration, water vapor permeability (WVP) of gelatin-based films decreased from 2.88 to 2.38 × 10^?10 g m^?1 Pa^?1 s^?1 and water content (WC) decreased from 34.64 to 24.72%, but water solubility (WS) increased from 21.22 to 59.75%. GL-βCD-CUR films exhibited lower light transmission in UV light compared with GL-βCD film. SEM provided that there was a good compatibility between gelatin molecules and βCD/CUR complexes. FTIR proved that no functional groups appeared or disappeared. A significant increase in antioxidant activity and the stability of this activity along with a lower release rate of curcumin in food simulant were observed in gelatin films incorporated with βCD/CUR complexes. The heat sealing property of GL-βCD-CUR films containing 1 or 2.5 mg curcumin was better than that of film containing 5 mg curcumin. The L values of red Fuji (Malus pumila mill) apple juice packed by GL-βCD-CUR films reduced slowly. The slowest decline in total polyphenol content was found in GL-βCD-2.5CUR group. Our results indicated that the incorporation of βCD/CUR complex significantly enhanced the antioxidant activity of gelatin film, and the GL-βCD-CUR film can be used in apple juice preservation.     

酶解泥鳅蛋白制备小分子肽的工艺研究

以泥鳅为原料,酶解泥鳅蛋白制备小分子肽。运用响应面分析法优化泥鳅蛋白酶解的工艺条件,探讨了泥鳅蛋白酶解过程中液料比、酶解温度、酶解时间对多肽得率的影响。结果表明,泥鳅蛋白酶解的工艺条件为:液料比1.3、酶解温度57℃、时间9.42h,肽的得率为36.3%(模型预测值为36.37%)。通过OriginPro7.0软件计算,在显著性水平P>0.05下,预测值与实际值无显著不同,表明运用响应面分析法优化泥鳅蛋白酶解工艺条件是可行的。     

苏子油多不饱和脂肪酸尿素富集研究

采用尿素富集法，使苏子油中多不饱和脂肪酸的含量由原来的７６．９％提高到９９．９％，亚麻酸含量由６４．７％提高到９０．９％。从而使脂肪酸的质量有了进一步的提高。     

阳离子木薯淀粉和马铃薯淀粉对PCC加填的TMP浆的影响

在用过氧化氢漂白热磨机械浆（TMP）抄造的高附加值印刷用纸的生产中,增加沉淀碳酸钙（PCC）的用量就需要使用阳离子淀粉作为增强剂。然而,淀粉在机械浆悬浮液中需要小心使用,因为在制浆过程中产生的溶解和胶体物质能与淀粉中和。本研究比较了相同取代度的阳离子木薯淀粉和阳离子马铃薯淀粉对TMP纤维的影响,在TMP中添加了用量25％的PCC。结果表明,在阴离子垃圾较多的环境下,与高取代度马铃薯淀粉相比,高取代度木薯淀粉是一种更有效的增强剂和助留剂。     

一种预测速生桉木常规KP法纸浆卡伯值的新模型

研究了蒸煮温度、时间、H-因子、消耗碱的量和初始硫化度与蒸煮终点浆料卡伯值之间的关系.结果发现,卡伯值与H-因子的倒数成线性关系;与消耗的碱量平方的倒数成线性关系;与硫化物和残余碱含量之和的倒数同样成线性关系,并得出了卡伯值预测的数学经验方程,即:K=A+B/{H[(CAA-0.5S·CAA)-(0.5S·CAA+CREA)]2}.验证结果表明,该模型可以对速生桉木常规KP法蒸煮终点浆料卡伯值进行准确预测,其线性相关系数R2=0.9152.     

波谱图在判断机械故障中的应用体会

分析了利用波谱图判断机械故障问题的几种方法,指出机械波形成的原因十分复杂,涉及 的机构、零件、部件很多,要快速准确地判断特殊和疑难的机械波,除了要善于积累经验,熟悉常见机械波长、波形及不匀率曲线的形态外,还应通过实践摸索掌握隐波、谐波、假波及周期波等特殊机械波的分析方法,从而达到有效控制成纱条干质量的目的。     

浅谈数码印花技术在服装设计中的应用

文章对数码印花技术的特点及优势进行了介绍,详细分析了其在服装设计中的应用,并探讨了数码印花技术在服装领域的应用前景。     

PPS针刺过滤毡常温下拉伸特点研究

结合PPS基布和PTFE基布的经、纬向拉伸性能及其经、纬纱拉伸性能的测试结果,研究分析了PPS基布针刺过滤毡与PTFE基布针刺过滤毡经、纬向所表现的不同拉伸特性。建议针对清灰机理,对除尘滤料的经向、纬向结构进行优化设计。     

环境工程中大气污染危害与治理方案的解读

当前,随着我国社会工业化水平的不断提升,工业化企业在市场中得到了快速的发展.但是,由于工业化企业在生产的过程中,产生了大量的污染气体,严重破坏了我国大气环境质量,导致我国大气环境污染问题越加的严重,许多大城市中经常会出现雾霾等环境问题,严重影响到了人们的生活质量,甚至对社会的稳定发展也造成了严重的影响.大气污染问题对人...