种子包衣剂的合成和性能研究

研究了种衣剂聚乙烯醇缩甲醛,脲醛树脂,丙烯酸－丙烯酚胺共聚物,柠檬酸－乙二醇聚酯,氧化淀粉等合成方法。测定了这些种衣剂的各种物理性能,干燥速度,成膜性,水溶性,溶胀率等。并经发芽试验评价了种衣剂对种子活力的影响。     

Effective of ZBS Additive on Coke Microstructure and Thermal Properties

A series of experiments were carried out on the coke sprayed with ZBS of Anyang and Kunming Iron & Steel Co.,Ltd on the reaction electrical furnace.The microstructure of coke before and after spraying with ZBS were investigated with SEM and HY-4 Automatic microdensitometer.Coke reaction index and coke strength reaction were investigated according to the GB/T4000-1996.The results are as follows:Compared to original coke sample,the pore space become relatively little and small,and the coke hole rate is reduced.The ZBS carbide with brilliant white rib formed around the gap,existed in the coke reacted 2 hours,and it can improve CSR.ZBS can obviously improve coke thermal properties.The worse coke thermal properties are,the bigger the margin improved by ZBS are.     

Construction of Urban Barrier Free Environment Based on Dual-core Model

According to the investigations of urban barrier free facilities, there have been lots of progresses in constructions of barrier free in cities recently. But there are no systematic barrier free facilities in these cities, which would restrict the function and effect of urban barrier free facilities for the handicapped and the elder. This paper puts forward that there should be a development from the urban barrier free facilities to the urban barrier free environment. There are two parts in the barrier free environment,that is the hardy environment and soft environment. Finally,an in-series connection two-core model of barrier free environment has been designed and discussed.     

The Effect of the Components of VAE Latex Modified Cementitious Compound Waterproofing Coating on Its Properties

In this paper the effect of the components of VAE latex modified cementitious waterproofing coating on its properties is studied. The results show that the tensile strength, bond strength and water resistance of the compound water proofing coating increase greatly in comparison with those of the coating without addition of cement. This compound coating is a new type of waterproofing material with excellent performance.     

黄瓜涂膜保鲜研究

以津研7号黄瓜品种为试材,采用不同浓度的壳聚糖及依柯系列涂膜剂、不同保鲜剂进行低温(10℃)涂膜保鲜试验。结果表明:壳聚糖涂膜剂的最佳使用浓度为15倍稀释液,作用效果以15倍 Ⅲ号保鲜剂结合处理最好。在10℃条件下贮藏28天,无明显霉烂、“大头”、发糠现象,色泽正常,风味较浓。依柯6号处理效果次之。     

毛叶枣涂膜保鲜技术的研究

以瓜尔豆胶、卡拉胶、分子蒸馏单甘酯、乙醇、水、杀菌剂和防腐剂配制的涂膜保鲜剂,处理毛叶枣果实可延长其货架寿命.试验结果表明,复合涂膜剂效果优于单一涂膜剂.     

蓝莓涂膜保鲜研究进展

蓝莓营养丰富,是人类五大健康食品之一,备受消费者青睐.蓝莓采摘多集中于高温高湿季节,由于采后果实生理代谢旺盛,不耐贮藏,极大地限制了蓝莓产业的发展.涂膜保鲜具有操作方便、保鲜效果好、绿色健康等优点,在蓝莓保鲜贮藏中发展前景广阔.本文综述了涂膜技术在蓝莓贮藏保鲜中的研究进展,主要介绍了涂膜保鲜原理及蛋白质、脂质和多糖等可食用性涂膜材料在蓝莓保鲜中的应用现状,并对未来的研究方向进行了展望.     

黄瓜涂膜保鲜研究

通过试验确定了黄瓜复合涂膜液的最佳配比:蔗糖脂肪酸酯3.75%,海藻酸钠0.5%,可溶性淀粉6.5%,甘油1%,苯甲酸钠0.1%。用此复合涂膜液在40℃浸泡黄瓜2min,自然风干后置室温下贮藏,可明显延长黄瓜的货架寿命。     

超微细化淀粉涂膜保鲜鸡蛋的研究

以超微细化淀粉为材料涂膜新鲜鸡蛋,通过单因素试验和正交试验,确定制备超微细化淀粉涂膜液的最佳条件,比较超微细化淀粉与液体石蜡、大豆蛋白和壳聚糖的保鲜效果。结果表明,超微细化淀粉涂膜液可以有效的减少鸡蛋的失质量;超微细化淀粉涂膜液的最佳条件是淀粉球磨15 h,质量分数为5.67%,pH值为6,此条件下超微细化淀粉保鲜鸡蛋的效果差于液体石蜡而优于大豆蛋白和壳聚糖。     

种衣剂处理对水稻秧苗的生理效应研究初报

采用科农16号、ZSB、优富8号和华农3号四种种衣剂处理水稻种子,结果表明:经种衣剂处理后水稻秧苗叶片N、P、K、总糖、蛋白质和叶绿素的含量提高,氨基酸含量下降,从而有利于光合产物的积累,提高秧苗素质.     

多尺度DEM提取河流比降的对比分析

研究旨在用DEM计算河流比降,分析DEM分辨率与阈值对比降的影响,并提取最佳分辨率与最佳阈值。以延河流域的ASTER GDEM和SRTM3 DEM为原始数据源,利用Arc GIS分别提取60、150、200、300 m分辨率下延河流域的主河道,并据此计算流域平均比降。结果表明:延河的平均比降为3.39‰;DEM分辨率与汇流阈值对比降影响较大,当DEM分辨率小于150 m时,比降随阈值增大而减少;DEM分辨率大于150 m,比降逐步增大。延河流域河流比降分析的DEM分辨率不宜超过150 m,其中DEM分辨率为90 m时,计算的比降结果较为符合延河流域实际情况;DEM分辨率为30、60、90、150、200、300 m时,计算比降的最佳阈值分别为65000、60000、30000、70000、40000、20000;利用85%的主河道折线段信息,进行比降计算,其结果接近真实值。研究实现了基于DEM的河流比降计算,有助于DEM在水文学等流域的应用。     

Influence of Indoor Thermal Environment on Thermal Comfort of Human Body

Analyses the thermal environment parameters from physiological aspect and from psychological aspect respectively. Introduces the conception of thermal comfort of human body from heat balance aspect. Presents some measures to improve indoor thermal environment and advance thermal comfort of human body. Analyses the influence of indoor thermal environment on thermal comfort of human body and some questions on the aspect of this research, also puts forward some advices.     

Thermal Properties of Low Melting Point Microencapsulated Paraffin Insulation Mortar

Microencapsulated paraffin insulation mortar (MPIM) was prepared by using low melting point microencapsulated paraffin (MCP) as phase change material. The phase change temperature, enthalpy, thermal conductivity coefficient and phase change thermal storage properties were tested. The result shows phase change temperature and enthalpy of the MPIM are 33 ℃ and 13.42 J/g, respectively. The thermal conductivity coefficient decreases with the increase in the dosage of silane coupling and binder. The thermal conductivity coefficient decreases with the increase in the dosage of the MCP, and then increases. Compared with blank specimens, the heating rate and cooling rate of the MPIM is definitely lagged, and it has good thermal storage properties.     

不同涂膜处理对袖珍黄瓜保鲜效果的影响

选用海藻酸钠、明胶、壳聚糖、硬脂酸等原料作为涂膜对袖珍黄瓜进行涂膜处理,分别对袖珍黄瓜的失重率、呼吸强度、烂果率、叶绿素含量、硬度及可溶性固形物进行了测定。试验结果表明,第一层为海藻酸钠瑚胶（1％／0．3％）第二层为硬脂西垒,色拉油（1g/2mL）的两层膜保鲜效果最好,能抑制袖珍黄瓜的呼吸作用,阻止可溶性固形物的分解。     

壳聚糖单一及复合涂膜对葡萄保鲜效果的影响

研究壳聚糖单一及复合涂膜对葡萄贮藏品质和生理代谢的影响,以黑提葡萄为研究材料,用壳聚糖单一涂膜及壳聚糖与高良姜或茶多酚复配涂膜葡萄,室温贮藏,测定贮藏期间好果率、失重率、呼吸强度、可滴定酸(TA)和丙二醛含量(MDA)、超氧化物歧化酶(SOD)活性等的变化。结果表明,壳聚糖涂膜可以明显降低贮藏葡萄的呼吸代谢强度和水分的散失程度,降低TA含量下降的速度,增加葡萄好果率,并降低MDA积累量和SOD活性下降的速度,且壳聚糖和茶多酚或大蒜素复配涂膜处理的效果好于单一壳聚糖涂膜处理。因此,壳聚糖复合涂膜用于葡萄保鲜有较好的应用前景。     

毛酸浆果涂膜保鲜技术的探讨

选用天然壳聚糖保鲜剂对毛酸浆果进行涂膜保鲜实验,探讨了不同条件下壳聚糖涂膜处理对毛酸浆果生理及贮藏效果的影响.并通过正交实验确定了最佳保鲜条件,涂膜保鲜剂浓度为15%,保鲜助剂为1%,温度为4℃.     

壳聚糖涂膜对绿竹笋采后保鲜效果的影响

绿竹笋采后常温下保鲜期仅为1 d。本试验将带笋箨绿竹笋采后用1.5%壳聚糖溶液(壳聚糖溶于5 mmol/L草酸)涂膜处理后,贮藏在4℃、相对湿度85%~90%的冷库中,研究壳聚糖涂膜对采后绿竹笋的保鲜效果。结果表明,壳聚糖涂膜可显著延缓绿竹笋的硬度、纤维素和木质素增加的速率,减少总糖的消耗,抑制苯丙氨酸解氨酶(PAL)和多酚氧化酶(PPO)活性,有效降低采后绿竹笋的木质化程度和褐变指数,保持笋肉的良好品质,冷藏10 d的绿竹笋腐烂率5%,可食率95%。     

浅谈涂膜技术在果蔬保鲜上的应用

介绍了涂膜保鲜的原理及各种常见涂膜剂的研究与应用,为果蔬涂膜保鲜技术的发展和应用提供了技术借鉴。