阳离子乳化沥青CA砂浆的制备及性能

CA砂浆是板式无碴轨道结构弹性调整层的核心。通过正交试验研究了水泥、沥青乳液和砂的用量对CA砂浆工作性能的影响规律。结果表明:流动度随着水泥、沥青和外加水用量的增加而增加,而随着砂的用量的增加而减小;膨胀率随着铝粉掺量的增加而增大;弹性模量随着水泥和砂的用量的增加而增加,随着沥青乳液用量的增加而降低。     

新型灭螺剂的研究进展

血吸虫病在我国分布范围较广,严重威胁人们的身体健康,目前控制血吸虫病的有效方法就是杀灭钉螺。福寿螺作为一种外来入侵种,对水稻、蔬菜等农业生产造成了极大的损害。文章综述了我国目前采用的几种灭螺方法,介绍了利用化学药物和植物资源灭螺的研究机理和研究新进展,为灭螺剂的研究提供依据。     

改善超重质油流动性的技术——超临界水技术

作为人类最宝贵的资源,石油在世界各国国民经济的发展中一直起着很重要的作用。但是,与天然气、煤炭等相比,石油的可开采时间最短。因此,加拿大油砂等非常规石油资源作为石油有效的补充逐渐受到人们的关注。但是,与中东原油等常规原油相比,加拿大油砂是使用性能极差的原油,从加拿大油砂提取的油砂沥青流动性非常差,很难通过管道输送的方法运输到炼油厂,因此其利用受到很大的限制。针对这一情况,研究人员利用超临界水进行了降低超重质油粘度,改善其流动性的研究工作,取得了很好的结果,可为利用加拿大油砂等非常规石油资源、保障未来能源安全起积极的作用。     

IA/AA/AMPS水煤浆分散剂的制备及性能

以丙烯酸(AA)、衣康酸(IA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)为反应单体,过硫酸钾和亚硫酸氢钠为氧化-还原体系引发剂,通过自由基聚合制备了IA/AA/AMPS三元共聚物水煤浆分散剂,并通过红外光谱(IR)、黏度仪进行了测试。结果表明,共聚物中引入了磺酸基和羧酸基;同时,对不同水煤浆质量分数和不同分散剂添加量的水煤浆进行了研究,水煤浆的最佳成浆质量分数为68%,当添加质量分数为0.6%的分散剂时,分散效果最佳。     

10％毒死蜱颗粒剂的配方及加工工艺

[目的]通过试验筛选出10％毒死蜱颗粒剂的优惠配方和连续化加工工艺.[方法]以天然颗粒为载体,采用吸附法工艺,研究该制剂的配方组成、加工工艺和设备选型.[结果]试验产品质量稳定合格,流动性好,(54±2)℃、14d毒死蜱分解率≤5％,破碎率≤10％.[结论]在试验选定的配方条件下,所选的加工设备可以实现加工工艺连续化,各项技术指标符合颗粒剂的要求.     

Improved performance of a tubular microbial fuel cell with a composite anode of graphite fiber brush and graphite granules

In this study, a composite electrode combined of a graphite fiber brush and carbon granules (MFC-GFB/GG) was adopted as the anode of a tubular microbial fuel cell (MFC). Compared with an MFC with graphite granules (MFC-GG) and an MFC with a graphite fiber brush (MFC-GFB), MFC-GFB/GG showed a longer lag time during the start-up process, while it reached the highest operating voltage at 50 Ω. Furthermore, during the stable operation, the MFC-GFB/GG achieved the highest power density of 66.9 ± 1.6 W m⁻³, which was about 5.3 and 1.2 times as that of MFC-GG and MFC-GFB, respectively. The highest performance of the MFC-GFB/GG can be attributed to the highest active biomass content on the electrode and the smallest internal resistance of the MFC. The optimum COD concentration was found to be 500 mg COD L⁻¹ for MFC-GFB/GG.     

粉煤灰陶粒在处理含铬废水中的应用研究

将粉煤灰、黏土及木炭粉按比例混合,烧制成陶粒,以铬(Ⅲ)质量浓度20 mg/L的水溶液模拟废水为研究对象,利用粉煤灰制备的陶粒吸附处理铬(Ⅲ),测试单位时间水流量、pH值、温度对除铬效果的影响。结果表明当粉煤灰、黏土及木炭粉的比例为85:10:5时陶粒同时具有较好的吸水性和抗压强度,在最佳条件下铬(Ⅲ)去除率可达99%以上。     

石灰粉煤灰稳定粒料路面基层的研究与应用

用石灰粉煤灰稳定碎石、砾石、煤矸石等筑路材料作为路面的基层结构, 用于路基层和底基层铺设, 对材料技术指标、组成设计、质量控制、检测方法、工艺等进行了研究, 取得了满意的结果。     

小麦A、B型淀粉分离提取方法研究

该研究对小麦A、B型淀粉分离提取方法进行探讨,结果表明,采用水柱沉淀离心法,在淀粉浆浓度0.1 g/mL、离心速度200 r/min、静置时间40 min和静置次数3次条件下,可快速、有效分离A、B型淀粉;A、B型淀粉得率分别为74.2%和23.7%,淀粉损失2.1%。经显微照相显示,此条件下A、B型淀粉分离彻底。     

Rheological properties,stability and sensory evaluation of low-cholesterol mayonnaises prepared using egg yolk granules as emulsifying agent

No important practical applications have been developed for egg yolk granules until now. However, as they have low cholesterol content and maintain good emulsifying properties, granules could be employed as a potential ingredient in the food industry. In this work, granules obtained in the laboratory by a simple procedure were used as emulsifying agent in mayonnaise preparation. The aim was to develop a low-cholesterol mayonnaise with properties similar to those of typical mayonnaise. For this purpose, three low-cholesterol formulations prepared in the laboratory were compared with a mayonnaise prepared using yolk and also with a commercial mayonnaise. The rheological characteristics of mayonnaises were evaluated, as well as their microstructure and sensorial properties. In addition, colour and particle size measurements at different times of storage were carried out to assess stability. According to results, the use of granules allows the preparation of a low-cholesterol mayonnaise which shows similar characteristics to those of a typical mayonnaise.