型煤燃烧及固硫技术的研究

本文对目前国内外型煤燃烧及固硫剂的研究发展状况进行了较详细的阐述,可为今后固硫型煤配制工艺提供一定的依据。     

The innovative safe fixative for histology,histopathology, and immunohistochemistry techniques: “Pilot study using shellac alcoholic solution fixative”

The concerns over health and workplace hazards of formalin fixative, joined to its cross‐linking of molecular groups that results in suboptimal immunohistochemistry, led us to search for an innovative safe fixative. Shellac is a natural material which is used as a preservative in foods and pharmaceutical industries. This study was undertaken to evaluate the fixation adequacy and staining quality of histopathological specimens fixed in the “shellac alcoholic solution” (SAS), and also to determine the validity of immunohistochemical staining of SAS‐fixed material in comparison to those fixed in formalin. Fresh samples from 26 cases from various human tissues were collected at the frozen section room of King Abdulaziz University Hospital, and fixed in SAS fixative or in neutral buffered formaldehyde (NBF) for 12, 18, 24, and 48 h, and processed for paraffin sectioning. Deparaffinized sections were stained with hematoxylin and eosin (H&E) and immunostained for different antigens. The tissues fixed in SAS for >18 h showed best staining quality of H&E comparable to NBF‐fixed tissues. Comparison of the immunohistochemical staining of different tissues yielded nearly equivalent readings with good positive nuclear staining quality in both fixatives. These findings support the fixation and preservation adequacy of SAS. Furthermore, it was concluded that the good staining quality obtained with SAS‐fixed tissues, which was more or less comparable with the quality obtained with the formalin fixed tissues, supports the validity of this new solution as a good innovative fixative. Microsc. Res. Tech. 77:385–393, 2014. © 2014 Wiley Periodicals, Inc.     

Some characteristics of the buffer vehicle in glutaraldehyde-based fixatives

The pH of sixteen different buffer vehicles is lowered by the addition of glutaraldehyde. This is the case even if the concentration of the buffer is as high as 0.2 m and that of the glutaraldehyde as low as 2%. Graphs are given which make it possible to determine which buffer has the highest buffering capacity at pH-values between 6.5 and 8. Graphs illustrating the influence of concentrations of glutaraldehyde between 1% and 5% on the dissociation constant of these buffers make it possible to formulate a glutaraldehyde-based fixative in which an optimally-buffered vehicle can contribute to the attainment of an osmotically-balanced fixative.     

电解回收废定影液中银的研究

文章以广州某医院的废定影液作试料,采用电解法回收废定影液的银。实验表明,在极距为10mm,电流密度为0．25A／dm2,电解时间为2h的条件下,银的回收率可达到90％。     

铁轨防爬器的成形仿真及模具设计

采用先进CAE技术对铁轨防爬器的成形进行模拟 ,找出成形过程中产生两种缺陷的原因 ,并提出合理的解决方案 ,应用于实际生产取得良好的效果。     

贮藏温度及护色剂对鲜切水芹贮藏品质的影响

为延长鲜切水芹的贮藏期,提高其贮藏品质,本文采用植物生理指标的常规检测方法研究了鲜切水芹在（5±1）、（15±1）、（25±1）℃贮藏条件下及在最适贮藏温度下经CA（柠檬酸）、PA（植酸）和L-Cys（L-半胱氨酸）等护色剂处理后的呼吸速率、失重率、叶绿素、抗坏血酸、还原糖和褐变度的变化规律。结果表明:在8 d的储藏期内,低温（5±1）℃较（15±1）℃更有利于降低水芹呼吸速率、褐变度和失水率,保持较高的还原糖、抗坏血酸和叶绿素含量;护色剂处理有抑制鲜切水芹褐变和衰老的作用,其中以0.25%L-Cys（L-半胱氨酸）效果为最好。      

聚酰胺纤维的染料固色剂研制与测试

介绍了酸性染料染聚酰胺纤维固色剂的研制与测试．固色处理后，可以改善染色物的宅洗牢度、耐氯牢度、摩擦牢度及汗渍牢度．     

甘薯全粉生产过程中护色工艺研究

主要研究甘薯全粉生产工艺环节中护色剂、护色时间、及高温处理对甘薯护色效果,利用回归正交得到最佳复合护色剂,即0.58%柠檬酸和0.5%亚硫酸钠。通过单因素试验,得出复合护色剂最佳浸泡时间为45min;经护色处理后甘薯多酚氧化酶(PPO)活性为0.083,其抑制率达87.52%。     

果蝇的透射电镜制样方法研究

果蝇作为一种模式生物,被广泛应用于遗传学、发育的基因调控、人类疾病机制等研究。透射电镜能够观察细胞的超微结构及其变化,是研究果蝇细胞生物学的重要方法之一。本实验研究发现,果蝇样本固定前用双面刀片快速切下头部,固定液能快速有效地固定其体内组织成分,防止内部组织溶解;使用琼脂预包埋果蝇样本,将其修整为长方体,增加其自重,固定其包埋方向,为后续目标位置的超薄切片起到定位作用。     

天然护色剂对酱牛肉护色效果的研究

针对于用红曲红色素作为表面着色剂的小包装方便酱卤肉制品在贮藏期间易发生氧化褪色这一现象,通过测定贮藏过程中酱牛肉的pH、红度值、色素残留率、感官评价,研究抗坏血酸钠、葡萄糖、茶多酚及其复合剂作为抗氧化剂对产品表面红曲红色素的保护效果。研究表明:0.05%的茶多酚护色效果最为显著,0.06%的抗坏血酸钠和0.01%的葡萄糖也明显起到了护色的效用,复合剂的相乘效用使其比单一组抗氧化效果更明显,且与市售护色剂间存在明显差异性(P<0.05)。复配护色剂(0.06%抗坏血酸钠+0.01%葡萄糖+0.05%茶多酚)能使酱牛肉储存28d后,红度值仍能达到12.51、色素残留率达到46.54%、感官评价达到3.5分,与对照组差异显著(P<0.05)。