洁净手术室新风深度除湿与变新风量系统节能设计探讨

医院洁净手术部是医院中能耗较多的单位,净化工程中对节能设计的研究和实践一直是净化设计的重点。文章尝试采用新风深度除湿技术与变新风量空调系统相结合,以求降低净化空调系统能耗,探讨一种手术部可控性强、方便灵活的节能设计方案。     

A Comparison of Fresh Frozen vs. Formalin-Fixed,Paraffin-Embedded Specimens of Canine Mammary Tumors via Branched-DNA Assay

Mammary neoplasms are the tumors most affecting female dogs and women. Formalin-fixed, paraffin-embedded (FFPE) tissues are an invaluable source of archived biological material. Fresh frozen (FF) tissue is considered ideal for gene expression analysis. However, strategies based on FFPE material offer several advantages. Branched-DNA assays permit a reliable and fast workflow when analyzing gene expression. The aim of this study was to assess the comparability of the branched-DNA assay when analyzing certain gene expression patterns between FF and FFPE samples in canine mammary tumors. RNA was isolated from 109 FFPE samples and from 93 FF samples of different canine mammary tissues. Sixteen (16) target genes (Tp53; Myc; HMGA1; Pik3ca; Mcl1; MAPK3; FOXO3; PTEN; GATA4; PFDN5; HMGB1; MAPK1; BRCA2; BRCA1; HMGA2; and Her2) were analyzed via branched-DNA assay (b-DNA). ACTB, GAPDH, and HPRT1 were used as data normalizers. Overall, the relative gene expression of the two different origins of samples showed an agreement of 63%. Still, care should be taken, as FFPE specimens showed lower expression of the analyzed targets when compared to FF samples. The fact that the gene expression in FFPE proved to be lower than in FF specimens is likely to have been caused by the effect of storage time. ACTB had the best performance as a data normalizer.     

溶蚀型海洋防污涂料制备及其性能

目的 合成具有溶蚀性能的丙烯酸基体树脂,用该树脂制备中期效短期效溶蚀型海洋防污涂料。方法 自由基聚合法合成具有溶蚀性能的丙烯酸基体树脂,用该基体树脂配以市场价格较便宜性价比较高的有机类防污剂代森锌、吡啶硫酮锌、敌草隆等,颜填料,助剂等制备溶蚀型海洋防污涂料。通过实海挂板试验、耐淡水浸泡测试、涂层微观样貌对涂层进行表征。结果 丙烯酸基体树脂聚合物的数均分子量控制在25 000左右较为合适,即聚合反应温度控制在110 ℃,引发剂用量为4份时较为合适。羧酸单体的含量为25%~30%时,基体树脂具有较好的溶蚀性能。制备的溶蚀型防污涂料经24个月实海挂板试验验证,具有优异的防污期效,经过12个月淡水浸泡,涂层不起泡、不脱落。防污涂层表面微观样貌表征,基体树脂的溶蚀性能,防污剂溶出后,涂层表面粗糙度增大,表面留有孔洞。结论 该溶蚀型防污涂料具有优异的防污性能,能够防止海洋附着生物对船底和其他海洋设施的污损,可适用于中小型渔船对短期效海洋污损防护需求。     

中国大陆科学钻探钻探子工程钻进实时记录网页的开发

以中国大陆科学钻探实时记录网页的开发为例,介绍了在开发网络数据库时,利用Excel组件作输入界面,实现查询界面上表格的表头和表尾不动、而中间行可以滚动,实现回次滚动查询和界面实时刷新.     

干式文丘里在汽车厂喷涂车间的应用

传统汽车厂喷涂车间多采用湿式文丘里处理过喷漆雾,供风一次性利用,能耗高。为解决这个典型问题,分析了提高喷涂自动化率和运用于式文丘里技术两个方案。经试验得出：前者通过降低风速发挥一定节能作用,后者利用供风循环使得新风量低至20％,能耗成本约减少一半,效果显著。同时指出,干式文丘里也面临过滤芯膜高成本、石灰粉有效利用率不高等挑战,有待进一步完善,以促进其在汽车行业的广泛推广。     

一次回风空调系统设计中几个常见问题分析

结合一个改造工程实例,分析了一次回风系统设计计算中容易出现的几个概念性错误及其导致的严重后果.对设备选型中的几个关键点进行了剖析,并提出了一些建议.     

虹桥机场2号航站楼空调冷冻水系统手动调试

对虹桥机场2号航站楼空调冷冻水系统及其手动调试方法进行介绍,并分析采用直供式水系统的优点。     

Effects of rind removal on physicochemical quality characteristics of fresh‐cut watermelon [Citrullus lanatus (Thunb) Matsum & Nakai] during cold storage

The impact of removing the rind from fresh‐cut watermelon slices was assessed on the quality of the product during storage at 4 °C for 9 days. Flesh lycopene declined from 55.4 to 47.9 mg kg^?1 f.w. and colour lightness (L*) increased from 43.2 to 45.8 after 2 days of storage. Initial heart and placental flesh firmness increased from 7.3 and 9.8 N, respectively, to 9.5 and 12.8 N after 9 days, but were unaffected by rind processing. Electrolyte leakage from placental tissue was unaffected by storage and rind. Rind presence limited juice run‐off by 47.2% and maintained mean total soluble sugar concentration in the slices at 86.0 mg mL^?1 as opposed to 76.8 mg mL^?1 in rind‐less slices. Change in the quality was most pronounced between 0 and 2 day of storage. Removing the rind accelerated senescence and off‐flavour production, while the presence of rind improved the overall storage stability of fresh‐cut watermelon slices.     

空调水系统质调节研究

冷水机组是空调系统的主要耗能设备，在实际运行期间，其大多数时间处于部分负荷运行。本文分析了在部分负荷时，调节冷冻水温度和冷却水温度对冷水机组性能的影响，表明在满足舒适性要求和冷水机组正常运行的前提下，适当的提高冷冻水温度和降低冷却水温度可以达到节能的目的。