球罐开罐检验分析及球罐的安全质量控制

通过对兴平化肥厂 6 0 0m3 液氨球罐历次全面定期检验中发现的缺陷分析 ,指出了球罐主要缺陷及其产生的条件和机理 ,从制造工艺控制、运行中介质有害物质的控制及水压试验等几方面 ,论述了球罐质量控制的问题 ,提出了预防主要危害缺陷的方法     

Seawater-soluble pigments and their potential use in self-polishing antifouling paints: simulation-based screening tool

This work concerns the on-going development of efficient and environmentally friendly antifouling paints for biofouling control on large ocean-going ships. It is illustrated how a detailed mathematical model for a self-polishing antifouling paint exposed to seawater can be used as a product engineering tool to obtain a quick estimate of the paint behaviour that a given seawater-soluble pigment will provide. In the present context, “pigment” refers to relevant particulate solids of organic-, inorganic-, or biological nature. Simulations performed at 15 and 30 °C suggest that pigment solubility and seawater diffusivity of dissolved pigment species have a significant influence on the polishing and leaching behaviour of a typical self-polishing paint system. The pigment size distribution, on the other hand, only has a minor influence on the paint–seawater interaction. Simulations also indicate that only compounds which are effective against biofouling at very low seawater concentrations are useful as active antifouling paint ingredients. The need for model verification and exploration of practical issues, subsequent a given pigment has been found of interest, is discussed. The model approach is of relevance in the search for novel antifouling paints and for the development of accelerated test methods.     

弹药性能试验回归方法优选

论述了弹药性能试验回归建模，普遍存在自变量的多重相关性，为克服自变量多重要关性的缺点，选取较好的回归方法是关键的技术途径，实践表明，偏最小二乘回归是一种可以采用的方法。     

壳聚糖及其衍生物的吸附特性研究进展

综述了壳聚糖及其衍生物对重金属离子、酸和有机染料等吸附特性的研究进展。     

我国纳滤膜技术的研究进展

本文对近十几年来我国纳滤膜技术的研究进展概况作了综合介绍。     

Exploring the efficacy of AHA–BHA infused nanofiber skin masks as a topical treatment for acne vulgaris

This study investigates the efficacy of AHA–BHA infused nanofiber skin masks as a topical treatment for acne vulgaris. The skin is a vital organ that functions as a barrier to protect the body from external substances. In recent years, there has been a growing emphasis on skin treatment research. Hyaluronic acids (HAs) are commonly used in cosmetic and drug formulations to regulate excessive skin cornification, making them promising candidates for acne treatment. The introduction of HAs in dermatology has revolutionized the field of skin care, and they are used to treat various skin disorders, such as acne, ichthyosis, keratoses, warts, psoriasis, and photoaged skin. The antiaging benefits of HA have gained considerable attention in cosmetic dermatology, resulting in a surge in cosmetic products and skin care systems that contain HA. The study found that AHA–BHA-infused nanofiber skin masks are effective in treating acne vulgaris. The nanofiber masks were found to reduce inflammation, sebum production, and acne lesions. The study suggests that AHA–BHA-infused nanofiber skin masks could be a promising topical treatment for acne vulgaris.     

涡轮增压器蜗壳喷嘴出口速度计算

以k-ε双方程模型模拟车用柴油机涡轮蜗轮蜗壳内的气体流动情况，以心形线拟合蜗壳的通流截面，用SIMPLEST算法对驿蜗壳喷嘴出口气流角和速度的分布情况进行了三维数值计算，并将计算结果与实测流场进行了比较，两者分布规律吻合较好。     

Polymerization of epoxides catalyzed by a mixed‐valent iron trifluoroacetate [Fe3O(O2CCF3)6(H2O)3]

The readily available mixed‐valent iron trifluoroacetate complex [Fe₂^IIIFe^II(µ₃‐O)(O₂CCF₃)₆(H₂O)₃] is an effective catalyst for the polymerization of epoxides. A very small amount of the catalyst (1.0–0.01 mol%) could initiate the polymerization of cyclohexene oxide, cyclopentene oxide and epichlorohydrin. Based on quantitative end‐group analysis by ¹⁹F NMR spectroscopy, a Lewis acid (LA^⊕) catalyzed anionic reaction mechanism is proposed. Copyright © 2012 Society of Chemical Industry     

新型催化蒸馏塔在合成甲基叔丁基醚中的应用

分析了已有的合成MTBE催化蒸馏塔结构,同时构思了新型填料式催化蒸馏塔.在模拟催化蒸馏试验装置上,利用YLQ-1型"异形”树脂催化剂进行了合成MTBE研究,获得了反应温度、液空速、回流比等有关工艺条件数据.     

QZ201/QZ202型二段炉转化催化剂的工业应用

以高温烧结氧化铝为载体,镍为活性组份,高熔点稀土氧化物为助剂制备的二段转化炉催化剂具有使用强度高,耐热性能好,转化活性稳定。床层阻力降低等特点。工业应用结果表明,该催化剂的综合性能达到国内同类催化剂的水平。