矿化垃圾水生植物床处理印染废水的初探

用矿化垃圾作为水生植物床的基质代替基质中土壤的作用,分别选择水葫芦和空心莲子草作为水生植物床的植物,制成了人工水生植物床,来尝试处理染料水溶液制成的模拟印染废水,并对比了染料在自然条件下的降解。     

矿化垃圾水生植物床处理印染废水的初探

用矿化垃圾作为水生植物床的基质代替基质中土壤的作用,分别选择水葫芦和空心莲子草作为水生植物床的植物,制成了人工水生植物床,来尝试处理染料水溶液制成的模拟印染废水,并对比了染料在自然条件下的降解.     

高碳铬铁电炉高基质干式打结料的研究

通过对组成打结料成分特性的研究，提出以优质原料生产的MgO-CaO-Fe2O3系合成砂为骨料，用MgO〉97％，粒度〈0．088mm烧结镁砂做细粉，适当添加超微粉等工艺措施，制成适当高碳铬铁电炉炉底用的高基质打结料，通过调控基质成分，实现材料相和固相的复合烧结。     

燃料电池及其相关材料新进展(二)

３４基质基质是通过毛细作用吸附磷酸而使电极保持电隔离的电池组件，由掺入适量ＰＴＦＥ作粘结剂（质量分数约３０％～５０％）的细而纯的ＳｉＣ粉制成。典型厚度为１８ｍｍ，每平方米可吸附１５ｋｇ电解质。如用聚苯并咪唑（ＰＢＴ）代替ＰＴＦＥ，基质中磷酸的吸...     

用Megafix BES染料进行铝阳极氧化膜染色

本文介绍了铝阳极氧化膜的染色机理和Megafix BES染料的染色性能，对Mgeafix BES染料染色工艺条件进行了探讨，推荐了Megafix BES染料染色实用工艺，为金属铝染色拓宽了染料应用范围，且色谱齐全，得色深浓，色泽鲜艳，性能优越。     

我国浅水湖泊富营养化治理的可用水生植物修复技术

结合国内外水体富营养化的研究现状,分析了水生植物的重要生态功能和生态地位,归纳了浅水湖泊水生植物生态修复和水华水体水生植物生态治理相关技术,并展望了今后的治理思路.     

硬质耐热烧结体

耐热烧结体的基质材料中合有金刚石颗粒,在真空中加热到1200℃这种基质材料的结构不会发生变化。基质材料的大部分表面上有用气相合成法沉积的多晶金刚石或多晶金刚石型的碳质等硬质涂膜。 烧结体是将气相沉积法合成的硬质膜涂于基质材料上而制成的。该烧结体用作大型粘结刀具材料,从而改善了材料的耐热性、强度及抗磨损能力。     

钼矿床工业分类实例

钼矿床作为以钼元素为主的矿物集合体，由于受成矿地质条件等因素的影响，致使矿床复杂多变。结合工作实践和相关矿山考察实例，提出钼矿床的工业分类。     

稀土与硫靛染料的相互作用研究

在四氢氟哺（ＴＨＦ）溶液中，稀土离子Ｅｕ￣（３＋）使硫靛染料（Ｔｈｉｏｉｎｄｉｇｏ）的分解明显加快，分解的产物中出现了乙烯基、醛基及酸酸基，其中羧酸基作为配位体与稀土Ｅｕ￣（３＋）形成了具有铕特征荧光的络合物。但是，染料分解的机理及Ｅｕ￣（３＋）的作用机理仍需进一步探讨。     

水生植物在富营养化湖泊生物修复中的作用

综述了国内外水生植物净化作用研究领域的主要成果,对水生植物在治理富营养化水体方面的发展方向作了展望.     

Thermal latency in radiofrequency ablation

The relative nail producing capacity of different regions within the nail matrix has not been quantified. In order to do this, the number of nail plate cells in the dorsoventral axis of 12 human great toenails was counted at five sites in the longitudinal axis, and compared with direct measurements of nail plate thickness at the same sites. The mean number of nail cells in the nail plate reached a maximum at the lunula, with no further increase along the length of the nail bed. At the mid-point between the proximal tip of the germinal matrix and lunula, mean cell numbers achieved 81% of the value at the lunula. Mean nail thickness was only 90% of its maximum at the lunula, with a further significant increase (P = 0.02) between the lunula and end of the nail bed. These observations suggest that the proximal nail matrix is the main source of nail within the matrix. This is consistent with clinical experience where distal matrix surgery has a low potential for scarring in comparison with proximal matrix surgery. The additional finding of increased nail thickness, but not cell numbers, along the nail bed make it likely that cells within the nail plate change shape as they move distally.     

微电解-JS试剂法处理印染废水的研究

印染废水是一种成分复杂、处理难度大、毒性高的工业废水,对环境危害极大.针对印染废水选择了合适的预处理方式,并建立一种微电解-JS试剂法处理印染废水的工艺.印染废水首先通过酸化絮凝预处理,再利用自制高活性微电解填料协同自行开发的JS试剂处理,最后通过加入石灰调节pH值为9,并进行混凝沉淀,废水色度基本脱除,COD含量降至...     

用涂料钛白粉制备聚酯消光化纤钛白

化纤钛白，主要用于聚酯消光，我国多数依靠进口。作者用涂料钛白粉BA01-01为原料，以吨级规模生产出化纤钛白TR-260，经有关单位应用，聚合、纺丝、染色均正常。     

酸性物料的粒度对承钢分流制粒厚料层烧结的影响

研究了承钢分流制粒厚料层酸性物料粒度对烧结工艺的影响。大粒度物料能改善料层的透气性,有利于厚料层的应用。酸性物料的粒度较大时,矿相里有大量集中分布的赤铁矿,局部形成交织熔蚀结构,能极大的改善钒钛磁铁矿的冶金性能。     

Galectin-1 and -3 in cells of the first trimester placental bed

The beta-galactoside-binding proteins galectin-1 and -3 are thought to modulate cell-extracellular matrix interactions in cell adhesion and migration. In this study, their occurrence in human trophoblast has been investigated. In the first trimester placenta galectin-1 is expressed in the cytotrophoblast of the mid and distal cell columns, but absent from the villous and proximal column cytotrophoblast. The villous syncytiotrophoblast was also positive. Galectin-3, on the other hand, was uniformly localized in the villous cytotrophoblast and mid and distal cell columns. Immunolocalization of these proteins in placental bed tissue has shown that galectin-1 and -3 are not present in cytokeratin-positive interstitially migrating cytotrophoblast. The co-localization of galectin-1 with extracellular laminin in cultures of cytotrophoblast, choriocarcinoma or decidual stromal cells is consistent with a role in the organization of extracellular matrix and the regulation of cell motility.     

江西省弋阳县管坑石墨矿床地质特征

管坑石墨矿床位于华夏板块北缘北武夷隆起与抚州-饶南拗陷交接处。矿体长400~1200m,厚1.22~18.63m,呈似层状、透镜状,顺层产于上震旦-下寒武统外管坑组中深变质岩中,矿床规模达大型以上,成因类型属沉积变质叠改型。矿石类型以片岩型为主,矿物成分主要为晶质石墨,片径大者0.15mm,小者0.01mm,多数界于0.02~0.04mm之间。     

Effect of wide spectrum anti-helminthic drugs upon Schistosoma mansoni experimentally infected mice

An important issue of concern for drug analysis in hair is the change in the drug concentration induced by the cosmetic treatment of hair. The products used for this treatment are strong bases and they are expected to cause hair damage. As a result drugs may be lost from the hair matrix or, under conditions of environmental contamination, be more easily incorporated into the hair matrix. We investigated the effects of cosmetic treatment in vivo by analysing hair samples selected from people who had treated their hair by bleaching or dyeing before sample collection. All of the subjects admitted a similar drug consumption during the time period for which the strands were analysed. Samples were viewed under a microscope to establish the degree of hair damage. Treated and untreated portions from each lock of hair were then selected, separated and analysed by standard detection procedures for cocaine, opiates, cannabinoids and nicotine. In all cases the drug content in hair that had undergone cosmetic treatment decreased in comparison to untreated hair. The majority of the mean differences were in the range of 40%-60% (cocaine, benzoylecgonine, codeine, 6-acetylmorphine and THC-COOH). For morphine the mean difference was higher than 60%, and two cases (THC and nicotine) differed by approx. 30%. These differences depended not only on the type of cosmetic treatment, as bleaching produced higher decreases than dyeing, but also on the degree of hair damage i.e. the more damaged the hair, the larger the differences in the concentration levels of drugs.     

Effects of rapid heating on solutionizing characteristics of Al-Si-Mg alloys using a fluidized bed

Effects of rapid heat transfer using a fluidized bed on the heat-treating response of Al-Si-Mg alloys (both unmodified and Sr modified) were investigated. The heating rate in the fluidized bed is greater than in conventional air convective furnaces. Particle size analyses of eutectic Si showed that the high heating rate during fluidized bed solution heat treatment causes faster fragmentation and spherodization of Si particles compared to conventional air convective furnaces. The mechanism of Si fragmentation through fluidized bed processing is through both brittle fracture and neck formation and its propagation. In contrast to this, the mechanism of Si fragmentation using a conventional air convective furnace is through neck formation and propagation. The Sr-modified D357 alloy showed a faster spherodizing rate than the unmodified alloy. Thermal analyses showed an exothermic reaction during solution heat treatment using a fluidized bed due to recrystallization, and coarsening of eutectic Al grains. Whereas the alloy solutionized using a conventional air convective furnace showed two exothermic reactions, one due to annihilation of point defects and the other due to recrystallization, and coarsening of the eutectic grains in the aluminum matrix. The recrystallization temperature of the alloy solutionized in the fluidized bed is lower than those in the conventional air convective furnace. Both tensile strength and elongation of fluidized bed solutionized alloys are greater than those solutionized using the air convective furnace. The optimum heat-treatment time for T4 temper using a fluidized bed for unmodified and Sr-modified alloy was reduced to 60 and 30 minutes, respectively.     

Leptin is an endogenous protective protein against the toxicity exerted by tumor necrosis factor

Decrements in muscle strength as a result of prolonged bed rest are well defined, but little is known about potential countermeasures for preventing loss of strength under this condition. The purpose of this study was to determine whether testosterone administration would preserve protein balance and muscle strength during prolonged bed rest. Ten healthy men (age, 36 +/- 2 yr; height, 177.2 +/- 3.4 cm; weight, 80.5 +/- 3.9 kg; mean +/- SE) were admitted to our in-patient metabolic unit. After a 1-week ambulatory run-in period, each subject was confined to bed for 28 days at 6 degree head-down tilt while receiving a daily oral dose of T3 (50 microg/day). During the bed rest/T3 period, six of the men were randomized to receive testosterone enanthate by i.m. injection (T; 200 mg/week) while four received placebo in a double blind fashion. Nitrogen balance was determined throughout, and whole body [13C]leucine kinetics were assessed at baseline and on day 26 of bed rest. Before bed rest and on the third day of reambulation, the muscle strength of the knee extensors and flexors and shoulder extensors and flexors was determined at 60 degrees/s on a Cybex isokinetic dynamometer. Despite improved [13C]leucine kinetics and maintenance of nitrogen balance and lean body mass in T-treated subjects, little preservation of muscle strength, particularly in the knee extensors, was noted. Muscle strength [reported as the best work repetition in foot-pounds (FtLb)] for right knee extensors declined (P = 0.011) similarly in both groups; from 165 +/- 15 to 126 +/- 18 FtLb in T-treated men and from 179 +/- 22 to 149 +/- 13 FtLb in placebo-treated men. Overall, there was less of a decline in extension and flexion strength of the shoulder compared to the knee, with no benefit from T. These results suggest that in the absence of daily ambulatory activity, T administration will not increase or, in the case of this bed rest model, preserve muscle strength.