库粉在烧结生产中的应用

库粉具有含铁品位高、含SiO2和Al2O3低、价格低等特点,为了充分利用库粉,针对其粘性差、含结晶水影响烧结料层透气性的问题,进行了优化配料结构和烧结工艺参数的生产试验。结果表明,在保证烧结矿产量、质量的基础上,可以配加12%库粉,既满足了高炉的需要,又可降低原料成本。

脱硫石粉贮存库气化装置改造

对火电厂脱硫石粉贮存库运行过程中散装机出料口下料缓慢、进气母管及气化槽体中进粉等问题进行了分析,提出了改造对策。石粉贮存库气化装置改造后运行效果良好,以60 t罐车为例,石粉的装车时间由原来的30m in减少到15m in。

关于煤粉库设计的有关问题

介绍了煤粉在铸造生产中的储运及工艺特性，防自燃的袋装煤粉库工艺布置、火灾报警装置、自动灭火系统、国外筒仓储存实例，储存运输系统设计中应考虑的问题。

大型粉状物料储库的改造

我公司一期电石渣储库因水分较高,在库内壁及库底黏附、板结、且硬化,库内卸料料流呈现漏斗状,使库底充气箱逐渐失效,无法使物料呈流态分布,因其单库储量大,且在储存过程中有大量残留乙炔气等可燃气体,清理时非常危险,人工无法清库,持续使用有效库容降低。为此,在我公司二期电石渣储库施工时,改变了库内结构,增设一个减压锥,分解垂直压力,库直筒与锥体连接处做环形充气流化管,强化分区喷吹,破坏物料结拱。本项改造完成后,卸料时再无漏斗及边壁效应,使用效果良好。

Relationship between tea dust exposure and lung function: a systemic literature review

Background:During the production of tea,tea dust has been viewed as a risk factor that may cause the suffering of changes of lung function and respiratory symptoms.Objective:To review whether the occupational exposure to tea dust may lead to the changes of lung function and respiratory symptoms.Methods:We searched the literatures in March 2012 in the databases of Medline,EMBase,Web of Science,Wan-Fang Database and CNKI.The search condition is"(herb OR tea)AND(lung function OR ventilatory function OR pulmonary function OR spirometric measurement)".The paper should be pubished in Enghish or Chinese,with internal or external controls.Results:Totally 17 papers were included.Both acute and chronic changes of lung function were referred.In addition,the respiratory symptoms such as cough,tightness and etc.were also reported and discussed.Conclusion:We concluded that the exposure of tea dust may lead to the changes of lung function and respiratory symptoms.

Construction of normal human IgE phage antibody library and the screening of the anti-trichosanthin IgE

Allergen specific IgE response is the major cause of immediate hypersensitivity. However the number of IgEproducing B cells and the amount of IgE, especially the specific IgE, are so low, it greatly impedes the study of the allergic-specifc antibody responses. Here we report the construction of a normal human IgE combinatorial library The repertoire of IgE VH genes and of K genes were separately amplified from normal human peripheral blood lymphocytes through RT-PCR, and were then constructed to form the phage surface display human Fab(IgEVH) library. A plant protein allergen, trichosanthin(TCS), was used to affinity-enrich and to screen the anti-TCS phage HuFab clones from the library. Human IgE(Fab) to TCS were detected.

Low humic acids promote in vitro lily bulblet enlargement by enhancing roots growth and carbohydrate metabolism

Bulblet development is a problem in global lily bulb production and carbohydrate metabolism is a crucial factor. Micropropagation acts as an efficient substitute for faster propagation and can provide a controllable condition to explore bulb growth. The present study was conducted to investigate the effects of humic acid （HA） on bulblet swelling and the carbohydrate metabolic pathway in Li/ium Oriental Hybrids ＇Sorbonne＇ under in vitro conditions. HA greatly promoted bulblet growth at 0.2, 2.0, and 20.0 mg/L, and pronounced increases in bulblet sucrose, total soluble sugar, and starch content were observed for higher HA concentrations （_〉2.0 mg/L） within 45 d after transplanting （DAT）. The activities of three major starch synthetic enzymes （including adenosine 5＇-diphosphate glucose pyro- phosphorylase, granule-bound starch synthase, and soluble starch synthase） were enhanced dramatically after HA application especially low concentration HA （LHA）, indicating a quick response of starch metabolism. However, higher doses of HA also caused excessive aboveground biomass accumulation and inhibited root growth. Accordingly, an earlier carbon starvation emerged by observing evident starch degradation. Relative bulblet weight gradually decreased with increased HA doses and thereby broke the balance between the source and sink. A low HA concentration at 0.2 mg/L performed best in both root and bulblet growth. The number of roots and root length peaked at 14.5 and 5.75 cm respectively. The fresh bulblet weight and diameter reached 468 mg （2.9 times that under the control treatment） and 11.68 mm, respectively. Further, sucrose/starch utilization and conversion were accelerated and carbon famine was delayed as a result with an average relative bulblet weight of 80.09%. To our knowledge, this is the first HA application and mechanism research into starch metabolism in both in vitro and in vivo condition in bulbous crops.

Enhancing the reversible capacity and cycle stability of lithium-ion batteries with Li-compensation material Li_(6)CoO_(4)

High-capacity anode materials,such as SiO and Si/C,are considered promising candidates for high-energydensity lithium-ion batteries.However,the low initial Coulombic efficiency of these anode materials induced by side reactions(forming Li_(2)O and lithium silicate)and the formation of solid electrolyte interface film reduces the active Liions and causes low-discharge capacity.Adding a Li-compensation material in the cathode or anode is an effective strategy to overcome this problem.The most used Li-compensation material is the stabilized lithium metal powder.However,this strategy has high safety risks,high costs,and is challenging to quantify.Herein,the Li-compensation material of Li_(6)CoO_(4) is synthesized and investigated.The preparation conditions,stability in the air,delithiation mechanism,and structural transformation are analyzed and discussed.Electrochemical tests reveal that the discharge capacity and capacity retention of the full pouch cells(3-Ah)with Li_(6)CoO_(4) additive is significantly improved.Also,the reason for such improvement is investigated.This work provides an effective strategy of Li-compensating technology to enhance the electrochemical performance of lithium-ion batteries.