Turbulent Flow Action of Pulp in Wet - Laid Non - Woven Processes

The paper deals with the fluid field of web forming in wet-laid non-woven production.The influence of the turbulent flow on blending fiber and occluded fluid produced in pulp flow has been discussed in theory and practice.The suitable use of the imported velocity of pulp is very important in producing wet-laid products of good quality.     

亚铵黑液作肥料施于麦田对水环境的影响

为掌握亚铵黑液作肥料施于旱地对浅层地下水的影响．以麦田为研究对象．给出了旱地不同施肥方式黑液对浅层地下水的环境影响结果．     

用碱性脂肪酶消除磨木浆的树脂障碍的探索

用碱性脂肪酶对磨木浆及其沉积树脂进行水解和树脂沉积试验 .结果表明 :碱性脂肪酶能够消除树脂沉积 .加酶水解产物为较低粘性的组分 .加酶处理不会影响纸浆和纸的质量 .     

化学机械浆KMnO4-H2O2漂白的Excel数据分析方法研究

本文应用Excel软件，对添加高锰酸盐漂白活化剂的化学机械浆过氧化氢漂白工艺中的主要影响因素及其之间的关系的试验数据进行了州归统计分析，并取得了满意的结果。     

微粒助留系统对新闻纸浆细小组分助留效果的探讨

就微粒助留剂对新闻纸浆的助留效果进行了初步的探讨。实验结果表明 ,使用微粒助留剂能够显著提高新闻纸浆手抄片的灰分 ( 4 % ) ,而对纸张白度基本没有影响 ;并能使填料的留着率提高1 7%～ 2 5 %、细小纤维留着率提高 2 6%～ 32 %、排放白水中的总固形物减少 5 8%～ 69%     

Nematodes and the spleen: An immunological relationship

Despite being a major organ of the immune system, the spleen's role in resisting, controlling or simply ameliorating nematode infections has been neglected. A review of both filarial and gastrointestinal nematodes suggests that though it is difficult to fully assess or quantify the organ's importance in vivo, the spleen is prominent in acting against nematode parasites in mammals. One manifestation of this is that transfer of lymphocytes from the spleen of immunised individuals can protect recipients against the disease. Expansion of splenic lymphoid tissue also alludes to its activity during nematode infection. There is a considerable need for investigation of the spleen under natural conditions as well as much more rigorously controlled experiments even in mammals besides birds and other vertebrates.     

SYNERGISTIC EFFECTS BETWEEN BIRCH CHEMICAL MECHANICAL PULPS AND ASPEN BLEACHED KRAFT PULP

INTRODUCTIONIn papermaking, it is very often that more than one type (or grade) of pulps are used to develop paper sheet properties necessary for both machine runnability and requirement from the end users. In many high end paper grades (e.g., various high brightness printing/writing papers), long fiber from softwood bleached kraft pulp traditionally is often used in combination with short fiber from hardwood bleached kraft pulp (HBKP). In this combination, the long fiber component provi…     

方铅矿与黄铁矿浮选分离的矿浆电化学研究Ⅲ．方铅矿与黄铁矿混合精矿的浮选分离

以丁基黄药为捕收剂的方铅矿与黄铁矿混合精矿体系，按照电位与可浮性的关系，两矿物在还原性矿浆电位浮选分离的电位差在热力学上仅为５０ｍＶ，而在动力学上达到了２０７ｍＶ。采用接触角测定、单矿物浮选、混合矿分离等方法，可以证实依据方铅矿表面丁基黄原酸铅和黄铁矿表面丁基双黄药的电化学还原动力学性质的差异，实现方铅矿与黄铁矿混合精矿的电化学浮选分离。     

漂白麦草浆的表面化学特性

对漂白麦草浆（BWAP）各筛分级分的化学组成及表面化学特性进行了分析。结果表明：戊糖含量基本相近，约21％；灰分含量随着网目数的增而增大，P105的灰分含量高出全浆的35％；纤维长度在1.3mm以上的浆料占24％，而长度在0.4mm以下的浆料达40％。每100gBWAP的羧基含量为9．3mmol，明显高出木浆的羧基含量，R105和P105的羧基含量超过全浆。P105的比表面积是全浆的2．34倍，是R28的3．30倍。BWAP的Zeata电位大于化学木浆，除R38电位值较小外，其余级分相差不大。     

竹浆纤维含量及纬密对竹浆纤维/棉织物防紫外线性能的影响

采用HB902型防紫外线透过及防晒保护测试系统,根据GB/T6529—2008和GB/T18830—2009对15种不同规格的棉与竹浆纤维/棉交织面料的防紫外线性能进行了测试,研究了竹浆纤维含量及纬纱密度变化对交织物防紫外线性能的影响.结果表明:在UVB波段的紫外线透过率,竹浆纤维/棉交织物小于纯棉织物;而在UVA波段中340～400 nm的紫外线透过率,竹浆纤维/棉交织物大于纯棉织物;随着纬纱中竹浆纤维含量的增加,中波长紫外线透过率呈现先减小再增加再减小再增加的变化规律,竹浆纤维质量分数为30%时中波长紫外线透过率最小;随着纬纱中竹浆纤维含量的增加,长波长紫外线透过率呈现增加的规律;当经密不变、纬纱中竹浆纤维含量不变时,随着纬密的增大,紫外线透过率减小,织物的防紫外线性能增强.