杨木化机浆使用荧光增白剂的增白性能研究

对比了液体荧光增白剂（OBA）及固体荧光增白剂（VBL）对杨木化机浆的增白效果,研究了表面喷淋及浆内添加荧光增白剂的增白效果。结果显示,OBA对杨木化机浆的增白效果明显好于VBL的;表面喷淋荧光增白剂的增白效果优于浆内添加的;OBA对染色和返黄后杨木化机浆的增白效果不同,表面喷淋0.5%的OBA,染色后白度75.8%的杨木BCTMP的白度提高11.2个百分点,白度达87.0%,与未染色的杨木BCTMP相比,增白后两者的白度仅相差0.7个百分点,而白度为75.1%的返黄杨木BCTMP的白度只增加4.2个百分点,白度为79.3%。     

蓝桉碱性过氧化氢化机浆的研制

当化机浆与化学浆配抄纸页时，成纸白度主要受化机浆白度的影响，化机浆占的比例越大影响也越大，提高化机浆白度可大大提高配抄纸浆的白度，因此生产高白度化机浆具有十分重要的意义。碱性过氧化氢化机浆（APMP）是90年代发展起来的一种新型制浆方法，该法具有得率高、白度高、纸张强度高、制浆污染少、流程简单、投资省等特点，是当今最有竞争力的制浆方法之一。本文拟就我国南方大面积种植的速生树种──蓝桉为原料进行APMP制浆的研究，以提出合理的工艺条件来。1实验1．1原料6年生蓝桉（E．globulus）经削片后晒干储存。原料的化学…     

颇具发展潜力的BCTMP

由于阔叶木BCTMP浆具有印刷适性好、得率高．亮度与松厚度及光散射性组合理想等特点,成为目前我国市场颇具发展潜力的浆种之一。其发展趋势是从商品浆厂单纯追求高松厚度和高白度,转向在制浆造纸一体化工厂为特定的纸种而优化BCTMP工艺和浆料特性。山东华泰．晨鸣．博汇相继建成了年产10万吨、25万吨、20万吨阔叶木BCTMP生产线,且三家均计划近期再上第二条线。这三家企业都选用了美卓制浆造纸的制浆磨浆系统。日前本刊记者到华泰集团BCTMP车间进行了实地考查。     

提高化机浆过氧化氢漂白效率的途径

化机浆由于保留了大部分的木素，在不透明度、松厚度、印刷性能等方面，具有制造高级印刷纸的特性。一般来漂的化机浆白度都较低（＜55％，腮O），如何在较经济条件下使化机浆经过漂白达到高白度，成为人们一直所期望的目标。在总结已有研究的基础上。加上自己的漂白实践，提出了提高化机浆过氧化氢（H刃。）漂白效率进行高白度化机浆漂白的途径，供同行参考。提高化机浆H刀。漂白效率的途径，主要采用合理的组合漂白工艺，高效率地资合金属离子，分离溶出树脂，并活化浆中与H刀。反应的发色基团，使H刃。漂白过程在尽可能少分解的条件下…     

阔叶木BCTMP--提高松厚度、平滑度和不透明度

BCTMP(漂白化学热磨机械浆)工艺是制浆工业一项比较新的技术。它始于20世纪70年代，在80年代末和90年代初有几个阔叶木CTMP工厂开始运转这是由于化学浆价格高，加之BCTMP工艺得到_r进一步发展的原因。这些工厂中的大多数都生产高白度、高强度杨木BCTMP来取代印刷书写纸中的阔叶木硫酸盐浆。     

金属离子对麦草化机浆白度及可漂性的影响

从工艺和机理两方面研究了金属离子对麦草磺化化机浆白度及可漂性的影响。研究结果表明，金属离子对麦草化机浆漂后纸浆白度有一定的影响。表现在一是使纸浆漂后白度降低，二是增加了Ｈ２Ｏ２的无效分解。对于Ｆｅ３＋、Ｍｎ２＋、Ｃｕ２＋而言，Ｍｎ２＋对麦草磺化化机浆的Ｈ２Ｏ２漂白影响最大，其次是Ｆｅ３＋和Ｃｕ２＋；ＤＴＰＡ和ＥＤＴＡ都能较好地去除麦草化机浆中的金属离子；对金属离子含量变化及Ｈ２Ｏ２漂白工艺实验结果表明，麦草化机浆中的金属离子并不是构成麦草化机浆难漂性的主要原因。     

全棉秆高白度化机浆的制备及其应用

对高白度全棉秆化机浆的制备方法进行了研究,全棉秆碱性过氧化氢化学机械法(APMP)制浆前段采用草酸钠脱果胶预处理代替热水浸泡处理,可以有效提高纸浆的白度(白度达到73.32%ISO),改善纸浆的物理性能。同时,对全棉秆化机浆代替杨木化机浆配抄轻型纸的可行性进行了分析。     

BCTMP的未来

BCTMP在世界制浆造纸生产能力中仍然占有很大部分,尤其是现在欧洲正日益扩大其影响。 　　BCTMP在此定义为：用温和的化学品浸渍,经精磨,漂白后的高得率浆 (得率高于 85％ )。用针叶木白度约 80％,用阔叶木白度约 85％。这篇文章的目的在于,要确认碱性过氧化物浆 (APP)是有销路的。事实上 ,APP与 BCTMP竞争于同一市场,并有相似的质量。 APP与 BCTMP不同的是用碱性过氧化物代替亚硫酸钠浸渍木片,用常压磨浆代替压力磨浆。 　　10年前,漂白化学热磨机械浆 (BCTMP)在北美市场进入了全盛时期,这个特殊品种的市场消耗量增…     

华泰一研究成果荣获中国林业产业创新奖

正日前,在上海举办的2014中国国际浆周上,华泰纸业高填低能耗铜版纸生产技术研发成果获得2012~2013年度中国林业产业创新奖(林浆纸类)一等奖。该项目以针叶木化学浆和阔叶木化机浆为主要原料,采用先进的酶法打浆、高填、强热风干燥等技术生产了高填低能耗铜版纸。项目主要研究内容包括:混合阔叶材BCTMP对成浆性能的影响、BCTMP在涂布印刷纸中的配抄、纸浆的酶促打浆工艺、玉米原淀粉酶转化在表面施     

晨鸣集团推出“高得率、高白度、高强度化机浆技术”及“高档彩色胶印新闻纸”

<正>晨鸣集团"高得率、高白度、高强度化机浆技术开发及其在高档涂布纸中的应用"项目于2009年12月17日通过鉴定验收。该项目技术成果"高得率、高白度、高强度化机浆技术"有效提高了杨木和桉木     

常用消毒灭菌法及其机理与应用

介绍了采用消毒灭菌方法,有加热消毒法,紫外线辐射法和化学药剂消毒法。常用化学药剂有醛类、含氯消毒剂、醇类消毒剂以及高锰酸钾、生石灰等,阐释了消毒与灭菌两个概念的区别。     

Probiotics and prebiotics--perspectives and challenges

Owing to their health benefits, probiotics and prebiotics are nowadays widely used in yogurts and fermented milks, which are leader products of functional foods worldwide. The world market for functional foods has grown rapidly in the last three decades, with an estimated size in 2003 of ca US$ 33 billion, while the European market estimation exceeded US$ 2 billion in the same year. However, the production of probiotics and prebiotics at industrial scale faces several challenges, including the search for economical and abundant raw materials for prebiotic production, the low-cost production of probiotics and the improvement of probiotic viability after storage or during the manufacturing process of the functional food. In this review, functional foods based on probiotics and prebiotics are introduced as a key biotechnological field with tremendous potential for innovation. A concise state of the art addressing the fundamentals and challenges for the development of new probiotic- and prebiotic-based foods is presented, the niches for future research being clearly identified and discussed.     

益生素、益生菌与结肠癌

介绍了益生素和益生菌及其作用机理。在动物模型中，有大量的数据证实益生素和益生菌能够预防癌症．而在人体内还没有直接实验证据。它们抑制癌症的确切机理目前尚不清楚，其抑制机理可能是：肠道菌群代谢活动的改变，肠道理化环境的改变，潜在的致癌物质的黏附和降解，肠道菌群的改变、抗癌或抗诱变物质的形成、提高宿主的免疫应答、影响宿主的生理活动以及发酵不能被消化的食物并形成有益代谢产物。     

节能节水型印染助剂和设备的现状

从节能、节水、缩短工艺流程和环保的角度出发，介绍了国内外研制开发的一系列新型节能、节水型印染助剂和染整设备。     

毛霉型低盐速成豆豉工业化生产工艺与设备

本文介绍了毛霉型低盐速成豆豉的工业化生产工艺及生产线的关键设备。     

European citizen and consumer attitudes and preferences regarding beef and pork

This paper presents the combined mid-term findings of the consumer research components of two EU Sixth Framework Programme integrated projects concerning meat, ProSafeBeef and Q-PorkChains. The consumer pillar of ProSafeBeef carried out eight focus group discussions in May 2008, in France, Germany, Spain and the UK. Q-PorkChains conducted a large-scale, web-based, consumer survey in January 2008 in Belgium, Denmark, Germany, Greece and Poland. The first project provides a set of qualitative data from a small cohort of focus groups and the second a set of quantitative data from a larger consumer sample. This paper draws together the main findings of both projects and provides a comprehensive overview of European citizens’ and consumers’ attitudes towards and preferences regarding beef and pork. In general, consumers consider meat to be a healthy and important component of the diet. Consumers support the development of technologies that can improve the health attributes of meat products and guarantee eating quality, but they have a negative view of what they see to be excessive manipulation and lack of naturalness in the production and processing of beef products. In the Q-PorkChains study consumer and citizen segments are identified and profiled. Consumer segments were built upon the frequency and variety of pork consumption. The citizen segments were built upon their attitudes towards pig production systems. Overall, the relationship between individuals’ views as citizens and their behaviour as consumers was found to be quite weak and did not appear to greatly or systematically influence meat-buying habits. Future studies in both projects will concentrate on consumers’ acceptance of innovative meat product concepts and products, with the aim of boosting consumer trust and invigorating the European beef and pork industries.     

Heritability and correlations for body condition score and dairy form within and across lactation and age

The objectives of the current study were to investigate the relationship between body condition score (BCS) and dairy form and changes in genetic parameters for BCS and dairy form within and across lactations and age. Body condition score and dairy form were obtained from the Holstein Association USA, Inc. Records were edited to include those cows classified between 24 and 60 mo of age and between 0 and 335 d in milk (DIM). A minimum of 20 daughters per sire and 15 cows per herd-classification visit were required. The dataset consisted of 135,178 records from 119,215 cows. Repeatability, multiple trait, and random regression models were used to analyze the data. All models included fixed effects for herd-classification visit, age within lactations 1, 2, and 3 or higher, and 5th-order polynomials for DIM. Random effects included sire and permanent environment for all models. Random regression models included age at classification nested within sire or DIM and lactation number nested within sire. Genetic variance for both BCS and dairy form was lowest in early lactation and highest in midlactation. Genetic correlations within and across lactations were high. The genetic correlation between DIM 0 in lactation 1 and DIM 305 in lactation 3 was estimated to be 0.77 for BCS and 0.60 for dairy form. The genetic correlation estimate between 30 mo of age at classification and 50 mo of age at classification was 0.94 for both dairy form and BCS. The repeatability models appeared to generate accurate evaluations for BCS or dairy form at all ages and stages of lactation.     

原花色素及其开发应用

对原花色素的结构、化学特性、制备、分析方法、应用前景作一综述,并重点讨论其生理功能,为在功能性食品、药物、化妆品等领域的深入研究和开发提供参考。     

组学技术与果蔬采后质量和安全控制

果蔬可以提供营养, 有利于人类健康, 而果蔬的后熟及其与环境的相互作用会影响果蔬采后的质量和安全。对果蔬生物学过程的了解和掌握是减少果蔬采后损失和保障果蔬采后质量和安全的关键。在过去的10多年, 基于组学技术的系统生物学在了解果蔬后熟及其与环境相互作用的分子机制方面得到了越来越多的应用。本文对此做了细致的总结, 指出了存在的不足, 并提出了未来的发展方向。     

天然香精香料与生物技术

天然香精香料是高价值的精细化工产品和食品添加剂,但原料来源有限且提取成本高。利用生物技术生产这类产品具有广阔的前景。简述了发酵工程、酶工程、细胞工程和基因工程在香精香料中的应用,并探讨了生物技术在香精香料中的应用前景。