琥珀酸酐改性麦草浆对Cd(Ⅱ)的吸附性能

以二甲苯作溶剂、三乙胺作催化剂,通过琥珀酸酐改性麦草浆(WSP),制备出一种新型吸附剂S-WSP。通过红外光谱对S-WSP进行表征结构分析,该酯化反应在异相催化条件下能够顺利进行。S-WSP的羧酸基团与NaOH溶液作用去质子化可成功获得NaS-WSP。NaS-WSP悬浮在水溶液中吸附Cd2+,最大吸附量可达105.7mg/g,其动力学过程遵循伪二级动力学模型。由于在离子交换过程中竞争质子,该吸附剂的吸附能力会随着pH的下降而降低。     

碱法麦草浆木聚糖酶处理后木质素及碳水化合物的变化

采用UV光谱、凝胶色谱、X—射线衍射及扫描电镜等技术对碱法麦草浆的酶解浆和酶解液进行分析,探讨了木聚糖酶对碱法麦草浆处理后浆中木质素和碳水化合物的变化情况。研究认为,木聚糖酶对碱法麦草浆漂白作用主要是因为木聚糖酶降解了浆中部分木聚糖和残余木质素中的LCC结构,从而使后序漂白中漂液更易渗透,木质素的溶出更多、更易。     

环保型缓冲材料在吸顶灯包装设计中的应用

对纸浆模塑和瓦楞纸板的吸顶灯缓冲包装进行了分析比较,通过物流过程模拟,分别对两种包装方案做了跌落试验。并从环保、降低成本以及保护产品的角度出发,采用纸浆模塑对吸顶灯的包装进行了改进设计,其包装方案经过试验测评证明是可行的,成功的。     

微波在植物纤维漂白中的应用研究

采用微波辐射技术，建立了次氯酸钠漂白麦草浆工艺。影响微波辐射漂白纸浆的因素有三项：微波辐射时间、辐射功率和次氯酸钠用量。当微波辐射功率为352w，辐射时间为2min，次氯酸钠用量为10mL时，2g绝干浆的白度达77％ISO以上。此外，通过与水浴的对比实验，发现微波加热2min纸浆达到的白度相当于水浴加热40min，这对于能源的节省是非常有意义的。     

真空吸滤过程影响纸浆模塑制品质量问题的分析

根据实际生产分析了纸浆模塑制品生产工艺过程影响纸浆模塑产品质量问题产生的原因,并总结出解决这些问题的方法,对实际生产具有指导意义.     

麦草浆黑液降粘消除硅干扰的研究

针对麦草浆黑液蒸发难的问题，采用补加烧碱消除硅干扰从而降低粘度的方法改善其蒸发性能。实验结果表明：补加烧碱能降低黑液粘度60％左右，基本上消除了硅干扰。     

Extracting gold from pyrite roster cinder by ultra-fine-grinding and resin-in-pulp

1　ＩＮＴＲＯＤＵＣＴＩＯＮＲｅｓｉｎ ｉｎ ｐｕｌｐｐｒｏｃｅｓｓｉｓａｎａｄｖａｎｃｅｄｔｅｃｈ ｎｉｑｕｅｏｆｅｘｔｒａｃｔｉｎｇ ｇｏｌｄｗｉｔｈｏｕｔｆｉｌｔｅｒ ,ｉｎｗｈｉｃｈｇｏｌｄｉｓｄｉｒｅｃｔｌｙｅｘｔｒａｃｔｅｄｆｒｏｍｃｙａｎｉｄｅｐｕｌｐｗｉｔｈｉｏｎｅｘｃｈａｎｇｅｒｒｅｓｉｎ .Ｉｔａｖｏｉｄｓｌｉｑｕｉｄｓｏｌｉｄｓｅｐａｒａｔｉｏｎ ,ｄｅｃｒｅａｓｅｓｌｏｓｓｏｆｇｏｌｄｉｎｔａｉｌｗａｓｈｉｎｇｓａｎｄｉｎｃｒｅａｓｅｓｔｈｅｒｅｃｏｖｅｒｙｏｆｇｏｌｄ[1,2 ] .353Ｅ…     

造纸配浆自动控制系统的设计与实现

结合了当前造纸行业自动化的要求 ,介绍了纸浆配浆控制系统的设计与实现。系统具有功能强大、界面友好、调试容易、组态方便、运行稳定等优点     

Lymphatic networks in the periodontal tissue and dental pulp as revealed by histochemical study.

The structural organization and fine distribution of the lymphatic networks in the periodontal tissues (gingiva, periodontal membrane, and alveolar process) and dental pulp of animals and humans were reviewed with special reference to histochemical examination by light and electron microscopy. The distinction between lymphatics and blood vessels was made on cryostat sections of undecalcified and calcified teeth treated with EDTA solution and whole mount preparations of periodontal membranes using 5'-nucleotidase (5'-Nase)-alkaline phosphatase (ALPase) double staining. This staining procedure allowed lymphatic vessels in the periodontal tissue and dental pulp to be differentiated from blood vessels. The specificity and localization of the enzyme reactions were confirmed by comparative histochemical studies of the same specimen with light microscopy and scanning or transmission electron microscopy. Well-developed 5'-Nase-positive lymphatic networks were observed on the tissue sections and whole mount preparations of the gingiva, periodontium, and dental pulp. More lymphatic vessels were seen in the root area of the periodontium than in the cervical area. In the dental pulp, lymphatic vessels were more numerous in the central part than in the peripheral odontoblastic layer. These distributions of the lymphatic capillary networks are discussed in relation to their ability to supply lymph to the teeth.