反渗透系统的设计思路探讨

反渗透作为一种重要的水处理技术,越来越广泛地应用到各种领域,其处理水源也变得复杂多样化,因此要求在反渗透系统和反渗透预处理设计时予以高度关注。本文主要讨论针对不同水源时反渗透系统的设计思路。     

Therapeutic applications of bone marrow-derived stem cells in liver transplantation for end-stage liver diseases

Today, liver transplantation (LT) is the only established treatment for end-stage liver diseases. The de- velopment of LT, including OLT, cadaveric LT, split LT, living donor LT (LDLT), brings hopes to patients with these diseases. However, increasing donor shortage, rejection and life-long immunosuppression with its side effects are the major limitations of this therapy strategy. Bone marrow-derived stem cells (BMDSCs) are capable of differentiating into hepatocyte-like cells and contribute to liver injury repair. The microenvironment of liver injury caused by rejection, ischemia/reperfusion, loss of liver mass, recurrence of HCV and "small-for-size syndrome" after LT can attract a variety of bone marrow-derived stem cell population to the peripheral circulation and then migration to the injury liver to promote the hepatic function restoration. Additionally, BMDSCs can also take part in the functional regeneration of living donor liver after LDLT. This participation in liver regeneration may be associated to the interac- tion between SDF-1and its receptor CXCR4, involving HGF, IL-8, MMP9, and VEGF/VEGFR-2. BMDSC with its bio-characteristics could maintain the allograft tolerance from different angles and in different ways. In conclusion, BMDSCs transplantation, as a new assistant therapeutic method for LT, will ex- pand the space of LT, and provide more survival opportunities for the patients suffering liver diseases in the future.     

浅析供热计量收费计算原理与方法

介绍了热量计量的基本原理和热费确定的基本原则,阐述了供热总费用的构成与计算原理以及用户热费的构成与计算原理。     

合金铸铁激光处理的探讨——Ⅱ.激光辐照工艺参数的控制

用热传导方程控制激光辐照温度,建立了一种新回归方程以控制激光辐照硬化深度,选用卡尔丹公式列热传导方程及同归方程联立求解,可得到同时满足一定的硬化深度及表面最高温度双重要求的工艺参数,此种方法可作为激光硬化处理工艺参数的控制或预报,对本合金铸铁的激光硬化处理,其表面温度的下限应大于其熔点温度,即以表面产生微熔的快速冷凝处理为宜,并以选取低功率慢扫描为最佳。     

关于树的逆对偶度一个猜想的证明

关于树的逆对偶度有下列猜想:Ivd≥R,本文证明,当R>0时,Ivd≥R+1/3     

叶绿素衍生物CPD4在人血清中的吸收光谱

研究了不同浓度（１０、５０μｇ／ｍｌ）的叶绿素衍生物４号（ＣＰＤ４）在含１０％不同血清人血清（分Ａ、Ｂ、Ｏ型三种）生理盐水中以及纯蒸馏水中的吸收光谱，并对结果进行了分析和比较，该工作对ＣＰＤ４在ＰＤＴ临床上的应用具有一定的意义。．     

SrFCl:Eu~(2+)晶体的电子自旋共振谱研究

用程序降温法生长了SrFCl:Eu~(2+)晶体,并测量了它的电子自旋共振谱。应用最小二乘法拟合技术对g因子及自旋哈密顿参数进行了精确拟合。报道了各向异性的g因子及有关自旋哈密顿参量。发现并归属了Eu~(2+)的高阶禁阻跃迁。     

Lipschitz条件题设的完善

本文给出了函数单侧极值点的定义,并证明了连续函数的单侧极值点所成之集与实数集等势,且利用此完善了函数满足Lipschitz 条件的题设。     

超微粒MnO_2的合成

以MnCl_2和NaOH为原料,采用胶溶法,制备了超微粒MnO_2制得的MnO_2超微粒为非晶态,直径6.0～10.0 nm,呈球状,在有机溶剂中具有良好的分散性和透明性,考察了影响氧化锰溶胶调制的因素,获得了最佳制胶条件,研究了表面活性剂用量与Mn迁移率的关系;通过X-光粉末衍射、红外光谱、热重及差热分析,研究了产品的结构性能。     

彩色珠光粉的研制

本文探讨了以有机染料为着色剂合成彩色珠光粉的合成方法,并对金属氢氧化物吸附量、有机染料用量、搅拌时间及 pH 值等影响产品性能的因素进行了讨论.