巯基树脂富集硫代米蚩酮光度法测定矿石中的金

研究了矿样分解后,利用巯基树脂富集金,洗脱分离后用硫代米蚩酮光度法测定矿石中的金,取得了较为满意的结果。     

黄金首饰焊接原理与工艺

焊接技术是首饰制作中最基本、最重要的一种工艺,是首饰制作从业者的基本功,也是有关教学的难点。文中从焊接原理入手,结合生产与教学实际,介绍了足金首饰和K金首饰的焊接操作工艺和技术,旨在促进首饰焊接技术的推广。     

C410哌啶树脂吸附和解吸金的性能研究

研究了用C410哌啶树脂从氯水溶液中吸附和解吸金的性能。考察了溶液中含金量、搅拌速度和温度对该树脂吸附金的影响。用3％硫脲溶液能够很好解吸金。实验测得该吸附过程的表观活化能值为17.0kJ/mol。对吸附金前后的树脂分别用红外光谱进行了分析比较。     

D911树脂吸附富集金的性能研究

采用静态法，动态法研究了Ｄ９１１树脂在盐酸介质中吸附，解吸金的性能。     

P510树脂从含金氯化溶液中吸附金和解吸金的性能研究

用静态法研究了PS10树脂从酸性含金氯化溶液中吸附金及其解吸金的性能。考察了吸附时间、酸度、初始金浓度、温度等因素对树脂吸附金的影响,同时考察了解吸时间、解吸剂硫脲浓度对金解吸率的影响。在适宜条件下,PS10树脂对金的吸附率和解吸率均达到99％以上。     

P510树脂在氯化体系中用树脂矿浆法回收金的工艺条件试验研究

试验研究了P510树脂对某含金硫精矿焙砂在氯化体系中用树脂矿浆法提金的工艺条件。在最佳试验条件下,金的浸出吸附率可达96％以上。     

BPR树脂分离富集—碘量法测定地质矿样中微量金

本文提出一种用BPR树脂静态富集—碘量法测定金的方法。本法简单易行、准确迅速,能适用于地质样品中微量金的测定。     

Lifelong management of patients with a single functional ventricle: a protocol

Of the wide variety of congenital heart defects, the single functional ventricle continues to be one of the most enigmatic. Compared with patients who have complex congenital heart defects and 2 functional ventricles, patients with a single functional ventricle have greater surgical and long-term morbidity and mortality, and use more medical resources. Recent investigations have shown that patients with a single functional ventricle often have very satisfactory hemodynamics soon after a modified Fontan repair but then develop dilated cardiomyopathy during the subsequent decade. The cause and pathogenesis of the cardiomyopathy have not yet been determined. Many publications have examined individual aspects of the care of these patients based on retrospective reviews, but very few have provided comprehensive prospective methods for managing patients with a single functional ventricle. We hypothesized that a comprehensive management protocol with regular review of the results would provide a better understanding of the problems encountered in these patients and thus improve long-term outcome. Herein, we present our initial protocol for the lifelong management of patients with a single functional ventricle.     

直接灰吹法测定冶金物料中的金和银

根据冶金物料金泥、银泥、阳极泥产品中的金、银含量高,分析时取样量少的特点,进行了直接包铅灰吹,分金,质量法测定金、银的实验。其实验结果表明,该方法简便、快捷,分析结果准确、可靠。     

萃淋树脂吸附金解脱及再生研究

萃淋树脂在酸性介质中能很好的吸附金，吸附后用硫脲容易解脱并且树脂可以再生重复使用。     

用离子交换树脂从硫脲硫酸溶液中回收金银的研究

本文从树脂选型、吸附和解吸等方面,介绍了用离子交换法从含金量较低的硫脲硫酸溶液中,回收金、银的试验研究结果。结果表明,用D61和732牌号的强酸性阳离子交换树脂,能有效地从料液中吸附金、银;用氰化钠碱性溶液作解吸剂,金的解吸率>99％,银的解吸率>70％。     

碳质金矿中碳质物的物质组成及其与金的相互作用

本文利用广西风山县金牙金矿对碳质金矿中的碳质物进行了研究。探索出从矿石中有效分离各种碳质组分的方法。在碳质物中发现如下的三种物质：（１）活性炭类物质（２）腐殖酸（３）长链酯或长链酯与长链烷烃的混合物。进一步的实验结果表明：产生“劫金”作用的碳质物主要为活性炭类物质,腐殖酸次之,酯或烃类似乎与劫金效应无关。但总的来讲,金牙金矿中碳质物的劫金作用较弱,金滩浸的主要原因不是碳质物对金的吸附,而强能是金的     

泡沫塑料吸附原子吸收光谱法、氢醌滴定法及吸光光度法测定金

本文提出以泡沫塑料吸附金，对泡沫塑料处理后，可采用原子吸收光谱法、氢醌滴定法、分光光度法测定金。     

D-290大孔阴离子交换树脂吸附金的机理和应用

本文报道了D—290大孔强碱性阴离子交换树脂吸附金的机理、酸度曲线、吸附速率、平衡时吸附的容量及吸附反应活化能。通过柱色谱试验,拟定了用D—290树脂分离、原子吸收法测定阳极泥中微量金的方法,取得较好结果。     

模板电沉积法制备一维金亚微米棒、纳米线阵列的研究

通过采用不同类型的无机多孔膜作为模板以及恒电位模板电沉积法在一层厚度为300nm的碳膜上制备出一维金亚微米棒、纳米线及其阵列,并利用扫描电镜（SEM）、透射电镜（TEM）、X射线衍射（XRD）、能量分散谱（EDS）表征了该一维金亚微米棒、纳米线阵列的化学组成、结构和形貌。研究结果表明,采用多孔三氧化二铝膜作为模板,可以得到长度为5μm的一维金亚微米棒（直径200nm）阵列;采用无机复合介孔膜为模板,则得到一维金纳米线（3～4nm）阵列,并通过控制沉积时间,可以调节纳米线的长度（400nm～3μm）。     

Specific tolerance induction and transplantation: a single-day protocol

Bone marrow transfusion is a well-established method for induction of mixed hematopoietic chimerism and donor-specific tolerance in animal models. This procedure, however, is inapplicable in clinical transplantation using cadaveric donors due to the interval (1 week to 7 months) between tolerance induction and organ transplantation. For clinical use, it is essential that allografts be placed at the time of bone marrow transfusion. In the present study, we performed skin transplantation within 1 hour after a nonlethal conditioning regimen. Recipient mice were treated with anti-CD3, anti-CD4, low-dose total body irradiation (3 to 6 Gy TBI) and fully mismatched or haploidentical donor bone marrow cells. Stable multilineage chimerism and specific T-cell nonresponsiveness developed. Donor skin grafts were permanently accepted. These results suggest that this single day protocol has clear potential for application in both cadaveric and living-related organ transplantation.     

Optimizing form and function with the direct posterior composite resin: a case report

The human testis determining factor (SRY) has been cloned from the Y chromosome. This gene is a dominant inducer of male differentiation. Mutations in the SRY gene result in an XY individual developing as a sex reversed phenotypic female. Sex reversal in humans can also be caused by mutations located in autosomal or X-linked loci. One such sex-reversing locus (SRAI) is associated with the developmental disorder campomelic dysplasia (CD). Both these syndromes were mapped to human chromosome 17q by the identification of balanced reciprocal translocations in five unrelated patients. The translocation breakpoint of one such XY-female CD patient was mapped and the region surrounding it cloned. The closest distal marker used to map the translocation breakpoint was the SOX9 gene. Because of the close proximity of this gene to the breakpoint, it was subjected to mutation analysis in patients without overt chromosome rearrangements. Analysis of DNA from these patients and their parents identified de novo mutations in the SOX9 gene in patients with both autosomal sex reversal and CD. This showed that mutations in the SOX9 gene are responsible for both syndromes.     

Scanning electron microscopic evaluation of two compaction techniques using a composite resin as a root canal filling material

The canals of 20 human dental roots were instrumented using a a step- back technique. The smear layer was removed, and the canals were obturated with composite resin. Two different techniques of compaction were used: either vertical or lateral motions were used to condense composite resin inside the root canal that was then photopolymerized layer by layer using the argon laser (488 nm). The beam was delivered into the root canal by means of an optical fiber 320 micrometers in diameter. Longitudinal and cross-sections of the samples and resin replicas of the root canals were examined using a light and scanning electron microscope. Scanning electron microscopic examination revealed that laterally compacted resin fillings showed fewer voids than those obtained by vertical compaction. In both experimental groups, adhesion of the resin to the dentin walls, pulled-out resin tags, microfailure, and resin fracture, leaving a layer of resin associated with the wall surface were observed.