儿童营养性疾病的矿物质元素测定意义

目的探讨儿童营养性疾病患儿矿物质元素测定的临床意义。方法对683例儿童营养性疾病患儿进行血清矿物质元素测定,并与200例健康体检儿童的检测结果进行比较。结果佝偻病患儿血清钙和血清锌水平低于正常对照组,血铅含量高于正常对照组,差异有显著性意义(P<0.05);营养不良患儿血清铁和锌水平低于正常对照组,差异有显著性意义(P<0.05);营养性贫血患儿血清铁、铜水平低于正常对照组,血铅高于正常对照组,差异有显著性意义(P<0.05)。结论儿童体内矿物质元素含量的异常与营养性疾病的发生密切相关,合理营养、平衡膳食是预防儿童营养性疾病重要措施。     

铁质食品营养强化剂乙二胺四乙酸铁钠的生产方法

正本发明公开了一种铁质食品营养强化剂乙二胺四乙酸铁钠的生产方法,包括原料合成溶解、浓缩、结晶、离心、干燥、粉碎筛分后和包装入库工序,其创新点在于:该生产方法以氧化铁、乙二胺四乙酸和钠盐为原料;所述原料合成溶解步骤为按照氧化铁、乙二胺四乙酸、钠盐的质量比为1:3.5~4.5:0.8~1的比例,向溶解锅中加入水后继续加入氧化铁和乙二胺四乙酸,加热至100℃,加入钠盐,待溶液完全溶解后调节溶液pH值至3.0~6.0。     

EDTA铁钠的制备与应用

本文研究了用FeC13和Na2EDTA、EDTA、NaOH、NaHCO3为原料,制备乙二胺四乙酸铁钠的不同方法,其中用NaHCO3调pH值合成工艺简单,温度低易控制,易过滤,易形成工业化生产,所制得的产品红外光谱图与文献相吻合。本文还介绍了乙二胺四乙酸铁钠在食品、照相、农业、工业、印染等行业的广泛用途。     

食用油中6种矿物质元素的营养风险评价

为了对食用油中矿物质元素的营养价值进行综合比较和评价分析,以17种食用油样品为研究对象,采用微波消解-火焰原子吸收光谱法对食用油所含的6种矿物质元素Ca、Mg、Fe、Zn、Cu、Cr进行了测定,并结合中国居民膳食营养素参考摄入量对18～50岁的一般人群每日从食用油中摄入矿物质元素的量进行分析和风险评估。计算结果表明:17种食用油中均含有丰富的Ca、Mg、Fe、Zn、Cu、Cr矿物质元素。DB值显示:除玉米油、菜籽油、橄榄油之外,其余食用油对女性所需求比例的满足程度略高于男性。经%RNI(AI)、%UL评估结果表明:17种食用油中的矿物质风险指数较低,在食用油的推荐摄入量下矿物质均无过量摄入的风险,进一步验证了人体从17种食用油中摄入矿物质元素的量是安全的。     

综合信息——食品、饮料添加剂 VC用于食品添加剂和食品营养强化剂

随着经济的发展和生活的改善，VC已开始进入食品工业，进入家庭。我国也将VC列入国家食品营养强化剂的使用卫生标准（GB19880-94），允许在水果罐头、果泥、饮料、硬糖，精婴幼儿食品中添加。我国传统的午餐肉罐头，国外要求必须加入VC。一些高档的啤酒为保持澄清和口感，也必须加入VC。这些不仅仅因为VC是营养强化剂，主要是它有较强的还原性，能保护其他物质免于氧化破坏。由于VC具有天然营养动能的特点，因此作为食品添加剂，它有着巨大的发展前景。     

锌与人体健康

人体中已发现的元素有近５０种,其中包括Ｃ、Ｈ、Ｏ、Ｋ、Ｎａ、Ｃａ、Ｍｇ、Ｃｌ等十几种宏量元素和常量元素,还包括多种微量元素,如Ｆｅ、Ｚｎ、Ｍｎ、Ｃｕ、Ｆ、Ｉ等。这些微量元素虽在人体中仅占不到百分之一,但它们在人体中却具有举足轻重的作用,是生命活动所不...     

动物营养用矿物质与其化学性质的关系

本文论述了过渡元素的化学性质与作为动物微量元素营养剂的关系,证实在大多数生理条件下,可产生稳定的螯合物,从而提供了新型鳌合盐添加剂的理论基础。还论述了动物摄入电解质的作用,对于奶牛的缺氯应引起重视。     

乙二胺四乙酸铁钠的制备

研究了用FeC13·6H20和Na2EDTA、EDTA、NaOH、NaHCO3为原料,制备乙二胺四乙酸铁钠的方法,并对不同制法做了分析对比。将乙二胺四乙酸在80℃以上加热溶解,分次加入固体碳酸氢钠和三氯化铁,加完后80℃保温反应20 min,调整溶液pH值小于5,冷却、抽滤、洗涤、干燥即可。此法容易操作,产品质量好。     

经皮渗透促进剂的研究

阐述常用经皮渗透促进剂在透皮制剂方面的应用特点,探讨其发展趋势。从经皮渗透促进剂的分类、影响因素及近年的应用进展等方面进行综述。阐明了不同经皮渗透促进剂的特点。合成和筛选对皮肤的刺激性小、作用力强的新型渗透促进剂,将是今后研究的方向。     

聚乳酸(PLA)用熔体强度增强剂的合成及表征

以丙烯酸酯为单体,采用乳液聚合体系,合成聚乳酸用熔体强度增强剂。通过扫描电子显微镜(SEM)、红外分析(IR)、高效凝胶色谱、转矩流变仪等手段对其结构及性能进行了表征。结果表明:合成的丙烯酸酯类熔体强度增强剂从结构及性能,都与陶氏化学公司产品PARALOID BPMS-265相似。     

熊果苷经皮渗透及促渗透体系的初步研究

利用离体皮肤渗透技术研究了熊果苷的经皮渗透和几种渗透促进剂对其影响。结果表明,涂布量为80mg/cm^2,涂布面积为5cm^2时,熊果苷能经3天龄大鼠表皮和成年小鼠全皮渗透,渗透能力与浓度和作用时间有关。乳化体（霜）中熊果苷的渗透能力约为水溶液的50％,适当 透促进剂可提高能高熊果苷的渗透能力,如含水溶性氮酮的受试霜可提高20％。     

矿物质对生物质热解的影响及其解决方案

通过对一年生和多年生的生物质及其热解油组成的分析,探讨了影响生物质热解油组成及其酸度的重要因素是生物质中的金属盐矿物质,金属盐舍量增加,致使热解油收率降低、酸含量增加。对现有的生物质热解工艺进行了比较和评述,提出了消除金属矿物质影响和含酸少的新型生物质热解工艺。     

人工合成矿物及其应用初探

简要说明了合成矿物的必要性,介绍了合成矿物的主要特征,详细阐述了各种合成矿物在陶瓷和耐火材料等领域中的应用。     

Hemodynamic Forces Regulate Cardiac Regeneration-Responsive Enhancer Activity during Ventricle Regeneration

Cardiac regenerative capacity varies widely among vertebrates. Zebrafish can robustly regenerate injured hearts and are excellent models to study the mechanisms of heart regeneration. Recent studies have shown that enhancers are able to respond to injury and regulate the regeneration process. However, the mechanisms to activate these regeneration-responsive enhancers (RREs) remain poorly understood. Here, we utilized transient and transgenic analysis combined with a larval zebrafish ventricle ablation model to explore the activation and regulation of a representative RRE. lepb-linked enhancer sequence (LEN) directed enhanced green fluorescent protein (EGFP) expression in response to larval ventricle regeneration and such activation was attenuated by hemodynamic force alteration and mechanosensation pathway modulation. Further analysis revealed that Notch signaling influenced the endocardial LEN activity as well as endogenous lepb expression. Altogether, our work has established zebrafish models for rapid characterization of cardiac RREs in vivo and provides novel insights on the regulation of LEN by hemodynamic forces and other signaling pathways during heart regeneration.     

Cyanidation of Gold Associated with Silver Minerals in Sulfide Mineral Matrices

Lead salt stimulated the dissolution of gold when gold associated with silver minerals was interspersed in the silica or in the pyrite‐silica layer. Gold dissolution was likewise promoted through lead addition for chalcopyrite‐silica and the sphalerite‐silica systems. Lead addition did not boost gold dissolution and a recovery of 6.9 % was achieved for gold and silver minerals dispersed in stibnite. Lead pretreatment also enhanced gold recovery except for the stibnite‐silica system. Gold surface‐passivating films were observed for gold associated with silver minerals and stibnite.     

Refractory Minerals in Henan Province

Henan province is very rich in refractory minerals of many varieties including silica,dolomite,graphite,pearlite,sepiolite,olivine,and sillimanite group minerals,besides the abundant reserves of fireclay and bauxite,which lay a good foundation for the development of the refractories industry of the province,The paper introduces the reserves,distribution and character of the refractory minerals in Henan province.     

Minerals in some Australian oil shales

The mineral composition of oil shales from three widely different ateas within Australia has been examined by X-ray diffractometry after low-temperature ashing. Quartz is more abundant than calcite. Feldspar is prominent in the Permian oil-rich shale from Glen Davis, New South Wales. Clay minerals are represented by smectite, illite, kaolinite and mixed-layer minerals (mostly mica-smectite). The content of clay minerals is generally low, except in the Tertiary oil shale from Rundle, Queensland.