淀粉废水高温厌氧酸化特性(英文)

研究了高温(55℃)升流式厌氧污泥床反应器对人工淀粉废水(COD=1000～10000mg·L-1)的酸化分解过程,揭示了高温厌氧条件下,淀粉生成有机挥发酸的转化规律和组成结构.在试验条件范围内,投配单位有机负荷形成的挥发酸产率约为常数,出水中挥发酸的组成与有机负荷相关,醋酸始终是挥发酸的主要成分.当COD负荷在17.55g·L-1·d-1以下时,丙酸生成量占第二位,但是当COD负荷超过18.38g·L-1·d-1时,丙酸的生成量下降,丁酸的生成量迅速上升.试验结果表明,用高温升流式厌氧污泥床反应器处理碱性(pH=10～11)淀粉废水,水解和酸化效率高,有机负荷大,水力停留时间短,且反应器运行稳定,无明显的污泥颗粒流失现象.     

直接进样法测定植物油中的脂肪酸

对植物油不经衍生化直接进样对脂肪酸进行测定 ,采用毛细管气相色谱法分析植物油中的脂肪酸成分和含量 ,其灵敏度比 GC(普通填充柱气相色谱法 )提高了 1 0 2～ 1 0 3倍     

Simultaneous detection of seven phenolic acids in Danshen injection using HPLC with ultraviolet detector

A high-performance liquid chromatographic (HPLC) method with ultraviolet (UV) detector had been developed for simultaneous quantification of danshensu, protocatechuie aldehyde, caffeic acid, salvianolic acid D, rosmarinic acid, salvianolic acid B and salvianolic acid A in Danshen injection. According to the UV spectra of these components, three detection wavelengths have been selected as follows: 280 nm for danshensu and protocatechuic aldehyde, 326 nm for caffeic acid, salvianolic acid D and rosmarinic acid, 286 nm for salvianolic acid B and salvianolic acid A. The limit of detection (LOD) was improved to be in the range of 0.008～0.160 μg/ml. Moreover, excellent linear behavior over the investigated concentration range was observed, with R>0.999 for all the analytes.     

强弱酸混合液PH计算新方法

本文应用解析法以质子等衡式为依据,先分别算出强,弱酸的酸度,再用加合公式把它们加合起来,以算出混酸溶液的PH,该法比原有方法简便,适用性广,算出的结果也较准确。     

九州虫草与冬虫夏草、蛹虫草氨基酸成分比较

研究了九州虫草有效部位的氨基酸组成,并与冬虫夏草及蛹虫草进行了比较.测定结果表明所测样品中分别含有16-18种氨基酸,必需氨基酸含量都较丰富,分别占每种样品氨基酸总量的66.93%、34.48%、46.18%、46.62%、38.96%、37.38%.结果表明九州虫草无论是菌丝体还是子座,在氨基酸方面具有较高的营养价值和药用保健价值.     

气相色谱法测定花生油掺伪的方法研究

用气相色谱法测定了花生油和一些常见植物油的脂肪酸组成及其含量,使用添加法在花生油中掺入不同种类、不同浓度的植物油,并进行了相关分析.发现油中脂肪酸组成及其特征组分的变化成线性规律,由此做出工作曲线,可快速定性、定量掺伪油,且掺伪量的最低检出限可达到5%.     

组氨酸与锌(Ⅱ)配合物标准生成焓的溶解量热法测定

合成了组氨酸锌(Ⅱ)配合物Zn(His)SO_4·H_2O(s),用溶解量热法测定了反应物和产物在298.2k条件下分别溶解在2mol/LH_2SO_4溶液中的溶解焓,根据Hess定律和所设计的热化学循环计算出配合反应焓变△_rH_m~θ=9.371±0.073kJ.mol~(-1),进而求出配合物Zn(His)SO_4·H_2O(s)的标准生成焓△_fH_m~θ=[Zn(His)SO_4·H_2O(s)]=-1788.72±1.560kJ.mol~(-1)。     

含聚醚侧链聚羧酸分散剂的制备及其对SiO_2分散性能的研究

采用马来酸聚乙二醇(200)单甲醚单酯(MA-PEO)与丙烯酸(AA)共聚制备了一种含聚醚侧链聚羧酸分散剂(PAMA),研究了该分散剂对SiO2微粉分散稳定性能,并与聚丙烯酸钠(PAANa)、聚乙二醇(PEG4000)进行对比,分析了PAMA分散剂的分散机理.结果表明:该分散剂的分散稳定效果优于PAANa、PEG4000分散剂的分散稳定效果.     

葡萄果肉和葡萄皮有机酸含量的高效液相法测定

采用Hibar column RT250mm×4.6mm,5μm色谱柱,以磷酸盐缓冲溶液(pH=2.5)为流动相,流速1mL/min,检测波长214nm,柱温30度.建立葡萄果肉和葡萄皮中富马酸、酒石酸、柠檬酸、苹果酸等有机酸的高效液相色谱分析方法.其中富马酸、酒石酸、柠檬酸和苹果酸的线性范围分别为0.1～100 mg/L、5～600 mg/L、15～1500 mg/L、10～1000 mg/L;回收率分别为119.3、89.2、99.4、101.6;检出限分别为0.000625mg/L、0.1 mg/L、0.2mg/L、0.1 mg/L.     

X-linked adreno leukodistrophy: Profiles of very long chain fatty acids in plasma and fibroblasts in eigth Serbian patients

X-linked adrenoleukodistrophy is a severe neurodegenerative disorder with impaired very long chain fatty acid metabolism. The disease associated ABCD1 gene encodes a peroxisomal membrane protein which belongs to the superfamily of ATP-binding cassette transporters. We investigated eight male X-ALD patients diagnosed among 142 suspected patients referred for investigation. Plasma levels of very long chain fatty acids were measured at our laboratory using capillary gas chromatography. Eight cases of childhood X-ALD were diagnosed. This is the first published series of Serbian patients with X-ALD. In addition, diagnosis identifies carriers, which could be benefit for genetic counselling and prenatal diagnosis.