Keggin型钼钒磷杂多酸催化H_2O_2氧化蒽制备蒽醌

实验制备了三种Keggin型钼钒磷杂多酸催化剂,并将其应用于催化H2O2氧化蒽制备蒽醌,考察了各种因素对蒽醌产率的影响,以H5PMo10V2O40为催化剂,催化H2O2氧化蒽制蒽醌的最佳条件为:正丁醇为溶剂,催化剂用量为反应物的6%,蒽:H2O2物质的量比为1:16,反应温度70℃,反应时间2h,产率可达90%以上.     

过氧化氢氧化苯甲醛合成苯甲酸的研究

在无溶剂、无相转移催化剂条件下,以过渡金属离子作为催化剂,碳酸钠作为碱性添加物,30%过氧化氢作为氧源,在常温搅拌下来催化氧化苯甲醛制备苯甲酸.最佳实验条件为:n(苯甲醛),n(碳酸钠)/n(催化剂),n(过氧化氢)为100:3:0.5:196,反应时间为1h,苯甲酸产率达84.2%.     

壳聚糖-对羟基苯甲酸膜对Cu~（2＋）的吸附性能研究

采用直径约60mm的壳聚糖-对羟基苯甲酸膜对Cu2＋的吸附进行了研究,结果表明：吸附量随着振荡时间、pH值、温度、Cu2＋初始浓度的增加而增大。对实验数据运用相关数学模型拟合,显示等温吸附平衡符合Freundlich模型,吸附过程动力学更符合二级反应。     

固体酸SO4^2-/SnO2催化合成邻苯二甲酸二异辛酯的性能研究

以邻苯二甲酸酐、正辛醇为原料,采用自制的固体酸SO42-/SnO2为催化剂,合成邻苯二甲酸二异辛酯（DI-OP）,通过实验分别考察浸泡硫酸浓度、颗粒度、活化温度、活化时间等因素对催化剂活性的影响.实验表明：在固体酸SO42-/SnO2催化DIOP的合成中,其最佳工艺操作条件是：浸泡硫酸浓度1.2 mol/L、颗粒度120目、活化温度525℃、活化时间4 h,其酯化产率可达96%以上.固体酸SO42-/SnO2作为该反应的催化剂具有催化活性高、寿命长、可多次重复使用、产物易纯化分离、且产品色泽浅等优点,可望代替传统浓硫酸作催化剂用于DIOP的合成.     

俄罗斯海参脂肪酸的气相色谱-质谱分析

为了解俄罗斯海参中脂肪酸的种类及组成,采用Bligh-Dyer提取法对样品中脂肪油进行提取,甲酯化后利用气相色谱-质谱联用仪进行分析测定．鉴定结果发现俄罗斯海参中含有25种脂肪酸,其中饱和脂肪酸8种,相对百分含量为22．45％;不饱和脂肪酸为17种,相对百分含量为77．53％,其中EPA和DHA的相对百分含量分别为9．46％和11．77％．     

GC-MS法对糖李子籽中脂肪酸成分分析

对糖李子籽的脂肪酸组成和含量进行了分析测定．利用索氏提取法对果籽中的脂肪油进行提取,以KOH-CH3 OH溶液将脂肪油中的脂肪酸甲酯化,经气相色谱-质谱联用仪进行测定并分析．结果表明：糖李子籽中不饱和脂肪酸含量丰富,其亚油酸的相对百分含量为88．20％,极具开发利用价值．     

腹腔注射丁酸盐对大鼠乙酸性结肠炎的预防作用(英文)

目的:探索腹腔注射丁酸盐对防止乙酸性结肠炎的疗效。创新点:首次对大鼠进行腹腔注射丁酸盐,通过与直肠灌注和口服比较,探索三种不同给药方式对预防乙酸性结肠炎的疗效差异。方法:以40只Wistar大鼠为实验对象,分组进行连续7天的腹腔注射、直肠灌注和口服100 mg/kg丁酸钠(SB),第8天进行乙酸(AA)直肠灌注,48小时后处死。记录实验大鼠的临床症状,包括体重减少、腹泻、便血等。对结肠切片进行组织病理学观察,最后对试验数据进行统计分析。结论:腹腔注射、直肠灌注和口服丁酸盐均能明显缓解大鼠乙酸性结肠炎的炎症,其中以腹腔注射疗效最佳。     

Leaf and root glucosinolate profiles of Chinese cabbage (Brassica rapa ssp. pekinensis) as a systemic response to methyl jasmonate and salicylic acid elicitation

Glucosinolates (GSs) are an important group of defensive phytochemicals mainly found in Brassicaceae. Plant hormones jasmonic acid (JA) and salicylic acid (SA) are major regulators of plant response to pathogen attack. However, there is little information about the interactive effect of both elicitors on inducing GS biosynthesis in Chinese cabbage (Brassica rapa ssp. pekinensis). In this study, we applied different concentrations of methyl jasmonate (MeJA) and/or SA onto the leaf and root of Chinese cabbage to investigate the time-course interactive profiles of GSs. Regardless of the site of the elicitation and the concentrations of the elicitors, the roots accumulated much more GSs and were more sensitive and more rapidly responsive to the elicitors than leaves. Irrespective of the elicitation site, MeJA had a greater inducing and longer lasting effect on GS accumulation than SA. All three components of indole GS (IGS) were detected along with aliphatic and aromatic GSs. However, IGS was a major component of total GSs that accumulated rapidly in both root and leaf tissues in response to MeJA and SA elicitation. Neoglucobrassicin (neoGBC) did not respond to SA but to MeJA in leaf tissue, while it responded to both SA and MeJA in root tissue. Conversion of glucobrassicin (GBC) to neoGBC occurred at a steady rate over 3 d of elicitation. Increased accumulation of 4-methoxy glucobrassicin (4-MGBC) occurred only in the root irrespective of the type of elicitors and the site of elicitation. Thus, accumulation of IGS is a major metabolic hallmark of SA- and MeJA-mediated systemic response systems. SA exerted an antagonistic effect on the MeJA-induced root GSs irrespective of the site of elicitation. However, SA showed synergistic and antagonistic effects on the MeJA-induced leaf GSs when roots and leaves are elicitated for 3 d, respectively.     

Detection of Bone Metastases in Breast Cancer (BC) Patients by Serum Tartrate-Resistant Acid Phosphatase 5b (TRACP 5b), a Bone Resorption Marker and Serum Alkaline Phosphatase (ALP), a Bone Formation Marker,in Lieu of Whole Body Skeletal Scintigraphy with Technetium99m MDP

Bone metastases are a serious problem in patients with advanced cancer disease and their presence usually signifies serious morbidity prior to the patient’s death. In breast cancer patients the incidence of bone metastasis is observed to be very high at 70 %, as seen during post-mortem examination. Bone metastasis is difficult to diagnose, treat or follow clinically without radiological tools. This study was designed to evaluate the utility of a novel bone resorption marker–serum tartrate-resistant acid phosphatase 5b (TRACP5b) and the bone formation marker such as serum total alkaline phosphatase (ALP), in comparison with whole body skeletal scintigraphy with Technetium99m MDP for the diagnosis of bone metastases (BM) in breast cancer (BC) patients. This study is intended to help the clinician to diagnose bone metastasis without resorting to radiological tools, as they are not cost effective and carry the risk of radiation. Experimental design: Four groups of samples were analysed. 1st group consists 52 normal female (cancer free women), 2nd group consists 38 BC patients without bone metastasis, 3rd group consists 27 breast cancer patients with limited bone metastasis (3 or less than 3 skeletal lesions) and 4th group consists 35 breast cancer patients with extensive bone metastasis (4 or more than 4 skeletal lesions), conformed by whole body skeletal scintigraphy with Technetium99m MDP. One way ANOVA was used to compare serum TRACP5b and serum ALP among these groups. Both serum TRACP5b and serum ALP are not markedly elevated in limited bone metastasis but are strongly elevated in extensive bone metastasis (p < 0.0001). As seen in this study the biochemical bone resorption marker, serum TRACP5b, abnormally increased in extensive bone metastasis of breast cancer patients and can be used as a specific marker for bone metastasis in lieu of radiological tools.     

聚丙烯酸吸水树脂的反相悬浮聚合研究

环己烷为连续相，水为分散相，采用反相悬浮聚合法合成了聚丙烯酸高吸水性树脂，研究了碱用量，引发剂用量，交联剂用量及温度等反应条件对树脂物理状态和吸水性能的影响，制得吸水树脂最高可吸水850mL/g，吸0．9％NaCl溶液120mL/g。