双氧化剂制备淀粉粘合剂的研究

介绍利用双氧化剂制备淀粉粘合剂的工艺方法，对影响淀粉粘合剂质量的因素进行了讨论。     

Changes of bioactive compounds and anti‐oxidant activity during cold storage of carrots

Carotenoids, total phenolics and anti‐oxidant activity of carrots were determined during 6 months of storage at 0 °C, 85–90% relative humidity. In addition to changes in CIE colour parameters (L*, a*, b*, h and C), physicochemical properties of carrots including water soluble solids; pH and titratable acidity were evaluated. Cold storage of carrots did not affect the carotenoid levels (β‐carotene, α‐carotene and total carotenoid) except lutein, which showed a 37.5% loss. Total phenolic concentration of carrots decreased significantly (P < 0.05) over the entire storage period. The anti‐oxidant activity of carrots decreased with a level of 31% and was found correlated with total phenolics and lutein content in carrots. While CIE L* and a* parameters decreased significantly (P < 0.05) after 6 months of storage, the b* and C parameters were statistically unchanged for the first 4 months of storage, but decreased gradually for the following period.     

对润滑油中使用的抗氧剂及金属钝化剂的一点认识

润滑油的氧化安定性是其最重要的性质之一，油品可以使用的寿命在很大程度上取决于油品的氧化安定性。研究改善油品的氧化安定性长期以来一直是润滑油生产的重要课题，而采用添加剂是提高其抗氧化性能有效而经济的手段，通过对润滑油抗氧机理的研究可以使润滑油抗氧剂应用更科学。     

Senescence Marker Protein-30 (SMP30) Deficiency Impairs Myocardium-Induced Dilation of Coronary Arterioles Associated with Reactive Oxygen Species

Senescence marker protein-30 (SMP30) decreases with aging. Mice with SMP30 deficiency, a model of aging, have a short lifespan with increased oxidant stress. To elucidate SMP30’s effect on coronary circulation derived from myocytes, we measured the changes in the diameter of isolated coronary arterioles in wild-type (WT) mice exposed to supernatant collected from isolated paced cardiac myocytes from SMP30 KO or WT mice. Pacing increased hydrogen peroxide in myocytes, and hydrogen peroxide was greater in SMP30 KO myocytes compared to WT myocytes. Antimycin enhanced and FCCP (oxidative phosphorylation uncoupler in mitochondria) decreased superoxide production in both groups. Addition of supernatant from stimulated myocytes, either SMP30 KO or WT, caused vasodilation. The degree of the vasodilation response to supernatant was smaller in SMP30 KO mice compared to WT mice. Administration of catalase to arterioles eliminated vasodilation in myocyte supernatant of WT mice and converted vasodilation to vasoconstriction in myocyte supernatant of SMP30 KO mice. This vasoconstriction was eliminated by olmesartan, an angiotensin II receptor antagonist. Thus, SMP30 deficiency combined with oxidant stress increases angiotensin and hydrogen peroxide release from cardiac myocytes. SMP30 plays an important role in the regulation of coronary vascular tone by myocardium.     

利用制药废液提取碱式碳酸锌

讨论了咔唑酮制药废液对环境的污染及危害,比较了不同氧化剂处理制药废液的氧化能力及其效果,研究了次氯酸钠的用量、溶液pH值对碱式碳酸锌产品质量的影响,确定了咔唑酮制药废液处理的方法和提取碱式碳酸锌的工艺流程和控制条件,对于环境保护和废物利用,具有一定的参考价值。     

聚合氯化硫酸铁的合成

以硫酸亚铁为原料，氯气为氧化剂，氢氧化钙和稳定剂为中和剂，当溶液ｐＨ值为１．９０￣２．００，氧化时间为０．５ｈ，铁离子质量浓度为０．０８ｍｏｌ／Ｌ时，可以合成盐基度为５６％的聚合氯化硫酸铁，液收为７５％。     

柴油选择性氧化-萃取脱硫工艺的研究

对柴油选择性氧化－萃取脱硫工艺在实验室进行了探索，初步试验结果表明：以过氧化酸为氧化剂，糖醛为萃取溶剂 ，采用该方法可有效脱险柴油中的硫化物，脱硫率一般在65％－80％。对长岭直馏塔柴油进行处理后硫含量可从1500μg/g降为472μg/g，符合国际燃料对柴油硫含量不大于500μg/g 的要求。同时可降低柴油的芳烃含量及密度，且十六烷值指数有所提高。该工艺有望为我国炼油企业生产清洁柴油提供一条新途径。     

络合法脱除页岩油中碱性氮化物的实验研究

应用酸性复合溶剂络合法脱除抚顺页岩油碱性氮化物.结果表明:在反应温度64℃、反应时间20min、精制剂剂油比0.068∶1、氧化剂剂油比0.03∶1的条件下通过简单的实验方法能够有效地脱除页岩油中的碱性氮化物,碱性氮脱除率为79.31％,油品收率为80.45％.得到精制油可用于加氢精制.     

超声波辅助复合氧化法合成氧化玉米淀粉

以玉米淀粉为原料、以过氧化氢和过硫酸钾为复合氧化剂、以Fe2＋为催化剂,在酸性条件下采用超声波辅助复合氧化法合成氧化玉米淀粉。以淀粉乳浓度、复合氧化剂质量分数（占干淀粉总量,下同）、体系pH值、数控超声波清洗器功率、催化剂质量分数（占干淀粉总量,下同）、反应温度、反应时间为考察因素,以氧化度（羧基含量）作为衡量指标,采用单因素实验和正交实验确定超声波辅助复合氧化法合成氧化玉米淀粉的最佳工艺条件为：淀粉乳浓度30％,复合氧化剂质量分数10％,体系pH值3．OO,数控超声波清洗器功率90w,催化剂质量分数0．3％,反应温度55℃,反应时间40rain,在此条件下,可以制得氧化度为0．203％的氧化玉米淀粉。     

Total Antioxidant,Phenolic Compounds,and Total Oxidant Status of Certified and Uncertified Turkey's Honeys

In this study, total oxidant status (TOS), total antioxidant capacity (TAC), and total phenols (TP) of seventeen certified and eight uncertified honey samples were analyzed. The TAC and TOS of the samples were determined using novel methods. Uncertified honey samples had significantly lower values for their TP, TAC, and TOS contents than those of certified honey samples. There was significant correlation between TOS and TP values (P < 0.01) and between TOS and TAC values (P < 0.05).