Photoassisted degradation of azodyes over FeOxH2x-3/Fe0 in the presence of H2O2 at neutral pH values

Fe0 was calcined in air at 200 degrees C and showed enhanced activity in three cycling runs for the degradation of acid red B (ARB) in the presence of H2O2 under UVA irradiation. Subsequently, the catalyst's activity was maintained effectively after 10 successive cycling experiments. Moreover, the catalyst was found to be highly effective for the degradation of nonbiodegradable azodyes ARB, reactive brilliant red X-3B, reactive red K-2G, cationic red X-GRL, and cationic blue X-GRL at neutral pH values. On the basis of characterization by X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infrared spectra, the surface layer of the catalyst was mainly composed of alpha-FeOOH and gamma-Fe2O3, and the core was Fe0 (FeOxH2x-3/ Fe0). Fe,OxH2x3/Fe0 was very easily recovered from the reaction system by magnetic separation. The degradation of azodyes came from the synergistic effect of the catalysis of galvanic cells and the oxidation of heterogeneous photo-Fenton reaction on the basis of all information obtained under different experimental conditions. By the total organic carbon and GC-MS analysis, the degradation process of ARB was shown to proceed with decolorization and naphthalene ring openings into CO2 and small organic acid.     

“谷磨坊”调味牛奶的研制

研制了一种新型营养牛奶——向牛奶中添加各种黑色食品而成的调味牛奶,并对其工艺进行了研究。通过正交实验确定了最佳配方：鲜牛奶80％;白砂糖添加量5％;黑米粉添加量1．2％;黑芝麻粉添加量0．4％;黑豆粉添加量0．8％;稳定剂添加量0.3％。     

Recent developments in Hericium erinaceus polysaccharides: extraction,purification, structural characteristics and biological activities

Abstract

Hericium erinaceus (H. erinaceus), an edible mushroom with medicinal value, has a long history of usage in China and other oriental countries. Polysaccharide is supposed to be one of the major bioactive compounds in H. erinaceus, which possesses immunomodulating, anti-cancer, antioxidant, gastroprotection and intestinal health promotion, neuroprotective, hepatoprotective, antihpyerglycemic and hypolipidemic activities. In this review, the current advancements on extraction, purification, structural characteristics and biological activities of polysaccharide from different sources (fruiting body, mycelium and culture broth) of H. erinaceus were summarized. Among these aspects, summaries of the structural characteristics focused on the purified polysaccharides. Meanwhile, comparisons on the structural characteristics among the purified polysaccharides obtained from above three sources were made. Moreover, their biological activities were introduced on the basis of in vivo and in vitro experiments, and some possible action mechanisms were listed. Furthermore, the structure-activity relationship of the polysaccharide was discussed. New perspectives for the future work of Hericium erinaceus polysaccharide were also proposed.

• HIGHLIGHTS

• Extraction, purification, structural characteristics and biological activities of Hericium erinaceus polysaccharide (HEP) were summarized.

• Structural characteristics of the purified polysaccharides from different sources (fruiting body, mycelium and culture broth) of Hericium erinaceus were summarized and compared.

• Structure-activity relationship of HEP was discussed, and new perspectives for the future work of this polysaccharide were proposed.

     

燃煤锅炉除尘专用滤料的开发

介绍机械制造厂燃煤锅炉的烟尘特点,分析滤料失效的原因,提出一套针对该工况的滤料解决方案。介绍针对复杂工况条件所选用的纤维种类以及复合面层原料成分配比的确定,最终选用针刺工艺加工并对该新产品的基本性能进行了测试分析。     

高强粗旦聚丙烯纺黏针刺非织造土工布的耐久性研究

采用耐酸碱、室外自然老化、抗热氧老化和抗冻融试验,研究高强粗旦聚丙烯纺黏针刺非织造土工布的耐久性,并将其与聚酯纺黏针刺土工布、抗紫外线(UV)高强粗旦聚丙烯纺黏针刺非织造土工布进行对比.结果 表明:同等面密度条件下,高强粗旦聚丙烯纺黏针刺土工布比聚酯纺黏针刺土工布具有更优的耐酸碱性能、抗冻融性能及抗热氧老化性能,但耐光...     

高低Mi值聚丙烯共混纺丝

本文采用高低Ｍｉ值聚丙烯共混纺丝。生产结果表明，可以降低低Ｍｉ值聚丙烯纺丝温度，改善其可纺性及纤维性能。     

多菌联合发酵白酒丢糟生产蛋白质饲料的工艺优化

通过L9(34)正交试验研究了白地霉、黑曲霉和绿色木霉联合发酵白酒丢糟生产蛋白质饲料的发酵条件,结果表明,最佳发酵条件为:接种12％混合菌液,添加3％硫酸铵,30℃条件下发酵7d,发酵后的白酒丢糟蛋白质含量达28.88％,比发酵前白酒丢糟高14.1％.     

超声波辅助提取油茶籽油工艺条件研究

以油茶籽为原料,筛选出正己烷为提取油茶籽油的适宜溶剂,并确定了最佳提取方法。考察料液比、提取温度和提取时间等因素对油茶籽油得率的影响,在单因素试验的基础上,通过正交试验确定了提取油茶籽油的较佳工艺条件,并对该工艺条件下提取的油茶籽油进行了理化检测。结果表明:在试验范围内,各因素对油茶籽油得率的影响依次为提取温度>料液比>提取时间。以正己烷为溶剂提取油茶籽油的较佳工艺参数:料液比为1:12、超声波提取温度60℃、提取时间30 min。在该工艺条件下得率达40.89%,所得油茶籽油的各项理化指标均达到了国家标准要求。     

豆类食品中4种大豆异黄酮的含量分析

检测并评估市场上主要豆类食品中大豆异黄酮的含量,进一步补充和完善大豆异黄酮含量数据库.选购日常豆类食品11类,共计51个样品,对样品进行真空干燥、正己烷脱脂、80％甲醇提取处理后,采用高效液相色谱法对其中的4种大豆异黄酮、染料木素、染料木苷、大豆苷元、大豆苷进行检测和分析.结果显示:豆干类为所选样品中大豆异黄酮含量最多的食品,平均含量＞600μg/g,嫩豆腐、油豆腐、黄豆芽、绿豆芽、豆浆粉和腐乳类样品中大豆异黄酮含量范围100～600μg/g,豆浆类＜100 μg/mL,豆奶粉类＜100 μg/g,酱油和绿豆糕类样品中异黄酮含量低于检出限;腐乳类样品中苷元比例较高,说明该类食品中雌激素样活性成分比例较高.推断豆干、腐乳类食品的长期过度摄入,可能会引发较为明显的雌激素样生物效应.     

Coolmax(R)袜子的研究与开发

从原料的组合到结构设计对Coolmax(R)袜子进行了详细的分析与论证.舒适性方面,采用了锦纶与氨纶包覆,体现了良好的弹性和回复性;考虑到吸湿、排汗方面,采用了吸湿排汗功能的Coolmax(R)纤维;耐磨性方面考虑采用锦纶.这些不同种纤维的有机组合,体现出的多功能性,是现阶段袜子开发的新思路、新趋势.