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Search Results: 1 - 10 of 6608 matches for " HOU Lisong "
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FLUORESCENT PROPERTIES OF RHODAMINE 6G DOPED IN SILICA GELS AND COATINGS VIA THE SOL-GEL PROCESS
凝胶中罗丹明6G的荧光性质

HOU Lisong LIU Chung CHEN Shuchung,
候立松
,刘纯,陈述春

材料研究学报 , 1991,
Abstract: 用溶胶—凝胶法将不同浓度的罗丹明6G(Rhodamine 6G,R6G)染料掺入硅凝胶块和涂层薄膜中,用倍频 YAG 激光(0.53μm)做激发光源研究其荧光性质。对凝胶块、凝胶薄膜和乙醇溶液中 R6G 的荧光光谱进行了比较,研究了温度和 R6G 浓度对荧光性质的影响。实验结果表明,当R6G/SiO_2摩尔比高达 10~(-4)时,凝胶薄膜中的 R6G 分子仍不发生聚集现象;在475K 以下,积分荧光强度随温度的变化表现出很好的重现性;当温度高于600K 时,荧光消失,表明染料 R6G 已完全分解。
PHASE TRANSITION OF VO_2 THIN FILMS PREPARED BY DIP-COATING TECHNIQUE
浸渍法VO_2薄膜的相变

LU Songwei,HOU Lisong,GAN Fuxi,
陆松伟
,侯立松,干福熹

材料研究学报 , 1990,
Abstract: 本文以VO(i-OC_2H_5)_3为原料采用溶胶-凝胶浸渍法在三种不同基片上制备了凝胶薄膜,通过真空热处理得到了 VO_2薄膜。由于 VO_2在67℃左右产生热诱导半导体-金属可逆相变,红外区域透过率在加热前后可变化45%,采用红外光谱及 X 射线衍射法分析了 VO_2薄膜的结构。
Crystallization properties of Sn--doped Ge--Sb--Te phase--change films
Sn掺杂Ge-Sb-Te相变薄膜的晶化特性

GU Sipeng,HOU Lisong,ZHAO Qitao,
顾四朋
,侯立松,赵启涛

材料研究学报 , 2004,
Abstract: Sn-doped Ge_2Sb_2Te_5 thin films were prepared by RF-sputtering.The effect of Sn- content on their crystallization properties was studied by XRD and DSC.The XRD spectra of the films in the as-deposited and heat-treated states showed that the films changed from amorphous to crystalline states due to heat-treatment and Sn-Te phase appeared.Using DSC data of the amorphous film materials,the activation energies were calculated by measuring the peak crystallization temperatures at different heating rates.It was found that the Ge-Sb-Te-Sn samples have higher activation energy of crystallization than that of the Ge_2Sb_2Te_5 sample.It is concluded from these results that Sn-doping can increase the crystallization rate of the Ge_2Sb_2Te_5 phase-change material,and thereby increase the erasing speed of the material for rewritable optical storage.
Coating of Mineral Acids with Niobic Solid Acid for Preparing Furfural from Nut Shell of Camellia oleifera Abel  [PDF]
Lisong Hu, Menghao Du, Jingping Zhang
Open Journal of Forestry (OJF) , 2016, DOI: 10.4236/ojf.2016.65037
Abstract: Nut shell of Camellia oleifera Abel which has large scale of plantation in mountainous region of southern China is abundant renewable resource. The nut shell is suitable for preparation of furfural, as the content of which is as much as 16% (based the dried nut shell). In early time, mineral acids were employed as typically catalyst for preparing of furfural from the nut shells. These mineral acids could pollute water and corrode equipment. In this paper we used various mineral acids coating with niobic acid as catalysts to investigate reactions for preparation of furfural. Among these catalysts, the catalyst of sulfuric acid coating with niobic acid was found to be very effective, which had higher hammett acidity and better effect of hydrolysis of the nut shells; The catalysts of sulfuric acid coating with niobic acid was characterized, and the conditions of preparation of the catalyst were investigated. The optimum conditions were: sulfuric acid as coating acid, the concentration of sulfuric 1.1 mol/L, impregnation time 8 h, calcination time 8 h and calcination temperature 450°C. Then hydrolysis of the nut shells was explored, the optimum conditions were as follows: dose of catalyst 20%, ratio of solid to liquid 1:15, reaction temperature 100°C, reaction time 4 h; Under this condition, the yield of furfural was 8.7%.
Hemicellulose-Based Hydrogels Present Status and Application Prospects: A Brief Review  [PDF]
Lisong Hu, Menghao Du, Jinping Zhang
Open Journal of Forestry (OJF) , 2018, DOI: 10.4236/ojf.2018.81002
Abstract: Hemicellulose is one of the most abundant natural resources, which extensively exist in the pant tissues as the compositions of the cell wall filling between lignin and cellulose. In this review, the hemicellulose based hydrogels was illustrated in details including the hemicellulose derivatives (such as precursor of hemicellulose based hydrogel), hydrogels fabrication methods, origin of hemicellulose, composite hydrogels, and so on. In addition, the authors as well overviewed the new methods for fabrication of hemicellulose based hydrogels and special functional hemicellulose based hydrogels.
Physicochemical Properties and Nutritional Ingredients of Kernel Oil of Carya cathayensis Sarg  [PDF]
Lisong Hu, Menghao Du, Jingping Zhang
American Journal of Plant Sciences (AJPS) , 2018, DOI: 10.4236/ajps.2018.912180
Abstract: Carya cathayensis Sarg is distributed near Tianmu mountain areas in Zhejiang Province and Anhui Province, China. Kernel of Carya cathayensis Sarg, which is well-known for the daintiness and nutritional content, is popular and very delicious food in eastern China. In this paper, we investigated the physiochemical properties and nutrient gradients of the kernel oil of Carya cathayensis Sarg. The results showed that the kernel oil of Carya cathayensis Sarg contained 63% of fat, 9.1% of proteins, 3.6% of starch and 4.6% of soluble proteins (based ration of weight). The compositions of the fatty acids were very similar to olive oil, and the total unsaturated fatty acids were 94%. Meanwhile, the kernel oil of Carya cathayensis Sarg also contained some polyphenols such as vanillic acid, ferulic acid, 3-methoxybenzoic acid and quercetin. The content of total polyphenols was 9.7 μg/g. Furthermore, the kernel oil of Carya cathayensis Sarg also contained some trace amount of squalene, β-Sitosterol, Vitamin E.
Chemistry of the Main Component of Essential Oil of Litsea cubeba and Its Derivatives  [PDF]
Lisong Hu, Menghao Du, Jingping Zhang, Yangdong Wang
Open Journal of Forestry (OJF) , 2014, DOI: 10.4236/ojf.2014.45050
Abstract: The tree of Litsea cubeba is widely spread in China, Indonesia and other part of Southeast Asia. The essential oil of Litsea cubeba (EOLC) is obtained by steam distillation from the pepper-like fruits tree Litsea cubeba. The EOLC consists of about 29 active compounds. Among them, citral is the main component; the content of citral is nearly 80% of the EOLC. Due to the special function group, citral is easy to react with many chemicals. Thus, EOLC is usually applied as starting material to carry out aldol condensation, reduction, and six-member ring forming reaction. The EOLC is extensively employed to synthesis of geranal nitriles, pseudonoe, ionone, methyl ionone, Vitamin E and Vitamin A. These products are broadly applied in the fields of fragrance, perfume, medicine and so on. This paper presents comprehensive utilization of EOLC as raw materials to synthesize many active chemicals.
Present Situation and Prospective of Camellia Nut Shells Utilization  [PDF]
Jinping Zhang, Lisong Hu, Zhoulian Wang, Menghao Du, Xiaohua Yao
Open Journal of Forestry (OJF) , 2015, DOI: 10.4236/ojf.2015.57066
Abstract: With the rapid development of Camellia oleifera industry, more and more Camellia nut shells have been produced, leading to serious environmental pollution problem. This paper reviews the works on the characterization of the physical and chemical properties of Camellia nut shells, active ingredient extraction, its application in chemical production, growing media and animal feed and its properties as a biomass. Based on the review, we proposed a novel all-component high value application strategy to covert camellia nut shells into high value biomasses, which could realize waste recycling and environmental protection.
Anti-Fatigue Effect of Blended Camellia oleifera Abel Tea Oil and Ge-132 in Mice  [PDF]
Lisong Hu, Xuezhi Fang, Menghao Du, Jingping Zhang
Food and Nutrition Sciences (FNS) , 2015, DOI: 10.4236/fns.2015.615152
Abstract: Nowadays, people are busier and busier for working and living, and suffer a lot of pressure on their body or mind. Therefore, people are prone to have fatigue activity and decrease their working efficiency and happiness. It was reported that fatigue is a common symptom in the community, with up to half of the general population complaining of fatigue. More and more researchers devoted themselves to studying natural active ingredients in organism as the anti-fatigue drugs to release fatigue symptom. However, these natural ingredients were difficult to obtain from plants, animals and microorganisms by separating and purifying. In addition, some active substances have many side effects. In our study, we employed tea seed oil as main ingredients blended with bis-(carboxyethylgermanium) sesquioxide (Ge-132) to investigate the effects of anti-fatigue on mice by administrating mice with low dose, intermediate dose and high dose of tea seed oil complex for 0, 2 or 4 weeks. The specific tests of studying effects of anti-fatigue were body weight, weight-loaded force swimming, blood urea nitrogen, blood lactic acid and hepaticglycogen. And the results showed that appropriate level of tea seed oil complex could decrease the body weight and prolong the weight-loaded swimming time, and had an active effect on the bloodurea nitrogen, hepatic glycogen and blood lactic acid level mice, which significantly embodied the anti-fatigue activity of tea seed oil complex.
Quantitative Analysis Method of the Tea Saponin  [PDF]
Menghao Du, Shaohai Guo, Jinping Zhang, Lisong Hu, Mingze Li
Open Journal of Forestry (OJF) , 2018, DOI: 10.4236/ojf.2018.81005
Abstract: In this study, the detection method of tea saponin has been studied firstly. Determining the maximum absorption wavelength is 540 nm. Standard curve equation is y = 0.0015x - 0.0885. The correlation coefficient r = 0.9983 (p < 0.01). The relative standard deviation is 1.13%. Reclaimable rate of adding standard sample is 89.5% - 97.7%. Comparing vanille-sulfuric acid of gravimetric determination, the maximum deviation is 3.27%, indicating that vanille-sulfuric acid method is worth of quantitative analysis of tea saponin.
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