Table of Content

30 March 2006, Volume 40 Issue 2 Previous Issue    Next Issue

研究报道

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Chemical Constituents of Essential Oil from Twigs of Keteleeria Calcarea HE Dao-hang;PANG Yi;SONG Shao-yun;LI Guang-hong 2006, 40 (2):  8-10.  Abstract ( 696 )   PDF (830KB) ( 900 )   Save An essential oil in a yied of 0.1% was obtained from fresh twigs of Keteleeria calcarea by steam distillation. Twenty-one constituents were identified by GC-MS analysis for the first time. The identified constituents represent 89.59% of the peak area of the oil. Terpenes are major chemical constituents in the oil. The main compounds were (-)-β-elemene(2.91%), β-caryophyllene(46.21%), humulene(8.59%), caryophyllene oxide(14.53%) and germacrene (4.09%). Related Articles | Metrics

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Chemical Constituents of Essential Oil from Leaves of Three Species of Clausena NA Zhi 2006, 40 (2):  19-22.  Abstract ( 709 )   PDF (1187KB) ( 1031 )   Save Essential oils from the leaves of three species of Clausena plants, namely Clausena dunniana Levl., Clausena lansium (Lour.) Skeels and Clausena lenis Drake were obtained by steam distillation. The chemical constituents of the oils were separated and identified by means of capillary gas chromatography-mass spectrometry. 38, 81 and 28 peaks were separated, respectively, of which 34, 62 and 19 compounds were identified, representing 99.64%, 92.85% and 94.40% of the total oil amount, respectively. The main components of the three essential oils are monoterpenoids, sesquiterpenoids, derivatives of phenol and aliphatics. Related Articles | Metrics

专题讲座

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Brief Introduction to Clean Development Mechanism (CDM)——Brief Theoretics on Methodology of Clean Development Mechanism DAI Wei-di 2006, 40 (2):  50-52.  Abstract ( 361 )   PDF (430KB) ( 595 )   Save In this course, the basic knowledge and development state of the Clean Development Mechanism (CDM) in the world is introduced. According to the situation of our country, it is considered that it is very important and significant to implement CDM in China.This part is a piece of science popularization, and it introduces mainly some basic concepts of CDM: baseline, extra, project boundary and leakage and monitoring methodology, etc. using simple and understandable examples to discuss problems more clearly. Related Articles | Metrics

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Rapid Determination of Iron in Rosin SHI Xiang-li;LI Meng-zhu 2006, 40 (2):  25-26.  Abstract ( 658 )   PDF (397KB) ( 891 )   Save A new method for determination of iron in rosin with KSCN by spectrophotometer is introduced. This method has many merits such as easy pretreatment, rapid and accurate, low cost,etc. in contrast with other test methods. And it would be applied satisfactorily to the daily analysis for rosin manufacturers. Related Articles | Metrics

综述

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The Extraction Methods and the Developing Prospect of Secoiridoid Copmounds in Olea L. Plant WANG Cheng-zhang;GAO Cai-xia;CHEN Wen-ying;JIANG Cheng-ying 2006, 40 (2):  45-49.  Abstract ( 493 )   PDF (659KB) ( 1309 )   Save Secoiridoid compounds are important marked compounds in Olea L., in particular, oleuropein has some pharmacological activities definitely. This paper reviews the plant origin, chemical structure, physico-chemical characteristics,and pharmacological activities for secoiridoid compounds in Olea L.plant. The processing technology of olive leaves extract and analytical approach for oleuropein are proposed, which are foundation and useful for active components such as oleuropein to be processed and applied rapidly in China. Related Articles | Metrics

研究报道

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Refining Technics of Disproportionated Rosin Soap and Its Decoloring Mechanism Analysis ZHU Yue-lin;TANG Li-ni;HU Xue-yin;GUO Hong;JIAO Jian 2006, 40 (2):  15-19.  Abstract ( 525 )   PDF (543KB) ( 1076 )   Save Aimed at the color problem of disproportionated rosin soap in present domestic market, rosin soap decoloration experiments are thoroughly studied in this paper. The decoloration by SQZ-9 is ascertained as a simple, economical, prominent process, which can reduce the color of disproportionated rosin soap from Gardner color number 8 to 3. Based on the results, in Guangxi Wuzhou Rosin Ltd.Co., a pilot experiment was done, during which two problems appeared to be the partially high temperature of soap and descending of the transparency of the decolored disproportionated rosin. As the solution to the problems, the decoloring technics was improved. The decoring mechanism is also supposed in this paper. Related Articles | Metrics

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Study on Microwave-assisted Extraction of Yellow Pigment from Gardenia Jasminoiedes Ellis PENG Mi-jun;GAO Zhong-song;ZHU Jiong-bo;PENG Sheng;LI Shen-zheng 2006, 40 (2):  1-4.  Abstract ( 676 )   PDF (643KB) ( 1073 )   Save The optimum technological parameters of microwave-assisted extraction of gardenia yellow pigment (GYP) were studied. An orthogonal test table L9(34) was used with the factors of ethanol concentration, ratio of solid to liquid, power of microwave radiation and extracting time. The content of GYP was determined by spectrophotometry. The optimum conditions are as follows:60% EtOH as extracting solvent, solid to liguid ratio 1:20,power of microwave 280 W and extracting time 40 s. The extract yield was 17.83% and extraction rate reached 98.20%. Compared with traditional methods such as leaching by water or organic solvents, it was proved that microwave-assisted extraction of GYP is a rapid method with higher yield. Related Articles | Metrics

综述

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A Review of Measures for Tar Elimination in Biomass Gasification Processes SUN Yun-juan;JIANG Jian-chun 2006, 40 (2):  31-35.  Abstract ( 973 )   PDF (502KB) ( 3349 )   Save One of the main technical barriers in biomass gasification development is the formation of tar. After condensation,the tar will not only erode reactors, but affect the following production. So the tar must be eliminated. Tar removal technologies can be divided into two approaches: physical methods and chemical methods. Although the physical methods can eliminate tar very effectively, but during the process they also produce lots of wastewater which pollute the environment. Chemical methods not only can eliminate tar radically,but also increase the conversion rate of the raw material. This paper emphasizes to introduce the chemical methods. Related Articles | Metrics

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Research Progress of Rosemary in Europe Rosemary Cole;BI Liang-wu;ZHAO Zhen-dong 2006, 40 (2):  41-44.  Abstract ( 948 )   PDF (598KB) ( 2449 )   Save Progress situation of rosemary (Rosmarinus officinalis L.) in Europe, especially in UK, France, Germany, Spain, Italy, and Switzerland was reviewed. Scientific research, standard, plantation, processing, utilization, and trade of rosemary were introduced. Related Articles | Metrics

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An Improved Method for the Synthesis of 6-Nitrocoumarin QI Gang;TU Shu-zi 2006, 40 (2):  23-24.  Abstract ( 851 )   PDF (602KB) ( 1178 )   Save 6-Nitrocoumarin was synthesized from coumarin through a treatment with NaNO3 and H2SO4. This method is benefit to control the quantity of nitrating agent and reduce the quantity of water. The reaction occurred under low temperature for the quantity of water was reduced, so the double bond is not oxidized. This method is convenient and effective. Related Articles | Metrics

综述

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Study on New Preparation Technology of Biodiesel from Natural Oils——The Research Development of Application of Conjugated Acids and Their Derivatives from Natural Oils NIE Xiao-an;JIANG Jian-chun;YANG Kai-hua;DAI Wei-di 2006, 40 (2):  27-30.  Abstract ( 418 )   PDF (447KB) ( 1153 )   Save The preparation technology of biodiesel and chemical products from natural oils was summarized, the synthesis method and application areas of three kinds of chemical products of C21 dibasic acid,C22 tribasic acid and C36 dimer from natural oils were introduced,too.It was found that the shortage of biodiesel's low cost could be overcome by applying partial double bonds of oils to synthesize some profitable chemical products. The economical benefit of total product line could be increased by the chemical products. The preparation technology of biodiesel and chemical products has profoundly practical value. Related Articles | Metrics

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The Technical Design and Real Example Analysis of the Disposal of the Printing and Dyeing Wastewater JI Xun;TAN Jun-li 2006, 40 (2):  11-14.  Abstract ( 731 )   PDF (568KB) ( 613 )   Save The wastewater release of the national printing and dyeing industry was en studied,then a suitable disposal technics was brought forward. Through the coagulation and deposition,acidification and hydrolysis,aerobic biochemical treatment, the released water steadily meets the first grade of the waste release standard(GB 4287-1992) of national fabric dyeing industry. Based on the example,the possibility and application magnification of disposal was analyzed,and the perfect prospect of the technics was forecasted. Related Articles | Metrics

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The Utilization of Biomass Resources in Desert Area WANG Dan;SONG Zhan-qian;SHANG Shi-bin 2006, 40 (2):  36-40.  Abstract ( 670 )   PDF (460KB) ( 1357 )   Save The desert area occupied one third of Chinese land. On the one hand, there is atrocious environment and poor economy in the desert area; on the other hand, there are abundance utilizable biomass resources because of the rigor natural selection. Therefore, utilization of the renewable resources of desert area with modern technology plays an important role in the exploitation and continuable development of the west China. The utilization of herbage, shrub and alga growing upon desert area was summarized. Related Articles | Metrics

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Study on the Esterification of Rosin under Microwave Radiation HU Zhi-jie;CAI Zhi-hui 2006, 40 (2):  5-7.  Abstract ( 643 )   PDF (449KB) ( 885 )   Save The effects of alcohol dosage, microwave power and reaction time on the esterification of rosin under microwave radiation using zinc oxide as a catalyst were studied.Dodecanol rosinate with acid value 8.1 mg/g,softening point 98.3℃ and ethylene glycol rosinate with acid value 11.2 mg/g,softening point 83.2℃ were prepared under 800 W microwave radiation for 80 min with the molar ratio of rosin to dodecanol 1:1.5 and the molar ratio of rosin to glycol 1:0.65. Related Articles | Metrics