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| 1 | Patterns of synonymous codon usage bias in chloroplast genomes of seed plants显示文摘Codon usage in chloroplast genome of six seed plants (Arabidopsis thaliana, Populus alba, Zea mays, Triticum aestivum, Pinus koraiensis and Cycas taitungensis) was analyzed to find general patterns of codon usage in chloroplast genomes of seed plants. The results show that chloroplast genomes of the six seed plants had similar codon usage patterns, with a strong bias towards a high representation of NNA and NNT codons. In chloroplast genomes of the six seed plants, the effective number of codons (ENC) for most genes was similar to that of the expected ENC based on the GC content at the third codon position, but several genes with low ENC values were laying below the expected curve. All of these data indicate that codon usage was dominated by a mutational bias in chloroplast genomes of seed plants and that selection appeared to be limited to a subset of genes and to only subtly affect codon us-age. Meantime, four, six, eight, nine, ten and 12 codons were defined as the optimal codons in chloroplast genomes of the six seed plants. | ZHOU Meng LONG Wei LI Xia | 2008 | Forestry Studies in China2008，10，4： | 30 |
| 2 | Forest vegetation of Xishuangbanna,south China显示文摘Xishuangbanna of southern Yunnan is biogeographically located at a transitional zone from tropical southeast (SE) Asia to subtropical east Asia and is at the junction of the Indian and Burmese plates of Gondwana and the Eurasian plate of Laurasia. The region, though surprisingly far from the equator and at a relatively high altitude, has a rich tropical flora and a typical tropical rain forest in the lowland areas. Based on physiognomic and ecological characteristics, floristic composition and habitats combined, the primary vegetation in Xishuangbanna can be organized into four main vegetation types: tropical rain forest, tropical seasonal moist forest, tropical montane evergreen broad-leaved forest and tropical monsoon forest. The tropical rain forest can be classified into two subtypes, i.e. a tropical seasonal rain forest in the lowlands and a tropical montane rain forest at higher elevations. The tropical sea-sonal rain forest has almost the same forest profile and physiognomic characteristics as equatorial lowland rain forests and is a type of truly tropical rain forest. Because of conspicuous similarity on ecological and floristic characteristics, the tropical rain forest in Xishuangbanna is a type of tropical Asian rain forest. However, since the tropical rain forest of Xishuangbanna occurs at the northern edge of tropical SE Asia, it differs from typical lowland rain forests in equatorial areas in having some deciduous trees in the canopy layer, fewer megaphanerophytes and epiphytes but more abundant lianas and more plants with microphyll. It is a type of semi-evergreen rain forest at the northern edge of the tropical zone. The tropical montane rain forest occurs at wet montane habitats and is similar to the lower montane rain forest in equatorial Asia in floristic composition and physiognomy. It is a type of lower montane rain forests within the broader category of tropical rain forests. The tropical seasonal moist forest occurs on middle and upper limestone slopes. It is similar to the tropical montane evergreen broad-leaved forest in the region in physiognomy, but differs from the latter in floristic composition. It is a vegetation type on limestone at high elevations. The monsoon forest in Xishuangbanna is a tropical deciduous forest under the influence of a strong monsoon climate and is considered to be a transitional vegetation type between a tropical rain forest and savanna in physiognomy and distribution. The tropical montane evergreen broad-leaved forest is the main montane vegetation type in the region. It is dominated largely by the families Fagaceae, Euphorbiaceae, Theaceae and Lau-raceae. It differs from tropical lower montane rain forests in its lack of epiphytes and in having more abundant lianas and plants with compound leaves. It is considered to be a distinct vegetation type from the northern margin of mainland southeastern Asia, controlled by a strong seasonal climate, based on its floristic and physiognomic characteristics. | Zhu Hua | 2006 | Forestry Studies in China2006，8，2： | 22 |
| 3 | Structural Characteristics and Eco-adaptability of Heteromorphic Leaves of Populus euphratica显示文摘The microstructural and ultrastructural traits of three kinds of typical leaves of Populus euphratica Olive, including lanceolate, broad-ovate and dentate broad-ovate leaves, were studied by using electron microscope and optical microscope. The re- sults showed that with the leaves changing from lanceolate shape to dentate broad-ovate shape, their structure obviously tended to be xeromorph: developed palisade tissue, undeveloped spongy tissue, thick cutin layer and sunken stomas. The amount of mitochondria tended to be increased, and the shape of chloroplasts varied from regular spindle to irregular rotundity or oval. The leaves were cov- ered with wax without cilium, and the stomas on the upper and lower epidermis of the leaves opened unevenly. The stomas on the lower epidermis were deeper than those on the upper epidermis under the scanning electron microscope. The results implied that the structural characteristics of the diversiform-leaves of P. euphratica are related to its eco-adaptability. | LiZhao-xia ZhengCai-xia | 2005 | Forestry Studies in China2005，7，1： | 18 |
| 4 | Effects of Phosphoric Acid on Liquefaction of Wood in Phenol and Optimum Liquefaction Processing Parameters显示文摘To clarify the influencing factors of liquefaction of wood in phenol using phosphoric acid as a catalyst and get its liquefaction technology, a study on the liquefaction technology of Chinese fir (Cunninghamia lanceolata) and poplar (triploid Populus tomentosa Carr) under different conditions was conducted. The results indicate that the residue rate decreases with the increase of liquefaction temperature, liquefaction time, catalyst content or liquid ratio. It is also found that the optimum condition of liquefaction for poplar is estimated as: the reaction temperature of 180 C, the reaction time of 2.5 h, liquid ratio (phenol/wood ratio) of 4.5 and catalyst content of 8%, and 4.2% residue rate could be obtained. Under the processing parameters of temperature 180 C, the reaction time of 2.5 h, liquid ratio (phenol/wood ratio) of 4 and catalyst content of 10%, the residue rate of Chinese fir can reach 5.6%. | ZhangQiuhui ZhaoGuangjie JieShujun | 2004 | Forestry Studies in China2004，6，3： | 17 |
| 5 | Liquefaction and Product Identification of Main Chemical Compositions of Wood in Phenol显示文摘To clarify liquefaction ratios and their construction variations of the main chemical compositions of wood in phenol using phosphoric acid as a catalyst, the chemical ingredients of wood such as holocellulose, cellulose and lignin, were measured and extracted according to GB methods. With Fourier transform infrared (FTIR), the product identification of reactant before and after liquefaction in phenol was investigated. The molecular weights and their distributions of the liquefaction results (acetone soluble parts) were studied by gel permeation chromatography (GPC). Results show that the molecular weights and their distributions of poplar and Chinese fir are almost the same. In poplar, the distribution of cellulose is the largest, and that of holocellulose the smallest after liquefaction. For Chinese fir, the distribution of holocellulose is the largest, and that of cellulose the smallest. After liquefaction of poplar cellulose, the change bands of FTIR spectrum observed below 1 600 cm-1, can be attributed to new substitute groups. The same is true for poplar lignin. For Chinese fir, the spectra of liquefaction results of all chemical compositions differ from that of wood meal. This reveals the more activity groups were produced because of the reactions between Chinese fir and phenol. The research shows that the liquefaction ratios of poplar decrease in the following order: holocellulose > lignin > cellulose, and those of Chinese fir in the order: lignin > cellulose > holocellulose. | Zhang Qiu-hui Zhao Guang-jie Jie Shu-jun | 2005 | Forestry Studies in China2005，7，2： | 14 |
| 6 | Pine wilt disease: a short review of worldwide research显示文摘This article summarizes the results of the research papers presented at the International Symposium on pine wilt disease (IUFRO Working Party Meeting 4.04.03) held in July 2009, at Nanjing, China. The general topics covered were on pine wilt disease (PWD), its causal organism, the pinewood nematode (PWN) Bursaphelenchus xylophilus, plus other PWN-associated microorganisms that play a significant role in PWD such as bacteria (e.g. Pseudomonas fluorescens). Most of the papers that are reviewed are based on work on PWD-PWN in East Asia and Russia. Specific topics covered include: 1) the fundamental conceptions of PWD development, 2) pathogenicity, 3) host-parasite relationships including the histopathology of diseased conifers and the role of toxins from bacteria-nematode ecto-symbionts, 4) PWN life cycle and transmission, 5) B. xylophilus dissemination models, 6) associations (with other nematodes), 7) diagnostics, 8) quarantine and control of the PWN and 9) biocontrol of the PWN. | Alexander Yu. RYSS Oleg A. KULINICH Jack R. SUTHERLAND | 2011 | Forestry Studies in China2011，13，2： | 14 |
| 7 | Research advances in the study of Pistacia chinensis Bunge, a superior tree species for biomass energy显示文摘As a renewable energy, biomass energy has aroused wide attention and studies of this issue have become a hot topic throughout the world. Pistacia chinensis Bunge (Anacardiaceae) is a superior species for biomass energy with high oil content in seeds and wide geographic distribution. It is a dioeciously, deciduous arbor, flowering from March to April and bearing fruits from September to November. The classification, regional distribution and biological characteristics of P. chinensis are stated in this paper, then, research advances in the growth, breeding and physiology of this species are summarized. The problems in present studies are broached. Finally, a future direction for research is proposed. | Li Hong-lin Zhang Zhi-xiang Lin Shan-zhi Li Xiao-xu | 2007 | Forestry Studies in China2007，9，2： | 14 |
| 8 | Agroforestry and its Application in Amelioration of Saline Soils in Eastern China Coastal Region 显示文摘Some environmental problems, especially soil salinity hinder the regional sustainable development of eastern China coastal region. Salinity mainly comes from tide weave, seawater flooding and seawater intrusion. Over exploitation of groundwater, which is the result of unfitful land use systems, leads to seawater intrusion and salt concentration increase. Agroforestry systems can enrich soil fertility and prevent soil salinization, furthermore help maintain biodiversity and enhance productivity. For the intergrated multiple ecosystems the most critical issue is to select optimum tree species and rationally arrange these plants. The basics of this multiple ecosystem is that different plants will occupy variable ecological niches within an area, both in space and in soil depth. Shelterbelts and trees intercropping with agricultural crops are major types of the multiple ecosystem. Shelterbelts can reduce wind speed and consequently lessen evaporation and erosion of the soil, increase pasture growth by up to 60% on exposed sites, increase crop yields by up to 25%. Besides intercropping with jujube, other agroforestry multiple ecosystem such as forestry plus agriculture, forestry plus agriculture plus fishery, and forestry plus animal husbandry are the most appropriate ways to utilise land resource in this region. | ZhangJianfeng XingShangjun LiJiyue F.Makeschin SongYumin | 2004 | Forestry Studies in China2004，6，2： | 13 |
| 9 | Responses of germination and radicle growth of two Populus species to water potential and salinity显示文摘萌芽和二河边的树种的胚根生长上的水潜力, NaCl 和 Na2SO4 的效果, Populus euphratica Oliv。并且 P。pruinosa Schrenk (Salicaceae ) ,被测试。生长房间研究为在 15 鈥 ? 之间的种类的种子萌芽揭示了一个最佳温度范围 5 掳 C。有在答案的所有类型的减少的水潜力的两种类减少的最后的萌芽百分比在实验适用。P。pruinosa 比 P 对低蠄 W 应力不太容忍。euphratica,特别在盐答案。萌芽百分比低于 20% 相信了 P。pruinosa 在 ? 0.6 MPa (NaCl ) 或 ? 0.4 MPa (Na2SO4 ) 并且为 P。euphratica 在 ? 1.2 MPa (NaCl ) 或 ? 0.6 MPa (Na2SO4 ) 。胚根生长两个都,种被木钉, NaCl 和 Na2SO4 的高集中禁止。然而,生长被提高在 ? 0.13 并且 ? 在木钉或在的 0.29 MPa ? 在与提取的水相比的 NaCl 答案的 0.13 MPa。P 的胚根生长。euphratica 比 P 的高。pruinosa。萌芽和胚根生长两个都,种类展出了离子毒性。Na2SO4 是比 NaCl 的 iso 渗透的答案有毒的更多。胚根生长证明了比种子萌芽更敏感。因此,泛滥通过从土壤表面盐沥滤为萌芽而且种类的帮助幼苗建立做产量必要土壤潮湿不仅。种的不同敏感在他们的早生长期间上演力量,而且,在 Talim 盆(西北中国) 在他们的分发贡献观察差别。关键词 Populus euphratica - P。pruinosa - 萌芽 - 咸度 - 胚根生长 - Talim | Li Li Zhang Xi-ming Michael Runge Li Xiao-ming He Xing-yuan | 2006 | Forestry Studies in China2006，8，1： | 13 |
| 10 | Environmental Correlates of Distribution of the 25 Broad-leaved Tree Species Indigenous to Guangdong Province,China显示文摘Twenty-five tree species indigenous to Guangdong Province were chosen in this study to portray their distribution patterns in relation to environmental factors. Both data of species distribution and environmental factors were tabulated based on a digitized map of Guangdong Province gridded at 0.5° latitude × 0.5° longitude. Grid-based diversity was mapped using DMAP, a distribution mapping program, and horizontal patterns were assessed using Kruskal-Wallis tests. The diversity center of the indige- nous tree species under study is located north of 23° N. These tree species exhibit significant latitudinal variation (P = 0.007 4), but no significant longitudinal difference (P = 0.052 2). Non-metric Multidimensional Scaling (NMS) identified five different ecological species groups, while Canonical Correspondence Analysis (CCA) showed the distribution of tree species along each of the five envi- ronmental gradients. An understanding of the environmental correlates of distribution patterns has great implication for the introduc- tion of the indigenous tree species for afforestation. | SuZhiyao ChenBeiguang ChangYong YangJiazhi | 2004 | Forestry Studies in China2004，6，4： | 13 |
| 11 | Electrophysiological and Behavioral Responses of Adult Anoplophom glabripennis (Motschulsky) to Volatile Components of Host-Plant显示文摘Electrophysiological and behavioral responses of adult A.glabripennis(Motsch.)to volatiles from ashleaf maple (Acer negundo L.) were investigated to identify semiochemicals involved in host location.Measurable electroantennogram(EAG) responses were elicited to all compounds tested,the most effective antennal stimulants were trans-2-hexen-l-al,decyl aldehyde and trans-2-hexen-1-ol.These profiles were similar between males and females.In Y-tube olfactometer bioassays,above three compounds with certain concentration,trans-2-hexen-1-al(1%),trans-2-hexen-1-ol(1%) and decyl aldehyde(10%),were significantly attractive to the adults in laboratory.The results show that either EAG or olfactory responding to a particular volatile compound are markedly influenced by the concentration. | Fan Hui Li Jiquan Jin YoujuCollege of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, P. R. China | 2003 | Forestry Studies in China2003，5，1： | 13 |
| 12 | Changes in the biochemical composition and enzyme activity during dormancy release of Cyclocarya paliurus seeds显示文摘Cyclocarya paliurus is only propagated from seeds which have pronounced dormancy. Overcoming seed dormancy is an important component of efficient and cost-effective seedling production of Cyclocarya paliurus. Changes in biochemical composi-tion and enzyme activity were investigated during dormancy release. The activities of all the studied enzymes in the stratified seeds increased significantly, compared to those in the control samples. Of the enzymes examined, the activities of protease increased the most (413.8%), followed by peroxidase (278.7%), lipase (161.0%), glucose-6-phosphate dehydrognase (149.1%) and amylase (60.6%) after 8 months of stratification. Crude fat and protein constituted the bulk of the storage reserves in mature seeds of C. pali-urus. Compared with the seeds before stratification, about 45% of the starch, 46% of the protein and 11% of the crude fat were de-pleted during dormancy release of C. paliurus seeds, while the soluble sugar content was enhanced by 101.5% in the germinating seeds. Correlation analysis showed, during dormancy release of C. paliurus seeds, a close positive relationship between POD and G6PDH activity as well as soluble sugar content and amylase activity, while there was a significant negative relationship between storage substances and their related enzyme activities. | Fang Sheng-zuo Wang Jia-yuan | 2007 | Forestry Studies in China2007，9，1： | 12 |
| 13 | Preparation of liquefied wood-based resins and their application in molding material显示文摘To investigate value in use of liquefied wood-based resin applications in molding material, Chinese fir (Cunninghamia lanceolata) and poplar (Populus tomentosa) wood meal were liquefied in phenol. The reactant was co-condensed with formaldehyde to obtain liquefied wood-based resin. For this paper, we investigated the characterization of the resin and its application in molding material. The result shows that the basic properties of liquefied wood-based resin were satisfactory; the bonding strength of plywood prepared with liquefied Chinese fir and liquefied poplar resin can reach 1.54 and 1.00 MPa, respectively. The compression strengths of the molding material prepared with two kinds of liquefied wood resin were 73.01 and 73.58 MPa, almost the same as that of PF resin molding material. The limiting volume swelling of molding material made with liquefied Chinese resin and liquefied poplar resin were 8.5% and 8.3%, thickness swelling rates of water absorption were 3.3% and 4.2%, and the maximum weight ratios of water absorption were 25.9% and 26.2%, respectively. The soil burial test result shows that the weight loss rate of the molding mate-rials made with liquefied Chinese resin and liquefied poplar resin were 8.3% and 9.1% and that of the PF resin molding material was 7.9%. After the soil internment test, the reduction ratio of compression strength of the two kinds of molding material achieved 16.9% and 17.7%, while that of the PF resin molding material was 15.4%. The test results of wood fungi inoculation on the three surfaces of the molding material indicate the breeding rate of molding material prepared with liquefied Chinese resin and liquefied poplar resin were at level 4 and that of PF resin molding material was at level 1 of the ISO standard. | Zhang Qiu-hui Zhao Guang-jie Yu Li-li Jie Shu-jun | 2007 | Forestry Studies in China2007，9，1： | 12 |
| 14 | An overview of the “Three-North” Shelterbelt project in China显示文摘The 'Three-North' Shelterbelt is the largest and most distinctive artificial ecological engineering project in China.It has been conducted since November 25,1978 in the 'Three-North' (i.e.,Northeast China,North China and Northwest China) regions.In this study,the background and the essential benefits of the 'Three-North' Shelterbelt project are summarized.The basic status and future development of the 'Three-North' Shelterbelt project are also studied.As well,we tried to discuss the problems existing in the current shelterbelt system and the strategies to conduct this ecological project rationally. | LI Miao-miao LIU An-tian ZOU Chun-jing XU Wen-duo Hideyuki SHIMIZU WANG Kai-yun | 2012 | Forestry Studies in China2012，14，1： | 12 |
| 15 | Isolation and analysis of a TIR-specific promoter from poplar显示文摘A 5′ flanking region of the well-conserved Toll/interleukin-1 receptor domain (TIR)-encoding sequence was isolated from the genomic DNA of Melampsora magnusiana Wagner resistant clones of hybrid triploid poplars [(Populus tomentosa × P. bolleana) × P. tomentosa]. Sequencing results and alignment analysis show that the obtained TIR-specific promoter (named as PtTIRp01) was 1,732 bp in length; moreover 3′ region of the PtTIRp01 contains a 398 bp complete TIR-encoding sequence, which significantly cor- responds to the 5′ composition of TIR-NBS type gene PtDRG02, indicating that the obtained TIR-specific promoter region consists of 747 bp long 5′ region of TIR-NBS type gene PtDRG02 and its upstream region of promoter (985 bp). It was found that the 5′ region of TIR-NBS type gene PtDRG02 was characterized in the downstream region of the transcriptional start, named as 5′-untranslated region (5′ UTR), consisting of one 93 bp 5′-untranslation exon, one 213 bp intron and one 441 bp TIR-encoding open reading frame (ORF). In addition, several putative cis-acting motifs were present in the obtained TIR-specific promoter of PtDRG02, including one TATA box, one GC-rich, one AT-rich, one P-box, one 3-AF1 binding site, two CAAT boxes, two GT-1 motifs, three typical W-boxes, four I-boxes, and one multi-cis-acting fragment (MCF). The latter contains five types of regulatory elements (E4, G-box, ABRE motif, box1 and HVA1s), most of which were homologous to the cis-acting regulatory elements involved in the activation of defense genes in plants. Thus, it can be suggested that TIR-specific promoter might be a pathogen-inducible promoter and be necessary for the inducible expression of defense-related genes. | Zheng Hui-quan Lin Shan-zhi Zhang Qian Zhang Zhen-zhen Zhang Zhi-yi Lei Yang Hou Lu | 2007 | Forestry Studies in China2007，9，2： | 11 |
| 16 | Soil Enzyme Activities under Agroforestry Systems in Northern Jiangsu Province显示文摘The authors presented the enzyme characteristics of catalase, sucrase, urease and alkaline phosphatase under agroforestry systems in northern Jiangsu Province. The results show that soil enzyme activities reduce gradually from top to bottom layer of the soil profile, and the fluctuations of catalase and urease are smaller than those of sucrase and alkaline phosphatase. Soil enzyme activities differe significantly in different samples, and the order is arranged as poplar-crop intercropping segment (A, D) > paulownia-crop intercropping segment (B, C) > CK. Furthermore, soil enzyme activities increase with intercropping age. On the other hand, in the same plot, there are closer relationships between enzymes in the soil samples. Catalase, alkaline phosphatase and urease are negatively related, while alkaline phosphatase and urease are positively related (except in samples B and C). In addition, the enzyme activities have a close relationship with the fertilizers. Catalase is positively correlated with the soil pH value (r = 0.854, 0.804, 0.078 and 0.082, respectively), and is negatively correlated with total N (r = –0.201, –0.529, –0.221 and –0.821, respectively), total P (r = –0.143, –0.213, –0.362 and –0.751, respectively) and available P (r = –0.339, –0.351, –0.576, and –0.676, respectively). Sucrase, urease and alkaline phosphatase are negatively correlated with the pH value, while positively correlated with the other fertilizers (r 1). The authors suggest that enzyme activity will be a great potential as an indicator of soil quality. | WanFuxu ChenPing | 2004 | Forestry Studies in China2004，6，2： | 11 |
| 17 | Monthly variation in litterfall and the amount of nutrients in an Aleurites montana plantation显示文摘In this study,the dynamics of monthly variation in litterfall and the amount of nutrients,i.e.,organic C,N,P and K,in an Aleurites montana plantation were analyzed,based on a field study and experiments over one year.The results show that the litterfall mass of A.montana collected generally presents an ascending trend with maximum defoliation occurring in the autumn and winter (October-December),accounting for 75.67% of the total amount of annual litterfall.The sequence in the amount of nutrients in A.montana litter was as follows:organic C > N > K > P;their monthly amounts show various dynamic curves.Similar to the dynamics of the mass of monthly litterfall,the monthly returns of C,N,P and K generally show an ascending trend with their peak values all occurring in December.The mass of A.montana litterfall and the dynamics of its monthly nutrient return provide,to a certain degree,a scientific reference for planting and fertilizing A.montana. | LIN Han HONG Tao WU Cheng-zhen CHEN Hui CHEN Can LI Jian LIN Yong-ming FAN Hai-lan | 2012 | Forestry Studies in China2012，14，1： | 10 |
| 18 | Identification and Evaluation of Antioxidant Activities of Bamboo Extracts显示文摘The antioxidant activity of solvent extracts from two main bamboo species, moso bamboo (Phyllostachys pubescens) and madake bamboo (P. bambusoides) in Japan, was first evaluated by scavenging free radical of 1,1-diphenyl-2-picrylhydrazyl (DPPH), the inhibition activity for peroxidation of linoleic acid, and the reduction power. The methanol-extracts of moso bamboo culms and madake bamboo leaves presented stronger antioxidant activity compared with DPPH scavenging activity. Methanol-extract of moso bamboo culms was further fractionated by different solvents and n-butanol soluble fraction exhibited the most significant activity in the DPPH scavenging assay. The fractionation of n-butanol soluble extract was isolated by silica gel column with gradient mixture solvent of chloroform and methanol. The isolated fractions were directed by the antioxidant activity measured by scavenging the stable DPPH free radical. It was observed that most of the eluted fractions showed the antioxidative activity. Fractions acquired from elution with the mixture solvent of chloroform and methanol (10:1–5:1) showed stronger antioxidant activity than the other fractions. | MuJun UeharaTohru LiJianzhang FurunoTakeshi | 2004 | Forestry Studies in China2004，6，2： | 9 |
| 19 | Distribution and development strategy for Jatropha curcas L. in Yunnan Province, Southwest China显示文摘Yunnan Province is the main distributing area of Jatropha curcas L. This plant is abundant in several drainage areas of the dry-hot, dry-warm and sub-humid valleys in the south subtropical area of Yunnan Province. The seeds that were picked from trees blossoming between April and May and fructifying between September and October will have large seed yield and fine quality. For developing bio-diesel stock forest of J. curcas in areas with adaptive climate, seeding measures for afforestation should be taken and techniques on breeding, fast-growing, and high-yielding plantation cultivation are very important. | Li Kun Yang Wen-yun Li Li Zhang Chun-hua Cui Yong-zhong Sun Yong-yu | 2007 | Forestry Studies in China2007，9，2： | 9 |
| 20 | Synthesis of insecticidal sucrose esters显示文摘Some synthetic sucrose esters (SE) are a relatively new class of insecticidal compounds produced by reacting sugars with fatty acids, which are safe for the environment. Especially, sucrose esters composed of C6–C12 fatty acids have desirable insecticidal properties against many soft-bodied arthropod pests. In our study, sucrose octanoate which has the highest activity against a range of arthropod species was synthesized by a trans-esterification method and proved its insecticidal property. Under the condition of a ho- mogeneous liquid, sucrose octanoate was prepared by reacting ethyl octanoate with sucrose at reduced pressure; the yield was 79.11%. Sucrose octanoate synthesized was identified and its property analyzed by IR, TLC and spectrophotometric analysis. It was shown that the ratio of monoester to polyester in sucrose octanoate was 1.48:1. The insecticidal activity of the synthetic sucrose oc- tanoate was evaluated at a concentration of 4 and 8 mg·mL–1. The mortality of first-instar larvae of Lymantria dispar from its contact toxicity was 72.5% after 36 hours, the revision insect reduced rate of Aphis glycines reached above 80% at 4 and 8 mg·mL–1 after being treated for 5 days. Since the SE products are nontoxic to humans and higher animals, fully biodegradable and hydrolyzed to readily metabolizable sucrose and fatty acid, they are not harmful to crops and appear to be good insecticide candidates. | Song Zi-juan Li Shu-jun Chen Xi Liu Li-mei Song Zhan-qian | 2006 | Forestry Studies in China2006，8，3： | 9 |
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