摘要：
In this work, a highly sensitive and selective optical probe for cysteine was developed using unmodified gold nanoparticles. Quick visual detection depended on the distance-dependent optical properties of gold nanoparticles, the self-assembly of cysteine on the surface of gold nanoparticles, and the chelation in the presence of lead ions. The form of complex could rapidly induced the aggregation of gold nanoparticles, thereby resulting in red-to-blue (or purple) color change. The concentration of cysteine was determined with a limit of detection (LOD) lower than 1 × 10−7 M by the naked eye and could further be monitored by a UV-vis spectrometer easily. The highest selectivity was proved in comparison with other seventeen amino acids and the relative mechanism was detailedly investigated by the addition of ethylenediaminetetraacetate (EDTA).
作者机构：
[Toshiya HIROWATARI] Entomological Laboratory, Graduate School of Life and Environmental Sciences, Osaka Prefecture University;[Guo-Hua HUANG] Institute of Entomology, College of Bio-safety Science and Technology, Hunan Agricultural University;[Min WANG] Department of Entomology, South China Agricultural University
摘要：
A new micropterigid, Vietomartyria gladiator Hirowatari & Huang sp. nov., is described from Nankunshan, Guangdong, China. Two species, Paramartyira jinggangana Yang, 1980 and P. baishanzuna Yang, 1995 are newly transferred to the genus Vietomartyria Hashimoto & Mey, 2000, with the result that the genus now comprises six species. We consider that Vietomartyria gladiator represents the presently known sister-group of a Glade consisting of the other five species. A check list of Vietomartyria is provided.
摘要：
We evaluated the toxicity of chlorantraniliprole against Pieris rapae (L.) (Lepidoptera:Pieridae) on cabbage (Brassicae oleracea variety eapitata L.),and examined the persistence of chlorantraniliprole on field-aged cabbage leaf residues against 5-day-old larvae.Efficacies of chlorantraniliprole and other insecticides to P.rapae (L.) were tested under field conditions for two seasons in Hunan province,south-central China.The LC50 values of chlorantraniliprole by contact for the first to second instar (early) and the third to fourth instar (late) P.rapae were 7.92 and 11.34 mg/l,respectively.The LC50 values of ehlorantraniliprole through ingestion for early and late instar P.rapae were 0.95 and 4.32 mg/l,respectively.The toxicity of chlorantraniliprole on 0 to 28 day-old leaf residues declined gradually under the field conditions.Almost all larvae died on day 5 after being fed with 0 to 21-day-old leaf residues,and the mortalities were as high as 83.3% and 72.5% after being fed with 21-and 25-day-old leaf residues,respectively.With one application,chlorantraniliprole suppressed P.rapae (L.) larvae below the economic threshold for 21-28 days.The results of two field trials showed that chlorantraniliprole applied at 52 mg active ingredient (a.i.)/1 was effective against P.rapae (L.) larvae on cabbage.In addition,we showed that chlorantraniliprole was as effective as indoxacarb and spinosad,and was significantly more effective than emamectin benzoate.These results indicated that it is possible to provide marketable cabbages with three applications of chlorantraniliprole per season.
摘要：
The genus Dinica Gozmany, 1965 is recorded from Sabah, Malaysia. Dinica robinsoni sp. nov. is described and illustrated, as the first record of this genus from Malaysia. The new species is very similar in appearance to Dinica ruiliensis Li et Xiao, 2007, from China and Thailand, but it can be distinguished easily from the latter by the caudo-lateral lobe of the tegumen being knife-shaped, the ship-shaped subscaphium, and the broad, short, pot-shaped saccus.
作者：
Rong Sheng;Min Huang;Heai Xiao*;Tida Ge;Jinshui Wu;...
期刊：
中国农学前沿,2010年4(4):430-437 ISSN：1673-7334
通讯作者：
Heai Xiao
作者机构：
[Xiao H.; Wu J.; Ge T.; Tong C.] Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;[Xie D.] College of Bio-Safety Science and Technology, Hunan Agricultural University, Changsha 410128, China;School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430081, China;[Tan Z.] School of Preclinical Medicine, TCM University of Hunan, Changsha 410208, China;[Sheng R.] Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China, College of Bio-Safety Science and Technology, Hunan Agricultural University, Changsha 410128, China
通讯机构：
[Heai Xiao] K;Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
作者机构：
College of Bio-Safety Science and Technology,Hunan Agricultural University,Changsha 410128,China
会议名称：
第十一届全国农药学科教学科研研讨会
会议时间：
2010-07-01
会议地点：
长沙
会议论文集名称：
第十一届全国农药学科教学科研研讨会论文集
关键词：
Derris cavaleriei vines;Plutella xylostella;antifeedant compounds;isolonchcarpin;magnificol;millettocalyxin C
摘要：
In order to determine the active compounds from Denis cavaleriei vines and their antifeedant activities against Plutella xylostella larvae,the active compounds were isolated by activity-guided fractionation with column chromatography and identified on the basis of MS and NMR data,and antifeedant activity was determined by sandwich method.The results showed that four compounds,isolonchcarpin (A),Magnificol (B),ovalifla,vanone (C) and millettocaiyxin C (D) had been isolated from the plant vines for the first time.Isolonchcarpin,Magnificol and millettocalyxin C had been exhibited antifeeding activity,with AFC50 values of 25.5 mg·L-1,92.8 mg·L-1 and 115.9 mg·L-1 against the third instar larvae of P.xylostella at 48 h after treatment,respectively.The above-mentioned three compounds were main antifeedant compounds derived from the plant vines against P.xylostella.The elucidation of these chemicals is important not only for understanding the insect-plant relationships,but also for their potential in P.xylostella control.
摘要：
A series of new chiral phosphine-aminophosphine ligands have been prepared via a two- or three-step transformation from commercially available and inexpensive (S)-1-phenylethylamine, and successfully used in the rhodium-catalyzed asymmetric hydrogenation of various enamides, beta-dehydroamino acid esters, and dimethyl itaconate. The results show that the ligand structure plays an important influence on both the reactivity and enantioselectivity. Ligand 2d bearing a N-H proton and two F-atoms on the 3,5-positions of the phenyl ring of the aminophosphino moiety was most effective for the hydrogenation of enamides and (Z)-beta-aryl-beta-(acylamino)acrylates, whereas ligand lb showed the highest enantioselectivities in the hydrogenation of (Z)-beta-alkyl-beta-(acylamino)acrylates and dimethyl itaconate. (C) 2010 Elsevier Ltd. All rights reserved.
摘要：
A 3,5-dimethylphenylcarbamate derivative of cellulose immobilized onto the aminopropyl-modified silica gel was used as a chiral stationary phase and separation of five enantiomers was successfully performed by a home-made chiral capillary liquid chromatography system. Different chromatographic parameters such as resolution, column efficiency, and retention time were comparatively investigated using three chiral stationary phases with different coatings. The key factors which may influence the performance of the chiral stationary phases were evaluated by varying the composition of the mobile phase and its flow rate. It was illustrated that the self-installed chiral separation system was characterized by simplicity, high resolution, ease for practical usage, and could be handily applied for enantioseparation at the conventional laboratory.
