scholarly journals Structure Determination of a Natural Juvenile Hormone Isolated from a Heteropteran Insect

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Toyomi Kotaki ◽  
Tetsuro Shinada ◽  
Hideharu Numata
Keyword(s):  
Double Bond ◽  
Juvenile Hormone ◽  
Structure Determination ◽  
Stink Bug ◽  
Juvenile Hormone Iii ◽  
Experimental Animals ◽  
Insect Hormones ◽  
Plautia Stali

Juvenile hormone (JH), which occurs in several forms in different insects, is one of the most important insect hormones. The structure of JH in Heteroptera has not been elucidated until recently, although insects in this suborder have long been used as experimental animals for JH research. Here we review the structure determination of a novel JH in a stink bug,Plautia stali, which was named juvenile hormone III skipped bisepoxide [JHSB3: methyl (2R,3S,10R)-2,3;10,11-bisepoxyfarnesoate], based on the arrangement of two epoxides at C2,3 and C10,11 with a skipped double bond at C6,7.

Biological activities of juvenile hormone III skipped bisepoxide in last instar nymphs and adults of a stink bug, Plautia stali

2011 ◽  
Vol 57 (1) ◽  
pp. 147-152 ◽  
Author(s):  
Toyomi Kotaki ◽  
Tetsuro Shinada ◽  
Kanako Kaihara ◽  
Yasufumi Ohfune ◽  
Hideharu Numata
Keyword(s):  
Juvenile Hormone ◽  
Biological Activities ◽  
Stink Bug ◽  
Juvenile Hormone Iii ◽  
Plautia Stali

scholarly journals Structure Determination of Two New Monocillin I Derivatives

2010 ◽  
Vol 5 (5) ◽  
pp. 1934578X1000500
Author(s):  
Jixun Zhan ◽  
E. M. Kithsiri Wijeratne ◽  
A. A. Leslie Gunatilaka
Keyword(s):  
Double Bond ◽  
Acid Solution ◽  
Beauveria Bassiana ◽  
Structure Determination ◽  
Spectroscopic Data ◽  
Enzymatic Process ◽  
Acid Catalyzed ◽  
Hydrolysis Of

Biotransformation of monocillin I (1) by Beauveria bassiana ATCC 7159 was investigated. Two new derivatives 2 and 3 were isolated and identified on the basis of the spectroscopic data. Compounds 2 and 3 are synthesized by hydration at 10,11-double bond and hydrolysis of 14,15-epoxide, respectively. The R configuration of 11-OH in 2 was established by the modified 2-methoxy-2-trifluoromethylphenylacetic acid (MTPA) method. The conversion of 1 to 2 and 3 was reconstituted in an acid solution, indicating that the formation of 2 and 3 is an acid-catalyzed instead of an enzymatic process.

scholarly journals Structure Determination of Juvenile Hormone from Chagas Disease Vectors, Rhodnius prolixus and Triatoma infestans

2020 ◽  
Vol 49 (5) ◽  
pp. 538-541
Author(s):  
Keiji Matsumoto ◽  
Yoko Yasuno ◽  
Kohei Yasuda ◽  
Tsuyoshi Hayashi ◽  
Shin G. Goto ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Chagas Disease ◽  
Structure Determination ◽  
Rhodnius Prolixus ◽  
Triatoma Infestans ◽  
Disease Vectors ◽  
Chagas Disease Vectors

scholarly journals Structure Determination of a New Juvenile Hormone from a Heteropteran Insect

2009 ◽  
Vol 11 (22) ◽  
pp. 5234-5237 ◽  
Author(s):  
Toyomi Kotaki ◽  
Tetsuro Shinada ◽  
Kanako Kaihara ◽  
Yasufumi Ohfune ◽  
Hideharu Numata
Keyword(s):  
Juvenile Hormone ◽  
Structure Determination

Model Vulcanization of EPDM Compounds—Part I: Structure Determination of Vulcanization Products from Ethylidene Norbornane

1984 ◽  
Vol 57 (2) ◽  
pp. 265-274 ◽  
Author(s):  
J. H. M. van den Berg ◽  
J. W. Beulen ◽  
E. F. J. Duynstee ◽  
H. L. Nelissen
Keyword(s):  
Zinc Oxide ◽  
Double Bond ◽  
Stearic Acid ◽  
Structure Determination ◽  
Epdm Rubber

Abstract Vulcanization of ENBH (C9H14), a model for ENB containing EPDM rubber, with a system consisting of zinc oxide, stearic acid, sulfur, TMTD, and MBT at 140°C for 1 h yields slightly more than 30 different crosslinked products C9H13-Sn-C9H13 where n=2,3,4, and 5. In all of the products, the original ENBH structure is maintained (no shift of the double bond) and attachment of the sulfur bridge occurs only at the two allylic positions 3 and 9. Monosulfides (n=1) are probably also formed but no structures could be determined. Only small amounts of the MBT-Sn-C9H13 coupling products and noncrosslinked cyclic sulfides are formed.

Structure–activity relationship of novel juvenile hormone, JHSB3, isolated from the stink bug, Plautia stali

Tetrahedron ◽  
2012 ◽  
Vol 68 (1) ◽  
pp. 106-113 ◽  
Author(s):  
Kanako Kaihara ◽  
Toyomi Kotaki ◽  
Hideharu Numata ◽  
Yasufumi Ohfune ◽  
Tetsuro Shinada
Keyword(s):  
Juvenile Hormone ◽  
Structure Activity Relationship ◽  
Activity Relationship ◽  
Stink Bug ◽  
Structure Activity ◽  
Plautia Stali ◽  
Relationship Of

Ab initio structure determination of cytochrome c6 by combined reciprocal space-real space approach

2003 ◽  
Vol 218 (1) ◽  
Author(s):  
K. Chowdhury ◽  
S. Ghosh ◽  
M. Mukherjee
Keyword(s):  
Cytochrome C ◽  
Ab Initio ◽  
Structure Determination ◽  
Direct Method ◽  
Real Space ◽  
Reciprocal Space ◽  
Cytochrome C6 ◽  
Ab Initio Structure ◽  
Space Approach

AbstractThe direct method program SAYTAN has been applied successfully to redetermine the structure of cytochrome c

Sign in / Sign up

Export Citation Format

Share Document