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J E Baker - One of the best experts on this subject based on the ideXlab platform.
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stage specific surface chemicals of plodia interpunctella 2 acyl 1 3 Cyclohexanediones from larval mandibular glands serve as cuticular lipids
Comparative Biochemistry and Physiology B, 2004Co-Authors: Ralph W. Howard, J E BakerAbstract:Cuticular lipid compositions of all life stages of the stored product moth Plodia interpunctella have been determined. Eggs and adults of P. interpunctella have cuticular lipids consisting solely of hydrocarbons. The composition of eggs and adult females is qualitatively nearly identical with ca. 86 hydrocarbons (11 n-alkanes, 39 monomethyl alkanes, 19 dimethyl alkanes, 11 trimethyl alkanes and 6 monoenes) except females lack the 2-methyl alkanes found in eggs. Adult males have a hydrocarbon composition qualitatively nearly identical to females with the exception that they lack the monoenes. Larval and pupal cuticular lipids are dominated by a mixture of ca. 20 previously described 2-acyl1,3-Cyclohexanediones, with only minute amounts of n-alkanes on the larvae and pupae. The 2-acyl-1,3-Cyclohexanediones are continuously secreted onto their silk webbing and food particles by the paired mandibular glands found in all larvae. Extracts from dissected mandibular glands have a qualitatively identical composition to larval cuticular extracts. The pupal stage (which does not have mandibular glands) is enclosed in a silk cocoon also coated with 2-acyl-1,3-Cyclohexanediones laid down while the wandering stage larvae spin the cocoon. The 2acyl-1,3-Cyclohexanediones have physical properties which closely mimic those of cuticular hydrocarbons, including melting point and boiling point range and hydrophobicity. This is the first report of an insect with a life stage that does not use conventional cuticular lipids for conservation of water. Published by Elsevier Inc.
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stage specific surface chemicals of plodia interpunctella 2 acyl 1 3 Cyclohexanediones from larval mandibular glands serve as cuticular lipids
Comparative Biochemistry and Physiology B, 2004Co-Authors: Ralph W. Howard, J E BakerAbstract:Abstract Cuticular lipid compositions of all life stages of the stored product moth Plodia interpunctella have been determined. Eggs and adults of P. interpunctella have cuticular lipids consisting solely of hydrocarbons. The composition of eggs and adult females is qualitatively nearly identical with ca. 86 hydrocarbons (11 n-alkanes, 39 monomethyl alkanes, 19 dimethyl alkanes, 11 trimethyl alkanes and 6 monoenes) except females lack the 2-methyl alkanes found in eggs. Adult males have a hydrocarbon composition qualitatively nearly identical to females with the exception that they lack the monoenes. Larval and pupal cuticular lipids are dominated by a mixture of ca. 20 previously described 2-acyl-1,3-Cyclohexanediones, with only minute amounts of n-alkanes on the larvae and pupae. The 2-acyl-1,3-Cyclohexanediones are continuously secreted onto their silk webbing and food particles by the paired mandibular glands found in all larvae. Extracts from dissected mandibular glands have a qualitatively identical composition to larval cuticular extracts. The pupal stage (which does not have mandibular glands) is enclosed in a silk cocoon also coated with 2-acyl-1,3-Cyclohexanediones laid down while the wandering stage larvae spin the cocoon. The 2-acyl-1,3-Cyclohexanediones have physical properties which closely mimic those of cuticular hydrocarbons, including melting point and boiling point range and hydrophobicity. This is the first report of an insect with a life stage that does not use conventional cuticular lipids for conservation of water.
Ralph W. Howard - One of the best experts on this subject based on the ideXlab platform.
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stage specific surface chemicals of plodia interpunctella 2 acyl 1 3 Cyclohexanediones from larval mandibular glands serve as cuticular lipids
Comparative Biochemistry and Physiology B, 2004Co-Authors: Ralph W. Howard, J E BakerAbstract:Cuticular lipid compositions of all life stages of the stored product moth Plodia interpunctella have been determined. Eggs and adults of P. interpunctella have cuticular lipids consisting solely of hydrocarbons. The composition of eggs and adult females is qualitatively nearly identical with ca. 86 hydrocarbons (11 n-alkanes, 39 monomethyl alkanes, 19 dimethyl alkanes, 11 trimethyl alkanes and 6 monoenes) except females lack the 2-methyl alkanes found in eggs. Adult males have a hydrocarbon composition qualitatively nearly identical to females with the exception that they lack the monoenes. Larval and pupal cuticular lipids are dominated by a mixture of ca. 20 previously described 2-acyl1,3-Cyclohexanediones, with only minute amounts of n-alkanes on the larvae and pupae. The 2-acyl-1,3-Cyclohexanediones are continuously secreted onto their silk webbing and food particles by the paired mandibular glands found in all larvae. Extracts from dissected mandibular glands have a qualitatively identical composition to larval cuticular extracts. The pupal stage (which does not have mandibular glands) is enclosed in a silk cocoon also coated with 2-acyl-1,3-Cyclohexanediones laid down while the wandering stage larvae spin the cocoon. The 2acyl-1,3-Cyclohexanediones have physical properties which closely mimic those of cuticular hydrocarbons, including melting point and boiling point range and hydrophobicity. This is the first report of an insect with a life stage that does not use conventional cuticular lipids for conservation of water. Published by Elsevier Inc.
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stage specific surface chemicals of plodia interpunctella 2 acyl 1 3 Cyclohexanediones from larval mandibular glands serve as cuticular lipids
Comparative Biochemistry and Physiology B, 2004Co-Authors: Ralph W. Howard, J E BakerAbstract:Abstract Cuticular lipid compositions of all life stages of the stored product moth Plodia interpunctella have been determined. Eggs and adults of P. interpunctella have cuticular lipids consisting solely of hydrocarbons. The composition of eggs and adult females is qualitatively nearly identical with ca. 86 hydrocarbons (11 n-alkanes, 39 monomethyl alkanes, 19 dimethyl alkanes, 11 trimethyl alkanes and 6 monoenes) except females lack the 2-methyl alkanes found in eggs. Adult males have a hydrocarbon composition qualitatively nearly identical to females with the exception that they lack the monoenes. Larval and pupal cuticular lipids are dominated by a mixture of ca. 20 previously described 2-acyl-1,3-Cyclohexanediones, with only minute amounts of n-alkanes on the larvae and pupae. The 2-acyl-1,3-Cyclohexanediones are continuously secreted onto their silk webbing and food particles by the paired mandibular glands found in all larvae. Extracts from dissected mandibular glands have a qualitatively identical composition to larval cuticular extracts. The pupal stage (which does not have mandibular glands) is enclosed in a silk cocoon also coated with 2-acyl-1,3-Cyclohexanediones laid down while the wandering stage larvae spin the cocoon. The 2-acyl-1,3-Cyclohexanediones have physical properties which closely mimic those of cuticular hydrocarbons, including melting point and boiling point range and hydrophobicity. This is the first report of an insect with a life stage that does not use conventional cuticular lipids for conservation of water.
Nicholas C O Tomkinson - One of the best experts on this subject based on the ideXlab platform.
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a practical procedure for carbonyl α oxidation synthesis of 2 benzoyloxy 1 4 Cyclohexanedione mono ethylene ketal
Organic Syntheses, 2007Co-Authors: Teyrnon C Jones, Nicholas C O TomkinsonAbstract:A convenient method for the prepn. of α-acyloxy ketones is described. Oxyacylation of a variety of ketones with O-acyl hydroxyamine derivs. provided the corresponding α-acyloxy ketones in good yields. (2-Benzoyloxy)-1,4-Cyclohexanedione mono-ethylene ketal was successfully synthesized from 1,4-Cyclohexanedione mono-ethylene ketal.
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Organic Syntheses - A Practical Procedure for Carbonyl α‐Oxidation: Synthesis of (2‐Benzoyloxy)‐1,4‐Cyclohexanedione Mono‐Ethylene Ketal
Organic Syntheses, 2007Co-Authors: Teyrnon C Jones, Nicholas C O TomkinsonAbstract:A convenient method for the prepn. of α-acyloxy ketones is described. Oxyacylation of a variety of ketones with O-acyl hydroxyamine derivs. provided the corresponding α-acyloxy ketones in good yields. (2-Benzoyloxy)-1,4-Cyclohexanedione mono-ethylene ketal was successfully synthesized from 1,4-Cyclohexanedione mono-ethylene ketal.
Teyrnon C Jones - One of the best experts on this subject based on the ideXlab platform.
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a practical procedure for carbonyl α oxidation synthesis of 2 benzoyloxy 1 4 Cyclohexanedione mono ethylene ketal
Organic Syntheses, 2007Co-Authors: Teyrnon C Jones, Nicholas C O TomkinsonAbstract:A convenient method for the prepn. of α-acyloxy ketones is described. Oxyacylation of a variety of ketones with O-acyl hydroxyamine derivs. provided the corresponding α-acyloxy ketones in good yields. (2-Benzoyloxy)-1,4-Cyclohexanedione mono-ethylene ketal was successfully synthesized from 1,4-Cyclohexanedione mono-ethylene ketal.
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Organic Syntheses - A Practical Procedure for Carbonyl α‐Oxidation: Synthesis of (2‐Benzoyloxy)‐1,4‐Cyclohexanedione Mono‐Ethylene Ketal
Organic Syntheses, 2007Co-Authors: Teyrnon C Jones, Nicholas C O TomkinsonAbstract:A convenient method for the prepn. of α-acyloxy ketones is described. Oxyacylation of a variety of ketones with O-acyl hydroxyamine derivs. provided the corresponding α-acyloxy ketones in good yields. (2-Benzoyloxy)-1,4-Cyclohexanedione mono-ethylene ketal was successfully synthesized from 1,4-Cyclohexanedione mono-ethylene ketal.
Rikard C Unelius - One of the best experts on this subject based on the ideXlab platform.
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preparation characterization and application of a stationary chromatographic phase from a new tartaric acid derivative
Tetrahedron Letters, 2010Co-Authors: Sacha Legrand, Harri Heikkinen, Ian A Nicholls, Andrew Root, Rikard C Unelius, Johan SvensonAbstract:The preparation, characterization and application of a new stationary phase derived from 1,4-Cyclohexanedione and diethyl (+)-tartrate are described. A suitable TADDOL for immobilization has been s ...
