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Journal articles on the topic 'Methyl branched'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Dickschat, Jeroen S., Hilke Bruns, and Ramona Riclea. "Novel fatty acid methyl esters from the actinomyceteMicromonospora aurantiaca." Beilstein Journal of Organic Chemistry 7 (December 20, 2011): 1697–712. http://dx.doi.org/10.3762/bjoc.7.200.

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The volatiles released byMicromonospora aurantiacawere collected by means of a closed-loop stripping apparatus (CLSA) and analysed by GC–MS. The headspace extracts contained more than 90 compounds from different classes. Fatty acid methyl esters (FAMEs) comprised the major compound class including saturated unbranched, monomethyl and dimethyl branched FAMEs in diverse structural variants: Unbranched, α-branched, γ-branched, (ω−1)-branched, (ω−2)-branched, α- and (ω−1)-branched, γ- and (ω−1)-branched, γ- and (ω−2)-branched, and γ- and (ω−3)-branched FAMEs. FAMEs of the last three types have not

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2

Dewulf, Joseph P., Isabelle Gerin, Mark H. Rider, Maria Veiga-da-Cunha, Emile Van Schaftingen, and Guido T. Bommer. "The synthesis of branched-chain fatty acids is limited by enzymatic decarboxylation of ethyl- and methylmalonyl-CoA." Biochemical Journal 476, no. 16 (2019): 2427–47. http://dx.doi.org/10.1042/bcj20190500.

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Abstract Most fatty acids (FAs) are straight chains and are synthesized by fatty acid synthase (FASN) using acetyl-CoA and malonyl-CoA units. Yet, FASN is known to be promiscuous as it may use methylmalonyl-CoA instead of malonyl-CoA and thereby introduce methyl-branches. We have recently found that the cytosolic enzyme ECHDC1 degrades ethylmalonyl-CoA and methylmalonyl-CoA, which presumably result from promiscuous reactions catalyzed by acetyl-CoA carboxylase on butyryl- and propionyl-CoA. Here, we tested the hypothesis that ECHDC1 is a metabolite repair enzyme that serves to prevent the form

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3

Ando, Tetsu, and Rei Yamakawa. "Chiral methyl-branched pheromones." Natural Product Reports 32, no. 7 (2015): 1007–41. http://dx.doi.org/10.1039/c4np00138a.

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A large number of chiral methyl-branched pheromones have been identified reflecting the diversity of insect species. This review deals with mainly non-terpene compounds, highlighting studies on the identification, stereoselective synthesis, and biosynthesis carried out this century.

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4

Yasugi, E., T. Kasama, M. Shibahara, and Y. Seyama. "Composition of long-chain bases in sphingomyelin of the guinea pig Harderian gland." Biochemistry and Cell Biology 68, no. 1 (1990): 154–60. http://dx.doi.org/10.1139/o90-021.

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Sphingomyelin from the guinea pig Harderian gland was isolated and characterized. The purified sphingomyelin gave a broad spot on thin-layer chromatography. The fatty acid composition of the whole sphingomyelin was 71% nonhydroxy acids and 29% 2-hydroxy acids. Methyl-branched fatty acids were only 2% of the total acids. The long-chain bases were composed of straight-chain sphingenines (50%) and sphinganines (6%). Methyl-branched long-chain bases were 44% of the bases. The sphingomyelin was further separated into four fractions (I, II, III, IV) by high-performance liquid chromatography. The rat

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5

Otero, Iran, Holger Feist, Lidcay Herrera, Manfred Michalik, José Quincoces, and Klaus Peseke. "Nucleoside Analogues from Branched-Chain Pyranosides." Australian Journal of Chemistry 58, no. 2 (2005): 104. http://dx.doi.org/10.1071/ch04168.

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Reaction of (pyranosid-3-yl)ethanal 2 with ethynylmagnesium bromide or lithium phenylacetylide in THF afforded (2R,S)-1-(methyl 2-O-benzyl-4,6-O-benzylidene-3-deoxy-α-d-altropyranosid-3-yl)but-3-yn-2-ols 3a and 3b, respectively. Oxidation of 3a and 3b yielded the 1-(methyl 2-O-benzyl-4,6-O-benzylidene-3-deoxy-α-d-altropyranosid-3-yl)but-3-yn-2-ones 4a and 4b, which upon treatment with hydrazine and hydrazine derivatives formed the 3-(methyl 2-O-benzyl-4,6-O-benzylidene-3-deoxy-α-d-altropyranosid-3-ylmethyl)pyrazoles 5a–5d. Compounds 4a and 4b also underwent reaction with amidinium and guanidin

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6

Abrams, Suzanne R. "Isomerization of alkyl branched alkynoic acids." Canadian Journal of Chemistry 64, no. 3 (1986): 457–63. http://dx.doi.org/10.1139/v86-071.

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Acetylenic acids are isomerized by alkali metal amides of 1,3-diaminopropane to 3,5-dienoic acids. An acid with a methyl branch at C-3 separating the carboxyl from the triple bond is rearranged to a mixture of the terminal alkynoic acid and two isomeric 3,5-dienoic acids. The corresponding 4-methyl compound affords the terminal alkynoic acid, one 3,5-dienoic acid, and two cyclized products, cis- and trans-3-methyl-5-(octylidene)-1-cyclopentanecarboxylic acids. Propargylic acids branched at C-5 and C-6 are rearranged to the appropriately substituted 3,5-dienoic acids in moderate yield.

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7

Fraatz, Marco Alexander, Michael Goldmann, Torsten Geissler, et al. "Biotechnological Production of Methyl-Branched Aldehydes." Journal of Agricultural and Food Chemistry 66, no. 10 (2016): 2387–92. http://dx.doi.org/10.1021/acs.jafc.6b04793.

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8

Neng, Wen-Bo, Wen-Guang Xie, Bo Lu, et al. "Biodegradable thermoplastic copolyester elastomers: Methyl branched PBAmT." e-Polymers 21, no. 1 (2021): 336–45. http://dx.doi.org/10.1515/epoly-2021-0024.

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Abstract A series of novel biodegradable copolyesters named poly(butylene 3-methyl adipate co-terephthalate) (PBAmT) were synthesized from the monomers of 3-methyl adipic acid (AAm), 1,4-butanediol (BDO), and terephthalic acid (TPA) through a process of esterification and polycondensation. 1H NMR analysis shows that they are random copolymers whose composition can be well controlled by the feed ratio of monomers. From the results of DSC and XRD, the introduction of methyl group successfully destroys the crystallizability of the PBAm chains, thus making it become a relative soft segment compare

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9

Ding, S., Y. Xu, Y. Wang, et al. "Distribution of branched glycerol dialkyl glycerol tetraethers in surface soils of the Qinghai–Tibetan Plateau: implications of brGDGTs-based proxies in cold and dry regions." Biogeosciences 12, no. 11 (2015): 3141–51. http://dx.doi.org/10.5194/bg-12-3141-2015.

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Abstract. The methylation index of branched tetraethers (MBT) and cyclization ratio of branched tetraethers (CBT) based on the distribution of branched glycerol dialkyl glycerol tetraethers (brGDGT) are useful proxies for the reconstruction of mean annual air temperature (MAT) and soil pH. Recently, a series of 6-methyl brGDGTs were identified which were previously co-eluted with 5-methyl brGDGTs. However, little is known about 6-methyl brGDGTs in the Qinghai–Tibetan Plateau (QTP), a critical region of the global climate system. Here, we analyze 30 surface soils covering a large area of the QT

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10

Yu, Chao-Mei, Ziba R. Fathi-Afshar, Jonathan M. Curtis, Jeffrey L. C. Wright, and Stephen W. Ayer. "An unusual fatty acid and its glyceride from the marine fungus Microsphaeropis olivacea." Canadian Journal of Chemistry 74, no. 5 (1996): 730–35. http://dx.doi.org/10.1139/v96-079.

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Two new metabolites (1 and 2) were isolated from the marine fungus Microsphaeropsis olivacea. The structures were elucidated, through analysis of the spectroscopic data, as an unusual methyl-branched unsaturated fatty acid, 10-methyl-9Z-octadecenoic acid (1), and the glyceride (2). The locations of the double bond and the methyl branching were determined from the electron impact (EI) mass spectrum of the picolinyl derivative of 1 and from MS/MS data on the hydrogenation products of 1 and 2. Key words: Microsphaeropsis olivacea, marine fungus, methyl-branched unsaturated fatty acid, picolinyl e

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11

Dos Santos, Claudio G., Aubrey D. Jenkins, David R. M. Walton, Jaroslav Stejskal, and Pavel Kratochvíl. "The Synthesis of Branched Poly(methyl methacrylate)." Collection of Czechoslovak Chemical Communications 58, no. 11 (1993): 2523–34. http://dx.doi.org/10.1135/cccc19932523.

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12

Bouisset, Tony, Gilles Gosselin, Ludovic Griffe, Jean-Christophe Meillon, and Richard Storer. "Synthesis of 2′-C-methyl-branched isonucleosides." Tetrahedron 64, no. 28 (2008): 6657–61. http://dx.doi.org/10.1016/j.tet.2008.05.022.

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13

Minnikin, David E., Laurent Kremer, Lynn G. Dover, and Gurdyal S. Besra. "The Methyl-Branched Fortifications of Mycobacterium tuberculosis." Chemistry & Biology 9, no. 5 (2002): 545–53. http://dx.doi.org/10.1016/s1074-5521(02)00142-4.

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14

Sakai, Yasuyoshi, Hironori Takahashi, Yuori Wakasa та ін. "Role of α-Methylacyl Coenzyme A Racemase in the Degradation of Methyl-Branched Alkanes by Mycobacterium sp. Strain P101". Journal of Bacteriology 186, № 21 (2004): 7214–20. http://dx.doi.org/10.1128/jb.186.21.7214-7220.2004.

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ABSTRACT A new isolate, Mycobacterium sp. strain P101, is capable of growth on methyl-branched alkanes (pristane, phytane, and squalane). Among ca. 10,000 Tn5-derived mutants, we characterized 2 mutants defective in growth on pristane or n-hexadecane. A single copy of Tn5 was found to be inserted into the coding region of mcr (α-methylacyl coenzyme A [α-methylacyl-CoA] racemase gene) in mutant P1 and into the coding region of mls (malate synthase gene) in mutant H1. Mutant P1 could not grow on methyl-branched alkanes. The recombinant Mcr produced in Escherichia coli was confirmed to catalyze r

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15

Kordian, Marcus, Holger Feist, Willi Kantlehner, Manfred Michalik, and Klaus Peseke. "Nucleoside Analogues from Push-Pull Functionalized Branched-Chain Pyranosides." Zeitschrift für Naturforschung B 61, no. 4 (2006): 406–12. http://dx.doi.org/10.1515/znb-2006-0406.

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The reaction of methyl 4,6-O-benzylidene-2-deoxy-α-D-erythro-hexopyranosid-3-ulose (1) with ethynylmagnesium bromide in tetrahydrofuran and subsequent trimethylsilylation yielded the methyl 4,6-O-benzylidene-2-deoxy-3-C-ethynyl-3-O-trimethylsilyl-α-D-ribo-hexopyranoside (3). Push-pull functionalization of 3 with N,N,N′,N′,N″,N″-hexamethylguanidinium chloride under basic conditions and following deprotection afforded the spiro{2,5-dihydro-3-dimethylamino- furan-2,8’-4’,4’a,6’,7’,8’,8’a-hexahydro-6’-methoxy-2’-phenyl-pyrano[3,2-d][1.3]dioxine}- 5-ylidenemalononitrile (9). Furthermore, compound 1

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16

Tsitko, Irina V., Gennadi M. Zaitsev, Anatoli G. Lobanok, and Mirja S. Salkinoja-Salonen. "Effect of Aromatic Compounds on Cellular Fatty Acid Composition of Rhodococcus opacus." Applied and Environmental Microbiology 65, no. 2 (1999): 853–55. http://dx.doi.org/10.1128/aem.65.2.853-855.1999.

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ABSTRACT In cells of Rhodococcus opacus GM-14, GM-29, and 1CP, the contents of branched (10-methyl) fatty acids increased from 3% to 15 to 34% of the total fatty acids when the cells were grown on benzene, phenol, 4-chlorophenol, chlorobenzene, or toluene as the sole source of carbon and energy, in comparison with cells grown on fructose. In addition, the content of trans-hexadecenoic acid increased from 5% to 8 to 18% with phenol or chlorophenol as the carbon source. The 10-methyl branched fatty acid content of R. opacus GM-14 cells increased in a dose-related manner following exposure to phe

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17

ter Schure, Eelko G., Marcel T. Flikweert, Johannes P. van Dijken, Jack T. Pronk, and C. Theo Verrips. "Pyruvate Decarboxylase Catalyzes Decarboxylation of Branched-Chain 2-Oxo Acids but Is Not Essential for Fusel Alcohol Production by Saccharomyces cerevisiae." Applied and Environmental Microbiology 64, no. 4 (1998): 1303–7. http://dx.doi.org/10.1128/aem.64.4.1303-1307.1998.

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ABSTRACT The fusel alcohols 3-methyl-1-butanol, 2-methyl-1-butanol, and 2-methyl-propanol are important flavor compounds in yeast-derived food products and beverages. The formation of these compounds from branched-chain amino acids is generally assumed to occur via the Ehrlich pathway, which involves the concerted action of a branched-chain transaminase, a decarboxylase, and an alcohol dehydrogenase. Partially purified preparations of pyruvate decarboxylase (EC 4.1.1.1 ) have been reported to catalyze the decarboxylation of the branched-chain 2-oxo acids formed upon transamination of leucine,

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18

Isaure, Françoise, Peter A. G. Cormack, and David C. Sherrington. "Facile synthesis of branched poly(methyl methacrylate)s." J. Mater. Chem. 13, no. 11 (2003): 2701–10. http://dx.doi.org/10.1039/b303321j.

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19

Kurmaz, S. V., V. V. Nedel’ko, E. O. Perepelitsina, M. P. Berezin, and A. A. Baturina. "Branched poly(methyl methacrylates) modified by C60 fullerenes." Russian Journal of General Chemistry 83, no. 3 (2013): 496–509. http://dx.doi.org/10.1134/s107036321303016x.

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20

Juarez, M. Patricia, Sixta Ayala, and Rodolfo R. Brenner. "Methyl-branched fatty acid biosynthesis in Triatoma infestans." Insect Biochemistry and Molecular Biology 26, no. 6 (1996): 599–605. http://dx.doi.org/10.1016/s0965-1748(96)00021-5.

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21

Dailey, Oliver D., and Nicolette Prevost. "Conversion of Methyl Oleate to Branched-Chain Derivatives." Journal of the American Oil Chemists' Society 84, no. 6 (2007): 565–71. http://dx.doi.org/10.1007/s11746-007-1077-x.

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22

Dobner, B., and P. Nuhn. "Syntheses of deuterium-labelled methyl branched fatty acids." Chemistry and Physics of Lipids 60, no. 1 (1991): 21–28. http://dx.doi.org/10.1016/0009-3084(91)90011-y.

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23

Krishna, K. P., P. B. Sandhyasri, K. Anitha, G. R. Babu, K. R. Kumar, and R. R. Raju. "Excess Thermodynamic Properties of Binary Mixtures of Dimethyl Malonate with some Branched Alkanols." Journal of Scientific Research 14, no. 3 (2022): 931–41. http://dx.doi.org/10.3329/jsr.v14i3.57976.

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The intermolecular hydrogen bond interactions in the dimethyl malonate with some branched alkanols (2-methyl-1-propanol, 2-propanol, and 2-butanol) binary mixture have been studied experimentally and theoretically. The ultrasonic velocities U, densities ρ of binary mixtures of dimethyl malonate with 2-methyl-1-propanol, 2-propanol, 2-butanol from 303.15 K to 318.15 K were measured. Excess molar volume (VE), deviation in adiabatic compressibility (Δβad) and excess intermolecular free length ( LEf) have been calculated from the measured experimental data. It is observed that the order of interac

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24

Lu, Boqiong, Jinlong Li, Guangqiang Lv, et al. "Obtaining a high value branched bio-alkane from biomass-derived levulinic acid using RANEY® as hydrodeoxygenation catalyst." RSC Advances 6, no. 96 (2016): 93956–62. http://dx.doi.org/10.1039/c6ra14625b.

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A high value branched angelica lactone bio-alkane from biomass-derived levulinic acid gives nearly 90% hydrodeoxygenation yield under 483 K and 5 MPa H2 and the C10 branched alkane product, 3-ethyl-4-methyl heptane, accounts for 75% of the same.

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25

FERNÁNDEZ-GARCÍA, ESTRELLA, MARÍA CARBONELL, and MANUEL NUÑEZ. "Volatile fraction and sensory characteristics of Manchego cheese. 1. Comparison of raw and pasteurized milk cheese." Journal of Dairy Research 69, no. 4 (2002): 579–93. http://dx.doi.org/10.1017/s0022029902005794.

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Manchego cheese can be manufactured from raw or pasteurized ewes' milk. An automatic purge and trap apparatus, coupled to a GC-MS was used to isolate, identify and compare the relative amounts of the volatile components of raw and pasteurized Manchego cheese during ripening. The majority of volatile compounds were more abundant in raw milk (RM) cheeses than in pasteurized milk (PM) cheeses. Alcohols and esters predominated in the profile of RM Manchego cheese, while methyl-ketones and 2,3-butanedione were quantitatively important in PM cheeses. Branched chain alcohols were much more abundant i

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26

Dembitsky, Valery. "Hydrobiological Aspects of Saturated, Methyl-Branched, and Cyclic Fatty Acids Derived from Aquatic Ecosystems: Origin, Distribution, and Biological Activity." Hydrobiology 1, no. 1 (2022): 89–110. http://dx.doi.org/10.3390/hydrobiology1010007.

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This review focuses on the hydrobiological aspects of saturated, methyl-branched, and cyclic fatty acids (FA) derived from aquatic ecosystems. This short review presents the distribution of about 60 FA in various living organisms inhabiting the aquatic environment as well as in marine and freshwater sediments. In addition, it is important to determine the biological activity of saturated, methyl-branched, and cyclic fatty acids. An interesting finding was that some cyclic FA show antiplatelet activity. The generalized and presented data are of interest to hydrobiologists, chemists, and pharmac

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27

Shen, Wei, Xiang Hao, Yong Shi, and Wei-Sheng Tian. "Synthesis of (6R,12R)-6,12-Dimethylpentadecan-2-one, the Female-Produced Sex Pheromone from Banded Cucumber Beetle Diabrotica balteata, Based on a Chiron Approach." Natural Product Communications 10, no. 12 (2015): 1934578X1501001. http://dx.doi.org/10.1177/1934578x1501001236.

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Herein we describe a synthesis of (6 R,12 R)-6,12-dimethylpentadecan-2-one (5), the female produced sex pheromone of banded cucumber beetle Diabrotica balteata Le Conte, from ( R)-4-methyl-δ-valerolactone, a methyl-branched chiron.

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28

Zhang, Lu, Yongqiang Sun, Martino Di Serio, et al. "The Performance Comparison Of Branched Methyl Stearate Ethoxylate and Linear Methyl Stearate Ethoxylate." Tenside Surfactants Detergents 56, no. 4 (2019): 327–32. http://dx.doi.org/10.3139/113.110634.

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29

Zhang, B., R. Paxton, G. W. Goodwin, Y. Shimomura, and R. A. Harris. "Preservation of the activity state of hepatic branched-chain 2-oxo acid dehydrogenase during the isolation of mitochondria." Biochemical Journal 246, no. 3 (1987): 625–31. http://dx.doi.org/10.1042/bj2460625.

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A comparison was conducted of current methods for estimation of the activity states (proportion of enzyme in active, dephosphorylated, form) of hepatic branched-chain 2-oxo acid dehydrogenase. Practically all of the enzyme was active in freeze-clamped liver obtained from chow-fed and 48 h-starved rats, regardless of the presence of fluoride in the extraction and assay media to inhibit phosphatase activity. Likewise, the enzyme was almost completely active in mitochondria isolated by a conventional method from livers of chow-fed and starved rats. However, when fluoride and 4-methyl-2-oxopentano

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30

Franzoni, Ivan, Laure Guénée та Clément Mazet. "A general Pd-catalyzed α- and γ-benzylation of aldehydes for the formation of quaternary centers". Organic & Biomolecular Chemistry 13, № 22 (2015): 6338–43. http://dx.doi.org/10.1039/c5ob00702j.

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31

Balthasar, D. M., D. A. Cadenhead, R. N. A. H. Lewis, and R. N. McElhaney. "Monomolecular film behavior of methyl anteiso-branched-chain phosphatidylcholines." Langmuir 4, no. 1 (1988): 180–86. http://dx.doi.org/10.1021/la00079a033.

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32

Schumacher, Katja, Sven Asche, Martin Heil, Frank Mittelstädt, Helmut Dietrich, and Armin Mosandl. "Methyl-Branched Flavor Compounds in Fresh and Processed Apples." Journal of Agricultural and Food Chemistry 46, no. 11 (1998): 4496–500. http://dx.doi.org/10.1021/jf980574b.

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Suen, Yu, Gunther U. Holzer, Jerry S. Hubbard, and Thomas G. Tornabene. "Biosynthesis of acyclic methyl branched polyunsaturated hydrocarbons inPseudomonas maltophilia." Journal of Industrial Microbiology 2, no. 6 (1988): 337–48. http://dx.doi.org/10.1007/bf01569572.

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Voronkov, M. G., L. V. Klyba, S. V. Basenko, R. G. Mirskov, and V. N. Bochkarev. "Mass spectra of linear and branched methyl(vinyl)siloxanes." Russian Chemical Bulletin 48, no. 1 (1999): 114–16. http://dx.doi.org/10.1007/bf02494411.

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Knapp, F. F., K. R. Ambrose, and M. M. Goodman. "New radioiodinated methyl-branched fatty acids for cardiac studies." European Journal of Nuclear Medicine 12, S1 (1986): S39—S44. http://dx.doi.org/10.1007/bf00258103.

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36

Morr, Michael, Jens Fortkamp, and Stefan Rühe. "Chiral Methyl-Branched Surfactants and Phospholipids: Synthesis and Properties." Angewandte Chemie International Edition in English 36, no. 22 (1997): 2460–62. http://dx.doi.org/10.1002/anie.199724601.

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37

Jackson, Christian, Yuan-Ju Chen, and Jimmy W. Mays. "Dilute solution properties of randomly branched poly(methyl methacrylate)." Journal of Applied Polymer Science 59, no. 1 (1996): 179–88. http://dx.doi.org/10.1002/(sici)1097-4628(19960103)59:1<179::aid-app23>3.0.co;2-u.

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38

Peram, Pardha Saradhi, Miguel Vences, and Stefan Schulz. "A synthetic dodecanolide library for the identification of putative semiochemicals emitted by mantellid frogs." Organic & Biomolecular Chemistry 15, no. 33 (2017): 6967–77. http://dx.doi.org/10.1039/c7ob00849j.

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39

Cravo-Laureau, Cristiana, Vincent Grossi, Danielle Raphel, Robert Matheron, and Agnès Hirschler-Réa. "Anaerobic n-Alkane Metabolism by a Sulfate-Reducing Bacterium, Desulfatibacillum aliphaticivorans Strain CV2803T." Applied and Environmental Microbiology 71, no. 7 (2005): 3458–67. http://dx.doi.org/10.1128/aem.71.7.3458-3467.2005.

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ABSTRACT The alkane-degrading, sulfate-reducing bacterium Desulfatibacillum aliphaticivorans strain CV2803T, recently isolated from marine sediments, was investigated for n-alkane metabolism. The total cellular fatty acids of this strain had predominantly odd numbers of carbon atoms (C odd) when the strain was grown on a C-odd alkane (pentadecane) and even numbers of carbon atoms (C even) when it was grown on a C-even alkane (hexadecane). Detailed analyses of those fatty acids by gas chromatography/mass spectrometry allowed us to identify saturated 2-, 4-, 6-, and 8-methyl- and monounsaturated

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40

Poinsot, Véréna, Elaine Bélanger, Serge Laberge та ін. "Unusual Methyl-Branched α,β-Unsaturated Acyl Chain Substitutions in the Nod Factors of an Arctic Rhizobium,Mesorhizobium sp. Strain N33 (Oxytropis arctobia)". Journal of Bacteriology 183, № 12 (2001): 3721–28. http://dx.doi.org/10.1128/jb.183.12.3721-3728.2001.

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ABSTRACT Mesorhizobium sp. strain N33 (Oxytropis arctobia), a rhizobial strain isolated in arctic Canada, is able to fix nitrogen at very low temperatures in association with a few arctic legume species belonging to the genera Astragalus, Onobrychis, and Oxytropis. Using mass spectrometry and nuclear magnetic resonance spectroscopy, we have determined the structure of N33 Nod factors, which are major determinants of nodulation. They are pentameric lipochito-oligosaccharides 6-O sulfated at the reducing end and exhibit other original substitutions: 6-O acetylation of the glucosamine residue nex

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Hammerschick, Tim, and Walter Vetter. "Profiling and Isolation of Ten Rare Branched-Chain Alkylresorcinols in Quinoa." Molecules 28, no. 13 (2023): 5220. http://dx.doi.org/10.3390/molecules28135220.

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Alkylresorcinols (∑ARs) are bioactive lipid compounds predominantly found in cereals. These amphiphilic compounds exist in a high structural diversity and can be divided into two main groups, i.e., 5-alkylresorcinols (ARs) and 2-methyl-5-alkylresorcinols (mARs). The pseudocereal quinoa has a very unique AR profile, consisting not only of straight-chain alkyl chains but also iso- and anteiso-branched isomers. Here, we describe a method for the isolation of such methyl-branched ARs and mARs from quinoa. The enrichment of the ∑AR fraction from the lipid extracts by centrifugal partition chromatog

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Hildebrandt, E. F., D. B. Buxton, and M. S. Olson. "Acute regulation of the branched-chain 2-oxo acid dehydrogenase complex by adrenaline and glucagon in the perfused rat heart." Biochemical Journal 250, no. 3 (1988): 835–41. http://dx.doi.org/10.1042/bj2500835.

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Rates of transamination and decarboxylation of [1-14C]leucine at a physiological concentration (0.1 mM) were measured in the perfused rat heart. In hearts from fasted rats, metabolic flux through the branched-chain 2-oxo acid dehydrogenase reaction was low initially, but increased gradually during the perfusion period. The increase in 14CO2 production was accompanied by an increase in the amount of active branched-chain 2-oxo acid dehydrogenase complex present in the tissue. In hearts from rats fed ad libitum, extractable branched-chain dehydrogenase activity was low initially, but increased r

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Komatsu, H., T. Baba, T. Takagi, T. Kanamori, and K. Sakai. "1P223 Synthesis and characterization of branched model lipids(2) : Effects of methyl branches on lamellar structures." Seibutsu Butsuri 44, supplement (2004): S85. http://dx.doi.org/10.2142/biophys.44.s85_3.

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Liao, Mengchen, Yang Chen, and Michael A. Brook. "Spatially Controlled Highly Branched Vinylsilicones." Polymers 13, no. 6 (2021): 859. http://dx.doi.org/10.3390/polym13060859.

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Branched silicones possess interesting properties as oils, including their viscoelastic behavior, or as precursors to controlled networks. However, highly branched silicone polymers are difficult to form reliably using a “grafting to” strategy because functional groups may be bunched together preventing complete conversion for steric reasons. We report the synthesis of vinyl-functional highly branched silicone polymers based, at their core, on the ability to spatially locate functional vinyl groups along a silicone backbone at the desired frequency. Macromonomers were created and then polymeri

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Xiao, Wenjie, Yasong Wang, Yongsheng Liu, Xi Zhang, Linlin Shi, and Yunping Xu. "Predominance of hexamethylated 6-methyl branched glycerol dialkyl glycerol tetraethers in the Mariana Trench: source and environmental implication." Biogeosciences 17, no. 7 (2020): 2135–48. http://dx.doi.org/10.5194/bg-17-2135-2020.

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Abstract. Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are useful molecular indicators for organic carbon (OC) sources and the paleoenvironment. Their application in marine environments, however, is complicated because of a mixed terrestrial and marine source. Here, we examined brGDGTs in sediments from the Mariana Trench, the deepest ocean without significant terrestrial influence. Our result shows a strong predominance of hexamethylated 6-methyl brGDGT (IIIa′) (73.40±2.39 % of total brGDGTs) and an absence of 5-methyl brGDGTs, different from previously reported soils and marine s

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Nelson, Dennis R., Mertxe de Renobales, Lawrence A. Dwyer, Anthony C. Zamboni, Charlotte L. Fatland, and Gary J. Blomquist. "Novel very long-chain methyl-branched alcohols and their esters, and methyl-branched alkanes in pupae of the cabbage looper, Trichoplusia ni (Hubner)." Insect Biochemistry 19, no. 2 (1989): 197–208. http://dx.doi.org/10.1016/0020-1790(89)90092-9.

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Park, Soo J., Gunjan Pandey, Cynthia Castro-Vargas, John G. Oakeshott, Phillip W. Taylor, and Vivian Mendez. "Cuticular Chemistry of the Queensland Fruit Fly Bactrocera tryoni (Froggatt)." Molecules 25, no. 18 (2020): 4185. http://dx.doi.org/10.3390/molecules25184185.

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The cuticular layer of the insect exoskeleton contains diverse compounds that serve important biological functions, including the maintenance of homeostasis by protecting against water loss, protection from injury, pathogens and insecticides, and communication. Bactrocera tryoni (Froggatt) is the most destructive pest of fruit production in Australia, yet there are no published accounts of this species’ cuticular chemistry. We here provide a comprehensive description of B. tryoni cuticular chemistry. We used gas chromatography-mass spectrometry to identify and characterize compounds in hexane

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Prakoso, Tirto, Tatang H. Soerawidjaja, and Yoel Pasae. "Pembuatan asam lemak bercabang dari minyak kepoh." Jurnal Teknik Kimia Indonesia 4, no. 1 (2018): 167. http://dx.doi.org/10.5614/jtki.2005.4.1.6.

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Oil from kepoh tree (Sterculiafoetida L.) seed kernel is a unique oil because it contains fatty acid which has a cyclopropenoid groups and has almost 90% of composition of the oil. The acid is called sterculic acid which has molecular formula C19H34O2. The fatty acids and derivates has an advance characteristic when it is used as cosmetics, lubricants, paint and plastic products. Its branched alcohol ester is expected as an additives for pour point depressant in fuel or lubricant. In this research, the sterculic acid has possibility to be converted to branched fatty acid methyl ester that is 1

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Garten, Matthias, Coline Prévost, Clotilde Cadart та ін. "Methyl-branched lipids promote the membrane adsorption of α-synuclein by enhancing shallow lipid-packing defects". Physical Chemistry Chemical Physics 17, № 24 (2015): 15589–97. http://dx.doi.org/10.1039/c5cp00244c.

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Hu, Haibin, Darui Chen, Haiyang Gao, Liu Zhong, and Qing Wu. "Amine–imine palladium catalysts for living polymerization of ethylene and copolymerization of ethylene with methyl acrylate: incorporation of acrylate units into the main chain and branch end." Polymer Chemistry 7, no. 3 (2016): 529–37. http://dx.doi.org/10.1039/c5py01743b.

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A bulky amine–imine palladium catalyst can polymerize ethylene in a living fashion. Copolymerizations of ethylene and methyl acrylate afford branched copolymers with terminal and main chain acrylate units.

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