Category: 13099-34-8

Goni, Miguel A. published the artcileThe diagenetic behavior of cutin acids in buried conifer needles and sediments from a coastal marine environment, Name: 17-Hydroxyheptadecanoic acid, the main research area is cutin acid diagenesis coastal sediment; diagenesis cutin acid forest litter; conifer needle cutin acid composition; fatty acid diagenesis needle sediment.

Whole green, litter, and sedimentary fir, hemlock, and cedar needles and bulk sediments collected from the Dabob Bay region in Washington State were analyzed for their cutin-derived CuO reaction products. All samples yielded dihydroxyhexadecanoic acid isomers (x,ω-C16), 16-hydroxyhexadecanoic acid (ω-C16), 14-hydroxytetradecanoic acid (ω-C14), and 18-hydroxyoctadec-9-enoic acid (ω-C18:1) as the major cutin acids. Fir/hemlock needle mixtures were characterized by a high abundance of the 9,16-dihydroxyhexadecanoic acid positional isomer, while cedar needles produced primarily the 10,16-dihydroxy counterpart. Cutin acids accounted for ∼3% of tissue C in green needles, ∼4% in needle litter, 0.5-1.5% in sedimentary needles, and ∼0.1% of the organic C (OC) in bulk sediments. Approx. 80% of the original cutin acids in fresh green needles were lost from the deepest (∼100 yr old) sedimentary tissues. Cutin was more active than lignin and polysaccharides, but more stable than the cyclitol components of the same needles. Comparative diagenetic losses of the individual cutin acids were not uniform and suggest that addnl. hydroxy groups and the presence of C double bonds both increase overall reactivity. The relative stability series derived for all the mol. constituents measured is: total vanillyl phenols > total p-hydroxy phenols, ferulic acid, most aldoses, bulk organic matter > mannose, ω-C14, ω-C16 ≥ ω-C18:1 > glucose, p-coumaric acid, x,ω-C16 > all cyclitols. Diagenetically induced changes in the various cutin parameters used to characterize nonwoody vascular plant tissues were not large enough to confuse degraded conifer tissues with other cutin sources. Based on these trends, the finely disseminated cutin-bearing tissues in Dabob Bay sediments appear to be comprised approx. of equal amounts of highly degraded fir/hemlock and cedar needle fragments. According to this estimate, nonwoody vascular plant debris accounted for ∼15% of the total organic matter present in these sediments.

Geochimica et Cosmochimica Acta published new progress about Bay sediments. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, Name: 17-Hydroxyheptadecanoic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Nishimura, Mitsugu published the artcileEfficient GC/MS analysis of hydroxy lipid compounds from geochemical samples using tertiary-butyldimethylsilyl etherification, Application In Synthesis of 13099-34-8, the main research area is hydroxy lipid compound analysis geochem sample GC MS; butyldimethylsilyl etherification hydroxy lipid compound analysis GC MS.

To improve GC/MS anal. of hydroxy compounds from various sources, such as alkanols, sterols, diols, keto-ols and hydroxy fatty acids (FAs) with complex compositions, the authors evaluated their column-chromatog. separation after silylation. N-tertiary-butyldimethylsilylimidazole (t-BDMS) was expected to be the most effective silylating reagent to make -OH groups more inert and hence to promote separation according to the chem. and structural differences in their individual alkyl groups. The t-BDMS etherification of hydroxy compounds remarkably improved their purification and separation by strongly constraining or enhancing the chromatog. different behavior possibly caused by chem. and structural differences in the alkyl groups. Thus, the complex mixtures of hydroxy compounds from lacustrine and marine sediments were clearly fractionated into each major compound group, i.e., alkanols, sterols, diols, hydroxy FAs and keto-ols. Also, the individual sterols, diols and hydroxy FAs were separated into four, two and five specific sub-groups, resp. It is worth noting that, by using only one column, this anal. improvement was achieved with excellent reproducibility. Such fine fractionations resulted in a substantial decrease in the complexity of the gas chromatograms of all major hydroxy compounds The improvement enabled the authors to simply and accurately identify and quantify major as well as trace homologs and isomers of various hydroxy compounds with a high level of sensitivity using GC/MS. Consequently, the authors found some series of hitherto unknown compounds to serve as information sources for organisms and environments. The chromatog. fractionation following t-BDMS etherification of lipids from various geochem. samples provides not only a greater understanding of their mol. distributions and stable carbon isotopic ratios, but also substantially upgrades lipid anal. efficiency as a whole.

Organic Geochemistry published new progress about Etherification. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, Application In Synthesis of 13099-34-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhu, Quan-Fei published the artcileIn-Depth Annotation Strategy of Saturated Hydroxy Fatty Acids Based on Their Chromatographic Retention Behaviors and MS Fragmentation Patterns, Application of 17-Hydroxyheptadecanoic acid, the main research area is hydroxy fatty acid annotation LC MS.

Hydroxy fatty acids are a class of bioactive compounds in a variety of organisms. The identification of hydroxy fatty acids in biol. samples has still been a challenge because of their low abundance, high structural similarity, and limited availability of authentic hydroxy fatty acid standards Here, we present a strategy for the annotation of saturated monohydroxyl fatty acids (OH-FAs) based on the integration of chromatog. retention rules and MS2 fragmentation patterns. Thirty-nine authentic OH-FA standards were used to investigate their retention behavior on a reversed-phase stationary phase (C18) of liquid chromatog., and we found that their retention simultaneously follows two kinds of “”carbon number rules””. Using the “”carbon number rules””, the retention index (RI) of all OH-FAs that contain carbon numbers from 8 to 18 (C8-18) can be predicted. Addnl., by studying the MS2 fragmentation of OH-FAs under collision-induced dissociation, we found that the intensity ratio (IR) of the characteristic fragment ions ([M + H]+-63 and [M + H]+-45) is closely related to the position of the hydroxyl group on the OH-FA structure, which is helpful to further identify and confirm the OH-FA isomers. As a result, 97 of 107 potential OH-FAs detected in honey, human serum, and rice seedling by chem. isotope labeling-assisted liquid chromatog.-mass spectrometry were annotated upon the RI matching and IR confirming. Furthermore, in order to simplify the annotation process of OH-FAs, we constructed an OH-FA library to facilitate the annotation of OH-FAs. Overall, this study provides a new and promising tool for the in-depth annotation of OH-FA isomers.

Analytical Chemistry (Washington, DC, United States) published new progress about Blood analysis. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, Application of 17-Hydroxyheptadecanoic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Roggatz, Christina C. published the artcileModelling Antifouling compounds of Macroalgal Holobionts in Current and Future pH Conditions, Recommanded Product: 17-Hydroxyheptadecanoic acid, the main research area is pH ocean acidification antifouling compound Rhodophyta Chlorophyta; Macroalgae; and macro-colonizers; antifouling; chemical communication; climate change; micro; ocean acidification.

Marine macroalgae are important ecosystem engineers in marine coastal habitats. Macroalgae can be neg. impacted through excessive colonization by harmful bacteria, fungi, microalgae, and macro-colonisers and thus employ a range of chem. compounds to minimize such colonization. Recent research suggests that environmental pH conditions potentially impact the functionality of such chem. compounds Here we predict if and how naturally fluctuating pH conditions and future conditions caused by ocean acidification will affect macroalgal (antifouling) compounds and thereby potentially alter the chem. defense mediated by these compounds We defined the relevant ecol. pH range, analyzed and scored the pH-sensitivity of compounds with antifouling functions based on their modelled chem. properties before assessing their distribution across the phylogenetic macroalgal groups, and the proportion of sensitive compounds for each investigated function. For some key compounds, we also predicted in detail how the associated ecol. function may develop across the pH range. The majority of compounds were unaffected by pH, but compounds containing phenolic and amine groups were found to be particularly sensitive to pH. Future pH changes due to predicted average open ocean acidification pH were found to have little effect. Compounds from Rhodophyta were mainly pH-stable. However, key algal species amongst Phaeophyceae and Chlorophyta were found to rely on highly pH-sensitive compounds for their chem. defense against harmful bacteria, microalgae, fungi, and biofouling by macro-organisms. All quorum sensing disruptive compounds were found the be unaffected by pH, but the other ecol. functions were all conveyed in part by pH-sensitive compounds For some ecol. keystone species, all of their compounds mediating defense functions were found to be pH-sensitive based on our calculations, which may not only affect the health and fitness of the host alga resulting in host breakdown but also alter the associated ecol. interactions of the macroalgal holobiont with micro and macrocolonisers, eventually causing ecosystem restructuring and the functions (e.g. habitat provision) provided by macroalgal hosts. Our study investigates a question of fundamental importance because environments with fluctuating or changing pH are common and apply not only to coastal marine habitats and estuaries but also to freshwater environments or terrestrial systems that are subject to acid rain. Hence, while warranting exptl. validation, this investigation with macroalgae as model organisms can serve as a basis for future investigations in other aquatic or even terrestrial systems.

Journal of Chemical Ecology published new progress about Acid rain. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, Recommanded Product: 17-Hydroxyheptadecanoic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Spielvogel, Sandra published the artcileDistribution of cutin and suberin biomarkers under forest trees with different root systems, Formula: C17H34O3, the main research area is Fagus Picea Quercus Pseudotsuga root cutin suberin biomarker.

Differences in chem. composition of root compounds and root systems among tree species may affect organic matter (OM) distribution, source and composition in forest soils. The objective of this study was to elucidate the contribution of species specific cutin and suberin biomarkers as proxies for shoot- and root-derived organic carbon (OC) to soil OM at different depths with increasing distance to the stems of four different tree species. The contribution of cutin- and suberin-derived lipids to OM in a Cutanic Alisol was analyzed with increasing soil depth and distance to the stems of Fagus sylvatica L., Picea abies (L.) Karst., Quercus robur L. and Pseudotsuga menziesii (Mirb.) Franco. Cutin and suberin monomers of plants and soils were analyzed by alk. hydrolysis and subsequent gas chromatog.-mass spectrometry. The amount and distribution of suberin-derived lipids in soil clearly reflected the specific root system of the different tree species. The amount of cutin-derived lipids decreased strongly with soil depth, indicating that the input of leaf/needle material is restricted to the topsoil. In contrast to the suberin-derived lipids, the spatial pattern of cutin monomer contribution to soil OM did not depend on tree species. Our results document the importance of tree species as a main factor controlling the composition and distribution of OM in forest soils. They reveal the impact of tree species on root-derived OM distribution and the necessity to distinguish among different zones when studying soil OM storage in forests.

Plant and Soil published new progress about Biomarkers. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, Formula: C17H34O3.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Argentini, M. published the artcileComparison of several methods for the synthesis of ω-iodine-123-heptadecanoic acid, Recommanded Product: 17-Hydroxyheptadecanoic acid, the main research area is iodoheptadecanoic acid iodine labeled; exchange iodine heptadecanoic acid.

Four different methods for the synthesis of ω-123I-heptadecanoic acid were presented: labeling of 17-bromoheptadecanoic acid with Na123I in solution or melt, reaction of Na123I with the tosylate of 17-hydroxyheptadecanoic acid, and phase-transfer catalyzed exchange of 17-iodoheptadecanoic acid with Na123I or H123I. The tosylate and phase transfer catalyst methods were superior to the former 2 methods.

Journal of Radioanalytical Chemistry published new progress about iodoheptadecanoic acid iodine labeled; exchange iodine heptadecanoic acid. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, Recommanded Product: 17-Hydroxyheptadecanoic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Goni, Miguel A. published the artcileCutin-derived cupric oxide reaction products from purified cuticles and tree leaves, HPLC of Formula: 13099-34-8, the main research area is cutin copper oxide oxidation fatty acid; cuticle leaf oxidation fatty acid.

Long-chain (C16-C18) hydroxy fatty acids are obtained among the nonlignin-derived reaction products from the CuO oxidation of a variety of geochem. samples. To investigate the origin of these acids, the CuO reaction products of isolated cuticles and whole leaves were investigated. The reaction products from the CuO oxidation of purified apple (Malus pumila) cuticle include 16-hydroxyhexadecanoic acid, 10,16-dihydroxyhexadecanoic acid, 9,10,18-trihydroxyoctadec-12-enoic acid, and 9,10,18-trihydroxyoctadecanoic acid as major components. The distribution of these cutin-derived CuO reaction products is similar to the monomer compositions deduced from traditional methods of cutin anal. Oxidation of whole English Holly (Ilex aquifolium) leaves yields cutin-derived acidic reaction products (in addition to lignin-derived phenols) similar to those obtained from oxidation of the corresponding isolated cuticles, indicating that CuO oxidation of bulk plant tissue is a viable procedure of cutin anal. in geochem. applications.

Geochimica et Cosmochimica Acta published new progress about Apple. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, HPLC of Formula: 13099-34-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Roggatz, Christina C. published the artcileModelling Antifouling compounds of Macroalgal Holobionts in Current and Future pH Conditions, Recommanded Product: 17-Hydroxyheptadecanoic acid, the main research area is pH ocean acidification antifouling compound Rhodophyta Chlorophyta; Macroalgae; and macro-colonizers; antifouling; chemical communication; climate change; micro; ocean acidification.

Marine macroalgae are important ecosystem engineers in marine coastal habitats. Macroalgae can be neg. impacted through excessive colonization by harmful bacteria, fungi, microalgae, and macro-colonisers and thus employ a range of chem. compounds to minimize such colonization. Recent research suggests that environmental pH conditions potentially impact the functionality of such chem. compounds Here we predict if and how naturally fluctuating pH conditions and future conditions caused by ocean acidification will affect macroalgal (antifouling) compounds and thereby potentially alter the chem. defense mediated by these compounds We defined the relevant ecol. pH range, analyzed and scored the pH-sensitivity of compounds with antifouling functions based on their modelled chem. properties before assessing their distribution across the phylogenetic macroalgal groups, and the proportion of sensitive compounds for each investigated function. For some key compounds, we also predicted in detail how the associated ecol. function may develop across the pH range. The majority of compounds were unaffected by pH, but compounds containing phenolic and amine groups were found to be particularly sensitive to pH. Future pH changes due to predicted average open ocean acidification pH were found to have little effect. Compounds from Rhodophyta were mainly pH-stable. However, key algal species amongst Phaeophyceae and Chlorophyta were found to rely on highly pH-sensitive compounds for their chem. defense against harmful bacteria, microalgae, fungi, and biofouling by macro-organisms. All quorum sensing disruptive compounds were found the be unaffected by pH, but the other ecol. functions were all conveyed in part by pH-sensitive compounds For some ecol. keystone species, all of their compounds mediating defense functions were found to be pH-sensitive based on our calculations, which may not only affect the health and fitness of the host alga resulting in host breakdown but also alter the associated ecol. interactions of the macroalgal holobiont with micro and macrocolonisers, eventually causing ecosystem restructuring and the functions (e.g. habitat provision) provided by macroalgal hosts. Our study investigates a question of fundamental importance because environments with fluctuating or changing pH are common and apply not only to coastal marine habitats and estuaries but also to freshwater environments or terrestrial systems that are subject to acid rain. Hence, while warranting exptl. validation, this investigation with macroalgae as model organisms can serve as a basis for future investigations in other aquatic or even terrestrial systems.

Journal of Chemical Ecology published new progress about Acid rain. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, Recommanded Product: 17-Hydroxyheptadecanoic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Spielvogel, Sandra published the artcileDistribution of cutin and suberin biomarkers under forest trees with different root systems, Formula: C17H34O3, the main research area is Fagus Picea Quercus Pseudotsuga root cutin suberin biomarker.

Differences in chem. composition of root compounds and root systems among tree species may affect organic matter (OM) distribution, source and composition in forest soils. The objective of this study was to elucidate the contribution of species specific cutin and suberin biomarkers as proxies for shoot- and root-derived organic carbon (OC) to soil OM at different depths with increasing distance to the stems of four different tree species. The contribution of cutin- and suberin-derived lipids to OM in a Cutanic Alisol was analyzed with increasing soil depth and distance to the stems of Fagus sylvatica L., Picea abies (L.) Karst., Quercus robur L. and Pseudotsuga menziesii (Mirb.) Franco. Cutin and suberin monomers of plants and soils were analyzed by alk. hydrolysis and subsequent gas chromatog.-mass spectrometry. The amount and distribution of suberin-derived lipids in soil clearly reflected the specific root system of the different tree species. The amount of cutin-derived lipids decreased strongly with soil depth, indicating that the input of leaf/needle material is restricted to the topsoil. In contrast to the suberin-derived lipids, the spatial pattern of cutin monomer contribution to soil OM did not depend on tree species. Our results document the importance of tree species as a main factor controlling the composition and distribution of OM in forest soils. They reveal the impact of tree species on root-derived OM distribution and the necessity to distinguish among different zones when studying soil OM storage in forests.

Plant and Soil published new progress about Biomarkers. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, Formula: C17H34O3.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sweet, Charles R. published the artcileEndotoxin structures in the psychrophiles Psychromonas marina and Psychrobacter cryohalolentis contain distinctive acyl features, HPLC of Formula: 13099-34-8, the main research area is Psychromonas Psychrobacter lipid A endotoxin.

Lipid A is the essential component of endotoxin (Gram-neg. lipopolysaccharide), a potent immunostimulatory compound As the outer surface of the outer membrane, the details of lipid A structure are crucial not only to bacterial pathogenesis but also to membrane integrity. This work characterizes the structure of lipid A in two psychrophiles, Psychromonas marina and Psychrobacter cryohalolentis, and also two mesophiles to which they are related using MALDI-TOF MS and fatty acid Me ester (FAME) GC-MS. P. marina lipid A is strikingly similar to that of Escherichia coli in organization and total acyl size, but incorporates an unusual doubly unsaturated tetradecadienoyl acyl residue. P. cryohalolentis also shows structural organization similar to a closely related mesophile, Acinetobacter baumannii, however it has generally shorter acyl constituents and shows many acyl variants differing by single methylene (-CH2-) units, a characteristic it shares with the one previously reported psychrotolerant lipid A structure. This work is the first detailed structural characterization of lipid A from an obligate psychrophile and the second from a psychrotolerant species. It reveals distinctive structural features of psychrophilic lipid A in comparison to that of related mesophiles which suggest constitutive adaptations to maintain outer membrane fluidity in cold environments.

Marine Drugs published new progress about Cytotoxicity. 13099-34-8 belongs to class alcohols-buliding-blocks, name is 17-Hydroxyheptadecanoic acid, and the molecular formula is C17H34O3, HPLC of Formula: 13099-34-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts