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Showing 1-27 of 27 results for "90656" within Papers
Geir Kildahl-Andersen et al.
Magnetic resonance in chemistry : MRC, 48(12), 951-954 (2010-10-01)
The full (1)H and (13)C NMR chemical shift assignment of 2α-methyl-17α(H),21β(H)-hopane is presented. This compound is formed in mature sediments from biogenic sources of 2β-methyl-17β(H),21β(H)-hopanoids, which include several cyanobacteria. In addition, full (1)H and (13)C NMR chemical shift data of
Masahiko Isaka et al.
Mycological research, 113(Pt 4), 491-497 (2009-05-08)
The scale insect pathogens Hypocrella s. lat. and their Aschersonia anamorphs, collected at various locations in Thailand, were surveyed for their productivity of three hopane triterpenes, zeorin (6alpha,22-dihydroxyhopane), dustanin (15alpha,22-dihydroxyhopane), and 3beta-acetoxy-15alpha,22-dihydroxyhopane, when cultured in a liquid medium (potato-dextrose broth)
Chintalapati Venkata Ramana et al.
Antonie van Leeuwenhoek, 103(4), 885-898 (2013-01-12)
Strain JC90(T) was isolated from a soda lake in Lonar, India. Strain JC90(T) maintains its external pH to 8.5 and participates in halite formation. Based on 16S rRNA gene sequence similarity studies, strain JC90(T) was found to belong to the
Ralph J Delfino et al.
Environmental health perspectives, 118(6), 756-762 (2010-02-04)
Evidence is needed regarding the air pollutant components and their sources responsible for associations between particle mass concentrations and human cardiovascular outcomes. We previously found associations between circulating biomarkers of inflammation and mass concentrations of quasi-ultrafine particles <or= 0.25 microm
P V Welander et al.
Geobiology, 10(2), 163-177 (2012-01-10)
Hopanes preserved in both modern and ancient sediments are recognized as the molecular fossils of bacteriohopanepolyols, pentacyclic hopanoid lipids. Based on the phylogenetic distribution of hopanoid production by extant bacteria, hopanes have been used as indicators of specific bacterial groups
Ute Kraus et al.
Inhalation toxicology, 23(7), 431-447 (2011-06-07)
The aerosol components responsible for the adverse health effects of the exposure to particulate matter (PM) have not been conclusively identified, and there is especially little information on the role of particulate organic compounds (POC). This study evaluated the role
Vikas Jaitak et al.
Natural product communications, 5(10), 1561-1566 (2010-12-03)
Phytochemical investigation of the aerial parts of Potentilla fulgens L. led to the isolation of two new triterpenes, potentene A (1) and potentene B (2). In addition, three known compounds afzelchin-4alpha --> 8"-catechin (3), epiafzelchin (4) and rutin (5) were
Julio Sepúlveda et al.
Science (New York, N.Y.), 326(5949), 129-132 (2009-10-03)
The course of the biotic recovery after the impact-related disruption of photosynthesis and mass extinction event at the Cretaceous-Paleogene boundary has been intensely debated. The resurgence of marine primary production in the aftermath remains poorly constrained because of the paucity
Andrew T Lambe et al.
Environmental science & technology, 43(23), 8794-8800 (2009-12-01)
Hydroxyl radical (OH) uptake by organic aerosols, followed by heterogeneous oxidation, happens nearly at the collision frequency. Oxidation complicates the use of organic molecular markers such as hopanes for source apportionment, since receptor models assume markers are stable during transport.
Masahiko Isaka et al.
Journal of natural products, 74(10), 2143-2150 (2011-10-15)
Seven new lanostane-type triterpenes, hypocrellols A-G (1-7), and six new hopane-type triterpenes, 7β,15α-dihydroxy-22(29)-hopene (8), 3β,7β-dihydroxy-22(29)-hopene (9), 3β-acetoxy-15α-hydroxy-22(29)-hopene (10), 3β,7β,15α,22-tetrahydroxyhopane (11), 3β-acetoxy-7β,15α,22-trihydroxyhopane (12), and 7β,15α,22-trihydroxyhopane (13), were isolated from the scale insect pathogenic fungus Hypocrella sp. BCC 14524. The structures of
Martin Blumenberg et al.
FEMS microbiology letters, 293(1), 73-78 (2009-02-19)
Hopanoids are important lipid components of many bacterial groups and are therefore ubiquitous in soils, sediments, and rocks. Until recently, it was believed that the synthesis of hopanoids is restricted to at least microaerophilic bacteria and consequently geological findings of
Li-guo Guo et al.
Huan jing ke xue= Huanjing kexue, 31(8), 1897-1903 (2010-11-26)
Biodegradabilities of several hydrocarbon biomarker groups, including isoprene, hopanes and steranes in a medium-crude oil BZ34-1 and a heavy-crude oil SZ36-1 from offshore, were determined under laboratory conditions. The results of GC-MS analysis showed that isoprene biomarkers such as pristane
Y Subhash et al.
International journal of systematic and evolutionary microbiology, 64(Pt 12), 4129-4133 (2014-09-23)
Strain JC245(T) was isolated from a sand sample, and appeared as dark pink colonies on agar plates with cells staining Gram-negative. Catalase and oxidase activities were positive. Casein was hydrolysed while chitin, gelatin and starch were not. Major (>5 %) fatty
J P Sáenz et al.
Geobiology, 10(4), 311-319 (2012-02-15)
Cyanobacteria are key players in the global carbon and nitrogen cycles and are thought to have been responsible for the initial rise of atmospheric oxygen during the Neoarchean. There is evidence that a class of membrane lipids known as hopanoids
Fang Wang et al.
Journal of Asian natural products research, 12(1), 94-97 (2010-04-15)
Phytochemical investigation of the whole plant of Dicranostigma leptopodum (Maxim) Fedde led to the isolation of a new hopane triterpene, dicranostigmone (1), and a known compound, erythrodiol-3-O-palmitate (2). The structure of the new compound (1) was elucidated by various spectroscopic
Bo Gao et al.
Environmental science and pollution research international, 20(4), 2398-2409 (2012-08-29)
From 28 November to 23 December 2009, 24-h PM2.5 samples were collected simultaneously at six sites in Guangzhou. Concentrations of 18 polycyclic aromatic hydrocarbons (PAHs) together with certain molecular tracers for vehicular emissions (i.e., hopanes and elemental carbon), coal combustion
Paula V Welander et al.
Proceedings of the National Academy of Sciences of the United States of America, 107(19), 8537-8542 (2010-04-28)
The rise of atmospheric oxygen has driven environmental change and biological evolution throughout much of Earth's history and was enabled by the evolution of oxygenic photosynthesis in the cyanobacteria. Dating this metabolic innovation using inorganic proxies from sedimentary rocks has
H G M Edwards et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 78(1), 191-195 (2010-11-06)
The aim of this work is to investigate the viability and potential of three groups of organic compounds as biomarkers in a future robotic analytical exploration of Mars. The three compounds have been identified as suitable candidates for potential biomarkers
D M Doughty et al.
Geobiology, 7(5), 524-532 (2009-10-09)
2-Methylhopanes, molecular fossils of 2-methylbacteriohopanepolyol (2-MeBHP) lipids, have been proposed as biomarkers for cyanobacteria, and by extension, oxygenic photosynthesis. However, the robustness of this interpretation is unclear, as 2-methylhopanoids occur in organisms besides cyanobacteria and their physiological functions are unknown.
Masahiko Isaka et al.
Fungal biology, 115(4-5), 401-405 (2011-05-03)
The insect pathogens in the genus Torrubiella s. lat. were recently divided into new genera based on molecular phylogenetic characters. Isolates collected at various locations in Thailand, were tested for their productivity of a hopane-type triterpene, zeorin (6α,22-dihydroxyhopane), when cultured
Jemal Demma et al.
Phytotherapy research : PTR, 27(4), 507-514 (2012-06-01)
An extract of Glinus lotoides, a medicinal plant used in Africa and Asia for various therapeutic purposes, was recently shown to cause DNA damage in vitro. To further explore the potential genotoxicity of this plant, fractionation of the crude extract
Emily A Weitkamp et al.
Environmental science & technology, 42(21), 7950-7956 (2008-11-27)
Triterpanoid hopanes and steranes are petroleum biomarkers used to apportion fine particulate matter to motor vehicle emissions. To investigate the chemical stability of these compounds, aerosolized motor oil was exposed to the hydroxyl radical (OH) in a smog chamber and
Masahiko Isaka et al.
Journal of natural products, 74(4), 782-789 (2011-04-09)
A new cyclohexadepsipeptide, conoideocrellide A (1), its linear derivatives, conoideocrellides B-D (2-4), three new hopane triterpenoids (5-7), two new bioxanthracenes (9 and 10), and a new isocoumarin glycoside (13) were isolated from the scale insect pathogenic fungus Conoideocrella tenuis BCC
Y Subhash et al.
International journal of systematic and evolutionary microbiology, 64(Pt 7), 2238-2243 (2014-04-09)
Strain JC216(T) was isolated from a contaminated Petri dish. Colonies were of pale yellow colour and cells were Gram-stain-negative, oxidase-positive and catalase-positive. Chitin, starch and gelatin were not hydrolysed. Strain JC216(T) contained C18 : 1ω7c/C18 : 1ω6c, C16 : 1ω7c/C16
S Siljeström et al.
Geobiology, 8(1), 37-44 (2009-11-17)
Steranes and hopanes are organic biomarkers used as indicators for the first appearance of eukaryotes and cyanobacteria on Earth. Oil-bearing fluid inclusions may provide a contamination-free source of Precambrian biomarkers, as the oil has been secluded from the environment since
Gargi Kulkarni et al.
Journal of bacteriology, 195(11), 2490-2498 (2013-03-26)
Lipid molecules preserved in sedimentary rocks facilitate the reconstruction of events that have shaped the evolution of the Earth's biosphere. A key limitation for the interpretation of many of these molecular fossils is that their biological roles are still poorly
Y Subhash et al.
International journal of systematic and evolutionary microbiology, 63(Pt 6), 2338-2343 (2012-11-28)
Strain JC141(T) was isolated from an alkaline soil (pH 8.8) at Mau, Uttar Pradesh, India. Colonies were blue with a metallic sheen; cells stained Gram-negative, and were oxidase- and catalase-positive, but chitinase-negative. Major fatty acids were C16:1ω7c/C16:1ω6c, C16:0 and C18:0
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