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Hydrocarbons, Acyclic
Pediatric Emergency Care (26)3 2010
Abstract
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Journal of Physical Chemistry B (112)11 2008
Abstract
The tertiary structure of the TC5b miniprotein is stabilized by inter-residue interactions of the Trp-cage, which is composed of a Tyr and several Pro residues surrounding a central Trp residue. The interactions include Ar-Ar (aromatic side-chain-aromatic side-chain), Ar-NH (aromatic side-chain-back...
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PMID: 18303883
PDF is available here.
PDF is available here.
Abstract
The partial molar volume changes in the transfer of several hydrophobic molecules, which are composed of aromatic rings and an aliphatic chain of different lengths, from carbon tetrachloride to water (DeltaV(hyd)) are calculated using the three-dimensional interaction site model theory of molecular...
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PMID: 18247964
PDF is available here.
PDF is available here.
Abstract
MP2(FULL)/6-311++G** calculations are performed on the cation-pi complexes of Li+ and Mg2+ with the pi-face of linear (ethylene, butadiene, hexatriene, and octatetraene) and cyclic (benzene, naphthalene, anthracene, phenanthrene and naphthacene) unsaturated hydrocarbons. The interaction energy is fo...
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PMID: 18183319
PDF is available here.
PDF is available here.
Abstract
Temporal and spatial variations in the composition of particulate organic matter (POM) from Florida Bay, USA were examined. The predominance of short-chain homologues for n-alkanes, n-alcohols and n-fatty acids as well as relatively high abundance of C(27) and C(28) sterols suggested that an autocht...
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PMID: 17889327
PDF is available here.
PDF is available here.
Marine Pollution Bulletin (54)11 2007
Abstract
Surface seawater samples were collected in the Irish Sea and Liverpool Bay area from the R.V. Prince Madog during the period of 25-31 of March 2006. VOCs were purged with nitrogen, pre-concentrated on a SPME fibre and analysed immediately on a GC-MS. Target compounds quantified were halogenated (0.2...
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PMID: 17889034
PDF is available here.
PDF is available here.
Chemical Senses (32)7 2007
Abstract
We have applied a quantitative structure-activity relationship (QSAR) approach to analyze the chemical parameters that determine the relative sensitivity of olfaction and nasal chemesthesis to a common set of volatile organic compounds (VOCs). We used previously reported data on odor detection thres...
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PMID: 17573355
PDF is available here.
PDF is available here.
Abstract
Vicia faba was grown in crude oil polluted soil and its roots were extracted for the detection and estimation of hydrocarbons. Saturated and unsaturated Aliphatic Hydrocarbons (AHs) ranging from C(22) to C(36) were identified in AHs fraction. However, PAHs were not present in the same extract. This...
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PMID: 17180412
PDF is available here.
PDF is available here.
Chemosphere (68)11 2007
Abstract
The temporal variability and bioaccumulation dynamics of C(12-25)n-alkanes, isoprenoids and unresolved aliphatic hydrocarbons (UCM) were studied in a detritivorous fish (Sábalo: Prochilodus lineatus) collected from 1999 to 2005 in the sewage impacted Buenos Aires coastal area. Fish muscles contain...
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PMID: 17363033
PDF is available here.
PDF is available here.
Journal of Biotechnology (130)4 2007
Abstract
A new approach to prepare an acyclic permutant of kalata B1, a cysteine-rich plant cyclopeptide with uterotonic activity, is described. The synthetic codon-optimized cDNA sequence encoding this 29-residue peptide was cloned and fused in-frame to the His(6)-tagged thioredoxin gene in the bacterial ex...
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PMID: 17610979
PDF is available here.
PDF is available here.
Abstract
A new method of determining the composition of sediment/soil gases and their volatile organic compound (VOC) content is described. VOCs were collected in situ from intertidal sediments in the Menai Strait and surrounding areas. The sampling was performed using a portable sampler comprising a funnel...
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PMID: 17492085
PDF is available here.
PDF is available here.
Abstract
Ethanol steam reforming is a promising reaction for producing fuel cell hydrogen. Depending on catalyst and reaction conditions, mixtures of condensable hydrocarbons and organic and inorganic gases are produced. This paper proposes an economic and effective solution for separating and detecting thes...
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PMID: 17462130
PDF is available here.
PDF is available here.
Abstract
In the studies performed in normal mice, the NHS-DOTA ligand yielded the highest (177)Lu/(125)I uptake ratios in tissues indicative of loss of label from the chelate; for this reason, only 1B4M and MeO-DOTA were evaluated further. The (177)Lu/(125)I ratio in bone increased gradually with time for th...
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PMID: 17307125
PDF is available here.
PDF is available here.
Abstract
Free nitriles NCCH2R (1a R = CO2Me, 1b R = SO2Ph, and 1c R = COPh) with an acidic alpha-methylene react with acyclic nitrones -O+N(Me)=C(H)R' (2a R' = 4-MeC6H4 and 2b R' = 2,4,6-Me3C6H2), in refluxing CH2Cl2, to afford stereoselectively the E-olefins (NC)(R)C=C(H)R' (3a-3c and 3a'-3c'), whereas, whe...
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PMID: 17253790
PDF is available here.
PDF is available here.
Abstract
Since early work in the 1980s, the bile acids have become well established as building blocks for supramolecular chemistry. The author's laboratory has specialised in converting cholic acid, the archetypal bile acid, into macrocyclic and acyclic receptors for anions and carbohydrates. This review hi...
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PMID: 17962729
PDF is available here.
PDF is available here.
Abstract
Plankton samples (20-350 microm and >350 microm) collected at three transects along the Galician coast (NW Spain) were analysed for individual aliphatic and aromatic hydrocarbons by GC-MS. Sample collection was performed in April-July 2003, after the Prestige oil spill (November 2002), to determine...
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PMID: 16899290
PDF is available here.
PDF is available here.
Marine Pollution Bulletin (52)10 2006
Abstract
In November 2002, the sinking of the Prestige oil tanker off the Galician coast (N.W. Spain) caused the largest ecological catastrophe in the history of Spain, affecting the coast called the 'Costa da Morte' (Galicia, N.W. Spain). This work is focused on the study of the oil contamination of the int...
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PMID: 16650444
PDF is available here.
PDF is available here.
Abstract
MP2/6-31++G** and B3LYP/6-31++G** ab initio molecular orbital calculations have been performed in order to obtain molecular geometries, binding energies and vibrational properties of the C2H2-HF, C2H(CH3)-HF and C2(CH3)2-HF H-bonded complexes. As expected, the more pronounced effects on the structur...
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PMID: 16427352
PDF is available here.
PDF is available here.
Marine Pollution Bulletin (50)12 2005
Abstract
The composition and spatial distribution of aliphatic and polycyclic aromatic hydrocarbons (PAHs) were investigated in biota and coastal sediments from four countries surrounding the Gulf (Bahrain, Qatar, United Arab Emirates and Oman). The levels of total petroleum hydrocarbons (TPH), aliphatic unr...
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PMID: 16038948
PDF is available here.
PDF is available here.
Phytochemistry (66)19 2005
Abstract
From the lipophilic extract of the brown alga Bifurcaria bifurcata collected off the Atlantic coast of Southern Brittany (Quiberon, France), five polar linear diterpenoids have been isolated. These metabolites have been identified as hydroxylated derivatives of 13-oxo- and 13-hydroxygeranylgeraniol....
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PMID: 16038952
PDF is available here.
PDF is available here.
Abstract
The susceptibility of typical class D beta-lactamases to inhibition by acyl phosph(on)ates has been determined. To a large degree, these class D enzymes behaved very similarly to the class A TEM beta-lactamase towards these reagents. Dibenzoyl phosphate stood out in both cases as a lead compound tow...
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PMID: 16189136
PDF is available here.
PDF is available here.
Abstract
A general strategy is proposed to assign aliphatic side-chain resonances of large 13C,15N-labeled proteins without deuteration, using 4D 13C,15N-edited NOESY and MQ-(H)CCH-TOCSY experiments on the basis of prior assignments of backbone and 13Cbeta resonances. The strategy has been tested on a 214 re...
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PMID: 16117513
PDF is available here.
PDF is available here.
Chemical Senses (30)6 2005
Abstract
We compared the effect of single alkenes with that of single alkanes; the effect of mixtures of alkenes versus that of mixtures of alkanes and the whole alkane fraction separated from the cuticular lipids versus the alkene fraction. With only one exception (the comparison between n-C(19) and (Z)9-C(...
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PMID: 15917370
PDF is available here.
PDF is available here.
Abstract
The Cassini Ultraviolet Imaging Spectrometer (UVIS) observed the extinction of photons from two stars by the atmosphere of Titan during the Titan flyby. Six species were identified and measured: methane, acetylene, ethylene, ethane, diacetylene, and hydrogen cyanide. The observations cover altitudes...
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PMID: 15890872
PDF is available here.
PDF is available here.
Science of the Total Environment (337)1-3 2005
Abstract
Total atmospheric deposition, i.e., both wet and dry deposition, was sampled during 11 months in the "Ile-de-France" region, France. Monthly fluxes of aliphatic hydrocarbons (AHs), polycyclic aromatic hydrocarbons (PAHs) and heavy metals (HMs) were studied at three representative sites (two urbanise...
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PMID: 15626393
PDF is available here.
PDF is available here.
Abstract
Surficial sediment samples collected from Kaohsiung Harbour and its nearby coast were analyzed for aliphatic hydrocarbons and parent polycyclic aromatic hydrocarbons (PAHs). According to our results, the average total concentrations of n-alkanes (n-C12 to C35) and aromatics (15 PAHs) were 4.33 micro...
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PMID: 15727309
PDF is available here.
PDF is available here.
Abstract
An efficient protocol for the amination of 6-chloropurine derivatives through nucleophilic aromatic substitution under microwave irradiation was developed and applied to the synthesis in two steps of a series of new acyclic nucleosides (acyclovir analogues) starting from commercially available compo...
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PMID: 18007322
PDF is available here.
PDF is available here.
Abstract
A series of novel acyclic nucleoside analogues containing bis-(hydroxymethyl)phosphinic acid (BHPA) or tris(hydroxymethyl)phosphine oxide (THPO) coupled with DNA nucleobases or with 5-fluorouracil were prepared and their antiviral activity was studied against cytomegalovirus (CMV), varicella-zoster...
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PMID: 15646645
PDF is available here.
PDF is available here.
Abstract
Landfills are the third largest source of anthropogenic CH4 in the United States, and there is potential for reduction in this source of greenhouse gases and other contaminants. The objective of this work was to contrast emissions of CH4 and non-methane organic compounds (NMOCs) from landfill cells...
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PMID: 15487801
PDF is available here.
PDF is available here.
Chemosphere (56)3 2004
Abstract
Modelling of soot and SOF emissions from a typical European turbocharged diesel engine has been made. The model consists of a detailed kinetic mechanism with 472 reactions (120 chemical species) and data from the thermodynamic diagnostic procedure of the combustion process of the engine. The forward...
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PMID: 15172594
PDF is available here.
PDF is available here.
Biochemistry (Washington) (43)22 2004
Abstract
Beta-lactam antibiotics are vital weapons in the treatment of bacterial infections, but their future is under increasing threat from beta-lactamases. These bacterial enzymes hydrolyze and inactivate beta-lactam antibiotics, rendering the host cell resistant to the bactericidal effects of the drugs....
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PMID: 15170342
PDF is available here.
PDF is available here.
Journal of Organic Chemistry (69)11 2004
Abstract
Our efforts over the past 10 years in the design and diversity-oriented synthesis of low molecular weight acyclic and heterocyclic combinatorial libraries derived from amino acids, peptides, and/or peptidomimetics are described. Employing a "toolbox" of various chemical transformations, including al...
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PMID: 15152987
PDF is available here.
PDF is available here.
Chemosphere (55)7 2004
Abstract
This study represents a forensic chemical analysis to define the liability for the coastal bitumens polluting the beaches of the Mediterranean city of Alexandria. Six tar balls collected from several locations along the coast of the city were analyzed for their acyclic and polycyclic hydrocarbons as...
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PMID: 15051374
PDF is available here.
PDF is available here.
Abstract
Five ebselen and three acyclic ebselen derivatives were synthesized. These compounds were screened for their glutathione peroxidase (GSH Px)-like activity and scavenging activity against 1,1-diphenyl-2-pycryl-hydrazyl (DPPH) and peroxynitrite radical. All tested compounds displayed similar significa...
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PMID: 14646319
PDF is available here.
PDF is available here.
Abstract
Ten bacterial strains were isolated by enrichment culture, using as carbon sources either aliphatics or an aromatic-polar mixture. Oxygen uptake rate was used as a criterion to determine culture transfer timing at each enrichment stage. Biodegradation of aliphatics (10,000 mg L(-1)) and an aromatic-...
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PMID: 15162200
PDF is available here.
PDF is available here.
Abstract
The results of a study of ion-molecule reactions occurring in pure methane, acetylene, ethylene, ethane, propyne, propene, propane, and diacetylene at pressures up to 40 microns of pressure are reported. A variety of experimental methods are used: The standard double resonance in an ICR, for determi...
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PMID: 12892914
PDF is available here.
PDF is available here.
Abstract
A novel molecular descriptor called MaP (mapping property distributions of molecular surfaces) is presented. It combines facile computation, translational and rotational invariance, and straightforward interpretability of the computed models. A three-step procedure is used to compute the MaP descrip...
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PMID: 12672239
PDF is available here.
PDF is available here.
Abstract
The pi complexes first formed as essential intermediates from alkenes, alkynes, and allenes with bromine have been investigated in different solvents by UV-spectroscopy in combination with stopped-flow techniques allowing the determination of the equilibrium constants, K(f). Using alkenes with steri...
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PMID: 12596140
PDF is available here.
PDF is available here.
Abstract
I left arrow over right arrow EI left arrow over right arrow EI', where EI is a reversibly formed noncovalent complex, and EI' is a covalent complex. Reactions of the cyclic phosphates with the P99 beta-lactamase were effectively irreversible, while that of the 4-phenyl cyclic phosphate with the TEM...
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PMID: 12578365
PDF is available here.
PDF is available here.
Abstract
Abstract
The hydrocarbon composition of atmospheric particulate matter from A Coruña city (Northwest Spain) has been studied. TSP (total suspended particulate) and PM10 (particulate matter with aerodynamic diameter < 10 microm) samples were taken over 7 and 4 months at two stations located in residential an...
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PMID: 12729041
PDF is available here.
PDF is available here.
Abstract
Novel synthetic approach to mono-O-protected anti-conformationally constrained pyrimidine acyclic nucleoside was attained from the coupling of lithiated 2,4-dimethoxy-6-methylpyrimidine with 1-benzyloxy-3-(tert-butyldiphenylsilyloxy)propan-2-one, followed by the sequential reactions of methylthiomet...
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PMID: 12192131
PDF is available here.
PDF is available here.
Drug Discovery Today (7)1 2002
Abstract
The level of sophistication of combinatorial synthesis continues to increase at a heady pace. Fairly complex target molecules are now being assembled combinatorially using a broad palette of organic reactions both in solution- and solid-phase. This review highlights academic and industrial examples...
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PMID: 11790603
PDF is available here.
PDF is available here.
Abstract
As previously described (Pratt, R. F.; Hammar, N. J. J. Am. Chem. Soc. 1998, 120, 3004.), 1-hydroxy-4,5-benzo-2,6-dioxaphosphorinone(3)-1-oxide (salicyloyl cyclic phosphate) inactivates the class C beta-lactamase of Enterobacter cloacae P99 in a covalent fashion. The inactivated enzyme slowly revert...
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PMID: 11673973
PDF is available here.
PDF is available here.
Abstract
Abstract
A series of novel, unusual type of acyclic phosphonate-based nucleotide analogues related to well-known antivirals (PMEA and HPMPA) was synthesized using easily available synthon. These compounds, which are distinguished for the presence of phosphonomethyl acetal linkage, form a group of derivatives...
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PMID: 11554542
PDF is available here.
PDF is available here.
Journal of Organic Chemistry (66)11 2001
Abstract
Abstract
Novel trimethyl-branched alkanes which eluted with the monomethylalkanes were identified in the internal lipids of Helicoverpa zea but were not present in Heliothis virescens. Their structures were unique in that the first methyl branch occurred on carbon 2 and the 2nd and 3rd methyl branch points w...
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PMID: 11290446
PDF is available here.
PDF is available here.
Abstract
Abstract
Hydrocarbons were extracted from the surface of the cuticle and from the hemolymph of adult female gypsy moths. GC and GC/MS analysis indicated that the cuticular hydrocarbons with chain lengths >21 carbons were the same as those found in the hemolymph. These consisted of mostly saturated straight c...
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PMID: 10685098
PDF is available here.
PDF is available here.
La Revue du praticien (50)4 2000
Abstract
Poisonings with industrial products represent approximately 7% of the cases reported to the poison centres. Ingestion of petroleum distillates induces irritation of the gastrointestinal tract, central nervous system depression and aspiration pneumonitis which may be severe; treatment is mainly suppo...
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PMID: 10748668
PDF is available here.
PDF is available here.
Organic Geochemistry (30)12 1999
Abstract
All-cis hentriaconta-9,15,22-triene (I) has been isolated from Chloroflexus mats, Yellowstone National Park (USA), and identified by GC-(HR)MS analysis of I and its hydrogenated and DMDS-derivatized products and by 1H and 13C NMR spectroscopy.
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PMID: 11543197
PDF is available here.
PDF is available here.
Food and Chemical Toxicology (35)10-11 1997
Abstract
We have developed quantitative structure-toxicity relationship (QSTR) models for assessing dermal sensitization using guinea pig maximization test (GPMT) results. The models are derived from 315 carefully evaluated chemicals. There are two models, one for aromatics (excluding one-benzene-ring compou...
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PMID: 9463544
PDF is available here.
PDF is available here.