Tag: M.W=150-200

Patel, Dhananjay I. published the artcileEvaluation of new, sputtered carbon solid-phase microextraction fibers with multi-functional group test mixture, Category: esters-buliding-blocks, the main research area is sputtered carbon solid phase microextraction fiber multifunctional test mixture.

We report the first fabrication of sputtered carbon, solid-phase microextraction (SPME) fibers. These fibers have competitive extraction capabilities compared with the com. carbon wide range (CWR) SPME fiber. This report also includes a demonstration of a newly developed SPME test mix that includes 15 different compounds with a wide range of functional groups and chem. properties. The fiber fabrication process involves sputtering carbon onto fused silica fibers, and the effects of throw distance on the morphol. of the carbon coatings were studied. Four different carbon coating thicknesses were evaluated, with PDMS added as a stationary phase. These fibers were characterized with multiple anal. techniques, including SEM (SEM), XPS, water contact angle (WCA) goniometry, as well as headspace (HS) and direct immersion (DI)-SPME-GC-MS. The best (11.5 μm) sputtered carbon SPME fibers, with and without PDMS, were evaluated using the new evaluation mix and compared with the com. CWR fiber and a previously sputtered/developed silicon fiber. The new probe mix helped elucidate differences among the fibers, which would have been missed by current com. test mixes. The sputtered carbon SPME fibers showed similar functional group selectivity as com. CWR fibers. However, the sputtered carbon fibers showed higher responses per volume compared with the com. CWR fiber, indicating the porous morphol. of the sputtered carbon has the ability to overcome large phase thickness/volume discrepancies and increase the relative recovery for various compounds

Separations published new progress about Binding energy. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Al Farraj, Dunia A. published the artcilePolynuclear aromatic anthracene biodegradation by psychrophilic Sphingomonas sp., cultivated with tween-80, Quality Control of 140-11-4, the main research area is polynuclear aromatic anthracene Sphingomonas tween 80 biodegradation; Anthracene; Optimization; PAHs; Sphingomonas; Tween-80.

Anthracene is a low mol. weight polynuclear aromatic hydrocarbons (PAHs) being identified as a precedence toxic contaminant in the ecosystem. Thus, the present work was designed to evaluate anthracene biodegradation efficiency by selected marine bacteria. From the marine isolates, the most effective anthracene biodegrading strain was identified as Sphingomonas sp., KSU05. Time course batch growth results indicated that the isolate KSU05 was capable of surviving up to 500 mg/L of anthracene. The influence of various nutrient sources were screened for enhanced growth and pyrene degradation, based on results glucose and tween-80 were used for further optimization studies. Batch exptl. anal. showed maximum biodegradation (70.5%) of anthracene (50 mg/L) with enhanced survival of Sphingomonas sp. KSU05 was observed at 96 h of cultivation. Box-Behnken design optimization results showed that the culture conditions enhanced the anthracene biodegradation (90.0%) at pH 7.0, 0.3 mM of tween-80 concentration, and 5.5% of glucose concentration In addition, the isolate Sphingomonas sp. KSU05 was found to rapidly degrade anthracene within 96 h. The anthracene intermediates was analyzed using Gas chromatog. mass spectrophotometer (GC-MS). Overall, this research shown that the Sphingomonas sp., cultivated with suggested optimum conditions could provide an effective prospective for the degradation of anthracene from contaminated environment.

Chemosphere published new progress about Biodegradation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Quality Control of 140-11-4.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

O’Reilly, Kirk T. published the artcileOxygen-Containing Compounds Identified in Groundwater from Fuel Release Sites Using GCxGC-TOF-MS, SDS of cas: 111-11-5, the main research area is oxygen containing compound groundwater fuel release wastewater treatment.

This research continues a 7-yr study of oxygen-containing organic compounds present in groundwater at gasoline and diesel fuel release sites that are quantified as diesel-range “”total petroleum hydrocarbons”” when measured by methods utilizing solvent extraction and gas chromatog. Two-dimensional gas chromatog. with time-of-flight mass spectrometry was used to tentatively identify 1162 compounds (TICs) in 113 groundwater samples from 22 sites. Samples were collected from wells either upgradient of the release, within the source zone, or downgradient of the source but still within the plume of dissolved organics associated with release. The names and formulas of all TICs found in samples from each well type are presented and the results from upgradient and downgradient locations are compared in detail. About 60% of the most frequently detected TICs in downgradient wells were also detected in upgradient wells. A majority of these were saturated straight chain alkyl acids, commonly called fatty acids, or fatty acid esters. Of TICs frequently detected in downgradient wells but not upgradient wells, over half were branched alkyl alcs. Hierarchical cluster anal. results suggest about 80% of the chem. composition of downgradient samples is more similar to upgradient samples than to source area samples. Results suggest some TICs may not be petroleum degradation intermediates but compounds synthesized by microorganisms through secondary production and carbon cycling.

Groundwater Monitoring & Remediation published new progress about Biodegradation. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, SDS of cas: 111-11-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Mohler, Rachel E. published the artcileTowards comprehensive analysis of oxygen containing organic compounds in groundwater at a crude oil spill site using GC×GC-TOFMS and Orbitrap ESI-MS, Computed Properties of 110-42-9, the main research area is organic compound groundwater crude oil spill comprehensive analysis; Bemidji; Biodegradation; GC×GC-TOFMS; High resolution mass spectrometry; Metabolites; Orbitrap ESI-MS.

In this study, both GC × GC-TOFMS and Orbitrap ESI-MS were used to characterize the oxygen containing organic compounds, OCOCs, present in groundwater at a site where a crude oil pipeline ruptured decades ago. This is the only side-by-side comparison of results from these two methods analyzed by the same laboratory GC × GC-TOFMS anal. shows OCOCs identified at the crude oil-release site are consistent with, and structurally similar to, those identified at previously studied fuel release sites. Mol. structures close to the release point differ from those found downgradient, becoming less complex and with different compound classes dominating. As with the GC × GC-TOFMS, the Orbitrap revealed that the composition of OCOCs present in groundwater close to the source area was distinctly different from that seen downgradient; however, the chem. structures increased significantly in size and complexity from wells near the source to the farthest downgradient well. Investigation into this finding suggests that the presence and structures of these non-GC-able OCOCs are consistent with organic matter resulting from biosynthesis or other processes found in natural water systems and are unlikely to be intermediates (metabolites) along petroleum biodegradation pathways.

Chemosphere published new progress about Biodegradation. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Computed Properties of 110-42-9.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rosli, Siti-Suhailah published the artcileModeling to enhance attached microalgal biomass growth onto fluidized beds packed in nutrients-rich wastewater whilst simultaneously biofixing CO2 into lipid for biodiesel production, Application In Synthesis of 111-11-5, the main research area is Chlorella microalgal biomass carbon dioxide biofixation biodiesel fluidized bioreactor.

One way to reconcile an issue associating with the harvesting of microalgal biomass is via the application of attached growth cultivation mode, whereby the mature microalgal biomass can be facilely harvested from the support material. Accordingly, the objectives of present works were to model the attached growth of Chlorella vulgaris onto polyurethane foam support material in a fluidized bed bioreactor while simultaneously bioremediating real nutrients-rich wastewater and biofixing CO2 for biodiesel production The math. models accounting the impact of various interactions between light intensities and CO2 concentrations in culture medium on growing attached microalgal biomass were initially improved. The successful practicality of models was confirmed from the anal. of statistical accuracy while predicting the growth of attached microalgal biomass in real nutrients-rich wastewater. When the microalgal growth reached the stationary growth phase, all the nutrients (nitrogen and phosphorous sources of compounds) were completed impoverished, accentuating the bioremediation potentiality in satisfying the effluent discharged requirements. Subsequently, the modeling of microalgal CO2 biofixation also unveiled that the highest CO2 biofixation rate was transpiring in parallel with the growth rate of attached microalgal biomass during the exponential growth phase. Upon the harvesting, the neutral lipid from mature attached microalgal biomass was found to contain 97.7% (by weight of lipid) of fatty acid Me esters (FAMEs) mixture, heralding the biodiesel purity. Assessment of biodiesel quality showed a balance composition among the saturated, monounsaturated and polyunsaturated FAMEs mixture with high in C16 and C18 FAME species for the materialization of efficient combustion.

Energy Conversion and Management published new progress about Biodiesel fuel. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application In Synthesis of 111-11-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Iglesias, A. published the artcileEssential oils from Humulus lupulus as novel control agents against Varroa destructor, HPLC of Formula: 110-42-9, the main research area is Humulus lupulus essential oil Varroa destructor control agent.

Humulus lupulus, commonly known as hops has widely been used in breweries globally, however, the acaricidal properties of H. lupulus derived products could also be a novel and interesting avenue of study against insect pests. We tested the antiparasitic activity of H. lupulus essential oils against the honeybee mite Varroa destructor, and its bioactivity against the honeybee Apis mellifera. The hop varieties used in this study were Cascade, Victoria, Spalt, and Mapuche. The essential oils were extracted from flowers by hydrodistillation and then characterized by CG-MS. We evaluated the toxicity of hop essential oils against mites, adult bees (A. mellifera) and larvae, and whether the oils were an attractant or repellent to mites. The major components of the oils for all varieties were β-myrcene, myrcene, beta-farnesene, alpha, and beta caryophyllene. Bioassays revealed that essential oils from all the varieties were toxic to the V. destructor mite. Victoria essential oil was the most toxic to V. destructor. The oils did not act as a repellent or attractant to the mites, and the bee (A. mellifera) mortality associated with complete exposure to the essential oil application was moderate to low. The results presented here provide promising results for the application of essential oils from hops grown in South America as an alternative method for controlling the honeybee mite Varroa destructor.

Industrial Crops and Products published new progress about Apis mellifera. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, HPLC of Formula: 110-42-9.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Al Mawali, Mawiya Jaifar Talib published the artcileComparative phytochemical investigations and in vitro pharmacological activities of different brands of olive oil, Recommanded Product: Methyl octanoate, the main research area is olive oil phytochem pharmacol antioxidant.

Olive oil is composed of primary triacylglycerol about 99% of the whole components and secondary fatty acids which are mono, diacylglycerols and phosphates. Olive oil is known to contain many active constituents with different pharmacol. actions such as antioxidant action. The purpose of this research is thus, to compare phytochem. components of different olive oil brands as well as to determine their cytotoxic and antioxidant properties. All those four brands of extra virgin olive oil contained all necessary active constituents especially oleic acid, palmitic acid and linoleic acid. Due to the presence of healthy constituents, all four brands of olive oil showed equivalent antioxidant activity. No cytotoxic activity was reported on the evaluated concentrations Overall comparison of phytochems. as well as pharmacol. activities of all four brands of extra virgin olive oil was found to be satisfactory.

Journal of Applied Sciences published new progress about Artemia salina. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Recommanded Product: Methyl octanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sazawa, Kazuto published the artcileEvaluation of carbon mineralization and structural alterations of organic carbon in high-moor peat soils during incubation, Formula: C11H22O2, the main research area is organic carbon moor peat soil mineralization incubation.

The quantity and quality of soil organic matter (SOM) in the wetlands and peatlands are important for evaluating of the effects of environmental changes. This study’s aim was to evaluate the change in the chem. properties of SOM and dissolved organic matter (DOM) during a constant temperature incubation of high-moor peat soil under two types of vegetation. Incubation of high-moor peat soils collected from marsh vegetation and dwarf bamboo was conducted for 108 days at each temperature of 25°C and 35°C. The chem. properties of alk. extract and DOM in soil samples during incubation were analyzed by tetramethylammonium hydroxide thermochemolysis-gas chromatog.-mass spectrometry (TMAH-GC/MS) and fluorescence anal. The cumulative CO2 emission from peat under dwarf bamboo was higher than that of peat under marsh vegetation. During incubation at 35°C, plant and microbial residues in DOM extracted from dwarf bamboo soil were increased significantly at the early stages of culture. On the other hand, the components of DOM in the marsh vegetation soil sample did not significantly change between incubation at each temperature The fluorescence spectra showed that protein-like fluorescent DOM contained in dwarf bamboo soil is consumed by microorganisms, which promotes leaching of humic-like fluorescent DOM and carbon mineralization during the incubation period at a higher temperature Compared with marsh vegetation soil, the DOM in dwarf bamboo soil is susceptible to temperature rises and can be a larger source of CO2 emissions. This study shows that evaluation of DOM properties in soil could be useful to assess the effect of climate change on soil environment.

Journal of Soils and Sediments published new progress about Bamboo (dwarf). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Formula: C11H22O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sazawa, Kazuto published the artcileEvaluation of carbon mineralization and structural alterations of organic carbon in high-moor peat soils during incubation, Computed Properties of 111-11-5, the main research area is organic carbon moor peat soil mineralization incubation.

The quantity and quality of soil organic matter (SOM) in the wetlands and peatlands are important for evaluating of the effects of environmental changes. This study’s aim was to evaluate the change in the chem. properties of SOM and dissolved organic matter (DOM) during a constant temperature incubation of high-moor peat soil under two types of vegetation. Incubation of high-moor peat soils collected from marsh vegetation and dwarf bamboo was conducted for 108 days at each temperature of 25°C and 35°C. The chem. properties of alk. extract and DOM in soil samples during incubation were analyzed by tetramethylammonium hydroxide thermochemolysis-gas chromatog.-mass spectrometry (TMAH-GC/MS) and fluorescence anal. The cumulative CO2 emission from peat under dwarf bamboo was higher than that of peat under marsh vegetation. During incubation at 35°C, plant and microbial residues in DOM extracted from dwarf bamboo soil were increased significantly at the early stages of culture. On the other hand, the components of DOM in the marsh vegetation soil sample did not significantly change between incubation at each temperature The fluorescence spectra showed that protein-like fluorescent DOM contained in dwarf bamboo soil is consumed by microorganisms, which promotes leaching of humic-like fluorescent DOM and carbon mineralization during the incubation period at a higher temperature Compared with marsh vegetation soil, the DOM in dwarf bamboo soil is susceptible to temperature rises and can be a larger source of CO2 emissions. This study shows that evaluation of DOM properties in soil could be useful to assess the effect of climate change on soil environment.

Journal of Soils and Sediments published new progress about Bamboo (dwarf). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Computed Properties of 111-11-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Leite, Victor S. A. published the artcileUntargeted Metabolomics Reveals Metabolic Changes Linked to Bulb Purpling in Garlic (Allium sativum L.), Application of Methyl octanoate, the main research area is Allium bulb purpling metabolomics metabolism.

Garlic (Allium sativum L.) is a vegetable known worldwide, mainly for its characteristic aroma and flavor and for exhibiting several medicinal properties. This culture has significant economic and social relevance in the world agricultural scenario. Most of the garlic production is sold in fresh bulbs, where for some countries the more purple skin bulbs are more valued in the market. However, there is still no consensus about the factors that intensify the purple color of the garlic bulbs. Here, we employed gas chromatog.-mass spectrometry-based untargeted metabolomics to study the metabolome of dark and light purple garlics. Multivariate statistical anal. revealed distinct metabolite signatures between these garlic groups. As metabolic changes play an important factor in changes in the phenotype of cells or an organism, this report presents a fundamental approach for supporting garlic producers in understanding the factors that intensify the purplish color of garlic bulbs, paving the way for safer garlic production with dark purple bulbs. In addition, the medicinal properties of dark purple garlic were greater than that of the light purple garlic, presenting greater abundance in organosulfur compounds Overall, the data suggest that some organic acid and fatty acids such as malonic acid and docosanoic acid are the key differentiating factors between dark and light purple garlics.

ACS Food Science & Technology published new progress about Allium sativum. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application of Methyl octanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics