Category: 104-76-7

Zhu, Fengxiao; Zhu, Changyin; Zhou, Dongmei; Gao, Juan published the artcile< Fate of di (2-ethylhexyl) phthalate and its impact on soil bacterial community under aerobic and anaerobic conditions>, Safety of 2-Ethylhexan-1-ol, the main research area is di 2ethylhexylphthalate Clostridiales Bacillus Actinobacteria Proteobacteria Gemmatimonadaceae soil pollution; Bacterial community; High-throughput sequencing; Metabolite; Oxygen; Phthalate ester.

In this study, we examined the influence of oxygen on the degradation of di (2-ethylhexyl) phthalate (DEHP), the accumulation of its monoester metabolite mono (2-ethylhexyl) phthalate (MEHP) and their impact on soil bacterial communities. Soil microcosms artificially contaminated with DEHP (0, 100 and 1000 mg kg-1) were incubated under aerobic and anaerobic flooded conditions, and sacrificed after 0, 21 and 42 days. The results indicated that DEHP degradation proceeded at similar rates in aerobic and anaerobic flooded soils, but accumulation of metabolite MEHP was more likely to occur in anaerobic soils. Moreover, MEHP generated from DEHP degradation seemed to be readily released into the water phase, which may arouse health concerns. Illumina Miseq sequencing showed that MEHP had a greater impact on soil bacterial community than DEHP at the same dosage, and a wide range of bacterial phylotypes were inhibited by MEHP under anaerobic conditions. High DEHP contamination (1000 mg kg-1) significantly reduced bacterial diversity and altered bacterial community structure under anaerobic conditions, but not under aerobic conditions. Firmicutes was constantly inhibited by DEHP under both aerobic (Bacillus) and anaerobic (unclassified Clostridiales Family_XVIII) conditions. On the other hand, bacterial phylotypes belonging to Actinobacteria, β-Proteobacteria and Gemmatimonadaceae were constantly enriched by DEHP in anaerobic soils, however no such a clear pattern existed in aerobic soils. This work greatly expanded our understanding of the fate of DEHP and its modifying effect on bacterial communities under different environmental conditions.

Chemosphere published new progress about Actinobacteria. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Safety of 2-Ethylhexan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Jantunen, Niklas; Virolainen, Sami; Latostenmaa, Petri; Salminen, Justin; Haapalainen, Mika; Sainio, Tuomo published the artcile< Removal and recovery of arsenic from concentrated sulfuric acid by solvent extraction>, Name: 2-Ethylhexan-1-ol, the main research area is arsenic sulfuric acid tributyl phosphate phase equilibrium solvent extraction.

Arsenic-contaminated sulfuric acid solutions are produced in large quantities as byproduct during pyrometallurgical processing of sulfide minerals. Options for re-using such acid solutions are increased if the arsenic is removed and recovered as a product. The performances of tri-Bu phosphate and a mixture of 6 wt-% 1,2-octanediol in 2-ethylhexanol were studied in liquid-liquid extraction of arsenic from an industrial solution containing 10.4 M H2SO4. It was found that, due to the complex phase equilibrium, a process design based on conventional batch equilibrium data did not describe the countercurrent processes accurately. A countercurrent flowsheet utilizing undiluted tri-Bu phosphate was investigated by pseudo-countercurrent extractions 83.7% extraction of arsenic and 31.4% coextn. of H2SO4 was obtained in three-stage countercurrent extraction operated at a solvent-to-feed ratio of 0.79. Two-stage countercurrent scrubbing with pure water at O/A = 4.03 back-extracted 83.6% of H2SO4 and 24.9% of arsenic. 100% and 89.7% back-extraction was achieved in four-stage stripping at O/A = 2.01 for H2SO4 and arsenic, resp. The effects of varying the flowsheet and operating parameters on separation efficiency are discussed.

Hydrometallurgy published new progress about Phase equilibrium Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), PROC (Process). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Name: 2-Ethylhexan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Prathima, A.; Karthikeyan, S.; Radhi Devi, K.; Usha, K.; Shanthi, M. published the artcile< Environmental effect of lubricity additives through dielectric molecular parameters>, Synthetic Route of 104-76-7, the main research area is caprylic valeric acid additive lubricity.

Lubricant additives are chems., nearly always-organic or organometallic, that are added to oils in quantities of a few weight percent to improve the lubricating capacity and durability of the oil. Specific purposes of lubricant additives are improving the wear and friction characteristics by provision for adsorption and extreme pressure lubrication, improving the oxidation resistance, control of corrosion, control of contamination by reaction products, wear a and other debris, reducing excessive decrease of lubricant viscosity at high temperatures, enhancing lubricant characteristics by reducing the pour point and inhibiting the generation of foam. These properties depend upon the mol. interactions between the chem. additives. So that, this study target on investigating the mol. interactions through the dielec. parameters such as Kirkwood correlation factor, Excess permittivity, Bruggemann factor and Dipolar excess free energy in the lubricative binary mixtures,(1) caprylic acid + 2-ethyl-1-hexanol and (2) valeric acid + 2-ethyl-1-hexanol. The above dielec. parameters have been calculated from the exptl. measured values of capacitance and refractive index of mixtures, at temperatures 303 K, 313 K and 323 K. In the above studied systems, existence of short and long range, homo and hetero interactions are identified. The hetero interaction results in the formation linear as well as closed multimers in the mixture Due to the existing interactions, structural changes are found to take place.

Materials Today: Proceedings published new progress about Helmholtz free energy. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Synthetic Route of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Xiu, Fu-Rong; Wang, Yixiao; Yu, Xuan; Li, Yifan; Lu, Yongwei; Zhou, Ke; He, Jiahuan; Song, Zhiqi; Gao, Xiang published the artcile< Novel safety treatment strategy of DEHP-rich flexible polyvinyl chloride waste through low-temperature critical aqueous ammonia treatment>, Application In Synthesis of 104-76-7, the main research area is easte flexible polyvinyl chloride critical aqueous ammonia plasticizer dechlorination; Dechlorination; Low-temperature critical aqueous ammonia; Plasticizer recovery; Waste flexible polyvinyl chloride.

Flexible polyvinyl chloride (f-PVC) contains high content of plasticizers and chlorine. Improper treatment of waste f-PVC can easily lead to resource wasting and bring environmental risks. In this work, a novel strategy for resource recycling and dechlorination of waste f-PVC containing high content of di-(2-ethylhexyl) phthalate (DEHP) was developed by using low-temperature critical aqueous ammonia (LCA) process. The LCA treatment of waste DEHP-rich f-PVC (WDP) was performed at the temperature range of 200-400°C with the ammonia concentration of 1%-5%. The results indicated that the LCA temperature had a significant effect on the chem. composition of decomposition products. High concentration of 2-ethyl-1-hexanol (86.12%), which is an important chem. feedstock and is derived from the decomposition of DEHP, could be obtained from WDP by the LCA process at 250°C, and the concentration of 2-ethyl-1-hexanol decreased markedly with increasing the temperature Benzaldehyde and acetophenone were generated when the temperature increased to 300°C, and their concentrations increased with the rise of temperature The increase of the ammonia concentration and the temperature could enhance the dechlorination efficiency of WDP. The dechlorination could reach 98.7% at 300°C. This result showed that the LCA process was a promising and high-efficiency strategy for the sustainable management of WDP.

Science of the Total Environment published new progress about Dechlorination. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Application In Synthesis of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Aisala, Heikki; Sola, Juha; Hopia, Anu; Linderborg, Kaisa M.; Sandell, Mari published the artcile< Odor-contributing volatile compounds of wild edible Nordic mushrooms analyzed with HS-SPME-GC-MS and HS-SPME-GC-O/FID>, Related Products of 104-76-7, the main research area is mushroom volatile compound; Aromagram; Gas chromatography–olfactometry; Mushrooms; Odor; SPME.

Although Nordic wild edible mushrooms offer a wide range of different odors their scientific examination has been scarce. The aim of this study was to characterize the aroma compounds of four Finnish wild mushroom species with trained assessors using gas chromatog.-olfactometry as well as gas chromatog.-mass spectrometry. Headspace volatiles were extracted from sous vide cooked mushroom samples (Boletus edulis, Lactarius camphoratus, Cantharellus cibarius and Craterellus tubaeformis) using solid-phase microextraction Odor-contributing compounds were measured with two columns of differing polarity using the detection frequency method. Compounds were identified based on reference compounds, linear retention indexes, odor descriptions, and mass spectrometry. Both the volatile compound profiles and the aromagrams were distinct with characteristic compounds for each species. The results demonstrate that especially saturated and unsaturated aldehydes and ketones contribute to the odor of the studied wild mushrooms. This thorough comparison also indicates compounds linked to the sensory properties of mushrooms.

Food Chemistry published new progress about Hydrocarbons Role: ANT (Analyte), PRP (Properties), ANST (Analytical Study). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Related Products of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Jing; Bian, Xiaoqiang; Rapp, Graeme; Lang, James; Montoya, Alejandro; Trethowan, Richard; Bouyssiere, Brice; Portha, Jean-Francois; Jaubert, Jean-Noel; Pratt, Peter; Coniglio, Lucie published the artcile< From ethyl biodiesel to biolubricants: Options for an Indian mustard integrated biorefinery toward a green and circular economy>, Category: alcohols-buliding-blocks, the main research area is Brassica ethyl biodiesel biolubricant biorefinery.

This work aims to analyze whether Indian mustard can be harnessed within a biorefinery system to generate energy carriers and high value-added products. Within this objective, two options of harnessing Indian mustard seed oil (IMSO) were investigated, the first for the production of Et biodiesel (IMSOEEs) and the second for the production of a biolubricant (IMSO2E1HEs) by transesterification of the unpurified IMSOEEs with 2-ethyl-1-hexanol (2E1H). Furthermore, low cost and environmentally-friendly conversion processes were targeted. The biofuel was obtained under mild conditions of ethanolysis (35°C, atm. pressure, ethanol to oil molar ratio of 8, 1.1 wt% KOH, and 50 min) carried out in two-stages separated by addition of recycled glycerol, and followed by dry-purification with Indian mustard stems-based adsorbent. In order to enhance biolubricant yield, reactive distillation with optimized operating pressure was selected (0.05 bar, 70°C, 2 wt% KOH, 2E1H to IMSOEEs molar ratio of 2, 65 min), followed by bubble-washing (assisted with citric acid) and then vacuum distillation (inferior to 0.01 bar). The produced IMSOEEs met the basic biodiesel properties with a satisfactory ester content (95.8 wt%). Similarly, a high conversion of IMOEEs (93 wt%) was reached for the biolubricant, leading to an IMSO2E1HE product that exhibited satisfactory properties, and thus has the potential to act as a biolubricant. Nevertheless, these results could be improved with a pre-treatment of the departure IMSO to remove species that are not glycerides, such as glucosinolates. Thereby, ensuring that the produced Et biodiesel conforms strictly to industry specifications.

Industrial Crops and Products published new progress about Biodiesel fuel. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ferreira, Aurelia R. O.; Silvestre-Albero, Joaquin; Maier, Martin E.; Ricardo, Nagila M. P. S.; Cavalcante, Celio L. Jr.; Luna, F. Murilo T. published the artcile< Sulfonated activated carbons as potential catalysts for biolubricant synthesis>, HPLC of Formula: 104-76-7, the main research area is sulfonated activated carbon potential catalyst biolubricant synthesis.

In this study, sulfonated activated carbons have been prepared, under different conditions, with the purpose of evaluating the effect of the nature and amount of sulfonic surface groups on the esterification reaction of free fatty acids (FFA) with different long-chain alcs. The synthesized catalysts were characterized using different techniques and 1H NMR was used for monitoring the reaction products. The modifications of the surface functionalities were assessed by XPS and Thermogravimetric anal. (TGA), while changes in the porous network and morphol. of the samples were evaluated before and after the treatment of the original activated carbon sample. XPS results showed the presence of two types of sulfur, one from thiophenic sulfur (present on all materials, including the unmodified sample), and the other from sulfonic groups (SO3H), at 168 eV (present only in the modified samples). These catalysts were applied in the esterification reaction and presented excellent catalytic performances, while the original activated carbon exhibited conversions similar to reactions without any catalyst. On the other hand, the conversion of fatty acids when using the modified carbons improves significantly with values up to ∼100% to mono alcs. and 70% to trimethylolpropane.

Molecular Catalysis published new progress about Esterification. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, HPLC of Formula: 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Hui; Ramnani, Pankaj; Pham, Tung; Villarreal, Claudia Chaves; Yu, Xuejun; Liu, Gang; Mulchandani, Ashok published the artcile< Gas biosensor arrays based on single-stranded DNA-functionalized single-walled carbon nanotubes for the detection of volatile organic compound biomarkers released by huanglongbing disease-infected citrus trees>, Computed Properties of 104-76-7, the main research area is single stranded DNA SWCNT VOC biomarker huanglongbing disease; FET; HLB; SWNT; gas sensor; ssDNA; volatile organic compounds.

Volatile organic compounds (VOCs) released by plants are closely associated with plant metabolism and can serve as biomarkers for disease diagnosis. Huanglongbing (HLB), also known as citrus greening or yellow shoot disease, is a lethal threat to the multi-billion-dollar citrus industry. Early detection of HLB is vital for removal of susceptible citrus trees and containment of the disease. Gas sensors are applied to monitor the air quality or toxic gases owing to their low-cost fabrication, smooth operation, and possible miniaturization. Here, we report on the development, characterization, and application of elec. biosensor arrays based on single-walled carbon nanotubes (SWNTs) decorated with single-stranded DNA (ssDNA) for the detection of four VOCs-ethylhexanol, linalool, tetradecene, and phenylacetaldehyde-that serve as secondary biomarkers for detection of infected citrus trees during the asymptomatic stage. SWNTs were noncovalently functionalized with ssDNA using π-π interaction between the nucleotide and sidewall of SWNTs. The resulting ssDNA-SWNT hybrid structure and device properties were investigated using Raman spectroscopy, UV spectroscopy, and elec. measurements. To monitor changes in the four VOCs, gas biosensor arrays consisting of bare SWNTs before and after being decorated with different ssDNA were employed to determine the different concentrations of the four VOCs. The data was processed using principal component anal. (PCA) and neural net fitting (NNF).

Sensors published new progress about Biomarkers. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Computed Properties of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pawlus, Sebastian; Grzybowski, Andrzej; Kolodziej, Slawomir; Wikarek, Michal; Dzida, Marzena; Goralski, Pawel; Bair, Scott; Paluch, Marian published the artcile< Density Scaling Based Detection of Thermodynamic Regions of Complex Intermolecular Interactions Characterizing Supramolecular Structures>, Quality Control of 104-76-7, the main research area is methyl pentanol intermol interaction supramol structure density scaling thermodn.

Abstract: In this paper, applying the d. scaling idea to an associated liquid 4-methyl-2-pentanol used as an example, we identify different pressure-volume-temperature ranges within which mol. dynamics is dominated by either complex H-bonded networks most probably leading to supramol. structures or non-specific intermol. interactions like van der Waals forces. In this way, we show that the d. scaling law for mol. dynamics near the glass transition provides a sensitive tool to detect thermodn. regions characterized by intermol. interactions of different type and complexity for a given material in the wide pressure-volume-temperature domain even if its typical form with constant scaling exponent is not obeyed. Moreover, we quantify the observed decoupling between dielec. and mech. relaxations of the material in the d. scaling regime. The suggested methods of analyses and their interpretations open new prospects for formulating models based on proper effective intermol. potentials describing physicochem. phenomena near the glass transition.

Scientific Reports published new progress about Dielectric loss Role: PRP (Properties). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Quality Control of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhuang, Jinda; Xiao, Qing; Feng, Tao; Huang, Qingrong; Ho, Chi-Tang; Song, Shiqing published the artcile< Comparative flavor profile analysis of four different varieties of Boletus mushrooms by instrumental and sensory techniques>, Safety of 2-Ethylhexan-1-ol, the main research area is Boletus flavor sensory evaluation; Aroma-active compounds; Boletus; Gas chromatography–olfactometry; Odor activity value; Partial least squares regression; Solvent assisted flavor evaporation.

Mushrooms from different varieties and manufacturing methods show different flavor profiles. In order to understand the sensory attributes and aroma compounds of boletus, the discrepancy of aroma profile in four varieties of boletus was determined using gas chromatog.-olfactometry combined with sensory anal. and partial least squares regression anal. (PLSR). Sensory anal. revealed that Boletus Edulis had potent roasted and buttery attributes, Boletus Aereu exhibited woody note and Boletus Auripes Pk presented powerful floral and smoky aromas, while Boletus Rubellus Krombh showed weakness in five sensory attributes. The quant. anal. revealed that the dominant volatiles in boletus samples were esters, aldehydes, acids, alcs., pyrazines, ketones and phenols. A total of 42 potent aroma compounds (OAVs > 1) were determined by aroma extract dilution anal. and quant. anal. 1-Octen-3-ol and 2,5-dimethylpyrazine were the potent aroma compounds among four boletus samples. In addition, the key aroma compounds were 3-(methylthio)propionaldehyde and 2,6-dimethylpyrazine in Boletus edulis. Isovaleric acid, 2,6-dimethylpyrazine, benzeneacetaldehyde and (E)-2-octenal were the key aroma compounds in Boletus aereu. In Boletus auripes Pk, isovaleric acid, 3-ethylphenol and 2,6-dimethylpyrazine were the key aroma compounds, while 3-methylvaleric acid, isovaleric acid and 2,3-dimethylpyrazine significantly contributed to the aroma of boletus rubellus Krombh.

Food Research International published new progress about Acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Safety of 2-Ethylhexan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts