Tag: M.W=100-150

Lin, Yu-Len published the artcileCharacterization of bio-oils from fast pyrolysis of thorny bamboo (Bambusa stenostachya) and long-branch bamboo (B. dolichoclada), Category: tetrahydrofurans, the publication is Taiwan Linye Kexue (2013), 28(4), 203-216, database is CAplus.

In this study, thorny bamboo (Bambusa stenostachya) and long-branch (B. dolichoclada) bamboo were integrated as feedstock to produce pyrolysis liquid (bio-oil) using fast pyrolysis technol., and the basic properties of the bio-oils were analyzed. Results showed that the higher heating value (HHV) of both bio-oils were 13.92 MJ/kg for thorny bamboo and 14.87 MJ/kg for long-branch bamboo, and both HHVs were relatively low for use as bioenergy. The bio-oils need to be reprocessed using upgrading technologies to promote the efficiency of energy utilization. However, both bio-oils were analyzed by gas chromatog. mass spectrometry (GC-MS) and were shown to contain more than 80 different organic compounds with multifunctional groups. The major compounds in the bio-oil of long-branch bamboo were phenols with the largest proportion of >50%, and those of thorny bamboo included good distributions of phenols, carboxylic acids, and ketones. Both bio-oils are great potential resources beyond just a fossil fuel to provide various chem. compounds

Taiwan Linye Kexue published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Category: tetrahydrofurans.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Groenewold, Gary S. published the artcileSignatures of Biologically Driven Hemicellulose Modification Quantified by Analytical Pyrolysis Coupled with Multidimensional Gas Chromatography Mass Spectrometry, Safety of 3-Hydroxydihydrofuran-2(3H)-one, the publication is ACS Sustainable Chemistry & Engineering (2020), 8(4), 1989-1997, database is CAplus.

Biomass storage conditions are a major source of feedstock quality variability that impact downstream preprocessing, feeding, handling and conversion into biofuels, chems. and products. Microbial activity in the stored biomass can result in heating that can modify or degrade the cell walls of the biomass, changing its characteristics. Anal. pyrolysis has been used to characterize biomass, but at temperatures typically used (∼600°C), differentiation of samples having different storage histories is subtle or non-existent. In this study, lower-temperature (400°C) pyrolysis was used to show large differences in corn stover samples that had experienced different biol. heating histories, indicated by pyrolysis products that were identified, and in several cases quantified using two-dimensional gas chromatog. / mass spectrometry. Pyrolysis of the samples originating from biomass that had experienced biol. heating during storage generated small oxygenates such as furfural, 5-Me furfural and 2-(5H)-furanone with efficiencies that were as much as ten times greater than those measured for samples that were not significantly heated. Most of the pyrolysis products with enhanced efficiencies were C5 oxygenates, suggesting formation from hemicellulosic precursor polymers in the corn stover. The findings suggest that biol. heating is disrupting the cell wall structure, fragmenting the hemicellulose or cellulose chains, and generating more polymer termini that have higher efficiency for generating the oxygenates at lower temperatures Further, anal. pyrolysis conducted at lower temperatures may be a beneficial strategy for improved biomass cell wall characterization, and for providing insights to understand and manage the feedstock variability to inform harvest and storage best management practices.

ACS Sustainable Chemistry & Engineering published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Safety of 3-Hydroxydihydrofuran-2(3H)-one.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Xu, Huan published the artcileStereocontrolled Entanglement-Directed Self-Alignment of Poly(lactic acid) Cylindrites, Category: tetrahydrofurans, the publication is Macromolecular Chemistry and Physics (2016), 217(23), 2567-2575, database is CAplus.

The concept of stereocontrolled entanglements, in which the tunable H-bonded chiral pairs serve as crosslinks to create topol. constraints on the local chain dynamics, is introduced to tailor the crystalline morphol. of stereocomplex poly(lactic acid). For the entanglements to be interconnected and activated, poly(D-lactic acid) with statistical branched architecture is incorporated, enabling the construction of 3D association with linear poly(L-lactic acid) chains. With thermodynamically graded disentanglement relaxation for the blends, the profound influence of entanglements on the crystalline morphol. is revealed during isothermal crystallization Orderly aligned cylindrites some with an exceptional length of over 500 μm, resembling the structural features of the classical shish-kebab superstructure, are observed in the blends penetrated with dense entanglement constraints. By contrast, only dendritic spherulites are formed in the highly disentangled blends. The selectively suppressed homo-crystallization by the entanglements offers insights into the contribution of constraints. This bottom-up strategy opens up pathways to engender oriented crystals of long-range order under quiescent conditions, which has potential implications for other chiral polymers.

Macromolecular Chemistry and Physics published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C15H14O, Category: tetrahydrofurans.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

James-Okoro, Paula-Peace O. published the artcilePhytochemical and in vitro antioxidant assessment of Yoyo bitters, Formula: C4H6O3, the publication is World News of Natural Sciences (2021), 1-17, database is CAplus.

In this paper, herbal bitters are widely used due to their numerous acclaimed health benefits in many Nigerian homes; however, many have not been subjected to scientific scrutiny. The aim of this study was to determine the phytochem. composition and antioxidant capacity of a non-alc. polyherbal formulation, Yoyo bitters, towards validating its broad pharmacol. claims. The phytochem. components of Yoyo bitters were ascertained by phytochem. screening assays and gas chromatog.-mass spectrometry (GC-MS). The antioxidant activity was investigated in vitro using 2,2-diphenyl-1-picryhydrazyl (DPPH) radical, hydrogen peroxide (H₂O₂) scavenging activity, total antioxidant capacity (TAC) and ferric reducing antioxidant power (FRAP) assays. Qual. phytochem. anal. of Yoyo bitters showed the presence of saponins, tannins, flavonoids, terpenoids, cardiac glycosides and anthocyanins. The total phenols, flavonoids, flavanols, tannins and carotenoids content were 14.741 ± 0.64 mg GAE/mL, 0.152 ± 0.01 mg RE/mL, 0.437 ± 0.02 mg RE/mL, 0.368 ± 0.04 mg TAE/mL and 0.016 ± 0.00 mg CAE/mL resp. GC-MS chromatogram revealed the presence of forty-three (43) phytochem. compounds with D-allose (41.81%), 1,6-anhydro-beta-D-glucofuranose (24.15%), 5-hydroxymethylfurfural (8.02%) and Z-6-pentadecen-1-ol acetate (3.50%) as the most abundant constituents. Yoyo bitters demonstrated effective antioxidant activity against DPPH and H₂O₂ with IC₅₀ values of 0.492 mg/mL and 0.629 mg/mL resp. compared to ascorbic acid of 0.161 mg/mL and 0.130 mg/mL resp. Total antioxidant capacity and ferric reducing antioxidant power of Yoyo bitters were 0.432 mg AAE/mL and 2.236 mg AAE/mL resp. This study validates the antioxidant capacity of Yoyo bitters and provides chem. basis for its acclaimed pharmacol. actions.

World News of Natural Sciences published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Formula: C4H6O3.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Vichi, Stefania published the artcileDetermination of volatile thiols in roasted coffee by derivatization and liquid chromatography-high resolution mass spectrometric analysis, Related Products of tetrahydrofurans, the publication is Food Research International (2014), 610-617, database is CAplus and MEDLINE.

A fast derivatization/extraction method followed by LC-ESI-HRMS was optimized for the determination of volatile thiols in roasted coffee powder, using ebselen as the derivatization agent. The anal. conditions were optimized on real coffee matrix, which was spiked with representative volatile thiols. The method sensitivity, precision, accuracy and selectivity were evaluated by using representative standard thiols. Estimated LOQs were between 0.02 and 14.8 ng/kg for the thiols evaluated. Recoveries and intra-day and inter-day RSD values obtained in coffee matrix were in general around 40% and between 11 and 30%, resp. The optimized and validated method was applied to real coffee samples. According to the established identification criteria, target thiols were identified and quantified in coffee powder samples. Among them, 4-mercapto-1-butanol and 2-methyl-3-tetrahydrofuranthiol were identified and quantified for the first time in roasted coffee. Moreover, an approach based on the formation of a diagnostic product ion was applied to detect non-target thiols, allowing the detection of nineteen thiol derivatives, fourteen of them were tentatively identified on the basis of their mol. formula. Some of them, such as methanethiol and 3-mercapto-3-methylbutyl acetate were known to be present in coffee volatile fraction, while the rest were not previously described in this product.

Food Research International published new progress about 57124-87-5. 57124-87-5 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Thiol, name is 2-Methyl-3-tetrahydrofuranthiol, and the molecular formula is C17H16O2, Related Products of tetrahydrofurans.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Chen, Haitao published the artcileFormula structure of liquid beef flavor, COA of Formula: C5H10OS, the publication is Shipin Gongye Keji (2009), 30(12), 326-331, database is CAplus.

The formula structure of flavors is instructive to flavoring. The volatile constituents of 11 liquid beef flavor samples from the market were analyzed by headspace-single drop condensation (HS-SDC) and GC/MS. The framework of liquid beef flavor was summarized by analyzing the type of the detected materials. It was proved that non-meat elements were absolutely necessary in the framework of beef flavor. A good beef flavor should be a great combination of meat flavor material and various types of non-meat elements. One liquid beef flavor was developed based on this research.

Shipin Gongye Keji published new progress about 57124-87-5. 57124-87-5 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Thiol, name is 2-Methyl-3-tetrahydrofuranthiol, and the molecular formula is C5H10OS, COA of Formula: C5H10OS.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Zhi, Xiao-yan published the artcileNatural product-based semisynthesis and biological evaluation of thiol/amino-Michael adducts of xanthatin derived from Xanthium strumarium as potential pesticidal agents, Category: tetrahydrofurans, the publication is Bioorganic Chemistry (2020), 103696, database is CAplus and MEDLINE.

Xanthatin, a natural sesquiterpene lactone, occurs as one of the major constituents of Xanthium plants (Compositae) and exhibits many important biol. properties. To discover natural products-based pesticides, forty-nine Michael-type thiol/amino adducts of xanthatin were synthesized and characterized, while their pesticidal activities were investigated. Among them, compounds 2c, 2h, 2i, and 2t exhibited more potent antifungal activity against Botrytis cinerea (IC₅₀ = 0.96, 0.38, 6.33, and 7.21μg/mL, resp.) than xanthatin and the two com. fungicides. Compounds 2t and 2u displayed broad-spectrum and excellent antifungal effects against all tested phytopathogenic fungi, while their IC₅₀ values ranged from 7.21 to 75.88μg/mL. Compounds 2a, 2f, 2l, 2m, 2v, 7c, 7e, 7h, 7i, and 7j showed moderate larvicidal activity against Plutella xylostella Linnaeus. Furthermore, compounds 2b, 7g, and 7h demonstrated significant ovicidal activity against P. xylostella with the LC₅₀ values of 14.04, 10.00, and 11.95 mg/L, resp. These findings suggest that thiol/amino appended in the C-13 position of xanthatin may improve antifungal and ovicidal activities for the derivatives It was also noticed that the exocyclic double bond of xanthatin is crucial for its larvicidal activity. This work also provides some important hints for further design, synthesis, and structural modification of the xanthanolides sesquiterpene lactones toward development of the new environmentally friendly pesticides for sustainable agricultural production

Bioorganic Chemistry published new progress about 57124-87-5. 57124-87-5 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Thiol, name is 2-Methyl-3-tetrahydrofuranthiol, and the molecular formula is C13H10F2, Category: tetrahydrofurans.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Singh, Sandip K. published the artcileIonic liquids catalyzed lignin liquefaction: mechanistic studies using TPO-MS, FT-IR, RAMAN and 1D, 2D-HSQC/NOSEY NMR, Formula: C4H6O3, the publication is Green Chemistry (2016), 18(14), 4098-4108, database is CAplus.

Valorization of a profusely available alternate resource, biomass and in particular its 3-D intricate component lignin into low mol. weight aromatic products are used as platform chems. and fuel additives, and developing a low temperature catalytic process is imperative in preserving atom efficiency. Ionic liquids, due to their unique properties, offer an advantage to develop such methods under milder conditions. Herein, we show use of -SO₃H functionalized imidazolium based various recyclable Bronsted acidic ionic liquids (BAILs) in catalytic quantity under ambient pressure at 120 °C for depolymerization of lignin (60 000 g mol^-1) into THF soluble products with high efficiency (78% yield, 95% ± 5% mass balance). The decoding of this efficiency by 1D and 2D (HSQC/NOSEY) NMR, FT-IR and RAMAN studies exemplify that the -OH group(s) interact with the electron deficient BAIL cation. The mechanistic insights unraveled in this study open a plethora of opportunities to design catalysts for developing efficient processes.

Green Chemistry published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C10H11ClO2S, Formula: C4H6O3.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Branca, C. published the artcileExperimental analysis about the exploitation of industrial hemp (Cannabis sativa) in pyrolysis, Recommanded Product: 3-Hydroxydihydrofuran-2(3H)-one, the publication is Fuel Processing Technology (2017), 20-29, database is CAplus.

The pyrolytic conversion of industrial hemp (Cannabis sativa), subjected to various pretreatments, and its parts (woody core and fibers) has been investigated. For the conditions of thermal anal., dominated by primary decomposition, the qual. features of hemp and woody core devolatilization are practically coincident with those of wheat straw and beech wood, resp. Retting and decortication significantly affect the magnitude and position of the peak rate and the char yield. Fiber decomposition, though reflecting the qual. behavior of the majoritarian component cellulose, is deeply affected by hemicellulose/lignin/ash contamination. Packed-bed pyrolysis reproduces the qual. similarities between hemp and wheat straw, on one side, and woody core and beech wood, on the other, mainly in relation to the thermal field (magnitude of reaction-induced overheating) with differences in the yields/composition of the lumped classes of products.

Fuel Processing Technology published new progress about 19444-84-9. 19444-84-9 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Ester,Alcohol, name is 3-Hydroxydihydrofuran-2(3H)-one, and the molecular formula is C4H6O3, Recommanded Product: 3-Hydroxydihydrofuran-2(3H)-one.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Sun, Bao-guo published the artcileRelationship of molecular structure of sulfur-containing flavoring compounds to meat flavor, Synthetic Route of 57124-87-5, the publication is Jingxi Huagong (2001), 18(8), 456-460, database is CAplus.

Based on the research on the mol. structure of organic sulfur-containing compounds with meat flavors, we found that the meat flavors are developed by the synergetic effect of a sulfur atom with another sulfur or oxygen atom connected to the adjacent carbon atoms.

Jingxi Huagong published new progress about 57124-87-5. 57124-87-5 belongs to tetrahydrofurans, auxiliary class Tetrahydrofuran,Thiol, name is 2-Methyl-3-tetrahydrofuranthiol, and the molecular formula is C15H10O2, Synthetic Route of 57124-87-5.

Referemce:
https://en.wikipedia.org/wiki/Tetrahydrofuran,
Tetrahydrofuran | (CH2)3CH2O – PubChem