Tag: M.W=200-250

Zhang, Mengxin published the artcileA composite polymer of polystyrene coated with poly(4-vinylpyridine) as a sorbent for the extraction of synthetic dyes from foodstuffs, SDS of cas: 3052-61-7, the publication is Analytical Methods (2020), 12(24), 3156-3163, database is CAplus and MEDLINE.

A poly(St-co-EGDMA)@poly(4-vinylpyridine-co-EGDMA) composite polymer was synthesized by precipitation reversible addition-fragmentation chain transfer (RAFT) polymerization The polymer was investigated as a sorbent for extraction of synthetic food dyes: ponceau 4R, tartrazine, sunset yellow, brilliant blue and erythrosine from soft drinks. The morphol. and composition of the polymer were characterized and confirmed resp. by SEM and Fourier-transform IR spectroscopy. The pH dependence experiment revealed that the adsorption of food dyes by the polymer was pH dependent and the maximum adsorption was achieved at pH 3. Adsorption between the polymer and the dyes was mainly due to electrostatic interaction. Under the optimized pH conditions, the polymer was saturated with the dye solutions at a concentration of about 200μg mL^-1 and exhibited a maximum adsorption capacity of 9μg mg^-1. The values were higher than those for polyamide, a sorbent used in the standard method. The recovery from the real samples of the three spiked concentrations 10, 50 and 100μg mL^-1 was resp. within the ranges of 83.2-107.2%, 94.5-110.7% and 79.2-111.5%, with a SD within ±4%. The sorbent could be reused more than 10 times with a recovery higher than 80%. The small volume requirement of the sample and sorbent during the sample pre-treatment, indicated that poly(St-co-EGDMA)@poly(4-vinylpyridine-co-EGDMA) was a potential material for food dye extraction in an environment-friendly and economical manner.

Analytical Methods published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C8H5IO, SDS of cas: 3052-61-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Guo, Guangzhong published the artcileDetermination of the position of double bonds by micro ozone oxidation reaction, Application In Synthesis of 16974-11-1, the publication is Youji Huaxue (1982), 465-6, database is CAplus.

The positions of double bonds in some long-chain alkenol acetates, e.g., insect pheromones, were determined by micro O₃ oxidation O₃, generated from an O-N gas mixture by elec. discharge, was passed through the alkenol acetate sample solutions, and the resulting ketones or aldehydes were analyzed by gas chromatog. and mass spectrometry. The alkenol acetates identified were (Z)-8- and (Z)-9-dodecen-1-ol acetates and (E)-10-,(E)-12-tetradecen-1-ol acetates.

Youji Huaxue published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Application In Synthesis of 16974-11-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Liu, Junzhi published the artcileInfrared and Raman spectra of long-chain mono-unsaturated alcohol esters, COA of Formula: C14H26O2, the publication is Canadian Journal of Spectroscopy (1990), 35(1), 5-10, database is CAplus.

The IR and Raman spectra of eleven long-chain mono-unsaturated alc. esters have been investigated both at room temperature and below the f.p. temperature (solid state). The differences between the observed spectra are discussed in terms of the structural differences in these mols.

Canadian Journal of Spectroscopy published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, COA of Formula: C14H26O2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ding, Bao-jian published the artcileBiosynthesis of the Sex Pheromone Component (E,Z)-7,9-Dodecadienyl Acetate in the European Grapevine Moth, Lobesia botrana, Involving Δ11 Desaturation and an Elusive Δ7 Desaturase, Computed Properties of 16974-11-1, the publication is Journal of Chemical Ecology (2021), 47(3), 248-264, database is CAplus and MEDLINE.

The European grapevine moth, Lobesia botrana, uses (E,Z)-7,9-dodecadienyl acetate as its major sex pheromone component. Through in vivo labeling experiments we demonstrated that the doubly unsaturated pheromone component is produced by Δ11 desaturation of tetradecanoic acid, followed by chain shortening of (Z)-11-tetradecenoic acid to (Z)-9-dodecenoic acid, and subsequently introduction of the second double bond by an unknown Δ7 desaturase, before final reduction and acetylation. By sequencing and analyzing the transcriptome of female pheromone glands of L. botrana, we obtained 41 candidate genes that may be involved in sex pheromone production, including the genes encoding 17 fatty acyl desaturases, 13 fatty acyl reductases, 1 fatty acid synthase, 3 acyl-CoA oxidases, 1 acetyl-CoA carboxylase, 4 fatty acid transport proteins and 2 acyl-CoA binding proteins. A functional assay of desaturase and acyl-CoA oxidase gene candidates in yeast and insect cell (Sf9) heterologous expression systems revealed that Lbo_PPTQ encodes a Δ11 desaturase producing (Z)-11-tetradecenoic acid from tetradecanoic acid. Further, Lbo_31670 and Lbo_49602 encode two acyl-CoA oxidases that may produce (Z)-9-dodecenoic acid by chain shortening (Z)-11-tetradecenoic acid. The gene encoding the enzyme introducing the E7 double bond into (Z)-9-dodecenoic acid remains elusive even though we assayed 17 candidate desaturases in the two heterologous systems.

Journal of Chemical Ecology published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Computed Properties of 16974-11-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhong, Yongzhi published the artcilePBP1 plays key roles in sex pheromone reception of the fall armyworm, Quality Control of 16974-11-1, the publication is International Journal of Biological Macromolecules (2022), 162-169, database is CAplus and MEDLINE.

Spodoptera frugiperda among the China population employs a four-component sex pheromone blend to accelerate male-female allocation and mating behavior. The underlying mol. mechanism has been incompletely elucidated. In the current study, we showed that differences existed between genders toward the four sex pheromone components, including Z9-14:AC, Z7-12:AC, Z9-12:AC, and Z11-16:AC, in terms of electrophysiol. responses and behavioral valences. Male adults were significantly more sensitive to all tested compounds than female adults. Furthermore, ecol. outputs may be related to four pheromone-binding proteins, namely, SfruPBP1, SfruPBP2, SfruPBP3, and SfruPBP4. They formed four distinct clades within the lepidopteran phylogeny, and male adults expressed significantly higher levels of SfruPBP1 and SfruPBP2 than female adults. We observed the highest binding affinities of SfruPBP1 toward all four sex pheromone components. SfruPBP4 had moderate binding affinities for Z7-12:AC, Z11-16:AC, and Z9-12:AC, while SfruPBP2 showed binding toward Z9-14:AC. This observation suggests that SfruPBP1 plays a key role in sex pheromone discrimination and drives sexually biased behavioral decisions toward certain pheromone components. These findings will help to develop behavioral-mediating tools as part of integrated pest management approaches for this cross-border pest.

International Journal of Biological Macromolecules published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C6H8N2, Quality Control of 16974-11-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kongkaew, A. published the artcilePolymerization of isoprene by using benzyl diethyldithiocarbamate as an iniferter, COA of Formula: C12H17NS2, the publication is ScienceAsia (1999), 25(1), 35-41, database is CAplus.

The polymerization of isoprene using of benzyl N,N-diethyldithiocarbamate (BDC) as iniferter was investigated. The monomer concentration was kept constant at 2.8 mol/L while the BDC concentration was varied. The product, characterized by FTIR, ¹H-NMR and DSC, was mainly 1,4-polyisoprene. The mol. weight, polydispersity, and percentage yield of the polymer were affected by the BDC concentration The yield increased initially, and then decreased after a critical BDC concentration was reached. The mol. weightdecreased with BDC concentration The polydispersity was 1.8-4.7 and decreased with increasing BDC concentration

ScienceAsia published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, COA of Formula: C12H17NS2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Kongkaew, A. published the artcileSynthesis of polyisoprene-poly(methyl methacrylate) block copolymers by using polyisoprene as a macro-iniferter, Formula: C12H17NS2, the publication is Polymer Bulletin (Berlin) (1999), 43(4-5), 327-332, database is CAplus.

Polyisoprene (PI) was prepolymerized by using benzyl diethyldithiocarbamate (BDC) as an iniferter. The obtained PI was subsequently used to react with Me methacrylate (MMA) in order to investigate whether the relevant block copolymers can be achieved. Results from ¹H-NMR and GPC reveal that the PI-PMMA block copolymers were formed. This suggests that polymerization of isoprene through the use of BDC proceeded via a (pseudo) “living” mechanism.

Polymer Bulletin (Berlin) published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Formula: C12H17NS2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Ma, Yuhong published the artcileSynthesis of functional polyisobutene I. Copolymerization of isobutene with 4-vinylbenzyl N,N-diethyldithiocarbamate, Safety of Benzyl diethylcarbamodithioate, the publication is Polymer Bulletin (Berlin, Germany) (2002), 47(5), 407-413, database is CAplus.

A special monomer 4-vinylbenzyl N,N-diethyldithiocarbamate (VBDC) was synthesized firstly, and then the cationic copolymerization of VBDC with isobutene was investigated. The results of ¹H-NMR, EA and GPC (with UV detector) indicated that VBDC could copolymerize with isobutene and form the copolymer, and the units of VBDC incorporated into copolymer chains increased with the increasing of the feed ratio of VBDC. However, there has apparent discrepancy between the VBDC in the monomer feed and the VBDC incorporated into the copolymer chain, which is probably due to the relatively lower reactivity of VBDC. In the presence of VBDC, the MWD is narrower than that of in absence of VBDC under the similar exptl. conditions. For cumyl Me ether/TiCl₄ initiating system, the M_w/M_n could be slightly narrowed from 1.55 (no VBDC) to 1.33 (with VBDC) in the mixed solvents of n-hexane and CH₃Cl (15/10, V/V), while cumyl chloride /TiCl₄ initiating system, the M_w/M_n is narrowed from about 5.0 (no VBDC) to about 1.5 (with VBDC) with n-hexane and CH₂Cl₂ (10/10, V/V) as the mixed solvents. When benzyl N, N-diethyldithiocarbamate (BDC) was used as the model compounds instead of the VBDC, the similar results of M_w/M_n were obtained. These results demonstrated that the VBDC functions as the monomer electron donor (ED) in this polymerization system.

Polymer Bulletin (Berlin, Germany) published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Safety of Benzyl diethylcarbamodithioate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Tao, Kang published the artcileSynthesis and characterization of a novel two-component organogelator based on ion-bonded discotic complex, COA of Formula: C15H14O3, the publication is Journal of Molecular Liquids (2008), 142(1-3), 118-123, database is CAplus.

A novel ion-bonded discotic complex was prepared from 2,3,6,7,10,11-hexakis(N,N-dimethylaminopropylaminocarbonylmethoxy)triphenylene (HDTP) and 4′-dodecyloxybiphenyl-4-carboxylic acid (DBC) by ionic self-assembly (ISA) route and characterized by Fourier transform IR (FTIR) spectrum. We found that the complex can self-assemble into stable gels in aromatic hydrocarbons. Nanofibers with diameters of 50-130 nm were observed in the gels by transmission electron micrograph (TEM). The FTIR data in conjunction with UV-vis and fluorescence spectra suggested that the aggregation of the complex into elongated fibers in solution was induced by a directional extended network of hydrogen bonds and π-π interactions. Based on the experiment anal., we proposed a tentative model of the self-assembly of this two-component gel-phase material.

Journal of Molecular Liquids published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C13H9FO2, COA of Formula: C15H14O3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Viswanathan, Karthickeyan published the artcileEffects of antioxidant and ceramic coating on performance enhancement and emission reduction of a diesel engine fueled by Annona oil biodiesel, COA of Formula: C10H12O5, the publication is Journal of the Taiwan Institute of Chemical Engineers (2021), 243-256, database is CAplus.

A broad investigation on alternative source of energy has been going on to find a solution to multi-faceted fossil fuel concerns namely exhaustion of fuels, energy demand, harmful emissions and environmental impact. Biodiesel is an environment-friendly and renewable alternative for diesel. In the present work, Annona seed oil has been assessed as a potential feedstock for biodiesel production A100 was characterized by FTIR and GC-MS. Pr Gallate (PG) was characterized by morphol. study using FESEM. The elemental anal. of PG was measured using EDAX anal. YPSZ coating was found suitable to make out the potential of A100 in diesel engine. PCCU was designed to reduce the emissions by the liquid reductant in the catalyst system. The process optimization was performed by RSM and factorial exptl. design. With the YPSZ coated engine, improved characteristics of combustion and performance were noticed with A100+PG. A significant diminution on CO, HC and smoke emissions were perceived with A100+PG+CE. In addition, the work was expanded with the application PCCU for the lessening of NOx. A gradual decrement in NOx was observed with A100+PG+CE. Subsequently, A100+PG+CE with PCCU was deliberated as more prominent than other fuel samples in view of its engine characteristics.

Journal of the Taiwan Institute of Chemical Engineers published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C23H20BN, COA of Formula: C10H12O5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics