U.S. flag

An official website of the United States government

PubAg

Main content area

You searched for: Subject "acetates" Remove constraint Subject: "acetates"
Start Over

Search

29,063  Search Results

« Previous | 1 - 20 of 29,063 |
Number of results to display per page

Search Results

1. An investigation on catalytic performance and reaction mechanisms of Fe/OMS-2 for the oxidation of carbon monoxide, ethyl acetate, and toluene

Author:
Dong, Ning; Chen, Mengyue; Ye, Qing; Zhang, Dan; Dai, Hongxing
Source:
Journal of environmental sciences (China) 2022 v.112 pp. 258-268
ISSN:
1001-0742
Subject:
ethyl acetate,   etc   ; carbon dioxide; carbon monoxide; catalysts; catalytic activity; oxidation; oxygen; temperature; toluene; China;     Show all 10 Subjects
Abstract:
... The octahedral molecular sieve (OMS-2)-supported Fe (xFe/OMS-2: x = 1, 3, 5, and 10) catalysts were prepared using the pre-incorporation method. Physicochemical properties of the as-synthesized materials were characterized by means of various techniques, and their catalytic activities for CO, ethyl acetate, and toluene oxidation were evaluated. Among all of the samples, performed the best, with th ...
DOI:
10.1016/j.jes.2021.05.009

2. Synergistic effects in Mn-Co mixed oxide supported on cordierite honeycomb for catalytic deep oxidation of VOCs

Author:
Zhao, Hongyang; Wang, Hui; Qu, Zhenping
Source:
Journal of environmental sciences (China) 2022 v.112 pp. 231-243
ISSN:
1001-0742
Subject:
ethyl acetate,   etc   ; catalysts; catalytic activity; combustion; cordierite; oxygen; pollutants; temperature; toluene; ultrasonics; China;     Show all 11 Subjects
Abstract:
... A series of Co-Mn mixed oxide catalyst supported on a cordierite monolith was facilely synthesized by ultrasonic impregnation. Its catalytic performance was evaluated in the combustion of toluene, ethyl acetate and its mixture. It was observed that with incorporating Mn into Co₃O₄, the formation of solid solution with spinel structure could significantly improve the catalytic activity of pure phas ...
DOI:
10.1016/j.jes.2021.05.003

3. Combination of single-point standard addition calibration and natural internal standardization for quantification of terpenes in Pisco samples

Author:
Uribe, Christian; Cosio, Eric
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2021 v.147 pp. 111551
ISSN:
0023-6438
Subject:
acetates,   etc   ; linalool; uncertainty;     Show all 3 Subjects
Abstract:
... Combination of single-point standard addition calibration and natural internal standardization was investigated as a practical strategy for the quantification of terpenes in Pisco samples using HS-SPME-GC-MS. All GC-MS data were acquired under simultaneous Full Scan and SIM modes using two quantification strategies identified as “reference strategy” and “simplified strategy”. Linearity was first c ...
DOI:
10.1016/j.lwt.2021.111551

4. Carbazole sulfonamide-based macrocyclic receptors capable of selective complexation of fluoride ion

Author:
Luo, Na; Li, Junhong; Sun, Tao; Wan, Suran; Li, Peijia; Wu, Nan; Yan, Ya; Bao, Xiaoping
Source:
RSC advances 2021 v.11 no.17 pp. 10203-10211
ISSN:
2046-2069
Subject:
acetates,   etc   ; acetonitrile; fluorides; phosphates;     Show all 4 Subjects
Abstract:
... Two carbazole sulfonamide-based macrocycles 1 and 2 were facilely synthesized and carefully evaluated for their anion recognition properties. The obtained results revealed that macrocycle 1 with a 1,3-xylyl linker was able to bind fluoride ion more strongly and selectively in acetonitrile medium than its strong competitors (like acetate and dihydrogen phosphate anions), with a large binding consta ...
DOI:
10.1039/d1ra01285a

5. Organotin-catalyzed synthesis of hydroxyalkylamides from lactones via a ring-opening process

Author:
Liang, Xiayu; Yu, Peng; Fu, Chen; Shen, Yongcun
Source:
Tetrahedron letters 2021 v.66 pp. 152821
ISSN:
0040-4039
Subject:
acetates,   etc   ; dibutyltin; lactones; synthesis;     Show all 4 Subjects
Abstract:
... A new strategy for the facile synthesis of hydroxyalkylamides through the ring-opening reaction of lactone with amine promoted by dibutyltin acetate was developed. A series of hydroxyalkylamide compounds were obtained and the method was successfully applied to the synthesis of pharmaceutically active molecules tyrosinase inhibitor V and HDAC inhibitor VI via a three-step synthetic pathway. The bro ...
DOI:
10.1016/j.tetlet.2021.152821

6. Iridium-catalyzed selective ortho C[sbnd]H carbenoid functionalization of N-aryl-7-azaindoles with diazotized Meldrum’s acid

Author:
Yu, Jin-Tao; Shan, Yujia; Yuan, Cheng; Pan, Changduo
Source:
Tetrahedron letters 2021 v.62 pp. 152703
ISSN:
0040-4039
Subject:
acetates,   etc   ; regioselectivity; yields;     Show all 3 Subjects
Abstract:
... An iridium-catalyzed selective ortho CH carbenoid functionalization of N-aryl-7-azaindoles with α-diazotized Meldrum’s acid was developed, affording a series of 7-azaindole containing aryl acetates in excellent to good yields. This procedure is simple, mild with high regioselectivity and broad substrate scope. ...
DOI:
10.1016/j.tetlet.2020.152703

7. Effects of different carbon sources on the removal of ciprofloxacin and pollutants by activated sludge: Mechanism and biodegradation

Author:
Cai, Yixiang; Yan, Zhiyong; Ou, Yingjuan; Peng, Boshang; Zhang, Lihua; Shao, Jihai; Lin, Yiqing; Zhang, Jiachao
Source:
Journal of environmental sciences (China) 2022 v.111 pp. 240-248
ISSN:
1001-0742
Subject:
sodium acetate,   etc   ; Acidobacteria; Microbacterium; Rhodanobacter; activated sludge; biodegradation; carbon; ciprofloxacin; denitrification; glucose; nitrates; nitrification; nitrites; quantitative polymerase chain reaction; wastewater; China;     Show all 16 Subjects
Abstract:
... This research investigated the effects of ciprofloxacin (CIP) (0.5, 5, and 20 mg/L) on SBR systems under different carbon source conditions. Microbial community abundance and structure were determined by quantitative PCR and high-throughput sequencing, respectively. The biodegradation production of CIP and possible degradation mechanism were also studied. Results showed that CIP had adverse effect ...
DOI:
10.1016/j.jes.2021.03.037

8. Effect of Capping Ligand Engineering on Transport Properties and Carrier Dynamics in Cubic CsPbI₃ Nanocrystal Film

Author:
Sarkar, Sohini; Banerjee, Sneha; Swarnkar, Abhishek; Mandal, Pankaj
Source:
Journal of physical chemistry 2021 v.125 no.19 pp. 10539-10548
ISSN:
1932-7455
Subject:
acetates; lead acetate,   etc   ; ligands; nanocrystals; physical chemistry; solar cells; spectroscopy;     Show all 7 Subjects
Abstract:
... Cubic (α) phase CsPbI₃ perovskite nanocrystals (NCs) are highly sought-after solar cell materials due to their appropriate bandgap of 1.73 eV. Nevertheless, the NCs are capped by insulating organic ligands. For utilizing these NCs in device fabrication, dot-to-dot electronic transport is essential, which can be achieved by removing the capping ligands by washing with methyl acetate and lead acetat ...
DOI:
10.1021/acs.jpcc.1c02350

9. Structure elucidation and NMR assignments of a new alkaloid from Panzerina lanata (L.) Soják

Author:
Li, Genyu; Wang, Qinghu; He, Xiang; Bao, Wenqiang; Pa, Biligetu
Source:
Natural product research 2021 v.35 no.3 pp. 436-439
ISSN:
1478-6427
Subject:
ethyl acetate,   etc   ; alkaloids; research; spectroscopy;     Show all 4 Subjects
Abstract:
... A new alkaloid, named as panalasin (1), was isolated from the ethyl acetate extract from Panzerina lanata (L.) Soják. The structure of 1 was elucidated by spectroscopic methods, including UV, IR, HR-ESI-MS and extensive 1D and 2D NMR techniques. ...
DOI:
10.1080/14786419.2019.1636240

10. Influence of substitution at the 5α-Position on the side chain conformation of glucopyranosides

Author:
Rajasekaran, Parasuraman; Pirrone, Michael G.; Crich, David
Source:
Carbohydrate research 2021 v.500 pp. 108254
ISSN:
0008-6215
Subject:
acetates,   etc   ; carbohydrates; molecular conformation; research;     Show all 4 Subjects
Abstract:
... We describe the preparation of methyl 5α-methyl-α-d-glucopyranoside and of 5α-fluoro-β-d-glucopyranose per acetate and the NMR-based conformational analysis of their side chains. Both the 5α-methyl and 5α-fluoro substituents increase the population of the gauche,gauche side chain conformer to the extent that it becomes the predominant conformation. In the 5α-methyl series this is attributed to ste ...
DOI:
10.1016/j.carres.2021.108254

11. Ammonium acetate as a novel buffer for highly selective robust urinary HPLC-ICP-MS arsenic speciation methodology

Author:
Rodríguez, P.F.; Martín-Aranda, R.M.; López Colón, J.L.; de Mendoza, J.H.
Source:
Talanta 2021 v.221 pp. 121494
ISSN:
0039-9140
Subject:
ammonium acetate,   etc   ; arsenic; chromatography; toxicology;     Show all 4 Subjects
Abstract:
... Ammonium acetate is employed in order to develop a novel HPLC-ICP-MS arsenic speciation methodology applicable to six arsenic species, i.e, AC, AB, Asᴵᴵᴵ, Asⱽ, DMA and MMA. The most predominant species in the toxicological field are covered in a 30-min chromatogram with reproducible and repeatability peak area ratio. Moreover, typical problems from traditional methods are sorted out by using a rob ...
DOI:
10.1016/j.talanta.2020.121494

12. Ruthenium(II)-Catalyzed Redox-Neutral C–H Alkylation of Arylamides with Unactivated Olefins

Author:
Shambhavi, Chikkabagilu Nagaraju; Jeganmohan, Masilamani
Source:
Organic letters 2021 v.23 no.12 pp. 4849-4854
ISSN:
1523-7052
Subject:
acetates,   etc   ; alkenes; alkylation; moieties; protonation; ruthenium;     Show all 6 Subjects
Abstract:
... A Ru(II)-catalyzed weak chelating group-aided ortho-C–H alkylation of arylamides with unactivated olefins in a redox-neutral fashion has been demonstrated. The present alkylation reaction was well-suited for various substituted arylamides and unactivated aliphatic alkenes. In this alkylation reaction, pivalic acid plays dual role in which it delivers the proton source in a protonation step and the ...
DOI:
10.1021/acs.orglett.1c01575

13. Replacing halogenated solvents by a butyl acetate solution of bisphenol S in the transformations of indoles

Author:
Gao, Feng; Ferlin, Francesco; Bai, Rongxian; Li, Minghao; Vaccaro, Luigi; Gu, Yanlong
Source:
Green chemistry 2021 v.23 no.10 pp. 3588-3594
ISSN:
1463-9270
Subject:
acetates,   etc   ; bisphenol S; green chemistry; indoles; solvents;     Show all 5 Subjects
Abstract:
... A butyl acetate solution of bisphenol S (BPS) was proved to be able to replace hazardous halogenated solvents in the transformation of indoles. Measurement with Kamlet–Taft solvatochromic parameters disclosed that the polarity of the BPS-containing butyl acetate was enhanced greatly. The protocol not only conferred a convenient way to minimize the use of halogenated solvents in the synthesis of in ...
DOI:
10.1039/d1gc00778e

14. Regulating the Film Growth and Reducing the Defects for Efficient CsPbIBr₂ Solar Cells

Author:
Chen, Zhu; Wang, Qian; Xu, Yinyan; Zhou, Ru; Zhang, Lun; Huang, Yang; Hu, Linhua; Lyu, Mei; Zhu, Jun
Source:
ACS applied materials & interfaces 2021 v.13 no.21 pp. 24654-24661
ISSN:
1944-8252
Subject:
acetates,   etc   ; crystallization; lead; volatile organic compounds;     Show all 4 Subjects
Abstract:
... Inorganic lead halide perovskite CsPbIBr₂ possesses good stability with a suitable band gap for tandem solar cells. Decreasing the defect concentration and improving the film quality is crucial to further increase the power conversion efficiency of CsPbIBr₂ solar cells. Here, the crystallization dynamics of CsPbIBr₂ films is regulated by introducing the volatile organic salt, formamidinium acetate ...
DOI:
10.1021/acsami.1c02377

15. Palladium-Catalyzed Isoquinoline Synthesis by Tandem C–H Allylation and Oxidative Cyclization of Benzylamines with Allyl Acetate

Author:
Chen, Yujie; Huang, Zhibin; Dai, Chenyang; Yang, Shan; Shi, Da-Qing; Zhao, Yingsheng
Source:
Organic letters 2021 v.23 no.11 pp. 4209-4213
ISSN:
1523-7052
Subject:
acetates,   etc   ; allylation; amination; aromatization; benzylamines; palladium;     Show all 6 Subjects
Abstract:
... A novel approach to synthesize 3-methylisoquinolines via a one-pot, two-step, palladium(II)-catalyzed tandem C–H allylation/intermolecular amination and aromatization is reported. A wide series of 3-methylisoquinoline derivatives were obtained directly using this method in moderate to good yields, and we highlight the synthetic importance of this new transformation. ...
DOI:
10.1021/acs.orglett.1c01153

16. High-level production of l-homoserine using a non-induced, non-auxotrophic Escherichia coli chassis through metabolic engineering

Author:
Zhang, Yu; Wei, Minhua; Zhao, Guihong; Zhang, Wenjie; Li, Yingzi; Lin, Beibei; Li, Yanjun; Xu, Qingyang; Chen, Ning; Zhang, Chenglin
Source:
Bioresource technology 2021 v.327 pp. 124814
ISSN:
0960-8524
Subject:
acetates,   etc   ; Escherichia coli; amino acids; fermentation;     Show all 4 Subjects
Abstract:
... l-Homoserine is a valuable non-proteinogenic amino acid used in the synthesis of various important compounds. Microbial fermentation has potential value for producing l-homoserine on a large scale, but suffers from a low yield and the need for expensive additives. In this study, a non-induced, non-auxotrophic, plasmid-free Escherichia coli chassis for the high-efficiency production of l-homoserine ...
DOI:
10.1016/j.biortech.2021.124814

17. Efficacy of clomiphene citrate in augmenting fertility of anoestrous goats

Author:
Gupta, Chhavi; Murugan, M.; Ramprabhu, R.; Pandian, S.; Kumar, Sathesh; Saravana, A. Serma
Source:
Indian journal of small ruminants 2021 v.27 no.1 pp. 47-49
ISSN:
0973-9718
Subject:
acetates,   etc   ; anestrus; citrates; humans; semen; ultrasonography; India;     Show all 7 Subjects
Abstract:
... A study was designed to assess the efficiency of clomiphene citrate in augmenting fertility in anoestrous goats. Fifty-two pluriparous goats (2-6 yr old) with the history of anoestrus since last kidding were taken for the study. Animals were divided into two groups. Animals of Gr-I (n=26) were treated with TANUVAS mineral mixture type 2 (10 g/day) for 20 days orally. Animals of Gr-II (n=26) were t ...
DOI:
10.5958/0973-9718.2021.00005.2

18. Rational Strategy for Space-Confined Seeded Growth of ZnO Nanowires in Meter-Long Microtubes

Author:
Kamei, Ryoma; Hosomi, Takuro; Kanao, Eisuke; Kanai, Masaki; Nagashima, Kazuki; Takahashi, Tsunaki; Zhang, Guozhu; Yasui, Takao; Terao, Jun; Otsuka, Koji; Baba, Yoshinobu; Kubo, Takuya; Yanagida, Takeshi
Source:
ACS applied materials & interfaces 2021 v.13 no.14 pp. 16812-16819
ISSN:
1944-8252
Subject:
zinc acetate,   etc   ; chemical reactions; mass spectrometry; nanowires;     Show all 4 Subjects
Abstract:
... Seeded crystal growths of nanostructures within confined spaces offer an interesting approach to design chemical reaction spaces with tailored inner surface properties. However, such crystal growth within confined spaces tends to be inherently difficult as the length increases as a result of confinement effects. Here, we demonstrate a space-confined seeded growth of ZnO nanowires within meter-long ...
DOI:
10.1021/acsami.0c22709

19. Synthesis of 1,10-decanediol diacetate and 1-decanol acetate from furfural

Author:
Deng, Chen-Qiang; Jiang, Qin-Zhu; Deng, Jin; Fu, Yao
Source:
Green chemistry 2021 v.23 no.5 pp. 2169-2176
ISSN:
1463-9270
Subject:
acetates,   etc   ; acetic acid; catalysts; furfural; green chemistry;     Show all 5 Subjects
Abstract:
... A green and efficient method was developed for upgrading furfural to 1,10-decanediol diacetate and 1-decanol acetate. 92% yield of the acetates was obtained through the tandem benzoin condensation and hydrodeoxygenation reaction. During the benzoin condensation, furfural was catalyzed into furoin in a quantitative yield by the immobilized NHC catalyst under solvent-free conditions. After dissolvin ...
DOI:
10.1039/d1gc00227a

20. Brønsted acid-catalyzed Friedel-Crafts-type alkylation of arenes with α-aryl diazoacetates

Author:
Chen, Wenming; Chen, Guifang; Wang, Biao; Wang, Wei; Huang, Wei; Tian, Xu
Source:
Tetrahedron letters 2021 v.66 pp. 152751
ISSN:
0040-4039
Subject:
acetates,   etc   ; alkylation; aromatic hydrocarbons; protocols; yields;     Show all 5 Subjects
Abstract:
... An efficient Brønsted acid-catalyzed Friedel-Crafts-type alkylation of arenes with α-aryl diazoacetates has been developed. This protocol enables effective access to various highly functionalized diarylmethane derivatives in moderate to high yields. Moreover, the product of selected diaryl acetate could be transformed to β, β-diaryl substituted γ-butyrolactone. ...
DOI:
10.1016/j.tetlet.2020.152751