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1. Synthesis of selenoglycosides and selenium linked disaccharides using reductive cleavage of diselenides

Author:
Pradip Shit; Samim Sahaji; Anup Kumar Misra
Source:
Carbohydrate research 2022 v.516 pp. 108554
ISSN:
0008-6215
Subject:
potassium hydroxide,   etc   ; hydrazine; research; selenium;     Show all 4 Subjects
Abstract:
... Reduction of diselenides using a combination of hydrazine monohydrate and potassium hydroxide (KOH) followed by the treatment of the selenolate ions generated in situ with glycosyl halides under a one-pot, two-step phase transfer reaction condition resulted in the formation of beta-selenoglycosides in excellent yield. In addition, selenium linked disaccharide derivatives with beta-glycosidic linka ...
DOI:
10.1016/j.carres.2022.108554

2. Aqueous transfer of colloidal metal oxide nanocrystals via base-driven ligand exchange

Author:
Vikram S. Lakhanpal; Benjamin Z. Zydlewski; Xing Yee Gan; Hugo Celio; Huei-Ru “Molly” Jhong; Charles K. Ofosu; Delia J. Milliron
Source:
Chemical communications 2022 v.58 no.68 pp. 9496-9499
ISSN:
1364-548X
Subject:
potassium hydroxide,   etc   ; ligands; nanocrystals; oleic acid;     Show all 4 Subjects
Abstract:
... A general method is developed for removal of native nonpolar oleate ligands from colloidal metal oxide nanocrystals of varying morphologies and compositions. Ligand stripping occurs by phase transfer into potassium hydroxide solution, yielding stable aqueous dispersions with little nanocrystal aggregation and without significant changes to the nanomaterials’ physical or chemical properties. This m ...
DOI:
10.1039/d2cc02416k

3. One-step hydroxylation of aryl and heteroaryl fluorides using mechanochemistry

Author:
Eduardo Rodrigo; Rainer Wiechert; Magnus W. Walter; Wilfried Braje; Hervé Geneste
Source:
Green chemistry 2022 v.24 no.4 pp. 1469-1473
ISSN:
1463-9270
Subject:
potassium hydroxide,   etc   ; green chemistry; heterocyclic compounds; hydroxylation; mechanochemistry; solvents;     Show all 6 Subjects
Abstract:
... Simple use of KOH allows the direct F to OH exchange of aromatic and heteroaromatic substrates under mechanochemical conditions. The reaction is performed in the absence of solvent with potassium hydroxide as OH source. As a result, this approach is both more atom economical and environmentally friendly than previously described methods for this transformation. ...
DOI:
10.1039/d1gc04361g

4. Highly Selective and Multigram Hydrogenation of Citral into Citronellal by Palladium Nanoparticles in Water

Author:
Marion Duval; Gilles Sagorin; Audrey Denicourt-Nowicki; Alain Roucoux
Source:
ACS sustainable chemistry & engineering 2022 v.10 no.17 pp. 5500-5506
ISSN:
2168-0485
Subject:
potassium hydroxide,   etc   ; citral; citronellal; coproducts; green chemistry; hydrogenation; palladium; perfumes;     Show all 8 Subjects
Abstract:
... The synthesis of citronellal, an added-value chemical for perfumery, was performed through selective and green hydrogenation of citral into citronellal in water. Aqueous suspensions of spherical ammonium-capped palladium nanoparticles with sizes around 3 nm selectively reduced the conjugated carbon–carbon double bond. An excellent selectivity up to 97% in citronellal was achieved at complete conve ...
DOI:
10.1021/acssuschemeng.2c00050

5. Epoxidised Natural Rubber Filled Spent Coffee Ground Green Biocomposites

Author:
Gunasunderi Raju; Mohammad Khalid Siddiqui; Noor Hana Hanif Abu Bakar; Hazizan Md Akil
Source:
Journal of polymers and the environment 2022 v.30 no.4 pp. 1415-1422
ISSN:
1566-2543
Subject:
potassium hydroxide,   etc   ; biocomposites; environment; rubber; tensile strength; thermal analysis; thermal stability;     Show all 7 Subjects
Abstract:
... This study investigates the influence of spent coffee (SC), and potassium hydroxide (KOH) modified spent coffee (ACT-SC) as fillers on the mechanical and thermal properties of epoxidized natural rubber (ENR) biocomposites. The results show the tensile strength, 100% modulus, elongation at break of the ACT-SC rubber biocomposites were enhanced, which was further confirmed by changes in the diffract ...
DOI:
10.1007/s10924-021-02280-6

6. Development of a sample preparation procedure for Sr isotope analysis of Portland cements

Author:
Anera Kazlagić; Francesco F. Russo; Jochen Vogl; Patrick Sturm; Dietmar Stephan; Gregor J. G. Gluth
Source:
Analytical and bioanalytical chemistry 2022 v.414 no.15 pp. 4379-4389
ISSN:
1618-2642
Subject:
potassium hydroxide,   etc   ; analytical chemistry; cement; hydrochloric acid; isotope labeling; nitric acid; sucrose;     Show all 7 Subjects
Abstract:
... The ⁸⁷Sr/⁸⁶Sr isotope ratio can, in principle, be used for provenancing of cement. However, while commercial cements consist of multiple components, no detailed investigation into their individual ⁸⁷Sr/⁸⁶Sr isotope ratios or their influence on the integral ⁸⁷Sr/⁸⁶Sr isotope ratio of the resulting cement was conducted previously. Therefore, the present study aimed at determining and comparing the c ...
DOI:
10.1007/s00216-021-03821-7

7. Determination of Mancozeb and Maneb using flow injection chemiluminescence detection

Author:
Muhammad Asghar; Mohammad Yaqoob; Nusrat Munawar; Abdul Nabi
Source:
International journal of environmental analytical chemistry 2022 v.102 no.11 pp. 2586-2606
ISSN:
1029-0397
Subject:
potassium hydroxide,   etc   ; analytical chemistry; chemiluminescence; mancozeb; maneb; solid phase extraction; ultraviolet-visible spectroscopy;     Show all 7 Subjects
Abstract:
... A rapid flow injection chemiluminescence method is developed to determine mancozeb and maneb fungicides in natural water samples in the range 0.0025–0.25 ppm (R² = 0.9996, n = 6) and 0.01–0.75 ppm (R² = 0.9994, n = 6) with limit of detections of 0.001 and 0.005 ppm (S/N = 3), relative standard deviations of 1.75% and 1.8% and 200 h–¹injection throughputs, respectively. The method is based on diper ...
DOI:
10.1080/03067319.2020.1758078

8. Hierarchically Hybrid Porous Co₃O₄@NiMoO₄/CoMoO₄ Heterostructures for High-Performance Electrochemical Energy Storage

Author:
Yan Wang; Siming Yu; Ce-yu Deng; Hua-liang Wei; Jian-hao Zhou; Ze-Xiang Chen; Huan Yang; Ming-Jin Liu; Bing-Ni Gu; Chia-Chen Chung; Hui-fang Lv; Zhi-yu Zhou; Yu-Lun Chueh
Source:
ACS applied materials & interfaces 2022 v.14 no.6 pp. 8282-8296
ISSN:
1944-8252
Subject:
potassium hydroxide,   etc   ; adsorption; electrochemical capacitors; electrochemistry; electrodes; electron transfer; energy; energy density; nanowires; viability;     Show all 10 Subjects
Abstract:
... Hierarchical, ultrathin, and porous NiMoO₄@CoMoO₄ on Co₃O₄ hollow bones were successfully designed and synthesized by a hydrothermal route from the Co-precursor, followed by a KOH (potassium hydroxide) activation process. The hydrothermally synthesized Co₃O₄ nanowires act as the scaffold for anchoring the NiMoO₄@CoMoO₄ units but also show more compatibility with NiMoO₄, leading to high conductivit ...
DOI:
10.1021/acsami.1c23129

9. Efficient monoacylglycerol synthesis by carboxylesterase EstGtA2 from Geobacillus thermodenitrificans in a solvent-free two-phase system

Author:
Tatsuya Osamura; Kyoshiro Nonaka; Fumikazu Takahashi; Mitsuyoshi Okuda; Hiroshi Hagihara; Yasushi Takimura
Source:
Journal of bioscience and bioengineering 2022 v.134 no.2 pp. 89-94
ISSN:
1389-1723
Subject:
potassium hydroxide,   etc   ; Bacillus thermodenitrificans; acylglycerol lipase; carboxylesterase; esterification; fatty acids; glycerol; neutralization; pH; thermal stability;     Show all 10 Subjects
Abstract:
... The present study investigated high-yield monoacylglycerol (MAG) synthesis by bacterial lipolytic enzymes in a solvent-free two-phase system. Esterification by monoacylglycerol lipase from Bacillus sp. H-257 (H257) required a high glycerol/fatty acid molar ratio for efficient MAG synthesis. Screening of H257 homologues revealed that carboxylesterase derived from Geobacillus thermodenitrificans, Es ...
DOI:
10.1016/j.jbiosc.2022.05.004

10. Production of cellulose nanofibrils via an eco-friendly approach

Author:
Chunping Wang; Langman Luo; Weifeng Zhang; Shao Geng; An Wang; Zhen Fang; Yangbing Wen
Source:
Cellulose 2022 v.29 no.16 pp. 8623-8636
ISSN:
0969-0239
Subject:
potassium hydroxide,   etc   ; cellulose; cellulose nanofibers; crystal structure; mechanical methods; mechanical stress; polymerization; tensile strength; urea; viscosity;     Show all 10 Subjects
Abstract:
... Swelling of cellulose fibers facilitates the fibrillation process by mechanical treatment. In this study, potassium hydroxide (KOH)-urea (KUr) solution was investigated to swell fibers for the production of cellulose filaments. The properties of cellulose fibers following KUr swelling process were evaluated by determining the viscosity, morphology, degree of polymerization, crystallinity, and chem ...
DOI:
10.1007/s10570-022-04798-x

11. Strong Bacterial Cellulose-Based Films with Natural Laminar Alignment for Highly Sensitive Humidity Sensors

Author:
Hongliang Ma; Xia Li; Jiang Lou; Yujie Gu; Yang Zhang; Yifei Jiang; Heli Cheng; Wenjia Han
Source:
ACS applied materials & interfaces 2022 v.14 no.2 pp. 3165-3175
ISSN:
1944-8252
Subject:
potassium hydroxide,   etc   ; biodegradability; cellulose; electrolytes; electronics; evaporation; human health; hydrophilicity; industry; nanopores; permeability; relative humidity; solvents;     Show all 13 Subjects
Abstract:
... Humidity sensors have been widely used for humidity monitoring in industry and agriculture fields. However, the rigid structure, nondegradability, and large dimension of traditional humidity sensors significantly restrict their applications in wearable fields. In this study, a flexible, strong, and eco-friendly bacterial cellulose-based humidity sensor (BPS) was fabricated using a two-step method, ...
DOI:
10.1021/acsami.1c20163

12. High Graphitic Carbon Derived from Coconut Coir Waste by Promoting Potassium Hydroxide in the Catalytic Graphitization Process for Lithium-Ion Battery Anodes

Author:
Fredina Destyorini; Windi Cahya Amalia; Yuyun Irmawati; Andri Hardiansyah; Slamet Priyono; Fauzan Aulia; Haryo S. Oktaviano; Yu-I Hsu; Rike Yudianti; Hiroshi Uyama
Source:
Energy & fuels 2022 v.36 no.10 pp. 5444-5455
ISSN:
1520-5029
Subject:
potassium hydroxide,   etc   ; anodes; catalysts; coconuts; coir; electrochemistry; energy; graphene; heat; lithium batteries; surface area; synergism; wastes;     Show all 13 Subjects
Abstract:
... Graphite is a critical material for lithium-ion battery (LIB) anodes. However, its fabrication using a simple route and sustainable carbon sources still remains a great challenge. In this current work, we fabricate high graphitic carbon from coconut coir waste by combining potassium hydroxide (KOH) and a Ni-based catalyst in a one-pot graphitization process. The graphitic carbon (1200-ANi-KOH) sho ...
DOI:
10.1021/acs.energyfuels.2c00632

13. Effect of chemical dechorionation on silkworm embryo viability

Author:
David Urbán-Duarte; Shuichiro Tomita; Hiroki Sakai; Hideki Sezutsu; José Fernando De La Torre-Sánchez; Yooichi Kainoh; Seiichi Furukawa; Keiro Uchino
Source:
Journal of insect physiology 2022 v.137 pp. 104327
ISSN:
0022-1910
Subject:
potassium hydroxide,   etc   ; chorion; cryopreservation; eggs; embryogenesis; insect physiology; instars; larvae; nylon; silkworms; sodium hypochlorite; strength (mechanics); viability;     Show all 13 Subjects
Abstract:
... The chorion covering/protecting insect egg, which has some effective functions such as providing mechanical strength, protecting eggs from external environments, and keeping moisture adjustment, is one of the principal barriers to manipulation, cryopreservation, and study of insect embryos. Here we evaluated the silkworm embryo viability after dechorionation using chemical reagents. We have develo ...
DOI:
10.1016/j.jinsphys.2021.104327

14. Activated carbon production from coconut leaflets through chemical activation: Process optimization using Taguchi approach

Author:
D. Praveen Kumar; D. Ramesh; P. Subramanian; S. Karthikeyan; A. Surendrakumar
Source:
Bioresource technology reports 2022 v.19 pp. 101155
ISSN:
2589-014X
Subject:
potassium hydroxide,   etc   ; activated carbon; coconuts; experimental design; iodine value; phosphoric acid; surface area; technology; temperature; zinc chloride;     Show all 10 Subjects
Abstract:
... The present work investigated the feasibility of coconut leaflets for synthesizing activated carbon through chemical activation using phosphoric acid (H₃PO₄), zinc chloride (ZnCl₂), and potassium hydroxide (KOH). The result showed that the optimum production route with higher iodine number and surface area was achieved through one step for H₃PO₄ and ZnCl₂ whereas two step for KOH activation. The c ...
DOI:
10.1016/j.biteb.2022.101155

15. Decontamination of Aflatoxins in Edible Oils: A Comprehensive Review

Author:
Fardin Javanmardi; Diako Khodaei; Zhaleh Sheidaei; Moein Bashiry; Kooshan Nayebzadeh; Yasser Vasseghian; Amin Mousavi Khaneghah
Source:
Food reviews international 2022 v.38 no.7 pp. 1410-1426
ISSN:
1525-6103
Subject:
potassium hydroxide,   etc   ; aflatoxins; cooking fats and oils; decontamination; electrolyzed water; gamma radiation; ozone; sodium hydroxide; ultraviolet radiation;     Show all 9 Subjects
Abstract:
... The majority of crops can be contaminated by aflatoxins mainly due to the insufficiency of cultivation or storage techniques. Therefore, the possible presence of aflatoxins in edible oil is inevitable which can cause some health problems for consumers. Due to the possible degradation of aflatoxins to the other toxicant compound and its interaction with the food components, it is necessary to study ...
DOI:
10.1080/87559129.2020.1812635

16. Chromatographic analysis of oxidized cello-oligomers generated by lytic polysaccharide monooxygenases using dual electrolytic eluent generation

Author:
Heidi Østby; John-Kristian Jameson; Thales Costa; Vincent G.H. Eijsink; Magnus Ø. Arntzen
Source:
Journal of chromatography 2022 v.1662 pp. 462691
ISSN:
0021-9673
Subject:
potassium hydroxide,   etc   ; anion exchange chromatography; methane; oligosaccharides; oxidation; polysaccharides; potassium; rapid methods; sodium acetate; sodium hydroxide; sulfonates;     Show all 11 Subjects
Abstract:
... Research on oligosaccharides, including the complicated product mixtures generated by lytic polysaccharide monooxygenases (LPMOs), is growing at a rapid pace. LPMOs are gaining major interest, and the ability to efficiently and accurately separate and quantify their native and oxidized products chromatographically is essential in furthering our understanding of these oxidative enzymes. Here we pre ...
DOI:
10.1016/j.chroma.2021.462691

17. Microplastic load in the surface water and Tilapia sparrmanii (Smith, 1840) of the river systems of Okavango Delta, Botswana

Author:
Baatshwana Caroline Ditlhakanyane; Venecio U. Ultra Jr; Mercy Serwalo Mokgosi
Source:
Environmental monitoring and assessment 2022 v.194 no.8 pp. 572
ISSN:
0167-6369
Subject:
potassium hydroxide,   etc   ; fish; freshwater; lifestyle; microplastics; oxidation; pollution; rivers; socioeconomics; stomach; surface water; tourism; wetlands; wildlife; Botswana;     Show all 15 Subjects
Abstract:
... Microplastics are ‘emerging’ contaminants that threatens freshwaters and may have negative impact on the aquatic organisms. However, Botswana has no information on the status of microplastics, including freshwater like the Okavango Delta- the largest, inland wetland hosting wildlife, tourism, and supporting the socio-economic lifestyle of inhabitants. This study assessed the spatial distribution a ...
DOI:
10.1007/s10661-022-10263-w

18. A Lignin-Rich Extract of Giant Reed (Arundo donax L.) as a Possible Tool to Manage Soilborne Pathogens in Horticulture: A Preliminary Study on a Model Pathosystem

Author:
Stefania Galletti; Stefano Cianchetta; Hillary Righini; Roberta Roberti
Source:
Horticulturae 2022 v.8 no.7 pp. -
ISSN:
2311-7524
Subject:
potassium hydroxide,   etc   ; Arundo donax; adsorption; bioenergy; biomass production; grasses; horticulture; lignocellulose; neutralization; peat; plant protection; plantlets; sand; zucchini;     Show all 14 Subjects
Abstract:
... Finding new sustainable tools for crop protection in horticulture has become mandatory. Giant reed (Arundo donax L.) is a tall, perennial, widely diffuse lignocellulosic grass, mainly proposed for bioenergy production due to the fact of its high biomass yield and low agronomic requirements. Some studies have already highlighted antimicrobial and antifungal properties of giant reed-derived compound ...
DOI:
10.3390/horticulturae8070589

19. A Sustainable Approach for Preparing Porous Carbon Spheres Derived from Kraft Lignin and Sodium Hydroxide as Highly Packed Thin Film Electrode Materials

Author:
Yasuhiko Kitamoto; Kiet Le Anh Cao; Phong Hoai Le; Oktaviardi Bityasmawan Abdillah; Ferry Iskandar; Takashi Ogi
Source:
Langmuir 2022 v.38 no.11 pp. 3540-3552
ISSN:
1520-5827
Subject:
potassium hydroxide,   etc   ; activated carbon; capacitance; carbon electrodes; carbonization; electrochemical capacitors; electrochemistry; energy; films (materials); lignin; motivation; sodium hydroxide; surface area;     Show all 13 Subjects
Abstract:
... A green synthetic strategy to design biomass-derived porous carbon electrode materials with precisely tailored structure and morphology has always been a challenging goal because these materials can fulfill the demands of next-generation supercapacitors and other electrochemical devices. Potassium hydroxide (KOH) is extensively utilized as an activator since it can produce porous carbon with high ...
DOI:
10.1021/acs.langmuir.1c03489

20. Catalytic activity of platinized titanium and titanium coated with ruthenium oxide in the processes of electrooxidation of ethyl alcohol in alkaline media

Author:
Klara Tarantseva; Natalia Politaeva; Konstantin Tarantsev; Mikhail Yackhkind; Ajay Kumar Mishra
Source:
Journal of chemical technology and biotechnology 2022 v.97 no.1 pp. 101-110
ISSN:
0268-2575
Subject:
potassium hydroxide,   etc   ; acetaldehyde; acetic acid; biotechnology; catalytic activity; corrosion; electrodes; electrolytes; ethanol; gas chromatography; oxidation; phosphates; platinum; ruthenium; titanium; voltammetry;     Show all 16 Subjects
Abstract:
... BACKGROUND: This study investigates the catalytic activity of platinized titanium and titanium coated with ruthenium oxide in the processes of electrooxidation of ethyl alcohol in alkaline phosphate electrolyte and potassium hydroxide electrolyte in non‐flowing membraneless fuel cells proposed by the authors. In these systems, an interface between the phases formed, which played the role of a memb ...
DOI:
10.1002/jctb.6915