Organic chemical

In this study, we investigated some conditions affecting the extraction of total carotenoids from R. mucilaginosa using environmentally friendly chemicals: cell disruption conditions with organic acids combined with ultrasound-assistant method, using ethanol and petroleum ether solvents to replace acetone in the process of extracting total carotenoids to obtain a benign product, easy to apply in food.

8p viling 11-10-2024 2 1   Download

This study aimed to evaluate the effects of chemical and organic fertilizers in different fertilization regimes on vegetative growth, fruit yield, and fruit quality of tomatoes. The experiment was arranged in a randomized complete block design with three replications in the winter season of 2021.

11p vibecca 01-10-2024 2 2   Download

Manufactured dyes are notably troublesome chemical toxins. The industrial wastes of these dyes are exceedingly noxious to aerobic and aquatic life and can cause compounds that show carcinogenic, mutagenic, and neurotoxic effects. In this study, cadmium imidazolate frameworks were synthesized by a solvothermal method from cadmium acetate and 2-methylimidazole in an ethanol/methanol mixture.

7p vikwong 29-09-2024 3 1   Download

The volatile organic compounds (VOCs) sensing layers were studied using ZnO nanomaterials with different morphologies including hierarchical nanostructure (ZnO-H), nanorods (ZnO-NRs), commercial nanoparticles (ZnOCNPs) and wet chemical synthesized nanoparticles (ZnO-HNPs). ZnO hierarchical structure was fabricated by an electrospinning technique followed by hydrothermal process.

6p vikwong 29-09-2024 2 1   Download

This work demonstrates an AlGaN/GaN high electron mobility transistor (HEMT) with Cr/Graphene ohmic contacts constructed without heat treatment. The Cr/Graphene ohmic contact was fabricated using a spray-coated graphene nanoflakes solution and electron-beamevaporated Cr. This method does not require a high-temperature annealing step in conventional Ti/Al/Ni/Au ohmic contact. It is suggested that the Cr/graphene combination acts similarly to a doped n-type semiconductor in contact with AlGaN/GaN heterostructures, enabling carrier transport to the AlGaN layer.

8p xuanphongdacy06 18-09-2024 3 1   Download

The study aims to explore the motivation of organic food consumption among consumers in Hue city. The authors applied means-end chain theory in 77 samples. The results showed health and happiness are drivers for organic food purchase. The organic product attributes as means to achieve consumption goals are “no chemicals”, “food safety”, “better sensory”, “nutritious value”, and “producers/ origin”. Basing on the results, the research figured out some implications for organic food stores to motivate organic food purchase.

18p toduongg 24-08-2024 3 1   Download

This article, we present a thorough and straightforward hydrothermal method towards the production of reduced graphene oxide templated MIL-53(Fe) hybrids RGO@MIL-53(Fe). The structural characteristics of created hybrids were identified by using BET, FESEM, powder X-ray diffraction, and FTIR techniques. Methylene blue (MB) dye (a model water pollutant) was used to evaluate H2O2-assisted photo-catalytic efficiency of RGO@MIL-53(Fe).

9p dianmotminh02 03-05-2024 4 2   Download

A major challenge for outdoor uses of methylammonium lead halide (MAPbX3) solar cells is the poor durability of the perovskite film under humidity. This instability is due to limitations of the dipping or spin coating process in producing MAPbX3 films through a direct reaction between PbI2 and methylammonium iodide (MAI) in an organic solvent. In this study, we devised an eco-friendly and cost-effective method to fabricate MAPbX3 films using an aqueous solution of Pb(NO3)2 and MAI vapour. I

7p dianmotminh02 03-05-2024 9 2   Download

To build trust across many sites (laboratories, regulatory agencies, contract research organizations, chemical producers, and the public), stakeholders will need to agree on validation requirements for particular uses (content in relation to context) as well as how results are to be communicated (data format), and measured (metrics). There is also a need for a global orchestrator, who can exert leadership and inspire voluntary cooperation of diverse organizations to address shared validation goals, to play a key role.

13p thebadguys 15-01-2022 19 2   Download

The characteristics of synthesized nanoparticles depend on the source of the plant extracts because of different combinations and concentrations of organic reducing agents present in the extracts (Mukunthan and Balaji, 2012).

178p spiritedaway36 26-11-2021 11 2   Download

The objectives of the thesis: Isolation and determination of chemical structures of the isolated compounds from the leaves of Excoecaria agallocha L. and Excoecaria cochinchinensis Lour.; studied the cytotoxic, anti-inflammatory, and antimicrobial activities of the isolated compounds to find the bioactive compounds.

27p closefriend09 16-11-2021 29 3   Download

Study on main chemical constituents of two Gymnema species including Gymnema sylvestre and Gymnema latifolium growing in Vietnam and evaluate the inhibitory effect of α-glucosidase and α-amylase enzymes of isolated compounds.

27p closefriend09 16-11-2021 19 4   Download

Aims of the study: The study has applied the view of differentiated teaching in designing and using the system of differentiated exercises in organic chemistry teaching at high schools in order to develop the problem-solving capacity for high school students in several Mekong Delta provinces.

27p tunelove 10-06-2021 12 3   Download

The purpose of this thesis is to study and synthesize BiMO materials (M = V,Ti,Sn) by microwaveassisted chemical method, hydrothermal method, sol-gel method and evaluate their physical properties. The synthesized materials (Bi2Sn2O7 and Bi2Ti2O7) were investigated the photocatalytic activity in the decomposition of RhotaminB (RhB) under visible light.

28p thebadguys 08-06-2021 23 3   Download

In this thesis, we research and fabricate AgNDs, AgNFs, AuNFs structures on silicon by chemical deposition and electrochemical deposition method for the main purpose of using as SERS substrate. To this target, we have studied the morphology, structure and some properties of the nanostructures produced.

26p extraenglish 24-05-2021 26 4   Download

The objectives of the thesis: The objectives of this study are to investigate the main chemical compositions of Euphorbia hirta L. to search for chemical constituents in relation to biological activities, contributing to further studies to create products for application in the aquarculture industry in particular and for life in general.

31p extraenglish 24-05-2021 30 3   Download

Objectives of the dissertation: Research and synthesize and determine the hybrid compound structure containing Quinazoline frame. Research on carcinogenic activity and inhibition of acetylcholinesterase enzyme of synthetic compounds..

26p extraenglish 24-05-2021 21 3   Download

The aim of the thesis: Study on chemical constituents of two Knema species including Knema pachycarpa and Knema saxatilis growing in Vietnam. Evaluate cytotoxic and cetylcholinesterase enzyme inhibitory activitiesof isolates to find out bioactive compounds.

25p extraenglish 24-05-2021 19 4   Download

The aim of the thesis: Study on chemical composition of starfish Acanthaster planci of Vietnam, synthesizing hydroxyl and oxime derivatives from a steroid isolated from this starfish and assessing biological activity of isolated and synthesized compounds.

26p extraenglish 24-05-2021 20 4   Download

Research objectives of the thesis: The thesis was conducted to research and develop a new type of electrode: glass charcoal electrodes modified by flower platinum nano (PtNFs/GC) and to evaluate the properties of fabricated electrodes: electrode structure, morphology, physical and chemical properties.

28p extraenglish 24-05-2021 31 4   Download