Chemical synthesis

Xem 1-20 trên 66 kết quả Chemical synthesis

Chemical engineering Doctoral dissertation: Synthesis of catalysts based on Pt/SBA-15 modified with Al and/or B and their applicability on n-heptane hydroisomerization, tetralin hydrogenation and paracetamol detection

The purpose of the thesis is to synthesize the effective catalysts based on Pt/SBA-15 modifed with Al and/or B and their applicability in n-heptane hydroisomerization, tetralin hydrogenation and paracetamol detection.

129p closefriend04 17-10-2021 17 4 Download

Physics Doctoral Thesis Abstract: Synthesis and investigation of photocatalytic properties of BiMO (M = V, Ti, Sn) materials

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 25 3 Download

Summary of Organic Chemistry Doctoral Thesis: Synthesis and evaluation of anti-cancer and anti-Alzheimer activity of hybrid structure containing 4- aminoquinazoline frame

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 22 3 Download
Summary of Chemical doctoral thesis: Synthesis of hydrotalcite bearing benzothiazolylthiosuccinic acid (BTS) modified by silane and applied in solventborne epoxy coating for corrosion protection of carbon steel

Synthesis and structural analysis of hydrotalcite bearing benzothiazolylthiosuccinic acid modified by silane; study on corrosion inhibiting ability for steel of hydrotalcite bearing benzothiazolylthiosuccinic acid modified by silane.

31p capheviahe27 23-02-2021 33 7 Download
Dissertation summary: Study on the isolation, chemical transformation and biological activities of triterpenoids from Centella asiatica (L.) Urban (Apiaceae)

The aims of the dissertation are: Isolation and purification of the main chemical constituents of the plant Centella asiatica (L.) Urban collected from various regions in Vietnam; synthesis of new derivatives of asiatic acid and madecassic acid obtained from C. asiatica.

27p capheviahe27 23-02-2021 34 3 Download
Ultrasound assisted N-bromosuccinimde catalyzed one pot condensation approach for synthesis of Bis(indolyl)methanes from primary alcohols Prakash Chhattisea, b, Kalpana Handorea, Kakasaheb Mohiteb and Vasant Chabukswar a*

A simple, efficient protocol for one pot synthesis of bis(indolyl)methanes from primary alcohols is investigated with N-bromosuccinimde as a catalyst under ultrasound irradiation.

7p tocectocec 26-05-2020 15 0 Download
New strategy for chemically attachment of Amide group on Multi-walled Carbon Nanotubes surfaces: synthesis, characterization and study of DC electrical conductivity

A new method of amidation of Carboxy Multi Walled Carbon Nanotubes (MWCNT-COOH) with diamine monomer such as ethylene diamine (EDA) and O-Phenylenediamine (OPDA) was applied by using a solution blending technique.

10p tocectocec 25-05-2020 20 3 Download
Summary of Chemical Doctoral thesis: Synthesis and characterization of Silica/Polypyrrole Nanocomposite oriented for use in organic corrosion protection coating

The thesis aims to investigate and select suitable conditions for synthesis of Nanocompozit Silica / Polypyrol by In-situ method. Nature and study of corrosion inhibition ability of Silica / Polypyrol carbon steel. Select suitable conditions for synthesis of silica / Polypyrol anionic doped for In-situ method. Corrosion inhibitory ability for Nanocompozit Silica / Polypyrol-Anion Carbon steel for polybutyral coating. Corrosion protection for carbon steel of epoxy coating containing SiO2 / polypyrol-anion composite.

27p xacxuoc4321 09-07-2019 51 4 Download
Summary of Doctoral thesis in Chemistry: Synthesis and characterization of trace elements co-doped Hydroxyapatite on 316L stainless steel application in bone implant

The thesis aims to successfully fabricate NaHAp films doped separately and simultaneously with microelements: sodium, magnesium, strontium, fluorine, copper, silver and zinc on 316L stainless steel substrate to meet the requirement of screw bracing bone. Study on physicochemical characteristics, study on toxicity, antibacterial ability and bio-compatibility of NaHAp films separately and concurrently with trace elements.

27p xacxuoc4321 11-07-2019 22 3 Download
Summary of chemical doctoral thesis: Synthesis of hydrotalcites bearing corrosion inhibitors and fabrication of nanocomposite coatings for corrosion protection of carbon steel

The main contents and objectives of the thesis: Synthesis of hydrotalcite bearing benzothiazolylthiosuccinic acid (BTS) modified by silane and applied in solventborne epoxy coating for corrosion protection of carbon steel.

31p xacxuoc4321 09-07-2019 26 7 Download
Synthesis and characterizations of copper nanoparticles material

Synthesis of the copper nanoparticles colloidal solutions by chemical reduction method with various precursors including copper oxalate, CuCl2, CuSO4, Cu(NO3)2 with hydrazine hydrate reducing agent, NaBH4; solvent glycerin and water, PVA and PVP protection, dispersants and protective agents: including trisodium citrate, ascorbic acid, CTAB.

26p change05 10-06-2016 50 4 Download
The logic of chemical synthesis

General approaches to the analysis of complex synthetic problems, general approaches to the analysis of complex, synthetic problems,... as the main contents of the document "The logic of chemical synthesis". Invite you to consult for additional documents for the academic needs and research.

5p hdaothi8 11-11-2015 75 5 Download
Báo cáo Y học: Control of p70 ribosomal protein S6 kinase and acetyl-CoA carboxylase by AMP-activated protein kinase and protein phosphatases in isolated hepatocytes

Certain amino acids, like glutamine and leucine, induce an anabolic response in liver. They activate p70 ribosomal protein S6 kinase (p70S6K) and acetyl-CoA carboxylase (ACC) involved in protein and fatty acids synthesis, respectively. In contrast, the AMP-activated protein kinase (AMPK), which senses the energy state of the cell and becomes activated under metabolic stress, inactivates by phosphorylation key enzymes in biosynthetic pathways thereby conserving ATP.

9p system191 01-06-2013 50 5 Download
Báo cáo Y học: Synthesis, characterization and application of two nucleoside triphosphate analogues, GTPcNH2 and GTPcF

Guanosine triphosphate nucleotide analogues such as GppNHp (also named GMPPNP) or GTPcS are widely used to stabilize rapidly hydrolyzing protein-nucleotide complexes and to investigate biochemical reaction pathways. Here we describe the chemical synthesis of guanosine 5¢-O-(c-amidotriphosphate) (GTPcNH2) and a new synthesis of guanosine 5¢-O-(c-ﬂuorotriphosphate) (GTPcF). The two nucleotides were characterized using NMR spectroscopy and isothermal titration calorimetry. Chemical shift data on 31P, 19F and 1H NMR resonances are tabulated.

9p system191 01-06-2013 32 5 Download
Báo cáo Y học: Function and cellular localization of farnesoic acid O -methyltransferase (FAMeT) in the shrimp, Metapenaeus ensis

The isoprenoid methyl farnesoate (MF) has been implicated in the regulation of crustacean development and reproduction in conjunction with eyestalk molt inhibiting hormones and ecdysteroids. Farnesoic acid O-methyltransferase (FAMeT) catalyzes the methylation of farnesoic acid (FA) to produce MF in the terminal step of MF synthesis. We have previously cloned and characterized the shrimp FAMeT. In the present study, recombinant FAMeT (rFAMeT) was produced for bioassay and antiserum generation.

9p research12 01-06-2013 41 3 Download
Báo cáo Y học: The mechanism of nitrogen monoxide (NO)-mediated iron mobilization from cells NO intercepts iron before incorporation into ferritin and indirectly mobilizes iron from ferritin in a glutathione-dependent manner

Nitrogen monoxide (NO) is a cytotoxic eﬀector molecule produced by macrophages that results in Fe mobilization from tumour target cells which inhibits DNA synthesis and mitochondrial respiration. It is well known that NO has a high aﬃnity for Fe, and we showed that NO-mediated Fe mobilization is markedly potentiated by glutathione (GSH) generated by the hexose monophosphate shunt [Watts, R.N. & Richardson, D.R. (2001) J. Biol. Chem. 276, 4724–4732]. We hypothesized that GSH completes the coordination shell of an NO–Fe complex that is released from the cell.

10p research12 01-06-2013 49 3 Download
Báo cáo Y học: Synthesis and turn-over of the replicative Cdc6 protein during the HeLa cell cycle

The human replication protein Cdc6p is translocated from its chromatin sites to the cytoplasm during the replication phase (S phase) of the cell cycle. However, the amounts of Cdc6p on chromatin remain high during S phase implying either that displaced Cdc6p can rebind to chromatin, or that Cdc6p is synthesized de novo. We have performed metabolic labeling experiments and determined that [35S]methionine is incorporated into Cdc6p at similar rates during the G1 phase and the S phase of the cell cycle. Newly synthesized Cdc6p associates with chromatin....

7p research12 01-06-2013 41 3 Download
Báo cáo Y học: Steady-state kinetics of the glutaminase reaction of CTP synthase from Lactococcus lactis The role of the allosteric activator GTP in coupling between glutamine hydrolysis and CTP synthesis

CTP synthase catalyzes the reaction glutamine + UTP +ATPfiglutamate + CTP + ADP + Pi.The rate of the reaction is greatly enhanced by the allosteric activator GTP.We have studied the glutaminase half-reactionofCTP synthase from Lactococcus lactisand its response to the allosteric activator GTP and nucleotides that bind to the active site. In contrast to what has been found for the Escherichia colienzyme, GTP activation of the L. lactis enzyme did not result in similarkcat values for the glutami-nase activity and glutamine hydrolysis coupled to CTP synthesis. ...

8p research12 29-04-2013 44 2 Download
Báo cáo Y học: Regulation of a1,3galactosyltransferase expression in pig endothelial cells Implications for xenotransplantation

The disaccharide galactosea1,3galactose (theaGal epitope) is the major xenoantigen responsible for the hyperacute vascular rejection occurring in pig-to-primates organ trans-plantation. The synthesis of theaGal epitope is catalyzed by the enzyme a1,3-galactosyltransferase (a1,3GalT). To be able to control porcinea1,3GalT gene expression speci®c-ally, we have analyzed the upstreamportionof thea1,3GalT gene, and identi®ed the regulatory sequences.

10p research12 29-04-2013 34 2 Download
Báo cáo khoa học: Isolation and enzymatic characterization of lamjapin, the ﬁrst ribosome-inactivating protein from cryptogamic algal plant (Laminaria japonica A)

Lamjapin,anoveltypeIribosome-inactivating protein, has been isolated from kelp (Laminaria japonicaA), a marine alga. This protein has been extensively purified through multiple chromatography columns. With a molecular mass of36 kDa, lamjapin is slightly larger than the other known single-chain ribosome-inactivating proteins from the higher plants. Lamjapin can inhibit protein synthesis in rabbit reticulocyte lysate with an IC50 of 0.69 nM.

7p research12 23-04-2013 32 2 Download