A variety of olefins is shown to be cleaved oxidatively to the corresponding acids with oxone as the reagent. The simple methodology that works well for a range of alkenes, i.e., styrenes, nitrostyrenes, stilbenes, cinnamic acids, chalcones, etc., involves heating of the reactant with oxone in a...

Oxidation of substituted toluenes by molecular oxygen at one atmosphere to the corresponding substituted benzoic acids in non-acidic solvents was investigated. Satisfactory oxidation of halo-, methoxy-, and cyano-toluenes were achieved using Co(C18H35O2)2/NH4Br or Co(OAc)2/NaBr/AcOH as catalysts...

Dipeptidyl Peptidase-IV (DPP-4) is a validated therapeutic target for type 2 diabetes. Aiming to interact with both residues Try629 and Lys554 in S2′ site, a series of novel uracil derivatives 1a–l and 2a–i incorporating benzoic acid moieties at the N3 position were designed and evaluated for...

The potassium vapor released during the combustion of biomass are known to result in serious ash deposition, fouling and corrosion issues of biomass furnaces. To develop potassium control technologies to mitigate these issues and achieve clean utilization of biomass fuel, a better understanding ...

A conductometric sensor for potassium ions in solution is presented. Interdigitated, planar gold electrodes were coated with a potassium-selective polymer membrane composed of a poly(vinyl chloride) matrix with about 65 wt% of plasticiser and 2–5 wt% of a potassium-selective ionophore. The impe...

Reduced graphene oxide incorporated potassium-doped zinc oxide (KZO:rGO) composite thin films were synthesized on glass substrates by spin coating technique. X-ray diffraction studies showed that lattice parameters of the hexagonal wurtzite structured potassium doped zinc oxide (KZO) thin films ...

A study on scrubbing of superheated steam containing silica impurities is performed using an aqueous potassium carbonate solution as a potential application in mitigation of superheated geothermal steam. An experimental setup aimed at testing a silica particle scrubbing technique was built. The ...

A novel potassium complex, [K2L2(H2O)MeOH]n (1), was prepared by reacting KOH and a substituted tetrazolyl ligand LH (LH = 1-[5-(2-hydroxyphenyl)-2H-tetrazol-2-yl]-2-methyl-2-propanol). The prepared complex was characterized by infrared spectroscopy and mass analysis and its solid-state structur...

Torrefaction is a pre-treatment process which can improve the properties of biomass, such as improving grindability, increasing heating value, and reducing the hygroscopic nature. Potassium is a well-known alkali catalyst in the thermal reactions of biomass. The influence of potassium on the dev...

Amine oxides are an alternative, non-ionic class of gas hydrate anti-agglomerant (AA) surfactants that are potentially more environmentally-friendly than cationic surfactant AAs. These classes of AAs work by interacting with hydrate crystal surfaces. Recently, we reported on the clathrate hydrat...

A series of substituted 1-cyclopropyl-6-fluoro-1,4-dihydro-5-methyl-4-oxo-3-quinoline carboxylic acids was synthesized and tested for their in vitro and in vivo antibacterial activity. The introduction of a methyl group at the 5-position of quinoline nucleus enhanced characteristically the antib...

A series of new polyimides (PIs) containing di-tert-butyl side groups were synthesized via the polycondensation of 4-(4-amino-2-chlorophenyl)-1-(4-aminophenoxy)-2,6-di-tert-butylbenzene (3) with various aromatic tetracarboxylic dianhydrides. The introduction of the asymmetric di-tert-butyl group...

Guanine, having lower one-electron oxidation potential than other nucleobases, is of relevance to oxidative degradation of nucleic acids in mutagenesis, carcinogenesis, and aging. Here we compare oxidation potentials of guanine (G), guanosine (Guo), deoxyguanosine (dGuo), guanosine -5′- monopho...

There is a pressing need to develop Janus-like magnetic molecularly imprinted polymers (J-SNs-MMIPs) nanoplatforms that integrate recognition elements and fast separation for specific adsorption and separation of 2′-deoxyadenosine (dA). In this work, the Janus silica nanosheet (J-SNs) with a hy...

2′-Deoxyguanosine-5′-monophosphate disodium (5′-dGMPNa2) salt reacts with divalent platinum, magnesium and copper to give compounds of the type Pt(5′-dGMP)nCl2·xH2O, cis and trans-[Pt(NH3)2(5′-dGMP)2]Cl2, Mg(5′-dGMP)·xH2O and Cu(5′-dGMP)·xH2O, where n = 1, 2, 3 and x = 2−6.Due to the d...

The Wulong deposit is the largest quartz vein-type gold deposit in the eastern Liaoning Province of China. The gold ore bodies are hosted by Mesozoic biotite-granites. The mineralization occurs as veins with lenticular shapes. Laser-ablation-ICP–MS zircon U–Pb dating was used to date the bioti...

A novel nitrogen/argon (N2/Ar) radio frequency (RF) plasma functionalized graphene nanosheet/graphene nanoribbon (GS/GNR) hybrid material (N2/Ar/GS/GNR) was developed for simultaneous determination of ascorbic acid (AA), dopamine (DA) and uric acid (UA). Various nitrogen mites introduced into GS...

Hydrothermal fluid activity associated with geological processes can now be dated by 40Ar/39Ar progressive crushing of minerals thanks to recent advances in high precision mass spectrometry. However, methods of data analysis and interpretation for these high-resolution measurements still need to...

BackgroundPlasma androgen receptor (AR) copy number status has been identified as a potential biomarker of response in patients with metastatic castration-resistant prostate cancer (mCRPC) receiving docetaxel or the AR-targeted therapies abiraterone or enzalutamide. However, the relevance of pla...

We report U-Pb, 87Rb-87Sr, 40Ar-39Ar, and 238U/235U isotopic data for paired ungrouped achondrites NWA 6704 and NWA 6693 that were derived from a highly oxidised parent body with broadly chondritic composition (Warren et al., 2013; Hibiya et al., 2019). Pb-isotopic ages derived from isochrons fo...