The paper discusses the potential of several Yb-doped scheelite-like double tungstate crystals for sunlight down-conversion. Four hosts NaY(WO4)2, NaY1/2Gd1/2(WO4)2, NaY2/3Gd1/3(WO4)2, and NaY(Mo1/2W1/2O4)2 with the same 10% at. Yb doping level were comparatively investigated. Besides that, the ...

In this work, the FT-IR and FT-Raman spectra of 1-naphthaleneacetic acid methyl ester (abbreviated as 1-NAAME, C10H7CH2CO2CH3) have been recorded in the region 3600–10 cm−1. The optimum molecular geometry, normal mode wavenumbers, infrared and Raman intensities, Raman scattering activities, cor...

Phenylcarbenes with -X-CH2Ph and -CH2-X-Ph (X = CH2, O, SiMe2) groups in the ortho position were generated thermally and photolytically from diazo or tosylhydrazone precursors. Stereorandom insertion reactions with β-C-H bonds were observed, pointing to a triplet abstraction-recombination mecha...

Two series of σ1 ligands with a spiro[[2]benzopyran-1,3′-pyrrolidine] (3) and a spiro[[2]benzofuran-1,3′-pyrrolidine] (4) framework were synthesized and pharmacologically evaluated. Several reaction steps were considerably improved by microwave irradiation. The σ1 affinity of the spirocyclic...

In order to comprehensively elucidate the chemical biosynthesis process of the beige-scape Gastrodia elata Blume (Wutianma) as a traditional herbal medicines, the untargeted analysis–based UHPLC-PDA-ESI-Q-TOF-MS reveals the metabolites ranging from the skeletons to novel dimers of citric acids ...

In recent years, the hydroxyalkylphenols p-hydroxybenzyl alcohol and tyrosol, and the compound phloretin and its derivate phloridzin have been described as inhibitors of the enzyme tyrosinase. When the monophenolase and the diphenolase activities of tyrosinase on its physiological substrates l-d...

The new derivative 1-hexanoyl-3-(4-p-tolylethynyl-phenyl)-thiourea (APHX) was synthesised by the addition reaction between 4[4-aminophenyl] ethynyltoluene and hexanoyl isothiocyanate in acetone. The acetylide group was incorporated by using Sonogashira cross-coupling reaction allowing for the pr...

The conjugated 3,3′,5,5′-tetra(p-X-phenylethynyl)biphenyl derivatives were efficiently obtained by homocoupling of 1-bromo-3,5-di(p-X-phenylethynyl)benzene mediated by zero-valent nickel complexes.The 1-bromo-3,5-di(p-X-phenylethynyl)benzene was previously prepared by heterocoupling between 1-...

ZusammenfassungDie Darstellung von exo- und endo-Bicyclo[4.2.1]nonen-(2)-ol-(4) (3) und (4) sowie von exo-und endo-Bicyclo[4.2.1]nonanol-(3) und (2) aus 3,3-Dihalotricyclo[4.2.1.02,4]nonyl-Derivaten wird beschrieben. Über die Konfiguration der Allylalkohole 3 und 4 wird die Konfiguration der ge...

This paper describes the synthesis and liquid-crystalline properties of the homologous series of 4-heptyloxybenzylidene-4′-alkyloxyanilines (7-n). Six of them are presented for the first time. Based on the polarization microscopy (POM and TOA methods) and the calorimetric (DSC) measurements fol...

UV filters have been detected in surface water, wastewater and fish, and some of them are estrogenic in fish. At present, little is known about their additional hormonal activities in different hormonal receptor systems despite their increasing use and environmental persistence. Besides estrogen...

Ethyl-4-aminobenzoate (Et-PABA) is currently used as a substitute for 4-aminobenzoate (PABA) in sunscreens and anesthetic ointments. Despite its widespread use and hydrophilicity, Et-PABA has never been found in environmental waters. This study, probed the occurrence of Et-PABA in both seawater ...

The reactions of 4-methyl-1,2,4-triazolinedione with allylic ethers and sulfides have been examined. The different responses of the regiochemistry in the two reaction series to changes in the electronic character of the substituents is attributed to the difference in the C-S (1.82 Å) and C-O (1....

A novel series of 6-(4-(4-aminophenylsulfonyl)phenylamino)-5H-benzo[a]phenothiazin-5-one derivatives have been synthesized and examined for their in vitro antibacterial activity against a panel of Gram-positive and Gram-negative bacteria. Among these, N-(4-(4-(5-oxo-5H-benzo[a]phenothiazin-6-yla...

In situ sediment remediation technique is commonly used to control the release of pollutants from sediment. Addition of calcium nitrate to sediment has been applied to control the release of phosphorus from sediments. In this study, laboratory experiments were conducted to investigate the effect...

SummarySolutions of sodium dichromate were administered to Sprague Dawley rats by intra-tracheal instillations over a period of 30 months. Dosage was 0.01, 0.05 or 0.25 mg/kg, five times a week, or 0.05, 0.25 or 1.25 mg/kg once a week. Each group consisted of 40 male and 40 female rats. Groups l...

Chromium(VI) (–100 μg) can be determined spectrophotometrically at 365 nm after its extraction as benzyltributylammonium dichromate into chloroform. The effects of acidity, diverse ions and masking studies are reported.

Great progress has been made in reverse flotation of fine quartz, especially many new reagents were proved their excellent effects. However, the influences of complex flotation system on fine quartz flotation still need to be scrutinized. In this study, alkyl ether amine (Flotigam EDA-C from Cla...

This work was aimed at producing peptides containing calcium and iron-binding capabilities from mung bean protein extract after enzymatic hydrolysis. Mung bean protein hydrolysates were separated by ultrafiltration into eight fractions, and assayed for calcium and iron-binding properties. The

In order to increase the biogas production from sugarcane rind (SCR), microwave coupled Ca(OH)2 (MCC) pretreatment was applied to pretreat the SCR before batched mesophilic anaerobic digestion. The synthetic biogas was injected into the pretreatment effluent to decrease the inhibition on biogas ...