The suitability of 1-nitroso-2-naphthol as a complexing agent for on-line preconcentration of copper using RP-C18 material in a microcolumn with flow injection coupled with flame atomic absorption spectrometry (FI-FAAS) has been tested. Various parameters affecting complex formation, such as pH,...
A method was developed for the simultaneous determination of seven trace impurities (Cd, Mn, Pb, Zn, Cu, Fe and Ni) in high-purity cobalt oxide by ICP-AES. The matrix effect was eliminated by precipitation with 1-nitroso-2-naphthol. The matrix effect of cobalt on the absorptions of trace impurit...
2,4,6,2 ,4 ,6 -Hexanitrodiphenylamine (dipicrylamine) is covalently bonded to a transparent triacetylcellulose film. Activation and modification of the cellulose support is simple and inexpensive. An acid pretreatment step for improving the hydrophilicity of the membranes is also introduced...
We measured the dependence of electrophoretic mobility of dipalmitoylphosphatidylcholine (DPPC) vesicles on the aqueous concentration of negatively charged ions of pentachlorophenol (PCP), dipicrylamine (DPA), and tetraphenylborate (TPhB). The objective was to determine how the physical state of...
Ion-selective membrane electrodes for determination chlorprothixene hydrochloride are described. The membrane of the electrodes consist of chlorprothixene-dipicrylaminate ion-pair complex as exchanger in nitrobenzene and in poly (vinyl chloride) matrix with 2-nitrophenyloctyl ether as plasticiz...
In our study, effects of fungicides mancozeb and dinocap on C and N mineralization were measured in arable and grassland soil. The soils were treated with these fungicides at the application and 10 times lower doses and then incubated at 20°C for 2 weeks. Carbon mineralization (basal and substr...
Dinocap is the generic name for a mixture of 2,6-dinitro-4-(1-methylheptyl)-phenylcrotonate, 2,4-dinitro-6-(1-methylheptyl)-phenylcrotonate and some other alkyl substituted isomers [1]. The mixture is applied as a non-specific acaricide and contact fungicide, recommended for the control of all ...
Nonylphenol (NP) and Monobutyl phthalate (MBP) are two environmental endocrine disruptors (EEDs) which are widespread occurrence in our life. In present study, our purpose is to analyze style of combined effects of NP and MBP on rat testicular Sertoli cell in vitro using two mathematical models ...
The objective was to determine the effects of estradiol-17β, monobutyl phthalate (MBP) and mono-(2-ethylhexyl) phthalate (MEHP) on testosterone and insulin-like peptide 3 (INSL3) secretions in cultured testicular interstitial cells isolated (enzymatic dispersion) from scrotal and retained teste...
This study describes the development of a sensitive liquid chromatography-electrospray-tandem mass spectrometry method for the simultaneous determination of benzyl butyl phthalate (BBP) and its major metabolites, monobenzyl phthalate (MBzP) and monobutyl phthalate (MBuP), in rat plasma, urine, a...
Time-resolved thermal lensing (TRTL) technique was applied to the determination of reaction heats of intramolecular hydrogen abstraction for excited 2-methylbenzophenone (MBP). Excited MBP abstracts a hydrogen atom from the neighboring methyl group to form cis- and trans-enols, whose lifetimes ...
Sub-picosecond to nanosecond laser photolysis of the title compound (MBP) at room temperature reveals that its lowest excited triplet state probably with the form cis- 3 MBP * , undergoes intramolecular hydrogen atom transfer from the methyl group to the carbonyl oxygen. The lowe...
Pharmaceuticals and personal care products (PPCPs) have attracted increasing concern during the last decade because of their widespread uses and continuous release to the aquatic environment. This work aimed to study the distribution of caffeine (CAF), oxybenzone (MBPh), and triclosan (TCS) when...
The insect repellent N,N‐diethyl‐m‐toluamide (DEET) and sunscreen oxybenzone (OBZ) have been shown to produce synergistic permeation enhancement when applied concurrently in vitro and in vivo. The disposition of both compounds following intravenous administration (2 mg/kg of DEET or OBZ) and ...
Organic UV filters including benzophenone-3 (BP-3) are widely used to protect humans and materials from damage by UV irradiation. Despite the environmental occurrence of BP-3 in the aquatic environment, little is known about its effects and modes of action. In the present study we assess molecul...
Acid-treated montmorillonites belonging to the K series (supplied by Süd-Chemie) were tested as heterogeneous catalysts for the liquid-phase acylation of 1,3-dihydroxybenzene with benzoic acid; this reaction may represent an environmentally friendly alternative to the use of benzyltrichloride a...
Study background: 2,4-Dihydroxybenzophenone (DHBP) is an organic compound used for the synthesis of pharmaceutical agents. The objective of this study was to investigate the influence of biofield energy treatment on the physical, thermal and spectral properties of DHBP. The study was performed i...
Two new polymerizable stabilizers, 4-benzoyl-2-(α-piperidino-2-chlorobenzyl)-3-hydroxyphenyl acrylate (BPBHA) and corresponding methacrylate (BPBHMA), were synthesized and characterized. They were copolymerized with styrene in different molar ratios to obtain new polymeric materials with self-p...
Endocrine disruptors (EDs) affect the function of animal reproductive systems. Recently, 2,2′,4,4′-tetrahydroxybenzophenone (BP2), which is a component of UV protection products, was found to be an ED that interferes with the thyroid hormone (TH) axis. However, BP2 activity in the testis has n...
2,2′,4,4′-tetrahydroxybenzophenone (Uvinul D50), a sunscreen used in cosmetics, has two effects in the melanin biosynthesis pathway. On the one hand, it acts a weak inhibitor of tyrosinase and on the other, it accelerates the conversion of dopachrome to melanin. Uvinul D50 was seen to behave a...
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