Humans could be exposed to ingredients in personal care products (PCPs) via ingestion of water originated from contaminated water source, yet little attention has been focused on the distribution of benzophenones, parabens and triclosan in the Yangtze River water from China so far. Benzophenones...

The objective of this research was to explore the fundamental reactions between chlorine/chloramine and 2-hydroxyl-4-methoxyl benzophenone (BP3)/2-hydroxyl-4-methoxyl benzophenone-sulfonic acid (BP4), which were the most common reactions in benzophenone-type UV filters during drinking water trea...

Benzophenone-3 is used in a variety of cosmetic products as a sunscreen, and has shown weak estrogenic and antiandrogenic activity in animal and in vitro studies. Few studies have evaluated whether benzophenone-3 is associated with reproductive outcomes among women. We studied 304 women undergoi...

Adsolubilization of benzophenone into Zn3Al-layered double hydroxide intercalated with dodecylsulfate (DDS) was explored using simulations, based on density functional theory (DFT), in order to gain insight of the interactions behind this chemical process. This intercalation compound was already...

In thiswork,Cellulose acetate/Zinc oxide-Zeolite composite membranes were successfully synthesized via a simple DIPS method for the removal of benzophenone- 3 from water.The influence of the different concentrations of cellulose acetate and Zeolites-Zinc Oxide Nano composite particles were prepa...

The pinacol coupling is one of the most significant methods to synthesize vic-diols. The combination of samarium diiodide (SmI2) and samarium metal successfully induces the selective pinacol couplings of not only aromatic aldehydes and ketones but also aliphatic ones in the presence of trimethyl...

Novel nonlinear optical polymer based on poly(aryl ether ketone) was designed and prepared. Such kind of materials showed excellent water solubility and thermal properties, its onset decomposition temperature can reach 314 °C; glass transition temperature can reach 170 °C. Though the nonlinear...

Publisher SummaryMany ketones are known and many are of great importance in industry and in biology. Ketones are classified on the basis of their substituents. This chapter introduces various derivatives of ketones such as methoxime derivative. This derivative is useful for determining the prese...

A mixture of hypophosphorous acid (H3PO2) and iodine in acetic acid reduces a variety of substituted benzhydrols to the corresponding methylene derivatives in very high yields. The active reducing agent is hydrogen iodide generated by reaction between iodine and hypophosphorous acid.

Photo-degradation studies of polystyrene (as model) and coating resins were made with three different photo-fragmenting initiators: 2,2-dimethoxy-2-phenylacetophenone, 1-[4-(2-propyl)-phenyl]-2-hydroxy-2-methyl-propanone-1 and 1-benzoyl-1-hydroxy-cyclohexane. Addition of the initiators to a benz...

The use of anisoin as pre-chromatographic reagent for LC analysis of guanidino compounds is proposed. The reagent reacts (5 min at 100 °C) with guanidino function and the resulting adducts can be chromatographed under reversed-phase conditions. A fluorescence detector (λex = 325 nm; λem = 435...

The distribution equilibria of 1-phenyl-1,2-propanedione-2-oxime (PPO) and of the copper(II)-PPO and nickel(II)-PPO complexes in the water-chloroform system have been studied at 25°C. From the graphical treatment of the equilibrium data it has been deduced that PPO dimerizes in the organic phas...

A polystyrene-supported palladium(II) 1-phenyl-1,2-propanedione-2-oxime thiosemi-carbazone (PPDOT) complex is found to be a highly active catalyst for the Sonogashira coupling reactions of aryl halides with terminal alkynes. The reactions can be performed under copper- and solvent-free condition...

In this paper, we report a simple and sensitive on-line solid phase extraction system for the preconcentration and determination of Cu(II) by flame atomic absorption spectrometry (FAAS). This method is based upon the on-line retention of copper at pH 5.0 on a minicolumn packed with chloromethyla...

The analytical properties of 1-phenyl-1,2-propanedione-2-oxime thiosemi-carbazone (PPDOT) are described for the first time. The reagent gives colour reactions with copper(II) and nickel(II) in sodium acetate-acetic acid buffer medium. The copper complex shows maximum absorbance at 465 nm while t...

The new chromogenic reagent 1-phenyl-1,2-propanedione-2-oxime thiosemi-carbazone (PPDOT) was synthesized and utilized to prepare a novel sensing membrane (optode) for determination of Cu(II) by immobilization on triacetylcellulose membrane. PPDOT has an amino group and is covalently immobilized ...

An enzyme which catalyzes the oxidation of xanthoptrerin to leucopterin has been isolated from cream and also from whey. An enzymatic differential spectrophotometric method is given for the estimation of xanthopterin. The enzyme reaction could also be followed fluorometrically. These methods hav...

We have identified the primary endogenous fluorescent substance, which has characteristic excitation/emission maxima at 380/440 nm and 400/460 nm, found in the sera of patients with chronic renal failure (Clin Chem 32: 1276, 1988). Preliminary studies, using thin layer chromatography (with cellu...

1.1. Xanthopterin inhibited proliferation of primary renal proximal tubule cells (RPTC) and LLC-PK1 cells while in a growth phase but when incubated at confluence the cells were relatively insensitive.2.2. The growth of malignant human prostate PC-3 cells was also inhibited by xanthopterin in a ...

Human mammary carcinoma MCF-7 cell line responsiveness to the pteridines xanthopterin and isoxanthopterin was studied using the MTS assay for measurement of cell viability. The pteridines were tested at concentrations ranging from 7.8 to 500 μM singly and in 11 isoxanthopterin:xanthopterin rati...