N-n-Octylaniline in xylene is used for extractive separation of tellurium(IV) from hydrochloric acid media. Tellurium(IV) is extracted quantitatively with the 3% reagent in xylene from 5.5 to 7.5 M hydrochloric acid. It is stripped from organic phase with 1:1 ammonia and estimated spectrophotome...

The strong sensitizing potencies of the most important primary intermediates of oxidative hair dyes, p-phenylenediamine (PPD) and p-toluylenediamine (PTD, i.e. 2-methyl-PPD) are well established. They are considered as the key sensitizers in hair dye allergic contact dermatitis. While modificati...

The contamination of the water supply with high levels of heavy metals from various human and industrial activities continues to present a major environmental problem. Heavy metals such as hexavalent chromium (Cr(VI)) are of particular concern since they pose serious health and environmental ris...

Determination of persulphate is important in persulphate based advanced oxidation process (AOP). Potassium iodide (KI) based iodometry has been the conventional method for determination of persulphate. Recently, determination of persulphate by decolorization of organic pollutants via cobalt ion ...

A sensitive spectrophotometric method (the N,N-diethyl-p-phenylenediamine (DPD) method) was established for the determination of trace permanganate concentration (0–10 μM) in water. The DPD method was based on the oxidative coloration reaction where permanganate could oxidize DPD to form the r...

A selective fluorometric approach for detection of p-phenylenediamine (PPD) was fabricated using the alizarin–boronic acid adduct with an assistance of micelles. When Alizarin Red S (ARS) reacted with 4-formylphenylboronic acid (4-FPBA) and yielded the boronate ester adduct (ARS/4-FPBA), the fl...

Poly(p-phenylenediamine)/chitosan (PPPDA/Chi) composite was prepared by in situ chemical oxidative polymerization of p-phenylenediamine (PPPDA) into chitosan (Chi) using ammonium persulphate (APS) as an oxidant. PPPDA and PPPDA/Chi composite were characterized by FT-IR spectra and SEM before and...

The sulfonation of poly(p-phenylenediamine) (P(pPD)) polymer was reported and described in this study. The sulfonated P(pPD) polymers (SP(pPD)) with a degree of sulfonation (S/N molar ratio) range of 0.07–0.38 were prepared using two different methods; postsulfonation of P(pPD) polymers with fu...

The immobilization of Mo(VI) on magnetic poly p-phenylenediamine-thiourea-formaldehyde composite polymer (MpPDTF) (through an intermediary adsorption step) increased sorption of As(V) ions: retention capacity increased from 35.15 mg As g−1 for MpPDTF to 99.04 mg As g−1 for MpPDTF immobilized Mo(...

A high-rate, coin cell (CR2023) supercapacitor (SC) with excellent charge storage performances was fabricated using hydrophilic poly(aniline-co-p-phenylenediamine) nanofiber-decorated nitrogen-doped reduced graphene oxide (referred to as P(ANi-co-pPDA)@N-rGO) as a redox electrode material and 25...

A new alkylating agent, 2-(1-methyl-1-nitroethyl)-5-nitrothiazole, bearing a tertiary nitro nucleofuge, reacts with 2-nitropropane anion by SRN1 mechanism leading to the C-alkylation product.

Ozonolyses of the O-methyl oximes of cyclic ketones 5a - c in the presence of 1,4-cyclohexanedione (6) and ozonolyses of the O-methylated dioxime 8 of 1,4-cyclohexanedione in the presence of cycloketones 7a - c afforded the corresponding diozonides 11. Ozonolysis of the O-methyl oxime of acetone...

When a silica gel-supported tungsten halide cluster with an octahedral metal framework, (H3O)2[(W6Cl8)Cl6]·6H2O/SiO2, is treated in a helium stream in the temperature range 250–350 °C, catalytic activity for the Beckmann rearrangement of cyclohexanone oxime develops. Niobium and tantalum clus...

The currently fielded pre-hospital therapeutic regimen for the treatment of organophosphorus (OP) poisoning in the United States (U.S.) is the administration of atropine in combination with an oxime antidote (2-PAM Cl) to reactivate inhibited acetylcholinesterase (AChE). Depending on clinical sy...

Organophosphorus-based (OP) nerve agents represent some of the most toxic substances known to mankind. The current standard of care for exposure has changed very little in the past decades, and relies on a combination of atropine to block receptor activity and oxime-type acetylcholinesterase (AC...

Organophosphates (OP) inhibit acetylcholinesterase (AChE, EC 3.1.1.7), both in peripheral tissues and central nervous system (CNS), causing adverse and sometimes fatal effects due to the accumulation of neurotransmitter acetylcholine (ACh). The currently used therapy, focusing on the reactivatio...

To investigate the potential of N-acetyltaurine (NAcT) in blood as a biomarker for alcohol uptake, a previously published LC–MS/MS method for urine was modified to simultaneously detect NAcT and ethyl glucuronide (EtG). The method was applied in a drinking study and by analyzing 147 forensic ca...

ABSTRACT4-{4-[4-Tetrahydrofuran-3-yloxy)-benzo[d]isoxazol-3-yloxymethyl]-piperidin-1-ylmethyl}-tetrahydropyran-4-ol (PF-4995274, TBPT) is a new agent that is a partial agonist of the human serotonin-4 (5-HT4) receptor and is under investigation for neurological disorders. Metabolism of TBPT was ...

Pentafluorobenzyl ester derivatives were used to identify zinc dialkyldithiophosphates and diaryldithiophosphates anti-wear engine oil additives by GC–electron impact ionization (EI) MS and GC–electron-capture negative ion chemical ionization (ECNCI) MS analysis. GC–EI-MS of the dialkyldithio...

The tribological behaviors of hydrogenated diamond-like carbon (DLC) coatings under varied load conditions lubricated with polyalpha olefin (PAO), molybdenum dithiocarbamate (MoDTC) and zinc dialkyl dithiophosphate (ZDDP) additives were investigated in this paper. Hydrogenated DLC coatings were ...