In the present work, potential groundwater pollution by methabenzthiazuron (MTBU) and the effect of three different amendments (composted sheep manure, composted pine bark and spent coffee grounds) on its mobility were investigated under laboratory conditions. The efficiency of ZnO and TiO2 susp...
A reversed-phase high-performance liquid chromatographic method has been developed for the determination of methabenzthiazuron in aqueous solutions in the presence of soil constituents. Spiked aqueous soil samples were injected after centrifugation and filtration. Quantitative recoveries were ob...
The degradation of the herbicide MBTU [N-(2-benzothiazolyl)-N,N′-dimethylurea] in water was studied under various conditions. TiO2 photocatalysis using UV lamp more effectively degraded MBTU compared to TiO2 alone and photolysis. Photocatalytic degradation (TiO2/UV) was also carried out in diff...
This study concerns the elimination of methabenzthiazuron (MBTU) photocatalysed by sodium decatungstate salts W10O324-.(DTA) in aqueous solution under irradiation at 365 nm. Ninety percentage of MBTU (10−4 M) is mineralised in the presence of the photocatalyst (2 × 10−4 M) after 7 d under expos...
Publisher SummaryThis chapter provides the basic synthesis paths routes for the manufacture of methabenzthiazuron, with a listing of the main raw materials and intermediates used in the synthesis of methabenzthiazuron. Methabenzthiazuron is commercially known as Tribunil and it belongs to the be...
In the soil, pesticides undergo various abiotic and biotic transformation reactions. The effect of soil constituents can be modelled by several additives. TiO2, clay minerals, humic materials and other photosensitizers have been used in several studies for this purpose. The aim of this study was...
Photocatalytic oxidation of 2-(butylamino)ethanethiol (BAET) was undertaken in aqueous suspension of TiO2 Hombikat UV 100 and Degussa P25 under different initial reaction conditions in order to determine the best parameters for the fastest mineralization of the substrate. BAET is considered to b...
2- Butylamino-2-demethoxy-hypocrellin B (BAHB), is an efficient photodynamic sensitizer, excited singlet-state energies are determined from the overlap of the normalized from absorption and emission spectra to be 176.4 kJ mol−1 (ESCT) and 202.8 kJ mol−1 (ES1), respectively. The quantum yields of...
Mesoporous silica SBA-15 has been functionalized with sulfonic acid to create highly powerful heterogeneous solid acid catalysts (SBA-Pr-SO3H). The catalyst can be easily removed from the reaction mixture by simple filtration, recovered and reused without significant loss of activity. In this re...
Nitrated fatty acids are the product of nitrogen dioxide reaction with unsaturated fatty acids. The discovery of peroxynitrite and peroxidase-induced nitration of biomolecules led to the initial reports of endogenous nitrated fatty acids. These species increase during ischemia/reperfusion, but c...
The preparation and the properties of the elusive tetronic acid are reviewed, including its synthesis, chemical reactivity and reactions.
Reported herein is a novel 4-OTBS benzyl-based protective group for carboxylic acids. This protective group can be removed in the presence of TBAF or TFA with high efficiency, which makes it compatible with base-sensitive or acid-sensitive substrates. With this protective group, a near-infrared ...
The catalytic activities of human red cell carbonic anhydrase (EC 4.2.1.1) isozymes B and C for the hydrolysis of 2-hydroxy-5-nitro-α-toluenesulfonic acid sultone have been compared with their activities towards three other substrates. The substrate specificity (measured as Kcat/Km) for either ...
Different benzylidene derivatives (15a-o and 16a-o) of betulinic acid were designed and synthesized in an effort to develop potent anticancer agents. All the synthesized derivatives along with betulinic acid were evaluated for cytotoxicity against a panel of five different human cancer cell line...
Collagen is composed of three chains, which wind into triple helices. As there are high percentages of acidic and basic residues in natural collagen, mechanisms of how salt bridges could modulate the trimerization have been received much attention. Sixteen pairwise salt bridges were constructed ...
Amyloid-β aggregation inhibitors are expected to be therapeutic or prophylactic agents for Alzheimer's disease. Rosmarinic acid, which is one of the main aggregation inhibitors derived from Lamiaceae, was employed as a lead compound and its 25 derivatives were synthesized. In this study, t...
In this study we have studied the synthesis, characterization and catalytic activity of phosphinocopper(I) complexes [Cu(PPh3)3(NCCH3)][B(O2C6H4-4-R)2] (3a: R = H; 3b: R = Me; 3c: R = NO2) and [Cu(PPh3)3(NCCH3)][B(O2C6H3-3,5-di-tBu)2] (3d) containing weakly coordinating arylspiroborate ligands b...
R- and S-Glycerol mycolates derived from single synthetic α-, keto- and methoxy-mycolic acids are described.
Interaction of dihydropentalene (IV) with trimethylstannyldiethylamide in molar ratios of 1:1 or 1:2 leads to mono- or bis-organotin derivatives of IV, respectively. X-ray analysis of trans(E)-bis(trimethylstannyl)dihydropentalene (Va) has been carried out, R = 3.4%. Molecules of Va are centrosy...
Trimethylstannyl (diphenylphosphino)acetate (1), which is readily accessible from potassium (diphenylphosphino)acetate and trimethylstannyl chloride, may serve as the source of (diphenylphosphino)acetate anion in the preparation of coordination compounds. Thus, the reactions between [M(cod)Cl2] ...
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