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Abstract
Extraction of zinc with 3-methyl-1-phenyl-4-trifluoroacetyl-pyrazolin-5-one /FAP/ into chloroform has been investigated as a function of pH. The extraction is masked with cyanide and citrate ions. The extracted zinc can be quantitatively stripped into appropriate aqueous solutions. The distribution data of other metal ions show that zinc can be separated from a number of elements. Few possible applications of such separations from analytical and radiochemical point of view have been suggested.
Abstract
Extraction of mercury with 3-methyl-1-phenyl-4-trifluoroacetyl-pyrazolin-5-one /FAP/ in chloroform has been described. Maximum extraction /97.3%/ and a distribution coefficient /D/ of 36.5 have been achieved at pH 8. Among the anions tested, thiourea, thiosulphate and cyanide mask the extraction of mercury. Solution of O. 2M KCN was found most suitable stripping agent for mercury. Decontamination data show that mercury can be separated from toxic elements arsenic, cadmium, antimony and thallium; and from other metal ions i. e. Ga/III/, In/III/, Ge/IV/, Sn/II/, Fe/II/, Ir/IV/ and Pt/IV/. A few separations of analytical and radiochemical importance have been discussed.
Abstract
The solvent extraction of europium(III) with di-n-butylphosphoric {HDBP} and di-(2-ethylhexyl)phosphoric {HDEHP} acids in 3-methyl-1-butanol from 0.1 and 1.0M perchlorate medium {Na(H)ClO4} was studied at pH 1–3. It was found that the composition of the species extracted into the organic phase depended on the concentration of perchlorate anion. In 0.1M Na(H)ClO4 solutions, simple chelates Eu(DBP)3 or Eu(DEHP)3 are extracted while mixed ligand complexes Eu(DBP)2ClO4 or Eu(DEHP)2ClO4 are also extracted from 1.0M Na(H)ClO4 solutions. Compared to the extractions from perchlorate solutions, no such change in the extraction mechanism has been observed in chloride solutions containing up to 1.0M Cl–. The extraction of europium(III) with these extractants into toluene from 0.1M perchlorate or chloride media was studied as well. The extraction species found were identical with those reported in the literature, i.e. {Eu[H(DBP)2]3, Eu[H(DEHP)2]3}. The extraction equilibrium constants were calculated for all complexes.
Abstract
The present article describes the synthesis, structural features and thermal studies of heterochelates of the type [M(SB)(benen)(H2O)]·nH2O [where H2SB=(Z)-2-(2,2,2-trifluoro-1-(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)ethylideneamino)benzoic acid, benen=bis(benzylidene)ethylenediamine and M=Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and VO(IV)]. The Schiff base (H2SB) have been characterized on the basis of elemental analysis, IR, 1H and 13C NMR. The heterochelates have been characterized on the basis of elemental analyses, magnetic measurements, solid state conductivity measurements, IR, reflectance spectra, and thermal studies. The FAB mass spectrum of [Co(SB)(benen)(H2O)] has been carried out. The kinetic parameters such as order of reaction (n) and the energy of activation (E a) have been reported using Freeman-Carroll method. The pre-exponential factor (A), the activation entropy (ΔS #), the activation enthalpy (ΔH #) and the free energy of activation (ΔG #) have been calculated.
In field trapping tests conducted in Hungary large numbers of Pyralis costalis F. (Lepidoptera: Pyralidae), a secondary pest, were attracted to traps baited with iso-amyl alcohol (3-methyl-1-butanol) and acetic acid. The same bait attracted lower numbers of P. farinalis L., a well-known stored product pest. In both spp. the capture of the two-component blend was significantly higher than the catch in traps with the single components. In tests conducted in a country mill, the blend of the above two compounds proved to be attractive towards Anagasta kuehniella Zell. and Plodia interpunctella Hbn. (Lepidoptera: Phycitidae), both important pests of stored products worldwide. The majority of captured insects were females. The optimal ratio for attracting A. kuehniella was 1:1 to 1:10 iso-amyl alcohol:acetic acid. The related iso-amyl acetate was inactive. The addition of iso-butyl alcohol (2-methyl-1-propanol) did not influence activity of the iso-amyl alcohol / acetic acid blend. Polyethylene dispensers with 0.2 ml of the blend started to loose activity only after 3 weeks of field exposure. Application possibilities of the newly discovered attractant are discussed.
3-Methyl-1-Phenyl-pyrazolo [4′-3′-4,5] thieno [2,3- d ] pyrimidine-4,6 (5 H ,7 H ) dithione I 205 C: 50.20, H: 3.00, N: 16.65, S: 29.09 C: 50.88, H: 3.05, N: 16
Emodin–phospholipid complex
A potential of herbal drug in the novel drug delivery system
026 . 19. Kumar , A , Dhawan , S , Aggarwal , BB . Emodin (3-methyl-1,6,8-trihydroxy-anthraquinone) inhibits TNF-induced NF-kB activation, IkB degradation, and expression of cell
-methylamino anthraquinone (red), and 4,4′-methylidyne-bis-3-methyl-1-phenyl-2-pyrazolin-5-one (yellow), and some additives which facilitate burning and improve the processing characteristics of the composition [ 4 , 5 ]. Some simple sugars are used as
.46 ± 100.68 cde 1068.34 ± 128.22 ab 839.30 ± 64.92 bcd 3-Methyl-1-butanol 1882.60 ± 94.42 b 1898.97 ± 115.58 b 830.98 ± 119.51 e 1998.22 ± 87.68 b 1513.90 ± 111.21 c 772.97 ± 65.55 e 675.05 ± 51.47 e 2519.55 ± 131.66 a 1129.96 ± 109.67 d 2-Methyl-1-butanol
