Papillon Lefevre Syndrome

Abstract Papillon Lefèvre syndrome is a rare disease characterized by skin lesions caused by palmar-plantar hyperkeratosis, and severe periodontal destruction involving both the primary and permanent dentitions. It is transmitted as an autosomal recessive condition and consanguinity of parents is evident in about onethird of cases. Pyogenic liver abscess is an increasingly recognized complication. We report a new case of this association and review the current literature.

Extraction of Zn(II) from sulphate media using organophosphine oxides, cyanex-923 and cyanex-925

419-424Extraction of Zn(II) with phosphine oxides cyanex-923 and cyanex-925 from sulphate solution is described. Extraction was found to be quantitative with 0.01M cyanex-923 and 0.03 M cyanex-925 in toluene in the pH range 8.0-10.0. From organic phase of cyanex-923 and cyanex-925, Zn(II) was stripped out with 1.0 M HCl and 1.0 M H2SO4 respectively and determined spectrophotometrically. Effect of various parameters such as reagent concentration, equilibration period, effect of various diluents and diverse ions on the extraction of Zn(II) was also studied. The stoichiometry of the extracted species was determined on the basis of slope analysis method

Extraction and separation studies of manganese(II) with Cyanex 301

1076-1078Liquid-liquid extraction of manganese(II) has been carried out in the presence of ammonium sulphate with Cyanex 301 in toluene. Mn(II) is quantitatively extracted in the pH range 7.0-9.5 in presence of 1.0 M ammonium sulphate with 5× 10-3 M Cyanex 301 in toluene. Mn(II) from the organic phase is stripped with 1.0 M H2SO4. Various parameters like reagent concentration, time, effect of diluents and tolerence limit of diverse ions have also been  studied. Mn(II) has been successfully separated from commonly associated metals like Cu(II), Ni(II) and Fe(III). The method has been employed for determination of Mn(II) in real samples.</span

Solvent extraction separation of Cu(II) and Ni(II) with bis(2,4,4-trimethylpentyl) dithiophosphinic acid (Cyanex 301)

367-370<span style="font-size:11.0pt;line-height: 115%;font-family:Calibri;mso-fareast-font-family:" dejavu="" sans";mso-bidi-font-family:="" mangal;color:#00000a;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="" lang="EN-US">The extraction behaviour of copper(II) and nickel(lI) with bis(2,4,4-trimethyl pentyl)dithiophosphinic acid has been studied at various parameters such as, pH, acidity, reagent concentration, equilibration period, solvent effect and effect of diverse ions. The copper(II) was quantitatively extracted from 0.5 MHCI with 5 x 10-3 M Cyanex 301 and nickel(II) was extracted at pH 8.00 with 5 x 10-3 MCyanex 301. The brownish yellow copper complex absorbed at 440 nm while coloured complex of nickel showed maximum absorption at 340 nm. Both metals were separated from multicomponent mixtures. The proposed method was successfully employed for the determination of copper and nickel in real samples.</span

Extraction and separation studies of Ga(III), In(III) and Tl(III) using the neutral organophosphorous extractant, Cyanex-923

The neutral extractant, Cyanes-923 has been used for the extraction and separation of gallium(III), indium(III) and thallium(III) from acidic solution. These metal ions were found to be quantitatively extracted with Cyanex-923 in toluene in the pH range 4.55.5, 5.06.5 and 1.53.0, respectively, and from the organic phase they can be stripped with 2.0 mol dm-3 HNO3, 3.0 mol dm-3 HNO3 and 3.0 mol dm-3 HCl, respectively. The effect of pH equilibration period, diluents, diverse ions and stripping agents on the extraction of Ga(III), In(III) and Tl(III) has been studied. The stroichiometry of the extracted species of these metal ions was determined on the basis of the slope analysis method. The reaction proceed by solvation and the probable extracted species found were [MCl3. 3Cyanex-923] [where M = Ga(III) or In(III) ] and [HTlCl4. 3Cyanex-923]. Based on these results a sequential procedure for the separation of Ga(III), In(III) and Tl(III) from each other was developed

Liquid-liquid extraction<span style="font-size:12.0pt;font-family:HiddenHorzOCR;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:HiddenHorzOCR;color:#171717"> of Palladium (II) with Cyanex 302 i.e.bis (2,4,4-trimethylpentyl) monothiophosphinic acid </span>

109-111A method<span style="font-size:12.0pt; font-family:HiddenHorzOCR;mso-hansi-font-family:" times="" new="" roman";mso-bidi-font-family:="" hiddenhorzocr;color:#171717"=""> is proposed for the extraction of Pd (II) from 1.0 M HCl medium using Cyanex 302 in toluene. Palladium (II)is determined in the organic phase by direct spectrophotometry at 336nm. Various parameters such as acid concentration, reagent concentration, time and effect of foreign ions were studied. The probable extracted species is determined by the logD - logC plot. The method is simple, rapid and permits separation of  Pd(II) from closely associated metals like Pt(IV),Rh(III) Ru(III), Fe(III) and Ni(II). It has been applied for analysis of Pd (II) in commercial samples. The proposed method is reproducible with a relative standard deviation of ± 1.0%. </span

Liquid-liquid extraction of cobalt(II) and manganese(II) with bis(2,4,4-trimethylpentyl)monothiophosphinic acid (Cyanex 302)

358-362<span style="font-size:11.0pt;line-height: 115%;font-family:Calibri;mso-fareast-font-family:" dejavu="" sans";mso-bidi-font-family:="" mangal;color:#00000a;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="" lang="EN-US">Liquid-liquid extraction of cobalt(II) and manganese(II) were carried out from sulphate solution with Cyanex 302 in toluene as the diluent. Cobalt(II) was quantitatively extracted at pH 7.0-7.5 in the presence of 1.0 M ammonium sulphate with 7.5 x 10-3M Cyanex 302 while the extraction of manganese(II) was quantitatives at pH 8.5-9.5 in the presence of 0.1 M ammonium sulphate with 5 x 10-3M Cyanex 302. Cobalt(II) from the organic phase was stripped with 1.0 M hydrochloric acid while manganese(II)was stripped with 1.0 M sulphuric acid. Both metals were separated from complex mixtures of several metals. These methods were extended for the determination of cobalt and manganese in real samples.</span

Calixarene hexaacetato derivative for solvent extraction of chromium (III)

1079-1082Trace concentrations of chromium(III) have been quantitatively extracted with 0.0001  M hexaacetato calix(6)arene in toluene at pH 6.5. Chromium(III) was stripped from the organic phase with 4M hydrochloric acid and determined spectrophotometrically at 520 nm as its complex with xylenol orange. Various parameters influencing the extraction such as <i style="mso-bidi-font-style: normal">pH, reagent concent ration, nature or diluents and stripping agents and effect of diverse ions have been examined. The novelty or the proposed method is that chromium in different oxidation states can be separated from each other, apart from its separation from iron(III), manganese(II), cobalt (II) and molybdenum(VI). The method has been extended to analysis or chromium(III) in real samples such as stainless steel.</span

Solvent extraction separation of bismuth(III) with hexaacetato calix(6)arene

7-10Bismuth(III) was quantitatively extracted from 0.1 M HCl with 1×10-4M of hexaacetato calix(6)arene in toluene. It was stripped with 2 M nitric acid and determined from the aqueous phase spectrophotometrically at 470 nm as its complex with thiourea. The various parameters such as pH, reagent concentration, kind of diluents, stripping agents, effect of diverse ions were studied to ascertain optimum conditions for the quantitative extraction of bismuth . Bismuth was separated from thorium(IV), iron(III), manganese(II), chromium(III). lead(II), palladium(II) and thallium(III) in multicomponent mixtures. The method was extended for the analysis of bismuth in real samples