Spontaneous Vesicle Formation of an Industrial Single-Chain Surfactant at Acidic pH and at Room-Temperature

In this study ,the adsorption of an industrial blue dye was investigated by usingpomegranate peel in different size . The effect of the process parameters such as , contact time; adsorbate concentration pH) and (temperature ) are reported . "Nearly 2-3 hr of contact timeare found to be sufficient for the adsorption to reach equilibrium" (Abetter fixation wasobtained at acidic pH (2) and room temperature 25?C.

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Structure and Bonding of Tribromocadmates, ACdBr3, A = NH4, Rb, Cs, CH3NH3, (CH3)2NH2, (CH3)4N], [H2NNH3, and (H2N)3C. An X-ray Diffraction and 79-81Br NQR Study

Zeitschrift für Naturforschung A ◽

10.1515/zna-1991-1212 ◽

1991 ◽

Vol 46 (12) ◽

pp. 1063-1082 ◽

Cited By ~ 5

Author(s):

V. G. Krishnan ◽

Shi-qi Dou ◽

Alarich Weiss

Keyword(s):

Room Temperature ◽

High Temperature Phase ◽

Phase Iii ◽

Line Spectrum ◽

Temperature Phase ◽

X Ray Diffraction ◽

Single Chain ◽

Double Chain ◽

81Br Nqr ◽

A Chain

Abstract The 79-81Br NQR spectra of tribromocadmates with the cations K⊕, NH4⊕, Rb⊕, Cs⊕, CH3NH3⊕, (CH3)2NH2⊕, (CH3)4N⊕, H2NNH3⊕, and C(NH2)3⊕ were studied as functions of temperature from 77 K on up to T>300 K. CsCdBr3 shows a singlet 81Br NQR spectrum over the whole temperature range studied. [CH3NH3]CdBr3, with one 81Br NQR line spectrum at room temperature, experiences a phase transition at 167 K; below this temperature an 18-line spectrum is observed. In [(CH3)4N]CdBr3 (phase II), at 290 K, a singlet 81Br NQR is present as is in the high temperature phase III (TII.1 , = 390 K); the low temperature phase III (TII,m, = 160 K has a triplet 81Br NQR spectrum. KCdBr3 shows an 81Br NQR doublet spectrum, as do RbCdBr3, [H2NNH3]CdBr3, and [C(NH2)3]CdBr3. 81Br NQR triplets are observed for [(CH3)2NH2]CdBr3 and NH4CdBr3. Several crystal structures were determined (at room temperature). [(CH3)4N]CdBr3: P63/m, Z = 2, a - 940 pm, c = 700 pm, disordered cation, single chain Perovskite with face connected [CdBr6]- octahedra (nearly CsNiCl3-type). [(CH3)2NH2]CdBr3: P21/c, Z = 4, a = 898 pm, 6 = 1377 pm, c = 698 pm, ß = 91.2°, face connected [CdBr3-octahedra single chain Perovskite. NH4CdBr3: Pnma, Z = 4, a = 950 pm, b = 417 pm, c= 1557 pm, with a double chain of condensed [CdBr6]-octahedra, NH4CdCl3-type. [N2H5]CdBr3: P2,/c, Z = 4, a = 395 pm, 6 = 1749 pm,c = 997 pm,ß = 94.2°, double chain polyanion similar to NH4CdBr3. [C(NH2)3]CdBr3: C2/c, Z = 4, a = 778 pm, 6 = 1598 pm, c = 746 pm, ß = 110.2°, a single chain Perovskite with a chain of condensed trigonal bipyramids [CdBr5]. Three types of anion chains of CdBr3 have been observed: Single octahedral chains, face connected; double octahedral chains, edge connected; a trigonal-bipyramidal chain, edge connected. The relation between the crystal structure and the Br NQR is discussed

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Room temperature ferroelectricity in one-dimensional single chain molecular magnets [{M(Δ)M(Λ)}(ox)2(phen)2]n (M = Fe and Mn)

Applied Physics Letters ◽

10.1063/1.4977939 ◽

2017 ◽

Vol 110 (10) ◽

pp. 102901 ◽

Cited By ~ 3

Author(s):

Pramod Bhatt ◽

M. D. Mukadam ◽

S. S. Meena ◽

S. K. Mishra ◽

R. Mittal ◽

...

Keyword(s):

Room Temperature ◽

Molecular Magnets ◽

Single Chain ◽

One Dimensional ◽

Fe And Mn

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Dihexadecyl phosphate vesicles: Permeability to cationic components in solar photolysis systems

Australian Journal of Chemistry ◽

10.1071/ch9841147 ◽

1984 ◽

Vol 37 (6) ◽

pp. 1147 ◽

Cited By ~ 5

Author(s):

Y Tricot ◽

DN Furlong ◽

WHF Sasse

Keyword(s):

Aqueous Solution ◽

Room Temperature ◽

Vesicle Formation ◽

Aqueous Environments ◽

Solar Photolysis ◽

Ruthenium Trisbipyridyl ◽

Bilayer Permeability

Aqueous dihexadecyl phosphate (dhp) vesicles prepared at pH 5.6-6.3, and maintained at room temperature, retained ruthenium trisbipyridyl (Ru(bpy)32+) and methylviologen (mv2+) cations when these species were entrapped during vesicle formation or by penetration of the vesicle bilayer from aqueous solution. Increases in pH, or heating to above 35�C, caused leakage of both Ru(bpy)32+ and mv2+ from vesicles. Ry(bpy)32+ penetrated the vesicles at room temperature and pH 6.3 when the external (non-adsorbed) Ru(bpy)32+ concentration was greater 10-4than mol dm-3. Penetration of Ru(bpy)32+ occurred at lower concentrations if the pH was increased and/or the vesicles were heated. The pH and heating conditions required to cause bilayer permeability towards mv2+ were more severe than for Ru(bpy)32+ It is concluded that the bilayer is more able to accommodate Ru(bpy)32+ and to permit its passage between the interior and exterior aqueous environments.

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Vesicle formation of single-chain amphiphilic 4-dodecylbenzene sulfonic acid in water and micelle-to-vesicle transition induced by wet–dry cycles

Soft Matter ◽

10.1039/d0sm02229b ◽

2021 ◽

Author(s):

Meihua Gao ◽

Na Du ◽

Zhiyin Yao ◽

Ying Li ◽

Nan Chen ◽

...

Keyword(s):

Sulfonic Acid ◽

Aggregation Behavior ◽

Vesicle Formation ◽

Single Chain ◽

Multilamellar Vesicle ◽

Dodecylbenzene Sulfonic Acid

Aggregation behavior of DBSA, in water was investigated, showing a concentration-driven micelle-to-vesicle transition. Interestingly, wet–dry cycles can induce micelle-to-vesicle transition and multilamellar vesicle formation.

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Temperatura y concentración de fluoruro de sodio en geles fluorados

Yachay - Revista Científico Cultural ◽

10.36881/yachay.v7i01.76 ◽

2019 ◽

Vol 7 (01) ◽

pp. 294-301

Author(s):

Vianne Diana Huamán Baca ◽

Alejandro pablo Pletickosich ◽

Teófila Baca Carbajal

Keyword(s):

Sodium Fluoride ◽

Room Temperature ◽

Acidic Ph ◽

Influence Of Temperature ◽

Neutral Ph ◽

Influence Of Temperature On ◽

Para Determinar

ResumenEl objetivo de esta investigación fue determinar la influencia de la temperatura en la concentración de fluoruro de sodio; la muestra estuvo conformada por 60 geles fluorados de un mismo lote y la validez de dos marcas: ‘Fluofar®’ en sus dos presentaciones (pH neutro y acidulado) y el ‘Fluorgel Maquira®’ en sus dos presentaciones (pH neutro y acidulado). De cada gel fluorado se obtuvieron cuatro muestras: para comprobar el pH, para determinar la concentración de fluoruro de sodio a temperatura ambiente, para fijar la concentración de fluoruro de sodio después de haber sido sometido a una temperatura de 8 °C durante tres meses, y para, determinar la concentración de fluoruro de sodio después de haber sido sometido a una temperatura de 20 °C durante tres meses.La determinación de concentración de fluoruro de sodio, se realizó mediante la técnica de destilación y titulación. Por los resultados obtenidos se concluyó: que el incremento de la temperatura influye en la disminución de la concentración de fluoruro de sodio —siendo estadísticamente significativa en los geles fluorados con pH ácido (geles acidulados) y, en los geles fluorados con pH neutro mantiene su concentración—, aún se incrementó la temperatura. La concentración de fluoruro de sodio, indicado por el fabricante, disminuyó significativamente al comparar con la concentración de fluoruro de sodio encontrado en el laboratorio.Palabras claves; Geles fluorados, concentración de fluoruro de sodio, temperatura, pHAbstractThe objective of this investigation was to determine the influence of temperature on the concentration of sodium fluoride; the sample consisted of 60 fluorinated gels from the same batch and validity of two brands: Fluofar ® in its two presentations (neutral and acidulated pH) and Fluorgel Maquira ® and its two presentations (neutral pH and acidulated). From each fluorinated gel four samples were obtained: to determine the pH, to determine the concentration of sodium fluoride at room temperature, to determine the concentration of sodium fluoride after having been subjected to temperature of 8 °C for three months, and to determine the concentration of sodium fluoride after having been subjected to temperature of 20 °C for three months.The determination of concentration of Sodium Fluoride was carried out by means of the distillation and titration. From the results obtained, it was concluded that the increase in temperature influences the decrease in the concentration of sodium fluoride -being statistically significant in fluorinated gels with acidic pH (acidified gels) and, in fluorinated gels with neutral pH, it maintains its concentration-, the temperature was still increased. The concentration of sodium fluoride, indicated by the manufacturer, decreased significantly when compared to the concentration of sodium fluoride found in the laboratory.

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THE IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING ◽

10.32852/iqjfmme.v19i4.431 ◽

2019 ◽

Vol 19 (4) ◽

pp. 404-415

Author(s):

سماعيل تايه

Keyword(s):

Process Parameters ◽

Contact Time ◽

Room Temperature ◽

Date Palm ◽

Blue Dye ◽

Palm Tree ◽

Acidic Ph ◽

Adsorbate Concentration

In this study , the adsorption of an industrial blue dye was investigated by using date palm tree waste . The effect of the process parameters such as, contact time ; adsorbate concentration, ( pH) and (temperature ) are reported . "Nearly 2-3 hr of contact time are found to be sufficient for the adsorption to reach equilibrium" (A better fixation was obtained at acidic pH (2) and room temperature 25?C.

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