Tag: 300-400

Activation energies of displacements of water molecules in the presence of micelle-forming surfactants was written by Karmazina, T. V.;Petrachkov, A. A.. And the article was included in Dopovidi Natsional’noi Akademii Nauk Ukraini in 2005.SDS of cas: 104-73-4 This article mentions the following:

On the basis of neutron diffraction exptl. data, the activation energies of displacement of water mols. in the presence of nonionic and cationic micelle-forming surfactants have been estimated With increase in the concentration of nonionic surfactant (Triton X-100) even to the critical micelle-forming concentration, a decrease of the activation energy of displacements of water mols. is noticeable, but a decrease of the energy becomes not so significant with a subsequent increase of the concentration With increase of the concentration of cationic surfactant (dodecyl- and hexadecylpyridinium bromides) within the investigated concentrations, the activation energy of water mol. displacement increases. A procedure for estimating the activation energy in the presence of a homologous series of nonionic (oxyethylated alkylphenols) and cationic (alkylpyridinium bromides) micelle-forming surfactants is proposed. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4SDS of cas: 104-73-4).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.SDS of cas: 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthesis of some streoregular polydiacetylenes and the slow release of drug using some linear polymers was written by Al-Ajely, Mohammad S.;Sharif, A. Y.;Qasim, A. A.. And the article was included in Pakistan Journal of Chemistry in 2012.Related Products of 104-73-4 This article mentions the following:

Some polydiacetylenes have been synthesized using UV light in topochem. polymerization technique. Some diacetylene compounds were reacted with benzocaine and procaine in an attempt to be used as biosensors in topochem. polymerization process (In vivo). The linear (Amorphous) polymer was allowed to react with some com. antibiotics and were studied as slow drug release polymers. Externally treatment of the drug containing polymers to groups of infected rabbits revealed that these polymers are effective against certain types of micro organisms. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Related Products of 104-73-4).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Related Products of 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Thermal parameters associated to micellization of dodecylpyridinium bromide and chloride in aqueous solution was written by Galan, J. J.;Gonzales-Perez, A.;Del Cactillo, J. L.;Rodriguez, J. R.. And the article was included in Journal of Thermal Analysis and Calorimetry in 2002.Recommanded Product: 104-73-4 This article mentions the following:

Elec. conductivity of aqueous solutions of dodecylpyridinium chloride and bromide have been determined From these data the critical micelle concentration (cmc) was determined The thermal properties as standard Gibbs free energy, enthalpy and entropy of micellization was estimated from a uncharged-phase separation model and enables to obtain another properties like heat capacity of micellization and the relevant parameters in the min. of temperature dependence of cmc. The enthalpy-entropy compensation was shown for the studied compounds In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Recommanded Product: 104-73-4).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Recommanded Product: 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Single-Crystal Mesostructured Semiconductors with Cubic Ia3d Symmetry and Ion-Exchange Properties was written by Trikalitis, Pantelis N.;Rangan, Krishnaswamy K.;Bakas, Thomas;Kanatzidis, Mercouri G.. And the article was included in Journal of the American Chemical Society in 2002.Application In Synthesis of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

If the full scientific and technol. potential of mesostructured materials is to be achieved, systems with continuous domains in the form of single crystals or films must be prepared Here we report a reliable and facile system for making large single-crystal particles of chalcogenido mesostructured materials with a highly organized cubic structure, accessible pore structure, and semiconducting properties. Building blocks with square planar bonding topol., Pt²⁺ and [Sn₂Se₆]^4-, in combination with long-chain pyridinium surfactants (C_nPyBr, n = 18, 20) favor faceted single-crystal particles with the highest possible space group symmetry Ia3̅d. This is an important step toward developing large single-domain crystalline mesostructured semiconductors and usable natural self-assembled antidot array systems. The tendency toward cubic symmetry is so strong that the materials assemble readily under exptl. conditions that can tolerate considerable variation and form micrometer-sized rhombic dodecahedral cubosome particles. The c-C_nPyPtSnSe materials are the first to exhibit reversible ion-exchange properties. The surfactant mols. can be ion-exchanged reversibly and without loss of the cubic structure and particle morphol. The cubosomes possess a three-dimensional open Pt-Sn-Se framework with a low-energy band gap of âˆ?.7 eV. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Application In Synthesis of 1-Dodecylpyridin-1-ium bromide).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Application In Synthesis of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The influence of surfactants on separation processes involving membranes was written by Simion, Demetra;Niculescu, Olga;Gaidau, Carmen;Simion, Marius;Popescu, Georgeta;Chelaru, Ciprian. And the article was included in Revista de Pielarie Incaltaminte in 2011.Name: 1-Dodecylpyridin-1-ium bromide This article mentions the following:

The influence of surfactants upon the wettability of some hydrophobic microporous membranes of polysulfone was studied by determining the contact angle and the ultrafiltration rates. The water-membrane contact angle increases with roughness and changes in presence of the surfactant in aqueous solution to an extent which depends on its nature and concentration The variations of contact angle of surfactant in aqueous solution are in good agreement with the variation of the rate of ultrafiltration solutions through membranes and with the adsorption of surfactants on polysulfone surface. The method of measuring the contact angle is simple and rapid; it may be employed in characterization of polysulfone membrane, hydrophobicity in spite of the scattering of values obtained of microporous surfaces. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Name: 1-Dodecylpyridin-1-ium bromide).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Name: 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The Interaction between High-Molecular-Weight Flocculents and Ionic Surfactants was written by Barany, S.. And the article was included in Colloid Journal (Translation of Kolloidnyi Zhurnal) in 2002.Synthetic Route of C17H30BrN This article mentions the following:

The interaction between the anionic and cationic polyelectrolytes of various mol. masses and charges and the ionic surfactants in aqueous and salt solutions is studied by viscometry, conductometry, light scattering, and electrophoresis. Oppositely charged mols. of surfactant and polymer form strong complexes due to the forces of electrostatic attraction that is manifested in a significant decrease in the viscosity and light transmission, as well as in the relative reduction in solution conductivity As the surfactant/polyelectrolyte ratio increased, the forming complexes precipitated and then dissolved again. In the case of strongly charged polyelectrolytes, the partial dissolution of precipitates was observed preceding the wide region of destabilization. In this region, the value of surfactant/polyelectrolyte charge ratio reaches 3-4. The interaction between the cationic surfactants and anionic polyelectrolyte increases with the lengthening of alkyl radical, indicating the presence of cooperative interactions between the surfactant mols. bonded to polymer and the important role of relevant hydrophobic interactions. As a result, the interaction between the high-mol.-weight anionic polyelectrolytes and anionic surfactants containing aromatic core takes place in some cases. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Synthetic Route of C17H30BrN).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Synthetic Route of C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Reducing plant uptake of PAHs by cationic surfactant-enhanced soil retention was written by Lu, Li;Zhu, Lizhong. And the article was included in Environmental Pollution (Oxford, United Kingdom) in 2009.COA of Formula: C17H30BrN This article mentions the following:

Reducing the transfer of contaminants from soils to plants is a promising approach to produce safe agricultural products grown on contaminated soils. In this study, 0-400 mg/kg cetyltrimethylammonium bromide (CTMAB) and dodecylpyridinium bromide (DDPB) were sep. utilized to enhance the sorption of PAHs onto soils, thereby reducing the transfer of PAHs from soil to soil solution and subsequently to plants. Concentrations of phenanthrene and pyrene in vegetables grown in contaminated soils treated with the cationic surfactants were lower than those grown in the surfactant-free control. The maximum reductions of phenanthrene and pyrene were 66% and 51% for chrysanthemum (Chrysanthemum coronarium L.), 62% and 71% for cabbage (Brassica campestris L.), and 34% and 53% for lettuce (Lactuca sativa L.), resp. Considering the impacts of cationic surfactants on plant growth and soil microbial activity, CTMAB was more appropriate to employ, and the most ED was 100-200 mg/kg. Cationic surfactants could enhance the retention of PAHs in soil, and reduce PAH transfer to and accumulation in vegetables. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4COA of Formula: C17H30BrN).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.COA of Formula: C17H30BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Capillary zone electrophoresis for surfactant analysis in aqueous media was written by Kharitonova, Tatiana;Rudnev, Alexander;Ivanova, Nina. And the article was included in Progress in Colloid & Polymer Science in 2004.Quality Control of 1-Dodecylpyridin-1-ium bromide This article mentions the following:

Surfactant mixtures are commonly used in many industrial applications. At the same time, the methods for surfactant anal. are rather laborious and often do not permit the determination of the individual surfactant content in mixed solutions In the present work capillary zone electrophoresis (CZE) instrumentation was applied for the quant. anal. of a cationic surfactant (dodecylpyridinium bromide) and a nonionic surfactant (Triton X-100) in aqueous solutions The linear dependence of the anal. signal (peak area) vs. the surfactant concentration was established for both surfactants over a wide concentration range. The anal. signal of an individual surfactant was found to be independent of the addition of the second surface-active component, making it possible to determine the content of surfactants from both solutions of individual surfactants and mixed solutions The CZE method was shown to be appropriate for the determination of critical micelle concentrations as the intersection point of 2 straight lines describing the dependence of anal. signal vs. surfactant concentration below and above the critical micelle concentration In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Quality Control of 1-Dodecylpyridin-1-ium bromide).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Quality Control of 1-Dodecylpyridin-1-ium bromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In vitro surfactant structure-toxicity relationships: implications for surfactant use in sexually transmitted infection prophylaxis and contraception was written by Inacio, Angela S.;Mesquita, Katia A.;Baptista, Marta;Ramalho-Santos, Joao;Vaz, Winchil L. C.;Vieira, Otilia V.. And the article was included in PLoS One in 2011.Product Details of 104-73-4 This article mentions the following:

The need for woman-controlled, cheap, safe, effective, easy-to-use and easy-to-store topical applications for prophylaxis against sexually transmitted infections (STIs) makes surfactant-containing formulations an interesting option that requires a more fundamental knowledge concerning surfactant toxicol. and structure-activity relationships. The authers report in vitro effects of surfactant concentration, exposure time and structure on the viability of mammalian cell types typically encountered in the vagina, namely, fully polarized and confluent epithelial cells, confluent but non-polarized epithelial-like cells, dendritic cells, and human sperm. Representatives of the different families of com. available surfactants – nonionic (Triton X-100 and monolaurin), zwitterionic (DDPS), anionic (SDS), and cationic (C_nTAB (n = 10 to 16), C₁₂PB, and C₁₂BZK) – were examined Triton X-100, monolaurin, DDPS and SDS were toxic to all cell types at concentrations around their critical micelle concentration (CMC) suggesting a non-selective mode of action involving cell membrane destabilization and/or destruction. All cationic surfactants were toxic at concentrations far below their CMC and showed significant differences in their toxicity toward polarized as compared with non-polarized cells. Their toxicity was also dependent on the chem. nature of the polar head group. Our results suggest an intracellular locus of action for cationic surfactants and show that their structure-activity relationships could be profitably exploited for STI prophylaxis in vaginal gel formulations. The therapeutic indexes comparing polarized epithelial cell toxicity to sperm toxicity for all surfactants examined, except C₁₂PB and C₁₂BZK, does not justify their use as contraceptive agents. C₁₂PB and C₁₂BZK are shown to have a narrow therapeutic index recommending caution in their use in contraceptive formulations. The results contribute to understanding the mechanisms involved in surfactant toxicity, have a predictive value with regard to their safety, and may be used to design more effective and less harmful surfactants for use in topical applications for STI prophylaxis. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Product Details of 104-73-4).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Product Details of 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Sorption and desorption kinetics of surfactants TX-100 and DPC on different fractions of soils was written by Yeh, Carol Kuei-Jyum;Lin, Li-Chin. And the article was included in Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering in 2003.Application of 104-73-4 This article mentions the following:

Surfactant-based technologies are promising remediation alternatives. The information on sorption and desorption kinetics of surfactants on soils is important in the successful application of surfactant-based technologies. The sorption and desorption rates of nonionic surfactant TX-100 and cationic DPC were correlated to the surfactant concentration, soil organic matters (SOM), and soil cation exchange capacity (CEC). The results indicated that at higher initial surfactant concentrations, sorption rates of surfactants increased linearly with SOM and soil CEC for TX-100 and DPC, resp. The sorption rates and initial surfactant concentrations followed the 1st order relation for TX-100 and 2nd order for DPC. A linear relation between the sorption rates of surfactants and soil characteristics was developed. The desorption rates of TX-100 and DPC increased linearly with the increased surfactant levels sorbed on soils but were irrelevant to soil characteristics and the contact time of surfactant sorption. The rate of surfactant desorption was similar as the amount of surfactants sorbed on soils was in the same range. The cationic DPC sorbed and desorbed at 2 orders of magnitude faster than the nonionic TX-100, suggesting that both sorption and desorption have to be considered in the remediation process. In the experiment, the researchers used many compounds, for example, 1-Dodecylpyridin-1-ium bromide (cas: 104-73-4Application of 104-73-4).

1-Dodecylpyridin-1-ium bromide (cas: 104-73-4) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol� in pyridine vs. 150 kJ·mol� in benzene). Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Application of 104-73-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem