Relevant bibliographies by topics / Aqueous Organogel

Academic literature on the topic 'Aqueous Organogel'

Author: Grafiati
Published: 8 June 2024

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Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters

Journal articles on the topic "Aqueous Organogel":

1

Giuri, Demetra, Nicola Zanna, and Claudia Tomasini. "Low Molecular Weight Gelators Based on Functionalized l-Dopa Promote Organogels Formation." Gels 5, no. 2 (May 14, 2019): 27. http://dx.doi.org/10.3390/gels5020027.

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We prepared the small pseudopeptide Lau-l-Dopa(OBn)2-d-Oxd-OBn (Lau = lauric acid; l-Dopa = l-3,4-dihydroxyphenylalanine; d-Oxd = (4R,5S)-4-methyl-5-carboxyl-oxazolidin-2-one; Bn = benzyl) through a number of coupling reactions between lauric acid, protected l-Dopa and d-Oxd with an excellent overall yield. The ability of the product to form supramolecular organogels has been tested with different organic solvents of increasing polarity and compared with the results obtained with the small pseudopeptide Fmoc-l-Dopa(OBn)2-d-Oxd-OBn. The mechanical and rheological properties of the organogels demonstrated solvent-dependent properties, with a storage modulus of 82 kPa for the ethanol organogel. Finally, to have a preliminary test of the organogels’ ability to adsorb pollutants, we treated a sample of the ethanol organogel with an aqueous solution of Rhodamine B (RhB) for 24 h. The water solution slowly lost its pink color, which became trapped in the organogel.
2

Patel, A. R., B. Mankoč, M. D. Bin Sintang, A. Lesaffer, and K. Dewettinck. "Fumed silica-based organogels and ‘aqueous-organic’ bigels." RSC Advances 5, no. 13 (2015): 9703–8. http://dx.doi.org/10.1039/c4ra15437a.

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We report the use of fumed silica as a structurant for creating an organogel with a triglyceride solvent (vegetable oil) as the continuous phase. The organogel was further used to prepare aqueous-organic bigels.
3

Karole, Sarita, Akash Sagar, Anup K. Chakraborty, and Kavita R. Loksh. "Formulation, development and characterization of topical organogel of mometasone furoate for the treatment of skin disease." Indian Journal of Pharmacy and Pharmacology 9, no. 1 (March 15, 2022): 51–56. http://dx.doi.org/10.18231/j.ijpp.2022.009.

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Topical glucocorticoid formulations are widely used for effective treatment and control of a variety of dermatoses. Mometasone furoate is a medium potency, synthetic, non-fluorinated topical corticosteroid, indicated for the relief of inflammatory and pruritic manifestations of corticosteroid responsive dermatoses including psoriasis. The percutaneous absorption increases risk associated with systemic absorption of topically applied formulation. Controlled release of the drug to the skin could reduce the side effects while reducing percutaneous absorption. Organogels are semi-solid materials, in which an organic phase is immobilized by a three-dimensional network composed of self-organized system, forming the aqueous phase. The present study deals with the preparation and evaluation of a pluronic lecithin organogel gel containing mometasone furoate for transdermal delivery. Blank pluronic lecithin organogel were prepared using ricinoleic acid as the oil phase. Formulation, Development and Characterization of Topical Organogel of Mometasone Furoate was carried out and evaluated for the treatment of Skin Disease. The absorption maxima of mometasone furoate were determined by running the spectrum of drug solution in double beam ultraviolet spectrophotometer (Labindia UV 3000+) using concentration range of 5-25μg/ml mometasone furoate in 7.4 phosphate buffers. The IR spectrum of sample drug and drug with excipients shows the peak values which are characteristics of the drug. The formulated gel formulation was evaluated with parameter appearance, consistency, drug content pH, viscosity, spreadability, in-vitro release test, washability, extrudability study and stability studies. FT-IR studies revealed no interaction between the drug and excipients. Selected organogels (F3) showed a drug content of 99.45±0.14% and drug release of 99.12 % in10 hrs. The results suggest that the developed organogels formulation containing mometasone furoate can be of actual value for improving the clinical effectiveness in the treatment of psoriasis.
4

Razaq, Duaa, Masar Basim Mohsin Mohamed, and Lina A. Dahabiyeh. "Formulation and Characterization of Curcumin 12-Hydroxystearic Acid in Triacetin Organogel for Topical Administration." Al Mustansiriyah Journal of Pharmaceutical Sciences 24, no. 2 (April 8, 2024): 190–204. http://dx.doi.org/10.32947/ajps.v24i2.1011.

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Background: Curcumin (CUR) and its derivatives have shown a wide variety of biological activities, such as anti-oxidant, anti-inflammatory, anti-tumor, antimicrobial and antiparasitic effects as well as for the treatment of skin diseases. Due to its physico-chemical limitations such as low aqueous solubility and low bioavailability, we developed curcumin organogel as a topical delivery system to overcome those limitations. The12-hydroxystearic acid (12-HSA) is well known as a low-molecular-weight organogelators (LMOGs) capable of gelling an organic liquid phase. Different concentrations of (12-HSA) in triacetin with 50 mg CUR were gelled and applied for various examinations: tabletop rheology, oil binding capacity, pH measurement, spreadability, in vitro drug release, antibacterial activity and oscillatory rheology studies. The results revealed that the organogels transition temperatures from solid to liquid were greater than the normal body temperature, this helped the organogels keep their shape; they had good spreadability,and the organogels pH levels were within the safe range for the skin . In vitro release data showed that 4% 12HSA+5%CUR +TA (4TA) gave us 100% release after 6 hours. The selected 4TA illustrated good viscoelastic properties in the amplitude sweep test and a frequency-independent as seen in the frequency sweep test. CUR has good antibacterial action against Staphylococcus aureus; Streptococcus pyrogen, Proteus mirabilis, and Escherichia coli, which prevail at the site of wound injury as this pointed out that 4TA organogel can be used for topical wound healing.
5

Воронова (Voronova), Марина (Marina) Игоревна (Igorevna), Олег (Oleg) Валентинович (Valentinovich) Суров (Surov), Наталья (Natal'ya) Викторовна (Viktorovna) Рублева (Rubleva), Наталья (Natal'ya) Евгеньевна (Evgenievna) Кочкина (Kochkina), and Анатолий (Anatoliy) Георгиевич (Georgievich) Захаров (Zakharov). "DISPERSIBILITY OF NANOCRYSTALLINE CELLULOSE IN ORGANIC SOLVENTS." chemistry of plant raw material, no. 1 (March 6, 2019): 39–50. http://dx.doi.org/10.14258/jcprm.2019014240.

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Aqueous suspensions of nanocrystalline cellulose (NCC) were obtained by sulfuric acid hydrolysis using the standard procedure. Suspensions, films and airgel of NCC were characterized by various methods: the degree of polymerization was determined, elemental analysis was carried out, the degree of crystallinity and crystallite size were calculated on the basis of X-ray data, the morphology of NCC aerogels was studied using scanning electron microscopy. The particle size of the NCC was determined using a transmission electron microscope, a scanning atomic-force microscope and the method of dynamic light scattering. NFC hydrosols with different pH were used to prepare lyophilized NCC samples. From NCC hydrosols with pH 2.2, by gradual replacement of water with an organic solvent, NCC organogels with acetone, acetonitrile and ethanol were obtained. The process of dispersion of lyophilized NCC and NCC organogels (acetone, acetonitrile and ethanol) in water and in 11 organic solvents was investigated. The effect of the pH of the initial aqueous suspension of the NCC and the solvent forming the NCC organogel on the repeated dispersibility of the NCC is shown. The optimum pH value of the initial aqueous suspension of NCC was determined, which determines the maximum dispersibility of the lyophilized samples in each specific solvent. It was shown that dispersion of acetone, acetonitrile and ethanol organogels in most of the solvents studied occurs with the formation of particles less than 100 nm.
6

Ma, Yao, Massimo Cametti, Zoran Džolić, and Shimei Jiang. "Selective Cu(ii) sensing by a versatile AIE cyanostilbene-based gel system." Soft Matter 15, no. 30 (2019): 6145–50. http://dx.doi.org/10.1039/c9sm00955h.

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Pyridyl-oxalamido-cyanostilbene 1 is a versatile ambidextrous gelator forming organo-, hydro-, and Cu(ii) specific metallogels. A rare organogel-to-metallogel transformation was also observed upon exposure of 1-DMSO/H2O gel to aqueous Cu(ii).
7

Mehta, Chetna, Ganesh Bhatt, and Preeti Kothiyal. "A Review on organogel for skin aging." Indian Journal of Pharmaceutical and Biological Research 4, no. 03 (September 30, 2016): 28–37. http://dx.doi.org/10.30750/ijpbr.4.3.5.

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Skin aging is one of the prominent problems associated with skin as each part of body ages with the time, skin is the external organ where the sign and symptoms of aging are readily evident. However cosmetics as well as pharmaceutical approaches delayed skin aging. Gel are best fitted in all these essential criteria because of their excellent appearance, smoothness, desired consistency, fast drug release, ease of manufacturing and quality assessment and admirable stability. Recently gel formulation have been modified to yield an advance drug delivery system known as ―organogels‖. Gel define as a semi-solid preparation having an external solvent phase, apolar [organogel] or polar [hydrogel] immobilized within the space available of a three dimensional network structure. Lecithin is a natural surfactant isolated from eggs or soya bean, when it combined with water and non-polar solvent, it form gels. PLO gels have gained importance in recent years as transdermal drug delivery system. It is a thermodynamically stable, visco-elastic system, which is non-irritating, odorless and biodegradable. Pluronic F127 or poloxamer is a copolymer of polyoxyethylene and polyoxypropylene which forms a thermoreversible gel in concentrations between 15-30%w/v. Water plays the role of a structure-forming agent and stabilizes the process of gel formation as it solubilizes the pluronic and other hydrophilic drugs. PLO gel system facilitates the delivery of hydrophilic as well as lipophilic drugs owing to the presence of both oil and aqueous phases within the gel system.
8

Bonifazi, Evelyn L., Valeria C. Edelsztein, Guillermo O. Menéndez, Cecilia Samaniego López, Carla C. Spagnuolo, and Pablo H. Di Chenna. "Versatile Supramolecular Organogel with Outstanding Stability toward Aqueous Interfaces." ACS Applied Materials & Interfaces 6, no. 12 (June 12, 2014): 8933–36. http://dx.doi.org/10.1021/am5010656.

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9

Nii, S., S. Okumura, T. Kinoshita, Y. Ishigaki, K. Nakano, K. Yamaguchi, and S. Akita. "Extractant-impregnated organogel for capturing heavy metals from aqueous solutions." Separation and Purification Technology 73, no. 2 (June 18, 2010): 250–55. http://dx.doi.org/10.1016/j.seppur.2010.04.009.

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10

Murdan, S. "Interaction of a nonionic surfactant-based organogel with aqueous media." International Journal of Pharmaceutics 180, no. 2 (April 15, 1999): 211–14. http://dx.doi.org/10.1016/s0378-5173(99)00007-1.

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You might also be interested in the extended bibliographies on the topic 'Aqueous Organogel' for particular source types:
Journal articles

Dissertations / Theses on the topic "Aqueous Organogel":

1

Rangel, Euzcateguy Geraldine del Valle. "Synthèse, formulation et caractérisation d’organogels aqueux moléculaires/macromoléculaires à base de produits bio-sourcés." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0300.

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Dans ce travail, un acide aminé naturel, la lysine, a été modifié chimiquement pour synthétiser trois agents gélifiants de structures similaires et différant les uns des autres par un ou deux groupes fonctionnels. Les trois molécules étaient entièrement solubles dans le diméthylsulfoxyde (DMSO) et les mélanges gélifiés DMSO/H2O avec diverses compositions donnant naissance à des organogels aqueux. Des hydrogels pourraient être produits après dialyse de gels DMSO/H2O. La résistance mécanique des gels, la réversibilité thermique/mécanique, la température de transition gel-sol ainsi que la cinétique de formation du gel ont été analysées et corrélées à la structure chimique des gélifiants ainsi qu'à la composition du solvant. Des équations semi-empiriques ont été utilisées pour décrire les résultats expérimentaux. Les résultats de l'observation visuelle, des mesures rhéologiques, des spectres FT-IR et Raman ont été comparés. Nous avons démontré que de subtiles variations dans la structure chimique du gélifiant, modifiaient considérablement certaines propriétés comme le temps de formation du gel (qui variait entre 10s et 1h30) ou la réversibilité thermique. La voie de formulation doit être adaptée au comportement gélifiant de chaque molécule. De plus, une géométrie spécifique a été conçue pour les mesures rhéologiques. La modification des propriétés du gel par l'ajout d'un polysaccharide non ionique (dextrane, Mn 200000 g.mol-1) a également été étudiée en dessous et au-dessus de sa concentration critique de chevauchement. Selon la formulation des gels, leurs propriétés macroscopiques pourraient être adaptées à des applications spécifiques
In that work, a natural amino acid, lysine, has been chemically modified for synthesizing three gelling agents with similar structures and differing from each other by one or two functional groups. All three molecules were fully soluble in dimethylsulfoxide (DMSO) and gelled DMSO/H2O mixtures with various compositions giving rise to aqueous organogels. Hydrogels could be produced after dialysis of DMSO/H2O gels. Mechanical strength of the gels, thermal/mechanical reversibility, temperature of gel-sol transition as well as kinetics of gel formation were analysed and correlated to the chemical structure of the gelators as well as to the composition of solvent. Semi-empirical equations were used to describe the experimental results. The results of visual observation, rheological measurements, FT-IR and Raman spectra were compared. We demonstrated that subtle variations in the chemical structure of the gelator dramatically modified some properties like the time for gel formation (which varied between 10 s and 1h30) or thermal reversibility. The formulation pathway must be adapted to the gelling behaviour of each molecule. In addition a specific geometry was designed for rheological measurements. The modification of gel properties by the addition of a non ionic polysaccharide (dextran, Mn ≈ 200,000 g.mol-1) was also investigated below and above its critical overlap concentration. According to the formulation of gels, their macroscopic properties could be adapted to specific applications

Book chapters on the topic "Aqueous Organogel":

1

Ozel, B. "Organogels." In Bioactive Delivery Systems for Lipophilic Nutraceuticals, 232–66. The Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839165566-00232.

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The majority of nutraceutical compounds have very limited solubility in aqueous solvents. So it is necessary to design systems in order to encapsulate lipophilic nutraceutical compounds. Organogels offer a great potential for the encapsulation of such compounds. Organogels are also able to deliver nutraceuticals to food systems or directly to the human gastrointestinal tract. Moreover, organogel systems protect the encapsulated compounds from oxidation and degradation so that these compounds could maintain their nutritional values. Incorporation of liquid oil containing organogels into food matrices is a practical method to replace the saturated fat content of many food products. Additionally, design of physiologically responsive organogels for the controlled release of nutraceuticals in the human gastrointestinal system is also gaining interest. Another focus in the field is to increase the number of safe and food grade gelators for the production of new and functional organogels. Minimizing the negative effects of organogel production processes is also an important point of interest. This chapter refers to the molecular-physicochemical properties and formation methods of organogels. The applicable range and the positive and negative aspects of various organogel systems have also been presented.
2

Mishra, Sunita, and M. A. Firdaus. "Formulation of Edible Bigel with Potential to Trans-Fat Replacement in Food Products." In Food Processing [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.110517.

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A new issue for the scientific community is to find efficient replacements for unhealthy fat without damaging the organoleptic qualities of the food product in light of growing concerns about the consumption of harmful trans fats in the diet. Bigel is supposedly a novel structured fat system utilised for industrial purposes due to their nutritional advantages, one of numerous solutions intended to replace trans fats in food. These have a lot of potential in the food industry, and are composed of an aqueous phase known as a hydrogel and an organic phase known as an organogel or oleogel. A gel known as an oleogel has oil as its liquid component. Oleogelators, which aid in the development of gels, frequently have low molecular weight, whereas typical hydrogelators have large molecular weight since they are polymeric. A hydrogel is a gel in which water serves as the immobilised phase. Therefore, a bigel is a biphasic system made up of an oleogel and a hydrogel. This chapter will concentrate on the various bigel formulation techniques and chemistry, as well as their latest food uses, and other industries that fit their requirements.
3

Taber, Douglass F. "The Fürstner Synthesis of Amphidinolide F." In Organic Synthesis. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190646165.003.0090.

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The amphidinolides, having zero, one, or (as exemplified by amphidinolide F 3) two tetrahydrofuran rings, have shown interesting antineoplastic activity. It is a tribute to his development of robust Mo catalysts for alkyne metathesis that Alois Fürstner of the Max-Planck-Institut für Kohlenforschung Mülheim could with confidence design (Angew. Chem. Int. Ed. 2013, 52, 9534) a route to 3 that relied on the ring-closing metathesis of 1 to 2 very late in the synthesis. Three components were prepared for the assembly of 1. Julia had already reported (J. Organomet. Chem. 1989, 379, 201) the preparation of the E bromodiene 5 from the sulfone 4. The alcohol 7 was available by the opening of the enantiomerically-pure epoxide 6 with propynyl lithium, followed by oxidation following the Pagenkopf pro­tocol. Amino alcohol-directed addition of the organozinc derived from 5 to the alde­hyde from oxidation of 7 completed the assembly of 8. Addition of the enantiomer 10 of the Marshall butynyl reagent to 9 followed by protection, oxidation to 11, and addition of, conveniently, the other Marshall enan­tiomer 12 led to the protected diol 13. Silylcupration–methylation of the free alkyne set the stage for selective desilylation and methylation of the other alkyne. Iodination then completed the trisubstituted alkene of 14. Methylation of the crystalline lactone 15, readily prepared from D-glutamic acid, led to a mixture of diastereomers. Deprotonation of that product followed by an aque­ous quench delivered 16. Reduction followed by reaction with the phosphorane 17 gave the unsaturated ester, that cyclized with TBAF to the crystalline 18. The last ste­reogenic center of 22 was established by proline-mediated aldol condensation of the aldehyde 19 with the ketone 20. To assemble the three fragments, the ketone of 21 was converted to the enol triflate and thence to the alkenyl stannane. Saponification gave the free acid 22, that was acti­vated, then esterified with the alcohol 18. Coupling of the stannane with the iodide 14 followed by removal of the TES group led to the desired diyne 1. It is noteworthy that the Mo metathesis catalyst is stable enough to tolerate the free alcohol of 1 in the cyclization to 2.

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