Bibliographies thématiques / Nanoparticles, Polymeric, menthol

Littérature scientifique sur le sujet « Nanoparticles, Polymeric, menthol »

Auteur : Grafiati
Publié le 14 mars 2023

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Articles de revues sur le sujet "Nanoparticles, Polymeric, menthol"

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Ali, Hajer, et Nawal Rajab. « Polymeric nanoparticle of Ebastine : Formulation, Characterization and in vitro Evaluation ». Journal of Complementary Medicine Research 14, no 1 (2023) : 16. http://dx.doi.org/10.5455/jcmr.2023.14.01.03.

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The main aim of this research work was the development and evaluation of polymeric nanoparticle for the bioavailability improvement of Ebastine (EBT) to treat allergic condition. EBT is a piperidine derivative that binds preferentially to peripheral H1 receptors and is a long-acting, non-sedating second-generation histamine receptor antagonist. It is practically insoluble in water (class II, according to BCS). This work aims to formulate and adjust Ebastine polymeric nanoparticles to improve the EBT solubility as well as dissolution rate. For the synthesis of PNPs, the solvent evaporation technique was used, and three different types of stabilizer that used (HPMC E5, Soluplus, tween 80). The particle size analysis indicated that the optimized formula EBT 9 had a reduced nanoparticulate size of 42 nm, with a 90 percent increase in in-vitro dissolution profile compared to 17 percent for the comparison Ebastine powder in 0.1 N HCl media (pH 1.2). As a result, polymeric nanoparticles formulation of weakly water soluble EBS greatly improved the drug's dissolving rate and increased its solubility.
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Cabaleiro-Lago, Celia, Sara Linse, Fiona Quinlan-Pluck, Aedin Minogue, Iseult Lynch, Dominic M. Walsh et Kenneth A. Dawson. « P2-422 : Co-polymeric nanoparticles inhibit Abeta fibrillogenesis ». Alzheimer's & ; Dementia 4 (juillet 2008) : T497. http://dx.doi.org/10.1016/j.jalz.2008.05.1501.

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Luda, Maria Paola, et Marco Zanetti. « Cyclodextrins and Cyclodextrin Derivatives as Green Char Promoters in Flame Retardants Formulations for Polymeric Materials. A Review ». Polymers 11, no 4 (11 avril 2019) : 664. http://dx.doi.org/10.3390/polym11040664.

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Polymers are intrinsically flammable materials; hence, fire retardance (FR) is required in their most common applications (i.e., electronic and construction, to mention some). Recently, it has been reported that cyclodextrin (CD) and cyclodextrin derivatives are beginning to be introduced into Intumescent Fire Retardant (IFR) formulations in place of pentaerythritol, which is used in IFRs that are currently on the market. Since IFRs are of less environmental concern than their hazardous halogen containing counterparts, the use of natural origin compounds in IFRs provides a way to comply with green chemistry issues. BCD and BCD derivatives presence in IFR mixtures promotes a higher yield of blowing gases and char when polymeric materials undergo combustion. Both processes play important roles in intumescence. The key rule to obtain in insulating compact char is the good dispersion of the nanoparticles in the matrix, which can be achieved by functionalizing nanoparticles with BCD derivatives. Moreover, CD derivatives are attractive because of their nanosized structure and their ability to form inclusion complexes with many compounds used as FR components, reducing their release to the environment during their shelf life of FR items. Often, fire retardance performed by BCD and BCD derivatives accompanies other relevant properties, such as improved mechanical resistance, washability resistance, self healing ability, thermal conductivity, etc. The application of CD fire retardant additives in many polymers, such as poly(lactic acid), poly(propylene), poly(vinyl acetate), poly(methyl methacrylate), linear low density poly(ethylene), polyamides, and polyesters are comprehensively reviewed here.
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Gries, Katharina, Kathrin Bubel, Malte Wohlfahrt, Seema Agarwal, Ulrich Koert et Andreas Greiner. « Preparation of Gold Nanoparticle- Poly(L -menthyl methacrylate) Conjugates via ATRP Polymerization ». Macromolecular Chemistry and Physics 212, no 23 (8 novembre 2011) : 2551–57. http://dx.doi.org/10.1002/macp.201100449.

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Castro-Muñoz, Roberto. « The Role of New Inorganic Materials in Composite Membranes for Water Disinfection ». Membranes 10, no 5 (14 mai 2020) : 101. http://dx.doi.org/10.3390/membranes10050101.

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Today, there is an increasing interest in improving the physicochemical properties of polymeric membranes by merging the membranes with different inorganic materials. These so-called composite membranes have been implemented in different membrane-based technologies (e.g., microfiltration, ultrafiltration, nanofiltration, membrane bioreactors, among others) for water treatment and disinfection. This is because such inorganic materials (such as TiO2-, ZnO-, Ag-, and Cu-based nanoparticles, carbon-based materials, to mention just a few) can improve the separation performance of membranes and also some other properties, such as antifouling, mechanical, thermal, and physical and chemical stability. Moreover, such materials display specific biological activity towards viruses, bacteria, and protozoa, showing enhanced water disinfection properties. Therefore, the aim of this review is to collect the latest advances (in the last five years) in using composite membranes and new hybrid materials for water disinfection, paying particular emphasis on relevant results and new hydride composites together with their preparation protocols. Moreover, this review addresses the main mechanism of action of different conventional and novel inorganic materials toward biologically active matter.
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Mostafa, Khaled, Heba Ameen, Mahmoud Morsy, Amal el-ebiassy, Azza El-Sanabary, Mohamed Adel et Ali Salah. « Production of high-performance textiles via pioneering strengthening approach using starch nanoparticles ». Journal of Industrial Textiles 50, no 3 (4 février 2019) : 278–92. http://dx.doi.org/10.1177/1528083719827365.

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To minimize the serious defects of durable press finishing of cellulosic textiles with respect to the great loss in strength properties, new pioneering strengthening approach of cotton fabric based on our previously prepared starch nanoparticles of size around 80–100 nm was used. For this purpose, cotton fabrics were treated with different concentrations of starch nanoparticles via coating technique using pad-dry-cure method, at which the starch nanoparticles are attached to the fabrics with the use of a padder adjusted to appropriate pressure and speed, followed by drying and curing. Fabric stiffness, surface roughness, tensile strength, elongation at break, abrasion resistance, wrinkle recovery angles, add-on %, and degree of whiteness as well as durability of treated fabrics were fully explored. SEM was used for detecting the change in surface morphology of reinforced coated fabric. The results obtained reflect the following findings: (a) all fabric performance like tensile strength, stiffness, wrinkle recovery angle, abrasion resistance and add on % were improved for coated fabrics with starch nanoparticles in comparison with untreated fabric, except that of surface roughness; (b) SEM confirmed the change in surface morphology of cotton fabric after reinforcement treatment using starch nanoparticles; (c) the dry wrinkle recovery angle and tensile strength of cotton fabrics treated in presence of 30 g/l starch nanoparticles are slightly decreased after 10 washing cycles as compared with untreated fabric; and (d) starch nanoparticles introduce an advance in textile finishing with respect to the above-mention fabric performance except that of surface roughness.
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Egorova, E. A., A. N. Useinova, S. A. Abibulaev, S. P. Mar'yanenko et K. N. Koryanova. « A modern view on the prevention and treatment of HIV-associated neurocognitive disorders ». Russian neurological journal 27, no 5 (23 novembre 2022) : 5–13. http://dx.doi.org/10.30629/2658-7947-2022-27-5-5-13.

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Acquired Immune Deficiency Syndrome (AIDS) is now considered one of the most global pandemics in human history. Despite the use of highly active antiretroviral therapy (HAART), HIV-1 infection is often accompanied by the development of CNS disorders, including neurocognitive disorders. The use of etiologic therapy has successfully prevented many of the possible terminal complications of the disease, but as patient survival time increases, the prevalence of cognitive impairment among AIDS patients is increasing. Theclinical manifestations of these disorders can rapidly progress from subtle attention deficits and behavioral disorders to the development of dementia. Diagnosing neurocognitive impairment in HIV-infected patients is usually difficult and requires consistent diagnostic procedures from the clinician, including initial screening and, if necessary, neuropsychiatric testing and neuroimaging. Early diagnosis and correction of neurocognitive impairment in HIV-infected individuals with adequate antiretroviral therapy is essential for successful treatment. The review also considers the use of drugs for the prevention and treatment of neurocognitive impairment, taking into account the peculiarities of persistence of the pathogen in the nervous system and the capabilities of modern medicine. One of the most promising methods of supporting therapy for such disorders is the delivery of antiretroviral drugs using various nanosystems (polymeric nanoparticles, lipid nanoparticles, nanogels, magnetic particles).
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El-Hefnawy, Mohamed E., Sultan Alhayyani, Mohsen M. El-Sherbiny, Mohamed I. Sakran et Mohamed H. El-Newehy. « Fabrication of Nanofibers Based on Hydroxypropyl Starch/Polyurethane Loaded with the Biosynthesized Silver Nanoparticles for the Treatment of Pathogenic Microbes in Wounds ». Polymers 14, no 2 (13 janvier 2022) : 318. http://dx.doi.org/10.3390/polym14020318.

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Fabrication of electrospun nanofibers based on the blending of modified natural polymer, hydroxyl propyl starch (HPS) as one of the most renewable resources, with synthetic polymers, such as polyurethane (PU) is of great potential for biomedical applications. The as-prepared nanofibers were used as antimicrobial sheets via blending with biosynthesized silver nanoparticles (AgNPs), which were prepared in a safe way with low cost using the extract of Nerium oleander leaves, which acted as a reducing and stabilizing agent as well. The biosynthesized AgNPs were fully characterized by various techniques (UV-vis, TEM, DLS, zeta potential and XRD). The obtained results from UV-vis depicted that the AgNPs appeared at a wavelength equal to 404 nm affirming the preparation of AgNPs when compared with the wavelength of extract (there are no observable peaks). The average particle size of the fabricated AgNPs that mediated with HPS exhibited a very small size (less than 5 nm) with excellent stability (more than −30 mv). In addition, the fabricated nanofibers were also fully characterized and the obtained data proved that the diameter of nanofibers was enlarged with increasing the concentration of AgNPs. Additionally, the findings illustrated that the pore sizes of electrospun sheets were in the range of 75 to 350 nm. The obtained results proved that the presence of HPS displayed a vital role in decreasing the contact angle of PU nanofibers and thus, increased the hydrophilicity of the net nanofibers. It is worthy to mention that the prepared nanofibers incorporated with AgNPs exhibited incredible antimicrobial activity against pathogenic microbes that actually presented in human wounds. Moreover, P. aeruginosa was the most sensitive species to the fabricated nanofibers compared to other tested ones. The minimal inhibitory concentrations (MICs) values of AgNPs-3@NFs against P. aeruginosa, and E. faecalis, were 250 and 500 mg/L within 15 min, respectively.
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Ray, Balmiki, Savita Bisht, Amarnath Maitra, Anirban Maitra et Debomoy K. Lahiri. « Neuroprotective and Neurorescue Effects of a Novel Polymeric Nanoparticle Formulation of Curcumin (NanoCurc™) in the Neuronal Cell Culture and Animal Model : Implications for Alzheimer's disease ». Journal of Alzheimer's Disease 23, no 1 (7 janvier 2011) : 61–77. http://dx.doi.org/10.3233/jad-2010-101374.

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Agrawal, Amaiyya, et Sankha Bhattacharya. « Cutting-edge nanotechnological approaches for lung cancer therapy ». Current Drug Research Reviews 14 (18 avril 2022). http://dx.doi.org/10.2174/2589977514666220418085658.

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Abstract: Lung cancer is the second leading cancer with a high rate of mortality. It can be treated using different intervention techniques such as chemotherapy, radiation therapy, surgical removal, photodynamic therapy. All of these interventions lack specificity, which implies that it harms the normal cells adjacent to the infected ones. Nanotechnology provides a promising solution that increases the bioavailability of anticancer drugs at the tumor site with reduced toxicity and improved therapeutic efficacy. Nanotechnology also improved the way lung cancer is diagnosed and treated. Various types of nanocarriers like liposomes, polymeric nanoparticles, magnetic nanoparticles, and different theranostic approaches are already approved for medical use, while various are under clinical and preclinical stages. This review article covers the details pertaining to lung cancer, types of overexpressed receptors, and cutting-edge nanocarriers used for treating lung cancer at its specific target.
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