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1.
Mass Spectrom Rev ; 41(5): 766-803, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-33624883

RESUMEN

There has been a rising concern regarding the harmful impact of biotoxins, source of origin, and the determination of the specific type of toxin. With numerous reports on their extensive spread, biotoxins pose a critical challenge to figure out their parent groups, metabolites, and concentration. In that aspect, liquid chromatography-mass spectrometry (LC-MS) based analysis paves the way for its accurate identification and quantification. The biotoxins are ideally categorized as phytotoxins, mycotoxins, shellfish-toxins, ciguatoxins, cyanotoxins, and bacterial toxins such as tetrodotoxins. Considering the diverse nature of biotoxins, both low-resolution mass spectrometry (LRMS) and high-resolution mass spectrometry (HRMS) methods have been implemented for their detection. The sample preparation strategy for complex matrix usually includes "QuEChERS" extraction or solid-phase extraction coupled with homogenization and centrifugation. For targeted analysis of biotoxins, the LRMS consisting of a tandem mass spectrometer operating in multiple reaction monitoring mode has been widely implemented. With the help of the reference standard, most of the toxins were accurately quantified. At the same time, the suspect screening and nontarget screening approach are facilitated by the HRMS platforms during the absence of reference standards. Significant progress has also been made in sampling device employment, utilizing novel sample preparation strategies, synthesizing toxin standards, employing hybrid MS platforms, and the associated data interpretation. This critical review attempts to elucidate the progress in LC-MS based analysis in the determination of biotoxins while pointing out major challenges and suggestions for future development.


Asunto(s)
Toxinas Marinas , Espectrometría de Masas en Tándem , Cromatografía Liquida/métodos , Toxinas Marinas/análisis , Estándares de Referencia , Extracción en Fase Sólida , Espectrometría de Masas en Tándem/métodos
2.
Crit Rev Food Sci Nutr ; : 1-19, 2023 Dec 08.
Artículo en Inglés | MEDLINE | ID: mdl-38063355

RESUMEN

Spices are a rich source of vitamins, polyphenols, proteins, dietary fiber, and minerals such as calcium, magnesium, iron, and zinc, all of which play an important role in biological functions. Since ancient times, spices have been used in our kitchen as a food coloring agent. Spices like cinnamon and turmeric allegedly contain various functional ingredients, such as phenolic and volatile compounds. Therefore, this review aims to summarize the current knowledge about the nutritional profiles of cinnamon and turmeric, as well as to analyze the clinical studies on their extracts and essential oils in animals and humans. Furthermore, their enrichment applications for food products and animal feed have also been investigated in terms of safety and toxicity. Numerous studies have shown that cinnamon and turmeric have various health benefits, including the reduction of insulin resistance and insulin signaling pathways in diabetic patients, the reduction of inflammatory biomarkers, and the maintenance of gut microflora in both animals and humans. The food and animal feed industries have taken notice of these health benefits and have begun to promote cinnamon and turmeric as healthy foods. This has resulted in the development of new food products and animal feeds that contain cinnamon and turmeric as primary ingredients, which have been deemed an effective means of promoting cinnamon and turmeric's health benefits.

3.
Crit Rev Food Sci Nutr ; : 1-20, 2023 Oct 09.
Artículo en Inglés | MEDLINE | ID: mdl-37811640

RESUMEN

Nowadays, fruits are gaining high demand due to their promising advantages on human health. Astonishingly, their by-products, that is, seeds and peels, account for 10-35% of fruit weight and are usually thrown as waste after consumption or processing. But it is neglected that fruit seeds also have functional properties and nutritional value, and thus could be utilized for dietary and therapeutic purposes, ultimately reducing the waste burden on the environment. Owing to these benefits, researchers have started to assess the nutritional value of different fruits seeds, in addition to the chemical composition in various bioactive constituents, like carotenoids (lycopene), flavonoids, proteins (bioactive peptides), vitamins, etc., that have substantial health benefits and can be used in formulating different types of food products with noteworthy functional and nutraceutical potential. The current review aims to comprehend the known information of nutritional and phytochemical profiling of non-edible fruits seeds, viz. apple, apricot, avocado, cherry, date, jamun, litchi, longan, mango, and papaya. Additionally, clinical studies conducted on these selected non-edible fruit seed extracts, their safety issues and their enrichment in food products as well as animal feed has also been discussed. This review aims to highlight the potential applications of the non-edible fruit seeds in developing new food products and also provide a viable alternative to reduce the waste disposal issue faced by agro-based industries.

4.
Environ Res ; 229: 115940, 2023 07 15.
Artículo en Inglés | MEDLINE | ID: mdl-37080276

RESUMEN

Long-term exposure to the highly toxic heavy metal arsenic can harm ecological systems and pose serious health risks to humans. Arsenic pollutant in water and the food chain must be addressed, and active prompt detection of As(III) is essential. The development of an effective detection method for As(III) ions is urgently needed to slow the alarming growth of arsenic pollution in the environment and safeguard the well-being of future generations. This study presents the results of our exhaustive investigation into cubic CsPbBr3 single crystals, the glassy carbon (GC) electrode modification with CsPbBr3 single crystals prepared by direct solvent evaporation, as well as our observations of the material's remarkable electrocatalytic properties and exceptional anti-interference sensing of As(III) ions in neutral pH media. The developed CsPbBr3/GC is exceptionally useful for the ultra-sensitive and specific identification of arsenic in water, exhibiting a detection limit of 0.381 µmol/L, a rapid response across a defined range of 0.1-25 µmol/L, and an ultra-sensitivity of 0.296 µA/µmolL-1. CsPbBr3/GCE (prepared without a specific reagent) is superior to other modified electrodes used as sensors in electrocatalytic activity, detection limit, analytical sensitivity, and stability response.


Asunto(s)
Arsénico , Humanos , Límite de Detección , Arsénico/análisis , Sustancias Peligrosas , Técnicas Electroquímicas/métodos , Agua , Carbono/química
5.
Environ Res ; 204(Pt A): 111963, 2022 03.
Artículo en Inglés | MEDLINE | ID: mdl-34450157

RESUMEN

The demand for the green synthesis of nanoparticles has gained prominence over the conventional chemical and physical syntheses, which often entails toxic chemicals, energy consumption and ultimately lead to negative environmental impact. In the green synthesis approach, naturally available bio-compounds found in plants and fungi can be effective and have been proven to be alternative reducing agents. Fungi or mushrooms are particularly interesting due to their high content of bioactive compounds, which can serve as excellent reducing agents in the synthesis of nanoparticles. Apart from the economic and environmental benefits, such as ease of availability, low synthesis/production cost, safe and no toxicity, the nanoparticles synthesized from this green method have unique physical and chemical properties. Stabilisation of the nanoparticles in an aqueous solution is exceedingly high, even after prolonged storage with unperturbed size uniformity. Biological properties were significantly improved with higher biocompatibility, anti-microbial, anti-oxidant and anti-cancer properties. These remarkable properties allow further exploration in their applications both in the medical and agricultural fields. This review aims to explore the mushroom-mediated biosynthesis of nanomaterials, specifically the mechanism and bio-compounds involved in the synthesis and their interactions for the stabilisation of nanoparticles. Various metal and non-metal nanoparticles have been discussed along with their synthesis techniques and parameters, making them ideal for specific industrial, agricultural, and medical applications. Only recent developments have been explored in this review.


Asunto(s)
Nanopartículas del Metal , Nanoestructuras , Hongos , Tecnología Química Verde , Plantas
6.
Environ Res ; 214(Pt 1): 113742, 2022 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-35753376

RESUMEN

The synthesis of bilayer heterojunctions has received considerable attention recently. Fabrication of novel bilayer composites is of significant interest to improve their photocatalytic efficiency. In this study, molybdenum disulfide (MoS2), a layered dichalcogenide material exhibiting unique properties, in combination with graphitic carbon nitride (g-C3N4), a carbon-based layered material, was fabricated with small amounts of zinc oxide (ZnO). Three composites, MoS2/g-C3N4, MoS2/ZnO, and MoS2/g-C3N4/ZnO were prepared via a simple exfoliation method and characterized by various physicochemical methods. The Z-scheme charge transfer mechanism in the prepared ternary composite improves efficiency by inhibiting the recombination rate of electron-hole pairs. It has shown excellent performance in degrading a major water contaminant, malachite green (MG) dye, under visible light irradiation.

7.
Mikrochim Acta ; 190(4): 143, 2023 03 18.
Artículo en Inglés | MEDLINE | ID: mdl-36933103
8.
Hum Resour Health ; 13: 50, 2015 Jun 22.
Artículo en Inglés | MEDLINE | ID: mdl-26093908

RESUMEN

BACKGROUND: A medium- and long-term perspective is required in human resource development to ensure that future needs and demands for oral healthcare are met by the most appropriate health professionals. This paper presents a case study of the Sultanate of Oman, one of the Gulf States with a current population of 3.8 million, which has initiated dental training through the creation of a dental college. OBJECTIVES: The objectives of this paper are first to describe trends in the dental workforce in Oman from 1990 to date and compare the dental workforce with its medical counterparts in Oman and with other countries, and second, to consider future dental workforce in the Sultanate. METHODS: Data were collected from published sources, including the Ministry of Health (MoH), Ministry of Manpower (MoM), and Ministry of National Economy (MoNE)-Sultanate of Oman; the World Health Organization (WHO); World Bank; and the Central Intelligence Agency (CIA). Dentist-to-population ratios were compared nationally, regionally and globally for medicine and dentistry. Dental graduate outputs were mapped onto the local supply. Future trends were examined using population growth predictions, exploring the expected impact in relation to global, regional and European workforce densities. RESULTS: Population growth in Oman is increasing at a rate of over 2% per year. Oman has historically been dependent upon an expatriate dental workforce with only 24% of the dentist workforce Omani in 2010 (n = 160). Subsequent to Oman Dental College (ODC) starting to qualify dental (BDS) graduates in 2012, there is an increase in the annual growth of the dentist workforce. On the assumption that all future dental graduates from ODC have an opportunity to practise in Oman, ODC graduates will boost the annual Omani dentist growth rate starting at 28% per annum from 2012 onwards, building capacity towards global (n = 1711) and regional levels (Gulf State: n = 2167) in the medium term. CONCLUSION: The output of dental graduates from Oman Dental College is improving the dentist-to-population ratio and helping the Sultanate to realize its aim of developing an Omani-majority dental workforce. The implications for retention of dentists and team training are discussed.


Asunto(s)
Creación de Capacidad , Odontología , Odontólogos/provisión & distribución , Educación en Odontología , Fuerza Laboral en Salud/tendencias , Humanos , Omán , Crecimiento Demográfico , Facultades de Odontología
9.
J Nanobiotechnology ; 12: 20, 2014 May 12.
Artículo en Inglés | MEDLINE | ID: mdl-24885994

RESUMEN

BACKGROUND AND AIMS: Multiple emulsions have excellent encapsulating potential and this investigation has been aimed to encapsulate two different plant extracts as functional cosmetic agents in the W/O/W multiple emulsions and the resultant system's long term stability has been determined in the presence of a thickener, hydroxypropyl methylcellulose (HPMC). METHODS: Multiple W/O/W emulsions have been generated using cetyl dimethicone copolyol as lipophilic emulsifier and a blend of polyoxyethylene (20) cetyl ether and cetomacrogol 1000® as hydrophilic emulsifiers. The generated multiple emulsions have been characterized with conductivity, pH, microscopic analysis, phase separation and rheology for a period of 30 days. Moreover, long term shelf-storage stability has been tested to understand the shelf-life by keeping the generated multiple emulsion formulations at 25 ± 10°C and at 40 ± 10% relative humidity for a period of 12 months. RESULTS: It has been observed that the hydrophilic emulsifiers and HPMC have considerably improved the stability of multiple emulsions for the followed period of 12 months at different storage conditions. These multiple emulsions have shown improved entrapment efficiencies concluded on the release rate of conductometric tracer entrapped in the inner aqueous phase of the multiple emulsions. CONCLUSION: Multiple emulsions have been found to be stable for a longer period of time with promising characteristics. Hence, stable multiple emulsions loaded with green tea and lotus extracts could be explored for their cosmetic benefits.


Asunto(s)
Cosméticos/administración & dosificación , Emulsionantes/química , Emulsiones/química , Lotus/química , Extractos Vegetales/administración & dosificación , Té/química , Cosméticos/química , Nanoestructuras/química , Nanoestructuras/ultraestructura , Extractos Vegetales/química
10.
Adv Mater ; : e2406081, 2024 Jun 17.
Artículo en Inglés | MEDLINE | ID: mdl-38886842

RESUMEN

Recent advances in the use of stable isotopes necessitate novel synthesis techniques for isotope separation and enrichment that are scalable and offer high throughput. Stable-isotope-enriched nanostructures can offer unique advantages as nanomedicines, safe tracers, and labels and are critical for applications in various industrial processes, metabolic research, and medicine. So far, there exists no method to synthesize miniature isotope-enriched materials at the nanoscale. In this study, an ultrafast Laser-induced isotope enrichment at nanoscale (LIIEN) is put forward to synthesize isotope-enriched nanostructures, eliminating the need for large equipment and expenses, thereby demonstrating a lab-scale isotope enrichment process. A significant isotope enrichment for Carbon nanostructures is observed. The isotope enrichment can be attributed to the redistribution of isotope ions in the plasma plume explained by the plasma centrifuge model. The LIIEN synthesized structures exhibit excellent Surface-Enhanced Raman Scattering (SERS) signal enhancement and reproducibility, making them potential candidates for SERS-based biomolecule sensing. This technique is an efficient method to fabricate nanosized isotope-enriched structures of characteristic properties by carefully tuning laser parameters at ambient conditions.

11.
Indian J Otolaryngol Head Neck Surg ; 76(2): 1755-1758, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38566744

RESUMEN

Peritonsillar abscess is a polymicrobial infection with acute life threatening complications if not treated promptly. Primary objective is to find the anatomical factor for unilateral abscess formation and appropriate management protocols. Secondary objectives include the bacteriological study,antibiotic preference and comparison of crypt length of both tonsils post tonsillectomy to look for any significant association. A prospective study was carried out for one year in patients with peritonsillitis or peritonsillar abscess attending the Department of ENT in our hospital. Acute cases were treated by incision and drainage followed by IV antibiotics after taking pus or throat swab for culture and sensitivity. Patients further planned for interval tonsillectomy after 6 weeks followed by histopathological examination to compare the infected side and normal side. Crypt length measurements done to see any disparity which would have lead to the development of peritonsillar abscess unilaterally. In patients with peritonsillitis or peritonsillar abscess, histopathological examination of tonsils after interval tonsillectomy showed that risk of peritonsillitis or peritonsillar abscess were more on the tonsil with larger crypt length with more preponderance on left side and in males. This study concludes that deeper the crypt length,male sex, history of recurrent tonsillitis are main risk factors for development of peritonsillar abscess. Bacteriology showed Staphylococcus aureus against the most common Streptococcus Sp. Hence prompt use of antibiotics help in early recovery and reducing complications.

12.
Int J Biol Macromol ; 274(Pt 1): 133329, 2024 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-38908640

RESUMEN

Neoterically, food packaging systems designed solely for prolonging shelf life or monitoring freshness could not fulfil the dynamic demands of consumers. In this current investigation, using the solvent casting method, a versatile halochromic indicator was created by integrating black currant anthocyanin and cinnamon essential oil-loaded Pickering emulsion into a starch/gelatin matrix. The resulting indicator film underwent scrutiny for its structural, pH-sensitive, antioxidant, and antimicrobial attributes. Unexpectedly, the amalgamation of anthocyanin and essential oil led to decreased antioxidant activity, dropping from 73.23 ± 2.17 to 28.87 ± 2.50 mg Trolox equivalent/g sample. Additionally, no discernible antimicrobial properties were detected in the composite film sample against both Staphylococcus aureus and Escherichia coli. Fourier transform infrared analyses unveiled robust intermolecular interactions among the film-forming components, providing insights into the observed antagonistic effect. The indicator film displayed distinctive colour changes corresponding to the fresh (greyish-brown), onset of decomposition (khaki), and spoiled (dark green) stages of the stored fish sample. This highlights its promising potential for providing real-time indications of food spoilage. These findings are important for the efficient design of composite films incorporating anthocyanins and essential oils. They serve as a guide towards their potential use as multifunctional packaging materials in the food industry.

13.
Environ Sci Pollut Res Int ; 31(14): 20983-20998, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38381290

RESUMEN

This work investigates the photocatalytic performance of V2O5 and V3O7 nanoparticles and their nanocomposites with rGO. The as-annealed V2O5 and V3O7 nanoparticles exhibited pure orthorhombic and monoclinic structures with an optical bandgap of 2.3 and 2.5 eV, respectively. The corresponding vibrational modes using Raman and FTIR spectroscopy analysis further confirm the form. The morphological studies reveal that V2O5 and V3O7 nanoparticles possess plate and petal-like morphology, respectively. Moreover, in the case of V2O5/V3O7-rGO nanocomposites, the plate/petal-like nanoparticles are embedded within rGO sheets. Incorporating nanoparticles within rGO sheets has quenched the green photoluminescence emission, enhancing their photocatalytic performance upon irradiation with white light of 100 mW/cm2. This is ascribed to the effective transport of interfacial electrons from vanadium oxide nanoparticles to the rGO surface, reducing the recombination of photogenerated charge carriers. These results indicate that the vanadium oxide/rGO nanocomposites have potential applications in wastewater treatment.


Asunto(s)
Grafito , Azul de Metileno , Nanocompuestos , Azul de Metileno/química , Vanadio , Catálisis , Óxidos/química , Nanocompuestos/química
14.
Ultrason Sonochem ; 105: 106849, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38513544

RESUMEN

Hydrodynamic cavitation (HC), a promising technology for enhancing processes, has shown distinct effectiveness and versatility in various chemical and environmental applications. The recently developed advanced rotational hydrodynamic cavitation reactors (ARHCRs), employing cavitation generation units (CGUs) to induce cavitation, have demonstrated greater suitability for industrial-scale applications than conventional devices. However, the intricate interplay between vortex and cavitation, along with its spatial-temporal evolution in the complex flow field of ARHCRs, remains inadequately elucidated. This study investigated the interaction mechanism between cavitation and vortex in a representative interaction-type ARHCR for the first time using the "simplified flow field strategy" and the Q-criterion. The findings reveal that the flow instability caused by CGUs leads to intricate helical and vortex flows, subsequently giving rise to both sheet and vortex cavitation. Subsequently, utilizing the Q-criterion, the vortex structures are identified to be concentrated inside and at CGU edges with evolution process of mergence and separation. These vortex structures directly influence the shape and dimensions of cavities, establishing a complex interaction with cavitation. Lastly, the vorticity transport equation analysis uncovered that the stretching and dilatation terms dominate the vorticity transport process. Simultaneously, the baroclinic term focuses on the vapor-liquid interface, characterized by significant alterations in density and pressure gradients. These findings contribute to a better comprehension of the cavitation-vortex interaction in ARHCRs.

15.
Cureus ; 16(2): e54581, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38523922

RESUMEN

BACKGROUND:  The development of computerized aids for dental education offers potential benefits in teaching complex procedures, such as the design of removable partial dentures (RPDs). This study aimed to assess the efficacy of a novel computerized tool in enhancing the ability of both dental students and practicing dentists to design RPDs, as well as to evaluate its utility as an interactive educational instrument. METHODS:  A cohort comprising a total of 75 individuals (25 practicing dentists and 50 undergraduate dental students) was enlisted. Participants were introduced to an online interactive application tailored for the design of RPDs. They were tasked with resolving clinical scenarios that necessitated the formulation of an RPD. Throughout the exercise, users were provided with hints addressing errors made during the process, fostering self-directed learning for improved RPD design. Post-interaction, the perceptions of both dentists and students regarding the tool were gauged through a comprehensive questionnaire. RESULTS:  The deployment of the online interactive application demonstrated significant promise in the effective design of RPDs, facilitated by self-directed learning. It also appeared to enhance the proficiency of practicing dentists in formulating partial dentures. CONCLUSION:  The computerized aid evaluated in this study provided an effective platform for both dental education and practice. It not only supported self-directed learning in the design of RPDs but also improved the efficiency of professional dentists in their clinical design work.

16.
Ultrason Sonochem ; 108: 106966, 2024 Jun 22.
Artículo en Inglés | MEDLINE | ID: mdl-38924854

RESUMEN

In recent years, researchers have increasingly focused on the development of multiphase trimetallic nanocomposites (TMNC) incorporating ternary metals or metal oxides, which hold significant potential as alternatives for combatting biofilms and bacterial infections. Enhanced oral health is ensured by the innovative techniques used to effectively prevent bacterial adherence and formation of biofilm on dental sutures. In this investigation, TMNC, which consists of Pb, Ag, and Cu, was synthesized using an autoclave-assisted sonochemical technique. Following synthesis, TMNC were characterized using FTIR, XRD, BET, XPS, TGA, and Raman spectroscopy to analyze their shape and microstructure. Subsequent evaluations, including MTT assay, antibacterial activity testing, and biofilm formation analysis, were conducted to assess the efficiency of the synthesized TMNC. Cytotoxicity and anti-human oral squamous cell carcinoma activities of TMNC were evaluated using the Human Oral Cancer cell line (KB) cell line through MTT assay, demonstrating a dose-dependent increase in anti-human oral squamous cell carcinoma activity against the KB cell line compared to the normal cell line, resulting in notably high cell viability. Furthermore, an ultrasonic probe was employed to incorporate TMNC onto dental suturing threads, with different concentrations of TMNC, ultrasonic power levels, and durations considered to determine optimal embedding conditions that result in the highest antibacterial activity. The inhibitory effects of TMNC, both in well diffusion assays and when incorporated into dental suturing threads, against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria on Mueller-Hinton agar (MHA) were assessed using various concentrations of TMNC. The results of the study indicated that the efficacy of TMNC in inhibiting bacterial growth on dental suturing threads remained impressive, even at low concentrations. Moreover, an evaluation of their potential to destabilize biofilms formed by S. aureus and E. coli, the two pathogens in humans, indicated that TMNC would be a promising anti-biofilm agent.

17.
Ultrason Sonochem ; 108: 106964, 2024 Jun 22.
Artículo en Inglés | MEDLINE | ID: mdl-38943849

RESUMEN

Hydrodynamic cavitation (HC) has emerged as a promising technology for water disinfection. Interestingly, when subjected to specific cavitation pressures, jet pump cavitation reactors (JPCRs) exhibit effective water treatment capabilities. This study investigated the cavitation flow and vorticty transport in a JPCR with various area ratios by utilizing computational fluid dynamics. The results reveal that cavitation is more likely to occur within the JPCR as the area ratio becomes smaller. While as the area ratio decreases, the limit flow ratio also decreases, leading to a reduced operational range for the JPCR. During the cavitation inception stage, only a few bubbles with limited travel distances are generated at the throat inlet. A stable cavitation layer developed between the throat and downstream wall during the limited cavitation stage. In this phase, the primary flow carried the bubbles towards the outlet. In addition, it was found that the vortex stretching, compression expansion, and baroclinic torque terms primarily influence the vorticity transport equation in this context. This work may provide a reference value to the design of JPCRs for water treatment.

18.
Ultrason Sonochem ; 106: 106898, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38749103

RESUMEN

Nanocellulose (CNF) has emerged as a promising alternative to synthetic petroleum-based polymers, but the conventional preparation process involves multiple tedious steps, heavily dependent on chemical input, and proves cost-inefficient. This study presented an, in situ ultrasound-assisted extraction using deep eutectic solvent (DES) based on choline chloride and oxalic acid for more facile production of CNF from raw durian husk fibers. FESEM analysis confirmed the successful extraction of web-like nanofibril structure with width size ranging from 18 to 26 nm. Chemical composition analysis and FTIR revealed the selective removal of lignin and hemicellulose from the raw fiber. As compared to post-ultrasound treatment, in situ ultrasound-assisted extraction consistently outperforms, yielding a higher CNF yield with finer fiber width and significantly reduced lignin content. Integrating this eco-friendly in situ ultrasonication-assisted one-pot extraction method with a 7.5 min interval yielded the highest CNF yield of 58.22 % with minimal lignin content. The superior delignification ability achieved through the proposed in situ ultrasound-assisted protocol surpasses the individual efficacy of DES and ultrasonication processes, neither of which yielded CNF in our experimental setup. This single-step fabrication process significantly reduces chemical usage and streamlines the production steps yielding web-structured CNF that is ideal for sustainable application in membrane and separator.

19.
Pharm Dev Technol ; 18(3): 591-9, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-22149945

RESUMEN

In the present study, we investigate the mucoadhesive characteristics and release of the anticancer agent curcumin, contained in chitosan nanoparticles (CS-NPs). Such a system has potential therapeutic benefits in the treatment of colon cancer through prolonged retention and delivery. The CS-NPs were ionically gelled with tripolyphosphate (TPP) and registered an isoelectric pH of 6.2 (z-average diameter of 214 nm ± 1.0 nm). pH variations around the isoelectric point caused a reduction in CS-NPs electrical charge which correspondingly increased the z-average due to agglomeration. Curcumin release from CS-NPs was slowest at chitosan to TPP weight ratio of 3:1, with a significant retention (36%) at the end of 6 h. Adsorption isotherms of mucin on CS-NPs fitted both the Freundlich and Langmuir models, suggesting a monolayer-limited adsorption on heterogeneous sites with varied affinities. Encapsulated curcumin exerted an influence on the adsorption of mucin due to H-bonding as well as π-π interactions between the phenolic moieties of curcumin and mucin.


Asunto(s)
Adhesivos/síntesis química , Quitosano/administración & dosificación , Colon , Curcumina/administración & dosificación , Sistemas de Liberación de Medicamentos/métodos , Adhesivos/administración & dosificación , Animales , Quitosano/síntesis química , Colon/efectos de los fármacos , Curcumina/síntesis química , Portadores de Fármacos/administración & dosificación , Portadores de Fármacos/síntesis química , Mucosa Intestinal/efectos de los fármacos , Nanopartículas/administración & dosificación , Nanopartículas/química , Tamaño de la Partícula , Porcinos
20.
ACS Omega ; 8(39): 36162-36170, 2023 Oct 03.
Artículo en Inglés | MEDLINE | ID: mdl-37810658

RESUMEN

This study optimized biodiesel synthesis from Pangasius fat using a Box-Behnken experimental design. The manipulation of key variables included the CoFe2O4 catalyst dosage, the methanol-to-fat molar ratio, and the ultrasonic wave amplitude. We determined optimal conditions for biodiesel synthesis through the central runs, resulting in a remarkable 96.5% yield. The produced biodiesel exhibited diverse fatty acid compositions and met specifications for viscosity, specific gravity, acid value, and iodine value. Furthermore, we conducted a comprehensive life cycle assessment (LCA) to shed light on the environmental implications of the process. The LCA revealed a minimal global warming potential of 0.21 kg CO2 per kg of biodiesel produced, demonstrating the environmental viability of the entire process. These significant findings highlight the promising potential of using Pangasius fat as a sustainable feedstock for biodiesel production. Additionally, they provide valuable insights into developing ecologically friendly energy sources.

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