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1.
Molecules ; 28(6)2023 Mar 08.
Artigo em Inglês | MEDLINE | ID: mdl-36985459

RESUMO

An innovative form of 2D/0D g-C3N4/CeO2 nanostructure was synthesized using a simple precursor decomposition process. The 2D g-C3N4 directs the growth of 0D CeO2 quantum dots, while also promoting good dispersion of CeO2QDs. This 2D/0D nanostructure shows a capacitance of 202.5 F/g and notable rate capability and stability, outperforming the g-C3N4 electrode, reflecting the state-of-the-art g-C3N4 binary electrodes. The binary combination of materials also enables an asymmetric device (g-C3N4/CeO2QDs//AC) to deliver the highest energy density (9.25 Wh/kg) and power density (900 W/kg). The superior rate capacity and stability endorsed the quantum structural merits of CeO2QDs and layered g-C3N4, which offer more accessible sites for ion transport. These results suggest that the g-C3N4/CeO2QDs nanostructure is a promising electrode material for energy storage devices.

2.
Molecules ; 28(12)2023 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-37375199

RESUMO

Nanoscale ZnO is a vital semiconductor material whose versatility can be enhanced by sensitizing it with metals, especially noble metals, such as gold (Au). ZnO quantum dots were prepared via a simple co-precipitation technique using 2-methoxy ethanol as the solvent and KOH as the pH regulator for hydrolysis. The synthesized ZnO quantum dots were deposited onto glass slides using a simple doctor blade technique. Subsequently, the films were decorated with gold nanoparticles of different sizes using a drop-casting method. The resultant films were characterized via various strategies to obtain structural, optical, morphological, and particle size information. The X-ray diffraction (XRD) reveals the formation of the hexagonal crystal structure of ZnO. Upon Au nanoparticles loading, peaks due to gold are also observed. The optical properties study shows a slight change in the band gap due to Au loading. Nanoscale sizes of particles have been confirmed through electron microscope studies. P.L. studies display blue and blue-green band emissions. The significant degradation efficiency of 90.2% methylene blue (M.B.) was attained in natural pH in 120 min using pure ZnO catalyst while one drop gold-loaded catalysts, ZnO: Au 5 nm, ZnO: Au 7 nm, ZnO: Au 10 nm and ZnO: Au 15 nm, delivered M.B. degradation efficiency of 74.5% (in 245 min), 63.8% (240 min), 49.6% (240 min) and 34.0% (170 min) in natural pH, respectively. Such films can be helpful in conventional catalysis, photocatalysis, gas sensing, biosensing, and photoactive applications.

3.
Molecules ; 27(9)2022 Apr 30.
Artigo em Inglês | MEDLINE | ID: mdl-35566224

RESUMO

Isopropyl Isothiocyanate (IPI) is a poorly water-soluble drug used in different biological activities. So, the present work was designed to prepare and evaluate IPI loaded vesicles and evaluated for vesicle size, polydispersity index (PDI) and zeta potential, encapsulation efficiency, drug release, and drug permeation. The selected formulation was coated with chitosan and further assessed for the anti-platelet and anti-thrombotic activity. The prepared IPI vesicles (F3) exhibited a vesicle size of 298 nm ± 5.1, the zeta potential of −18.7 mV, encapsulation efficiency of 86.2 ± 5.3% and PDI of 0.33. The chitosan-coated IPI vesicles (F3C) exhibited an increased size of 379 ± 4.5 nm, a positive zeta potential of 23.5 ± 2.8 mV and encapsulation efficiency of 77.3 ± 4.1%. IPI chitosan vesicle (F3C) showed enhanced mucoadhesive property (2.7 folds) and intestinal permeation (~1.8-fold) higher than IPI vesicles (F3). There was a significant (p < 0.05) enhancement in size, muco-adhesion, and permeation flux achieved after coating with chitosan. The IPI chitosan vesicle (F3C) demonstrated an enhanced bleeding time of 525.33 ± 12.43 s, anti-thrombin activity of 59.72 ± 4.21, and inhibition of platelet aggregation 68.64 ± 3.99%, and anti-platelet activity of 99.47%. The results of the study suggest that IPI chitosan vesicles showed promising in vitro results, as well as improved anti-platelet and anti-thrombotic activity compared to pure IPI and IPI vesicles.


Assuntos
Quitosana , Nanopartículas , Portadores de Fármacos , Sistemas de Liberação de Medicamentos , Liberação Controlada de Fármacos , Isotiocianatos , Sistemas de Liberação de Fármacos por Nanopartículas , Tamanho da Partícula
4.
J Pak Med Assoc ; 72(2): 390-392, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-35320205

RESUMO

The objective of the study was to observe the change in Pinch Strength (PS) of arteriovenous fistula (AVF) arm and non-AVF arm before and after haemodialysis (HD). A total of 31 patients (21 Male and 10 Female) undergoing HD during January and February 2020 at a trust hospital were selected through purposive sampling. Mean PS was calculated from the measurements taken using the Jamar digital pinch gauge with an interval of five seconds between each measurement. Paired sample T-test was applied using SPSS 20. The mean PS values for AVF arm when compared before and after the session were 3.64 ±1.01 and 2.87 ±1.20 kgs (p<0.01), whereas for non AVF arm PS values were 3.96 ±1.50 and 3.69 ±1.37 kgs (p=0.09). It was concluded that PS of AVF arm decreased more significantly after HD as compared to the non AVF arm.


Assuntos
Fístula Arteriovenosa , Derivação Arteriovenosa Cirúrgica , Falência Renal Crônica , Feminino , Humanos , Falência Renal Crônica/terapia , Masculino , Força de Pinça , Diálise Renal
5.
Plant Dis ; 104(1): 35-43, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31660799

RESUMO

Wheat head blast (WHB), caused by the fungus Magnaporthe oryzae pathotype triticum, is a devastating disease affecting South America and South Asia. Despite 30 years of intensive effort, the 2NVS translocation from Aegilops ventricosa contains the only useful source of resistance to WHB effective against M. oryzae triticum isolates. The objective of this study was to identify non-2NVS sources of resistance to WHB among elite cultivars, breeding lines, landraces, and wild-relative accessions. Over 780 accessions were evaluated under field and greenhouse conditions in Bolivia, greenhouse conditions in Brazil, and at two biosafety level-3 laboratories in the United States. The M. oryzae triticum isolates B-71 (2012), 008 (2015), and 16MoT001 (2016) were used for controlled experiments, while isolate 008 was used for field experiments. Resistant and susceptible checks were included in all experiments. Under field conditions, susceptible spreaders were inoculated at the tillering stage to guarantee sufficient inoculum. Disease incidence and severity were evaluated as the average rating for each 1-m-row plot. Under controlled conditions, heads were inoculated after full emergence and individually rated for percentage of diseased spikelets. The diagnostic marker Ventriup-LN2 was used to test for the presence of the 2NVS translocation. Four non-2NVS spring wheat International Maize and Wheat Improvement Center breeding lines (CM22, CM49, CM52, and CM61) and four wheat wild-relatives (A. tauschii TA10142, TA1624, TA1667, and TA10140) were identified as resistant (<5% of severity) or moderately resistant (5 to <25% severity) to WHB. Experiments conducted at the seedling stage showed little correlation with disease severity at the head stage. M. oryzae triticum isolate 16MoT001 was significantly more aggressive against 2NVS-based varieties. The low frequency of WHB resistance and the increase in aggressiveness of newer M. oryzae triticum isolates highlight the threat that the disease poses to wheat production worldwide and the urgent need to identify and characterize new resistance genes that can be used in breeding for durably resistant varieties.


Assuntos
Resistência à Doença , Triticum , Ásia , Bolívia , Brasil , Cruzamento , Resistência à Doença/genética , Doenças das Plantas/microbiologia , Triticum/genética , Triticum/microbiologia
6.
Saudi Pharm J ; 28(1): 25-32, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31920430

RESUMO

Chitosan derivatives are reported as anticoagulants in the literature. This work was undertaken to develop novel chitosan derivatives as anticoagulants. The sulfonated derivatives of chitosan were formed by the reaction of chitosan derivatives with chlorosulfonic acid in N,N-dimethylformamide. The structures of these derivatives were established by FTIR and 1H NMR spectra. The prepared derivatives were evaluated for their in vivo anticoagulant effects by the tail bleeding method in Wistar rats utilizing nicoumalone as a standard drug. The results revealed that the sulfonation of the chitosan increases its anticoagulant activity. The developed compounds exhibited faster onset of action and potency than nicoumalone after one hour of the drug administration. The sulphated N-alkyl derivatives of chitosan were more potent anticoagulants than sulfated quaternary derivatives/sulfated chitosan. It is also suggested to develop analogs of Ethyl chitosan sulfate (4b) and Benzyl chitosan sulfate (4c), which may provide some more fruitful anticoagulants having faster onset of action as well as longer duration of action and possessing a balanced hydrophilic/lipophilic character.

7.
Cytokine ; 118: 130-143, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-29625858

RESUMO

Oncostatin M (OSM), an inflammatory cytokine belonging to the interleukin-6 (IL-6) superfamily, plays a vital role in multitude of physiological and pathological processes. Its role in breast tumor progression and metastasis to distant organs is well documented. Recent reports implicate OSM in macrophage M2 polarization, a key pro-tumoral phenomenon. M2 polarization of macrophages is believed to promote tumor progression by potentiating metastasis and angiogenesis. In the current study, we delineated the mechanism underlying OSM induced macrophage M2 polarization. The findings revealed that OSM skews macrophages towards an M2 polarized phenotype via mTOR signaling complex 2 (mTORC2). mTORC2 relays signals through two effector kinases i.e. PKC-α and Akt. Our results indicated that mTORC2 mediated M2 polarization of macrophages is not dependent on PKC-α and is primarily affected via Akt, particularly Akt1. In vivo studies conducted on 4T1/BALB/c mouse orthotropic model of breast cancer further corroborated these observations wherein i.v. reintroduction of mTORC2 abrogated monocytes into orthotropic mouse model resulted in diminished acquisition of M2 specific attributes by tumor associated macrophages. Metastasis to distant organs like lung, liver and bone was reduced as evident by decrease in formation of focal metastatic lesions in mTORC2 abrogated monocytes mice. Our study pinpoints key role of mTORC2-Akt1 axis in OSM induced macrophage polarization and suggests for possible usage of Oncostatin-M blockade and/or selective mTORC2 inhibition as a potential anti-cancer strategy particularly with reference to metastasis of breast cancer to distant organs such as lung, liver and bone.


Assuntos
Proliferação de Células/efeitos dos fármacos , Macrófagos/efeitos dos fármacos , Alvo Mecanístico do Complexo 2 de Rapamicina/metabolismo , Metástase Neoplásica/tratamento farmacológico , Oncostatina M/farmacologia , Microambiente Tumoral/efeitos dos fármacos , Animais , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/metabolismo , Neoplasias da Mama/patologia , Linhagem Celular Tumoral , Feminino , Humanos , Interleucina-6/metabolismo , Células MCF-7 , Ativação de Macrófagos/efeitos dos fármacos , Macrófagos/metabolismo , Camundongos Endogâmicos BALB C , Metástase Neoplásica/patologia , Neovascularização Patológica/tratamento farmacológico , Neovascularização Patológica/metabolismo , Neovascularização Patológica/patologia , Proteínas Proto-Oncogênicas c-akt/metabolismo , Transdução de Sinais/efeitos dos fármacos , Células THP-1
8.
BMC Cancer ; 19(1): 1236, 2019 Dec 19.
Artigo em Inglês | MEDLINE | ID: mdl-31856761

RESUMO

BACKGROUND: The mechanistic (or mammalian) target of rapamycin (mTOR), a Ser/Thr kinase, associates with different subunits forming two functionally distinct complexes, mTORC1 and mTORC2, regulating a diverse set of cellular functions in response to growth factors, cellular energy levels, and nutrients. The mechanisms regulating mTORC1 activity are well characterized; regulation of mTORC2 activity, however, remains obscure. While studies conducted in Dictyostelium suggest a possible role of Ras protein as a potential upstream regulator of mTORC2, definitive studies delineating the underlying molecular mechanisms, particularly in mammalian cells, are still lacking. METHODS: Protein levels were measured by Western blotting and kinase activity of mTORC2 was analyzed by in vitro kinase assay. In situ Proximity ligation assay (PLA) and co-immunoprecipitation assay was performed to detect protein-protein interaction. Protein localization was investigated by immunofluorescence and subcellular fractionation while cellular function of mTORC2 was assessed by assaying extent of cell migration and invasion. RESULTS: Here, we present experimental evidence in support of the role of Ras activation as an upstream regulatory switch governing mTORC2 signaling in mammalian cancer cells. We report that active Ras through its interaction with mSIN1 accounts for mTORC2 activation, while disruption of this interaction by genetic means or via peptide-based competitive hindrance, impedes mTORC2 signaling. CONCLUSIONS: Our study defines the regulatory role played by Ras during mTORC2 signaling in mammalian cells and highlights the importance of Ras-mSIN1 interaction in the assembly of functionally intact mTORC2.


Assuntos
Alvo Mecanístico do Complexo 2 de Rapamicina/metabolismo , Proteínas Monoméricas de Ligação ao GTP/metabolismo , Neoplasias/metabolismo , Proteínas ras/metabolismo , Linhagem Celular Tumoral , Movimento Celular/fisiologia , Proliferação de Células/fisiologia , Humanos , Lipoma/genética , Lipoma/metabolismo , Lipoma/patologia , Células MCF-7 , Mutação , Neoplasias/genética , Neoplasias/patologia , Células PC-3 , Transdução de Sinais , Superóxidos/metabolismo , Regulação para Cima , Proteínas ras/genética
9.
Biochem Biophys Res Commun ; 503(2): 677-683, 2018 09 05.
Artigo em Inglês | MEDLINE | ID: mdl-29908185

RESUMO

Breast cancer is most frequently diagnosed cancer and fifth leading cause of death in women. About 20-30% of all breast cancers overexpress HER2/neu receptors. Lapatinib is a dual tyrosin kinase inhibitor of EGFR and HER2. It exhibits its anticancer effect via blocking intracellular domain of HER2 receptor in breast cancer. Lapatinib belongs to class II of BSC classification due to its poor solubility restricting its clinical application. Due to presence of HER2 receptor on cardiomyocytes, it is associated with generation of cardiotoxicity. The present study was aimed to design a PEGylated liposomal formulation of Lapatinib and evaluate its anticancer potential. Lapatinib liposomes were prepared using lipid layer hydration method and its characterization was done by determining its particle size, zeta potential, entrapment efficiency and in vitro release profiling. The anti-tumor activity of PEGylated liposomal formulation was evaluated in xenografted tumor induced by MDA-MB-453 breast cancer cells in chick embryos. The anti-tumor effect of lapatinib was enhanced by its PEGylated liposomal preparation as it led to the reduction in tumor size to a greater extent compared to the embryos treated with free lapatinib. Flowcytometric analysis and immunoflurescence study using cleaved PARP antibody demonstrated the enhanced apoptotic potential of PEGylated liposomes of lapatinib. SGOT levels, marker for cardiotoxicity and hepatotoxicity, significantly decreased in serum of embryos treated with PEGylated liposomes of lapatinib compared to free drug treated embryos. Hence, the PEGylated liposomal formulation of lapatinib can be used as a therapeutic strategy against HER2 positive breast cancer either alone or in combination with conventional anticancer agents and hormonal therapies.


Assuntos
Antineoplásicos/administração & dosagem , Neoplasias da Mama/tratamento farmacológico , Lapatinib/administração & dosagem , Inibidores de Proteínas Quinases/administração & dosagem , Receptor ErbB-2/antagonistas & inibidores , Animais , Antineoplásicos/farmacologia , Antineoplásicos/uso terapêutico , Antineoplásicos/toxicidade , Apoptose/efeitos dos fármacos , Neoplasias da Mama/metabolismo , Neoplasias da Mama/patologia , Cardiotoxicidade/etiologia , Cardiotoxicidade/prevenção & controle , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Embrião de Galinha , Receptores ErbB/antagonistas & inibidores , Receptores ErbB/metabolismo , Feminino , Humanos , Lapatinib/farmacologia , Lapatinib/uso terapêutico , Lapatinib/toxicidade , Lipossomos/química , Polietilenoglicóis/química , Inibidores de Proteínas Quinases/farmacologia , Inibidores de Proteínas Quinases/uso terapêutico , Inibidores de Proteínas Quinases/toxicidade , Receptor ErbB-2/metabolismo
10.
Acta Chim Slov ; 65(1): 221-230, 2018 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-29562110

RESUMO

Most industrial waste discharges are often contaminated with phenolic compounds, which constitute a major source of water pollution owing to their toxicity and low biodegradability. Development of cost-effective treatment of such industrial wastewater is therefore of paramount importance. Towards this end, we explore the efficacy of Pine bark powder (PBP), which is an agricultural solid waste material, as a low-cost biosorbent without any pre-treatment, for the adsorptive removal of 2,4,6-trichlorophenol (2,4,6-TCP) from aqueous media. The PBP was thoroughly characterized and the effect of important adsorption parameters were examined in the present investigation. The batch equilibrium data were analyzed using well-known isotherm models. Freundlich isotherm model provided the best description of the equilibrium biosorption behavior. At 25 ± 1 °C, the maximum biosorption capacity (qmax) was 289.09 mg/g, which is higher than most biosorbents reported in the literature while the removal as high as 97% was obtained. Moreover, the biosorption process was fast, attaining equilibrium in less than 120 min of contact. The Elovich model accurately described the kinetics data. In view of high biosorption capacity and.

11.
J Pak Med Assoc ; 67(6): 926-928, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28585595

RESUMO

Treatment of chronic hepatitis C (HCV) is difficult in thalassemics due to the haemolytic side effects of therapy. This study evaluated the treatment response to conventional interferon and ribavirin in HCV patients with thalassemia major. It was conducted at PMRC Research Centre, Jinnah Postgraduate Medical Centre (JPMC) Karachi. At baseline complete blood count, liver function tests, serum protein/ albumin, random blood glucose, serum ferritin, TSH, HCV RNA (quantitative) and genotyping were done. Conventional interferon 3 MIU thrice weekly and ribavirin 400 mg daily was given for 24 or 48 weeks. HCV RNA was done at 1st month (RVR), 3rd month (EVR), 6th month (ETR) and six months post treatment sustained virological response (SVR). A total of 17 Anti HCV positive patients, age range 7-28 years were included.HCV RNA was found in 12. Treatment was completed in 8 patients. Genotype 3(87.5%) was found in 7 patients, 1 had genotype 1. RVR was achieved in 5 (62.5%) cases, negative PCR at 3 and 6 months of treatment (EVR) in 7 (87.5%) patients, one patient was non responder. SVR was achieved in 2(25%) patients. Anaemia was the most common side effect due to which transfusion requirements increased in 4(50%) patients.


Assuntos
Anemia/induzido quimicamente , Antivirais/uso terapêutico , Hepatite C Crônica/tratamento farmacológico , Interferons/uso terapêutico , Ribavirina/uso terapêutico , Talassemia beta/complicações , Adolescente , Adulto , Anemia/etiologia , Criança , Quimioterapia Combinada , Feminino , Hepatite C Crônica/sangue , Hepatite C Crônica/complicações , Humanos , Masculino , Projetos Piloto , RNA Viral/sangue , Resposta Viral Sustentada , Adulto Jovem
12.
J Ayub Med Coll Abbottabad ; 29(2): 258-261, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28718243

RESUMO

BACKGROUND: Type-I Tympanoplasty is an operation which is widely done to close a persistent tympanic membrane perforation after clearing the disease from the middle ear. It is very safe and effective procedure. The success rate varies in different setups and there are some confounding factors which affect the result of Type-I tympanoplasty like the size, type and location of perforation. By conducting this study, we aimed to calculate the success rate of Type-I Tympanoplasty in Ayub Teaching Hospital and assess which confounding factors affect the success rate. METHODS: This case series study was conducted at Ayub teaching hospital from 1st January 2014 to 31st December 2015. All the patients who presented with dry ears, no nasal disease and persistent tympanic membrane perforations during this period were operated upon and overall success rate was calculated. In addition, the relationship between the site of perforation, size of perforation and the type of perforation and the success rate of Type-I Tympanoplasty was also calculated. RESULTS: One hundred and thirteen patients were included in this study. Out of these 91 (80.5%) showed complete healing after surgery. Anterior perforations were found to fail the procedure in 41.7% of the cases, while central perforation failed in only 5.4% of the cases. In cases of marginal perforations healing was significantly decreased, i.e., only 47.1% while it was 94.9% in cases where annulus was not involved. Larger perforations also showed poor surgical outcome. 100% of the small perforation healed completely while only 58.3% of the large perforations showed successful result after surgery. When p-value was calculated all of these findings were more than 95% significant. CONCLUSIONS: There is a significant association between the healing of tympanic membrane after Type-I Tympanoplasty and site, size and type of perforation. Anterior perforations, marginal perforation and large perforations reduce the chances of successful outcome of Type-I Tympanoplasty.


Assuntos
Perfuração da Membrana Timpânica/cirurgia , Timpanoplastia , Estudos de Coortes , Humanos , Resultado do Tratamento , Turquia , Timpanoplastia/efeitos adversos , Timpanoplastia/métodos , Timpanoplastia/estatística & dados numéricos
13.
ACS Omega ; 9(14): 15882-15892, 2024 Apr 09.
Artigo em Inglês | MEDLINE | ID: mdl-38617686

RESUMO

In the present study, ZnO nanoparticles were synthesized by using aqueous extracts of Aerva persica roots. Characterization of as-prepared ZnO nanoparticles was carried out using different techniques, including powder X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and BET surface area analysis. Morphological analysis confirmed the small, aggregated flake-shaped morphology of as-synthesized ZnO nanostructures. The as-prepared ZnO nanoparticles were analyzed for their potential application as anti-inflammatory (using in vivo inhibition of carrageenan induced paw edema) and antioxidant (using in vitro radical scavenging activity) agents. The ZnO nanoparticles were found to have a potent antioxidant and anti-inflammatory activity comparable to that of standard ascorbic acid (antioxidant) and indomethacin (anti-inflammatory drug). Therefore, due to their ecofriendly synthesis, nontoxicity, and biocompatible nature, zinc oxide nanoparticles synthesized successfully from roots extract of the plant Aerva persica with potent efficiencies can be utilized for different biomedical applications.

14.
ACS Omega ; 9(6): 6709-6718, 2024 Feb 13.
Artigo em Inglês | MEDLINE | ID: mdl-38371774

RESUMO

Alternative energy sources, such as biodiesel, play a vital role in environmental protection. Waste cooking oil (WCO) biodiesel has promising applications in compression ignition engines. A major problem regarding biodiesel implementation is the deterioration and materials incompatibility of existing fuel system components with biodiesel. Variations in the composition of fuel prompted by the inclusion of biodiesel cause a variety of issues in diesel engine fuel systems where the elastomer is generally utilized as the fuel hose material and sealings. In this experimental work, the effects of the diesel and WCO biodiesel blends (B8, B16, B24, and B100) on Buna-N, ethylene propylene rubber (EPR), and polystyrene (PS) were examined by the immersion test, which was conducted for 160 h at various immersion temperatures of 30, 60, and 80 °C, respectively. The study also showed that the use of elastomer materials like Buna-N, EPR, and PS in diesel engines fueled up to 20% WCO biodiesel blends is advantageous; the overall compatibility improves by 100% compared to that obtained using neat diesel. The outcome revealed remarkable behavior changes, including a minor increase in volume and a slight loss in tensile strength and hardness compared to that observed using neat diesel fuel. The expansion of rubber materials increases over 60 °C, although the rate of this process decreases above 80 °C. It has been found that the expansion of rubber materials is unaffected by the acid concentration of the WCO biodiesel blends but significantly affected by the moisture content.

15.
Artigo em Inglês | MEDLINE | ID: mdl-38830793

RESUMO

AIMS: Transthyretin amyloid cardiomyopathy (ATTR-CM) is characterized by the accumulation of transthyretin (TTR) protein in the myocardium. The aim of this scoping review is to provide a descriptive summary of the clinical trials and observational studies that evaluated the clinical efficacy and safety of various agents used in ATTR-CM, with a goal of identifying the contemporary gaps in literature and to reveal future research opportunities. METHODS AND RESULTS: The search was performed in line with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A literature search using several databases for observational and clinical trials investigating the treatment modalities for ATTR-CM was undertaken. We extracted data including study characteristics, primary endpoints, and adverse events from each study. A total of 19 studies were included in our scoping review. 8 were clinical trials and 11 were observational analyses. The drugs evaluated included tafamadis, acoramidis, revusiran, TUDCA and doxycycline, diflusinil, inotersan, eplontersen, and patisiran. Tafamidis has shown to be efficacious in the management of ATTR-CM, particularly when initiated at earlier stages. RNA interference and antisense oligonucleotide drugs have shown promising impacts on quality of life. Additionally, this review identified gaps in the literature, particularly among long-term outcomes, comparative effectiveness, and the translation of research into economic contexts. CONCLUSIONS: Multiple pharmacological options are potential disease-modifying therapies for ATTR-CM. However, many gaps exist in the understanding of these various drug therapies, warranting further research. The future directions for management of ATTR-CM are promising in regard to improving prognostic implications.

16.
ACS Omega ; 9(1): 741-752, 2024 Jan 09.
Artigo em Inglês | MEDLINE | ID: mdl-38222659

RESUMO

This study investigates the feasibility of hydrogen addition to achieve lower emissions and higher thermal efficiency in an ammonia-biodiesel-fueled reactivity-controlled compression ignition (RCCI) engine. A single-cylinder light-duty water-cooled compression ignition (CI) engine was adapted to run in RCCI combustion with port-injected ammonia and hydrogen as low reactive fuel (LRF) and direct-injected algal biodiesel as high reactive fuel (HRF). In our earlier study, the ammonia substitution ratio (ASR) was optimized as 40%. To optimize fuel and engine settings, hydrogen is added in quantities ranging from 5 to 20% by energy share. The combustion, performance, and emission characteristics were investigated for the trinary fuel operation. The result shows that the 20% hydrogen premixing with 40% ammonia-biodiesel RCCI operation increased the peak cylinder pressure (CP), peak heat release rate (HRR), and cumulative heat release rate (CHRR) by 15.12, 25.15, and 26.68%, respectively. Ignition delay (ID) and combustion duration (CD) were decreased by 15.53 and 11.24%, respectively. The combustion phasing angle was advanced by 4 °CA. The brake thermal efficiency (BTE) was improved by 15.49%, and brake specific energy consumption (BSEC) was reduced by 21.92%. While the nitrogen oxide (NOx) level was significantly increased by about 31.82%, the hydrocarbon (HC), carbon monoxide (CO), smoke, and exhaust gas temperature (EGT) were reduced by 24.53, 28.16, 25.82, and 17.47% as compared to the optimized ASR40% combustion.

17.
Fitoterapia ; 175: 105927, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38548028

RESUMO

STAT3 is a crucial member within a family of seven essential transcription factors. Elevated STAT3 levels have been identified in various cancer types, notably in breast cancer (BC). Consequently, inhibiting STAT3 is recognized as a promising and effective strategy for therapeutic intervention against breast cancer. We herein synthesize a library of isoxazole (PAIs) from piperic acid [2E, 4E)-5-(2H-1,3-Benzodioxol-5-yl) penta-2,4-dienoic acid] on treatment with propargyl bromide followed by oxime under prescribed reaction conditions. Piperic acid was obtained by hydrolysis of piperine extracted from Piper nigrum. First, we checked the binding potential of isoxazole derivatives with breast cancer target proteins by network pharmacology, molecular docking, molecular dynamic (MD) simulation and cytotoxicity analysis as potential anti-breast cancer (BC) agents. The multi-source databases were used to identify possible targets for isoxazole derivatives. A network of protein-protein interactions (PPIs) was generated by obtaining 877 target genes that overlapped gene symbols associated with isoxazole derivatives and BC. Molecular docking and MD modelling demonstrated a strong affinity between isoxazole derivatives and essential target genes. Further, the cell viability studies of isoxazole derivatives on the human breast carcinoma cell lines showed toxicity in all breast cancer cell lines. In summary, our study indicated that the isoxazole derivative showed the significant anticancer activity. The results highlight the prospective utility of isoxazole derivatives as new drug candidates for anticancer chemotherapy, suggesting route for the continued exploration and development of drugs suitable for clinical applications.


Assuntos
Ácidos Graxos Insaturados , Isoxazóis , Simulação de Acoplamento Molecular , Fator de Transcrição STAT3 , Neoplasias de Mama Triplo Negativas , Humanos , Fator de Transcrição STAT3/antagonistas & inibidores , Fator de Transcrição STAT3/metabolismo , Neoplasias de Mama Triplo Negativas/tratamento farmacológico , Isoxazóis/farmacologia , Isoxazóis/química , Linhagem Celular Tumoral , Estrutura Molecular , Ácidos Graxos Insaturados/farmacologia , Ácidos Graxos Insaturados/isolamento & purificação , Ácidos Graxos Insaturados/química , Farmacologia em Rede , Simulação de Dinâmica Molecular , Antineoplásicos Fitogênicos/farmacologia , Antineoplásicos Fitogênicos/isolamento & purificação
18.
Zootaxa ; 3646: 301-35, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-26213768

RESUMO

Ten species of the superfamily Mononchoidea from fourteen populations collected during a survey of terrestrial and freshwater habitats of North India, are described and illustrated. The species include Clarkus papillatus (Bastian, 1865) Jairajpuri, 1970, Prionchulus muscorum (Dujardin, 1845) Wu & Hoeppli, 1929, Mylonchulus contractus Jairajpuri, 1970, M. hawaiiensis (Cassidy, 1931) Andrassy, 1958, M. lacustris (Cobb in Cobb, 1915) Andrdssy, 1958, M. minor (Cobb, 1893) Andrassy, 1958, M. obtusicaudatus (Daday, 1899) AndrAssy, 1958, M. vasis Yeates, 1992, Sporonchulus ibitiensis (Carvalho, 1951) Andrassy, 1958 and S. vagabundus Jairajpuri, 1971. Mylonchulus vasis Yeates, 1992 is reported for the first time from India. The variable, as well as the relatively consistent characters are discussed in different populations to assess their role in the diagnosis of species.


Assuntos
Nematoides/classificação , Animais , Biodiversidade , Feminino , Índia , Masculino , Nematoides/anatomia & histologia
19.
Chemosphere ; 340: 139805, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37586500

RESUMO

Environmental pollution is the greatest challenge of the modern age due to unprecedented industrialization and urbanization that has led to the contamination of water resources with a wide range of pollutants. The release of untreated industrial and municipal wastewater to water bodies further intensifies the problem. The presence of heavy metals and organic contaminants in water poses significant threats to humans, aquatic life, and the environment. Adsorption is one of the famous water treatment technologies due to its simplicity, low cost, efficiency, and minimal secondary pollution. The selection or synthesis of an effective adsorbent is key to the success of the adsorptive removal of pollutants. In this work, we synthesized an adsorbent consisting of a mesoporous hyper-cross-linked polyamide/polyamine 3D network through a single-step Michael addition reaction. The adsorbent was characterized by FTIR, PXRD, TGA, SEM, and TEM to investigate its functional moieties, material nature, thermal, morphological, and internal structural features, respectively. Due to its mesoporous structure, presence of functional groups, and 3D hyper-cross-linked network, it efficiently removed heavy metals (Cd, Cr, and Pb) from aqueous media. The effect of various parameters such as sample pH, adsorbent dosage, contact time, and adsorbate concentrations was thoroughly investigated. The experimental data were analyzed by a variety of isotherm models wherein Langmuir was found to be the best fit for explaining the adsorption of all the metals. The adsorption kinetics was best explained by the pseudo-second-order model. The maximum adsorption capacities for Cd, Cr, and Pb were 60.98 mg g-1, 119 mg g-1, and 9.302 mg g-1, respectively. The synthesized adsorbent was also tested for removal of organic dyes, and it showed selective and fast removal of Eriochrome Black T. Polymeric resins can be promising materials for adsorptive remediation of pollutants in aqueous media.


Assuntos
Metais Pesados , Poluentes Químicos da Água , Humanos , Águas Residuárias , Nylons , Cádmio , Chumbo , Poluentes Químicos da Água/análise , Metais Pesados/química , Corantes , Adsorção , Cinética , Concentração de Íons de Hidrogênio
20.
Ind Eng Chem Res ; 62(15): 6354, 2023 Apr 19.
Artigo em Inglês | MEDLINE | ID: mdl-37097914

RESUMO

[This corrects the article DOI: 10.1021/acs.iecr.2c03384.].

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