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1.
Data Brief ; 56: 110823, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39281017

RESUMEN

The dataset aims to map scientific publications in the field of school-based management visually at the global level indexed by Scopus using Bibliometric analysis. It focuses on articles on School-Based Management at the international level. Research data were obtained from the Scopus database from 1984 to 2023 through the publish or perish software. Then the paper will be analyzed using the VOS viewer application for viewing and creating the desired Bibliometric maps. There is a sharp increase in the number of studies on this topic, especially from 2018 to 2022 and mainly from research in the US, Hong Kong, Australia, and developed countries. Moreover, the issues of most interest are SBM in terms of student achievement, schools, Hongkong, leadership, autonomy, school autonomy, governance, school effectiveness, school improvement, school reform, decentralization, education reform, education policy, decision-making, adolescent, article, human, humans, school health services, primary education. Policymakers and scholars can find great authors, research centers, influential studies and frequently published journals on this topic to read and research. Further studies based on the combination of bibliometric analysis with other methods may help paint a more profound picture of research findings on this topic.

2.
Chem Biodivers ; : e202400896, 2024 Jun 22.
Artículo en Inglés | MEDLINE | ID: mdl-39140809

RESUMEN

This study investigates Symplocos cochinchinensis (Lour.) S. Moore leaves and stems, commonly known as Symplocos, a plant indigenous to Asia renowned for its traditional use in holistic medicine. A comprehensive phytochemical analysis of S. cochinchinensis led to the isolation of two new lignans, namely symplolignans A and B (1 and 2) along with eleven known lignan glucosides: nortrachelogenin 4-O-ß-D-glucopyranoside (3), nortracheloside (4), matairesinol 4-O-ß-D-glucopyranoside (5), lariciresinol 4'-O-ß-D-glucopyranoside (6), balanophonin 4-O-ß-D-glucopyranoside (7), dehydrodiconiferyl alcohol 4-O-ß-D-glucopyranoside (8), dehydrodiconiferyl alcohol γ'-O-ß-D-glucopyranoside (9), 3-(ß-D-glucopyranosyloxymethyl)-2-(4-hydroxy-3-methoxyphenyl)-5-(3-hydroxypropyl)-7-methoxy-(2R,3S)-dihydrobenzofura (10), and pinoresinol 4'-O-ß-D-glucopyranoside (11). Their chemical structures were elucidated using 1D- and 2D-NMR, mass spectrometry, and their spectroscopic data were compared with those reported in literatures. Furthermore, all compounds were evaluated for their hepatoprotective effects using the Resazurin reduction assay in HepG2 hepatocellular carcinoma cells. Compounds 1, 5, 7, and 8 exhibited notable hepatoprotective efficacy, with cell viability ranging from 105.0±2.6 to 109.2±3.3 at a concentration of 10 µM. This research highlights the therapeutic potential of these compounds and enhanced to the understanding of lignans and neolignans in liver cell proliferation.

3.
Eur J Pharmacol ; 980: 176836, 2024 Oct 05.
Artículo en Inglés | MEDLINE | ID: mdl-39032762

RESUMEN

Dysregulated host response against infection triggers sepsis that leads to multiple organ dysfunction due to uncontrolled inflammatory responses. Despite marked progress in understanding of sepsis, numerous clinical trials for treatment of sepsis have proven daunting and a new therapeutic approach is highly needed. CE9A215 (inotodiol), a fungal secondary metabolite, has been researched for its pharmacological activities and has shown potent anti-allergic effects. In this study, we evaluated the anti-inflammatory activities of CE9A215 upon lipopolysaccharide (LPS) stimulation in vivo and in vitro for the first time. CE9A215 decreased the production of interleukin (IL)-6, tumor necrosis factor alpha (TNF-α), and IL-1ß in a concentration-dependent manner in LPS-stimulated RAW264.7 cells. Intriguingly, in human mast cell line LUVA, CE9A215 significantly lowered IL-4 and IL-10, and this effect could be beneficial for the clearance of bacterial infection. In addition, administration of CE9A215 improved the survival rate of LPS-stimulated mice and inhibited the pro-inflammatory cytokines, IL-6, TNF-α, and IL-1ß in blood. Moreover, CE9A215 enhanced the expression levels of plasma phospholipid transfer protein (PLTP), apolipoprotein E (ApoE), and ATP-binding cassette transporter (ABCA1) in LPS-stimulated RAW246.7 cells. Liver PLTP level increased significantly in the CE9A215-administered group compared with the control group, which implies that CE9A215 promotes LPS clearance and neutralization by reverse transport of LPS by increasing the expressions of PLTP, ApoE, and ABCA1. Our results highlight CE9A215's potential as a novel therapeutic option for the treatment of sepsis.


Asunto(s)
Transportador 1 de Casete de Unión a ATP , Citocinas , Lipopolisacáridos , Sepsis , Animales , Sepsis/tratamiento farmacológico , Sepsis/metabolismo , Sepsis/inducido químicamente , Ratones , Humanos , Células RAW 264.7 , Transportador 1 de Casete de Unión a ATP/metabolismo , Citocinas/metabolismo , Masculino , Antiinflamatorios/farmacología , Antiinflamatorios/uso terapéutico , Lanosterol/análogos & derivados , Lanosterol/farmacología , Lanosterol/uso terapéutico , Mastocitos/efectos de los fármacos , Mastocitos/metabolismo , Mastocitos/inmunología
6.
Fitoterapia ; 177: 106056, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38851515

RESUMEN

Four new acylated oleanane-type triterpene saponins, symplosaponins A-D (1-4) were successfully isolated from the leaves of Symplocos cochinchinensis (Lour.) S. Moore, alongside with five known compounds (5-9), 2-methoxy-4-prop-1-enylphenyl-1-O-ß-D-apiofuranosyl-(1 â†’ 6)-ß-D-glucopyranoside (5), and 1-[O-ß-d-xylopyranosyl-(1 â†’ 6)-O-ß-d-glucopyranosyl]-2,6-dimethoxy-4-propenyl-phenol (6), 6-O-p-coumaroylsucrose (7), arillatose B (8), and (-)-secoisolariciresinol-O-ß-D-glucopyranoside (9). The structures of these compounds were elucidated through spectroscopic methods, comparison with existing data, and chemical methods. Furthermore, all compounds were assessed for their impact on hepatocellular viability using the Resazurin reduction assay. These investigations aimed to explore the potential hepatoprotective properties of isolated compounds. As a result, 1-[O-ß-d-xylopyranosyl-(1 â†’ 6)-O-ß-d-glucopyranosyl]-2,6-dimethoxy-4-propenyl-phenol (6) and (-)-secoisolariciresinol-O-ß-D-glucopyranoside (9) demonstrated statistically significant hepatoprotective activity in a concentration-dependent manner.


Asunto(s)
Ácido Oleanólico , Fitoquímicos , Hojas de la Planta , Saponinas , Saponinas/farmacología , Saponinas/aislamiento & purificación , Saponinas/química , Estructura Molecular , Humanos , Hojas de la Planta/química , Ácido Oleanólico/farmacología , Ácido Oleanólico/análogos & derivados , Ácido Oleanólico/aislamiento & purificación , Ácido Oleanólico/química , Fitoquímicos/farmacología , Fitoquímicos/aislamiento & purificación , Animales , Células Hep G2 , Ratas , Sustancias Protectoras/farmacología , Sustancias Protectoras/aislamiento & purificación , Triterpenos/farmacología , Triterpenos/aislamiento & purificación , Triterpenos/química
7.
J Comput Chem ; 45(26): 2232-2241, 2024 Oct 05.
Artículo en Inglés | MEDLINE | ID: mdl-38831461

RESUMEN

Oxazine dyes act as reporters of their near environment by the response of their fluorescence spectra. At the same time, their fluorescence spectra exhibit a pronounced vibrational progression. In this work, we computationally investigate the impact of near-environment models consisting of aggregated water as well as betaine molecules on the vibrational profile of fluorescence spectra of different oxazine derivatives. For aggregated betaine and a water molecule located above the plane of the dyes, we observe a distinct modification of the vibrational profile, which is more pronounced than the effect of a continuum description of a solvent environment. Our analysis shows that this effect cannot be explained by a pure change in the electronic structure, but that also vibrational degrees of freedom of the environment can be decisive for the vibrational profile and should, hence, not generally be neglected.

8.
Food Chem ; 455: 139858, 2024 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-38850981

RESUMEN

This study aimed to conduct a comparative analysis of germinated seeds and microgreens derived from Perilla frutescens var. crispa f. viridis, hypothesizing that microgreens would exhibit higher concentrations of nutrients and bioactive compounds compared to their precursors. Perilla frutescens was chosen for its popularity and wide use in Asian cuisine. A series of analytical methods was employed to quantify and qualify various components. The findings indicate that germinated seeds exhibit significantly higher quantities of lipids, proteins, sugars, free amino acids, and minerals, whereas microgreens possess significantly high concentration of vitamins and polyphenols. These results provide valuable insights into the nutritional differences between germinated seeds and microgreens, highlighting their distinct contributions to diet. Specifically, incorporating germinated seeds can enhance macronutrient intake, while microgreens can boost antioxidant intake. These findings can inform the development of targeted dietary recommendations, promoting the inclusion of both germinated seeds and microgreens to meet specific nutritional needs and improve health outcomes.


Asunto(s)
Germinación , Valor Nutritivo , Perilla frutescens , Semillas , Semillas/química , Semillas/crecimiento & desarrollo , Perilla frutescens/química , Perilla frutescens/crecimiento & desarrollo , Aminoácidos/análisis , Minerales/análisis , Nutrientes/análisis , Nutrientes/metabolismo , Polifenoles/análisis , Polifenoles/química , Lípidos/análisis , Lípidos/química , Proteínas de Plantas/análisis , Proteínas de Plantas/metabolismo , Antioxidantes/química , Antioxidantes/análisis
9.
J Asian Nat Prod Res ; : 1-7, 2024 Jun 13.
Artículo en Inglés | MEDLINE | ID: mdl-38869195

RESUMEN

One new bithiophene derivative, 5-(but-3-en-1-yn-1-yl)-5'-(methoxymethyl)-2,2'-bithiophene (1), along with twelve known compounds, senecioester (2), tiglinsaureester (3), 5-acetoxymethyl-2'-(but-3-en-1-yn-1-yl)-2,5'-bithiophene (4), 5-(4-isovaleroyloxybut-1-ynyl)-2,2'-bithiophene (5), 5-hydroxymethyl-(2,5':2',5'')-terthienyl tiglate (6), 5-hydroxymethyl-(2,5':2',5'')-terthienyl agelate (7), 5- hydroxymethyl-2,5':2',5''-terthiophene dimethylacrylate (8), 5-methoxymethyl-2,2':5',2''-terthiophene (9), α-terthiophene (10), 1,3,8,9-tetrahydroxycoumestan 3-sulfate (11), demethylwedelolactone (12), and wedelolactone (13) were isolated from the methanol extract of aerial parts of Eclipta prostrata (L.) L. All isolated compounds were evaluated for the protective ability on the HepG2 cells. At the concentration of 100 µM, compounds 11-13 showed the highest hepatoprotective effects, with HepG2 cell viability ranging from 38.68% to 48.54%. Bithiophenes showed higher hepatoprotective cell viability than terthiophenes.

10.
Glob Health Action ; 17(1): 2341521, 2024 12 31.
Artículo en Inglés | MEDLINE | ID: mdl-38693861

RESUMEN

BACKGROUND: Gestational diabetes mellitus (GDM) is an abnormal glucose metabolism diagnosed during pregnancy that can have serious adverse consequences for mother and child. GDM is an exceptional health condition, as its management serves not only as treatment but also as prevention, reducing the risk of future diabetes in mother and child. OBJECTIVES: This qualitative study aimed to explore how pregnant women experience and respond to GDM, focusing particularly on the role of the family environment in shaping women's experiences. METHODS: The research was carried out in Vietnam's Thái Bình province in April-May 2023. We conducted in-depth ethnographic interviews with 21 women with GDM, visiting them in their homes. Our theoretical starting point was phenomenological anthropology, and the data were analysed using a thematic analysis approach. RESULTS: At the centre of women's experiences was the contrast between GDM as a biomedical and a social condition. Whereas GDM was biomedically diagnosed and managed in the healthcare system, it was often deemed insignificant or non-existent by family members. This made GDM a biomedically present but socially absent health condition. This paradox posed challenges to women's GDM self-care, placing them in pioneering social positions. CONCLUSIONS: The biomedical presence yet social absence of GDM turned women into pioneers at biomedical, digital, epidemiological, and family frontiers. This article calls for appreciation of pregnant women's pioneering roles and for health systems action to involve women and families in the development of GDM policies and programmes at a time of sweeping global health changes.


Main findings: Vietnamese women's experiences of gestational diabetes were affected by social splits between clinic and home; between biomedical and family worlds.Added knowledge: Gestational diabetes places pregnant women in Northern Vietnam in pioneering roles on biomedical, digital, epidemiological, and family frontiers.Global health impact for policy and action: Pregnant women should be involved in the development of policies and programmes addressing gestational diabetes, with particular attention to the connections between clinical and family worlds.


Asunto(s)
Antropología Cultural , Diabetes Gestacional , Investigación Cualitativa , Humanos , Diabetes Gestacional/psicología , Diabetes Gestacional/epidemiología , Femenino , Embarazo , Vietnam , Adulto , Mujeres Embarazadas/psicología , Entrevistas como Asunto , Adulto Joven , Autocuidado/psicología
11.
Environ Monit Assess ; 196(6): 514, 2024 May 06.
Artículo en Inglés | MEDLINE | ID: mdl-38709331

RESUMEN

Microplastics (MPs, plastic items from 1 µm to 5 mm in size) are present in all environmental compartments. The evaluation of their concentration, fate, and spatial distribution is still a challenge for the scientific community. This concern is just debuting in developing countries, (i.e., Asia, South America, and Africa). This study deals with the MP contamination in the abiotic marine compartments of Northern Vietnam: seawater and intertidal sediments. Four sites located in the intertidal zone or near the coastline in Tonkin Bay, Vietnam were studied. A total of 16 samples (eight for each compartment) were collected in July 2020 (rainy season) and January 2021 (dry season). Anthropogenic particles (total observed fibers and fragments) were found at levels ranging from 3 to 303 particles/m3 in seawater and from 63 to 955 particles/kg dry weight in sediments. Most of these were fibers less than 300-µm long. Higher levels of seawater at the Nam Dinh site were found in the rainy season compared to the dry one. As the river flow was estimated six times higher during the rainy season than during the dry season, these results suggest the river discharge is a potential source of contamination for the coastal zone. The temporal variability was lower for the sediments than for the seawater, suggesting the long-term integration of the anthropogenic particles in this compartment. A small portion of sorted particles were analyzed by µFTIR (8.35%), and this sub-sample was only composed of fragments. Still, fragments were mostly composed of polypropylene (PP, 82%), polyethylene (PE, 9%), and polystyrene (PS, 9%). The fragment size was similar in the two studied compartments, but it was dependent on polymer types since PS fragments (140 ± 17 µm) were smaller than those made of PE (622 ± 123 µm) and PP (869 ± 905 µm). Future works should investigate the smallest fraction of MP (even nanoplastics) as well as find solutions in order to mitigate MP contamination in the marine environment.


Asunto(s)
Bahías , Monitoreo del Ambiente , Sedimentos Geológicos , Microplásticos , Agua de Mar , Contaminantes Químicos del Agua , Vietnam , Agua de Mar/química , Sedimentos Geológicos/química , Contaminantes Químicos del Agua/análisis , Microplásticos/análisis
12.
Chem Biodivers ; 21(7): e202400053, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38646830

RESUMEN

Three new oleanane-type triterpene saponins, named camphanosides A-C (1-3), along with five known compounds, chikusetsusaponin IVa (4), spinasaponin A 28-O-glucoside (5), (-)-epicatechin (6), (-)-epicatechin 3-O-gallate (7), and (-)-epigallocatechin 3-O-gallate (8) were isolated from the leaves Camellia phanii Hakoda & Ninh. Their structures were established by 1D and 2D-NMR and mass spectral analysis and chemical methods. Moreover, compounds 1-5 were also evaluated for α-glucosidase inhibitory activity. Compounds 1-3 exhibited moderate α-glucosidase inhibitory activity with IC50 values of 230.7±18.0, 251.4±22.7, and 421.4±25.6 µM, respectively.


Asunto(s)
Camellia , Inhibidores de Glicósido Hidrolasas , Glicósidos , Ácido Oleanólico , alfa-Glucosidasas , Inhibidores de Glicósido Hidrolasas/farmacología , Inhibidores de Glicósido Hidrolasas/química , Inhibidores de Glicósido Hidrolasas/aislamiento & purificación , Camellia/química , alfa-Glucosidasas/metabolismo , Ácido Oleanólico/química , Ácido Oleanólico/farmacología , Ácido Oleanólico/análogos & derivados , Ácido Oleanólico/aislamiento & purificación , Glicósidos/química , Glicósidos/farmacología , Glicósidos/aislamiento & purificación , Hojas de la Planta/química , Relación Estructura-Actividad , Conformación Molecular , Triterpenos/química , Triterpenos/farmacología , Triterpenos/aislamiento & purificación , Estructura Molecular
13.
Chem Biodivers ; 21(5): e202400302, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38454878

RESUMEN

This study isolated pure compounds from Canna edulis aerial parts and assessed their antiplatelet and anticoagulant potential. Structural elucidation resulted in the identification of two new compounds: caneduloside A (1) and caneduloside B (2), and eleven known compounds: 6'-acetyl-3,6,2'-tri-p-coumaroyl sucrose (3), 6'-acetyl-3,6,2'-triferuloyl sucrose (4), tiliroside (5), afzelin (6), quercitrin (7), 2-hydroxycinnamaldehyde (8), cinnamic acid (9), 3,4-dimethoxycinnamic acid (10), dehydrovomifoliol (11), 4-hydroxy-3,5-dimethoxybenzaldehyde (12), and (S)-(-)-rosmarinic acid (13). Compounds 3, 4, 6-9, 13 were previously reported for antithrombotic properties. Hence, antithrombotic tests were conducted for 1, 2, 5, 10-12. All tested compounds demonstrated a dose-dependent antiaggregatory effect, and 10 and 12 were the most potent for both ADP and collagen activators. Additionally, 10 and 12 showed anticoagulant effects, with prolonged prothrombin time and activated partial thromboplastin time. The new compound 1 displayed antiplatelet and anticoagulant activity, while 2 mildly inhibited platelet aggregation. C. edulis is a potential source for developing antithrombotic agents.


Asunto(s)
Anticoagulantes , Componentes Aéreos de las Plantas , Inhibidores de Agregación Plaquetaria , Sacarosa , Anticoagulantes/farmacología , Anticoagulantes/química , Anticoagulantes/aislamiento & purificación , Inhibidores de Agregación Plaquetaria/farmacología , Inhibidores de Agregación Plaquetaria/química , Inhibidores de Agregación Plaquetaria/aislamiento & purificación , Sacarosa/química , Sacarosa/farmacología , Sacarosa/metabolismo , Componentes Aéreos de las Plantas/química , Componentes Aéreos de las Plantas/metabolismo , Humanos , Ésteres/química , Ésteres/farmacología , Ésteres/aislamiento & purificación , Agregación Plaquetaria/efectos de los fármacos , Myristicaceae/química , Relación Dosis-Respuesta a Droga , Estructura Molecular , Relación Estructura-Actividad , Animales
14.
Environ Sci Technol ; 58(3): 1690-1699, 2024 Jan 23.
Artículo en Inglés | MEDLINE | ID: mdl-38189783

RESUMEN

Monitoring contamination from per- and polyfluoroalkyl substances (PFASs) in water systems impacted by aqueous film-forming foams (AFFFs) typically addresses a few known PFAS groups. Given the diversity of PFASs present in AFFFs, current analytical approaches do not comprehensively address the range of PFASs present in these systems. A suspect-screening and nontarget analysis (NTA) approach was developed and applied to identify novel PFASs in groundwater samples contaminated from historic AFFF use. A total of 88 PFASs were identified in both passive samplers and grab samples, and these were dominated by sulfonate derivatives and sulfonamide-derived precursors. Several ultrashort-chain (USC) PFASs (≤C3) were detected, 11 reported for the first time in Australian groundwater. Several transformation products were identified, including perfluoroalkane sulfonamides (FASAs) and perfluoroalkane sulfinates (PFASis). Two new PFASs were reported (((perfluorohexyl)sulfonyl)sulfamic acid; m/z 477.9068 and (E)-1,1,2,2,3,3,4,5,6,7,8,8,8-tridecafluorooct-6-ene-1-sulfonic acid; m/z 424.9482). This study highlights that several PFASs are overlooked using standard target analysis, and therefore, the potential risk from all PFASs present is likely to be underestimated.


Asunto(s)
Fluorocarburos , Agua Subterránea , Contaminantes Químicos del Agua , Fluorocarburos/análisis , Contaminantes Químicos del Agua/análisis , Australia , Agua
15.
Nat Prod Res ; 38(6): 897-905, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37749889

RESUMEN

Canna indica L. has been traditionally used to treat various diseases. Based on previously reported antithrombotic effect for this plant, two new phenylpropanoid sucrose esters (canindicoside A (1) and canindicoside B (2)) and seven known compounds: nepetoidin B (3), caffeic acid (4), ferulic acid (5), (R)-(+)-rosmarinic acid (6), isorinic acid (7), (S)-(-)-rosmarinic acid (8) and (S)-(-)-rosmarinic acid methyl ester (9) were isolated from the ethyl acetate extract. Compounds were elucidated by NMR and MS spectroscopic methods. The antiplatelet effect was evaluated using turbidimetric method. Anticoagulant activity was examined by measuring activated partial thromboplastine time (APTT), prothrombin time, and thrombine time (TT). It was shown for the first time that both new phenylpropanoid sucrose esters 1 and 2, 7 and 9 displayed dose-dependent antiplatelet effects. 2 and 9 had the highest inhibitory activity on both adenosine diphosphate (ADP)- and collagen-induced platelet aggregation. Moreover, 1, 7 and 9 also exhibited anticoagulant activity. At 0.4 mg/mL, both 1 and 7 prolonged APTT compared to the negative control (p < 0.05), suggesting the possible inhibitory impact on the intrinsic coagulation pathway. Moreover, 9 at 0.4 mg/mL exerted higher TT values than the negative control (p < 0.05). C. indica and its bioactive phytochemicals are potential candidates for development of anti-thrombosis therapy.


Asunto(s)
Inhibidores de Agregación Plaquetaria , Zingiberales , Inhibidores de Agregación Plaquetaria/farmacología , Inhibidores de Agregación Plaquetaria/química , Fibrinolíticos/farmacología , Ésteres/farmacología , Sacarosa/farmacología , Rizoma , Anticoagulantes/farmacología , Anticoagulantes/química
16.
Nat Prod Res ; 38(5): 789-795, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-37086471

RESUMEN

One new indol, N-methoxymethyltryptophol (1), one new phenolic, (2 R)-2-(4-hydroxyphenyl)ethyl 2-hydroxy-3-phenylpropanoate (2) and fifteen known compounds (3-17) were isolated from the methanol extract of the fermentation of marine microalgae Aurantiochytrium sp. SC145. Their structures were elucidated by 1D-, 2D-NMR spectroscopic analysis, HR-ESI-MS, quantum chemical calculation methods and by comparing their NMR data with those reported in the literature. All compounds were evaluated for their antimicrobial activities against microorganisms. Compounds 2, 3 and 11 significantly exhibited antimicrobial activities on all tested Gram-(+), Gram-(-) bacteria and the yeast C. albicans with MIC values ranging from 32 to 256 µg/mL.


Asunto(s)
Antiinfecciosos , Microalgas , Antiinfecciosos/química , Bacterias , Extractos Vegetales/química , Levaduras , Pruebas de Sensibilidad Microbiana , Antibacterianos/farmacología , Antibacterianos/química
17.
Artículo en Inglés | MEDLINE | ID: mdl-38030840

RESUMEN

The present study used CeO2-Co3O4 quantum dots@porous carbon/multiwalled carbon nanotube (CeO2-Co3O4 QDs@PC/MWCNT/GE) composites to modify graphite electrodes to fabricate high-sensitivity electrochemical sensors to detect the presence of oxytetracycline (OTC). The quantum dots were made from waste sugarcane bagasse. The electrochemical analysis demonstrated the superior electrochemical performance of CeO2-Co3O4 QDs@PC/MWCNT/GE, with a peak current density of 1.276 mA/cm2. Electrochemical impedance spectroscopy (EIS) revealed lower impedance values for CeO2-Co3O4 QDs@PC/MWCNT/GE compared to other electrodes, indicating enhanced conductivity. The modified electrode exhibited an enlarged electrochemically active area, with values of 0.602 cm2, almost seven times that of the bare graphite electrode (0.079 cm2). The results showed that the CeO2-Co3O4 QDs@PC/MWCNT/GE had excellent performance for OTC detection, and its linear calibration range was 1.007 × 10-8 to 2.04 × 10-7 M (i.e., 0.005-0.1 ppm) and 1.007 × 10-6 to 1.209 × 10-4 M (i.e., 0.5-60 ppm). The limit of detection and limit of quantification were 1.23 nM (0.61 ppb) and 4.09 nM (2.03 ppb) (S/N = 3), respectively. The electrode demonstrated long-term stability for up to 7 weeks. This method provides a new way to prepare electrochemical sensors for OTC detection.

18.
ACS Omega ; 8(39): 36253-36260, 2023 Oct 03.
Artículo en Inglés | MEDLINE | ID: mdl-37810639

RESUMEN

This paper presents the formation of magnesium aluminate spinel using composite particles prepared via electrostatic adsorption (ESA). Scanning electron microscopy (SEM) images confirmed the presence of Al2O3-MgO composite particles. A mixture of Al2O3 and MgO raw materials was also prepared by using the conventional bead-milling method for comparison. The samples sintered at elevated temperatures were characterized through X-ray diffraction, SEM, and relative density measurements. Additionally, the lattice parameter and strain of the samples were determined using the Nelson-Riley function and the Williamson-Hall equation. A pure spinel phase formed in the ESA-derived sample sintered at 1400 °C, while the MgO structure remained in the conventionally prepared sample sintered at 1600 °C. The densities of samples sintered at 1450 °C or higher exceeded 90%. The lattice strain of the prepared samples was inversely proportional to the sintering temperature, attributed to the formation of large grains at higher temperatures. However, the sample sintered at 1600 °C for 8 h exhibited the highest strain of 0.0074 because the crystals grew in a certain direction.

19.
Pathol Res Pract ; 250: 154819, 2023 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-37748212

RESUMEN

BACKGROUND: Molecular subtypes play an important role in predicting prognosis and guiding treatment for breast cancer. Having a better knowledge of ethnic molecular features is essential. OBJECTIVES: Determining the distribution of various breast cancer molecular subtypes and investigating the relationship between these subtypes and clinicopathological features. METHODS: Retrospective data was collected from Hanoi National Cancer Hospital and Bach Mai Hospital that included 274 women diagnosed with invasive breast cancer between January 2017 and June 2019. Patients were categorized into five subtypes according to the 2015 St. Gallen molecular classification. The variables analyzed were molecular subtypes and tumor-related characteristics. To evaluate the relationship between these subtypes and clinicopathological features, a Chi-squared test and Fisher exact test were performed. RESULTS: The most prominent subtype was Luminal A (33.2%), followed by Luminal B/Her2- (19.7%) and Luminal B/Her2 + (17.5%), then HER2 overexpression (16.4%), whereas triple negative was the least popular subtype (13.1%). Particularly, 33.9% of all patients, including the Luminal B/Her2 + and the HER2 overexpressing groups, were Her2 positive. There was a statistically significant difference between molecular subtypes and histological type (p = 0.01), tumor grade (p < 0.001), but it was independent of age, tumor size, lymph node metastasis, and lymphovascular invasion. CONCLUSIONS: In contrast to the triple negative variant, the Luminal A variant is the most common among Vietnamese women. The rate of positive tests for HER2 was rather high. These subtypes were closely related to tumor grade and histopathological type. Understanding the molecular subtypes and their relation to clinicopathological features helps clinicians with patient treatment, and prognosis. The application of the 2015 St. Gallen molecular classification should be recommended for use in clinical practice.

20.
Biomedicines ; 11(8)2023 Aug 19.
Artículo en Inglés | MEDLINE | ID: mdl-37626806

RESUMEN

Fucoxanthin extracted and purified from Vietnamese Sargassum oligocystum Montagne, 1845 exhibits various biological activities. In this study, the ability of fucoxanthin to inhibit acetylcholinesterase (AChE), the antioxidant activities, and the expression of antioxidant enzymes were investigated. Fucoxanthin isolated from Vietnamese S. oligocystum showed no cytotoxic effects; moreover, it exhibited AChE inhibitory activity (with an IC50 value of 130.12 ± 6.65 µg mL-1) and antioxidant activity (with an IC50 value of 3.42 ± 0.15 mg mL-1). At concentrations of 50 and 100 µg mL-1, fucoxanthin provided protection against amyloid ß-protein fragment 25-35-induced neurotoxicity in a C6 neuronal cell line, and the survival of C6 cells was higher than 81.01% and 80.98%, respectively, compared to the control group (59%). Moreover, antioxidant enzyme activity and quantitative PCR analysis suggested that the neuroprotective effect of fucoxanthin resulted from regulation of the gene expression of antioxidant enzymes (CAT and GPx) and ER pathways (caspase-3 and Bax), as well as the promotion of expression of genes involved in PI3K/Akt signaling (GSK-3ß), autophagy (p62 and ATG5), and the biosynthesis of ACh (VAChT and ChAT). Therefore, fucoxanthin extracted from the seaweed S. oligocystum in Vietnam is a potential feedstock source for the production of health foods that exert neuroprotective effects.

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