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1.
Inorg Chem ; 63(17): 7631-7639, 2024 Apr 29.
Artículo en Inglés | MEDLINE | ID: mdl-38625102

RESUMEN

Two novel MoO42--templated luminescent silver alkynyl nanoclusters with 20-nuclearity ([(MoO42-)@Ag20(C≡CtBu)8(Ph2PO2)7(tfa)2]·(tfa-) (1)) and 18-nuclearity ([(MoO42-)@Ag18(C≡CtBu)8(Ph2PO2)7]·(OH) (2)) (tfa = trifluoroacetate) were synthesized with the green light maximum emissions at 507 and 516 nm, respectively. The nanoclusters were investigated and characterized by single-crystal X-ray crystallography, electrospray ionization mass spectrum (ESI-MS), X-ray photoelectron spectroscopy, thermogravimetry (TG), photoluminescence (PL), ultraviolet-visible (UV-vis) spectroscopy, and density functional theory calculations (DFT). The two nanoclusters differ in their structure by a supplementary [Ag2(tfa)2] organometallic surface motif, which significantly participates in the frontier molecular orbitals of 1, resulting in similar bonding patterns but different optical properties between the two clusters. Indeed, both nanoclusters show strong temperature-dependent photoluminescence properties, which make them potential candidates in the fields of optical devices for further applications.

2.
J Environ Manage ; 351: 119771, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38071920

RESUMEN

Antibiotic resistome could be loaded by bioaerosols and escape from wastewater or sludge to atmosphere environments. However, until recently, their profile, mobility, bacterial hosts, and risks in submicron bioaerosols (PM1.0) remain unclear. Here, metagenomic sequencing and assembly were employed to conduct an investigation of antibiotic resistome associated with PM1.0 within and around a full-scale wastewater treatment plant (WWTP). More subtypes of antibiotic resistant genes (ARGs) with higher total abundance were found along the upwind-downwind-WWTP transect. ARGs in WWTP-PM1.0 were mainly mediated by plasmids and transposases were the most prevalent mobile genetic elements (MGEs) co-occurring with ARGs. A contig-based analysis indicated that very small proportions (15.32%-19.74%) of ARGs in WWTP-PM1.0 were flanked by MGEs. Proteobacteria was the most dominant host of ARGs. A total of 28 kinds of potential pathogens, such as Pseudomonas aeruginosa and Escherichia coli, carried multiple ARG types. Compared to upwind, WWTP and corresponding downwind were characterized by higher PM1.0 resistome risk. This study emphasizes the vital role of WWTPs in discharging PM1.0-loaded ARGs and antibiotic resistant pathogens to air, and indicates the need for active safeguard procedures, such as that employees wear masks and work clothes, covering the main emission sites, and collecting and destroying of bioaerosols.


Asunto(s)
Antibacterianos , Purificación del Agua , Humanos , Antibacterianos/farmacología , Genes Bacterianos , Bacterias/genética , Aguas Residuales
3.
J Am Chem Soc ; 145(50): 27757-27766, 2023 Dec 20.
Artículo en Inglés | MEDLINE | ID: mdl-38059839

RESUMEN

H2O2 photosynthesis has attracted great interest in harvesting and converting solar energy to chemical energy. Nevertheless, the high-efficiency process of H2O2 photosynthesis is driven by the low H2O2 productivity due to the recombination of photogenerated electron-hole pairs, especially in the absence of a sacrificial agent. In this work, we demonstrate that ultrathin ZnIn2S4 nanosheets with S vacancies (Sv-ZIS) can serve as highly efficient catalysts for H2O2 photosynthesis via O2/H2O redox. Mechanism studies confirm that Sv in ZIS can extend the lifetimes of photogenerated carriers and suppress their recombination, which triggers the O2 reduction and H2O oxidation to H2O2 through radical initiation. Theoretical calculations suggest that the formation of Sv can strongly change the coordination structure of ZIS, modulating the adsorption abilities to intermediates and avoiding the overoxidation of H2O to O2 during O2/H2O redox, synergistically promoting 2e- O2 reduction and 2e- H2O oxidation for ultrahigh H2O2 productivity. The optimal catalyst displays a H2O2 productivity of 1706.4 µmol g-1 h-1 under visible-light irradiation without a sacrificial agent, which is ∼29 times higher than that of pristine ZIS (59.4 µmol g-1 h-1) and even much higher than those of reported photocatalysts. Impressively, the apparent quantum efficiency is up to 9.9% at 420 nm, and the solar-to-chemical conversion efficiency reaches ∼0.81%, significantly higher than the value for natural synthetic plants (∼0.10%). This work provides a facile strategy to separate the photogenerated electron-hole pairs of ZIS for H2O2 photosynthesis, which may promote fundamental research on solar energy harvest and conversion.

4.
J Am Chem Soc ; 145(51): 28010-28021, 2023 Dec 27.
Artículo en Inglés | MEDLINE | ID: mdl-38095915

RESUMEN

Phase regulation of noble metal-based nanomaterials provides a promising strategy for boosting the catalytic performance. However, realizing the continuous phase modulation in two-dimensional structures and unveiling the relevant structure-performance relationship remain significant challenges. In this work, we present the first example of continuous phase modulation in a library of Pd-Te hexagonal nanoplates (HNPs) from cubic-phase Pd4Te, rhombohedral-phase Pd20Te7, rhombohedral-phase Pd8Te3, and hexagonal-phase PdTe to hexagonal-phase PdTe2. Notably, the continuous phase regulation of the well-defined Pd-Te HNPs enables the successful modulation of the distance between adjacent Pd active sites, triggering an exciting way for tuning the relevant catalytic reactions intrinsically. The proof-of-concept oxygen reduction reaction (ORR) experiment shows a Pd-Pd distance-dependent ORR performance, where the hexagonal-phase PdTe HNPs present the best electrochemical performance in ORR (mass activity and specific activity of 1.02 A mg-1Pd and 1.83 mA cm-2Pd at 0.9 V vs RHE). Theoretical investigation reveals that the increased Pd-Pd distance relates to the weak *OH adsorption over Pd-Te HNPs, thus contributing to the remarkable ORR activity of PdTe HNPs. This work advances the phase-controlled synthesis of noble metal-based nanostructures, which gives huge impetus to the design of high-efficiency nanomaterials for diverse applications.

5.
Neurol Sci ; 44(5): 1703-1708, 2023 May.
Artículo en Inglés | MEDLINE | ID: mdl-36662315

RESUMEN

OBJECTIVES: Although lenticulostriate artery (LSA) territorial infarcts usually appear as single subcortical infarctions (SSIs) on imaging, they are caused by various etiological mechanisms. We aimed to investigate the correlation between LSA morphology and the location or size of infarcts. Besides, we explored whether the location or size of infarcts can predict the presence of middle cerebral artery (MCA) plaques and distinguish the different etiological mechanisms of SSI patients. METHODS: We prospectively included patients with acute SSI in the LSA territory. The MCA plaques, infarct features, including the number of infarct slices, lowest infarct layer index (LILI), volume, maximum area and diameter, and LSA morphological characteristics, including the number of stems and branches, length, distance, and tortuosity were evaluated. RESULTS: A total of 105 patients were enrolled. Both the average length and average distance of LSAs were negatively correlated with the maximum infarct area (P=0.048, P=0.028, respectively) and maximum infarct diameter (P=0.016, P=0.010, respectively) on axial examination and were positively correlated with LILI (P=0.020, P=0.003, respectively). The number of LSA branches was associated with the number of infarct slices (P=0.040) and LILI (P=0.043). Moreover, we found that when the LILI=1 or 2 and the number of infarct slices ≥3, the SSI patients were more likely to have MCA plaques (P=0.045). CONCLUSIONS: SSI patients with a LILI=1 or 2 and infarct slices of ≥3 were more likely to have MCA plaques. Our findings might provide a simple and feasible method to distinguish the different underlying mechanisms of SSIs for clinicians.


Asunto(s)
Infarto Cerebral , Angiografía por Resonancia Magnética , Humanos , Angiografía por Resonancia Magnética/métodos , Infarto Cerebral/diagnóstico por imagen , Infarto Cerebral/etiología , Arteria Cerebral Media/diagnóstico por imagen , Imagen de Difusión por Resonancia Magnética/métodos , Causalidad
6.
Angew Chem Int Ed Engl ; 62(3): e202213783, 2023 Jan 16.
Artículo en Inglés | MEDLINE | ID: mdl-36400747

RESUMEN

High-entropy alloys (HEAs) have been attracting extensive research interests in designing advanced nanomaterials, while their precise control is still in the infancy stage. Herein, we have reported a well-defined PtBiPbNiCo hexagonal nanoplates (HEA HPs) as high-performance electrocatalysts. Structure analysis decodes that the HEA HP is constructed with PtBiPb medium-entropy core and PtBiNiCo high-entropy shell. Significantly, the HEA HPs can reach the specific and mass activities of 27.2 mA cm-2 and 7.1 A mgPt -1 for formic acid oxidation reaction (FAOR), being the record catalyst ever achieved in Pt-based catalysts, and can realize the membrane electrode assembly (MEA) power density (321.2 mW cm-2 ) in fuel cell. Further experimental and theoretical analyses collectively evidence that the hexagonal intermetallic core/atomic layer shell structure and multi-element synergy greatly promote the direct dehydrogenation pathway of formic acid molecule and suppress the formation of CO*.

7.
Neurocrit Care ; 36(3): 822-830, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-34751418

RESUMEN

BACKGROUND: Postinterventional cerebral hyperdensities are common on non-contrast-enhanced computed tomography (CT) after endovascular thrombectomy in patients with acute ischemic stroke, which may reflect blood-brain barrier damage. The disruption of the blood-brain barrier may lead to malignant brain edema. The relationship between the extent of postinterventional cerebral hyperdensities and malignant brain edema is unclear. METHODS: Patients with middle cerebral artery territory infarction and successful recanalization were consecutively enrolled. Postinterventional non-contrast-enhanced CT was performed to evaluate postinterventional cerebral hyperdensities within 24 h after endovascular thrombectomy. On the basis of the areas of the Alberta Stroke Program Early CT Score, we devised the Hyperdensity on CT Score to evaluate the extent of postinterventional cerebral hyperdensities. The primary outcome was malignant brain edema, defined as the development of clinical signs of herniation (including a decrease in consciousness and/or anisocoria), accompanied by imaging evidence of brain swelling. The component of postinterventional cerebral hyperdensities was divided into contrast staining and hemorrhage on the basis of persistency. RESULTS: Three hundred sixty patients were included (50.6% male, mean age 67.9 years), of whom 247 (68.6%) developed postinterventional cerebral hyperdensities and 66 (18.3%) developed malignant brain edema. After adjustment for confounders, including the component of postinterventional cerebral hyperdensities, the extent of postinterventional cerebral hyperdensities assessed by the Hyperdensity on CT Score was significantly associated with malignant brain edema (odds ratio 1.46, 95% confidence interval 1.20-1.77, p < 0.001). A Hyperdensity on CT Score greater than 3 had a sensitivity of 0.73 and a specificity of 0.87 for predicting malignant brain edema. CONCLUSIONS: The extent of postinterventional cerebral hyperdensities on postinterventional non-contrast-enhanced CT was associated with malignant brain edema. The Hyperdensity on CT Score could be used to predict malignant brain edema regardless of the component of postinterventional cerebral hyperdensities.


Asunto(s)
Edema Encefálico , Isquemia Encefálica , Accidente Cerebrovascular Isquémico , Accidente Cerebrovascular , Anciano , Edema Encefálico/diagnóstico por imagen , Edema Encefálico/etiología , Isquemia Encefálica/diagnóstico por imagen , Isquemia Encefálica/terapia , Edema , Femenino , Humanos , Infarto de la Arteria Cerebral Media/diagnóstico por imagen , Infarto de la Arteria Cerebral Media/cirugía , Accidente Cerebrovascular Isquémico/diagnóstico por imagen , Accidente Cerebrovascular Isquémico/cirugía , Masculino , Estudios Retrospectivos , Accidente Cerebrovascular/diagnóstico por imagen , Accidente Cerebrovascular/cirugía , Trombectomía/métodos
8.
Stroke ; 51(9): 2801-2809, 2020 09.
Artículo en Inglés | MEDLINE | ID: mdl-32757756

RESUMEN

BACKGROUND AND PURPOSE: We aimed to use novel whole-brain vessel-wall magnetic resonance imaging (WB-VWI) to investigate the association between plaque distribution of middle cerebral artery (MCA) and morphological changes of the lenticulostriate arteries (LSAs) in single subcortical infarctions. METHODS: Forty single subcortical infarction patients with no relevant MCA disease on magnetic resonance angiography were prospectively enrolled. Plaque location in the MCA was dichotomized as proximal (located adjacent to the LSA origin) or distal (located distal to the LSA origin) on whole-brain vessel-wall magnetic resonance imaging. The MCAs with proximal plaques were divided into the symptomatic and asymptomatic side, and asymptomatic side MCAs without proximal plaques were the control group. The morphological characteristics of the LSAs and features of proximal plaques were analyzed. RESULTS: A total of 71 MCAs in 40 patients were analyzed (31 on the symptomatic side, 22 on the asymptomatic side, and 18 in the control group). Superior-wall plaques of MCAs were observed more frequently on the symptomatic side than the asymptomatic side (45.2% versus 9.1%, P=0.005). The wall area index, plaque burden, and remodeling index did not differ significantly between the symptomatic and asymptomatic side. The number of LSA branches was smaller (P=0.011) in the symptomatic side (5.48±1.88) compared with the control group (6.83±1.92). The symptomatic side exhibited shorter average length of the LSAs (23.23±3.44 versus 25.75±3.76 mm, P=0.025) and shorter average distance of the LSAs (16.47±3.11 versus 21.53±4.76 mm, P<0.001) compared with the asymptomatic side. CONCLUSIONS: Superiorly distributed MCA plaques at the LSA origin are closely associated with morphological changes of the LSA in symptomatic MCAs, suggesting that the distribution, rather than the inherent features of plaques, determines the occurrence of single subcortical infarctions. Our findings provide insight into the etiologic mechanism of branch atheromatous disease in single subcortical infarctions.


Asunto(s)
Arterias Cerebrales/diagnóstico por imagen , Infarto Cerebral/diagnóstico por imagen , Placa Aterosclerótica/diagnóstico por imagen , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Lateralidad Funcional , Humanos , Procesamiento de Imagen Asistido por Computador , Infarto de la Arteria Cerebral Media/diagnóstico por imagen , Arteriosclerosis Intracraneal/diagnóstico por imagen , Angiografía por Resonancia Magnética , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Adulto Joven
9.
Appl Nurs Res ; 54: 151281, 2020 08.
Artículo en Inglés | MEDLINE | ID: mdl-32650890

RESUMEN

Many professional athletes, after the end of their careers, cannot fully carry out daily social activities due to problems with health. The main problem is a significant rate of cardiovascular diseases. Therefore, the choice of rehabilitation techniques for former athletes is of primary importance. The aim of the paper is to create a model that increases the ability to predict both relapses and remissions during rehabilitation in cardiovascular diseases. The model takes into account the features of the cardiovascular function in athletes and their recovery. The article shows that the reliability of the implemented model can predict both necessary rehabilitation duration and time to complete recovery of an athlete's functional condition. The novelty of this study is that rehabilitation is based on the approximation of exercise load to the optimal levels during disease monitoring. The practical significance of the study is that during the rehabilitation of athletes, the obtained model to predict the course of the disease is aimed at the minimization of negative consequences for the athlete's cardiovascular system following professional activities. This model is recommended for use in medical prediction.


Asunto(s)
Atletas , Tolerancia al Ejercicio , Ejercicio Físico , Humanos , Reproducibilidad de los Resultados
10.
Zhongguo Zhong Yao Za Zhi ; 45(20): 4861-4866, 2020 Oct.
Artículo en Zh | MEDLINE | ID: mdl-33350257

RESUMEN

To explore the effects of early bolting on the quality of Peucedanum praeruptorum, the anatomical structures of P. praeruptorum root between bolting and no-bolting were investigated by paraffin section method, and contents of praeruptorin A, praeruptorin B, praeruptorin E, bergapten were determined by HPLC, then the differences and inter-relations were studied by comparative analysis method. The results showed that there existed great influences of early bolting on the root anatomical structures and coumarins content of P. praeruptorum.(1)The area of pericyclic parenchyma tissue and secondary phloem in P. praeruptorum without bolting are large, and have higher content of coumarins.(2) The areas of secondary phloem in bolting P. praeruptorum are large, and have lot of vessels and wood fiber, and the content of coumarins is low.(3)There are significant different of coumarins contents in P. praeruptorum with and without bolting, in their main root(MR),outside the vascular cambium(PP), inside the vascular cambium(PX), and the leaf(LF) parts, and the total content of coumarins was PP>MR>LF>PX. Accordingly, the root anatomical structure and active component of P. praeruptorum were changed after early bolting, which have an important influence on the quality of Peucedani Radix.


Asunto(s)
Apiaceae , Cromatografía Líquida de Alta Presión , Cumarinas/análisis
11.
Ecotoxicol Environ Saf ; 169: 161-168, 2019 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-30445247

RESUMEN

The characteristics of bioaerosol emissions from wastewater treatment plants (WWTPs) have attracted extensive attention. The anaerobic-anoxic-oxic (A2O) process, which uses the activated sludge approach to wastewater treatment, is the most widely used process in WWTPs. Concentration, size distribution, population, and exposure risk from bacteria and fungi in bioaerosols of WWTPs using the A2O process were studied in this work. The results showed that the maximum concentration of airborne bacteria (1.00 × 104 Colony Forming Units per cubic meter (CFU m-3)) and fungi (1.44 ×104 CFU m-3) occurred from the facility's aerobic tank, in summer. As one of the main factors affecting bioaerosol exposure risk, particle size distribution was related to season. The study found that particles larger than 3.3 µm in diameter were detected mainly in spring and summer, while particles less than 3.3 µm were detected mainly in autumn and winter, whether bacterial aerosol or fungal aerosol. In addition, pathogenic bacteria were observed in bioaerosols from WWTPs, with 18 of the 65 species of bacteria detected found to be potentially or opportunistically pathogenic, such as Chryseobacterium, Stenotrophomonas, Alcaligenes, Micrococcus, Pantoea, Enterobacter and Escherichia-Shigella. The presence of these pathogens further increased the exposure risk from bioaerosols. The results of an inhalation risk assessment for airborne bacteria and fungi indicated that potential adverse health risks for adults mainly occurred in spring, summer, and autumn. On this basis, it was concluded that WWTP operators should set up effective bioaerosol controls as soon as possible to protect the health of workers, and of residents near the plant.


Asunto(s)
Microbiología del Aire/normas , Contaminantes Ocupacionales del Aire/análisis , Monitoreo del Ambiente/métodos , Exposición Profesional/análisis , Aguas Residuales/microbiología , Purificación del Agua/métodos , Aerosoles , China , Recuento de Colonia Microbiana , Humanos , Medición de Riesgo , Estaciones del Año
12.
Ecotoxicol Environ Saf ; 183: 109543, 2019 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-31400722

RESUMEN

Aerosols from wastewater treatment plants (WWTPs) are considered to be potentially hazardous to on-site employees and surrounding residents. However, their harmful components and their effects remain poorly understood. In this study, the characteristics, responsible factors, sources and exposure risks of potential pathogens and toxic metal(loid)s in aerosols from four WWTPs were investigated. There were 21 potential pathogens and 15 toxic metal(loid)s detected in the aerosols. Arcobacter and Fe were the dominant taxa responsible for the dissimilarity of the potential pathogen population and toxic metal(loid) composition between the aerosols and the wastewater/sludge, respectively. Both meteorological factors and sources affected pathogen and toxic metal(loid) composition. The potential pathogens and toxic metal(loid)s in indoor aerosols mainly originated from wastewater/sludge, while those in outdoor aerosols originated from wastewater/sludge and ambient air. The highest respirable fraction (<3.30 µm) concentrations and proportions were detected at the aeration units. Non-carcinogenic and carcinogenic risks of toxic metal(loid)s for both adults and children were found within and/or around WWTPs, and non-carcinogenic risks of bacteria for children were found at downwind, suggesting the need for active safeguard procedures, such as that employees wear masks and work clothes, covering the main emission sites, and collecting and destroying of aerosols.


Asunto(s)
Microbiología del Aire/normas , Contaminantes Atmosféricos/análisis , Contaminación del Aire Interior/análisis , Metaloides/análisis , Metales Pesados/análisis , Aguas Residuales , Adulto , Aerosoles , Arcobacter/aislamiento & purificación , Arcobacter/patogenicidad , Niño , Humanos , Aguas del Alcantarillado/microbiología , Aguas Residuales/química , Aguas Residuales/microbiología , Purificación del Agua/métodos
13.
J Environ Sci (China) ; 80: 128-136, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-30952330

RESUMEN

The changes of protein secondary structures in the extracellular polymeric substances (EPS) extracted from activated sludge by four different methods were studied by analyzing the amide I region (1700-1600 cm-1) of the Fourier transform infrared spectra and model protein test. The results showed the molecular weight distribution of organic matter extracted by centrifugation, heating and cation exchange resin (CER) was similar, while the EPS extracted by centrifugation (Control) and CER had similar fluorescent organic matter. The protein secondary structures of extracted EPS by the four methods were different. The similarities of protein secondary structures between the EPS extracted by CER with the Control were the highest among the four extracted EPS. Although the EPS yield extracted by formaldehyde + NaOH method were the highest, its protein secondary structures had the lowest similarity with those extracted by the Control. Additionally, the effects of centrifugation and CER extraction on the secondary structures of bovine serum albumin were also lower than that of other extraction processes. CER enables the second maximum extraction of EPS and maximum retention of the original secondary structure of proteins.


Asunto(s)
Proteínas Bacterianas/análisis , Matriz Extracelular de Sustancias Poliméricas , Resinas de Intercambio de Catión , Fraccionamiento Químico , Polímeros
14.
J Org Chem ; 82(4): 1961-1968, 2017 02 17.
Artículo en Inglés | MEDLINE | ID: mdl-28177250

RESUMEN

A concise route for the synthesis of indenoisoquinoline derivatives from 2-iodobenzamide and 1,3-indanedione derivatives in the presence of copper(II) chloride and cesium carbonate in acetonitrile solvent is reported. A wide variety of 2-iodobenzamide derivatives and indandiones could be used to synthesize indenoisoquinoline derivatives and other fused indenoisoquinoline in moderate to good yields. This methodology was adapted for the one-step synthesis of a series of clinically active topoisomerase I inhibitors such as NSC 314622, LMP-400, LMP-776.


Asunto(s)
Cobre/química , Indenos/síntesis química , Isoquinolinas/síntesis química , Catálisis , Cristalografía por Rayos X , Indenos/química , Isoquinolinas/química , Modelos Moleculares , Estructura Molecular
16.
Neurochem Res ; 41(4): 933-42, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26700432

RESUMEN

Accumulating data suggest that sodium-hydrogen exchangers (NHEs) play a key role in modulating seizure activity by regulating neuronal pH in the brain. Amiloride, an inhibitor of NHEs, has been demonstrated to be effective in many seizure models, although its efficacy for prolonged febrile seizures (FS) remains unclear. In this study, we investigated whether amiloride could produce neuroprotective effects in a prolonged FS model in which FS were induced in rat pups at postnatal day 10 using a heated air approach. Amiloride was administered by intraperitoneal injection at three different doses (0.65, 1.3 and 2.6 mg/kg). Pretreatment with amiloride significantly delayed the onset of the first episode of limbic seizures, whereas posttreatment with amiloride decreased escape latency in the Morris water maze test compared to post-FS treatment with saline. Amiloride also inhibited seizure-induced aberrant neurogenesis. In conclusion, this study demonstrated the antiseizure activity of amiloride. In particular, posttreatment with amiloride resulted in cognitive improvement; this finding provides crucial evidence of the neuroprotective function of amiloride and of the therapeutic potential of amiloride in FS.


Asunto(s)
Amilorida/uso terapéutico , Proteínas de Transporte de Catión/antagonistas & inhibidores , Trastornos del Conocimiento/tratamiento farmacológico , Convulsiones Febriles/tratamiento farmacológico , Intercambiadores de Sodio-Hidrógeno/antagonistas & inhibidores , Animales , Presión Sanguínea/efectos de los fármacos , Proteínas de Transporte de Catión/metabolismo , Trastornos del Conocimiento/psicología , Hipocampo/efectos de los fármacos , Hipocampo/metabolismo , Hipocampo/patología , Aprendizaje por Laberinto/efectos de los fármacos , Neurogénesis , Neuronas/patología , Ratas Sprague-Dawley , Convulsiones Febriles/patología , Convulsiones Febriles/fisiopatología , Convulsiones Febriles/psicología , Intercambiador 1 de Sodio-Hidrógeno , Intercambiadores de Sodio-Hidrógeno/metabolismo , Factores de Tiempo
17.
Crit Care ; 20: 46, 2016 Feb 25.
Artículo en Inglés | MEDLINE | ID: mdl-26916702

RESUMEN

BACKGROUND: Prediction of the functional outcome for patients with convulsive status epilepticus (CSE) has been a challenge. The aim of this study was to characterize the prognostic factors and functional outcomes of patients after CSE in order to develop a practicable scoring system for outcome prediction. METHODS: We performed a retrospective explorative analysis on consecutive patients diagnosed with CSE between March, 2008 and November, 2014 in a tertiary academic medical center in northwest China. The modified Rankin Scale (mRS) was used to measure the functional outcome at three months post discharge. RESULTS: A total of 132 CSE patients was included, with a median age of 25.5 years and 60.6% were male. Three months post discharge, an unfavorable outcome with mRS of 3-6 was seen in 62 (47.0%) patients, 25 (18.9%) of whom died. Logistic regression analysis revealed that encephalitis (p = 0.029), nonconvulsive SE (p = 0.018), diazepam resistance (p = 0.005), image abnormalities (unilateral lesions, p = 0.027; bilateral lesions or diffuse cerebral edema, p < 0.001) and tracheal intubation (p = 0.032) were significant independent predictors for unfavorable outcomes. Based on the coefficients in the model, these predictors were assigned a value of 1 point each, with the exception of the image, creating a 6-point scoring system, which we refer to as END-IT, for the outcome prediction of CSE. The area under the receiver operating characteristic curve for the END-IT score was 0.833 and using a cut-off point of 3 produced the highest sum sensitivity (83.9%) and specificity (68.6%). Compared with status epilepticus severity score (STESS) and Epidemiology-based Mortality score in SE (EMSE), END-IT score showed better discriminative power and predictive accuracy for the outcome prediction. CONCLUSIONS: We developed an END-IT score with a strong discriminative power for predicting the functional outcome of CSE patients. External prospective validation in different cohorts is needed for END-IT score.


Asunto(s)
Evaluación del Resultado de la Atención al Paciente , Estado Epiléptico/mortalidad , Adolescente , Adulto , China , Femenino , Predicción/métodos , Humanos , Masculino , Persona de Mediana Edad , Pronóstico , Estudios Prospectivos , Estudios Retrospectivos , Índice de Severidad de la Enfermedad , Análisis de Supervivencia , Resultado del Tratamiento
18.
Molecules ; 20(6): 10910-27, 2015 Jun 12.
Artículo en Inglés | MEDLINE | ID: mdl-26076111

RESUMEN

An efficient and straight forward procedure for the syntheses of bicyclic isoxazole/isoxazoline derivatives from the corresponding dimethyl-2-(2-nitro-1-aryl/alkyl)-2-(prop-2-yn-1yl)malonates or dimethyl 2-allyl-2-(2-nitro-1-aryl/alkyl ethyl)malonate is described. High yields and simple operations are important features of this methodology.


Asunto(s)
Reacción de Cicloadición , Isoxazoles/síntesis química , Óxido Nítrico/química
19.
Orthop Surg ; 16(3): 568-576, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38233358

RESUMEN

OBJECTIVE: Endobutton technique could provide flexible coracoclavicular (CC) stabilization for acromioclavicular joint (ACJ) dislocation and achieved good clinical outcomes. However, the difficult part of this technique was placement of the Endobutton to the coracoid base. In this study, we designed an Endobutton installation device to place the Endobutton at the coracoid base. And we examined the clinical and radiographic outcomes of patients with acute Rockwood type III ACJ dislocation repaired with Endobutton using this device. METHODS: We designed an Endobutton installation device to place the Endobutton at the coracoid base to achieve CC stabilization. We retrospectively reviewed 42 patients with acute Rockwood type III ACJ dislocation who underwent CC stabilization with Endobuttons placed either using this novel device (group I, n = 19) or the traditional technique (CC stabilization without using special device, group II, n = 23) from January 2015 to April 2020. The two groups were compared regarding the operative time, intraoperative blood loss, and clinical and radiologic outcomes at final follow-up. The operation-related complications were also evaluated. The Student's t test and the Mann-Whitney U-test were used to compare differences in continuous variables. Differences in categorical variables were assessed with either the Pearson's chi-squared test or Fisher's exact test. RESULTS: Forty-two patients were clinically followed up for a minimum of 12 months. Compared with group II, group I had a significantly shorter mean operative time (56.05 ± 7.82 min vs. 65.87 ± 7.43 min, p < 0.01) and significantly lesser mean intraoperative blood loss (67.89 ± 14.75 mL vs. 94.78 ± 25.01 mL, p < 0.01). At final follow-up, there were no significant differences between the two groups in the visual analog scale score for pain, Oxford Shoulder Score, Disabilities of the Arm, Shoulder, and Hand score, and postoperative CC distance of the affected side. Loss of reduction occurred in four patients in group I and three patients in group II (p = 0.68); there were no other operation-related complications in either group. CONCLUSIONS: The Endobutton installation device makes placement of the Endobutton at the coracoid base easier and achieves satisfactory clinical and radiologic outcomes without additional complications in acute Rockwood type III ACJ dislocation.


Asunto(s)
Articulación Acromioclavicular , Luxaciones Articulares , Luxación del Hombro , Humanos , Luxaciones Articulares/cirugía , Estudios Retrospectivos , Articulación Acromioclavicular/cirugía , Pérdida de Sangre Quirúrgica , Resultado del Tratamiento , Luxación del Hombro/cirugía
20.
Environ Pollut ; 343: 123169, 2024 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-38128715

RESUMEN

The antibiotic-resistant pollution in size-segregated bioaerosols from wastewater treatment plants (WWTPs) is of increasing concern due to its public health risks, but an elaborate review is still lacking. This work overviewed the profile, mobility, pathogenic hosts, source, and risks of antibiotic resistance genes (ARGs) in size-segregated bioaerosols from WWTPs. The dominant ARG type in size-segregated bioaerosols from WWTPs was multidrug resistance genes. Treatment units that equipped with mechanical facilities and aeration devices, such as grilles, grit chambers, biochemical reaction tanks, and sludge treatment units, were the primary sources of bioaerosol antibiotic resistome in WWTPs. Higher enrichment of antibiotic resistome in particulate matter with an aerodynamic diameter of <2.5 µm, was found along the upwind-downwind-WWTPs gradient. Only a small portion of ARGs in inhalable bioaerosols from WWTPs were flanked by mobile genetic elements. The pathogens with multiple drug resistance had been found in size-segregated bioaerosols from WWTPs. Different ARGs or antibiotic resistant bacteria have different aerosolization potential associated with bioaerosols from various treatment processes. The validation of pathogenic antibiotic resistance bacteria, deeper investigation of ARG mobility, emission mechanism of antibiotic resistome, and development of treatment technologies, should be systematically considered in future.


Asunto(s)
Antibacterianos , Purificación del Agua , Antibacterianos/farmacología , Aguas Residuales , Farmacorresistencia Microbiana/genética , Aguas del Alcantarillado/microbiología , Bacterias , Genes Bacterianos
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