Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 30
Filtrar
1.
Opt Lett ; 49(11): 2910-2913, 2024 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-38824290

RESUMEN

In this work, we propose and demonstrate experimentally a compact technique for generating cylindrical vector beams based on a Michelson interferometer and a π-astigmatic mode converter. The latter is required to invert the topological charge of higher-order Laguerre-Gauss (LG) beams. Our proposed technique generalizes the use of astigmatic mode conversion, commonly associated only with scalar beams, to vector beams with a non-homogeneous polarization distribution. We anticipate that many applications based on Michelson interferometers will benefit from the unique properties of vector beams.

2.
Lancet Diabetes Endocrinol ; 12(5): 330-338, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38588684

RESUMEN

BACKGROUND: The association between the glycaemic index and the glycaemic load with type 2 diabetes incidence is controversial. We aimed to evaluate this association in an international cohort with diverse glycaemic index and glycaemic load diets. METHODS: The PURE study is a prospective cohort study of 127 594 adults aged 35-70 years from 20 high-income, middle-income, and low-income countries. Diet was assessed at baseline using country-specific validated food frequency questionnaires. The glycaemic index and the glycaemic load were estimated on the basis of the intake of seven categories of carbohydrate-containing foods. Participants were categorised into quintiles of glycaemic index and glycaemic load. The primary outcome was incident type 2 diabetes. Multivariable Cox Frailty models with random intercepts for study centre were used to calculate hazard ratios (HRs). FINDINGS: During a median follow-up of 11·8 years (IQR 9·0-13·0), 7326 (5·7%) incident cases of type 2 diabetes occurred. In multivariable adjusted analyses, a diet with a higher glycaemic index was significantly associated with a higher risk of diabetes (quintile 5 vs quintile 1; HR 1·15 [95% CI 1·03-1·29]). Participants in the highest quintile of the glycaemic load had a higher risk of incident type 2 diabetes compared with those in the lowest quintile (HR 1·21, 95% CI 1·06-1·37). The glycaemic index was more strongly associated with diabetes among individuals with a higher BMI (quintile 5 vs quintile 1; HR 1·23 [95% CI 1·08-1·41]) than those with a lower BMI (quintile 5 vs quintile 1; 1·10 [0·87-1·39]; p interaction=0·030). INTERPRETATION: Diets with a high glycaemic index and a high glycaemic load were associated with a higher risk of incident type 2 diabetes in a multinational cohort spanning five continents. Our findings suggest that consuming low glycaemic index and low glycaemic load diets might prevent the development of type 2 diabetes. FUNDING: Full funding sources are listed at the end of the Article.


Asunto(s)
Diabetes Mellitus Tipo 2 , Índice Glucémico , Carga Glucémica , Humanos , Diabetes Mellitus Tipo 2/epidemiología , Diabetes Mellitus Tipo 2/sangre , Persona de Mediana Edad , Femenino , Masculino , Índice Glucémico/fisiología , Estudios Prospectivos , Adulto , Anciano , Factores de Riesgo , Incidencia , Glucemia/análisis , Dieta , Estudios de Cohortes
3.
IEEE Trans Cybern ; 54(5): 2683-2695, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38512748

RESUMEN

Smart manufacturing has been transforming toward industrial digitalization integrated with various advanced technologies. Metaverse has been evolving as a next-generation paradigm of a digital space extended and augmented by reality. In the metaverse, users are interconnected for various virtual activities. In consideration of advanced possibilities that may be brought by the metaverse, it is envisioned that industrial metaverse should be integrated into smart manufacturing to upgrade industry for more visible, intelligent and efficient production in the future. Therefore, a conceptual model, named IMverse Model, and novel characteristics of the industrial metaverse for smart manufacturing are proposed in this article. Besides, an industrial metaverse architecture, named IMverse Architecture, is proposed involving several key enabling technologies. Typical innovative applications of the industrial metaverse throughout the whole product life cycle for smart manufacturing are presented with insights. Nonetheless, in prospect of future, the industrial metaverse still faces limitations and is far from implementation. Thus, challenges and open issues of the industrial metaverse for smart manufacturing are discussed, then outlook is provided for further research and application.

5.
Sci Total Environ ; 853: 158597, 2022 Dec 20.
Artículo en Inglés | MEDLINE | ID: mdl-36089039

RESUMEN

Atmospheric humidity has been shown to promote haze formation, but it remains unclear why the air is humid during heavy haze days in winter. Here we combine water vapor isotope measurements with WRF-Chem simulations to elucidate increasing humidity with aggravation of haze during wintertime in urban Beijing. The vapor isotopic analysis in Beijing shows that the combustion-derived water (CDW) constitutes 11.0± 6.2 % of the atmospheric moisture and its fraction in total moisture increases with aggravation of haze. Modeling results reveal that, in addition to the water vapor transported from south or east to Beijing with occurrence of haze, CDW has a considerable impact on the increasing humidity when haze becomes heavy or severe. Aerosol-radiation interactions generally decrease the water vapor content and only increase humidity with occurrence of severe haze with hourly PM2.5 concentrations exceeding 250µg m-3. Although CDW is insignificant in the global atmospheric vapor budget, it could play an important role in modifying the local weather during haze days.


Asunto(s)
Contaminantes Atmosféricos , Contaminación del Aire , Material Particulado/análisis , Contaminantes Atmosféricos/análisis , Beijing , Monitoreo del Ambiente , Vapor/análisis , Aerosoles/análisis , Estaciones del Año , Contaminación del Aire/análisis , China
6.
Sci Rep ; 12(1): 14470, 2022 08 25.
Artículo en Inglés | MEDLINE | ID: mdl-36008544

RESUMEN

During an ischemic stroke, the brain releases various factors, including glutamate and γ-aminobutyric acid. Glutamate can cause neurotoxic effects through certain receptors and exacerbate neurological damage, while γ-aminobutyric acid as an inhibitory neurotransmitter can antagonize the excitotoxic effects of glutamate and enhance the tolerance of neurons to ischemia. Therefore, in this study, the content of amino acid neurotransmitters in brain tissue before ischemia, after 10 min of ischemia, hypothermic perfusion, and rewarming were analyzed by high-performance liquid chromatography-UV in an animal model of ischemic stroke generated by blocking the bilateral common carotid arteries of rhesus monkeys. The changes in amino acid neurotransmitters in the rhesus monkey brain during post-ischemia hypothermic perfusion and rewarming were investigated by statistical methods of repeated measures ANOVA, showing that the concentration change of glutamate had not only a temporal factor but also was influenced by temperature, and there was an interaction effect between the two. Time but not temperature affected the change in γ-aminobutyric acid concentration, and there was an interaction effect between the two. Accordingly, hypoperfusion exerts a protective effect during ischemia by inhibiting the release of excitatory amino acid neurotransmitters, while the antagonistic effect of GABA on Glu is not significant.


Asunto(s)
Isquemia Encefálica , Hipotermia , Accidente Cerebrovascular Isquémico , Aminoácidos/metabolismo , Análisis de Varianza , Animales , Isquemia Encefálica/metabolismo , Ácido Glutámico/metabolismo , Isquemia/metabolismo , Neurotransmisores/metabolismo , Ácido gamma-Aminobutírico/metabolismo
7.
Eur J Prev Cardiol ; 29(14): 1817-1826, 2022 10 20.
Artículo en Inglés | MEDLINE | ID: mdl-35512128

RESUMEN

AIMS: Elevated body mass index (BMI) is an important cause of cardiovascular disease (CVD). The population-level impact of pharmacologic strategies to mitigate the risk of CVD conferred by the metabolic consequences of an elevated BMI is not well described. METHODS AND RESULTS: We conducted an analysis of 145 986 participants (mean age 50 years, 58% women) from 21 high-, middle-, and low-income countries in the Prospective Urban and Rural Epidemiology study who had no history of cancer, ischaemic heart disease, heart failure, or stroke. We evaluated whether the hazards of CVD (myocardial infarction, stroke, heart failure, or cardiovascular death) differed among those taking a cardiovascular medication (n = 29 174; including blood pressure-lowering, blood glucose-lowering, cholesterol-lowering, or anti-thrombotic medications) vs. those not taking a cardiovascular medication (n = 116 812) during 10.2 years of follow-up. Cox proportional hazard models with the community as a shared frailty were constructed by adjusting age, sex, education, geographic region, physical activity, tobacco, and alcohol use. We observed 7928 (5.4%) CVD events and 9863 (6.8%) deaths. Cardiovascular medication use was associated with different hazards of CVD (interaction P < 0.0001) and death (interaction P = 0.0020) as compared with no cardiovascular medication use. Among those not taking a cardiovascular medication, as compared with those with BMI 20 to <25 kg/m2, the hazard ratio (HR) [95% confidence interval (95% CI)] for CVD were, respectively, 1.14 (1.06-1.23); 1.45 (1.30-1.61); and 1.53 (1.28-1.82) among those with BMI 25 to <30 kg/m2; 30 to <35 kg/m2; and ≥35 kg/m2. However, among those taking a cardiovascular medication, the HR (95% CI) for CVD were, respectively, 0.79 (0.72-0.87); 0.90 (0.79-1.01); and 1.14 (0.98-1.33). Among those not taking a cardiovascular medication, the respective HR (95% CI) for death were 0.93 (0.87-1.00); 1.03 (0.93-1.15); and 1.44 (1.24-1.67) among those with BMI 25 to <30 kg/m2; 30 to <35 kg/m2; and ≥35 kg/m2. However, among those taking a cardiovascular medication, the respective HR (95% CI) for death were 0.77 (0.69-0.84); 0.88 (0.78-0.99); and 1.12 (0.96-1.30). Blood pressure-lowering medications accounted for the largest population attributable benefit of cardiovascular medications. CONCLUSION: To the extent that CVD risk among those with an elevated BMI is related to hypertension, diabetes, and an elevated thrombotic milieu, targeting these pathways pharmacologically may represent an important complementary means of reducing the CVD burden caused by an elevated BMI.


Asunto(s)
Enfermedades Cardiovasculares , Insuficiencia Cardíaca , Accidente Cerebrovascular , Adulto , Femenino , Humanos , Persona de Mediana Edad , Masculino , Presión Sanguínea/fisiología , Enfermedades Cardiovasculares/diagnóstico , Enfermedades Cardiovasculares/tratamiento farmacológico , Enfermedades Cardiovasculares/epidemiología , Glucemia , Índice de Masa Corporal , Estudios Prospectivos , Factores de Riesgo , Modelos de Riesgos Proporcionales , Colesterol , Insuficiencia Cardíaca/complicaciones
8.
Sci Total Environ ; 818: 151849, 2022 Apr 20.
Artículo en Inglés | MEDLINE | ID: mdl-34822894

RESUMEN

Black Carbon (BC) is an important component of household air pollution (HAP) in low- and middle- income countries (LMICs), but levels and drivers of exposure are poorly understood. As part of the Prospective Urban and Rural Epidemiological (PURE) study, we analyzed 48-hour BC measurements for 1187 individual and 2242 household samples from 88 communities in 8 LMICs (Bangladesh, Chile, China, Colombia, India, Pakistan, Tanzania, and Zimbabwe). Light absorbance (10-5 m-1) of collected PM2.5 filters, a proxy for BC concentrations, was calculated via an image-based reflectance method. Surveys of household/personal characteristics and behaviors were collected after monitoring. The geometric mean (GM) of personal and household BC measures was 2.4 (3.3) and 3.5 (3.9)·10-5 m-1, respectively. The correlation between BC and PM2.5 was r = 0.76 for personal and r = 0.82 for household measures. A gradient of increasing BC concentrations was observed for cooking fuels: BC increased 53% (95%CI: 30, 79) for coal, 142% (95%CI: 117, 169) for wood, and 190% (95%CI: 149, 238) for other biomass, compared to gas. Each hour of cooking was associated with an increase in household (5%, 95%CI: 3, 7) and personal (5%, 95%CI: 2, 8) BC; having a window in the kitchen was associated with a decrease in household (-38%, 95%CI: -45, -30) and personal (-31%, 95%CI: -44, -15) BC; and cooking on a mud stove, compared to a clean stove, was associated with an increase in household (125%, 95%CI: 96, 160) and personal (117%, 95%CI: 71, 117) BC. Male participants only had slightly lower personal BC (-0.6%, 95%CI: -1, 0.0) compared to females. In multivariate models, we were able to explain 46-60% of household BC variation and 33-54% of personal BC variation. These data and models provide new information on exposure to BC in LMICs, which can be incorporated into future exposure assessments, health research, and policy surrounding HAP and BC.


Asunto(s)
Contaminantes Atmosféricos , Contaminación del Aire Interior , Contaminantes Atmosféricos/análisis , Contaminación del Aire Interior/análisis , Carbono , Culinaria , Exposición a Riesgos Ambientales , Monitoreo del Ambiente , Femenino , Humanos , Masculino , Material Particulado/análisis , Estudios Prospectivos , Población Rural
9.
Am J Clin Nutr ; 114(3): 1049-1058, 2021 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-33787869

RESUMEN

BACKGROUND: Dietary guidelines recommend limiting red meat intake because it is a major source of medium- and long-chain SFAs and is presumed to increase the risk of cardiovascular disease (CVD). Evidence of an association between unprocessed red meat intake and CVD is inconsistent. OBJECTIVE: The study aimed to assess the association of unprocessed red meat, poultry, and processed meat intake with mortality and major CVD. METHODS: The Prospective Urban Rural Epidemiology (PURE) Study is a cohort of 134,297 individuals enrolled from 21 low-, middle-, and high-income countries. Food intake was recorded using country-specific validated FFQs. The primary outcomes were total mortality and major CVD. HRs were estimated using multivariable Cox frailty models with random intercepts. RESULTS: In the PURE study, during 9.5 y of follow-up, we recorded 7789 deaths and 6976 CVD events. Higher unprocessed red meat intake (≥250 g/wk vs. <50 g/wk) was not significantly associated with total mortality (HR: 0.93; 95% CI: 0.85, 1.02; P-trend = 0.14) or major CVD (HR: 1.01; 95% CI: 0.92, 1.11; P-trend = 0.72). Similarly, no association was observed between poultry intake and health outcomes. Higher intake of processed meat (≥150 g/wk vs. 0 g/wk) was associated with higher risk of total mortality (HR: 1.51; 95% CI: 1.08, 2.10; P-trend = 0.009) and major CVD (HR: 1.46; 95% CI: 1.08, 1.98; P-trend = 0.004). CONCLUSIONS: In a large multinational prospective study, we did not find significant associations between unprocessed red meat and poultry intake and mortality or major CVD. Conversely, a higher intake of processed meat was associated with a higher risk of mortality and major CVD.


Asunto(s)
Enfermedades Cardiovasculares/etiología , Dieta , Conducta Alimentaria , Manipulación de Alimentos , Carne , Adulto , Estudios de Cohortes , Femenino , Salud Global , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Factores de Riesgo , Población Rural
10.
BMJ ; 372: m4948, 2021 02 03.
Artículo en Inglés | MEDLINE | ID: mdl-33536317

RESUMEN

OBJECTIVE: To evaluate the association between intakes of refined grains, whole grains, and white rice with cardiovascular disease, total mortality, blood lipids, and blood pressure in the Prospective Urban and Rural Epidemiology (PURE) study. DESIGN: Prospective cohort study. SETTING: PURE study in 21 countries. PARTICIPANTS: 148 858 participants with median follow-up of 9.5 years. EXPOSURES: Country specific validated food frequency questionnaires were used to assess intakes of refined grains, whole grains, and white rice. MAIN OUTCOME MEASURE: Composite of mortality or major cardiovascular events (defined as death from cardiovascular causes, non-fatal myocardial infarction, stroke, or heart failure). Hazard ratios were estimated for associations of grain intakes with mortality, major cardiovascular events, and their composite by using multivariable Cox frailty models with random intercepts to account for clustering by centre. RESULTS: Analyses were based on 137 130 participants after exclusion of those with baseline cardiovascular disease. During follow-up, 9.2% (n=12 668) of these participants had a composite outcome event. The highest category of intake of refined grains (≥350 g/day or about 7 servings/day) was associated with higher risk of total mortality (hazard ratio 1.27, 95% confidence interval 1.11 to 1.46; P for trend=0.004), major cardiovascular disease events (1.33, 1.16 to 1.52; P for trend<0.001), and their composite (1.28, 1.15 to 1.42; P for trend<0.001) compared with the lowest category of intake (<50 g/day). Higher intakes of refined grains were associated with higher systolic blood pressure. No significant associations were found between intakes of whole grains or white rice and health outcomes. CONCLUSION: High intake of refined grains was associated with higher risk of mortality and major cardiovascular disease events. Globally, lower consumption of refined grains should be considered.


Asunto(s)
Enfermedades Cardiovasculares/mortalidad , Carbohidratos de la Dieta/efectos adversos , Conducta Alimentaria , Granos Enteros , Adulto , Anciano , Encuestas sobre Dietas , Ingestión de Energía , Femenino , Salud Global , Humanos , Estudios Longitudinales , Masculino , Persona de Mediana Edad , Oryza/efectos adversos , Modelos de Riesgos Proporcionales , Estudios Prospectivos , Factores de Riesgo
11.
J Hazard Mater ; 398: 122971, 2020 11 05.
Artículo en Inglés | MEDLINE | ID: mdl-32512455

RESUMEN

Insect cytochrome P450 s (P450 s) are associated with the metabolic detoxification of toxic xenobiotics and their constitutive upregulation is often associated with resistance to natural and synthetic toxicants. The P450 s CYP321A16 and CYP332A1 are constitutively overexpressed in an insecticide-resistant strain of beet armyworm, Spodoptera exigua. However, the function and upstream regulation of these two P450 s remain unknown. Here, we investigated the function of CYP321A16 and CYP332A1 in resistance to the organophosphate insecticide, chlorpyrifos and their regulation by the transcription factors CncC and Maf. Transgenic strains of Drosophila melanogaster expressing CYP321A16 or CYP332A1 showed higher levels of tolerance to chlorpyrifos than the control flies with the same genetic background. Furthermore, recombinant CYP321A16 and CYP332A1 proteins metabolized chlorpyrifos. Analysis of the putative promoter sequences of the genes coding for CYP321A16 and CYP332A1 revealed conserved CncC/Maf binding sites. Transfection of luciferase reporter plasmids containing the promoter of CYP450 gene together with CncC and Maf expression plasmids significantly enhanced the activity of the reporter. Promoter truncation identified a site in the promoter of CYP321A16 that is critical for the CncC/Maf binding. These data demonstrate that resistance to chlorpyrifos in S. exigua is conferred by the combined action of CYP321A16 and CYP332A1 and uncovered their regulation by the transcription factors CncC and Maf.


Asunto(s)
Cloropirifos , Insecticidas , Factores de Transcripción , Animales , Cloropirifos/toxicidad , Drosophila melanogaster/efectos de los fármacos , Drosophila melanogaster/genética , Resistencia a los Insecticidas/efectos de los fármacos , Resistencia a los Insecticidas/genética , Insecticidas/toxicidad , Spodoptera/efectos de los fármacos , Spodoptera/genética , Xenobióticos
12.
JAMA Psychiatry ; 77(10): 1052-1063, 2020 10 01.
Artículo en Inglés | MEDLINE | ID: mdl-32520341

RESUMEN

Importance: Depression is associated with incidence of and premature death from cardiovascular disease (CVD) and cancer in high-income countries, but it is not known whether this is true in low- and middle-income countries and in urban areas, where most people with depression now live. Objective: To identify any associations between depressive symptoms and incident CVD and all-cause mortality in countries at different levels of economic development and in urban and rural areas. Design, Setting, and Participants: This multicenter, population-based cohort study was conducted between January 2005 and June 2019 (median follow-up, 9.3 years) and included 370 urban and 314 rural communities from 21 economically diverse countries on 5 continents. Eligible participants aged 35 to 70 years were enrolled. Analysis began February 2018 and ended September 2019. Exposures: Four or more self-reported depressive symptoms from the Short-Form Composite International Diagnostic Interview. Main Outcomes and Measures: Incident CVD, all-cause mortality, and a combined measure of either incident CVD or all-cause mortality. Results: Of 145 862 participants, 61 235 (58%) were male and the mean (SD) age was 50.05 (9.7) years. Of those, 15 983 (11%) reported 4 or more depressive symptoms at baseline. Depression was associated with incident CVD (hazard ratio [HR], 1.14; 95% CI, 1.05-1.24), all-cause mortality (HR, 1.17; 95% CI, 1.11-1.25), the combined CVD/mortality outcome (HR, 1.18; 95% CI, 1.11-1.24), myocardial infarction (HR, 1.23; 95% CI, 1.10-1.37), and noncardiovascular death (HR, 1.21; 95% CI, 1.13-1.31) in multivariable models. The risk of the combined outcome increased progressively with number of symptoms, being highest in those with 7 symptoms (HR, 1.24; 95% CI, 1.12-1.37) and lowest with 1 symptom (HR, 1.05; 95% CI, 0.92 -1.19; P for trend < .001). The associations between having 4 or more depressive symptoms and the combined outcome were similar in 7 different geographical regions and in countries at all economic levels but were stronger in urban (HR, 1.23; 95% CI, 1.13-1.34) compared with rural (HR, 1.10; 95% CI, 1.02-1.19) communities (P for interaction = .001) and in men (HR, 1.27; 95% CI, 1.13-1.38) compared with women (HR, 1.14; 95% CI, 1.06-1.23; P for interaction < .001). Conclusions and Relevance: In this large, population-based cohort study, adults with depressive symptoms were associated with having increased risk of incident CVD and mortality in economically diverse settings, especially in urban areas. Improving understanding and awareness of these physical health risks should be prioritized as part of a comprehensive strategy to reduce the burden of noncommunicable diseases worldwide.


Asunto(s)
Enfermedades Cardiovasculares/mortalidad , Trastorno Depresivo/mortalidad , Pobreza/estadística & datos numéricos , Factores Socioeconómicos , Adulto , Anciano , Enfermedades Cardiovasculares/psicología , Causas de Muerte , Estudios de Cohortes , Trastorno Depresivo/psicología , Femenino , Estudios de Seguimiento , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Pobreza/psicología , Factores de Riesgo , Factores Sexuales
13.
Indian J Crit Care Med ; 24(4): 283-284, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32565641

RESUMEN

How to cite this article: Xiao-Bo H, Poonyathawon S, Semedi BP, Xiao-Yi Z, Wei F, Da-Wei W, et al. International-focused Online Forum: A Good Way to Jointly Manage the COVID-19 Pandemic for Global Critical Care Community. Indian J Crit Care Med 2020;24(4):283-284.

14.
Lancet ; 395(10226): 795-808, 2020 03 07.
Artículo en Inglés | MEDLINE | ID: mdl-31492503

RESUMEN

BACKGROUND: Global estimates of the effect of common modifiable risk factors on cardiovascular disease and mortality are largely based on data from separate studies, using different methodologies. The Prospective Urban Rural Epidemiology (PURE) study overcomes these limitations by using similar methods to prospectively measure the effect of modifiable risk factors on cardiovascular disease and mortality across 21 countries (spanning five continents) grouped by different economic levels. METHODS: In this multinational, prospective cohort study, we examined associations for 14 potentially modifiable risk factors with mortality and cardiovascular disease in 155 722 participants without a prior history of cardiovascular disease from 21 high-income, middle-income, or low-income countries (HICs, MICs, or LICs). The primary outcomes for this paper were composites of cardiovascular disease events (defined as cardiovascular death, myocardial infarction, stroke, and heart failure) and mortality. We describe the prevalence, hazard ratios (HRs), and population-attributable fractions (PAFs) for cardiovascular disease and mortality associated with a cluster of behavioural factors (ie, tobacco use, alcohol, diet, physical activity, and sodium intake), metabolic factors (ie, lipids, blood pressure, diabetes, obesity), socioeconomic and psychosocial factors (ie, education, symptoms of depression), grip strength, and household and ambient pollution. Associations between risk factors and the outcomes were established using multivariable Cox frailty models and using PAFs for the entire cohort, and also by countries grouped by income level. Associations are presented as HRs and PAFs with 95% CIs. FINDINGS: Between Jan 6, 2005, and Dec 4, 2016, 155 722 participants were enrolled and followed up for measurement of risk factors. 17 249 (11·1%) participants were from HICs, 102 680 (65·9%) were from MICs, and 35 793 (23·0%) from LICs. Approximately 70% of cardiovascular disease cases and deaths in the overall study population were attributed to modifiable risk factors. Metabolic factors were the predominant risk factors for cardiovascular disease (41·2% of the PAF), with hypertension being the largest (22·3% of the PAF). As a cluster, behavioural risk factors contributed most to deaths (26·3% of the PAF), although the single largest risk factor was a low education level (12·5% of the PAF). Ambient air pollution was associated with 13·9% of the PAF for cardiovascular disease, although different statistical methods were used for this analysis. In MICs and LICs, household air pollution, poor diet, low education, and low grip strength had stronger effects on cardiovascular disease or mortality than in HICs. INTERPRETATION: Most cardiovascular disease cases and deaths can be attributed to a small number of common, modifiable risk factors. While some factors have extensive global effects (eg, hypertension and education), others (eg, household air pollution and poor diet) vary by a country's economic level. Health policies should focus on risk factors that have the greatest effects on averting cardiovascular disease and death globally, with additional emphasis on risk factors of greatest importance in specific groups of countries. FUNDING: Full funding sources are listed at the end of the paper (see Acknowledgments).


Asunto(s)
Enfermedades Cardiovasculares/mortalidad , Países Desarrollados , Países en Desarrollo , Política de Salud , Factores Socioeconómicos , Adulto , Anciano , Enfermedades Cardiovasculares/prevención & control , Estudios de Cohortes , Escolaridad , Exposición a Riesgos Ambientales , Femenino , Conductas Relacionadas con la Salud , Humanos , Hipertensión/complicaciones , Renta , Masculino , Persona de Mediana Edad , Pobreza , Estudios Prospectivos , Factores de Riesgo
15.
Behav Brain Res ; 359: 457-466, 2019 02 01.
Artículo en Inglés | MEDLINE | ID: mdl-30468789

RESUMEN

Behavioral studies have demonstrated that extinguished conditioned eyeblink responses (CR) can spontaneously recover after extinction. However, the neural mechanisms underlying this process are still unclear. We have shown that spontaneous cerebellar theta activity was predictive of subsequent CR extinction. Here, we sought to further evaluate the association between spontaneous recovery and cerebellar theta activity in behaving guinea pigs. It was found that trace conditioning training significantly diminished the degree of spontaneous recovery during extinction sessions as compared to delay training. Moreover, by recording local field potential in the cerebellum of guinea pigs undergoing an eyeblink conditioning extinction task, we found that spontaneous recovery of delay-paradigm CRs was associated with transiently decreased CS-evoked theta activity in the cerebellum. These findings suggest that decreased CS-evoked cerebellar theta activity may contribute to the neural process that is important for the spontaneous recovery of extinguished motor memory. Future studies are needed to clarify the neural mechanism underlying changed cerebellar theta activity during altered behavioral contingencies.


Asunto(s)
Cerebelo/fisiología , Condicionamiento Palpebral/fisiología , Ritmo Teta/fisiología , Animales , Electrocorticografía , Extinción Psicológica/fisiología , Cobayas , Masculino , Distribución Aleatoria
16.
Eur Heart J Case Rep ; 2(2): yty028, 2018 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-31020111

RESUMEN

INTRODUCTION: Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is a rare but serious congenital coronary abnormality, Takeuchi repair is an alternative treatment option for this anomaly in certain situations, it is reported that baffle leak is the most common complication after Takeuchi repair, and some of this complication require surgical reoperation. CASE PRESENTATION: In this case, a 43-year-old woman diagnosed with ALCAPA underwent Takeuchi procedure 6 months ago, 4 months after the procedure, the patient complained of chest pain on exertion and was confirmed to have baffle leak, and then we treated this complication successfully by percutaneous transcatheter closure. DISCUSSION: Baffle leak is the most common complication after Takeuchi procedure of ALCAPA, some of them require surgical reoperation. In this case, we introduce a new method, percutaneous transcatheter closure, to treat the baffle leak. To our knowledge, this is the first reported case of transcatheter closure for baffle leak after Takeuchi repair, which may be an alternative treatment option for the baffle leak after Takeuchi repair of this rare congenital coronary anomaly.

17.
Hua Xi Kou Qiang Yi Xue Za Zhi ; 35(2): 155-161, 2017 Apr 01.
Artículo en Chino | MEDLINE | ID: mdl-28682545

RESUMEN

OBJECTIVE: This study aimed to systematically evaluate the oral health status of patients suffering from chronic renal failure and undergoing hemodialysis (HD). METHODS: Electronic databases, namely, China National Knowledge Infrastructure, Wanfang Data base, PubMed, Web of Science, and Cochrane Library, were searched until May 2016 for cross-sectional and case-control studies that investigated the oral health status of patients suffering from chronic renal failure and undergoing HD. Two reviewers independently screened the trials, extracted the data, assessed the quality, and conducted a Meta-analysis with RevMan 5.3 in accordance with the inclusion and exclusion criteria. RESULTS: Sixteen studies satisfied the eligibility criteria. Meta-analysis revealed that plaque index (MD=0.62, 95%CI: 0.51-0.72), calculus index (MD=1.09, 95%CI: 0.56-1.63), probing depth (MD=0.63, 95%CI: 0.29-0.98), and attachment loss (MD=0.63, 95%CI: 0.56-0.69) were significantly higher in the patients undergoing HD than in the healthy control group (P<0.01). No significant differences in decayed missing filled teeth (MD=1.12, 95%CI: -1.08-3.32) were observed between the patients undergoing HD and the healthy control group (P=0.32). CONCLUSIONS: The prevalence of caries in patients undergoing HD is similar to that in the healthy control group. However, these patients are at a higher risk of acquiring periodontal diseases than the healthy control group. Thus, the oral health status of these patients should be further evaluated in clinical treatments.


Asunto(s)
Índice de Placa Dental , Estado de Salud , Salud Bucal , Diálisis Renal , Estudios de Casos y Controles , China , Estudios Transversales , Caries Dental , Humanos , Enfermedades Periodontales , Pérdida de Diente
18.
IEEE Trans Cybern ; 47(11): 3658-3668, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27411233

RESUMEN

The economy of scale provided by cloud attracts a growing number of organizations and industrial companies to deploy their applications in cloud data centers (CDCs) and to provide services to users around the world. The uncertainty of arriving tasks makes it a big challenge for private CDC to cost-effectively schedule delay bounded tasks without exceeding their delay bounds. Unlike previous studies, this paper takes into account the cost minimization problem for private CDC in hybrid clouds, where the energy price of private CDC and execution price of public clouds both show the temporal diversity. Then, this paper proposes a temporal task scheduling algorithm (TTSA) to effectively dispatch all arriving tasks to private CDC and public clouds. In each iteration of TTSA, the cost minimization problem is modeled as a mixed integer linear program and solved by a hybrid simulated-annealing particle-swarm-optimization. The experimental results demonstrate that compared with the existing methods, the optimal or suboptimal scheduling strategy produced by TTSA can efficiently increase the throughput and reduce the cost of private CDC while meeting the delay bounds of all the tasks.

20.
Graefes Arch Clin Exp Ophthalmol ; 253(8): 1307-11, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25311650

RESUMEN

PURPOSE: To evaluate the characteristics and outcomes of drunken patients treated for ocular rupture, and to compare these results to patients injured without alcohol consumption. DESIGN AND METHODS: The medical records of 182 patients with or without alcohol consumption before injury who were treated and followed up because of ocular rupture at the Affiliated Hospital of Weifang Medical University from October 2007 to October 2011 were evaluated retrospectively. The characteristics and outcomes of 45 alcohol-related injury patients were compared with the rest in the cohort. The clinical data included in this study were: anatomic sites and length of the wound, involvement of ocular adnexa injuries, evisceration rate, and final mean visual acuity. RESULTS: Wound locations were significantly different between the alcohol-related group and the non-alcohol-related one. Compared with the non-alcohol-related ocular rupture population, the anatomic sites of the drunken patients were more likely to be located at zone I and zone II (60.0 vs 40.1 %; χ2 = 5.39,P < 0.05). The difference of wound length between the alcohol-related group and the non-alcohol-related one was significant. The alcohol-related patients had a longer wound length (Z = -8.590,P < 0.05). Compared with the non-alcohol population, the alcohol-consuming patients were more likely to suffer adnexa injuries (84.4 vs 59.8 %; χ2 = 5.86,P < 0.05), and had worse final visual acuities (Z = -7.195,P < 0.05). The evisceration rate of the alcohol-related patients was significantly higher than the non-alcohol patients (24.4 vs 9.4 %; χ2 = 6.62,P < 0.05). CONCLUSIONS: Drinking more easily leads to injury of the front part of eyes. Moreover, the drunken patients had a worse visual acuity outcome, longer wound length, higher evisceration rate, and were more prone to endure adnexa injuries. The importance of prevention and education to recognize the hazards of drinking cannot be overemphasized.


Asunto(s)
Trastornos Relacionados con Alcohol/patología , Lesiones de la Cornea/patología , Lesiones Oculares Penetrantes/patología , Limbo de la Córnea/lesiones , Esclerótica/lesiones , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Trastornos Relacionados con Alcohol/etiología , Trastornos Relacionados con Alcohol/cirugía , Niño , Preescolar , Lesiones de la Cornea/etiología , Lesiones de la Cornea/cirugía , Evisceración del Ojo , Lesiones Oculares Penetrantes/etiología , Lesiones Oculares Penetrantes/cirugía , Párpados/lesiones , Femenino , Humanos , Limbo de la Córnea/patología , Limbo de la Córnea/cirugía , Masculino , Persona de Mediana Edad , Traumatismos del Nervio Óptico/etiología , Traumatismos del Nervio Óptico/patología , Traumatismos del Nervio Óptico/cirugía , Órbita/lesiones , Estudios Retrospectivos , Rotura , Esclerótica/patología , Esclerótica/cirugía , Agudeza Visual/fisiología
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...