Recently, two dimensional In Se attracts great attentions as potential hydrogen production photocatalysts.Here, comprehensive investigations on the hydrogen evolution reaction activity of In Se monolayer with3 d trans...Recently, two dimensional In Se attracts great attentions as potential hydrogen production photocatalysts.Here, comprehensive investigations on the hydrogen evolution reaction activity of In Se monolayer with3 d transition metal doping and biaxial strain were performed based on the density functional theory.Transition metal dopants significantly increase the bonding strength between H and Se, and then adjust the hydrogen adsorption free energy to 0.02 e V by Zn doping. The enhanced hydrogen evolution reaction activity results from less electron occupying H 1 s-Se 4 pzanti-bonding states, which is well correlated with the pzband center level. Importantly, the universal scalling law was proposed to descript the evolution of hydrogen adsorption free energy including both doping and strain effects. Moreover, with appropriate band alignment, optical absorption, and carriers separation ability, Zn doped In Se monolayer is considered as a promising candidate of visible-light photocatalyst for hydrogen production.展开更多
The objective of this study was to identify risk factors and study the causes of neonatal mortality of LBW newborns referred to the Institute of Nutrition and Child Health. Material and Methods: This is a prospective ...The objective of this study was to identify risk factors and study the causes of neonatal mortality of LBW newborns referred to the Institute of Nutrition and Child Health. Material and Methods: This is a prospective descriptive and analytical study from March 1 to August 31, 2015, involving 250 newborns referred to the Neonatology Department of the Institute of Child Nutrition and Health (INSE). Results: During our study period, we recorded 1169 newborns, 250 of whom were referred, representing a referral frequency of 21.38%. The overall mortality rate for transferring newborns was 46.8%. Risk factors associated with neonatal mortality were gravidity (p = 0.0019), parity (p = 0.0323), occupational activities requiring physical effort (p = 0.0257), birth weight (p = 0.0008) and prematurity (p = 0.0039). Conclusion: Neonatal mortality associated with referrals is a major health problem in developing countries. There is currently no doubt that it is possible to significantly reduce perinatal mortality and morbidity rates by organizing the identification of “mother-child” couples at risk, to refer them intently to centres better equipped with technical and human resources to care for them.展开更多
Introduction: The birth of a baby is a moment of joy and celebration. However, the neonatal period is a very delicate phase of life. Neonatal mortality rates remain high in low-income countries. In Guinea, after 20 ye...Introduction: The birth of a baby is a moment of joy and celebration. However, the neonatal period is a very delicate phase of life. Neonatal mortality rates remain high in low-income countries. In Guinea, after 20 years, this rate has fallen from 34.2% in 1998 to 32% in 2018. Objective: To identify the main risk factors for neonatal mortality. Methods: This was an observational, analytical case-control study, lasting 6 months from January 1 to June 30, 2019, conducted at the Institut de Nutrition et de la Santé de l’Enfant (INSE) at Donka National Hospital. Results: We collected 242 cases and 242 controls, i.e. a total of 484 records. 748 patients were registered, with 32.35% deaths. 82.86% of deaths occurred in the early neonatal period. Statistical analysis revealed the main risk factors: prematurity (RQ 7.39 95% CI 3.27 - 16.61 p = 0.0000003), hypothermia (RQ 2.29 95% CI 1.51 - 3.46 p = 0.0001), acute fetal distress (RQ 2.13 95% CI 1.33 - 3.43 p = 0.0016), low birth weight (QR 1.91 95% CI 1.12 - 3.24 p = 0.016), home birth (QR 3.26 95% CI 1.25 - 8.46 p = 0.015). Conclusion: Neonatal mortality is a health problem in the INSE neonatology department. To reduce the mortality rate in this referral facility, it is essential to equip it and provide ongoing training for staff.展开更多
基金National Natural Science Foundation of China(52272006,52371193,52001231)Shanghai Academic/Technology Research Leader(23XD1421200)+3 种基金Oriental Scholars of Shanghai Universities(TP2022122)Space Application System of China Manned Space Program,Shanghai Rising-star Program(23QA1403900)Chenguang Program supported by Shanghai Education Development Foundation&Shanghai Municipal Education CommissionOpen Research Fund of Key Laboratory of Polar Materials and Devices,Ministry of Education。
基金supported by the National Natural Science Foundation of China(11804023)the Natural Science Foundation of Tianjin(18JCQNJC02700)。
文摘Recently, two dimensional In Se attracts great attentions as potential hydrogen production photocatalysts.Here, comprehensive investigations on the hydrogen evolution reaction activity of In Se monolayer with3 d transition metal doping and biaxial strain were performed based on the density functional theory.Transition metal dopants significantly increase the bonding strength between H and Se, and then adjust the hydrogen adsorption free energy to 0.02 e V by Zn doping. The enhanced hydrogen evolution reaction activity results from less electron occupying H 1 s-Se 4 pzanti-bonding states, which is well correlated with the pzband center level. Importantly, the universal scalling law was proposed to descript the evolution of hydrogen adsorption free energy including both doping and strain effects. Moreover, with appropriate band alignment, optical absorption, and carriers separation ability, Zn doped In Se monolayer is considered as a promising candidate of visible-light photocatalyst for hydrogen production.
文摘The objective of this study was to identify risk factors and study the causes of neonatal mortality of LBW newborns referred to the Institute of Nutrition and Child Health. Material and Methods: This is a prospective descriptive and analytical study from March 1 to August 31, 2015, involving 250 newborns referred to the Neonatology Department of the Institute of Child Nutrition and Health (INSE). Results: During our study period, we recorded 1169 newborns, 250 of whom were referred, representing a referral frequency of 21.38%. The overall mortality rate for transferring newborns was 46.8%. Risk factors associated with neonatal mortality were gravidity (p = 0.0019), parity (p = 0.0323), occupational activities requiring physical effort (p = 0.0257), birth weight (p = 0.0008) and prematurity (p = 0.0039). Conclusion: Neonatal mortality associated with referrals is a major health problem in developing countries. There is currently no doubt that it is possible to significantly reduce perinatal mortality and morbidity rates by organizing the identification of “mother-child” couples at risk, to refer them intently to centres better equipped with technical and human resources to care for them.
文摘Introduction: The birth of a baby is a moment of joy and celebration. However, the neonatal period is a very delicate phase of life. Neonatal mortality rates remain high in low-income countries. In Guinea, after 20 years, this rate has fallen from 34.2% in 1998 to 32% in 2018. Objective: To identify the main risk factors for neonatal mortality. Methods: This was an observational, analytical case-control study, lasting 6 months from January 1 to June 30, 2019, conducted at the Institut de Nutrition et de la Santé de l’Enfant (INSE) at Donka National Hospital. Results: We collected 242 cases and 242 controls, i.e. a total of 484 records. 748 patients were registered, with 32.35% deaths. 82.86% of deaths occurred in the early neonatal period. Statistical analysis revealed the main risk factors: prematurity (RQ 7.39 95% CI 3.27 - 16.61 p = 0.0000003), hypothermia (RQ 2.29 95% CI 1.51 - 3.46 p = 0.0001), acute fetal distress (RQ 2.13 95% CI 1.33 - 3.43 p = 0.0016), low birth weight (QR 1.91 95% CI 1.12 - 3.24 p = 0.016), home birth (QR 3.26 95% CI 1.25 - 8.46 p = 0.015). Conclusion: Neonatal mortality is a health problem in the INSE neonatology department. To reduce the mortality rate in this referral facility, it is essential to equip it and provide ongoing training for staff.
