The increasing incidence of neurodegenerative diseases(NDs)and the constraints of existing treatment methods have spurred a keen interest in investigating alternative therapies.Medicinal plants,renowned for their long...The increasing incidence of neurodegenerative diseases(NDs)and the constraints of existing treatment methods have spurred a keen interest in investigating alternative therapies.Medicinal plants,renowned for their long-standing use in traditional medicine,offer a hopeful avenue for discovering new neuroprotective agents.This study emphasizes the potential neuroprotective characteristics of edible fruit plants in Bangladesh,specifically focusing on their traditional folk medicine uses for neurological disorders.This study provides an in-depth overview of the different types of edible fruit trees in Bangladesh and their phytochemicals,including flavonoids,terpenoids,and phenolic acids.This work examines the scientific data supporting the neuroprotective properties of bioactive chemicals from plants.It further explores the mechanisms by which these compounds work to counteract oxidative stress,decrease inflammation,and stimulate neurogenesis.Moreover,the study investigates toxicological characteristics and bioactive components of some fruits,emphasizing the importance of further investigation to measure their safety profile comprehensively.This thorough study highlights the potential benefits of Bangladesh's edible fruit trees as a rich source of neuroprotective chemicals.It also shows that additional research might lead to novel approaches for improving brain functioning and preventing NDs.展开更多
Vanadium redox flow battery(VRB),as the most promising large-scale electrical energy storage units,has attracted extensive attention.Amphoteric ion exchange membrane(AIEM),as the core part of VRB,separates electrolyte...Vanadium redox flow battery(VRB),as the most promising large-scale electrical energy storage units,has attracted extensive attention.Amphoteric ion exchange membrane(AIEM),as the core part of VRB,separates electrolyte on both sides of electrolytic tank and conducts H+.The AIEM with cation and anion groups possesses excellent performances,such as high ion conductivity(σ),low vanadium ion permeability(Pvn+),relative stability and low cost.However,the performance of AIEM directly depends on the chemical structure of polymers.In addition to ensuring foundational physical performance,ion selectivity of AIEM is significant since the crossover of vanadium ion with various valences may reduce the battery capacity.In this paper,AIEMs for VRB and their chemical structures as well as synthesis approaches to realize all kinds of high-performing AIEMs are reviewed.The current trend and future direction of prospective materials for the VRB separators are documented in detail as well.展开更多
This paper presents an experimental investigation of the circulation of the horseshoe vortex system within the equilibrium scour hole at a circular pier, with the data measured by an acoustic Doppler velocimeter （ADV...This paper presents an experimental investigation of the circulation of the horseshoe vortex system within the equilibrium scour hole at a circular pier, with the data measured by an acoustic Doppler velocimeter （ADV）. Velocity vector plots and vorticity contours of the flow field on the upstream plane of symmetry （y = 0 cm） and on the planes ：e3 cm away from the plane of symmetry Cv = ~3 cm） are presented. The vorticity and circulation of the horseshoe vortices were determined using the forward difference technique and Stokes theorem, respectively. The results show that the magnitudes of circulations are similar on the planes y = 3 cm and y = -3 cm, which are less than those on the plane y = 0 cm. The circulation decreases with the increase of flow shallowness, and increases with the densimetric Froude number. It also increases with the pier Reynolds number at a constant densimetric Froude number, or at a constant flow shallowness. The relative vortex strength （dimensionless circulation） decreases with the increase of the pier Reynolds number. Some empirical equations are proposed based on the results. The predicted circulation values with these equations match the measured data, which indicates that these equations can be used to estimate the circulation in future studies.展开更多
文摘The increasing incidence of neurodegenerative diseases(NDs)and the constraints of existing treatment methods have spurred a keen interest in investigating alternative therapies.Medicinal plants,renowned for their long-standing use in traditional medicine,offer a hopeful avenue for discovering new neuroprotective agents.This study emphasizes the potential neuroprotective characteristics of edible fruit plants in Bangladesh,specifically focusing on their traditional folk medicine uses for neurological disorders.This study provides an in-depth overview of the different types of edible fruit trees in Bangladesh and their phytochemicals,including flavonoids,terpenoids,and phenolic acids.This work examines the scientific data supporting the neuroprotective properties of bioactive chemicals from plants.It further explores the mechanisms by which these compounds work to counteract oxidative stress,decrease inflammation,and stimulate neurogenesis.Moreover,the study investigates toxicological characteristics and bioactive components of some fruits,emphasizing the importance of further investigation to measure their safety profile comprehensively.This thorough study highlights the potential benefits of Bangladesh's edible fruit trees as a rich source of neuroprotective chemicals.It also shows that additional research might lead to novel approaches for improving brain functioning and preventing NDs.
基金the National Natural Science Foundation of China(Nos.51503187,21504037 and 51603194)the National key R&D Project(No.2016YFE0102700)+3 种基金the Shanxi provincial foundation for science and technology research(Nos.201601D021058,201701D221050,20181101006,20181102019)Partial support is also from the NIMHD-RCMI grant number 5G12MD007595 from the National Institute of Minority HealthHealth Disparities and the NIGMS-BUILD(No.8UL1GM118967)National Science Foundation(No.1700429)。
文摘Vanadium redox flow battery(VRB),as the most promising large-scale electrical energy storage units,has attracted extensive attention.Amphoteric ion exchange membrane(AIEM),as the core part of VRB,separates electrolyte on both sides of electrolytic tank and conducts H+.The AIEM with cation and anion groups possesses excellent performances,such as high ion conductivity(σ),low vanadium ion permeability(Pvn+),relative stability and low cost.However,the performance of AIEM directly depends on the chemical structure of polymers.In addition to ensuring foundational physical performance,ion selectivity of AIEM is significant since the crossover of vanadium ion with various valences may reduce the battery capacity.In this paper,AIEMs for VRB and their chemical structures as well as synthesis approaches to realize all kinds of high-performing AIEMs are reviewed.The current trend and future direction of prospective materials for the VRB separators are documented in detail as well.
文摘This paper presents an experimental investigation of the circulation of the horseshoe vortex system within the equilibrium scour hole at a circular pier, with the data measured by an acoustic Doppler velocimeter （ADV）. Velocity vector plots and vorticity contours of the flow field on the upstream plane of symmetry （y = 0 cm） and on the planes ：e3 cm away from the plane of symmetry Cv = ~3 cm） are presented. The vorticity and circulation of the horseshoe vortices were determined using the forward difference technique and Stokes theorem, respectively. The results show that the magnitudes of circulations are similar on the planes y = 3 cm and y = -3 cm, which are less than those on the plane y = 0 cm. The circulation decreases with the increase of flow shallowness, and increases with the densimetric Froude number. It also increases with the pier Reynolds number at a constant densimetric Froude number, or at a constant flow shallowness. The relative vortex strength （dimensionless circulation） decreases with the increase of the pier Reynolds number. Some empirical equations are proposed based on the results. The predicted circulation values with these equations match the measured data, which indicates that these equations can be used to estimate the circulation in future studies.
