搜索结果: 16-30 共查到“理学 aging”相关记录45条 . 查询时间(0.093 秒)
Iowa State University researchers discover surprisingly wide variation across species in genetic systems that influence aging
Iowa State University researchers surprisingly wide variation across species genetic systems
2015/6/18
A new Iowa State University study focusing on insulin signaling uncovered surprising genetic diversity across reptiles, birds and mammals.The research sets the stage for an improved understanding of m...
Physicochemical changes in pyrogenic organic matter (biochar) after 15 months of field aging
Add into the fire organic matter and biochar soil chemistry crop yield biochar mixture
2015/1/6
Predicting the effects of pyrogenic organic matter (OM) addition (either natural or intentional as in the case of biochar amendment) on soil chemistry and crop yields has been hampered by a lack of un...
Cocoa flavanol consumption improves cognitive function, blood pressure control, and metabolic profile in elderly subjects: the Cocoa, Cognition, and Aging (CoCoA) Study—a randomized controlled trial
blood pressure cocoa flavanols cognitive function insulin resistance lipid peroxidation
2018/12/24
Background: Recent evidence has indicated that flavanol consumption may have many health benefits in humans, including improved cognitive activities.
Development of a parameterization of black carbon aging for use in general circulation models
parameterization of black carbon aging general circulation models
2014/12/16
A parameterization of black carbon (BC) aging in the atmosphere is developed for use in general circulation models (GCMs) that separately treat hydrophobic BC and hydrophilic BC modes but do not expli...
Aging Cell：胚胎生物学研究组揭示皮肤干细胞衰老新机制
Aging Cell 胚胎生物学 皮肤干细胞 新机制
2011/10/11
成体皮肤干细胞的研究对于治疗烧伤、糖尿病引起的皮肤溃疡、皮肤衰老以及构建人类组织工程皮肤都具有重要意义。目前，应用皮肤干细胞进行组织工程学皮肤构建以及皮肤疾病的治疗尚处于初始阶段，但与此同时，临床对于成体皮肤干细胞应用的需求却十分迫切。不同种类的皮肤干细胞在体外的自我更新以及分化能力的提高是目前急需解决的关键科学问题。
Aging through hierarchical coalescence in the East model
kinetically constrainedmodels non-equilibrium dynamics coalescence metastability
2011/2/25
We rigorously analyze the low temperature non-equilibrium dynamics of the East model, a special example of a one dimensional oriented kinetically constrained particle model, when the initial distribut...
A secondary organic aerosol formation model considering successive oxidation aging and kinetic condensation of organic compounds: global scale implications
A secondary organic aerosol formation model successive oxidation aging organic compounds global scale
2011/2/25
The widely used two-product secondary organic aerosol (SOA) formation model has been extended in this study to consider the volatility changes of secondary organic gases (SOG) arising from the aging p...
Aging of a Homogeneously Quenched Colloidal Glass-forming Liquid
Aging Homogeneously Quenched Colloidal Glass-forming Liquid
2010/11/24
The non-equilibrium self-consistent generalized Langevin equation theory of colloid dynamics
is used to describe the non-stationary aging processes occurring in a suddenly quenched model
colloidal l...
Aging is a fundamental aspect of living systems that undergo a progressive deterioration of physiological function with age and an increase of vulnerability to disease and death. Living systems, know...
Microbial carbon isotope fractionation to produce extraordinarily heavy methane in aging hydrothermal plumes over the southwestern Okinawa Trough
hydrothermal plume chemistry microbial methane oxidation carbon isotope fractionation southern Okinawa Trough
2017/8/9
Within neutrally buoyant hydrothermal plumes derived from the Yonaguni Knoll IV hydrothermal field (24°51′N, 122°42′E, D = 1,370-1,385 m) in the southwestern Okinawa Trough back-arc basin, we obtained...
The importance of aerosol mixing state and size-resolved composition on CCN concentration and the variation of the importance with atmospheric aging of aerosols
aerosol mixing state size-resolved composition CCN concentration atmospheric aerosols
2010/8/16
Aerosol microphysics, chemical composition, and CCN concentrations were measured at the T0 urban supersite in Mexico City during Megacity Initiative: Local and Global Research Observations (MILAGRO) i...
Microscopic characterization of carbonaceous aerosol particle aging in the outflow from Mexico City
carbonaceous aerosol particle outflow Mexico City
2010/2/21
This study was part of the Megacities Initiative: Local and Global Research Observations (MILAGRO) field campaign conducted in Mexico City metropolitan area during spring 2006. The physical and chemic...
Medical Isotopes Shortage Reveals Larger Issue--IAEA Meeting Addresses Global Issue of Aging Nuclear Research Reactors
Medical Isotopes Shortage IAEA Meeting Nuclear Research Reactors
2009/10/21
Medical isotopes, tiny radioactive particles injected into the human body to diagnose and treat a number of diseases, are the backbone of nuclear medicine.Demand for medical procedures using isotopes ...
The heterogeneous reaction of hydroxyl radicals with sub-micron squalane particles: a model system for understanding the oxidative aging of ambient aerosols
heterogeneous reaction hydroxyl radicals sub-micron squalane particles ambient aerosols
2009/6/2
The heterogeneous reaction of OH radicals with sub-micron squalane particles, in the presence of O2, is used as a model system to explore the fundamental chemical mechanisms that control the oxidative...
Aging of allochthonous organic carbon regulates bacterial production in unproductive boreal lakes
allochthonous organic carbo production in unproductive
2014/4/18
We calculated average aquatic dissolved organic carbon (DOC) age (the time span from soil discharge to
observation) in water from the inlets and outlets of two unproductive Swedish lakes at different...