Results 201 to 210 of about 1,105,976 (310)

TRANSFORMATION OF FALLOW SYSTEMS UNDER POPULATION PRESSURE

open access: yes
In a fallow-cultivation model with biomass regeneration, we find the population-poverty-degradation linkage via the discount rate: slight increases in the discount rate result in increased cropping frequency and much lower soil fertility.
Thomas, Timothy S.
core  

Engineering Pendant Group Chemistry to Control Hydrophilicity and Oxidative Degradation of Thioketal‐Based Biomaterials

open access: yesAdvanced Functional Materials, EarlyView.
Thioketal (TK) polymers are promising biomaterials due to their selective biodegradation by reactive oxygen species (ROS), but they respond slowly to physiologic doses of ROS. Here, the TK bond's pendant groups are modified to enhance the degradation of TK‐based implants both in vitro and in vivo.
Karina A. Bruce   +6 more
wiley   +1 more source

Democracy, traditional leadership and the International Economy in South Africa

open access: yes
The paper argues that in order to adequately analyse the development of postcolonial democracy - in this case South Africa - a theoretical model has to take into account the context within which that democratic experiment finds itself in. This context is
Thomas Koelble
core   +1 more source

Dietary Clusters and Mortality Risk in a Chinese Population: The Role of Type 2 Diabetes and Hypertension. [PDF]

open access: yesNutrients
Wei C   +14 more
europepmc   +1 more source

Nanoengineered Binetworks in Multifunctional Anionic Block Polymer Mesoblends for Improved Mechanical Properties

open access: yesAdvanced Functional Materials, EarlyView.
Mesoblends consist of a nanostructured polymer into which a second polymer is imbibed with a selective solvent. In this work, a solvent‐templatable pentablock terpolymer possessing a sulfonated midblock is modified with a hydrophilic polymer that is photocrosslinked in situ, yielding a hierarchical binetwork.
Kacie M. Wells   +3 more
wiley   +1 more source

Cultural Traditions in the Pottery of the Eneolithic Volga Population

open access: yesАрхеология евразийских степей
The article deals with the generalization of information on pottery technology of the Volga region population in the Eneolithic period, got through technical-technological analysis. The data on 1187 vessels from 23 Eneolithic monuments (sites and burial grounds) of the Lower Volga region and the south of the Middle Volga are involved.
openaire   +1 more source

Frequency of diseases and use of medicinal plants in adults in a rural Peruvian community. [PDF]

open access: yesFront Public Health
Reyna Gonzales CM   +4 more
europepmc   +1 more source

Glissile Interphase Boundaries Enable Collective Phase Switching in Epitaxial Polar Oxides

open access: yesAdvanced Functional Materials, EarlyView.
A triple point is identified in the phase diagram of low‐symmetry epitaxial BiFeO3 thin film along with an extended regime of phase competition associated with a flattened energy landscape. The electromechanical response is shown to be governed by correlated interphase‐boundary motion, including scale‐free avalanche dynamics characteristic of systems ...
Mohammad Moein Seyfouri   +11 more
wiley   +1 more source

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