Results 141 to 150 of about 691,747 (266)

Can the removal of VAT Exemptions support the Poor? The Case of Niger [PDF]

open access: yes
In order to have the public funds necessary for its development, Niger is examining the possibility of expanding its VAT tax base to exempted goods and basic food products.
Celine DE QUATREBARBES   +2 more
core   +3 more sources

Is the Green Revolution Vanishing? Empirical Evidence from TFP Analysis for Rice [PDF]

open access: yes
A serious concern has been raised recently on the long run sustainability of the productivity effects of Green Revolution technologies in the light of decelerating trend in the yield growth of rice since the mid 1980s under irrigated ecosystem.
Achoth, Lalith, Adlas, J.
core   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

open access: yesAdvanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He   +5 more
wiley   +1 more source

3D‐Printed Porous Hydroxyapatite Formed via Enzymatic Mineralization

open access: yesAdvanced Functional Materials, EarlyView.
Bone combines lightness, strength, and the ability to heal, inspiring new materials design. This work introduces a room‐temperature, enzyme‐mediated 3D printing method to create porous hydroxyapatite scaffolds. The process avoids energy‐intensive sintering, preserves bioactivity, and allows control over porosity and mineralization.
Francesca Bono   +6 more
wiley   +1 more source

Biomimetic Nanovaccine Integrating Dendritic Cell Exosomes with Tumor Cell Membranes for Sustained Prophylaxis Against Glioblastoma

open access: yesAdvanced Functional Materials, EarlyView.
We have developed DEX/GM, an all‐natural, personalizable hybrid vaccine designed by coating dendritic cell‐derived exosomes (DEX) onto tumor cell membranes (GM) for sustained prophylaxis against glioblastoma (GBM). ABSTRACT Glioblastoma (GBM), one of the most aggressive and lethal brain tumors, remains incurable with a poor clinical prognosis.
Shanshan Li   +6 more
wiley   +1 more source

Determining the Effective Factors in Water Use Efficiency (WUE) of Common Bean (Phaseolus vulgaris L.), Sesame (Sesamum indicum L.) and Maize (Zea mays L.) in Response to Humic Acid Application and Deficit Irrigation

open access: yesعلوم آب و خاک, 2018
Factor analysis is one of the multivariate statistical techniques that considers the interrelationships between apparently irrelevant variables and helps researchers to find the hidden reasons for the occurrence of an event.
M. Jahan, B. Amiri
doaj  

2008 PRECISION AGRICULTURAL SERVICES DEALERSHIP SURVEY RESULTS [PDF]

open access: yes
Precision technologies are now well-integrated into the agricultural industry – both at the farm level and at the crop input dealer level. No longer are crop input dealers only using the technologies to bring new services to their customers, they are ...
Jay T. Akridge, Linda D. Whipker
core  

Bioinspired Stabilization of Fluorescent Au@SiO2 Tracers for Multimodal Biological Imaging

open access: yesAdvanced Functional Materials, EarlyView.
This study demonstrates a bioinspired stabilization strategy for fluorescent gold‐silica nanoparticles. Inspired by natural biosilica maturation, high‐temperature calcination transforms the silica shells, preventing dissolution in cell culture media and intracellular environments.
Wang Sik Lee   +5 more
wiley   +1 more source

Constraints to growth in Malawi [PDF]

open access: yes
This paper applies a growth diagnostics approach to identify the most binding constraints to private-sector growth in Malawi - a small, landlocked country in Southern Africa with one of the lowest per capita incomes in the world.
Hanmer, Lucia, Lea, Nicholas
core  

Mechanoregulatory Effects of Cell‐Scale Microwells on Epithelial Cell Phenotype

open access: yesAdvanced Functional Materials, EarlyView.
In small polycaprolactone microwells, A549 epithelial cells span well edges, in contrast to cells growing on flat substrates. Focal adhesion sites (yellow) concentrate at topographic boundaries, while cytoskeletal tension (magenta stress fibers) is transmitted to the nucleus (blue), reducing nuclear sphericity.
Ruiwen He   +10 more
wiley   +1 more source

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