Results 61 to 70 of about 1,061,714 (256)

GLOBUS: [Early explorer globe] National Geographic ; manufactured by Columbus Globes ; produced by Spherical Concepts Inc.

open access: yes, 2009
1 Globus, col. Llum interior. El mapa polític està sempre a la vista, el mapa físic apareix en encendre la llum.
National Geographic Society
core   +1 more source

Analysis of Evolving Carbon Stock Trends and Influencing Factors in Chongqing under Future Scenarios

open access: yesLand
The relationship between land use changes and regional carbon storage is closely linked. Identifying evolving trends concerning and influencing factors on carbon storage under future scenarios is key in order to achieve the “dual carbon” goals.
Kangwen Zhu   +7 more
doaj   +1 more source

Temporal and Spatial Changes and Driving Factors of Soil Erosion in the Middle Reaches of the Yellow River

open access: yesShuitu baochi yanjiu, 2023
[Objective] In order to provide a reference for the thorough control of watershed soil erosion and the improvement of ecological environment quality in the Loess Plateau region, the effects of ecological engineering measures and natural factors on soil ...
ZHANG Yan   +5 more
doaj  

Coordinated Architectural and Chemical Reinforcement in the Crushing Mandible of a Soldier Termite

open access: yesAdvanced Functional Materials, EarlyView.
The crushing mandible of a soldier termite withstands substantial biting loads despite lacking mineral. Its cuticle is partitioned: convex teeth pair hardness and zinc enrichment with aligned chitin fibers for contact durability, while stiffer concave regions between teeth carry bending loads.
Andrew Tran Nguyen   +16 more
wiley   +1 more source

Southwest Asia, India, Pakistan, and Northeast Africa [cartographic material] /

open access: yes, 1952
Map of Southwest Asia, India, Pakistan and Northeast Africa showing international and provincial boundaries, transportation, pipelines, ground and water features and populated places.
National Geographic Society (U.S.). Cartographic Division.
core  

Evolution and Driving Factors of Ecosystem Service Value in the Henan Section of the Yellow River Basin at Different Grid Scales

open access: yesEcologies
Advancing ecological civilization in the Yellow River Basin requires a nuanced understanding of the spatiotemporal evolution of ecosystem service value (ESV) and its underlying drivers, which are fundamental to regional sustainable development.
Zihan Wang   +3 more
doaj   +1 more source

Advancing SafeWax, A Bio‐Inspired Superhydrophobic Coating, Toward Sustainable and Climate‐Resilient Crop Protection

open access: yesAdvanced Functional Materials, EarlyView.
This study advances SafeWax, a bio‐inspired, fatty‐acids‐based superhydrophobic coating, by identifying an agriculturally compliant solvent and revealing how solvent‐controlled Fatty acid crystallization governs the coating's microscopic structure and performance.
Niv Ben‐Arie   +13 more
wiley   +1 more source

The United States and adjoining portions of Canada and Mexico [cartographic material] /

open access: yes, 1933
Map of United States, southern part of Canada and northern part of Mexico. Relief shown by hachures.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-db110; DB Copy MS 365/93/44.The National geographic ...
National Geographic Society (U.S.). Cartographic Section.
core  

Vegetation Changes and Its Driving Factors in the Three-River Headwaters Region from 1990 to 2022

open access: yesRemote Sensing
Changes in vegetation coverage reflect the status and dynamic processes of ecosystems and serve as a crucial foundation for regional ecological protection.
Chen Wang   +4 more
doaj   +1 more source

Charge‐Polarized Ni─S4 Single‐Atom Sites Drive Selective Photoreforming of Poly(lactic acid) to Lactate and Hydrogen

open access: yesAdvanced Functional Materials, EarlyView.
Atomically dispersed Ni–S4 sites on CdS nanorods induce interfacial charge polarization, directing photogenerated electrons to H2 evolution and holes to selective ester‐bond cleavage of poly(lactic acid). Without sacrificial reagents, this charge‐coupled system produces lactate while suppressing overoxidation, achieving an H2 evolution rate of 41.74 ...
Yu Yao   +8 more
wiley   +1 more source

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