Results 71 to 80 of about 146,750 (290)

Riverine transfer of heavy metals from Patagonia to the southwestern Atlantic Ocean [PDF]

open access: yes, 2002
The occurrence and geochemical behaviour of Fe, Mn, Pb, Cu, Ni, Cr, Zn and Co are studied in riverine detrital materials transported by Patagonian rivers.
Depetris, Pedro J.   +4 more
core   +1 more source

Bidirectionally Thermochromic Nanocolloid System for on‐Demand Optical Switching and Agricultural Energy Management

open access: yesAdvanced Science, EarlyView.
A bidirectionally thermochromic nanocolloid system is developed for facility agriculture. The bidirectional and wide‐temperature response dynamically modulates light radiation, stabilizing the indoor climate, improving supplemental lighting efficiency, and accelerating plant photosynthesis.
Qinbo Jiang, Jiayi Li, Hui Zhang
wiley   +1 more source

The effect of natural weathering on untreated wood surface

open access: yesMaderas: Ciencia y Tecnología, 2017
As a result of contemporary ecological and sustainable movements, a number of constructions from wood, as the only renewable building material, is still increasing. In accordance with these trends, wood elements are often left untreated.
Eliška Oberhofnerová   +2 more
doaj  

Differential etching after lithic heat treatment: First results of an experimental study

open access: yesJournal of Lithic Studies, 2018
The practice of lithic heat treatment creates a combination of initial dull flake scars and subsequent smooth flake scars when the implement is finished after heating.
Linda Kiers
doaj   +1 more source

Murder Nature

open access: yes, 2021
This paper examines the effect of weather shocks on violent crime using disaggregated data from Brazilian municipalities over the period 1991-2015. I document that adverse weather shocks in the form of droughts lead to a significant increase in violent crime, with the effect appearing to persist beyond the growing season and over the medium run.
openaire   +2 more sources

Contamination of surface waters by mining wastes in the Milluni Valley (Cordillera Real, Bolivia): Mineralogical and hydrological influences [PDF]

open access: yes, 2008
This study is one of very few dealing with mining waste contamination in high altitude, tropical-latitude areas exploited during the last century. Geochemical, mineralogical and hydrological characterizations of potentially harmful elements (PHEs) in ...
Isaure, Marie-Pierre   +3 more
core   +3 more sources

Encapsulating Textiles with Dynamic Covalent Networks for Sustainable and Efficient Oil Spill Cleanup

open access: yesAdvanced Science, EarlyView.
By encapsulating industrially relevant fabrics with dynamic imine networks, we show that the resulting composites exhibit exceptional oil absorbtion capability and chemical recyclability. It is poised for sustainable oil spill cleanup. ABSTRACT The development of high‐performance sorbents for oil spill remediation is highly desirable, which now calls ...
Changyi You   +9 more
wiley   +1 more source

Study of Natural and Accelerated Weathering on Mechanical Properties of Antioxidants Modified Low Density Polyethylene Films for Greenhouse

open access: yesInternational Journal of Polymer Science, 2014
Natural and accelerated weatherings were studied to inspect the effect of antioxidants to protect low-density polyethylene (LDPE) films for commercial application as greenhouse covering materials in Saudi Arabia.
Othman Al Othman   +2 more
doaj   +1 more source

Natural weathering on coated tropical woods

open access: yesIOP Conference Series: Materials Science and Engineering, 2020
Abstract Teak and pine are common wood species in Indonesia. The purpose of this research is to evaluate the performance of the coating layer in these wood species after six months natural weathering. The durability on natural weathering is evaluated due to microbial disfigurement (fungi or algae), checking and cracking, whereas ...
A T Lestari, W Darmawan, D Nandika
openaire   +1 more source

Machine Learning Driven Window Blinds Inspired Porous Carbon‐Based Flake for Ultra‐Broadband Electromagnetic Wave Absorption

open access: yesAdvanced Science, EarlyView.
Inspired by the regulation mechanism of window blinds, this study designs an electromagnetic wave‐absorbing metamaterial. By introducing the magneto‐electric coupling concept and integrating it with an artificial intelligence‐based data‐driven collaborative optimization strategy, the material optimizes impedance matching performance and enhances loss ...
Zhe Wang   +9 more
wiley   +1 more source

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