Results 61 to 70 of about 194,945 (299)

Establishing a Model Precursor System: Over a Decade of Research on Carbon Dots from the Citric Acid‐Urea System

Advanced Functional Materials, EarlyView.
The citric acid/urea (CA‐Urea) precursor system offers a versatile, scalable route to carbon dots with tunable luminescence and multifunctionality. Mechanistic insights into precursor chemistry and reaction parameters have enabled doping, surface modification, and hybridization strategies, yielding CDs for luminescent devices, sensing, catalysis ...
Yupeng Liu, Zhiqi Cai, Xiangxin Sun, Hanyi Zhang, Yiming Hao, Jun Wu, Zekun Yan, Xue Wu, Yiqi Liang, Liming Wang, Songnan Qu   +10 more
wiley   +1 more source

A Simple Model for Estimating the Hydraulic Conductivity of Unsaturated Soil

Applied Sciences
Describing the hydraulic conductivity of unsaturated soil is very important in predicting water transport. Most current models have complex forms and generally need to be calibrated by the measured unsaturated hydraulic conductivity curve. A simple model,
Ziran Zhang, Maosheng Zhang
doaj   +1 more source

Soil-Water Characteristic Curve Model Based on Particle Size Distribution and Pellicular Water [PDF]

长江科学院院报
Traditional models for predicting soil-water characteristic curve (SWCC) based on particle size distribution curve require segmentation of the curve when calculating water content and often neglect the pellicular water (also known as film water) content ...
ZHU Shi-wang, LI Shuang-yang, JIANG Qi, ZHAO Jian-yuan, ZHOU Shang-qi, LIU Hui-ying
doaj   +1 more source

Prediction of Coefficient of Permeability of Unsaturated Soil

Journal of Engineering, 2023
A simple technique is proposed in this paper for estimating the coefficient of permeability of an unsaturated soil based on physical properties of soils that include grain size analysis, degree of saturation or water content, and porosity of the soil ...
Mohammed Y. Fattah, Mahmood D. Ahmed, Nawar A. Ali   +2 more
doaj   +1 more source

Water Retention, Bulk Density, Particle Size, and Thermal and Hydraulic Conductivity of Arable Soils in Interior Alaska [PDF]

, 1990
The relative proportion of liquid, gas, and solid as constituents of soil depends on factors such as climate, biological activity, and management practices.
Sharratt, Brenton S.
core  

Silicified Wood‐Inspired, High‐Strength Fire‐Resistant Chitin‐Based Aerogels for Sustainable High‐Temperature Thermal Insulation

Advanced Functional Materials, EarlyView.
Inspired by natural silicified wood, a biomimetic mineralized chitin‐derived aerogel is constructed. It can withstand 81 000 times its own weight, and its backside temperature is 130.4°C after exposure to ∼1300°C butane flame for 600 s, exhibiting high‐strength, fire‐resistance, and super thermal‐insulation properties.
Kai Xu, Qihang Lv, Lubin Liu, Zhezhe Zhou, Chentao Yan, Ao Qin, Jianting Ma, Shuhui Liang, Yue Xu, Min Hong, Bin Li, Pingan Song   +11 more
wiley   +1 more source

Evolution of fissures and bivariate-bimodal soil-water characteristic curves of expansive soil under drying-wetting cycles

Yantu gongcheng xuebao, 2021
Periodical evaporation and rainfall cause the development of fractured soil, and the fracture has a strong influence on the hydraulic and strength characteristics of the soil.To study the crack development law and soil-water characteristics of expansive ...
WANG Shi-ji 1, 2, WANG Xiao-qi 1, LI Da 1, LI Xian 1, LIANG Guang-chuan 1, MUHAMMAD Qayyum Hamka 1
doaj   +1 more source

Spatial heterogeneity and irreversible vegetation change in semi-arid grazing systems [PDF]

, 2002
Recent theoretical studies have shown that spatial redistribution of surface water may explain the occurrence of patterns of alternating vegetated and degraded patches in semiarid grasslands.
Andel, J., van, Fryxell, J.M., Hearne, J., Klausmeier, C.A., Koppel, J., van de, Kumar, L., Langevelde, F., van, Prins, H.H.T., Ridder, N., de, Rietkerk, M., Skidmore, A.K., Stroosnijder, L.   +11 more
core   +2 more sources

Melt Electrowriting High Resolution Poly(ethylene‐co‐vinyl acetate) Scaffolds for Soft Tissue Engineering

Advanced Healthcare Materials, EarlyView.
This work pioneers melt electrowriting (MEW) of polyethylene vinyl acetate (PEVA) to fabricate ultra‐compliant, high‐resolution scaffolds. By integrating microscale precision with soft tissue‐like biomechanics, PEVA overcomes stiffness‐driven limitations of conventional MEW polymers, establishing a mechanically biomimetic platform for soft tissue ...
Finn Snow, Darcy De Rauch, Lilith Mabel Caballero Aguilar, Darcy Millett, Jasley Wilding McBride, David R Nisbet, Magdalena Kita, Elena Pirogova, Robert Michail Ivan Kapsa, Anita Quigley   +9 more
wiley   +1 more source

Seasonal changes in pore water pressure in a grass covered cut slope in London clay

, 2006
In temperate European climates, the season of peak water demand by vegetation (summer) is out of phase with the season of greatest rainfall (winter). This results in seasonal fluctuations in soil water content and, in clay soils, associated problems of ...
Clarke, D., Powrie, W., Smethurst, J.A.
core   +1 more source