Results 81 to 90 of about 2,481,910 (343)

Design and Synthesis of Lactose‐Derived Ligands and Their Application in Asymmetric Friedel–Crafts Alkylation

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
This work describes the synthesis of lactose‐ and glucose‐derived chiral ligands and their application in the catalytic enantioselective Friedel–Crafts alkylation of indole with a series of trans‐β‐nitrostyrenes. The optimal ligand was an acetate protected, lactose‐derived pyridyl imine and its zinc complex afforded ees up to 93% and yields up to 93 ...
Sandra Bulawa   +2 more
wiley   +1 more source

Stability of 3D tunnel face under steady unsaturated seepage coupled multi-layer soil suction head distributions

open access: yesAlexandria Engineering Journal
This paper proposes a new discrete approach for analyzing tunnel face stability in stratified soils under unsaturated seepage conditions. Traditional methods have primarily focused on homogeneous soils, neglecting the spatial variability of unsaturated ...
Huanjiang Wu, Hong Liao, Chaoguang Wu
doaj   +1 more source

Thermal Conductivity Model Analysis of Unsaturated Ice-Containing Soil

open access: yesGeofluids, 2022
In cold locales, the thermal conductivity of soil porous media varies according to their composition and the phase state of the substance contained within the pore space.
Qiang Han, Zhiguo Wang, Rui Qin
doaj   +1 more source

Modelling of collapse settlement by effective stress and shear strength interaction for granite residual soil / Ismacahyadi Bagus Mohamed Jais [PDF]

open access: yes, 2014
Over the years, consolidation settlement has always been associated with effective stress increase. However, in unsaturated soils, volume change behaviour of soils due to wetting is always complex due to changes of the soil when it is inundated. The main
Mohamed Jais, Ismacahyadi Bagus
core  

Sustainable Microwave‐Enhanced Synthesis of 2‐Substituted Benzofurans From o‐Alkynylanisoles in Acidic Deep Eutectic Solvents

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
A microwave‐enhanced sustainable and versatile approach to substituted benzofurans from 2‐alkynylanisoles enabled by an active Brønsted acidic deep eutectic solvent. The research on alternative media for organic transformations remains a highly demanding topic.
Alessandra Gritti   +9 more
wiley   +1 more source

Fast Determination of Soil Behavior in the Capillary Zone Using Simple Laboratory Tests [PDF]

open access: yes, 2012
INE/AUTC 13 ...
Li, Lin, Lytton, Robert L., Xhang, Xiong
core  

Noni (Morinda citrifolia) Seed Oil: Phytochemical Composition, Bioactivity, and Emerging Applications in Food and Health

open access: yesFood Chemistry International, EarlyView.
Noni seed oil from Morinda citrifolia, highlighting its bioactive composition, conventional and green extraction methods, and major stability challenges. Encapsulation strategies improve oxidative stability and bioavailability, along with potential applications in functional foods and cosmetics, and key barriers to large‐scale commercialization ...
Sumidha Palanisamy   +4 more
wiley   +1 more source

An estimate of energy dissipation due to soil-moisture hysteresis [PDF]

open access: yes, 2012
Processes of infiltration, transport and outflow in unsaturated soil necessarily involve the dissipation of energy through various processes. Accounting for these energetic processes can contribute to modelling hydrological and ecological systems.
McNamara, H.
core   +1 more source

Improving predictive power of physically based rainfall-induced shallow landslide models: a probabilistic approach

open access: yes, 2014
Distributed models to forecast the spatial and temporal occurrence of rainfall-induced shallow landslides are based on deterministic laws. These models extend spatially the static stability models adopted in geotechnical engineering, and adopt an ...
Alvioli, M.   +5 more
core   +2 more sources

Modeling of transpiration reduction in van Genuchten-Mualem type soils [PDF]

open access: yes, 2009
We derive an analytic expression for the matric flux potential (M) for van Genuchten-Mualem (VGM) type soils which can also be written in terms of a converging infinite series.
Lier, Q.D., van   +2 more
core   +2 more sources

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