Results 101 to 110 of about 43,907 (278)

Capturing Complex Rate‐Dependent Behaviors of Saturated Clays: A Fractional Consistency Kinematic Hardening Viscoplastic Approach

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Saturated high plasticity clays show complex nonlinear, rate‐dependent, and hysteresis behaviors under non‐monotonic stress paths, requiring advanced mathematical constitutive equations for accurate description. Taking into account the inherent advantages of kinematic hardening mechanisms in simulating complex stress histories, this paper ...
Wei Cheng, Zhen‐Yu Yin
wiley   +1 more source

THERMODINAMIC PARAMETERS ON THE SORPTION OF PHOSPHATE IONS BY MONTMORILLONITE

Jurnal Sains Dasar, 2016
The sorption of phosphate by montmorillonite at 10, 30, and 50 oC were investigated aiming to mainly determine thermodynamic parameters for the formation of surface complexes in the adsorption of phosphate ions by montmorillonite.
Ikhsan Jaslin, Wijayanti Endang, Sunarto Sunarto   +2 more
doaj  

Montmorillonit K-10 yang Dimodifikasi Ni2+: Sifat Struktur dan Aktivitas Katalitik

Jurnal Fisika Unand
Fokus studi ini adalah mensintesis material berbasis montmorillonit K-10 yang dimodifikasi dengan spesies Ni2+ melalui metoda hidrotermal. Pengaruh aktivasi termal terhadap support montmorillonit K-10 pada proses pertukaran kation untuk menghasilkan katalis heterogen dikarakterisasi dengan x-raydiffraction (XRD) dan x-ray fluoressence (XRF).
Admi Admi, Dewi Khofifatul Khoiriah, Syukri Syukri   +2 more
openaire   +1 more source

Molecular Insights Into the Water Freezing on Kaolinite Surfaces: The Key Role of Surface Properties

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Unfrozen water content is a key factor governing the physical properties of frozen soils, and variations in mineral surface properties play a critical role in determining this content. However, the fundamental physical mechanisms of how different mineral surfaces affect soil water freezing remain poorly understood.
Yijie Wang, Zhen‐Yu Yin, Pierre‐Yves Hicher   +2 more
wiley   +1 more source

Impact of Al3+ Concentration on Montmorillonite Sedimentation: Insights Into Particle Size Behavior

ChemistryOpen, EarlyView.
The current research essentially focuses on the coagulation and sedimentation characteristics of particles with two distinct particle‐size compositions. The DLVO theory confirms that under the influence of aluminum ions, the coarse and fine particle sampleS of montmorillonite essentially possess the effect of eliminating or weakening the “barrier ...
Hanyu Zhao, Lijun Liu, Xue Yuan, Qingtao Pang, Lei Yao, Bo Gao, Yihong Li, Liang Han, Yizhe Yang, Wei Yu, Zhen Li, Yuexian Yu, Jinzhou Qu   +12 more
wiley   +1 more source

Novel 2,3-unsaturated O-glycosides containing an alkynyl function in their aglycones

Results in Chemistry
This paper describes the synthesis of seven D-glucosides, 3a-g, and six D-galactosides, 4a-f, all containing an alkynyl function in their aglycones. The reaction was performed using dichloromethane as solvent in the presence of Montmorillonite K-10.
Adriana C.N. de Melo, Natália M. Bezerra, Rajendra M. Srivastava, Carlos Alberto de Simone   +3 more
doaj   +1 more source

Removal of As Using Chitosan–Montmorillonite Composite: Sorptive Equilibrium and Kinetics

Adsorption Science & Technology, 2013
In this study, the sorptive removal of As 3+ with promising sorption efficiency up to a very low concentration has been investigated using chitosan–montmorillonite (MMT) composites (in the form of powder and beads).
Ansar Anjum, Chand K. Seth, Monika Datta
doaj   +1 more source

Biodegradable Biocomposites of Isosorbide‐Plasticized Corn Starch Reinforced With Green Graphene: Enhanced Properties for Sustainable Applications

Polymer Composites, EarlyView.
Different properties of biocomposites based on TPS with isosorbide as a plasticizer and green graphene filler. ABSTRACT New biocomposites of corn starch plasticized with isosorbide and filled with two types of “green” graphene with different oxygen content, 1% (G99) and 8% (G92), were processed by melt blending.
Danny Moncada, Rebeca Bouza, Zoia Haholkina, Natalia Pettinelli, Rodríguez‐Llamazares Saddys, Maite Rico   +5 more
wiley   +1 more source

Synthesis and evaluation of cytotoxic activity derived 2,3-diyne-1,4-naphthoquinones

Orbital: The Electronic Journal of Chemistry, 2012
In the present study ten 2,3-diyne-1,4-naphthoquinone derivatives (3a-j) were synthesized by Sonogashira coupling reaction between the 2,3-dibromo-1,4-naphthoquinone (2) and several functionalized terminal alkynes using a catalytic complex of palladium ...
Mauro G. da Silva, Tania M. S. Silva, Celso de A. Camara, Anderson C. S. Feitosa, Claudia do Ó Pessoa   +4 more
doaj   +1 more source

Synergistic Effect of Silanized Ramie Fiber and Montmorillonite Clay on the Mechanical, Thermal, and Dynamic‐Mechanical Properties of Polyester Composites

Polymer Composites, EarlyView.
Multiscale composite reinforced with silane‐modified ramie fiber and clay. ABSTRACT Multiscale polymer composites combining natural fibers and layered silicates can balance stiffness, toughness, and thermal stability when interfacial interactions are properly engineered.
Daniel Rossi Klein, Maria Eduarda Escher Maletz, Matheus Vinícius Gregory Zimmermann, Ademir José Zattera, Daiane Romanzini   +4 more
wiley   +1 more source