Results 41 to 50 of about 2,123,596 (289)

Analysis of a reaction-diffusion system of ƛ -w type [PDF]

, 2003
The author studies two coupled reaction-diffusion equations of 'ƛ - w' type, on an open, bounded, convex domain Ω C R(^d) (d ≤ 3), with a boundary of class C(^2), and homogeneous Neumann boundary conditions.
Garvie, Marcus Roland
core  

Determining the reaction enthalpy in pyrolysis and combustion at realistic process conditions [PDF]

Understanding and optimising processes during combustion or converting biomass to carbon materials requires information about reaction enthalpies, ideally determined experimentally at industrially relevant conditions.

core   +3 more sources

Gallium Microalloying in Bi–Sn Solders: Interfacial Phase Formation, Wettability, and Long‐Term Shear Reliability Under Isothermal Aging

Advanced Engineering Materials, EarlyView.
Gallium microalloying redirects interfacial reactions in low‐temperature Bi–Sn solders from Cu–Sn toward Cu–Ga intermetallic formation. The resulting Cu–Ga layer suppresses intermetallic growth during thermal aging, alters fracture pathways, and improves interfacial stability.
Iva Králová, Markéta Klimtová, Mohd Faizul Mohd Sabri, Yew Hoong Wong, Petr Veselý, Martin Plaček, Karel Dušek   +6 more
wiley   +1 more source

Determination and Validation of Standard Enthalpies of Formation and Sublimation of Potassium Salts Using Solution Calorimetry and Quantum‐Chemical Calculations

ChemistryOpen
This work aims to develop an approach for the systematic determination of the formation and sublimation enthalpies of inorganic compounds using the examples of potassium bicarbonate, potassium carbonate, and potassium formate.
Zohreh Amanollahi, Dzmitry H. Zaitsau, Karsten Müller, Olga S. Bokareva, Riko Siewert   +4 more
doaj   +1 more source

Group Contribution Revisited: The Enthalpy of Formation of Organic Compounds with “Chemical Accuracy” Part V

Applied Sciences
Group Contribution (GC) methods to predict thermochemical properties are eminently important in chemical process design. Following our earlier work in which a Group Contribution (GC) model was presented to account for the gas-phase heat of formation of ...
Robert J. Meier, Paul R. Rablen
doaj   +1 more source

Simultaneous Characterization of Reaction Kinetics and Enthalpy by Calorimetry Based on Spatially Resolved Temperature Profile in Flow Reactors

, 2023
Characterizing the Gibbs energy of activation and the enthalpy of reactions typically requires repeated sampling. In this study, a new calorimetric reaction-characterization technique was developed for thermokinetic analysis in a flow reactor. The method
Jun-ichi Ogawa (555662), Hidenosuke Itoh (14601264), Yuma Otake (8997416), Yusuke Imamura (145198)   +3 more
core   +1 more source

High‐Entropy Alloy Interlayers Toward Advanced Joining for High‐Performance Structural Applications: Current Progress and Emerging Challenges

Advanced Engineering Materials, EarlyView.
HEA interlayers offer a versatile route for joining high‐performance structural materials. Their compositional and structural design regulates interfacial reactions, suppresses brittle IMCs, and improves metallurgical bonding. Sandwich interlayers further integrate defect healing with precipitation strengthening, enabling improved strength–ductility ...
Lin Yuan, Jiafen Song, Jinglong Li, Jiangtao Xiong, Tao Yang   +4 more
wiley   +1 more source

The Enthalpy of Formation of Acetylenes and Aromatic Nitro Compounds for a Group Contribution Method with “Chemical Accuracy”

AppliedChem
In this paper we provide the Group Contribution parameters for acetylenes and aromatic nitro compounds fitting with a recently developed Group Contribution method with chemical accuracy (1 kcal/mol) for the heat of formation of organics. These additional
Robert J. Meier, Paul R. Rablen
doaj   +1 more source

Ab initio quantification of the oxygen-hemoglobin dissociation curve

Biophysical Reports, 2023
Uptake of oxygen by hemoglobin (Hb), described by the oxygen-Hb dissociation curve, is obviously important for the existence of all vertebrates. Its sigmoidal curve shape indicates that oxygen binds more tightly if sites already are occupied, commonly ...
Dag Chun Standnes
doaj   +1 more source

Effect of Cu and CuP Additions on the Microstructure and Nanoindentation‐Based Fracture Behavior of CoNiAlSi Ferromagnetic Shape Memory Alloys

Advanced Engineering Materials, EarlyView.
Cu and combined Cu–P microalloying refine the microstructure and enhance the nanoindentation‐derived fracture resistance of CoNiAlSi ferromagnetic shape memory alloys without suppressing the martensitic transformation. Comparative SEM, DSC, and nanoindentation results reveal that the CuP‐containing alloy provides the most balanced response, achieving ...
Mehmet Demir
wiley   +1 more source