Results 81 to 90 of about 38,272 (222)

Rapid Method for the Determination of 5-Hydroxymethylfurfural and Levulinic Acid Using a Double-Wavelength UV Spectroscopy

open access: yesThe Scientific World Journal, 2013
This study reports on a rapid method for the determination of levulinic acid (LA) and 5-hydroxymethylfurfural (HMF) in acid hydrolyze system of glucose based on UV spectroscopy. It was found that HMF and LA have a maximum absorption at the wavelengths of
Junhua Zhang   +3 more
doaj   +1 more source

Manned Mars mission health maintenance facility [PDF]

open access: yes
The Health Maintenance Facility (HMF) requirements which enable/enhance manned Mars missions (MMMs) are addressed. It does not attempt to resolve any issues that may affect the feasibility of any given element in the HMF.
Degioanni, Joseph C.
core   +1 more source

Magnetic and electric properties of double-perovskites and estimation of their Curie temperatures by ab initio calculations

open access: yes, 2008
First principles electronic structure calculations have been carried out on ordered double perovskites Sr_2B'B"O_6 (for B' = Cr or Fe and B" 4d and 5d transition metal elements) with increasing number of valence electrons at the B-sites, and on ...
A. R. Mackintosh   +8 more
core   +1 more source

Recent Advances in Conjugated Microporous Polymers for Photocatalysis: Mechanism, Synthesis and Applications

open access: yesExploration, EarlyView.
Conjugated microporous polymers (CMPs) have attracted more and more attention as new photocatalysts due to their unique advantages such as high performance, long stability and strong light absorption. This review summarizes the application of CMPs as a photocatalyst in recent years and introduces the catalytic mechanism.
Dun Zhou   +5 more
wiley   +1 more source

Process Analysis of Furan Dicarboxylic Acid Production from Lignocellulose Biomass

open access: yesChemical Engineering Transactions
Furan dicarboxylic acid (FDCA) has gained significant attention due to its use as a precursor in the production of polyethylene furanoate (PEF). PEF is a bio-based plastic that can be used as a sustainable alternative in the production of plastics to ...
Dang Saebea   +3 more
doaj   +1 more source

Entropy production in systems with long range interactions

open access: yes, 2017
On a fine grained scale the Gibbs entropy of an isolated system remains constant throughout its dynamical evolution. This is a consequence of Liouville's theorem for Hamiltonian systems and appears to contradict the second law of thermodynamics.
Levin, Yan, Pakter, Renato
core   +1 more source

Application, Challenges, and Prospects of Non‐Thermal Processing Technologies for Seaweed Protein Extraction—A Review

open access: yesFood Chemistry International, EarlyView.
This review highlights non‐thermal extraction technologies for seaweed proteins, emphasizing their mechanisms, impacts on protein structure and functionality, and sustainability potential. Key limitations related to species dependence, extract complexity, and scale‐up are discussed to guide future industrial and biorefinery applications.
Rahat Mahmud   +3 more
wiley   +1 more source

5-Hydroxymethylfurfural (HMF) levels in honey and other food products: effects on bees and human health

open access: yesChemistry Central Journal, 2018
An organic compound known as 5-hydroxymethylfurfural (HMF) is formed from reducing sugars in honey and various processed foods in acidic environments when they are heated through the Maillard reaction. In addition to processing, storage conditions affect
Ummay Mahfuza Shapla   +4 more
doaj   +1 more source

Hamiltonian dynamics reveals the existence of quasi-stationary states for long-range systems in contact with a reservoir

open access: yes, 2006
We introduce a Hamiltonian dynamics for the description of long-range interacting systems in contact with a thermal bath (i.e., in the canonical ensemble). The dynamics confirms statistical mechanics equilibrium predictions for the Hamiltonian Mean Field
A. Pluchino   +5 more
core   +1 more source

Corticosterone and Mitochondrial Efficiency Are Associated With Changes in DNA Oxidative Damage During an Acute Stress Response in Leach's Storm‐Petrels (Hydrobates leucorhous)

open access: yesJournal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
ABSTRACT The ability of organisms to effectively respond to challenges is critical for survival. We investigated how an acute stressor affected corticosterone, mitochondrial function, and DNA oxidative damage in a wild population of Leach's storm‐petrels (Hydrobates leucorhous).
Kayla E. Lichtner   +10 more
wiley   +1 more source

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