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Quantum chemical studies on tautomerism and basicity behavior of some 1,2,4-triazole derivatives
1,2,4-Triazole proton affinity tautomerism acidity constant nucleophilicity
2010/12/20
The acidity constants, relative stabilities, and tautomeric equilibrium constants of some 1,2,4-triazole derivatives were determined using the density functional theory (DFT) with the B3LYP method and...
Chemical composition and antimicrobial activity of the essential oils of mosses (Tortula muralis Hedw., Homalothecium lutescens (Hedw.) H. Rob., Hypnum cupressiforme Hedw., and Pohlia nutans (Hedw.) Lindb.) from Turkey
Tortula muralis Homalothecium lutescens Hypnum cupressiforme
2010/12/3
The essential oils of mosses [Tortula muralis Hedw. (Pottiaceae), Homalothecium lutescens (Hedw.) H. Rob. (Brachytheciaceae), Hypnum cupressiforme Hedw. (Hypnaceae), and Pohlia nutans (Hedw.) Lindb. (...
Chemical composition and antimicrobial activity of the essential oils of Mosses (Tortula muralis Hedw., Homalothecium lutescens (Hedw.) H. Rob., Hypnum cupressiforme Hedw., Pohlia nutans (Hedw.) Lindb.) from Turkey
Tortula muralis Homalothecium lutescens Hypnum cupressiforme
2010/10/19
The essential oils of mosses [Tortula muralis Hedw. (Pottiaceae), Homalothecium lutescens (Hedw.) H. Rob. (Brachytheciaceae), Hypnum cupressiforme Hedw. (Hypnaceae), and Pohlia nutans (Hedw.) Lindb. (...
In the course of their work, chemists sometimes judge particular chemical processes to be possible or impossible. In this note I examine the semantics of the notion of possibility implicit in these ju...
Three Concepts of Chemical Closure and their Epistemological Significance
substrate theory dihydrogen molecule concentration robustness affordance
2011/9/7
Philosophers have long debated ‘substrate’ and ‘bundle’ theories as to how properties hold together in objects ― but have neglected to consider that every chemical entity is defined by closure of rela...
Chemical-State-Selective Mapping at Nanometer Scale Using Synchrotron Radiation and Photoelectron Emission Microscopy
Chemical-State-Selective Mapping Nanometer Scale Synchrotron Radiation Photoelectron Emission Microscopy
2010/9/15
For surface analyses of semiconductor devices and various functional materials, it has become indispensable to analyze valence states at nanometer scale due to the rapid developments of nanotechnology...
A general parallelization approach to improve computation efficiency in a global chemical transport model (GEOS-Chem)
MPI OpenMP parallelization GEOS-Chem modeling performance
2017/8/9
Despite increasing processing power of systems, sequential programs have limitations to achieve corresponding performance gains. Parallelization of sequential programs can exploit the computation pote...
Chemical Effects of CeLγ4 Emission Spectra for Ce Compounds
Chemical Effects CeLγ4 Emission Spectra Ce Compounds
2010/9/15
High-resolution CeLγ4 emission spectra of CeF3, Ce2S3, CeF4, and CeO2 have been measured using a multicrystal, multidetector spectrometer. The spectra exhibited substantial differences depending on th...
Design of Photo-Controlled Chemical Oscillators
Autocatalytic reaction Chemical oscillations Nonlinear feedback Photochemistry
2009/12/7
This article reviewed recent progresses in the design of a new class of chemical oscillators and developed a generic model that could qualitatively reproduce those photochemical oscillations seen in e...
Chemical constituents and mushroom tyrosinase inhibition activity of Chloroxylon swietenia leaves
Chloroxylon swietenia coumarins fatty alcohol flavonoid glycoside tyrosinase inhibition activity
2010/4/8
From the leaves of Chloroxylon swietenia DC., 5 known secondary metabolites, namely 6, 8-diprenylumbelliferone (1), bergaptan (2), isopimpinellin (3), tritriacontanol (4), and isoquercetrin (5), were ...
《Lange's Chemistry Handbook》Section 8 eletrolytes electromotive force and and Chemical Equilibrium
Lange's Chemistry Handbook 兰氏化学手册 N.A.兰格 J.A.迪安
2009/3/5
《Lange's Chemistry Handbook》Section 8 eletrolytes electromotive force and and Chemical Equilibrium。
Studies on the Chemical Constituents of Thymus serpyllum
Thymus serpyllum chemical constituents isolation structures antifungal
2010/4/16
Phytochemical investigations on the methanolic extract of Thymus serpyllum resulted in the isolation of 2 new compounds, 3-ketopentatriacontanoic acid (1) and 27-ketotriacontanol (2). The extract also...
Chemical condition for the appearance of a negative Ce anomaly in stream waters and groundwaters
Ce anomaly iron manganese Rare Earth Element Redox processes dissolved organic carbon
2017/8/10
Nine publications showing REE data in groundwaters and river water were examined to understand the general condition of terrestrial water where a negative Ce anomaly develops. It was found that the ne...
Reconstructing physico-chemical parameters of hydrothermal mineralization of copper at the Malanjkhand deposit, India, from mineral chemistry of biotite, chlorite and epidote
hydrothermal temperature fugacity copper complexing
2017/8/10
Mineral chemistry of biotite, chlorite and epidote associated with the granitoid ore body of the Malanjkhand copper-molybdenum deposit have been studied to constrain temperature, oxidation and sulfida...
Exogenous chemical substances in bird perception: a review
anting food navigation olfactory
2015/3/17
The perception of exogenous chemical substances, olfactory navigation and the use of the olfactory
sense by birds to search for food are reviewed. Many results suggest that the olfactory sense is on...