Mostrando ítems 1-10 de 420
- . . .
R-factorizable paratopological groups
For i = 1, 2, 3, 3.5, we define the class of R<sub>i</sub>-factorizable paratopological groups G by the condition that every continuous real-valued function on G can be factorized through a continuous homomorphism p : G → ...
Ceramic pigments with sphene structure obtained by both spray- and freeze-drying techniques
The present study is focused on the procedure of spray- and freeze-drying techniques for the preparation of Cr-doped sphene pigments (CaSn0.98Cr0.02 SiO5, CaTi0.98Cr0.02SiO5) from an aqueous solution of precursor salts, ...
Countercurrent chromatography: People and applications
The scientific literature was scanned for the published research articles dealing with countercurrent chromatography (CCC) over the time period 1980-May 2008. The search returned 1638 articles that were analyzed focussing ...
Differential dorsolateral prefrontal cortex activation during a verbal n-back task according to sensory modality
Functional neuroimaging studies carried out on healthy volunteers while performing different n-back tasks have shown a common pattern of bilateral frontoparietal activation, especially of the dorsolateral prefrontal cortex ...
(η6-Arene)ruthenium(N-heterocyclic carbene) Complexes for the Chelation-Assisted Arylation and Deuteration of Arylpyridines: Catalytic Studies and Mechanistic Insights
A series of (η6-arene)ruthenium complexes have been tested in the arylation of arylpyridines. One (η6-p-cymene)ruthenium(N-heterocyclic carbene) complex (labelled as 1 in the text) was found to be the most effective, being ...
From Salts to Ionic Liquids by Systematic Structural Modifications: A Rational Approach Towards the Efficient Modular Synthesis of Enantiopure Imidazolium Salts
This paper reports a simple and robust modular synthetic strategy that leads to a large variety of configurationally and structurally diverse imidazole-based chiral ionic liquids (CILs) by lipase-catalyzed resolution. The ...
The effects of postharvest carbon dioxide and a cold storage treatment on Tuta absoluta mortality and tomato fruit quality
Tuta absoluta is an invasive pest species that affects tomatoes and other solanaceous crops and is found in Europe and other Mediterranean areas. Hitherto, fumigation with methyl bromide is the only measure used to control ...
Modulation of the antioxidant system in citrus under waterlogging and subsequent drainage
Soil flooding induces an impairment of the photosynthetic system that often leads to an accumulation of reactive oxygen species (ROS) in plant tissues. Moreover, flooding release by drainage can cause a sudden oxygen burst ...
In situ synthesis of orange rutile ceramic pigments by non-conventional methods
Different precursor-mixtures of orange Cr,Sb-TiO<sub>2</sub> ceramic pigment have been obtained by non-conventional methods (heterogeneous ammonia coprecipitation, urea homogeneous coprecipitation, PECHINI polyester method ...
Semi-analytical integration algorithms based on the use of several kinds of anomalies as temporal variable
One of the main problems in celestial mechanics is the management of long developments in Fourier or Poisson series used to describe the perturbed motion in the planetary system. In this work we shall develop a software ...