Search results for "Roca"

Evolution of the optimal catalytic systems for the oxidative dehydrogenation of ethane: The role of adsorption in the catalytic performance

2022

Three samples that correspond to the evolution of optimal catalytic systems for the oxidative dehydrogenation of ethane have been synthesized and compared in terms of catalytic behavior and adsorption properties: (i) vanadium oxide supported on alumina, (ii) Sn-promoted NiO, and (iii) multicomponent MoVTeNbO with the M1 structure. The main difference in catalytic performance lies in the extent of the overoxidation of the ethylene formed, following the order VOx/Al2O3 > NiSnOx > MoVTeNb-M1. Accordingly, the selectivity to ethylene at medium and high ethane conversion follows the order MoVTeNb-M1 > NiSnOx > VOx/Al2O3. These results are confirmed by the relative reaction rates observed for the…

CHANGE IN VOLUME AND MORPHOLOGY IN CULTURES OF OLEISPIRA ANTARCTICA AS A FUNCTION OF TEMPERATURE AND SUBSTRATES USED

2015

Bacterial population under nutritional and physic stress react in order to adequate cell metabolism and physiology to stressful conditions. One of the most frequently observed behaviours in the stress-starvation response of gram-negative bacteria is the size reduction and cell morphology conversion from rod to resistant shape-form. In such framework, we report here on morphology (cell volume and cell shape) variations in psychrophilic strain Oleispira antarctica RB 8T under different growth temperature and different hydrocarbons mixtures sources. Six different hydrocarbons mixtures (car commercial diesel, commercial crude oil engine; 2 different bilge waters, military jet fuel and crude oil…

Coexpression of neurocalcin with other calcium-binding proteins in the rat main olfactory bulb

1999

The distribution patterns of four calcium-binding proteins (CaBPs)-calbindin D-28k (CB), calretinin (CR), neurocalcin (NC), and parvalbumin (PV)-in the rat main olfactory bulb were compared, and the degrees ofcolocalization of NC with the other CaBPs were determined by using double immunocytochemical techniques. All investigated CaBPs were detected in groups of periglomerular cells and Van Gehuchten cells, whereas other cell types expressed some of the investigated proteins but not all four. Double-labeling techniques demonstrated the colocalization of NC with CB, CR, or PV in periglomerular cells, whereas each neurochemical group constituted entirely segregated populations in the remaining…

Biomarker-guided management in acute heart failure: is there light at the end of the tunnel?

2020

Papillary thyroid microcarcinoma: extrathyroidal extension, lymph node metastases and risk factors for recurrence in a high prevalence of goiter area

2010

BACKGROUND. Papillary thyroid microcarcinoma (PTMC) is diagnosed with increasing frequency. Since risk factors for an aggressive clinical behavior have not been clearly delineated, the best therapeutic option and follow up protocol for PTMC have not been established yet, especially in case of incidental diagnosis after partial thyroidectomy for benign disease. We reviewed our series of patients with PMTC to determine risk factors for recurrence in a high prevalence of goiter area. METHODS. The medical records of all the patients who underwent total thyroidectomy (TT) with a final pathology report of PTMC between October 2002 and June 2007 were reviewed. Demographic, clinical and pathologica…

Prediction of paclitaxel resistance in breast cancer: is CYP1B1*3 a new factor of influence?

2008

This article focuses on the recent findings by Marsh and colleagues, and also discusses recent findings with regards to breast cancer. Taxanes are amongst the most active agents in the treatment of breast cancer. However, many tumors are intrinsically resistant. Therefore, it would be an enormous progress, if factors could be identified that reliably differentiate between taxane-sensitive and -resistant patients. Marsh and colleagues analyzed the CYP1B1*3 (Val432Leu) polymorphism in patients with high-risk stage III and IV breast cancer, who received dose-intense paclitaxel in combination with doxorubicin and cyclophosphamide. They report for the first time that patients with two leucine al…

Global and sex-specific epigenome-wide association studies for the identification of the main methylated loci related to smoking in a mediterranean p…

2019

Abstract Background Tobacco use has been reported to be the main cause of 90% of male and 80% of female lung cancers, as well as a relevant risk factor for other cancers such as oropharynx, larynx, esophagus, stomach, liver, pancreas, kidney, bladder, and colorectum. Smoking directly affects DNA methylation and although several genes have been reported to be differentially methylated in smokers, gender differences and population-specific differences remain to be further investigated. Our aim was to undertake global and sex-specific genome-wide epigenomic studies (EWAS) in a Mediterranean population to identify the main smoking DNA-methylated genes. Methods We analyzed 88 participants in the…

Coupling evanescently low loss Silicon-on-insulator (SOI) ridge waveguides(WGs) including high Q nanocavities: For light control

2011

We have fabricated a multislotted optical nanoresonator with several spatial field distributions which are all addressable by the wavelength. The reported structure consists in an array of evanescently coupled single mode photonic crystal nanocavities. By using a scanning near-field optical microscope, we quantify the morphology of the different optical mode volumes and show that they consist in grids of light confined at the subwavelength scaleOver the last recent years, optical microcavities have proven their ability to slow down, control and even trap light inside an ultra small volume. Several approaches have led to quality factor (Q) records allowing to reach high photon life-time for …

Cascadability and reshaping properties of a saturable absorber inserted inside a RZ transmission line for future 160-Gbit/s all-optical 2R-regenerato…

2007

International audience; In this prospective work, we analyze the behavior of a quantum-well microcavity saturable absorber component cascaded into a 100-km SMF RZ transmission line in order to annihilate the ghost-pulse phenomenon in the following simplified “...010101...” 160-Gbit/s 2-bit pattern at 1555 nm. Recirculating-loop experiments show a maximal ghost-pulse extinction up to 11.6 dB as well as an intensity extinction ratio enhancement higher than 6 dB over at least 800 km of propagation.

Oracion funebre, en las exequias que en 11 de Iulio del año 1699 hizo la Santa Metropolitana Iglesia de Valencia al ... Señor Don Fray Iuan Thomas …

1699

El f. de làm. és el retrat de Tomàs de Rocabertí Port. con orla tip. Caplletres ornades, fris Sign.: [ ]3, œœ2, A-E4, F3 Text amb postil·les marginals Reclams