6,807 research outputs found
Charmed hadrons in nuclear medium
We study the properties of charmed hadrons in dense matter within a
coupled-channel approach which accounts for Pauli blocking effects and meson
self-energies in a self-consistent manner. We analyze the behaviour in this
dense environment of dynamically-generated baryonic resonances as well as the
open-charm meson spectral functions. We discuss the implications of the
in-medium properties of open-charm mesons on the and the
predicted X(3700) scalar resonances.Comment: 4 pages, 5 figures, invited parallel talk in the 5th International
Conference on Quarks and Nuclear Physics (QNP09), Beijing, September 21-26,
200
Photobioreactor Design and Fluid Dynamics
Photobioreactor design is a subject of great relevance for the attainment of a sustained development in modern technology,and has also considerable interest from the basic scientific and technologic point of view.The aim of the present review paper is presenting and comparing some of the recent attempts by the authors of modelling photosynthesis in reactors.A short inspection of the kinetic models proposed for photobioreactor design is done,and some examples of the integration of such kinetic models and bioreactor fluid dynamics in the modelling of photobioreactors are presented
Strange and charm mesons at FAIR
We study the properties of strange and charm mesons in hot and dense matter
within a self-consistent coupled-channel approach for the experimental
conditions of density and temperature expected for the CBM experiment at
FAIR/GSI. The in-medium solution at finite temperature accounts for Pauli
blocking effects, mean-field binding of all the baryons involved, and meson
self-energies. We analyze the behaviour in this hot and dense environment of
dynamically-generated baryonic resonances together with the evolution with
density and temperature of the strange and open-charm meson spectral functions.
We test the spectral functions for strange mesons using energy-weighted sum
rules and finally discuss the implications of the properties of charm mesons on
the D_{s0}(2317) and the predicted X(3700) scalar resonances.Comment: 12 pages, 9 figures, invited talk at XXXI Mazurian Lakes Conference
on Physics: Nuclear Physics and the Road to FAIR, August 30-September 6,
2009, Piaski, Polan
Role of Mo in catalysts based on noble metals in hydrodeoxygenation reactions
The use of bio-energy as a renewable alternative to fossil fuels is nowadays attracting more and more
attention. The bio-fuel from biomass seems to be a potential energy substitute for fossil fuels since it is a renewable resource that could contribute to sustainable development and global environmental preservation and it appears to have significant economic potential1. The problem is its high oxygen content, which gives undesirable properties for combustion. To remove oxygen, catalytic hydrodeoxygenation (HDO) reactions are carried out. Monometallic Mo/Si, Pt/Si as well as bimetallic PtMo/Si catalysts were prepared
and evaluated in the hydrodeoxygenation (HDO)reaction of dibenzofurane (DBF) as a model molecule in biomass derived bio-oil.Universidad de Málaga. Campus de Excelencia Internacional AndalucĂa Tech
Charmed mesons in nuclear matter
We obtain the properties of charmed mesons in dense matter using a
coupled-channel approach which accounts for Pauli blocking effects and meson
self-energies in a self-consistent manner. We study the behaviour of
dynamically-generated baryonic resonances together with the open-charm meson
spectral functions in this dense nuclear environment. We discuss the
implications of the in-medium properties of open-charm mesons on the
and the predicted X(3700) scalar resonances, and on the
formation of -mesic nuclei.Comment: 5 pages, 5 figures, 1 table, to appear in Proceedings of XIII
International Conference on Hadron Spectroscopy, November 29 - December 4,
2009, Florida State Universit
Plasma Non-Enzymatic Antioxidant Capacity (NEAC) in Relation to Dietary NEAC, Nutrient Antioxidants and Inflammation-Related Biomarkers
The results presented in this article constitute part of the C.J. CarriĂłn-GarcĂa’s Doctoral Thesis
performed in the Nutrition and Food Science Doctorate Program of the University of Granada.(1) Background: Little is known about the interlinkages between dietary and plasma
non-enzymatic antioxidant capacity (D-NEAC and P-NEAC, respectively) and the body’s antioxidant
and inflammation response. Our aim was to explore these associations in 210 participants from two
Spanish European Prospective Investigation into Cancer and Nutrition (EPIC) centers. (2) Methods:
D-NEAC was estimated using published NEAC values in food. P-NEAC and total polyphenols
(TP) were quantified by FRAP (ferric-reducing antioxidant power), TRAP (total radical-trapping
antioxidant parameter), TEAC-ABTS (trolox equivalent antioxidant capacity-Azino Bis Thiazoline
Sulfonic), ORAC (oxygen radical absorbance capacity) and Folin–Ciocalteu assays. Nutrient antioxidants
(carotenes, α-tocopherol, ascorbic acid, retinol, uric acid, Q9 and Q10 coenzymes) and inflammation
markers (IL-6, IL-8, CRP, TNF-α, PAI-I, resistin and adiponectin) were also analyzed. Spearman correlation
and linear regression analyses were performed in association analyses. Analyses were stratified by
covariates and groups were defined using cluster analysis. (3) Results: P-FRAP was correlated with
D-NEAC, and significantly associated with P-NEAC in multivariate adjusted models. P-FRAP levels
were also significantly associated with plasma antioxidants (log2 scale: TP β = 0.26; ascorbic acid
β = 0.03; retinol β = 0.08; α-tocopherol β = 0.05; carotenes β = 0.02; Q10 β = 0.06; uric acid β = 0.25),
though not with inflammation-related biomarkers. Different profiles of individuals with varying levels
of P-NEAC and biomarkers were found. (4) Conclusions: P-NEAC levels were to some extent associated
with D-NEAC and plasma antioxidants, yet not associated with inflammation response.This research was co-funded by the Health Research Found (FIS), Acción Estratégica en Salud (AES),
of the Spanish Ministry of Economy and Competitiveness, grant number PI12/00002, and the European Regional
Development Fund (ERDF)
Spanish study of anticoagulation in haemodialysis
This study's objectives were to determine which anticoagulation
methods are commonly used in patients who are undergoing haemodialysis (HD) in
Spain, on what criteria do they depend, and the consequences arising from their
use. MATERIAL AND METHOD: Ours was a cross-sectional study based on two types of
surveys: a "HD Centre Survey" and a "Patient Survey". The first survey was
answered by 87 adult HD units serving a total of 6093 patients, as well as 2
paediatric units. Among these units, 48.3% were part of the public health system
and the remaining 51.7% units were part of the private health system. The patient
survey analysed 758 patients who were chosen at random from among the
aforementioned 78 HD units. RESULTs: A) HD Centre Survey: The majority of adult
HD units (n=61, 70.2%) used both kinds of heparin, 19 of them (21.8%) only used
LMWH and 7 of them (8%) only used UFH. The most frequently applied criteria for
the use of LMWH were medical indications (83.3% of HD units) and ease of
administration (29.5%). The most frequently used methods for adjusting the dosage
were clotting of the circuit (88.2% of units), bleeding of the vascular access
after disconnection (75.3%), and patient weight (57.6%). B) Patient Survey: The
distribution of the types of heparin used was: UFH: 44.1%, LMWH: 51.5%, and
dialysis without heparin in 4.4% of patients. LMWH was more frequently used in
public medical centres (64.2% of patients) than in private medical centres
(46.1%) (P<.001). LMWH was more frequently used in on-line haemodiafiltration
(HF) than in high-flux HD (P<.001). Antiplatelet agents were given to 45.5% of
patients, oral anticoagulants to 18.4% of patients, and both to 5% of patients.
Additionally, 4.4% of patients had suffered bleeding complications during the
previous week, and 1.9% of patients suffered thrombotic complications. Bleeding
complications were more frequent in patients with oral anticoagulants (P=.001),
although there was no association between the type of heparin and the occurrence
of bleeding or thrombotic complications. CONCLUSIONS: We are able to conclude
that there is a great amount of disparity in the criteria used for the medical
prescription of anticoagulation in HD. It is advisable that each HD unit revise
their own results as well as those from other centres, and possibly to create an
Anticoagulation Guide in Haemodialysis
Energy Deposition around Swift Carbon-Ion Tracks in Liquid Water
Energetic carbon ions are promising projectiles used for cancer radiotherapy. A thorough knowledge of how the energy of these ions is deposited in biological media (mainly composed of liquid water) is required. This can be attained by means of detailed computer simulations, both macroscopically (relevant for appropriately delivering the dose) and at the nanoscale (important for determining the inflicted radiobiological damage). The energy lost per unit path length (i.e., the so-called stopping power) of carbon ions is here theoretically calculated within the dielectric formalism from the excitation spectrum of liquid water obtained from two complementary approaches (one relying on an optical-data model and the other exclusively on ab initio calculations). In addition, the energy carried at the nanometre scale by the generated secondary electrons around the ion's path is simulated by means of a detailed Monte Carlo code. For this purpose, we use the ion and electron cross sections calculated by means of state-of-the art approaches suited to take into account the condensed-phase nature of the liquid water target. As a result of these simulations, the radial dose around the ion's path is obtained, as well as the distributions of clustered events in nanometric volumes similar to the dimensions of DNA convolutions, contributing to the biological damage for carbon ions in a wide energy range, covering from the plateau to the maximum of the Bragg peak
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