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Salta, Argentina

Learreta J.A.,Catholic University of Salta | Barrientos E.E.,Post Graduate Orthodontic Society of Corrientes
Cranio - Journal of Craniomandibular Practice | Year: 2014

Aims: The presence of different types of bacteria in the temporomandibular joint (TMJ) is considered an etiological factor in TMJ pathologies. Mycoplasma pneumonia (MP), for instance, can be present in different joint pathologies. The aim of the present study is to correlate pathognomonic imaging of the TMJ in nuclear magnetic resonance with laboratory tests for MP.Methodology: From an overall population of 300 patients with TMJ pathologies and without history of MP infections, 90 patients were studied through nuclear magnetic resonance imaging and laboratory tests for MP.Results: There was an actual correlation between imaging and laboratory studies, thus underlying the importance of anamnesis, image interpretation, and laboratory results in the diagnosis of TMJ pathologies.Conclusions: The present study confirms the importance of imaging interpretation in TMJ pathologies and its correlation with MP laboratory tests. © W. S. Maney & Son Ltd 2014.

Ceruti M.C.,Catholic University of Salta
BioMed Research International | Year: 2015

This study will focus on frozen mummies of sacrificial victims from mounts Llullaillaco (6739 m), Quehuar (6130 m), El Toro (6160 m), and the Aconcagua massif. These finds provide bioarchaeological data from mountaintop sites that has been recovered in scientifically controlled excavations in the northwest of Argentina, which was once part of the southern province of the Inca Empire. Numerous interdisciplinary studies have been conducted on the Llullaillaco mummies, including radiological evaluations by conventional X-rays and CT scans, which provided information about condition and pathology of the bones and internal organ, as well as dental studies oriented to the estimation of the ages of the three children at the time of death. Ancient DNA studies and hair analysis were also performed in cooperation with the George Mason University, the University of Bradford, and the Laboratory of Biological Anthropology at the University of Copenhagen. Ethnohistorical sources reveal interesting aspects related to the commemorative, expiatory, propitiatory, and dedicatory aspects of human sacrifice performed under Inca rule. The selection of the victims along with the procedures followed during the performance of the capacocha ceremony will be discussed, based on the bioarchaeological evidences from frozen mummies and the accounts recorded by the Spanish chroniclers. © 2015 Maria Constanza Ceruti.

Naesgaard P.A.,University of Stavanger | Naesgaard P.A.,University of Bergen | Leon de la Fuente R.A.,University of Stavanger | Leon de la Fuente R.A.,University of Bergen | And 7 more authors.
PLoS ONE | Year: 2012

Background: Several studies have shown an association between vitamin D deficiency and cardiovascular risk. Vitamin D status is assessed by determination of 25-hydroxyvitamin D [25(OH)D] in serum. Methods: We assessed the prognostic utility of 25(OH)D in 982 chest-pain patients with suspected acute coronary syndrome (ACS) from Salta, Northern Argentina. 2-year follow-up data including all-cause mortality, cardiac death and sudden cardiac death were analyzed in quartiles of 25(OH)D, applying univariate and multivariate analysis. Results: There were statistically significant changes in seasonal 25(OH)D levels. At follow-up, 119 patients had died. The mean 25(OH)D levels were significantly lower among patients dying than in long-term survivors, both in the total population and in patients with a troponin T (TnT) release (n = 388). When comparing 25(OH)D in the highest quartile to the lowest quartile in a multivariable Cox regression model for all-cause mortality, the hazard ratio (HR) for cardiac death and sudden cardiac death in the total population was 0.37 (95% CI, 0.19-0.73), p = 0.004, 0.23 (95% CI, 0.08-0.67), p = 0.007, and 0.32 (95% CI, 0.11-0.94), p = 0.038, respectively. In patients with TnT release, the respective HR was 0.24 (95% CI, 0.10-0.54), p = 0.001, 0.18 (95% CI, 0.05-0.60), p = 0.006 and 0.25 (95% CI, 0.07-0.89), p = 0.033. 25(OH)D had no prognostic value in patients with no TnT release. Conclusion: Vitamin D was shown to be a useful biomarker for prediction of mortality when obtained at admission in chest pain patients with suspected ACS. Trial registration: ClinicalTrials.gov NCT01377402 © 2012 Naesgaard et al.

Quintana M.V.,National University of Salta | Quintana M.V.,Catholic University of Salta | Nallim L.G.,National University of Salta
International Journal of Mechanical Sciences | Year: 2013

A general variational formulation for the determination of natural frequencies and mode shapes of free vibration of symmetric laminated plates of trapezoidal and triangular shapes is presented in this work. The kinematics corresponding to the first-order shear deformation plate theory (FSDT) is used to take into account the effects of shear deformation and rotational inertia in the analysis. The developed approach is based on the Ritz method and the plate geometry is approximated by non-orthogonal right triangular co-ordinates. The transverse deflection and two rotations of the laminate are independently approximated by sets of simple polynomials. The algorithm allows obtaining approximate analytical solutions for laminated plates with different shapes, aspect ratio, number of layers, stacking sequence, angle of fiber orientation and boundary conditions including translational and rotational elastically restrained edges. The algorithm is simple to program and numerically stable. © 2013 Elsevier Ltd.

Aller J.F.,Instituto Nacional de Tecnologia Agropecuaria | Cancino A.K.,Instituto Nacional de Tecnologia Agropecuaria | Rebuffi G.E.,Catholic University of Salta | Alberio R.H.,Instituto Nacional de Tecnologia Agropecuaria
Animal Reproduction Science | Year: 2010

Two experiments were conducted to determine the effect of estradiol benzoate (EB) and intravaginal progestagen treatment on ovarian follicular dynamics and superstimulatory response in eCG-treated llamas. The purpose of Experiment 1 was to evaluate the effect of EB and progestagen treatment starting at different phases of dominant follicle (DF1) development on regression pattern and subsequent follicle wave emergence (WE2) in lactating and non-lactating llamas. Early lactating (n = 24, 30 ± 4 days postpartum) and non-lactating (n = 24) females were assigned in equal numbers (n = 8) to one of three groups according to the phase of DF1 (growing, static or regressing) determined by ultrasonography from day -3 to day 0. At day 0, llamas received an intravaginal sponge (MPA, 150 mg) and 5 mg of MPA (i.m.). Half of the females (n = 4) of each group were injected with 2 mg (i.m.) of EB and half were not (control group). A 2 × 2 × 3 (lactational status, EB treatment and follicular phases) factorial design was used. Each sponge was removed 8 days later. Ovaries were monitored from day 0 to day 12. Daily blood samples were taken to determine 17β-estradiol (E2) profiles from day 0 to day 8. The DF1 regression pattern was not affected (P > 0.05) by the phase of follicle wave at the start of the treatment or any interactions among main effects. Follicle wave emergence in EB-treated llamas was delayed (P < 0.05) by 2.3 days compared with non-treated llamas. Following EB treatment, plasma concentrations of E2 were greater (P < 0.05) from day 1 to day 5 in the treated than in non-treated females, but not from day 6 onward (P > 0.05). Experiment 2 was designed to evaluate the effect of this treatment on the ovarian superovulatory response and embryo yield following eCG treatment administered on day of follicular wave emergence as determined in the Experiment 1. The same lactating (n = 18, 61 ± 4 days postpartum) and non-lactating (n = 18) llamas at random stages of follicle wave were treated as those in Experiment 1 and received 1200 IU of eCG at the time of WE2 (EB-treated = day 6.5 and non-treated = day 4.5). Llamas were mated 5 days after sponge withdrawal. A second mating was allowed 24 h later. Embryos were collected between 7 and 8 days after the first mating and blood samples were taken to determine progesterone (P4) concentrations. The mean number of follicles on day of mating and the number of CL on day of embryo collection were not affected by lactational status, EB treatment or their interactions (P > 0.05). Ovulation rate and mean (±SEM) number of recovered embryos for EB treatment group (67.5% and 2.4 ± 0.4) were greater (P < 0.05) than for no EB treatment (51.1% and 1.1 ± 0.4). Plasma P4 concentrations and number of CL per llama were correlated (r = 0.49; P = 0.014). In conclusion, progestagen plus EB treatment facilitates the prediction of the emergence of a new follicular wave approximately 6 days after treatment and resulted in a higher ovulation rate and embryo production in ovarian superstimulated llamas regardless of lactational status. © 2010 Elsevier B.V. All rights reserved.

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