360 research outputs found
NOVAS POPULAÇÕES DO MICO-lEÃO CAlÇARA, LEONTOPITHECUS CAISSARA (LORINI & PERSSON, 1990) NO SUDESTE DO BRASIL (PRIMATES - CALLITRICHIDAE)
o presente trabalho apresenta a distribuição de novas populações da espécie Leontopithecus caissara no litoral sul do Estado de São Paulo (PRIMATES - CALLlTRICHIDAE). A distribuição antes conhecida desta espécie restringia-se somente a sua localidade - tipo, IIhadeSuperaguà (25°18'S, 48°11 'W) no Paranáeáreas adjacentes ao continente deste estado. Nossas investigações ampliam em cerca de 130 km2 a áreade ocorrência desta espécie, apresentando pelo menos três populações distintas. São apresentadas também notas sobre a sua biologia
meat quality traits of marchigiana beef cattle
Variation in quality of meat within the same breed and among different ones is due both to different biological factor (genotype, productivity, sex and age) and environmental and technological factors (composition and nutritional level of diet, rearing, transport and slaughter) acting on animals reared . All these factors interact in a complex way and lead to a high variability of muscular structure that characterizes the qualitative characteristic of meat. For this reason, in a study that expected the control at slaughter of 1000 Marchigiana cattle, on a random, 114 sample's steaks were taken from LD at 5th rib, right side of carcasses grading U or more in SEUROP grid. On meat samples, we tested colour parameters (L*a*b*) using Minolta Chromameter CR 200 and light D65 and Drip Loss as reported by ASPA Commission (1996). Then meat samples were weighted, frozen, lyophilized; their chemical composition (moisture, protein and fat) was determined. Variability of analysis' results was studied according to JMP package (SAS).The colour means (L*, a*, b*) were obtained considering at least 3 readings on every sample. Luminosity value (L* = 40.1 ± 3.6) is similar to the one reported on subjects transported for 1-4 hours, similarly to the Marchigiana cattle object of this study, while is higher than the mean reported by other researchers on Valdostana cattle, English crossbreds and on Charolaise x Maremmana crossbreds. The red parameter (a* = 25.0 ± 3.2) is better than means reported by the same researchers. The yellow parameter (b* = 6.9 ± 2.5) is similar to results obtained on Valdostana cattle, but lower that means obtained by other researchers. The Hue values are lower than those reported for Charolaise x Maremmana (15.1 vs 26.1), while Chroma (26.1 ± 3.7) is similar to the values obtained by the same researchers. The moisture (72.8 ± 1.2) is similar to the mean obtained on Chianina calves, but lower than the one indicated on Marchigiana bulls. The protein (19.8 ± 1.6) is lower than that obtained on Marchigiana cattle. The intramuscular fat (3.9 ± 1.5) is higher than results obtained on Marchigiana calves. The Drip Loss (1.4 ± 0.5) is 1 point % lower than those reported by other researchers. This low Drip Loss can be considered a parameter that indicates a good muscular maturity of slaughtered cattle. All parameters have a low variability except for fat (33.1%) and Drip Loss (35.7%). The Marchigiana cattle confirms the good qualitative characteristics of its meat, and strengthen the opportunity to increase the number of Marchigiana heads to be bred and raisen
CHALLENGING ARCHITECTURES: AN INTEGRATED AND MULTIPURPOSE SURVEY FOR THE COMPLETE MAPPING OF THE EMIR PALACE IN KOGON (UZBEKISTAN)
The documentation of Cultural Heritage, and in particular architecture, is nowadays conducted with a combination of several geomatic techniques. Most of them relies on the exploitation of 3D point cloud, which is the state of art data to produce almost every output. The starting point of each recovery intervention is the survey, which enable a multidisciplinary approach for the knowledge of a building and, consequently, to preserve it for future generation. When it comes with complex architectures, however, the surveying approach is more compelling and challenging at the same time. The definition of the final accuracy requires a tidy design process that should be done a priori, and a set of strict rules need to be respected. With the advent of new automatic procedures, the number of data collected increases, but this doesn’t mean that well established method, like topography, can be neglected. This work is the demonstration of how old and new method must coexist. The present work describes the work carried out to the complete 3D reconstruction of a complex building, namely the Emir’s Palace place in Kogon, Uzbekistan. Given its dimension and decorative apparatus, maintaining a high standard of definition without losing metrological accuracy was the main challenge. The work was carried out with a combination of both Terrestrial Laser Scanner and Aerial Photogrammetry for the 3D reconstruction, and on a very accurate topographic network for the combination of produced point clouds. The result of this first phase of the work was a polygonal network with a millimetric accuracy. Besides, another important contribution of the paper lies on the exploitation of the panoramic images coming from the TLS within a photogrammetric software. Indeed, by exploiting the depth map, it was possible to produce very detailed orthophotos for the production of 1:10 scale drawings. The work, performed in a joint venture between Academia and SMEs, is an excellent example (useful to be shared within the research community dealing with 3D representation and optimization) of innovative methodologies developed to produce reliable drawings and 3D representation for different purposes, being the starting point for each kind of project
Influence of indigenous starter coltures on the free fatty acids release during ripening in artisan sausages produced in the Basilicata region.
The influence of indigenous starter cultures on the free fatty acids content during ripening of \ubbsalsiccia\uab, a typical dry fermented sausage produced in the Basilicata region, was studied. Three batches of \ubbsalsiccia\uab were produced using different starter mixtures (Lactobacillus sakei G20 and Staphylococcus xylosus S81; L. sakei G20 and S. xylosus S142; L. sakei G20 and S. xylosus S206), while the control batch was produced without a starter. The amounts of free fatty acids present in the samples at the end of the ripening period were not significantly different, suggesting that the lipolytic enzymes naturally occurring in meat could play a predominant role in the free fatty acids release. Oleic and linoleic acids were present in the highest concentrations, while only small quantities of short chain fatty acids were detected, with acetic acid being the most representative one
Multislice computed tomography in an asymptomatic high-risk population
Approximately 50% of all acute coronary syndromes occur in previously asymptomatic patients. This study evaluated the value of multislice computed tomography for early detection of significant coronary artery disease (CAD) in high-risk asymptomatic subjects. One hundred sixty-eight asymptomatic subjects with >or=1 major risk factor (hypertension, diabetes, hypercholesterolemia, family history, or smoking) and an inconclusive or unfeasible noninvasive stress test result (stress electrocardiography, echocardiography, or nuclear scintigraphy) were evaluated in an outpatient setting. After clinical examination and laboratory risk analysis, all patients underwent multislice computed tomographic (MSCT) coronary angiography within 1 week. In all subjects, conventional coronary angiography was also carried out. Multislice computed tomography displayed single-vessel CAD in 16% of patients, 2-vessel CAD in 7%, and 3-vessel CAD in 4%. Selective coronary angiography confirmed the results of multislice computed tomography in 99% of all patients. Sensitivity and specificity of MSCT coronary angiography were 100% and 98%, respectively, with a positive predictive value of 95% and a negative predictive value of 100%. In conclusion, MSCT coronary angiography is an excellent noninvasive technique for early identification of significant CAD in high-risk asymptomatic patients with inconclusive or unfeasible noninvasive stress test results
Casing contribution to proteolytic changes and biogenic amines content in the production of an artisanal naturally fermented dry sausage
The effect of two kinds of casings on the production and characteristics of a dry fermented sausage was investigated. In detail, an Italian product, naturally fermented at low temperatures and normally wrapped in beef casing instead of the most diffused hog one, was selected. Two different productions (one traditionally in beef casing (MCB) and another in hog casing (MCH)) were investigated over time to determine the differences particularly regarding proteolytic changes during fermentation and ripening. First of all, the product in hog casing required a longer ripening time, up to 120 days, instead of 45–50 days, because of the lower drying rate, while the microbial dynamics were not significantly modified. Conversely, the proteolysis showed a different evolution, being more pronounced, together with the biogenic amines content up to 341 mg/Kg instead of 265 mg/Kg for the traditional products. The latter products were instead characterized by higher quantities of total free amino acids, 3-methyl butanoic acid, 3-Methyl-1-butanal, and 2-Methylpropanal, enriching the final taste and aroma. The traditional product MCB also showed lower hardness and chewiness than MCH. The results highlight how the choice of casing has a relevant impact on the development of the final characteristics of fermented sausages
Exploring the capability of yeasts isolated from colombian fermented cocoa beans to form and degrade biogenic amines in a lab-scale model system for cocoa fermentation
Yeast starters for cocoa fermentation are usually tested according to their enzymatic activities in terms of mucilage degradation and flavor improvement, disregarding their influence on the production or elimination of toxic compounds as biogenic amines (BAs), important for human health. In this work, we tested 145 strains belonging to 12 different yeast species and isolated from the Colombian fermented cocoa beans (CB) for their capability of producing BAs in vitro. Sixtyfive strains were able to decarboxylate at least one of the amino acids tested. Pichia kudriavzevii ECA33 (Pk) and Saccharomyces cerevisiae 4 (Sc) were selected to evaluate their potential to modulate BAs, organic acids, and volatile organic compounds (VOCs) accumulation during a simulated cocoa fermentation. The growth of Sc or Pk in the presence of CB caused a significant reduction (p < 0.05) of 2-phenylethylamine (84% and 37%) and cadaverine (58% and 51%), and a significant increase of tryptamine and putrescine with a strong influence of temperature in BA formation and degradation. In addition, our findings pointed out that Pk induced a major production of fatty acidand amino acid-derived VOCs, while Sc induced more VOCs derived from fatty acids metabolism. Our results suggest the importance of considering BA production in the choice of yeast starters for cocoa fermentation
Evaluation of early coronary graft patency after coronary artery bypass graft surgery using multislice computed tomography angiography
Diagnosis of obstructive coronary artery disease using computed tomography angiography in patients with stable chest pain depending on clinical probability and in clinically important subgroups: meta-analysis of individual patient data
OBJECTIVE:
To determine whether coronary computed tomography angiography (CTA) should be performed in patients with any clinical probability of coronary artery disease (CAD), and whether the diagnostic performance differs between subgroups of patients.
DESIGN:
Prospectively designed meta-analysis of individual patient data from prospective diagnostic accuracy studies.
DATA SOURCES:
Medline, Embase, and Web of Science for published studies. Unpublished studies were identified via direct contact with participating investigators.
ELIGIBILITY CRITERIA FOR SELECTING STUDIES:
Prospective diagnostic accuracy studies that compared coronary CTA with coronary angiography as the reference standard, using at least a 50% diameter reduction as a cutoff value for obstructive CAD. All patients needed to have a clinical indication for coronary angiography due to suspected CAD, and both tests had to be performed in all patients. Results had to be provided using 2×2 or 3×2 cross tabulations for the comparison of CTA with coronary angiography. Primary outcomes were the positive and negative predictive values of CTA as a function of clinical pretest probability of obstructive CAD, analysed by a generalised linear mixed model; calculations were performed including and excluding non-diagnostic CTA results. The no-treat/treat threshold model was used to determine the range of appropriate pretest probabilities for CTA. The threshold model was based on obtained post-test probabilities of less than 15% in case of negative CTA and above 50% in case of positive CTA. Sex, angina pectoris type, age, and number of computed tomography detector rows were used as clinical variables to analyse the diagnostic performance in relevant subgroups.
RESULTS:
Individual patient data from 5332 patients from 65 prospective diagnostic accuracy studies were retrieved. For a pretest probability range of 7-67%, the treat threshold of more than 50% and the no-treat threshold of less than 15% post-test probability were obtained using CTA. At a pretest probability of 7%, the positive predictive value of CTA was 50.9% (95% confidence interval 43.3% to 57.7%) and the negative predictive value of CTA was 97.8% (96.4% to 98.7%); corresponding values at a pretest probability of 67% were 82.7% (78.3% to 86.2%) and 85.0% (80.2% to 88.9%), respectively. The overall sensitivity of CTA was 95.2% (92.6% to 96.9%) and the specificity was 79.2% (74.9% to 82.9%). CTA using more than 64 detector rows was associated with a higher empirical sensitivity than CTA using up to 64 rows (93.4% v 86.5%, P=0.002) and specificity (84.4% v 72.6%, P<0.001). The area under the receiver-operating-characteristic curve for CTA was 0.897 (0.889 to 0.906), and the diagnostic performance of CTA was slightly lower in women than in with men (area under the curve 0.874 (0.858 to 0.890) v 0.907 (0.897 to 0.916), P<0.001). The diagnostic performance of CTA was slightly lower in patients older than 75 (0.864 (0.834 to 0.894), P=0.018 v all other age groups) and was not significantly influenced by angina pectoris type (typical angina 0.895 (0.873 to 0.917), atypical angina 0.898 (0.884 to 0.913), non-anginal chest pain 0.884 (0.870 to 0.899), other chest discomfort 0.915 (0.897 to 0.934)).
CONCLUSIONS:
In a no-treat/treat threshold model, the diagnosis of obstructive CAD using coronary CTA in patients with stable chest pain was most accurate when the clinical pretest probability was between 7% and 67%. Performance of CTA was not influenced by the angina pectoris type and was slightly higher in men and lower in older patients.
SYSTEMATIC REVIEW REGISTRATION:
PROSPERO CRD42012002780
- …