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F Cisneros

Publications and source records attributed to F Cisneros.

At least 19 recordsLinked to original sources
PubMed1996

Comparison of transverse and longitudinal real-time ultrasound scans for prediction of lean cut yields and fat-free lean content in live pigs.

Live animal real-time ultrasound scans and carcass measures were taken on 80 pigs comprising two sexes (42 barrows; 38 gilts) and two halothane genotypes (40 carriers and 40 negatives) that were slaughtered between 108 and 148 kg live weight. Transverse scans (TRUS), at right angles to the midline, were taken on right (RS) and left (LS) sides at the last rib. Longitudinal scans (LON) were taken 6.5 cm off the midline immediately anterior (ANT) and posterior (PST) to the last rib on both the RS and LS. Longissimus muscle depth and area and backfat thickness over the longissimus muscle were measured on TRUS. Backfat thickness and longissimus muscle depth were measured at each end of the LON. Backfat thickness and longissimus muscle measurements were taken at the 10th and last rib on the RS of the carcass. Carcasses were fabricated using standard techniques to establish lean cut yields and carcass soft tissue was chemically analyzed to determine fat-free lean contents. Stepwise regression analysis was performed to develop equations to predict the weights and percentages of lean cuts and fat-free lean. Fat and muscle measures taken from ultrasound scans were generally less accurate than last rib carcass measures at predicting composition. There was little difference in R2 for equations based on either TRUS or ANT/LON; however, PST/LON, generally, were less accurate than ANT/LON. Combining measurements from more than one scan gave little improvement in R2 compared with the best single scan. Estimates of sex bias for carcass composition prediction were small. Halothane genotype and carcass lean content biases were detected; equations derived from the pooled data tended to overestimate the lean content of negative pigs and fatter carcasses and underestimate the lean content of carrier animals and leaner carcasses.

Animals↗
PubMed1996

Influence of slaughter weight on growth and carcass characteristics, commercial cutting and curing yields, and meat quality of barrows and gilts from two genotypes.

Pigs representing two crossbred genotypes, a breeding company hybrid (BCH) and a three breed cross (Hampshire x [Yorkshire x Duroc]) (HYD) were evaluated at five slaughter weights (SLW): 100, 115, 130, 145, and 160 kg. A total of 160 pigs were grown in like-sex (barrows [B] or gilts [G]), like-genotype groups, with four pigs/group, from 60 kg live weight. A corn-soybean meal-based diet was available on an ad libitum basis (15.8% crude protein, 3,300 kcal/kg ME). One-half of the pigs from each group (80 pigs) were slaughtered for carcass and meat quality evaluation. Genotype BCH grew faster, had lower backfat depths in the loin and lumbar regions, and a smaller loin eye area than HYD, but both groups had a similar gain:feed ratio. Few consistent genotype differences in cutting and curing yields and meat quality were observed. Differences between sexes for growth and carcass traits were generally in agreement with previous research; however, the magnitude of the differences was small. There were few nonlinear regressions involving SLW and limited differences between genotypes or sexes in the slopes of the linear regressions. Increases in SLW were associated with increases in feed intake, backfat depth and loin' eye area, and minimal changes in growth rate or gain:feed. Percentage of loin increased and ham, shoulder, and spare rib percentages decreased with slaughter weight. The weight of trimmed, boneless cuts increased with slaughter weight, but percentage trimmed, boneless cuts was reduced. Curing yields for belly increased with slaughter weight. Changes in meat quality with increasing slaughter weight were relatively small. Longissimus lumborum fat content increased and moisture content decreased with slaughter weight. These results suggest that modern genotypes can be slaughtered at live weights up to 160 kg with limited impact on growth performance, commercial meat yields, or meat quality characteristics.

Abattoirs↗
PubMed1990

Percutaneous intrathoracic aspiration biopsy.

An analysis of 617 percutaneous intrathoracic aspiration biopsies (PIAB) performed on 587 patients with pulmonary and mediastinal lesions between 1954 and 1985 are presented. The effectiveness of the procedure between 1954 and 1980 and between 1981 and 1985 with a positivity of 71.6% and 84.9%, respectively, was compared. These results are statistically significant and reflect improvement in the technique employed. A greater positivity was found where the lesion measured 2 to 3 cm in diameter. Complications for this series were 7.8%. In diffuse infiltrating lesions, the positivity is less than that obtained for the whole series, and the risk of developing a pneumothorax is greater. The false-negative cases include those in which an inadequate sample was obtained for diagnosis (13.9% of the total series) and samples containing elements of the chest wall or blood (5.2%).

Adolescent↗
PubMedDate not supplied

Cardiac and pulmonary diseases. A pathophysiologic interelationship.

Left heart diseases, in particular mitral stenosis, are often associated with anatomic and functional alterations of the lung. According to the pulmonary structures involved they could be named chronic secondary intersticial and vascular lung diseases. Congenital heart diseases with pre- or post-tricuspid shunts are also often associated with anatomic and functional alterations of the lung. This condition also constitutes a chronic secondary vascular lung disease (atrial septal defect) or a chronic primary vascular lung disease ( ventricular septal defect, patent ductus arteriosus). Primary lung diseases (interstitial pulmonary fibrosis, pulmonary emphysema, recurrent pulmonary embolism) are often associated with right ventricular hypertrophy with or without dilation, a condition commonly named chronic cor pulmonale. On the whole the interrelationships between heart and lung diseases are as follows: a) anatomic and functional alterations of the lung due to left heart diseases are mediated through pulmonary venous hypertension; b) anatomic and functional alterations of the lung due to congenital heart diseases are mediated through the increased pulmonary blood flow with or without transmission of the systemic blood pressure to the pulmonary vasculature, and c) anatomic and functional alterations of the right ventricle due to primary or secondary lung diseases are mediated through arterial pulmonary hypertension. In summary, the interrelationships between heart and lung diseases are mainly mediated through the pulmonary venous or pulmonary arterial hypertension.

Blood Pressure↗