Effect of within-species plant genotype mixing on habitat preference of a polyphagous insect predator

The effects of within-species plant genotype mixing on the habitat preference of a polyphagous ladybird were studied. Plant species diversity is often claimed to positively affect habitat preferences of insect predators, but the effects of within-species genotype diversity have not been extensively studied. In a field experiment with different barley (Hordeum vulgare) genotypes in mixed and pure stands, adult seven-spot ladybird Coccinella septempunctata, a polyphagous predator, preferred a specific combination of genotypes over the single genotypes alone before aphids had arrived in the crop, and again when aphids were emigrating. In laboratory experiments on adult ladybird orientation to odour from barley, ladybirds were attracted/arrested by the mixed odour of the same barley genotype mixture that was preferred in the field. Exposure of one barley genotype to volatiles from the other also caused the odour of the exposed plants to become more attractive to ladybirds. The results support the hypothesis that plant volatiles may attract or arrest foraging adult ladybirds, contributing to the selection of favourable habitats, and they show that within-species plant genotype mixing can shape interactions within multitrophic communities

Resection of the Liver for Colorectal Carcinoma Metastases A Multi-institutional Study of Long-term Survivors

In this review of a collected series of patients undergoing hepatic resection for colorectal metastases, 100 patients were found to have survived greater than five years from the time of resection. Of these 100 long-term survivors, 71 remain disease-free through the last follow-up, 19 recurred prior to five years, and ten recurred after five years. Patient characteristics that may have contributed to survival were examined. Procedures performed included five trisegmentectomies, 32 lobectomies, 16 left lateral segmentectomies, and 45 wedge resections. The margin of resection was recorded in 27 patients, one of whom had a positive margin, nine of whom had a less than or equal to l-cm margin, and 17 of whom had a greater than 1-cm margin. Eighty-one patients had a solitary metastasis to the liver, 11 patients had two metastases, one patient had three metastases, and four patients had four metastases. Thirty patients had Stage C primary carcinoma, 40 had Stage B primary carcinoma, and one had Stage A primary carcinoma. The disease-free interval from the time of colon resection to the time of liver resection was less than one year in 65 patients, and greater than one year in 34 patients. Three patients had bilobar metastases. Four of the patients had extrahepatic disease resected simultaneously with the liver resection. Though several contraindications to hepatic resection have been proposed in the past, five-year survival has been found in patients with extrahepatic disease resected simultaneously, patients with bilobar metastases, patients with multiple metastases, and patients with positive margins. Five-year disease-free survivors are also present in each of these subsets. It is concluded that five-year survival is possible in the presence of reported contraindications to resection, and therefore that the decision to resect the liver must be individualized

Frequência alélica de SNPS relacionados à termotolerância em raças bovinas criadas no Brasil.

Comissão organizadora: Denise Baptaglin Montagner, Grácia Maria Soares Rosinha, Rodrigo Carvalho Alva

Population receptive field tuning properties of visual cortex during childhood 2016-2019

The aim of this study was to investigate if spatial tuning functions of populations of neurons in visual cortex are adult-like or are still developing / becoming more precise from the age of 6 years onward. We found no significant differences in pRF tuning properties. There are many reports of improved precision of basic visual visuospatial perception in childhood, but it is unclear to which extent this depends on greater precision of information in the system, or more efficient read-out of this information by higher-order brain areas that form decisions and responses. Results from pRF model fits combined with cortical surface measures are reported here.There are many reports of improved precision of basic visual visuospatial perception in childhood, but it is unclear to which extent this depends on greater precision of information in the system, or more efficient read-out of this information by higher-order brain areas that form decisions and responses. The aim of this study was to investigate if spatial tuning functions of populations of neurons in visual cortex are adult-like or are still developing / becoming more precise from the age of 6 years onward.</p

(T/E) Further Measurements of Parity Non-Conservation in Inelastic Electron Scattering

We have extended our earlier measurements of parity violating asymmetries in the inelastic scattering of longitudinally polarized electrons from deuterium to cover the range 0.15 5 y I 0.36. The observed asymmetry shows only slight y dependence over this range. Our results are consistent with the expectations of the Weinberg-Salam model for a value of sin2eW = 0.224 Z!I 0.020. (Submitted to Phys. Lett.) Work supported by the Department EY-76-C-03-0515. of Energy under contract number Permanent addresses