Notes on the Effects of Pretreatment of Spores on the Iodinophile Vacuole of Henneguya exilisl

Spores of Henneguya exilis from the gills of Ictalurus punctatus were exposed to Lugol\u27s solution, Best\u27s carmine, Bauer-Feulgen reaction, and Mitchell\u27s ammoniacal silver nitrate techniques in smears and sections. All of the techniques recognized as specific for glycogen stained the iodinophile vacuole selectively but not specifically, but adjustments to techniques were required. Fresh spores held at room temperatures or chilled for 24 hours were similar insofar as the iodinophile vacuole is concerned, and freezing had little effect. A week or more at room temperature after chilling or freezing for one day resulted in more diffuse staining reactions

Nearly itinerant ferromagnetism in CaNi2 and CaNi3

Single crystals of CaNi2 and CaNi3 were successfully grown out of excess Ca. Both compounds manifest a metallic ground state with enhanced, temperature dependent magnetic susceptibility. The relatively high Stoner factors of Z = 0.79 and Z = 0.87 found for CaNi2 and CaNi3, respectively, reveal their close vicinity to ferromagnetic instabilities. The pronounced field dependence of the magnetic susceptibility of CaNi3 at low temperatures (T < 25 K) suggests strong ferromagnetic fluctuations. A corresponding contribution to the specific heat with a temperature dependence of T^3lnT was also observed.Comment: 6 pages, 7 figures, minor corrections, accepted for publication in PR

Cold Hardy Wine Grape Cultivar Trial

In conjunction with the Northeast Regional Research project NE 1020 “Multi-state Evaluation of Wine Grape Cultivars and Clones,” Iowa State University established a cold hardy wine grape cultivar trial in 2008 at the ISU Horticulture Research Station (HRS), Ames, Iowa and Tabor Home Vineyards and Winery (THV), Baldwin, Iowa. The Iowa trial evaluates the performance of Corot noir, La crescent, Marquette, Petit Ami TM , NY 95.0301-01, MN-1189, MN-1200, MN-1220, MN-1235, MN-1258 with Frontenac, and St. Croix serving as controls. This report summarizes the results for the 2011 growing season

Influence of Rootstocks and Crop Load Ratios on Gibson Golden Delicious Apple Yield and Fruit Quality

Rootstocks and crop-load management are important factors that influence the profitability of apple orchards. Rootstocks influence tree vigor, precocity, sustained productivity, fruit size, and tree stress tolerance. Crop load affects fruit maturity, size and grade, and return bloom in the subsequent year. Modern high-density systems require careful selection of rootstocks and management of crop-loads to optimize yield and ensure a return crop for following seasons. This report summarizes the yield and fruit quality of Gibson Golden Delicious apple grown on a combination of different rootstocks and cropping levels during 2010

Influence of Crop Load on Tree Growth, Yield, and Fruit Quality of Scab Resistant Apples at Harvest

Apple scab, caused by Venturia inaequalis, is a major disease affecting apple production. Breeding programs have developed over 30 releases of scab-resistant cultivars since 1970 with recent ones having much improved quality. Redfree and GoldRush are from a cooperative breeding program involving Purdue, Rutgers, and Illinois universities while Liberty was introduced from the Cornell University breeding program. For these cultivars to gain better acceptance, more information is needed on their cropping capacities and the effect of crop load on fruit quality attributes. Our study was conducted to determine the relationship between increasing crop load on tree growth, fruit size, and fruit quality variables of the three cultivars under Iowa conditions

Probing the Deep End of the Milky Way with New Oscillating Kepler Giants

The Kepler mission has been a success in both exoplanet search and stellar physics studies. Red giants have actually been quite a highlight in the Kepler scene. The Kepler long and almost continuous four-year observations allowed us to detect oscillations in more than 15,000 red giants targeted by the mission. However by looking at the power spectra of 45,000 stars classified as dwarfs according to the Q1-16 Kepler star properties catalog, we detected red-giant like oscillations in 850 stars. Even though this is a small addition to the known red-giant sample, these misclassified stars represent a goldmine for galactic archeology studies. Indeed they happen to be fainter (down to Kp~16) and more distant (d>10kpc) than the known red giants, opening the possibility to probe unknown regions of our Galaxy. The faintness of these red giants with detected oscillations is very promising for detecting acoustic modes in red giants observed with K2 and TESS. In this talk, I will present this new sample of red giants with their revised stellar parameters derived from asteroseismology. Then I will discuss about the distribution of their masses, distances, and evolutionary states compared to the previously known sample of red giants.Comment: 5 pages, 4 figures, Proceedings of the KASC9-TASC2 meetin

Spin alignment of stars in old open clusters

Stellar clusters form by gravitational collapse of turbulent molecular clouds, with up to several thousand stars per cluster. They are thought to be the birthplace of most stars and therefore play an important role in our understanding of star formation, a fundamental problem in astrophysics. The initial conditions of the molecular cloud establish its dynamical history until the stellar cluster is born. However, the evolution of the cloud's angular momentum during cluster formation is not well understood. Current observations have suggested that turbulence scrambles the angular momentum of the cluster-forming cloud, preventing spin alignment amongst stars within a cluster. Here we use asteroseismology to measure the inclination angles of spin axes in 48 stars from the two old open clusters NGC~6791 and NGC~6819. The stars within each cluster show strong alignment. Three-dimensional hydrodynamical simulations of proto-cluster formation show that at least 50 % of the initial proto-cluster kinetic energy has to be rotational in order to obtain strong stellar-spin alignment within a cluster. Our result indicates that the global angular momentum of the cluster-forming clouds was efficiently transferred to each star and that its imprint has survived after several gigayears since the clusters formed.Comment: 14 pages, 3 figures, 1 table. Published in Nature Astronom