Presence of human thymus lymphocyte antigen (HTLA) detected by im munofluorescence, spontaneous rosette formation with sheep erythrocytes (E rosette), rosette formation with erythrocytes sensitized with 19S antibody and complement (EAC rosette) and cell surface immunoglobulin by membrane im munofluorescence (S-Ig) were used to characterize lymphocyte subpopulations. S-Ig positive cell was absen...

We describe a novel method for rapid and quantitative evaluation of the degree of radiation-induced apoptosis in the developing brain of medaka (Oryzias latipes). Embryos at stage 28 were irradiated with 1, 2, 3.5, and 5 Gy x-ray. Living embryos were stained with a vital dye, acridine orange (AO), for 1-2 h, and whole-mount brains were examined under an epifluorescence microscope. From 7 to 10 ...

Abstract Horseweed [ Conyza canadensis (L.) Cronquist] is a facultative winter annual weed that can emerge from March to November in Michigan. Fall-emerging C. overwinters as rosette, while spring-emerging skips the rosette stage and immediately grows upright upon emergence. In Michigan, primary emergence recently shifted fall spring/summer therefore an growth type. Growth chamber experiments w...

Levamisole, an anthelminthic agent with immunostimulatory properties, does not alter in vitro macrophage-lymphocyte rosette formation between sheep alveolar macrophages and autochthonous lymphocytes.

Rosetting, the binding of parasitized erythrocytes to 2 or more uninfected erythrocytes, is an in vitro correlate of disease severity in Plasmodium falciparum malaria. Although cell ligands and receptors have been identified and a role for immunoglobulin M has been suggested, the molecular mechanisms of rosette formation are unknown. The authors demonstrate unequivocally that rosette formation ...

In a garden experiment we investigated the response to continuous removal of either flower buds or rosette buds in three perennial grassland species (Hypochaeris radicata, Succisa pratensis and Centaurea jacea), which differ in longevity and flowering type. We distinguished two possible responses: compensation for lost buds by making more buds of the same type, and switching towards development...

Field and greenhouse experiments were conducted during 2005 and 2006 at Stoneville, MS, to determine control of ragweed parthenium with several preemergence (PRE) and postemergence (POST) herbicides registered for use in corn, cotton, peanut, rice, and soybean. Norflurazon, pendimethalin, clomazone, diuron, fluometuron, pyrithiobac, dimethenamid, flumetsulam, imazaquin, s-metolachlor, metribuzi...

Adhesion of Plasmodium falciparum-infected red blood cells (iRBC) to human erythrocytes (i.e. rosetting) is associated with severe malaria. Rosetting results from interactions between a subset of variant PfEMP1 (Plasmodium falciparum erythrocyte membrane protein 1) adhesins and specific erythrocyte receptors. Interfering with such interactions is considered a promising intervention against seve...

We report ROSAT observations of two molecular clouds previously unstudied in the X-ray band, examining the possibility that X-rays can serve as tracers of star formation at distances >∼ 1 kpc. The targets are the molecular clouds associated with the Monoceros R2 reflection nebula (d = 0.8 kpc) and with the Rosette giant HII region (d = 1.5 kpc). In both cases, the PSPC images show point sources...