We consider Henriques’ homological higher convexity for complements of tropical varieties, establishing it for complements of tropical hypersurfaces and curves, and for nonarchimedean amoebas of varieties that are complete intersections over the field of complex Puiseaux series. We conjecture that the complement of a tropical variety has this higher convexity, and prove a weak form of our conje...

Humans continuously evaluate aspects of their environment (people, objects, places) in an automatic fashion (i.e., unintentionally, rapidly). Such evaluations can be highly adaptive, triggering behavioral responses away from threats and toward rewards in the environment. Even in the absence of immediate threats and fleeting rewards, the ability to automatically evaluate aspects of the environme...

Balamuthia mandrillaris is a free-living ameba that causes granulomatous amebic encephalitis in both immunocompromised and immunocompetent individuals. Because of a lack of pathognomonic symptoms and the difficulty in recognizing amebas in biopsied tissues, most cases are not diagnosed or effectively treated, leading to a >95% mortality. We report here on five cases of balamuthiasis that were d...

The enteric protozoan parasite Entamoeba histolytica causes amebic colitis through disruption of the mucus layer, followed by binding to and destruction of epithelial cells. However, it is not known whether ameba infections or ameba components can directly affect the enteric nervous system. Analysis of mucosal innervations in the mouse model of cecal amebiasis showed that axon density was dimin...

Dictyostelium discoideum cells undergo a major lifestyle change when they get hungry. They grow as unicellular amoebas, but when food starts to get short they aggregate into masses of up to a million cells, which in turn differentiate and sort out into mushroomshaped fruiting bodies. Aggregation and differentiation are rigorously controlled by a multitude of signalling pathways, which together ...

Aequorin luminescence has been utilized to determine the spatial and temporal fluctuations of the free calcium ion concentration [Ca"] in Chaos carolinensis during ameboid movement, pinocytosis, and capping. The [Ca"] increases above _10-7 M during normal ameboid movement . Three types of luminescent signals are detected in cells: continuous luminescence, spontaneous pulses, and stimulated puls...

5. Oddó BD. Infections caused by free-living amebas. Historical commentaries, taxono-my and nomenclature, protozoology and clinicopathologic features [in Spanish].tions of " Limax amoebae " and gram-negative bacteria: experimental studies and review of current problems. Are clinical isolates of Pseudomonas aeruginosa more virulent than hospital environmental isolates in amebal co-culture test? ...

The objective of this study was to determine whether the permeability characteristics of the nuclear envelope vary during different phases of cellular activity. Both passive diffusion and signal-mediated transport across the envelope were analyzed during the HeLa cell cycle, and also in dividing, confluent (growth-arrested), and differentiated 3T3-LI cultures. Colloidal gold stabilized with BSA...

By transplanting nuclei between labeled and unlabeled cells, we determined the localization of the major proteins of amebas and described certain features of their intracellular distribution . We identified -130 cellular proteins by fluorography of one-dimensional polyacrylamide electrophoretic gels and found that slightly less than half of them (designated NP, for nuclear proteins) are almost ...

Intestinal parasites cause significant morbidity and mortality. Diseases caused by Enterobius vermicularis, Giardia lamblia, Ar^cylostoma duodenale, Necator americanus, and Entamoeba histolytica occur in the United States. E. vermicularis, or pinworm, causes irritation and sleep disturbances. Diagnosis can be made using the "cellophane tape test." Treatment includes mebendazole and household sa...