We give a necessary and sufficient condition for the existence of a positive principal eigenvalue for a periodic-parabolic problem with indefinite weight function.The condition was Women’s shirt originally established by Beltramo and Hess [extit{frenchspacing Comm.Part.Diff.Eq.}, extbf{9} (1984), 919--941] in the framework of the Schauder theory

Mucociliary clearance is one of the major lines of defense of the human respiratory system.The mucus layer coating the airways is constantly moved along and out of the lung by the activity of motile cilia, expelling at the same time particles trapped in it.The efficiency of the cilia motion can experimentally be assessed by measuring the velocity o

Summary: The habenula is an evolutionarily highly conserved diencephalic brain region divided into two major parts, medial and lateral.Over the past two decades, studies of the lateral habenula (LHb), in particular, have identified key functions in value-guided behavior in health and disease.In this review, we focus on recent insights into LHb conn

Improper depositions of organic waste threaten the environment.On the other hand, intensive soil cultivation, inappropriate utilization of inorganic fertilizers, and inadequate soil management practices in the Hub Assembly study area resulted in soil fertility reduction and poor crop growth.The addition of organic fertilizers from organic waste (bi

Using a principal components analysis of morphological data of 1,759 specimens, we detected that the Bothrops neuwiedi complex (with 12 subspecies) is, actually, comprised of 7 full species, differing mainly by qualitative characteristics.One species was nominal.Five subspecies were elevated to the species level.Bothrops iglesiasi and the remaining