I n this issue of the Journal, Casciola-Rosen et al. (1) call . attention to a topic that has been of recent interest, the possible association of apoptosis with autoimmunity. Apoptosis, sometimes called programmed cell death, was described by Kerr et al. (2)and Wyllie et al. (3) as a form of cell death characterized by cell shrinkage, nuclear condensation, and surface blebbing not accompanied ...

Chagas’ disease, or American trypanosomiasis, whose etiological agent is the protozoan parasite Trypanosoma cruzi, is an important public health concern in Latin America. At least 8 million people acquired the infection via the arthropod vector or another mechanism of transmission, such as blood transfusion or vertical transmission from mother to child (9). In Chile (11), the parasitose is ende...

Transportation networks can be a major impediment to wildlife movements. We assessed the use of underpasses and culverts along newly constructed railway in Kenya's Tsavo National Parks by African elephants (L. africana). collared ten with GPS satellite transmitters within 20 km March 2016 analysed their movement data 2019. Eight used although one did not cross adjacent highway. The remaining tw...

X-ray absorption spectroscopic studies of cation environments in oxide glasses are selectively reviewed. New results are presented on K and Yb environments in silicate glasses and on Fe in silicate melts at temperatures up to 1173 " K. INTRODUCTION Recent investigations of oxide glasses and crystalline model compounds by x-ray absorption spectroscopy (XAS and the acronyms EXAFS for extended fin...

This paper seeks to model determining factors in international migration from 1999-2006. By accounting for relevant variables, the paper aims to elicit the effect of several non-economic factors and their impact on an individual’s decision to relocate. After replicating past literature to legitimize my newly constructed dataset, I add a number of qualitative features, such as a common spoken la...

Let f : A → B be a ring homomorphism of not necessarily unital rings and I ⊳ A an ideal which is mapped by f isomorphically to an ideal of B. The obstruction to excision in K-theory is the failure of the map between relative K-groups K∗(A : I) → K∗(B : f(I)) to be an isomorphism; it is measured by the birelative groups K∗(A,B : I). Similarly the groups HN∗(A,B : I) measure the obstruction to ex...

The integral of the kernel of the trace formula against an Eisenstein series is investigated. The analytic properties of this integral imply the divisibility of the convolution L-function attached to a form by the zeta function of the field. Introduction. This paper is a sequel and generalization of [12], but can be read independently of that paper; in particular, we will repeat the description...