The effect of carbon contamination on the analysis of carbon-coated silicate minerals at 5 kV for X-ray energies 0.7-4 keV is examined. For individual spot analyses, carbon is found to deposit adjacent to the beam spot forming ring-shaped deposits with no impact on the analysis. Carbon contamination becomes important for closely spaced analyses such as multipoint transects, where each subsequen...

Sunflower plants showing chlorotic ring spot symptoms were observed during the 2005/2006 crop season in the southeast of the Province of Buenos Aires in Argentina. Preliminary studies, including host range symptoms, serological tests and electron microscopy, had identified this virus isolate as a potyvirus closely related to Sunflower chlorotic mottle virus (SuCMoV). The nucleotide sequence of ...

One hallmark of cancer cells is their adaptation to rely upon an altered metabolic scheme that includes changes in the glycolytic pathway, known as the Warburg effect, and elevated glutamine metabolism. Glutaminase, a mitochondrial enzyme, plays a key role in the metabolism of glutamine in cancer cells, and its inhibition could significantly impact malignant transformation. The small molecule 9...

The aim of this study was to evaluate the occurrence of peony ring spot disease in the collections of foreign and Lithuanian origin peony cultivars and hybrids and to identify a causal agent of this viral disease. During surveys of ornamental plant collections grown in Lithuania, solitary instances of affected by peony ring spot disease plants have been detected in all collections surveyed. Dis...

PURPOSE The purpose of this study was to evaluate the physiological uptake pattern of (18)F-FDG in the left ventricular myocardium of patients under preparation for tumor FDG-PET. PATIENTS AND METHODS We enrolled 188 patients without cardiac disease. The accumulation patterns were classified as either 'none', 'diffuse', 'focal' or 'focal on diffuse'. When a focal uptake was only observed on t...

in this paper, we introduce the new notion of n-f-clean rings as a generalization of f-clean rings. next, we investigate some properties of such rings. we prove that mn(r) is n-f-clean for any n-f-clean ring r. we also, get a condition under which the denitions of n-cleanness and n-f-cleanness are equivalent.

a topoframe, denoted by $l_{ tau}$,  is a pair $(l, tau)$ consisting of a frame $l$ and a subframe $ tau $ all of whose elements are complementary elements in$l$. in this paper, we define and study the notions of a$tau $-real-continuous function on a frame $l$ and the set of realcontinuous functions $mathcal{r}l_tau $ as an $f$-ring.we show that $mathcal{r}l_{ tau}$is actually a generalization ...

for a fixed positive integer , we say a ring with identity is n-generalized right principally quasi-baer, if for any principal right ideal of , the right annihilator of is generated by an idempotent. this class of rings includes the right principally quasi-baer rings and hence all prime rings. a certain n-generalized principally quasi-baer subring of the matrix ring are studied, and connections...

PURPOSE To calculate a beam-shaping optical element for homogeneous intensity distribution within a focal ring to be used in nonmechanical trephination with the Er:YAG laser in penetrating keratoplasty instead of a spot guiding device. METHODS The phase distribution behind a holographic optical element (HOE) k psi(u) can be described by the addition of the hologram phase phiH(u) to the beam p...