background von hippel-lindau (vhl) disease is a hereditary, autosomal dominant syndrome which is manifested by a range of different benign and malignant tumors. this disease can present with different clinical presentations such as; retinal angioma (ra), hemangioblastoma (hb) of the central nervous system (cns), pheochromocytoma (pheo), and epididymal cystadenoma. tumors are usually accompanied...

we report an unusual case of a young male with cerebellar hemangioblastoma treated previously for medullary carcinoma of thyroid, whose pet/ct scans revealed a constellation of findings that suggested the rare von hippel lindau syndrome. the diagnosis was clinched by confirming the findings on whole body contrast enhanced computed tomography (cect) and contrast enhanced magnetic resonance imagi...

By the Von Neumann regular graph of R, we mean the graph that its vertices are all elements of R such that there is an edge between vertices x,y if and only if x+y is a von Neumann regular element of R, denoted by G_Vnr (R). For a commutative ring R with unity, x in R is called Von Neumann regular if there exists x in R such that a=a2 x. We denote the set of Von Neumann regular elements by V nr...

die direktreduktion von eisenerzen zu eisenschwamm mittels erdgas wird iiberall dort verwendet wo einmal die notwendtigen rohstoffe und besonders der metallurgische koks zu wirtschaftlischen bedingungen fehlen. andereseirs wiederum miissen erdgasrerven in geniigenden mengen und qualitat zu verfugung stehen, urn die direktredution mit gutem wirkungsgrad durchfuhren zu konnen. in dieser arbeit wi...

We study topological von Neumann regularity and principal von Neumann regularity of Banach algebras. Our main objective is comparing these two types of Banach algebras and some other known Banach algebras with one another. In particular, we show that the class of topologically von Neumann regular Banach algebras contains all $C^*$-algebras, group algebras of compact abelian groups and ...

Abstract Background and Aims:‎ Von Willebrand disease is a bleeding disorder caused by quantitative or functional defects in von Willebrand factor. The disease is found in up to 1 percent of the population. The most common symptom is mucocutaneous bleeding. Recently, studies conducted on healthy people showed that the H817Q mutation that previously known to cause von Willebrand...

menorrhagia is the most common symptom that is experienced by women with bleeding disorders. von willebrand disease (vwd) is the most common congenital human bleeding disorder that is manifested as a quantitative deficiency in von willebrand factor (vwf) or dysfunction of this factor. the frequency of vwd is similar in both men and women. however, vwd is more readily detected in women due to th...