Recently we found that (pentafluorophenyl)xenon(II) hexafluoroarsenate [CöF5Xe]+ [AsFö]reacted easily with xenon difluoride and FLO in HF to yield (pentafluoro-l,4-cyclohexadien-3-onl-yl)xenon(II) hexafluoroarsenate [1], In order to prove the scope of the synthetic use of this new powerful oxygenating reagent, the interaction with pentafluorobenzene derivatives C6F5X containing electron-donor a...

nozzle and sediment determ ines the rate of scour . Under fully turbulent conditions, the re la~ive dimensions of the sccur hole d (:pend onl y upon the t ime pa rame ter and the ratio between the fictitious axial jer velocity a t the bed and the fa ll ve locity of the sediment particles. There exist two distinct values of this ratio, at which the eroding action of the jet becomes particularly ...

numerous readers would give me some information as to the name, causation and treatment of the bilateral and permanent pigmentation that appears on the skm of the cheeks and the bridge of the nose of inan> people, both men and women. In some people it is s<? indistinct that it requires careful observation to detec but others are so deeply pigmented that it can noticed from a distance. The pigme...

The COVID-19 pandemic caused extensive disruption to higher education, highlighting the negative impacts of emergency shift online instruction. As a result, advantages intentionally designed, programs in education were overshadowed during pandemic. Furthermore, socioeconomic disparities exacerbated which extended STEM undergraduate transfer students, who are more likely be low-income, from hist...

Spectral domain optical coherence tomography (SD-OCT) has become an established diagnostic tool for the clinical assessment of retinal pathology and its progression, in OPD setting. The aim of our study was to do in vitro quantification of relevant retinal layers to collect baseline data at different age groups, against which OCT findings can be interpreted. Thirty eyeballs (20-99 years) were u...

PURPOSE BCL-X(L), an anti-apoptotic member of the BCL-2 family proteins and a cell death/survival checkpoint regulator, was shown to be upregulated in bright light-stressed mouse photoreceptors during an investigation of bright light-induced protein expression. To investigate the significance of BCL-X(L) upregulation in the bright light damage model, the Bcl-x gene was disrupted specifically in...

PURPOSE To characterize the nature and extent of neuronal reorganization in the human retina during normal aging. METHODS Retinas of young (18-34 years old) and aged (68-77 years old) human donors were examined. Immunocytochemical methods and antibodies directed against Go-alpha, protein kinase C, parvalbumin, calbindin, calretinin, and choline acetyltransferase were used to stain different r...

A homozygous mutation in STK38L in dogs impairs the late phase of photoreceptor development, and is followed by photoreceptor cell death (TUNEL) and proliferation (PCNA, PHH3) events that occur independently in different cells between 7-14 weeks of age. During this period, the outer nuclear layer (ONL) cell number is unchanged. The dividing cells are of photoreceptor origin, have rod opsin labe...