Publications by authors named "O E Tok"

Purpose: To evaluate the effect of subconjunctival injection of dexpanthenol on corneal neovascularization and inflammation in rats with induced chemical burns.

Methods: This experimental study included 40 female albino Wistar rats. Chemical burns were induced in the right eye of all rats on the first day, and the left eye was used as a control.

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Article Synopsis
  • The study assessed the quality and reliability of YouTube videos on exercises for temporomandibular disorders (TMD), finding that many videos did not meet high standards.
  • A significant portion of videos came from professional organizations, which had better engagement metrics compared to health information sites and independent users.
  • The professional background of the video narrators impacted video quality, with non-professionals scoring lower on quality assessments compared to healthcare professionals.
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Objective: The aim of this study was to investigate if adipose-derived stromal vascular fraction (SVF) treatment has any protective effect on ovarian function in rats with cyclophosphamide (CP) induced ovarian damage.

Design: This was an experimental animal study.

Participants/materials, Setting, Methods: 25 mature cycling Wistar-Albino rats were randomized into four groups (n = 5 per group).

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We experimentally demonstrate a new type of the intramolecular reaction between non-activated alkyne units and the dialkylboryl group (9-BBN), which was previously only hypothesized and studied on a calculational level. The reaction described here can formally be classified as a 1,2-hydroboration reaction, but, in contrast to the classical mechanism via a cyclic four-membered transition state, the reaction proceeds by a pericyclic mechanism involving a six-membered transition state. In practice, the reaction allows the synthesis of a new class of the borolenes fused with silole or dihydrosilole units.

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Calculated and measured Se nuclear magnetic resonance (NMR) chemical shift data on a diverse collection of 13 selenaborane cluster compounds, containing a total of 19 selenium centers, reveals a correlation between chemical shifts and the intracluster coordination of selenium atoms within their borane frameworks. A plot of the measured against calculated Se NMR chemical shifts shows an approximately linear relationship that can serve as a predictive tool in assessing the chemical shift range in which a selenium vertex from a particular compound might be expected to be found, thereby reducing expensive experimental time. Furthermore, the relative chemical shifts between selenium vertices in clusters containing more than one selenium atom are consistent across the range, thus allowing the assignment of the selenium resonances with a high degree of confidence even in relatively low-level density functional theory calculations.

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