Search

The counting polynomials are useful in topological description of benzenoid structures. The quasi-orthogonal cut strips could account for the helicity of nanotubes and nanotori. It also helps to describe its topological indices by virtue of quasi-orthogonal cuts of the edge strips in the polycyclic graphs. In this article, we give a complete description of the Omega and Sadhana polynomials of the nanotube TU[C.sub.4][p,q] and provide its mathematical proof. We also give explicit formulae for the PI and the theta polynomial of TU[C.sub.4][p,q] nanotubes. Key words: Omega polynomial, Sadhana polynomial, TU[C.sub.4][p,q] nanotube. Les fonctions polynomiales de comptage sont utiles pour la description topologique des structures benzenoides. Les bandes de coupes quasi-orthogonales pourraient expliquer l'helicite des nanotubes et des nanotori. Elles pourraient egalement contribuer a la description de leurs indices topologiques grace aux coupes quasi-orthogonales des bandes d'aretes de graphes polycycliques. Dans le present article, nous presentons une description complete des fonctions polynomiales Omega et de Sadhana du nanotube TU[C.sub.4][p,q] et en faisons la demonstration mathematique. Nous presentons egalement les formules explicites des fonctions polynomiales PI et theta des nanotubes TU[C.sub.4][p,q]. [Traduit par la Redaction] Mots-cles: fonction polynomiale Omega, fonction polynomiale de Sadhana, nanotube TU[C.sub.4][p,q]., Introduction One of the remarkable achievements in the field of nanotechnology is carbon nanotube (CNT) synthesis. It was discovered by Iijima in 1991 (1). Two years later, two groups independently [...]

Copyright of Canadian Journal of Chemistry is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective: To determine the justification for hysterectomies and the frequencies of histopathological lesions and complications in hystrectomised patients. Methodology: As a part of a quality assurance process at the Mercy Teaching Hospital, hysterectomies performed between 1st January, 2010 and 1st Jan 2012 were retrospectively analyzed for presenting complaints, surgical indication, histologic findings, and postoperative complications. The hysterectomy was considered justified if the preoperative diagnosis was verified by the pathology report or if significant alternate pathology was present. Results: A total of 123 hysterectomies were performed during this period. Eleven (8.9%) patients' results could not be traced. The other 91.1% had some pathology found. Histologic findings reconfirmed the clinical diagnoses. The hysterectomies were considered justified if p=0.000. Hysterectomy was performed abdominally in 88 (71.5%) patients, vaginally in 35 patients (28.4%). The most common indication for hysterectomy was fibroid related menorrhagia n=40(32.5%), followed by third degree uterovaginal prolapse n=30(24.4%), and dysfunctional uterine bleeding 29(23.6%) patients. Fever was the most common 7(5.7%) post operative complication followed by urinary tract infection 5(4.9%) The incidence of postoperative fever was greater following abdominal surgery, while urinary tract infection was greater following vaginal hysterectomy (P=0.370). Conclusion: Almost 91.1% of all hysterectomies in this study were justified. Clinical diagnoses were related to presenting complaints (p=0.000) and were confirmed by histopathogic findings (p=0.000). Most of the hysterectomies were carried out abdominally in part because fewer patients presented with prolapse. [ABSTRACT FROM AUTHOR]