Tissue oxidases, especially xanthine oxidase, have been proposed as primary sources of toxic oxygen radicals in many experimental models of disease states. Among these, ischemia-reperfusion injury may be of the greatest clinical interest. In this paper we propose the use of methylene blue as a means of suppressing the production of superoxide radicals O2- by acting as an alternative electron ac...

Preoperative localization is necessary prior to video assisted thoracoscopic surgery for the detection of small or deeply located lung nodules. We compared the localization ability of a mixture of lipiodol and methylene blue (MLM) (0.6 mL, 1:5) to methylene blue (0.5 mL) in rabbit lungs. CT-guided percutaneous injections were performed in 21 subjects with MLM and methylene blue. We measured the...

A new and simple method has been developed for the preparation of -methylene cyclopentenones and presently provides the most convenient route to sarkomycin. The work has, in addition, led to a better understanding of the vinylogous Dieckmann condensation, the course of Michael addition to -methylene cyclopentenones and the behavior of cyclopentenoid endocyclic and exocyclic dienolates towards e...

The cytotoxic chloroform fraction of Euphorbia aellenii afforded two cycloartane type triterpenes — cycloart-25-en-3,24-diol (1) and 24-methylene-cycloartan-3-ol (2) — for the first time from this plant. Preparation of cycloartane derivatives, 3, 24-O-diacetyl-cycloart-25-en as compound 3 and 3-O-acetyl-24-methylene-cycloartan (4) were conducted by acetylating of 1 and 2, respectively. The ...

4-Amino-6-methyl- 1,2,4-triazine-3(2H)-thione-5-0ne (1) was condensed with propargyl bromidein the presence of sodium rnethoxide to afford 3-propargylmercapto- 4-arnino-6-rnethyl-1,2,4-triazin-5-one(2) . Transformation of the latter to 8-dihydro- 3-methyl-7-methylene-4-oxo-6H-[1,2,4]TRIAZINO [3,4-b] [1,3,4] thiadiazine (3) was performed under the condition of palladium (II) salt. Ring closu...

The dilemma of diagnosing and possibly treating dentinal cracks continues to present a challenge in endodontics. The purpose of this in vitro study was to compare the effectiveness of transillumination and dyes in identifying root-end dentinal cracks. Fifty maxillary central incisors were decoronated, and the canals were instrumented to an ISO size 50 at the working length. The apical 3 mm of t...

Purpose To investigate the degree of arterial blood supply of portal vein tumor thrombus (PVTT) in patients with hepatocellular carcinoma (HCC), and to evaluate its impact on overall survival after transarterial chemoembolization using lipiodol +/- gelatin sponge particles (TACE). Results Of the 10 patients who underwent surgery, the number of patients with good/mild/poor staining of PVTT by ...

Current antimicrobial drug discovery and advancement attempts are aimed to identify new complexes that can work effectively against the infections caused by microbes. The aim of present study was synthesize diorganotin(IV) N'-((8-hydroxy-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinolin-9-yl)methylene)-2-nitrobenzohydrazide (H2L1), N'-((8-hydroxy-1,2,3,5,6,7-hexahydropyrido[3,2,1-ij]quinolin-9-yl)m...