Yasuyuki Sasaki

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We screened actinomycete strains for dinitrogen (N(2))-producing activity and discovered that Streptomyces antibioticus B-546 evolves N(2) and some nitrous oxide (N(2)O) from nitrate (NO(3)(-)). Most of the N(2) that evolved from the heavy isotope ([(15)N]NO(3)(-)) was (15)N(14)N, indicating that this nitrogen species consists of two atoms, one arising from(More)
BACKGROUND AND AIM OF THE STUDY The influence of prosthesis-patient mismatch on long-term results after aortic valve replacement remains controversial. The aim of this study was to evaluate the effect of prosthesis-patient mismatch on survival and the extent of left ventricular mass regression after aortic valve replacement for aortic stenosis. METHODS We(More)
PURPOSE Poststernotomy mediastinitis (PSM) following cardiovascular surgery remains an intractable complication associated with considerable mortality. It is therefore necessary to assess the risk factors associated with hospital mortality and evaluate the surgical treatment options for PSM. METHODS We identified 59 (2.2%) patients who developed PSM after(More)
A 69-year–old man was referred to our department for surgical treatment of bilateral giant coronary artery aneurysms. He had no apparent clinical factors associated with atherosclerosis, such as diabetes mellitus, hyperlipidemia, or hypertension. Physical examination revealed no abnormalities. His medical history included malignant lymphoma that had been(More)
BACKGROUND AND AIM OF THE STUDY The timing of the surgical intervention for active infective endocarditis (IE) is particularly difficult when there is a cerebrovascular complication. The study aim was to investigate the results of surgical treatment for active IE in patients with recent cerebrovascular events, and to evaluate the relationship between the(More)
The goal of this prospective study was to examine the effects of landiolol hydrochloride on prevention of atrial fibrillation and on hemodynamics in the acute postoperative phase after heart valve surgery. The subjects were 60 patients who underwent valve surgery at our hospital from April 2008 to July 2010. The patients were randomly divided into two(More)
We report a case of advanced follicular thyroid carcinoma with massive involvement of the great veins of the cervix and mediastinum, and extensive tumor thrombus growing intraluminally into the superior vena cava. The patient, a 70-year-old Japanese woman, was treated successfully by a cooperative surgical team of endocrine and cardiovascular surgeons.(More)
The antifungal activity of alkyl gallates against plant pathogenic fungi was evaluated. All of the fungi tested in this study were susceptible to some alkyl gallates, and the effect of linear alkyl gallates against plant pathogenic fungi was similar to the previously reported effects against Gram-negative and Gram-positive bacteria. We found that branched(More)
A flavocytochrome protein was isolated from the actinomycete Streptomyces antibioticus. The purified protein contained protoheme and FAD, and its M(r) was estimated to be 52000. The absorption spectra in its resting oxidized, dithionite-reduced, carbon monoxide-bound, and oxygenated (O(2)-bound) forms were characteristic of those of flavohemoglobin (Fhb).(More)
Platypnea-orthodeoxia is a rare syndrome presenting with dyspnea and cyanosis induced by an upright position and relieved by recumbency. We report a patient with an excessively enlarged aortic root who had critical hypoxia due to a paradoxical shunt through the patent foramen ovale only when seated. The postural changes of the shunt, caused by changes in(More)