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Biomedical subjects

H Masaki

Publications and source records attributed to H Masaki.

At least 307 records · Page 17Linked to original sources
PubMed1983

Gas-liquid chromatographic determination of trace amounts of nitrite in egg, egg white, and egg yolk.

A simple, sensitive, and practical method is described for determination of nitrite in egg, egg white, and egg yolk. Egg is deproteinized by adding a mixture of ammonium thiocyanate, mercuric chloride, and zinc acetate, and centrifuged. Nitrite in the supernate is converted to tetrazolophthalazine by reaction with hydralazine in acidic solution and then determined by gas-liquid chromatography with an electron-capture detector (GLC-ECD) and a column of OV-225 on Chromosorb W(HP). Nitrite concentrations from 5 to 50 ng/mL are calculated from peak height; the detection limit is 3 ng/mL extract. Recoveries from eggs, egg whites, and egg yolks ranged from 91.7 to 98.0%. The mean nitrite concentration in 50 egg samples was 0.04 ppm (0.01-0.11 ppm) with a detection limit of 4 ng nitrite/g.

Animals↗
PubMed1982

Ga-67 scan in patients with intrathoracic esophageal carcinoma planned for surgery.

The authors evaluated Ga-67 scan in 68 patients with intrathoracic esophageal carcinoma initially planned for surgery. Of these, 59 patients were staged pathologically or surgically; their Ga-67 scan results correctly predicted the presence of extraesophageal spread and lymph node metastases. Of 38 clinical Stage II patients, 15 (39%) could be Stage III by the results of Ga-67 scan. However, two of four clinical Stage I patients (50%) and 35 of 38 clinical Stage II patients (92%) were eventually pathologic or surgical Stage III. This high conversion rate and the high incidence of Stage III in esophageal carcinoma patients may not justify routine use of Ga-67 scan only for staging. Ga-67 scan, however, was useful for planning radiotherapy, because missing extraesophageal extension or gross metastases from the radiation fields were detected in six patients of 51 so treated. Ga-67 scan has its value in some patients with intrathoracic esophageal carcinoma.

Esophageal Neoplasms↗
PubMed1982

Direct communication of the right pulmonary artery with the left atrium in an infant.

An 8-month-old Japanese girl with cyanosis and evidence of a round shadow connected with the right cardiac border on the chest X-ray film was diagnosed as a case of direct communication of the right pulmonary artery with the left atrium (RPA-LA communication) following cardiac catheterization and angiocardiography. She had a history of transient congestive heart failure in the early neonatal period. A secundum atrial septal defect and a two-lobed right lung were also present. The patient became asymptomatic after a successful ligation of the anomalous connecting vessel.

Adolescent↗