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Biomedical subjects

J Frommer

Publications and source records attributed to J Frommer.

5 recordsLinked to original sources
PubMed1977

The human accessory parotid gland: its incidence, nature, and significance.

Observations on ninety-six dissections of human parotid glands have been presented, with the incidence, size, location, and histologic features of accessory parotid glands noted. Twenty-one per cent of the dissections revealed clearly detached accessory glands at variable distances from the main gland. There were no appreciable histopathologic differences between the accessory gland and the main gland in the same facial half. Aging changes, such as decreased glandular elements, increased fat, and increased fibrous connective tissue, were not more extensive in the accessory gland than in the main gland. Because of the histologic similarity, pathoses of the main gland could also involve the accessory parotid gland. Failure to remove a distantly separated accessory gland during parotidectomy could be a cause of tumor recurrence. X-ray films and sialograms were examined for visualization of accessory parotid glands and their ducts. Whereas routine diagnostic x-ray films were limited in their usefulness, sialograms provided visualization of accessory glands for diagnostic purposes.

Adult↗
PubMed1977

A mini-research program for dental students.

A mini-research program to familiarize dental students with scientific research methods is described. Students who have not been exposed to laboratory or clinical research and who are not familiar with the use of the library and other research resources participate. The gross anatomy laboratory is the setting for the data-gathering stage, although most basic science departments could conduct a similar program. The assigned topics are of a morphologic, observational, and descriptive, rather than experimental, nature. The best reports are selected for presentation at a brief scientific session patterned after meetings of the International Association for Dental Research.

Curriculum↗
PubMed1975

Quantitative morphology and carbohydrate histochemistry of the mouse submandibular gland following prepubertal castration.

The endocrinologic basis for morphological and biochemical sex differences in the mouse submandibular gland have not been clarified. Previous studies have emphasized the maintenance of glandular differences in adult animals, rather than considering the factors responsible for their developmental etiology. Male CD-1 mice were castrated at intervals between 10 and 50 days of age and killed at 100 days. The quantitative development of granular tubules and the carbohydrate histochemistry of the submandibular glands were compared to untreated males and females. The area of granular tubules increased with age at castration. Nested analysis of variance indicated significant differences among treatments and among sections within individual glands. No group of castrated males had a greater development of tubules than untreated females. Carbohydrate histochemistry demonstrated an increase in carboxylated mucosubstances in the acinar cells and granular tubule cells of castrated animals.

Age Factors↗
PubMedDate not supplied

Localization of amylase in major salivary glands of the guinea pig.

The localization of amylase activity in the major salivary glands of adult male and female guinea pigs was determined by a substrate film technique. Parotid and submandibular glands showed intense activity localized to the acini. Only a weak reaction in the lumen of intralobular ducts was observed in sublingual glands. The sex differences in amylase activity reported in other commonly studied laboratory rodents were not detected in this species.

Amylases↗