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Biomedical subjects

J Lemons

Publications and source records attributed to J Lemons.

23 records · Page 2Linked to original sources
PubMed1982

Neonatal pneumoperitoneum without significant adventitious pulmonary air: use of metrizamide to rule out perforation of the bowel.

Pneumoperitoneum in the neonate may be due to air that has dissected from the chest. Four infants, in whom pneumoperitoneum, from thoracic air dissection, occurred in the absence of pneumothorax or pneumomediastinum are reported. The absence of abnormal collections of air in the chest is of no value in deciding whether a pneumoperitoneum is due to bowel perforation or air dissecting from the chest. Contrast bowel studies are needed in all cases of pneumoperitoneum in the infant to distinguish bowel perforation from intrathoracic origin of the air.

Humans↗
PubMed1980

Bond strength of bimaterial acrylic resin combinations.

While further research is necessary on the subject of the strength and nature of the bond between different types of acrylic resins, our study shows that specimens fabricated from heat-accelerated BPM showed considerably higher transverse strength values when compared with the various bimaterial combinations. From this, and from the fact that all bimaterial combinations broke at the joining interface, it can be inferred that none of the acrylic resin bimaterial combinations developed a true "chemical bond."

Acrylic Resins↗
PubMed1980

The use of metrizamide (amipaque) to visualise the gastrointestinal tract in children: a preliminary report.

Metrizamide (amipaque) has not been used previously as a diagnostic contrast agent in the gastrointestinal tract. Metrizamide is a water-soluble isotonic contrast material having many advantages over barium and existing hypertonic water-soluble agents. There are many clinical situations in children in which metrizamide should be the contrast agent of choice for investigating the gastrointestinal tract. Four neonates are presented in whom barium or gastrografin were absolutely contraindicated. In each case metrizamide gave excellent visualization of the gastrointestinal tract. It could be followed through be bowel giving excellent visualisation even up to 120 h after ingestion. No harmful effects were noted in the four cases studied.

Barium Sulfate↗
PubMed1979

Effect of storage processes on the bacterial growth-inhibiting activity of human breast milk.

Human breast milk samples were collected from lactating mothers, and aliquots were maintained at room temperature, frozen, and pasteurized. Samples were inoculated with 10 to 50 colony-forming units per milliliter (cfu/ml) of Escherichia coli or group B streptococcus, and incubated at 37 C. Quantitative growth was measured at eight and 24 hours. No inhibitory activity was demonstrated by control broth, commercial formula, and pasteurized breast milk, which had a rapid logarithmic growth to a maximum of 10(8) to 10(9) cfu/ml at 24 hours. Compared with these controls, fresh breast milk, fresh frozen breast milk, and breast milk frozen for 21 days demonstrated a significant inhibition of bacteria growth. A trend toward gradual loss of inhibiting activity was noted with prolonged freezing of breast milk. Although freezing may quantitativly decrease the amount of some breast milk host-defense factors, it cannot be assumed that comparable functional reductions will necessarily result.

Escherichia coli↗