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Biomedical subjects

R Nicholson

Publications and source records attributed to R Nicholson.

At least 73 records · Page 4Linked to original sources
PubMedDate not supplied

Effects of methyl xanthines upon the spermatozoa adenosinetriphosphate (ATP) concentration in normal semen.

The aim of the present study was to ascertain the effect of methyl xanthines upon the spermatozoa ATP concentration in normal semen in vitro. 26 normal semen were studied. The specimens were diluted after liquefaction with equal volume of Lopata's buffer or Lopata's buffer plus 1 or 6 mM either of caffeine or pentoxifylline. The samples of semen were incubated at room temperature during 90, 180 and 240 minutes before motility and ATP determination by the firefly luciferin-luciferase method. Significant variation was observed in sperm motility nevertheless variations in the ATP concentration was not induced by any of the methyl xanthines we used.

Adenosine Triphosphate↗
PubMedDate not supplied

Changes in sialic acid concentration in human saliva during the menstrual cycle.

Salivary sialic acid concentration was studied daily in 20 fertile women during the menstrual cycle. The Warren method was used and plasma LH and BBT were also determined. The sialic acid concentrations in saliva throughout the cycle showed a peak 4 or 5 days before the LH preovulation surge. This maximal peak showed a mean of 10.89 +/- 1.11 mg%. This method may be useful for predicting the pre- and postovulatory fertile period.

Adolescent↗
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If pigs could fly.

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Animals↗