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B Prochazka

Publications and source records attributed to B Prochazka.

7 recordsLinked to original sources
PubMed1995

Vibratory perception threshold in the lower extremities. Normative values.

Objective was to obtain normative values for the vibratory perception threshold (VPT) in the lower extremities and study the dependence of VPT on various physiological factors. Thirty healthy volunteers: 10 men and 20 women entered in the study. The VPT for 8, 16, 31.5, 63, 125, and 500 Hz were estimated on the right and left external malleolus using the B&K vibration threshold meter, modified type 1800, and the threshold tracking method. The applied static force could not be controlled. The measurements were repeated twice. VPTs expressed as mean +/- SD were as follows: 8 Hz 109 +/- 3.4 dB, 16 Hz 112 +/- 4.1 dB, 31.5 Hz 116 +/- 6.2 dB, 63 Hz 116 +/- 8.4 dB, 125 Hz 117 +/- 8 dB, 250 Hz 125 +/- 9.3 dB, and 500 Hz 136 +/- 13.1 dB. A nomogram was constructed with reference ranges of VPTs for individual frequencies, from which the profile of vibratory perception thresholds can be seen. Moreover, a global index was calculated as a sum of VPTs for individual frequencies. Its reference value was 840 +/- 52 dB and it varied in repeated measurements by up to 9%. No statistically significant difference of VPTs between the right and left side and between the 1st and 2nd examination was found. A tendency to the increase of VPTs with age was observed, which in males reached statistical significance for frequencies 16, 31.5, 63, and 125 Hz.

Adolescent↗
PubMed1975

Source of the pregnancy serum N-acetyl-beta-glucosaminidase isoenzyme during human pregnancy.

The antisera to the A and B isoenzymes found in placenta and fetal liver were raised in rabbits. No antigenic difference was found between the fetal liver and adult tissue isoenzymes. Antisera to the placental isoenzymes did not react with the isoenzymes of adult tissues. The antibody raised against the placental B and fetal B liver isoenzyme decreased the N-acetyl-beta-glucosaminidase activity in maternal serum at 38 weeks gestation to the value found in normal human serum. Immunological evidence has been presented that the isoenzyme of N-acetyl-beta-glucosaminidase found only in pregnancy serum was of placental origin.

Acetylglucosaminidase↗
PubMed1975

The serum activity of glucose-6phosphatase and 5'-nucleotidase during human pregnancy.

An attempt has been made to show that the increase in enzyme activities in sera of pregnant women found with glucose-6-phosphate and adenosine 5'-monophosphate as substrates (described as glucose-6-phosphatase and 5'-nucleotidase) was due to the increase in alkaline phosphatase. The three enzyme activities has pH optima and heat stability characteristics of alkaline phosphatase. The response to the action of inhibitors and activators was typical for alkaline phosphatase. There was an identical increase in all three enzyme activities during pregnancy. As a control similar investigations were made with liver and placental tissue extracts.

Adenosine Monophosphate↗