The aim of this article is to sketch a certain method of indirect reconstruction of the process by which mathematics as a deductive discipline emerged in ancient Greece. We try out this method in a reconstruction of Thales' mathematics, but the main aim for which this method has been developed is the work of Pythagoras. We consider the process of the emergence of mathematics as a process of the constitution of a new language in the framework of which one can carry out deductive proofs. Therefore we base the method of indirect reconstruction of the emergence of mathematics on the theoretical findings in the book L. Kvasz: Vedecká revolúcia ako lingvistická událosť (The Scientific Revolution as a linguistic event, Prague, Filosofia 2013)., Ladislav Kvasz., and Obsahuje poznámky a bibliografii
Studie se zabývá částečným objevem hudebního rukopisu Thannenwald z polského přístavního města Elblag nedaleko Gdaňsku, který vznikl kolem roku 1600., Agnieszka Leszczyńska., Rubrika: Studie, and České resumé na s. 114, anglický abstrakt na s. 105
Královská kanonie premonstrátů na Strahově - Strahovská knihovna Praha CZ BU II 113 adl. 22, Knihovna Akademie věd ČR Praha CZ TF 347 adl. 21, Národní knihovna ČR Praha CZ 65 E 3062, Národní knihovna ČR Praha CZ 46 B 183 adl. 2, Národní knihovna ČR Praha CZ 46 F 74 adl. 26, Klášter Rytířského řádu křižovníků s červenou hvězdou - knihovna Praha CZ XVI H 8 adl. 8, Klášter Rytířského řádu křižovníků s červenou hvězdou - knihovna Praha CZ XVIII K 4 adl. 14, Metropolitní kapitula u sv. Víta v Praze Praha CZ I. b. 41 adl. 3, Metropolitní kapitula u sv. Víta v Praze Praha CZ C. d. beta 45 adl. 32, and BCBT40371
The aim of this study was to evaluate the influence of exercise with the intensity progressively increasing from rest until maximal oxygen uptake (VCbmax) on 2,3-DPG levels in red blood cells (RBC) in relation to the changes in the acid-base balance and plasma lactate concentration. Six healthy young men (age 22.5 ±1.5 years, V02max 3.48 ±0.20 1/min) participated in this study. The subjects performed an incremental exercise test on a cycloergometer until exhaustion. Blood samples were tested for acid-base balance indices (pH, HCO3-, BE), plasma lactate and RBC 2,3-DPG concentration. Gas exchange variables were measured continuously breath-bybreath. In this paper we present data concerning 2,3-DPG, plasma lactate, pH, HCO3" and BE measured at rest, at the power output corresponding to the lactate threshold (PO LT), at the power output at maximal oxygen uptake (PO VCbmax), as well as 5, 15 and 30 min after finishing the incremental test. Increase of power output above the lactate threshold to the PO V02max was accompanied by a significant (p<0.01) increase of plasma lactate from 2.58±0.78 mmol/1 to 10.22±3.04 mmol/1. This was also accompanied by a significant drop (p<0.01) in blood pH value from 7.352 ± 0.025 at the PO LT to 7.294 ±0.041 at the PO V02max- No significant changes of the RBC
2,3-DPG level were observed at any of the analysed stages of the exercise. The RBC 2,3-DPG level expressed in relation to the changes of haematocrit showed only minor changes during the exercise period and after 15 min of recovery vs. resting value (3.21 ±1.19). However, after 30 min of recovery, RBC 2,3-DPG decreased to the value of 2.32±1.19 /rmol/ml. We conclude that, during an incremental test, no increase in RBC 2,3-DPG concentration is required to reach the maximal oxygen uptake level. Moreover, a rapid decrease in blood pH, developing during a single bout of exercise, is not a stimulus powerful enough to cause significant changes in the RBC 2,3-DPG level during short-term exercise.