26 research outputs found
Microstructure analysis of titanium oxynitride films deposited by reactive magnetron sputtering
This paper presents the structure analysis results of TiOxNy films, deposited using reactive magnetron sputtering with different O2/N2 flow ratio. The impact of increase of N2 flow upon the films structure has been studied. The analysis was carried out by X-ray diffraction method. The lattice parameters and phase composition were calculated using PowderCell 2.4
Bistability and oscillations of the NO/CO reaction on a Pt-Mo supported catalyst
The reaction of NO with CO on a catalyst of 0.5% Pt-3.4% MoO3 supported on a-Al2O3 was studied in different reactors at atm. pressure. A fixed-bed reactor with external recycle loop exhibited bistability and hysteresis as CO concn. or temp. were varied. In a tubular fixed-bed reactor non-isothermal periodic oscillations (DTmax = 40 K) were found in a specific pressure-concn.-temp. region (p-c-T region). The amplitude and period time of the oscillations changed smoothly inside the p-c-T region and died out suddenly at the borders of the region. The oscillations were of a relaxation type and lasted for more than 48 h. With fresh catalyst, a new quartz reactor and a specific pretreatment they were reproducible. It was shown that oscillations had kinetic origins and that the changes of the temp. synchronized the elementary oscillators. An autocatalytic model is proposed to explain the exptl. obsd. phenomena. [on SciFinder (R)
ΠΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΏΠΈΡΠ°Π½ΠΈΡ Π΄Π»Ρ ΡΠ²Π°ΡΠΊΠΈ ΠΌΠ°Π³ΠΈΡΡΡΠ°Π»ΡΠ½ΡΡ ΡΡΡΠ±ΠΎΠΏΡΠΎΠ²ΠΎΠ΄ΠΎΠ²
ΠΡΠ» ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ Π°Π½Π°Π»ΠΈΠ· Π½Π°ΠΏΡΡΠΆΠ΅Π½Π½ΠΎ-Π΄Π΅ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΡΠΎΡΡΠΎΡΠ½ΠΈΠΉ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΌΠ°Π³ΠΈΡΡΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΡΡΠ±ΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π°, ΡΠΎ ΡΠ²Π°ΡΠ½ΡΠΌ ΡΠ²ΠΎΠΌ Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π½ΡΠΌ Ρ ΡΠ°Π·Π΄Π΅Π»ΠΊΠΎΠΉ ΠΊΡΠΎΠΌΠΎΠΊ ΠΏΠΎΠ΄ ΡΠ΅ΡΡΡΠ΄Π΅ΡΡΡ Π³ΡΠ°Π΄ΡΡΠΎΠ² ΡΠ²Π°ΡΠΊΠΎΠΉ Π² Π‘Π2 ΠΈ ΡΠΎ ΡΠ²Π°ΡΠ½ΡΠΌ ΡΠ²ΠΎΠΌ Π²ΡΠΏΠΎΠ»Π½Π΅Π½Π½ΡΠΌ ΡΠ²Π°ΡΠΊΠΎΠΉ Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠ³ΠΎ ΠΏΠΈΡΠ°Π½ΠΈΡ Π² ΡΡΠ΅Π΄Π΅ Π‘Π2 ΡΠΎ ΡΠ΅Π»Π΅Π²ΠΎΠΉ ΡΠ°Π·Π΄Π΅Π»ΠΊΠΎΠΉ ΠΊΡΠΎΠΌΠΎΠΊ. Π’Π°ΠΊ ΠΆΠ΅ Π±ΡΠ»ΠΈ ΡΠ°ΡΡΡΠΈΡΠ°Π½Ρ Π½Π΅ΠΊΠΎΡΠΎΡΡΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ ΡΠΎΠ·Π΄Π°Π½ΠΈΡ ΡΠ²Π°ΡΠ½ΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ.An analysis was made of the stress-strain states of models of the main pipeline, with a welded seam made with cutting edges at sixty degrees by welding in CO2 and with a welded weld made using pulsed power in a CO2 medium with slotted cutting edges. Also, some parameters for creating welded joints were calculated
Relations between microelement composition of bed load sediments and sedimentation in delta of the Mekong river (Vietnam)
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΡΠ°Π±ΠΎΡΡ. ΠΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΌΠ΅Ρ
Π°Π½ΠΈΠ·ΠΌΠΎΠ² ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΈΡΠΎΠ΄Π½ΡΡ
ΠΈ ΠΏΡΠΈΡΠΎΠ΄Π½ΠΎ-Π°Π½ΡΡΠΎΠΏΠΎΠ³Π΅Π½Π½ΡΡ
Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
Π°Π½ΠΎΠΌΠ°Π»ΠΈΠΉ Π² Π²ΠΎΠ΄Π½ΡΡ
ΠΎΠ±ΡΠ΅ΠΊΡΠ°Ρ
ΠΈΠ³ΡΠ°Π΅Ρ ΠΈΡΠΊΠ»ΡΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π²Π°ΠΆΠ½ΡΡ ΡΠΎΠ»Ρ Π² Π³Π΅ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΈ Π³Π΅ΠΎΡΠΊΠΎΠ»ΠΎΠ³ΠΈΠΈ, ΡΠ²Π»ΡΠ΅ΡΡΡ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΡΠΌ ΡΡΠ°ΠΏΠΎΠΌ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ Π΄ΠΎΠ»Π³ΠΎΡΡΠΎΡΠ½ΡΡ
ΠΏΡΠΎΠ³Π½ΠΎΠ·ΠΎΠ² ΡΠΎΡΡΠΎΡΠ½ΠΈΡ Π²ΠΎΠ΄Π½ΡΡ
ΠΈ Π½Π°Π·Π΅ΠΌΠ½ΡΡ
ΡΠΊΠΎΡΠΈΡΡΠ΅ΠΌ ΠΈ ΠΏΠ»Π°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΈΡΠΎΠ΄ΠΎΠΎΡ
ΡΠ°Π½Π½ΡΡ
ΠΌΠ΅ΡΠΎΠΏΡΠΈΡΡΠΈΠΉ. ΠΠ° ΠΏΡΠΈΠΌΠ΅ΡΠ΅ ΠΠ΅ΠΊΠΎΠ½Π³Π° - ΠΊΡΡΠΏΠ½Π΅ΠΉΡΠ΅ΠΉ ΡΠ΅ΠΊΠΈ ΠΠ½Π΄ΠΎΠΊΠΈΡΠ°Ρ - ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½ ΠΎΠ΄ΠΈΠ½ ΠΈΠ· ΠΊΠ»ΡΡΠ΅Π²ΡΡ
Π°ΡΠΏΠ΅ΠΊΡΠΎΠ² ΡΡΠΎΠΉ ΠΏΡΠΎΠ±Π»Π΅ΠΌΡ - Π²ΡΡΠ²Π»Π΅Π½ΠΈΠ΅ ΡΠ²ΡΠ·Π΅ΠΉ ΠΌΠ΅ΠΆΠ΄Ρ Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΈ Π³ΠΈΠ΄ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΏΡΠΎΡΠ΅ΡΡΠ°ΠΌΠΈ Π² Π΄Π΅Π»ΡΡΠ΅ Π±ΠΎΠ»ΡΡΠΎΠΉ ΡΠ΅ΠΊΠΈ. ΠΡΠ±ΠΎΡ ΠΎΠ±ΡΠ΅ΠΊΡΠ° ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½ Π·Π½Π°ΡΠ΅Π½ΠΈΠ΅ΠΌ ΡΠ΅ΠΊΠΈ Π² ΡΠΎΡΠΈΠ°Π»ΡΠ½ΠΎ-ΡΠΊΠΎΠ½ΠΎΠΌΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ°Π·Π²ΠΈΡΠΈΠΈ ΡΠ³ΠΎ-Π²ΠΎΡΡΠΎΡΠ½ΠΎΠΉ ΠΠ·ΠΈΠΈ. Π¦Π΅Π»Ρ ΡΠ°Π±ΠΎΡΡ: Π²ΡΡΠ²Π»Π΅Π½ΠΈΠ΅ ΡΠ²ΡΠ·Π΅ΠΉ ΠΌΠ΅ΠΆΠ΄Ρ ΠΏΡΠΎΡΠ΅ΡΡΠ°ΠΌΠΈ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ Π² Π΄Π΅Π»ΡΡΠ΅ ΡΠ΅ΠΊΠΈ ΠΠ΅ΠΊΠΎΠ½Π³ (ΠΡΠ΅ΡΠ½Π°ΠΌ) ΠΈ ΠΈΡ
ΠΌΠΈΠΊΡΠΎΡΠ»Π΅ΠΌΠ΅Π½ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π°. ΠΠ΅ΡΠΎΠ΄Ρ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ: Π»Π°Π½Π΄ΡΠ°ΡΡΠ½ΠΎ-Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΈ Π³Π΅ΠΎΠ³ΡΠ°ΡΠΎ-Π³ΠΈΠ΄ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΌΠ΅ΡΠΎΠ΄Ρ, ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π³ΠΈΠ΄ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ². Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈ Π²ΡΠ²ΠΎΠ΄Ρ. ΠΠΎΠ»ΡΡΠ΅Π½Ρ Π΄Π°Π½Π½ΡΠ΅ ΠΎ ΠΌΠΈΠΊΡΠΎΠΎΡΠ»Π΅ΠΌΠ΅Π½ΡΠ½ΠΎΠΌ ΡΠΎΡΡΠ°Π²Π΅ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ Π² Π΄Π΅Π»ΡΡΠ΅ ΡΠ΅ΠΊΠΈ ΠΠ΅ΠΊΠΎΠ½Π³. ΠΡΠΏΠΎΠ»Π½Π΅Π½Π° ΠΎΡΠ΅Π½ΠΊΠ° Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΉ ΡΡΡΠ»Π° ΡΠ΅ΠΊΠΈ ΠΠ΅ΠΊΠΎΠ½Π³ (ΡΡΠΊΠ°Π² Π₯Π°ΠΌΠ»ΡΠΎΠ½Π³) Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΡΠΎΠ΄Π° Π.Π. ΠΠ°ΡΠ°ΡΡΠ΅Π²Π° ΠΏΠΎ Π΄Π°Π½Π½ΡΠΌ ΠΏΡΠΎΠΌΠ΅ΡΠ½ΡΡ
ΡΠ°Π±ΠΎΡ Π² 1999 ΠΈ 2000 Π³Π³. Π² ΡΡΠ²ΠΎΡΠ°Ρ
, ΡΠ°ΡΠΏΠΎΠ»ΠΎΠΆΠ΅Π½Π½ΡΡ
Π² 72, 49, 14, 1 ΠΊΠΌ ΠΎΡ ΠΌΠΎΡΡΠΊΠΎΠ³ΠΎ ΠΊΡΠ°Ρ Π΄Π΅Π»ΡΡΡ. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π°ΠΊΠΊΡΠΌΡΠ»ΡΡΠΈΡ Π½Π°Π½ΠΎΡΠΎΠ² ΠΏΡΠ΅ΠΎΠ±Π»Π°Π΄Π°Π΅Ρ Π½Π° ΡΡΠ°ΡΡΠΊΠ΅ ΡΡΠΊΠ°Π²Π° Π₯Π°ΠΌΠ»ΡΠΎΠ½Π³, 0-31 ΠΊΠΌ ΠΎΡ ΠΌΠΎΡΡΠΊΠΎΠ³ΠΎ ΠΊΡΠ°Ρ Π΄Π΅Π»ΡΡΡ. ΠΠ° ΠΎΡΠ½ΠΎΠ²Π΅ Π΄Π°Π½Π½ΡΡ
Π³Π΅ΠΎΡ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΎΠΏΡΠΎΠ±ΠΎΠ²Π°Π½ΠΈΡ, ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π½ΠΎΠ³ΠΎ Π€ΡΠ½Π³ Π’Ρ
Π°ΠΉ ΠΡΠΎΠ½Π³ΠΎΠΌ Π² 2013-2014 Π³Π³., ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ, Π²ΠΎ-ΠΏΠ΅ΡΠ²ΡΡ
, Π² ΠΏΡΠ΅Π΄Π΅Π»Π°Ρ
ΡΡΠΎΠ³ΠΎ ΡΡΠ°ΡΡΠΊΠ° Π΅ΠΆΠ΅Π³ΠΎΠ΄Π½ΠΎ ΠΎΡΠ΅Π΄Π°Π΅Ρ, Ρ/Π³ΠΎΠ΄: Zn - 1244; Cu - 443; Pb - 63; Cd - 18; As - 96; Hg - 1,7. ΠΠΎ-Π²ΡΠΎΡΡΡ
, Π² Π΄Π΅Π»ΡΡΠ΅ ΠΠ΅ΠΊΠΎΠ½Π³Π° ΠΎΡΠ½ΠΎΠ²Π½Π°Ρ ΡΠ°ΡΡΡ ΠΌΠ°ΡΡΡ Zn, Cu, Pb, Cd, 73 % ΠΌΠ°ΡΡΡ As ΠΈ 69 % ΠΌΠ°ΡΡΡ Hg ΡΠΎΡΠΌΠΈΡΡΠ΅ΡΡΡ Π·Π° ΡΡΡΡ ΠΎΡΠ°ΠΆΠ΄Π΅Π½ΠΈΡ ΡΠ°ΡΡΠΈΡ Π½Π°Π½ΠΎΡΠΎΠ², Ρ ΠΊΠΎΡΠΎΡΡΠΌΠΈ (Π²ΠΎ Π²Π·Π²Π΅ΡΠ΅Π½Π½ΠΎΠΉ ΡΠΎΡΠΌΠ΅) ΠΏΠ΅ΡΠ΅Π½ΠΎΡΡΡΡΡ ΡΠΊΠ°Π·Π°Π½Π½ΡΠ΅ ΠΌΠΈΠΊΡΠΎΡΠ»Π΅ΠΌΠ΅Π½ΡΡ. 27 % ΠΌΠ°ΡΡΡ As ΠΈ 31 % ΠΌΠ°ΡΡΡ Hg ΡΠ²ΡΠ·Π°Π½ΠΎ Ρ ΡΠΎΡΠ±ΡΠΈΠ΅ΠΉ Π½Π° ΠΎΡΠ°ΠΆΠ΄Π°ΡΡΠΈΡ
ΡΡ ΡΠ°ΡΡΠΈΡΠ°Ρ
ΠΈ Π²ΡΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ΠΌ ΠΈΠ· ΡΠ°ΡΡΠ²ΠΎΡΠ° ΠΌΠ°Π»ΠΎΡΠ°ΡΡΠ²ΠΎΡΠΈΠΌΡΡ
ΡΠΎΠ΅Π΄ΠΈΠ½Π΅Π½ΠΈΠΉ. Π‘Π΄Π΅Π»Π°Π½ Π²ΡΠ²ΠΎΠ΄ ΠΎ ΡΠΎΠΌ, ΡΡΠΎ Π΄Π»Ρ ΡΠ΅Π»ΡΡΠΊΠΎΡ
ΠΎΠ·ΡΠΉΡΡΠ²Π΅Π½Π½ΠΎΠ³ΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ, ΠΈΠ·ΡΡΡΡΡ
Π² Π΄Π΅Π»ΡΡΠ΅ ΠΠ΅ΠΊΠΎΠ½Π³Π° Π½Π° ΡΡΠ°ΡΡΠΊΠ΅ ΠΎΡ 31 Π΄ΠΎ 15 ΠΊΠΌ. ΠΠΎΠ½Π½ΡΠ΅ ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΡ Π½Π° ΡΡΠ°ΡΡΠΊΠ΅ 0-15 ΠΊΠΌ Ρ Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ Π²ΡΡΠΎΠΊΠΈΠΌΠΈ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΡΠΌΠΈ ΡΠΎΠΊΡΠΈΡΠ½ΡΡ
ΠΌΠΈΠΊΡΠΎΡΠ»Π΅ΠΌΠ΅Π½ΡΠΎΠ² ΡΠ΅Π»Π΅ΡΠΎΠΎΠ±ΡΠ°Π·Π½ΠΎ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°ΡΡ Π΄Π»Ρ ΡΡΡΠΎΠΈΡΠ΅Π»ΡΠ½ΡΡ
Π½ΡΠΆΠ΄ ΠΏΡΠΈ ΠΈΠ½ΠΆΠ΅Π½Π΅ΡΠ½ΠΎΠΉ Π·Π°ΡΠΈΡΠ΅ ΠΏΡΠΈΠ±ΡΠ΅ΠΆΠ½ΡΡ
ΡΠ΅ΡΡΠΈΡΠΎΡΠΈΠΉ.Relevance. The research of formation mechanisms of natural and natural-anthropogenous geochemical anomalies in water objects plays the extremely important role in geology and geoecology is the required stage in developing long-term forecasts of ecosystems state and planning nature protection actions. One of the key aspects of the problem - the revealing of the relations between geochemical and hydrological processes in a delta of the big river - is considered by the example of the largest river of Indochina - the Mekong river. The choice of the object is caused by the value of the river in social and economic development of southeast Asia. The aim of the research is to reveal the relations between the formation of bed load sediments in the delta of the Mekong river (Vietnam) and their microelement composition. Methods of the research: landscape-geochemical and geography-hydrological methods, mathematical modelling of hydrological processes. Results and conclusions. The authors have obtained the data on microelement composition of the bed load sediments in the delta of the Mekong river and have estimated the deformations of the river channel (the Hamluong channel) using the method of A.V. Karaushev by the surveying works in 1999 and 2000 in cross-sections, located in 72, 49, 14, 1 km from sea edge of delta. It was ascertained that accumulation of sediments prevails on a site of the Hamluong channel of 0-31 km from sea edge of the delta. Based on the data of the geochemical approbation which has been carried out by Phung Thai Duong in 2013-2014 it is shown, that within this site 1244 tons of Zn; 443 tons of Cu; 63 tons of Pb; 18 tons of Cd; 96 tons of As; 1,7 tons of Hg annually settle. In the delta of the Mekong river the basic part of weights of Zn, Cu, Pb, Cd, As 73 wt. % and Hg 69 wt. % are formed due to sedimentation of particles with the specified microelements (in the suspended form). As 27 wt. % and Hg 31 wt. % are related with sorbtion on besieged particles and removing poorly soluble substances from a solution. The authors made a conclusion that the application of the bed load sediments withdrawn in the delta of the Mekong river on a site from 31 up to 15 km is optimal for agricultural use. It is appropriate to use the river sediments on a site of 0-15 km with the highest concentrations of toxic microelements for building needs at engineering protection of coastal territories
Contribution of myoglobin-induced increases in vascular resistance to shock decompensation in experimental crush-syndrome in anesthetized rats
Myoglobin is known to become nephrotoxic when released in greater amounts from skeletal muscle into the general circulation during shock. The present study deals with the question as to whether a myoglobin-induced increase in vascular tone additionally contributes to the detrimental role of this protein in hypovolemic shock. Anesthetized rats were subjected to 250 mg(.)kg(-1.)h(-1) myoglobin infused i.v.. during hemorrhagic hypotension of 50 mmHg. Shock survival time was measured, as were blood flow and vascular resistance in kidney, intestine, brain, and heart, using the microsphere method. Rats subjected to only myoglobin or hemorrhage survived a period of >120 min; in contrast, rats, exposed to both myoglobin and hemorrhage died at 68 9 min. When the animals subjected to only hemorrhage and to myoglobin/hemorrhage were compared, significantly lower values were found in the latter group with respect to blood flow in the kidney (1.7 +/- 0.1 vs. 0.2 +/- 0.05 ml(.)min(-1.)g(-1)), small intestine (1.0 +/- 0.1 vs. 0.5 +/- 0.1 ml(.)min(-1.)g(-1)), cardiac output (112 +/- 5 vs. 62 +/- 10 ml(-1.)min(-1.)kg(-1)), and significantly higher values of total peripheral vascular resistance (0.45 +/- 0.02 vs. 0.81 +/- 0.12 mmHg(.)min(.)ml(-1.)kg) at 50 min of hypotension. It is assumed that these effects of myoglobin are induced by its ability to scavenge endogenous nitric oxide, because a modified, non-nitrosylable myoglobin was unable to induce such effects. The results support the view that a pathological release of myoglobin into the general circulation causes increases in vascular resistance of vital organs that may contribute to decompensation of tissue supply when occurring in hypovolemic shock