We investigated a possible source of contamination of expired-air carbon monoxide (CO) readings on CO monitors from raised expired-air hydrogen (H2) levels, namely lactose intolerance, the norm in certain ethnic groups. A significant correlation between expired-air CO and H2 readings was observed in four non-smoking lactose maldigesters.

One hour after a bone marrow biopsy and inhalation of Entonox gas (50% nitrous oxide (N2O) and 50% oxygen), a patient had a markedly reduced transfer factor of the lung for carbon monoxide (TL,CO). Three hours after Entonox, the patient had a normal TL,CO. Since carbon monoxide (CO) and N2O have similar spectral wavelengths, it was proposed that residual N2O in the lungs was interfering with th...

OBJECTIVES To determine the normal range for carbon monoxide concentrations in the exhaled breath of subjects in the emergency department and to develop a protocol for the use of a breath analyser to detect abnormal carbon monoxide exposure. METHODS A hand held breath analyser was used to measure end expiratory carbon monoxide concentrations in 382 consenting subjects. Questionnaire data were...

Aims. The role of carbon monoxide as a cooling agent for the thermal structure of the mid-photospheric to low-chromospheric layers of the solar atmosphere in internetwork regions is investigated. Methods. The treatment of radiative cooling via spectral lines of carbon monoxide (CO) has been added to the radiation chemo-hydrodynamics code CO5BOLD. The radiation transport has now been solved in a...

Smoking high-nicotine cigarettes caused a significant increase in systolic and diastolic arterial pressure, heart rate, left ventricular end-diastolic pressure, and coronary sinus, arterial, and venous CO levels, no significant change in left ventricular dp/dt, aortic systolic ejection period, and cardiac index, and a significant decrease in stroke index and coronary sinus, arterial, and venous...

Aims. The role of carbon monoxide as a cooling agent for the thermal structure of the mid-photospheric to low-chromospheric layers of the solar atmosphere in internetwork regions is investigated. Methods. The treatment of radiative cooling via spectral lines of carbon monoxide (CO) has been added to the radiation chemo-hydrodynamics code CO5BOLD. The radiation transport is now solved in a conti...

In previous papers we have described methods for accurately measuring the spectra that represent the differences between the oxidized and the reduced forms of the cytochrome components of the turbid heart muscle particles that contain the intact succinic oxidase system (1, 2). In order to extend the pioneer observations of Keilin and Hartree on the carbon monoxide compound of cytochrome a3 (3) ...

Background: Smoking is the first preventable cause of mortality in the world. Smoking cessation is affected by various factors like nicotine dependence rate, individual issues and social factors. Measuring the level of exhaled carbon monoxide is a simple noninvasive diagnostic method for determination of smoking status and nicotine dependence; and this study evaluated its correlation with the o...

The purpose of the present study was to determine the mechanism(s) involved in carbon monoxide-releasing molecule-2, carbon monoxide-releasing molecule-2-induced cardioprotection. We used the transition metal carbonyl compound carbon monoxide-releasing molecule-2 that can act as carbon monoxide donor in cardiac ischaemia-reperfusion injury model using isolated rat heart preparation. Langendorff...

[1] The transport of biomass burning emissions from southern Africa to the neighboring Atlantic and Indian Oceans during the dry season (May–October) of 2000 is characterized using ground, ozonesonde, and aircraft measurements of carbon monoxide (CO) and ozone (O3) in and around southern Africa, together with the GEOS-CHEM global model of tropospheric chemistry. The model shows a positive bias ...