In the last 20 years, the use of computed tomography (CT) to evaluate thoracic diseases has rapidly gained popularity and CT has become firmly established as an important research and diagnostic modality. In particular, CT has played an important role in improving our knowledge about the pathophysiology of the adult respiratory distress syndrome (ARDS) and in determining the morphological and f...

A 54 year old man was admitted to our division as an emergency suffering from respiratory failure and haemoptysis. Chest radiographs and tomograms performed at another hospital showed collapse of the right lung (fig 1). The patient was given oxygen therapy and high dose steroid treatment (1 5 g of hydrocortisone daily) for 15 days. On his admission to hospital, blood gas analysis showed an arte...

The metabolism and intracellular compartmentalization of adenine nucleotides in a preparation of adult rat heart myocytes showing good morphology, viability, and tolerance to calcium ion has been examined by high performance liquid chromatography. These myocytes contain an average of 23 nmol adenine nucleotide per milligram protein which is about 60% of the adenine nucleotide content of intact ...

Tuberculosis (TB), caused by Mycobacterium tuberculosis (Mtb), is the leading cause of death from an infectious disease worldwide. Over the course of its life cycle in vivo, Mtb is exposed to a plethora of environmental stress conditions. Temporal regulation of genes involved in sensing and responding to such conditions is therefore crucial for Mtb to establish an infection. The Rv2745c (clgR) ...

many constants and coefficient effect on the modeling results. in many cases, it is possible these constants and coefficients differ from their real values in the environment, but the modeling results adapted with real boundary conditions due to other factors adjustment during modeling. uncertainty analysis is a tool for assessing the effect of uncertainty of various factors on the modeling res...

Centrifugal elutriation was applied to separate into the cell compartments asynchronous Ehrlich ascites cells grown under different culture conditions. The cytokinetic properties of the recultivated fractions were studied by flow cytometry. The present experiments prove that G1-cohorts grown 12 h under exclusion of oxygen accumulate in the late G1-compartment. The cytokinetic properties of thes...

Abstract. Carbon dioxide (CO2) emissions from running waters represent a key component of the global carbon cycle. However, quantifying CO2 fluxes across air–water boundaries remains challenging due to practical difficulties in estimation reach-scale standardized gas exchange velocities (k600) and water equilibrium concentrations. Whereas craft-made floating chambers supplied by internal sensor...

Dissolved oxygen concentrations in the lower reaches of the Tualatin River in northwest Oregon are the result of many processes. Temperature imposes a seasonal signal through the solubility of oxygen in water. Streamflow determines the travel time through the system and affects the amount of oxygen consumed via processes such as ammonia nitrification and the decomposition of organic material in...

Front cover: Flowering Iris germanica (upper picture) and Iris pseudacorus. Corresponding electron micrographs show the formation of hydrogen peroxide under hypoxia on the plasma membrane and in the cell wall. ABBREVIATIONS AA ascorbic acid ADH alcohol dehydrogenase ANP anaerobically induced proteins CD conjugated dienes CT conjugated rienes CsA cyclosporin A DHA dehydroascorbic acid DHAR dehyd...