منابع مشابه
Caution: killing germs may be hazardous to your health.
Behold yourself, for a moment, as an organism. A trillion cells stuck together, arrayed into tissues and organs and harnessed by your DNA to the elemental goals of survival and propagation. But is that all? An electron microscope would reveal that you are teeming with other life-forms. Any part of your body that comes into contact with the outside world—your skin, mouth, nose and (especially) d...
متن کاملThe Killing of Colon Bacilli by Ultraviolet Light
The survival ratios of colon bacilli subjected to several monochromatic ultraviolet radiations follow semilogarithmic straight lines. For each wave length approximate observations have been made of the energy involved in cell destruction. This energy varies somewhat with frequency in the ultraviolet region; it is furthermore nearly one hundred times as great as the amount of X-ray energy requir...
متن کاملINHIBITION OF14C UPTAKE BY CANDIDA ALBICANS: A NEW METHOD FOR INVESTIGATION OF INTRACELLULAR KILLING BY PHAGOCYTES
A radio assay employing 14C-uridine to measure the intracellular killing of Candida albicans by phagocytes is presented. The principle of this new method is that after killing of Candida albicans by phagocytes RNA synthesis stops and therefore uridine uptake is diminished whilst viable candida in cultures would take up uridine and as a result, high CPM counts can be obtained within 135 min...
متن کاملGerms and Ideas
illus., no price given. The author, to whom we are indebted for a most interesting history of Spanish obstetrics and several historical monographs, has focussed his interest on the 'enlightened' Ruiz de Luzuriagas, father and son, Basque physicians like the author. The father emerges as a great defender of smallpox inoculation, widely practised in Spain before Jenner's vaccination was universal...
متن کاملAllergens, germs and asthma
OBJECTIVE To explore asthma pathogenesis using data from upper and lower airways. DATA SOURCE English-language papers on human asthma and nasal polyp subjects from 1990 onwards. STUDY SELECTION High-quality studies in established journals. RESULTS The recognition of its inflammatory nature led to a quantum leap in the understanding and treatment of asthma, with lives saved by inhaled cort...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1910
ISSN: 0036-8733
DOI: 10.1038/scientificamerican09031910-157supp