منابع مشابه
Equipment repaired is equipment gained
According to WHO, at any one time, around 50 per cent of medical equipment in lowand middle-income countries cannot be used because of lack of maintenance or spare parts.1 We have found that unwillingness or inability to repair equipment and put it back in use is also a major cause. New equipment is made available by different international non-government organisations (INGOs) competing with on...
متن کاملSpectrophotometric studies. XVI. Determination of the oxygen saturation of blood by a simplified technique, applicable to standard equipment.
The metabolism, as measured by oxygen consumption, of organs in situ is being increasingly investigated by the vascular catheterization technique (see Drabkin (3) for pertinent literature). The oxygen consumption is derived from the arteriovenous difference in the oxygen saturation or percentage of oxyhemoglobin (4) of blood entering and leaving the tissue. Such work has pointed to the need of ...
متن کاملProtective Equipment
Injuries involving the head and neck represent a significant proportion of sportsrelated trauma incurred by youth athletes. Approximately 6.5 % of over 2.6 million children ≤ 19 years treated for sport and recreation-related injuries in an emergency department setting between 2001 and 2009 had sustained traumatic brain injuries or concussions [1]. In this chapter, we will review the history of ...
متن کاملVoting Equipment
"In an age of electronic banking and online college degrees, why hasn't the rest of the nation gone to voting on touchscreen computers? The reason is simple and resonates with the contentious debate that has yet to be resolved after at least 15 years of wrangling over the issue of electronic voting. No one has yet figured out a straightforward method of ensuring that one of the most revered dem...
متن کاملSpectrophotometric and derivative spectrophotometric determination of aluminium with Hydroxynaphthol Blue.
The reaction of aluminium(III) with Hydroxynaphtol Blue (HNB) in aqueous media at apparent pH 5.5 results in a red complex that is stable for at least 4 hr. Beer's Law is obeyed up to 1.6 microg/ml of aluminium(III) with an apparent molar absorptivity of 1.66 x 10(4) l.mol(-1). cm(-1) at 569 nm. This paper proposes procedures for aluminium(III) determination by ordinary and first-derivative spe...
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ژورنال
عنوان ژورنال: Nature
سال: 1949
ISSN: 0028-0836,1476-4687
DOI: 10.1038/163924a0