منابع مشابه
Algae need their vitamins.
Algae are simple photosynthetic eukaryotes which—owing to their colonization of the oceans—are responsible for up to 50% of the planet’s atmospheric carbon fixation (22). They comprise a diverse group that can broadly be defined as unicellular (microalgae) or multicellular (macroalgae) photosynthetic organisms that lack roots, stems, leaves, conducting vessels, and complex sex organs (55). A si...
متن کاملHead injury: which patients need imaging? Which test is best?
Some patients with head injuries definitely need to undergo an imaging study--usually computed tomography (CT). Most, however, are in a category of "apparently mild" injury, and controversy continues about which of them need to undergo imaging studies to rule out intracranial injuries.
متن کاملWhich Fire Extinguisher Does Your Boat Need?
Federal law and common sense both mandate adequate fire extinguishers in good order aboard all vessels. If you are unsure about the legal minimums for your class of vessel, consult the Coast Guard’s Federal Requirements for Commercial Fishing Industry Vessels. The extinguisher designations include a letter that indicates the type of fire it is designed to fight (for example, “B” for fuels and o...
متن کاملWhich endometrial pathologies need intraoperative frozen sections?
BACKGROUND Endometrial cancers are the most common gynecologic cancers. Endometrial sampling is a preferred procedure for diagnosis of the endometrial pathology. It is performed routinely in many clinics prior to surgery in order to exclude an endometrial malignancy. We aimed to investigate the accuracy of endometrial sampling in the diagnosis of endometrial pathologies and which findings need ...
متن کاملWhich Febrile Children With Sickle Cell Disease Need a Chest X-Ray?
OBJECTIVE Controversy exists regarding which febrile children with sickle cell disease (SCD) should receive a chest x-ray (CXR). Our goal is to provide data informing the decision of which febrile children with SCD presenting to the emergency department (ED) require a CXR to evaluate for acute chest syndrome (ACS). METHODS Retrospective chart review of children ages 3 months to 21 years with ...
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ژورنال
عنوان ژورنال: BMJ
سال: 1988
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.296.6639.1753