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The empty forest.
Lambir Hills National Park in western Borneo is a key case study in how the forest fares when it loses the herbivores that once thinned saplings and the fruit eaters that dispersed seeds. Expand
Mammalian methylenetetrahydrofolate reductase. Partial purification, properties, and inhibition by S-adenosylmethionine.
5,10-Methylenetetrahydrofolate reductase has been purified several hundred-fold from both rat and pig liver and exhibits a strong NADPH-specific diaphorase (reduced-NAD:lipoamide oxidoreductase, EC activity. Expand
The Case of the Empty Hives
Honey bees worldwide are abandoning their hives, and scientists aren9t sure whether to blame pathogens, pesticides, or the artificial diets fed to the bees. It9s not even clear if the phenomenon isExpand
Folic Acid Metabolism In Health And Disease
Historical Perspective on Key Advances in the Biochemistry and Physiology of Folates Intestinal Absorption of Dietary Folates Intestinal Transport of Monoglutamyl Folates in Mammalian Systems FolateExpand
Vitamin B12-folate interrelationships.
The studies discussed in this review support the view that biochemical and clinical symptoms common to both folate and vitamin B12 deficiency are due to the induction of a functional folateExpand
Feared Quagga Mussel Turns Up in Western United States
Scientists are trying to assess the potential for ecological and economic damage after finding a relative of the infamous zebra mussel in the Colorado River. (Read more.)
Folate assay: a comparison of radioassay and microbiological methods.
The varied responses of folate mono- and polyglutamates in the radioassay procedures make this technique unsuitable for the determination of the mixture of folates derivatives that are normally encountered in biological extracts. Expand
New Hints Into the Biological Basis of Autism
Pushed by parent advocates, scientists are unearthing intriguing clues about what causes autism. The evidence seems to point to problems with brain development before birth and through earlyExpand
The multiple nature of the animal protein factor.
In the present investigation, it was found that chicks on a corn-soy bean diet appeared to require some other factor in addition to vitamin Blz for maximum growth. Expand