Iron sulfide mineralization in low-temperature systems is a result of biotic and abiotic processes, though the delineation between these two modes of formation is not always straightforward. Here we review the role of microorganisms in the precipitation of extracellular iron sulfide minerals. We summarize the evidence that links sulfur-metabolizing microorganisms and sulfide minerals in nature ...

p REVIOUS work in this laboratory (Crookshank and Robbins, 1962; Robbins et al., 1965) has indicated that certain physiological relationships exist among the dietary intakes of specific minerals, the corresponding levels of these minerals in the urine and the probability of urolithiasis. The purpose of these experiments was to determine whether significant physiological relationships exist amon...

Many minerals have been proven in research studies to be essential for optimal growth, physiologic function, and productivity in ruminants. Historically, testing for these minerals has been performed on diets and/or dietary components to ensure adequate concentrations of specific minerals in the diet. However, general mineral analysis does not identify the chemical forms of the minerals, which ...

Minerals are critical to an individual's health and fitness, and yet little is known about mineral nutrition and requirements in free-ranging primates. We estimated the mineral content of foods consumed by mountain gorillas (Gorilla beringei beringei) in the Bwindi Impenetrable National Park, Uganda. Mountain gorillas acquire the majority of their minerals from herbaceous leaves, which constitu...

nowadays, organic fertilizers play an important role in agriculture. they are progressively substituting chemical fertilizers to prevent their harmful impact on human health and the environment. they provide high yield, better quality products and a shorter period of harvesting crops. in this study, the mineral elements: primary macronutrient (n, po3- and k+), secondary macronutrient: (ca2+, mg...