Tag: "magnesium" at biology news

DNA constraints control structure of attached macromolecules

...ntaneously bind together, then the researchers add magnesium ions to initiate folding of the RNA. "Folding of ...A structures is controlled by the concentration of magnesium ions, Silverman said. In work not yet published, the researchers have also shown that the effects o...

UN successfully tests 'green' pesticide against locusts

...ntaneously bind together, then the researchers add magnesium ions to initiate folding of the RNA. "Folding of ...A structures is controlled by the concentration of magnesium ions, Silverman said. In work not yet published, the researchers have also shown that the effects o...

Health costs soar as 60 million Americans classed as obese

...ntaneously bind together, then the researchers add magnesium ions to initiate folding of the RNA. "Folding of ...A structures is controlled by the concentration of magnesium ions, Silverman said. In work not yet published, the researchers have also shown that the effects o...

Researchers find how some antibiotics kill bacteria

...nhibit pathogenic bacteria by removing the crucial magnesium ion (Mg2+) from a bacterium's RNA polymerase. "Removing this ion is like removing spark plugs from an engine," Artsimovitch said. "The car may look fine, but it won't run. "Until we could look under polymerase's molecular 'hood' we couldn't see wha...

'Acid rain' and forest mass: Another perspective

...sea given that, in these conditions, the uptake of magnesium with precipitation is high. Another consequence is what is known as the eutrofization of terrestrial ecosystems due to the increase in nitrogen availability (saturation) in systems where historically this element has been the limiting factor in produ...

Tropical Atlantic cooling and African deforestation correlate to drought, report scientists

...cium and trace elements. By studying the ratios of magnesium and calcium in the shells, the scientists are able to correlate that information to past temperature changes in the ocean. In analyzing these records for the past 10,000 years, the scientists found three pronounced cooling periods which indicate drou...

New study reveals promising osteoporosis treatment

... the supplement Dr. LeGeros developed by combining magnesium (Mg), zinc (Zn), and fluoride (F) ions in a calcium-phosphate (CaP) matrix does not have the side effects of the current pharmaceutical-based treatments. Perhaps more importantly, a Mg/Zn/F-CaP supplement would be inexpensive to produce and would no...

Salmonella bacteria use RNA to assess and adjust magnesium levels

...the April 7 issue of the journal Cell, responds to magnesium ions, key elements in the stability of cell membra...rium." Groisman and his colleagues uncovered the magnesium riboswitch while they were investigating the MgtA gene, which is controlled by the major regulator o...

Natural pine bark extract relieves muscle cramp and pain in athletes and diabetics

...eople who suffer from health problems. Previously, magnesium was hailed as the natural approach for relieving muscle cramps, however studies continue to show magnesium to be inefficient for reducing muscle cramps. "Pycnogenol improves the blood supply to muscle tissu...

Corals switch skeleton material as seawater changes

...at switch in response to decreases in the ratio of magnesium to calcium in seawater, Ries said. That ratio has changed dramatically over geologic time. "This is intriguing because, until now, it was generally believed that the skeletal composition of corals was fixed," he said. Ries spent two months growing...

Researchers add to understanding of how brain cells communicate

...uron. If the listening neuron is strongly excited, magnesium ions are expelled from the channel of NR1/2A recep... this. Johnson was most surprised to find that the magnesium ion, which strongly blocks the channels of NR1/2A receptors, flows much more easily in NR1/2D recept...

Scientists identify a candidate gene for osteoporosis

...important minerals such as calcium, phosphate, and magnesium into the bloodstream. This causes a reduction in BMD. To confirm the involvement of DARC in regulating BMD, Mohan's team characterized the skeletal phenotype of mice with and without the DARC gene. The DARC -knockout mice exhibited increased...

RNA enzyme structure offers a glimpse into the origins of life

...forming a pocket where the reaction takes place. A magnesium ion bound to one stem and positioned in the pocket plays an important role in the reaction, Robertson said. The structure indicates that this artificially selected ribozyme uses reaction mechanisms that are much like those used by naturally occuri...

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