Ferrous iron uptake by Bifidobacterium breve.
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(0) (0 Votes)Views: (2) Date: (1989-6-1) Pages: () -
Author: L Solberg
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Abstract: Bifidobacterium breve transports ferrous iron in preference to the ferric form in a saturable, concentration-depend ent manner with an optimum pH of 6. Iron transport is highly temperature sensitive. Two transport systems with apparent Km's of 86 +/- 27 and 35 +/- 20 microM (p greater than 0.01) were distinguished, one operating at high iron concentrations, the other at low iron concentrations. Iron uptake could not be accounted for by surface binding. Uptake of iron was inhibited by iron chelators, a protein ionophore, and ATPase inhibitors, and it was stimulated by potassium ionophores. The presence of a ferri reductase in the insoluble cell fraction of B. breve and its "spent" growth medium was demonstrated. The hypothesis is presented that iron uptake by bifidobacteria is related to the nutritional immunity phenomenon.
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News
- Falcone’s Harbinger Seeking to Sell Stake in Ferrous Resources
Harbinger Capital Partners LLC, the New York-based hedge fund run by billionaire Phil Falcone, is seeking to sell shares in Brazilian iron-ore producer Ferrous Resources Ltd. to raise cash for loan repayments. - Falcone’s Harbinger Seeking to Sell Stake in Ferrous
Harbinger Capital Partners LLC, the New York-based hedge fund run by billionaire Phil Falcone, is seeking to sell shares in Brazilian iron-ore producer Ferrous Resources Ltd. to raise cash for loan repayments. - Falcone’s Harbinger Seeking to Sell Ferrous Stake to Repay Jefferies Loan
Harbinger Capital Partners LLC, the New York-based hedge fund run by billionaire Phil Falcone, is seeking to sell shares in Brazilian iron-ore producer Ferrous Resources Ltd. to raise cash for loan repayments. - Falcone-Backed Ferrous Said to Appoint Nicolato as New CEO
Ferrous Resources Ltd., the iron-ore miner backed by billionaire Philip Falcone’s Harbinger Capital partners LLC, appointed Jayme Nicolato Correa as chief executive officer, a person familiar with the situation said. - Ferrous Resources Said to Appoint Jayme Nicolato as New CEO
Ferrous Resources Ltd., the iron ore miner backed by billionaire Philip Falcone’s Harbinger Capital partners LLC, appointed Jayme Nicolato Correa as chief executive officer, a person familiar with the situation said. - Falcone-Backed Ferrous Resources Said to Name Nicolato Correa as Next CEO
Ferrous Resources Ltd., the iron ore miner backed by billionaire Philip Falcone’s Harbinger Capital partners LLC, appointed Jayme Nicolato Correa as chief executive officer, a person familiar with the situation said. - Ferrous Said to Propose $2.3 Billion Takeover of MMX
Ferrous Resources Ltd., a closely held Brazilian iron-ore producer, proposed a $2.3 billion takeover of MMX Mineracao & Metalicos SA last month, according to a letter detailing the plan obtained by Bloomberg News. - Ferrous Said to Propose $2.3 Billion Takeover of Brazil’s MMX
Ferrous Resources Ltd., a closely held Brazilian iron-ore producer, proposed a $2.3 billion takeover of MMX Mineracao & Metalicos SA last month, according to a letter detailing the plan obtained by Bloomberg News. - Falcone-Backed Ferrous Said to Offer $2.3 Billion for MMX
Ferrous Resources Ltd., a closely held Brazilian iron-ore producer, proposed a $2.3 billion takeover of MMX Mineracao & Metalicos SA last month, according to a letter detailing the plan obtained by Bloomberg News. - Ferrous Resources CEO Quits as Iron-Ore Miner Seeks Partners
Ferrous Resources Ltd. Chief Executive Officer Mozart Litwinski resigned as the iron-ore producer seeks partners to fund Brazilian mining projects.
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Sustainable_development.svg‎ (SVG file, nominally 640 × 480 pixels, file size: 11 KB)