Biological nitrogen cycling

Biological nitrogen fixation was discovered by the German agronomist Hermann Hellriegel and Dutch microbiologist Martinus Beijerinck.

* Biological nitrogen fixation, a process that converts nitrogen in the atmosphere to ammonia

# Biological fixation: some symbiotic bacteria ( most often associated with leguminous plants ) and some free-living bacteria are able to fix nitrogen as organic nitrogen.

Biological nitrogen fixation for sustainable agriculture: A perspective.

Biological nitrogen fixation: Investments, expectations and actual contributions to agriculture.

Jake Beaulieu, a postdoctoral researcher the Environmental Protection Agency in Cincinnati, Ohio and Jennifer Tank, Galla Professor of Biological Sciences at the University of Notre Dame, are lead authors of new paper demonstrating that streams and rivers receiving nitrogen inputs from urban and agricultural land uses are a significant source of nitrous oxide to the atmosphere.

The general method to do this is to monitor sludge blanket level, SVI ( Sludge Volume Index ), MCRT ( Mean Cell Residence Time ), F / M ( Food to Microorganism ), as well as the biota of the activated sludge and the major nutrients DO ( Dissolved oxygen ), nitrogen, phosphate, BOD ( Biological oxygen demand ), and COD ( Chemical oxygen demand ).

* Biological overfishing occurs when fishing mortality has reached a level where the stock biomass has negative marginal growth ( reduced rate of biomass growth ), as indicated by the red area in the figure.

Biological macromolecules that catalyze a thermodynamically favorable reaction if and only if a thermodynamically unfavorable reaction occurs simultaneously underlie all known forms of life.

Biological oceanographer Paul Falkowski and marine biologist Andrew Baker from the Wildlife Conservation Society study bleaching and why it occurs.

Biological terrorism dates as far back as Ancient Rome, when feces were thrown into faces of enemies.

Biological effects of non-thermal origin have been reported in animals but, to date, no such effects have been demonstrated in humans, except when a microbubble contrast agent is present.

Biological agents such as parasites, microorganisms, plants and animals can have varied effects when exposed to the skin.

In his definition of " disarmament ", David Carlton writes in the Oxford University Press Political dictionary, " But confidence in such measures of arms control, especially when unaccompanied by extensive means of verification, has not been strengthened by the revelation that the Soviet Union in its last years successfully concealed consistent and systematic cheating on its obligations under the Biological Weapons Convention.

The Fish and Wildlife Service was finally created in 1940, when the Bureaus of Fisheries and Biological Survey were combined after being moved to the Department of the Interior.

Solomons was a rather isolated boat-building town housing the University of Maryland Chesapeake Biological Laboratory, until 1977 when the Governor Thomas Johnson Bridge was built.

Biological agents, such as Cetuximab have recently been shown to be effective in the treatment of squamous cell head and neck cancers, and are likely to have an increasing role in the future management of this condition when used in conjunction with other treatments.

The PPARC was formed in April 1994 when the Science and Engineering Research Council was split into several organizations ; other products of the split included the Engineering and Physical Sciences Research Council ( EPSRC ) and the Biotechnology and Biological Sciences Research Council ( BBSRC ).

In 1991 he was invited by the Italian Biological Society to make an anniversary lecture, when he was the oldest living member of the society ; for this lecture, Young picked the same subject he had talked about 63 years earlier, in 1928.

The vehicle is NBC ( Nuclear, Biological and Chemical ) proofed and has an air filtration unit, supplying clean air to the crew when operating with the crew hatches closed down in a contaminated environment.

USAMRIID traces its institutional lineage to the early 1950s, when Lt. Col. Abram S. Benenson was appointed as medical liaison officer to the U. S. Army Biological Warfare Laboratories ( BWL ) at Camp ( later Fort ) Detrick to oversee biomedical defensive problems.

Biological warfare is the intentional use of living microorganisms or their toxic products for the purpose of destroying or reducing the military effectiveness of man.

Biological warfare is considered to be primarily a strategic weapon.

Biological classification is a form of scientific taxonomy.

Biological warfare ( also known as germ warfare ) is the use of biological toxins or infectious agents such as bacteria, viruses, and fungi with intent to kill or incapacitate humans, animals or plants as an act of war.

There is an overlap between biological warfare and chemical warfare, as the use of toxins produced by living organisms is considered under the provisions of both the Biological Weapons Convention and the Chemical Weapons Convention.

Biological processes play a major role in the removal of contaminants and biotechnology is taking advantage of the astonishing catabolic versatility of microorganisms to degrade / convert such compounds.

Biological organisms contain genetic material that is used to control their function and development.

Costa Rica is party to many environmental treaties, including the Convention on Biological Diversity, the Convention on Environmental Modification, the United Nations Framework Convention on Climate Change, the Montreal Protocol, the Ramsar Convention, the International Convention for the Regulation of Whaling, the Desertification Convention, the Endangered Species Convention, the Basel Convention, the Convention on the Law of the Sea, the Convention on Marine Dumping, the Comprehensive Test Ban Treaty.

The Kerckhoff Laboratory of the Biological SciencesThe Institute is organized into six primary academic divisions: Biology, Chemistry and Chemical Engineering, Engineering and Applied Science, Geological and Planetary Sciences, Humanities and Social Sciences, and Physics, Mathematics, and Astronomy.

The Convention on Biological Diversity ( CBD ), known informally as the Biodiversity Convention, is an international legally binding treaty.

The Secretariat of the Convention on Biological Diversity is the focal point for the International Year of Biodiversity.

The Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from their Utilization ( ABS ) to the Convention on Biological Diversity is a supplementary agreement to the Convention on Biological Diversity.

Biological taxonomy is not fixed, and placement of taxa is reviewed as a result of new research.

El Salvador is party to the Convention on Biological Diversity, United Nations Framework Convention on Climate Change, Kyoto Protocol to the United Nations Framework Convention on Climate Change, United Nations Convention to Combat Desertification, CITES, Basel Convention, Partial Test Ban Treaty, Montreal Protocol, Ramsar Convention.

Critics, including the Center of Biological Diversity and New Mexico Department of Game and Fish, were concerned the jaguar was being sacrificed for the government's new border fence, which is to be built along many of the cat's typical crossings between the United States and Mexico.

The John Anderson school collapsed soon after Agassiz's death, but is considered a precursor of the Woods Hole Marine Biological Laboratory, which is nearby.

Biological evolution proceeds by random variation in ensemble averages of organisms combined with culling of the less-successful variants and reproduction of the more-successful variants, and macroscale engineering design also proceeds by a process of design evolution from simplicity to complexity as set forth somewhat satirically by John Gall: " A complex system that works is invariably found to have evolved from a simple system that worked.

China is a party to the Antarctic-Environmental Protocol, the Antarctic Treaty, the Convention on Biological Diversity, the Climate Change treaty, the United Nations Convention to Combat Desertification, the Endangered Species treaty, the Hazardous Wastes treaty, the Law of the Sea, the International Tropical Timber Agreements of 1983 and 1994, the International Convention for the Regulation of Whaling, and agreements on Marine Dumping, Ozone Layer Protection, Ship Pollution, and Wetlands protection.

Biological anthropology ( also known as bioanthropology and physical anthropology ) is a branch of anthropology that studies the physical development of the human species.

The nomenclature of the field is not exact: the relevant subdivision of the American Anthropological Association is the Biological Anthropology Section while the principal professional organization is the American Association of Physical Anthropologists.