The chapter also explores how nitrogen isotopes are fractionated during microbial transformation, however it first considers the aspects of the global nitrogen cycle and the influence of human activities.doi:10.1016/S0065-2881(05)48007-4Donald E. Canfield...
The ocean is home to a diverse and metabolically versatile microbial community that performs the complex biochemical transformations that drive the nitrogen cycle, including nitrogen fixation, assimilation, nitrification and nitrogen loss processes. In this Review, we discuss the wealth of new ocean nitro...
nitrogen cycle- the circulation of nitrogen; nitrates from the soil are absorbed by plants which are eaten by animals that die and decay returning the nitrogen back to the soil biological process,organic process- a process occurring in living organisms ...
NITROGENON September 2, at the recent British Association meeting in Newcastle, a discussion was held by Section B (Chemistry) on "The Nitrogen Cycle in Nature". Prof. G. R. Clemo, in introducing the discussion, gave a general survey of the great importfance of the nitrogen cycle in ...
The Nitrogen Cycle is one of our planet's most important nutrient or biogeochemical cycles. Why? Because nitrogen is an essential building block of all the amino acids which make up proteins, and is a critical element of the nucleic acids, DNA and RNA. In short, without nitrogen life as ...
g. the NITROGEN CYCLE. 如果这种元素是生命活动必需的,那么这种循环就叫做营养循环,例如氮循环。 plb.snnu.edu.cn 3. The nitrogen cycle is destoyed. Nitrate has become one of the most common environmental pollution factors in many parts of the world. 其中硝酸盐已成为世界上许多地区地下水污染最普遍...
The nitrogen cycle is the system by which nitrogen is converted into different chemical forms, some usable to humans and animals and some not, as it circulates among the atmosphere, the land and the oceans.
Nitrogen Cycle Processes In The Nitrogen Cycle Human Impact On The Nitrogen Cycle Fertilizers can harm the environment in a number of ways. For example, they can increase the amount of nitrogen in the atmosphere, which can contribute toglobal warming. They can also lead to the formation of ozo...
All organisms require nitrogen to live and grow. The movement of nitrogen between the atmosphere, biosphere, and geosphere in different forms is described by the nitrogen cycle. This book is an activity of the COST 856 Action on Denitrification. It covers all aspects of the N-cycle: chemistry...
The nitrogen cycle in the broadbalk wheat experiment: 15N-labelled fertilizer residues in the soil and in the soil microbial biomass A single pulse of 15N-labelled fertilizer was applied in spring as NH 4NO 3 to each of four plots on the Broadbalk Continuous Wheat Experiment. Wheat has been...