fixed nitrogen
11nitrogen cycle — /ˈnaɪtrədʒən saɪkəl/ (say nuytruhjuhn suykuhl) noun the continuous circulation of nitrogen and nitrogen compounds in nature between the atmosphere, the soil, and the various organisms to which nitrogen is essential. The nitrogen cycle describes… …
12fixed carbon — n in the case of coal, coke, and bituminous materials, the solid residue other than ash, obtained by destructive distillation, determined by definite prescribed methods. DISCUSSION It is made up principally of carbon but may contain appreciable… …
13bound nitrogen — sujungtasis azotas statusas T sritis chemija apibrėžtis Junginiuose esantis NH₄⁺, NO₃⁻,NH₂⁻ pavidalo azotas. atitikmenys: angl. bound nitrogen; combined nitrogen; fixed nitrogen rus. связанный азот …
14combined nitrogen — sujungtasis azotas statusas T sritis chemija apibrėžtis Junginiuose esantis NH₄⁺, NO₃⁻,NH₂⁻ pavidalo azotas. atitikmenys: angl. bound nitrogen; combined nitrogen; fixed nitrogen rus. связанный азот …
15Heterocyst — Heterocysts are specialized nitrogen fixing cells formed by some filamentous cyanobacteria, such as Nostoc punctiforme , Cylindrospermum stagnale and Anabaena sperica , during nitrogen starvation. They fix nitrogen from dinitrogen (N2) in the air …
16Microbial metabolism — is the means by which a microbe obtains the energy and nutrients (e.g. carbon) it needs to live and reproduce. Microbes use many different types of metabolic strategies and species can often be differentiated from each other based on metabolic… …
17Nif gene — The nif gene is the gene responsible for the coding of proteins related and associated with the fixation of atmospheric nitrogen into a form of nitrogen available to plants. These genes are found in nitrogen fixing bacteria and cyanobacteria. Nif …
18Haber, Fritz — born Dec. 9, 1868, Breslau, Silesia, Prussia died Jan. 29, 1934, Basel, Switz. German physical chemist. After early research in electrochemistry and thermodynamics, he developed, with his brother in law Carl Bosch (1874–1940), the Haber Bosch… …
19Eutrophication — The eutrophication of the Potomac River is evident from its bright green water, caused by a dense bloom of cyanobacteria. Eutrophication (Greek: eutrophia healthy, adequate nutrition, development; German: Eutrophie) or more precisely… …
20environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
