Nutrient-rich

In California, Spirulina sp. grown in paddle-wheel-agitated open ponds with CO2 is harvested through stainless steel screens, with recycling of the nutrient-rich water to the ponds. The wet Spirulina is spray-dried at 60°C for a few seconds to yield a food-grade product (47). 

Aeration of the hypolimnion (lower, colder layer of water in a stratified lake) without disruption of stratification has been used in deep lakes. This has the advantage of not increasing the temperature of the hypolimnion and prevents the advection of nutrient-rich water into the epilimnion (upper, warmer layer of water in a stratified lake). Oxygen injection is preferred in order to prevent the build up of nitrogen super-saturation which is toxic to fish. "... 

The final article, by S. G. Bell and G. A. Codd of the University of Dundee Department of Biological Services, is concerned with detection, analysis, and risk assessment of cyanobacterial toxins. These can be responsible for animal, fish, and bird deaths and for ill-health in humans. The occurrence of toxic cyanobacterial blooms and scums on nutrient-rich waters is a world-wide phenomenon and cases are cited from Australia, the USA, and China, as well as throughout Europe. The causes, indentification and assessment of risk, and establishment of criteria for controlling risk are discussed. 

Injection of acidic, nutrient-rich water into the highly alkaline soils resulted in "cementing" of the soils. 

Winogradsky column Glass column with an anaerobic lower zone and an aerobic upper zone, which allows growth of microorganisms under conditions simitar to those found in nutrient-rich water and sediment. 

Chisholm S. W. and Morel, F. M. M. (eds) (1991). What controls phytoplankton production in nutrient-rich areas of the open sea Limnol. Oceanogr. 36, 1507-1965. 

Fig. 14-6 Profiles of potential temperature and phosphate at 21 29 N, 122 15 W in the Pacific Ocean and a schematic representation of the oceanic processes controlling the P distribution. The dominant processes shown are (1) upwelling of nutrient-rich waters, (2) biological productivity and the sinking of biogenic particles, (3) regeneration of P by the decomposition of organic matter within the water column and surface sediments, (4) decomposition of particles below the main thermocline, (5) slow exchange between surface and deep waters, and (6) incorporation of P into the bottom sediments.

Jassby AD, Cloem JE, Cole BE (2002) Annual primary production patterns and mechanisms of change in a nutrient-rich tidal estuary. Limnol Oceanogr 47 698-712... 

Several studies were performed on the optimization of expression levels of ELP proteins in E. coli. In a recent example, the expression protocol was optimized for an ELP fusion with green fluorescent protein (GFP). This fusion protein was expressed and purified in a yield of 1.6 g/L of bacterial culture, which finally yielded 400 mg GFP/L bacterial culture. This extremely high yield was found after uninduced expression in nutrient-rich medium supplemented with phosphate, glycerol and certain amino acids, such as proline and alanine [234]. The influence of fusion order was also examined and it was found that positioning the ELP at the C-terminus of target protein resulted in significantly higher expression levels [35]. 

These plant responses are largely controlled by the internal status of plant (40). On the other hand, it has been shown that the occurrence of nutrient-rich patches in the soil can trigger changes in root architecture and also in the capacity for nutrient acquisition (46,47). Recent results indicate that this behavior is dependent not only on internal (metabolic) signals but also on the capacity to sense... 

This mode of regulation seems appropriate to the ERTs since their cells are already terminally differentiated, and their primary function is to grow and provide a nutrient rich incubator for the undifferentiated neuroblasts and imaginal cells that eventually produce the reproductive adult. The response of these undifferentiated progenitor cells to food withdrawal is quite unlike that of the ERTs. Larval neuroblasts and imaginal disc cells continue to proliferate for many days after a larva is starved, and seem to complete their normal proliferation programs. In this instance the ERTs lose mass, presumably as they transfer stored nutrients to the developing nervous system and the discs. 

In terms of nutrients, the liver is the most important metabolic organ in the body. It receives a large volume of nutrient-rich blood directly from the digestive tract, which provides an abundant amount of substrates for metabolism. Metabolic processes involving carbohydrates include ... 

Although cluster roots form an interesting adaptation, species that do not form clusters generally have the same means of accessing nutrients, albeit not in such a condensed form They use root growth and branching to access nutrient-rich areas, exudation to increase nutrient availability, and absorption for uptake (Skene 2003). 

This profile becomes relevant as agricultural lands are converted. Because A Horizon soils from productive farms are valuable and nutrient-rich, land buyers usually treat them as a mineable resource for resale. Prior to construction, therefore, tractors and land moving equipment scrape the many tons of valuable soil off the surface and cart it away (consider a 100 square yard site scraped to the depth of just a few feet will produce around ten tons of soil at retail, 40-pound bags sell for 6 each). This leaves a far thinner layer of good soil near the surface. Even where intentional removal of topsoil is not conducted, construction typically leads to large-scale erosion of this valuable topsoil layer that, coupled with compaction from heavy equipment and machinery, later makes for a poor growing environment. ... 

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