Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Biological products composition

The determined macro- and microelement stmcture of mumio specifies onto the expediency of the application of this biologically active substance as a cosmetic raw material in the cosmetic compositions, which do not contain carbopol. The developed procedure for calcium and sodium ions determination in pectin-containing vegetative extracts is express and it is recommended for application at elaboration of cosmetic production compositions on the carbopol base. [Pg.375]

Estuaries exhibit physical and chemical characteristics that are distinct from oceans or lakes. In estuaries, water renewal times are rapid (10 to 10 years compared to 1 to 10 years for lakes and 10 years for oceans), redox and salinity gradients are often transient, and diurnal variations in nutrient concentrations can be significant. The biological productivity of estuaries is high and this, coupled with accumulation of organic debris within estuary boundaries, often produces anoxic conditions at the sediment-water interface. Thus, in contrast to the relatively constant chemical composition of the... [Pg.403]

Fig. 6-5. The evolution of the lagoon s waters in response to oscillations in biological productivity. The results show the adjustment of the system from an initial composition equal to that of seawater. This figure shows isotope ratios, calcium concentration, the saturation index, and productivity. Fig. 6-5. The evolution of the lagoon s waters in response to oscillations in biological productivity. The results show the adjustment of the system from an initial composition equal to that of seawater. This figure shows isotope ratios, calcium concentration, the saturation index, and productivity.
In this chapter I explained how isotope ratios may be calculated from equations that are closely related, but not identical, to the equations for the bulk species. Extra terms arise in the isotope equations because isotopic composition is most conveniently expressed in terms of ratios of concentrations. I illustrated the use of these equations in a calculation of the carbon isotopic composition of atmosphere, surface ocean, and deep ocean and in the response of isotope ratios to the combustion of fossil fuels. As an alternative application, I simulated the response of the carbon system in an evaporating lagoon to seasonal changes in biological productivity, temperature, and evaporation rate. With a simulation like the one presented here it is quite easy to explore the effects of various perturbations. Although not done here, it would be easy also to examine the sensitivity of the results to such parameters as water depth and salinity. [Pg.97]

The delivery of PIC and POC to the sediments depends on biological production in the surface waters. The input of terrestrial carbon is relatively minor. The relative proportions of PIC and POC generated in the surfece waters reflect the species composition of the plankton, i.e., calcifiers versus noncalcifiers. The success of detrital PIC and POC in surviving the trip to the seafloor is also dependent on the species composition of the plankton. As discussed in Chapter 23.5.4, the presence of biogenic hard parts confers protection on POC, inhibiting its remineralization. [Pg.716]

Carbonates deposited in freshwater lakes exhibit a wide range in isotopic composition, depending upon the isotopic composition of the rainfall in the catchment area, its amount and seasonality, the temperature, the rate of evaporation, the relative humidity, and the biological productivity. Lake carbonates typically consist of a matrix of discrete components, such as detrital components, authigenic precipitates, neritic, and benthic organisms. The separate analysis of such components has the potential to permit investigation of the entire water column. For example, the oxygen isotopic... [Pg.203]

Petterson, D.S. (1998) Composition and food uses of legumes. In Gladstones, J.S., Atkins, C.A. and Hamblin, J. (eds) Lupins as Crop Plants. Biology, Production and Utilization. CAB International, Wallingford, UK. [Pg.158]

Pitzyk GK (1979) Systematic composition of phytoplankton. In Greze VN (ed) Bases of biological productivity of the Black sea. Naukova Dumka, Kiev, p 63 (in Russian)... [Pg.371]

Nitrate is the largest pool of combined nitrogen in the ocean, with deep water concentrations around 20 to 30 pmol L in the Atlantic and up to 45 pmol in the Pacific. The isotopic composition of the NOs" pool is affected by a variety of processes that move N in and out of the ocean or its biota (Fig. 29.3), and subsurface N03 acts as a critical isotopic end member for biological production in the upper water column. Of the processes shown in Fig. 29.3, pelagic denitrification and N2-fixation are generally viewed as the major, long-term controls on the size and isotopic composition of the oceanic pool of NOs" (Brandes and Devol, 2002). [Pg.1283]

J. C. May, R. M. Wheeler, and A. Del Grosso, Compositional analysis of drugs and injectable biological products by thermogravimetry, in ASTM Special Technical Publication 997. Philadelphia American Society for Testing and Materials, 1988, pp. 48-56. [Pg.230]

Anthropogenic trace metals are entering the surface waters of the B altic Sea via atmospheric and riverine inputs (Schneider et al., 2000 HELCOM, 1997,). Their transport through the water column is closely linked to the seasonal variation in biological production and the composition of suspended particulate matter. [Pg.382]

Investigations focused on the quantitative vertical particulate export of trace metals (Mn, Fe, Cd, Cu, Zn, Pb, Ni, As) through the pycnocline into the deepwater body under seasonal variations and in relation to biological production and composition of particulate material have been carried out by Pohl et al. (2004) in the Gotland Basin (Baltic Proper). [Pg.382]

Table 3 Composition of Approved Biological Products (Continued)... [Pg.338]


See other pages where Biological products composition is mentioned: [Pg.228]    [Pg.127]    [Pg.34]    [Pg.466]    [Pg.122]    [Pg.71]    [Pg.83]    [Pg.327]    [Pg.166]    [Pg.264]    [Pg.334]    [Pg.517]    [Pg.228]    [Pg.967]    [Pg.433]    [Pg.367]    [Pg.205]    [Pg.197]    [Pg.6]    [Pg.245]    [Pg.322]    [Pg.212]    [Pg.1278]    [Pg.215]    [Pg.3177]    [Pg.3337]    [Pg.3346]    [Pg.3348]    [Pg.3765]    [Pg.4399]    [Pg.4401]    [Pg.686]    [Pg.686]    [Pg.134]    [Pg.233]   
See also in sourсe #XX -- [ Pg.337 , Pg.338 , Pg.339 , Pg.340 , Pg.341 , Pg.342 , Pg.343 , Pg.344 , Pg.345 , Pg.346 , Pg.347 ]




SEARCH



Approved biological products composition

Biological product

Biological production

Biologies composition

Product composition

Production composites

© 2024 chempedia.info