What is the N P ratio?

What is the N P ratio?

Introduction. N/P ratio, or basically the ratio of positively-chargeable polymer amine (N = nitrogen) groups to negatively-charged nucleic acid phosphate (P) groups, is perhaps one of the most important physicochemical properties of polymer-based gene delivery vehicles.

Why is the Redfield ratio 16 1?

Redfield proposed that the ratio of nitrogen to phosphorus in plankton resulted in the global ocean having a remarkably similar ratio of dissolved nitrate to phosphate (16:1). He considered how the cycles of not just N and P but also C and O could interact to result in this match.

How do you calculate NP ratio?

What are Gross Profit Ratio and Net Profit Ratio?

1. Formula:
2. Gross Profit Ratio = Gross Profit/ Net sales.
3. Gross Profit Ratio = (Gross Profit/ Net Sales) x 100.
4. For example: Given gross sales: Rs 100,000, sales return: Rs 10,000 and cost of goods sold: Rs 60000; calculate GP ratio.
5. Solution:
6. Significance and Interpretation:

How is Redfield ratio calculated?

The Redfield Ratio is just the ratio of N to P in moles. To get moles from phosphate, divide the weight based concentration, (ppm or mg/L) by 95 (g/mole) and the nitrate concentration in the same units by 62 (g/mole). For example, take the entry at 50 mg/L nitrate and 0.01 mg/L phosphate.

Why is nitrate called a proximally limiting nutrient?

Although nitrogen is incredibly abundant in the air we breathe, it is often a limiting nutrient for the growth of living organisms. This is because the particular form of nitrogen found in air—nitrogen gas—cannot be assimilated by most organisms.

Which one of these is closest to the Redfield ratio in the form of C n p?

Organic matter is initially synthesized in aquatic ecosystems mostly through algal photosynthesis, and the C:N:P. ratio is well known to be close to the Redfield ratio (106:16:1).

Where are phytoplankton the most productive throughout the whole year?

Phytoplankton are most abundant (yellow, high chlorophyll) in high latitudes and in upwelling zones along the equator and near coastlines. They are scarce in remote oceans (dark blue), where nutrient levels are low. This map shows the average chlorophyll concentration in the global oceans from July 2002–May 2010.

Which part of the plant has the highest chlorophyll concentrations?

The highest chlorophyll concentrations, where tiny surface-dwelling ocean plants are thriving, are in cold polar waters or in places where ocean currents bring cold water to the surface, such as around the equator and along the shores of continents.

What zone is phytoplankton?

Phytoplankton live in the photic zone of the ocean, where photosynthesis is possible. During photosynthesis, they assimilate carbon dioxide and release oxygen.