Capture light energy to undergo photosynthesis
16/01/2018 · Approximate efficiency of the conversion of light energy to chemical energy in photosynthesis
The maximum efficiency of photosynthesis (PDF …
One key property of energy is given by the first law of thermal dynamics: It cannot be created or destroyed; it is only transformed from one form to another. So in the context of energy resources, we really mean those kinds of energy that can readily be converted to human-usable forms (e.g., mechanical work, heat, or light). Therefore, the process of energy conversion becomes critical, so does the conversion efficiency.
McCree (1972a) noted that the relative quantum yield for crop plant photosynthesis has two peaks at 440 nm and 620 nm. He also noted however, the , which states that photosynthesis in the presence of two or more wavelengths can be more efficient than the sum of that due to the individual wavelengths. In particular, adding white or red light (less than 680 nm) to deep red light (greater than 680 nm) can beneficially increase the rate of photosynthesis.
Photosynthetic efficiency - Wikipedia
It can be helpful at this juncture to grasp the cumulative impact of , inventing , inventing , inventing that made possible, and inventing . Pound-for-pound, the complex organisms that began to dominate Earth’s ecosphere during the Cambrian Period consumed energy about 100,000 times as fast as the Sun produced it. Life on Earth is an incredibly energy-intensive phenomenon, powered by sunlight. In the end, only so much sunlight reaches Earth, and it has always been life’s primary limiting variable. Photosynthesis became more efficient, aerobic respiration was an order-of-magnitude leap in energy efficiency, the oxygenation of the atmosphere and oceans allowed animals to colonize land and ocean sediments and even fly, and life’s colonization of land allowed for a . Life could exploit new niches and even help create them, but the key innovations and pioneering were achieved long ago. If humanity attains the , new niches will arise, even of the , but all other creatures living on Earth have constraints, primarily energy constraints, which produce very real limits. Life on Earth has largely been a for several hundred million years, but the Cambrian Explosion was one of those halcyonic times when animal life had its greatest expansion, not built on the bones of a mass extinction so much as blazing new trails.
According to one measure, was 100,000,000% "efficient," which was slightly over the threshold for classifying it. Sparky never patented his device and kept it proprietary, which avoided seizure that way, but that . Thousands of energy technology inventors have had their under the national security laws, and that is merely the tip of the iceberg of what has been suppressed. What led to pursuit of FE was when he met with a faction of the GCs in the early 1990s. In 2004, I heard Greer report on his conversations with them; one disclosure was that the GCs had paid $100 billion in bribes and quiet money to sequester disruptive technologies over the years, and energy technologies above all. When , it made perfect sense to me, as Dennis rejected two offers that I know of, and I even heard of others in and plenty of other such tales from people in the field. Greer claimed to have rejected a $2 billion offer to cease his efforts. That quiet money amount might be $200 billion by now.
The photosynthetic efficiency is the ..
As with other early life processes, the first photosynthetic process was different from today’s, but the important result – capturing sunlight to power biological processes – was the same. The scientific consensus today is that a respiration cycle was modified, and a in a was used for capturing sunlight. Intermediate stages have been hypothesized, including the cytochrome using a pigment to create a shield to absorb ultraviolet light, or that the pigment was part of an infrared sensor (for locating volcanic vents). But whatever the case was, the conversion of a respiration system into a photosynthetic system is considered to have only happened , and all photosynthesizers descended from that original innovation.
Unfortunately, and as we have seen in this and other lectures, there are true limits to primary production based on the amount of light energy available at Earth's surface, and the efficiency at which light energy can be converted into carbon during photosynthetic reactions.
the theoretical maximum efficiency of solar energy conversion is ..
The conversion of Light energy, ..
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Photosynthesis is the process used by plants to convert electromagnetic radiation – light – into chemical energy that is used for growth and development. All that is needed for this process is carbon dioxide (CO2), nutrients, and water. The process itself is not particularly efficient; only 4 to 6 percent of the absorbed radiation is converted into chemical energy (Zhu et al. 2010, Table 2). Still, it is the engine that drives most life on this planet.
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