Light Reactions vs. Dark Reactions in Photosynthesis: …

Theory: Before I predict what will happen I must look at how photosynthesis occurs.

and is a main research area in artificial photosynthesis

The occurrence of photosynthesis is very important to us as humans, because it provides us with the oxygen we need to breathe and plants are at the bottom of every food-chain and so without them, I would collapse....

Photosynthesis should not occur if one of the limiting factors is not present.

Without light, photosynthesis cannot occur.

The coral was allowed to dark-acclimate overnight before minimum chlorophyll fluorescence (Fo) and maximum fluorescence (Fm - through application of a photosynthetically-saturating pulse of light) were determined. The coral was then exposed to light intensities that were incrementally adjusted upwards, and Fm' (maximum chlorophyll fluorescence while illuminated) measurements were made 15-20 minutes after light intensity was increased. Yields of Photochemistry, Non-Photochemical Quenching (of chlorophyll fluorescence) and NO (other energy dissipation pathways) were determined. When the Yield of any of these processes is multiplied by the light intensity level (PPFD, or Photosynthetic Photon Flux Density, as determined by a PAR meter), we can arrive at an estimate of the relative electron flow from Photosystem II to Photosystem I. The electron flow is called ETR for Electron Transport Rate. Since we did not measure the amount of light actually absorbed by the coral and its symbionts, this is called the Relative ETR, or rETR. The coral's zooxanthellae were allowed to acclimate to darkness for 20-30 minutes after each round of testing.

Photosynthesis mainly takes place in the palisade mesophyll cell in the leaves of plants.

I believe this will happen because when the light source is nearer to the plant more of the plants surface area is coming in to contact with the light from the desk lamp therefore more photosynthesis will occur which will mean more oxygen will be produced which will create more bubbles....

In order for photosynthesis to occur sunlight, carbon dioxide, and water are essential, however oxygen is produced in the process.


19/04/2014 · Photosynthesis under artificial light: ..

Photosynthesis captures energy for life on Earth. Many chemicals are made to allow life processes to occur in plants. These chemicals can move in and out of cells by the process of diffusion. Osmosis is a specific type of diffusion.

Artificial photosynthesis - Wikipedia

Using biomimetic approaches, artificial photosynthesis tries to construct systems doing the same type of processes. Ideally, a triad assembly could oxidize water with one , reduce protons with another and have a photosensitizer molecule to power the whole system. One of the simplest designs is where the photosensitizer is linked in tandem between a water oxidation catalyst and a hydrogen evolving catalyst:

Artificial systems can use either one type of pigment ..

One possible explanation for our results is that due to the high-energy nature of blue light, some of the blue light shining onto the juniper needles is absorbed by plant pigments other than the chlorophylls and is not transferred to the photosynthetic reactions.

and sustainable ways to collect light for artificial photosynthesis

At his institute, Emad Aziz is doing research on artificial water splitting catalysts with the goal of getting them to perform at the level of the oxygen evolution center of photosynthesis. A while back, the scientists figured out what the chemical nature of these types of energy converters would need to be. Top candidates are manganese complexes embedded in a nafion matrix, a teflon-like polymer. Leone Spiccia´s lab developed and provided the samples. He says: "Under a bias, our manganese complexes produce nanoparticles of manganese oxides within nafion matrix. When exposed to light and biased simultaneously, these oxides promote water oxidation, a key and challenging reaction associated with the splitting water into oxygen and hydrogen. The hydrogen can be stored as an energy carrier."