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8

Yes, planting trees and burning them afterwards is a way to harvest energy from plants that's with us since millenia.


6

It is not possible to do this directly. Indirectly, it is possible, this is actually done by harvesting fruits - they contain the energy of the sunlight conserved in chemical compounds like sugars or starch and their cellular structures. The basic process for this is photosynthesis. The products from the fields are used technically to produce gas by ...


5

You are missing some knowledge here for sure, photosynthesis is a little complicated at A level, so I will describe it in brief. During photosynthesis electrons and protons (A hydrogen atom without the nucleus) are required for a process called the electron transport chain and proton motive force. This happens during the light dependent stage of ...


5

Chlorophyll can use a quite broad range of light for photosynthesis, the only range where it is not working is approximately between 500 and 620nm. See this adsorption spectrum of chlorophyll (from the Wikipedia article on Chlorophyll): The lack of chlorophyll to absorb light between 500 and 620nm (roughly) results in the green color of leafs, because ...


4

The most basic example of what I would like to talk about seems to be the algae powered lamp that has (apparently) been developped. I think you misunderstood the idea. That lamp uses bioluminescence and not electric power. Normally living cells don't like to give you energy. The trick we use is anaerob fermentation. Without the presence of oxygen ...


4

I found surprisingly little information about harvesting energy from photosynthesis Photosynthesis does not produce energy as such, it produces sugars/carbohydrates/chemical energy, which the plant then converts into energy via respiration. You can burn the sugar to produce heat. But this is basically what your doing when you burn a plant. So ...


4

You can say that but chloroplasts do not have uniform morphology across different species. Moreover some organisms such as red algae have chloroplasts of different origin. Real indicator would be lets say number of chloroplast ATP synthases and/or light harvesting photosystems; these can be perhaps indirectly approximated by the total surface area of the ...


3

First thing to note is that the absorption spectrum of chlorophyll A and chlorophyll B is similar but not the same. The reason for the appearance of absorption spectra is because the light is composed of photons of light. Different photon has different oscillation frequency and energy. The essence of Chlorophyll absorption is absorbing photons. After ...


3

As @wysiwig already pointed out the different morphology of chloroplasts is something that is hard to come by. This influences the amount of chlorophyll in these organelles which is the key for photosynthesis. So it is very difficult (to impossible) to compare chloroplasts of different plants as they differ pretty much. There is one paper from 1929 which ...


2

I would hardly ever say never where biology is concerned. In this case that utilizing red rather than blue light for a plant would require many of the basic assumptions of photosynthesis in terrestrial plants to be revised, but since we're talking about another planet, that might not really be an issue. If we are asking only about how we could change our ...


2

Phosphorus Your suggestion that if we are meeting our calorific requirement we will be getting enough is true for phosphorus. Most foods contain lots of phosphorus. The maximum dietary requirement occurs during adolescent growth, estimated at 1250 mg per day. Assuming a calorie intake of 2500 kcal we can calculate a 2500 kcal equivalent phosphorus content ...


2

This question is related to the question: Why are some things transparent and others opaque? Being able to see something requires that it is opaque and that sufficient light illuminates it. UV and shorter wavelengths are not as prevalent as visible light on earth. The world would appear too dark to see if we used UV and shorter wavelengths. This is ...


2

I had to re-read your last sentence a few times to make sure I understood it correctly, but I think that now I do, and I can answer your question. What you're talking about are thermophiles. They're small organisms that love hot conditions - up to nearly 250 degrees Fahrenheit. They can be found places with a lot of hot water, such as hot springs - and, ...


2

Lets start with the absorption spectrum first (image from the Wikipedia page in chlorophyll): What you see in the figure is the absorption of light thoughout the visible spectrum by chlorophyll a (blue) and b (red). The higher the peaks get, the higher the absorption is. What we can see, is that chlorophyll absorbs light roughly until 500 nanometers (nm) ...


1

Another alternative is using plants to generate biomasse using photosynthesis and letting bacteria convert that into electricity. There is research being done about this method and you can read more about it on the following websites: http://www.plantpower.eu/ http://plant-e.com/technology.html


1

The light dependent reactions involve an electron transport chain with enzymes embedded in the thylakoid membrane. NADPH and ATP are generated in the stroma and water is oxidized in the thylakoid lumen. I'm not sure if it's correct to say that the light independent reactions occur "at the thylakoid" since, in plants, they could really occur anywhere in the ...


1

Energy from an electron transport chain is used to actively transport protons from the stroma to the thylakoid lumen. Thus the lumen has a relatively higher proton concentration and therefore a lower pH than the stroma. Higher $[H^+]$ means lower pH. Lower $[H^+]$ means higher pH. Keep in mind that the flow of actively transported protons from the stroma ...


1

Not sure, this what you need, but here you can find a detailed description of how photosynthesis efficiency can be measured in the field, with a list of modern devices. In short, it's about measuring the uptake of CO2 and release of H2O of individual leaves.


1

A rule of thumb in optics is that light interacts with materials that have features with dimensions similar to the wavelength of light. For example, radio waves with large wavelengths interact with large objects like airplanes ,as in the case of radars, and really small wavelengths (x-rays & gamma rays) interact with really small objects like nuclei of ...


1

I am not sure about the source of ATP but I can tell you something about NADPH. The conversion of malate to pyruvate and CO₂ by malic enzyme is carried out in the bundle sheath cell. This process produces NADPH.


1

Your task is to determine how light intensity and wavelength affect ATP production. Therefore, we know for sure that your dependent variable (or response variable) should be ATP production. It is customary to depict the response variable on the vertical axis (Y-axis), so let's trying doing this. Now we need to sort the other two variables. I suggest that ...


1

http://link.springer.com/article/10.1007%2FBF00180642 study on the O2 production rate of one of the fastest growing species of cyanobacteria. The theory is not just someone's idea, its a conclusion made from trends which were discovered during the course of conducting countless experiments.



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