How Does Photosynthesis Work in Algae? by Julia …
19/09/2012 · Transcript of How Does Photosynthesis Work in Algae
Photosynthesis and photorespiration in freshwater green algae
Acrylic is no where near strong enough for space applications. Even fused quartz windows have to be very thick. Water is also very heavy and therefore not suitable for space. Furthermore the maximum thickness for bubbling reactors is around 30 cm, further limiting the reactor's usefulness. Algae is also a pretty inefficient means of scrubbing CO2. The biomass is more or less useless to us and needs an entirely separate system to compost it back into useful nutrients.
Then there is the low gravity. I actually designed a low g algae bioreactor. Without gravity, bubbles do not rise and break apart. All my solutions involved either energy intensive centrifugal forces or expensive permeable membranes. Not particularly efficient.
To add to this awful set of problems I have to mention radiation. Solar radiation has a lot of hard UV. This tends to kill all but the hardiest microbes. The ionizing radiation present in space doesn't make things easier. Terran algae is too weak for that harsh environment.
I found the best solution to closed ecosystems in space was sludge hydroponics using regular plants, sludge composting, and artificial light or filtered sunlight.
are eukaryotic organisms that have characteristics of both and . Like animals, algae are capable of feeding on organic material in their environment. Some algae also contain and structures found in animals cells, such as and . Like plants, algae contain photosynthetic organelles called . Chloroplasts contain chlorophyll, a green pigment which absorbs light energy for . Algae also contain other photosynthetic pigments such as carotenoids and phycobilins.
do red algae perform photosynthesis? | Yahoo Answers
No, a breeder reactor is not the cornerstone of a secret WMD project. The word reactor is used in this context as shorthand for "reactor vessel". In this case the reactor vessel will hold algae, water and nutrients for the purposes of breeding the algae, hence the name "breeder reactor".
We'll start with the 2L soft drink or water bottle and the 3/16" drill bit. We're going to drill a hole in the center of the plastic cap, insert a piece of 1/8" rigid plastic tubing, glue that in place. Then we will fill the bottle with water, add the algae culture and nutrients and wait for nature to take it's course.
Fit the drill bit into the drill and drill a 3/16" hole in the center of the plastic cap. Cut off a 10" section of rigid plastic tubing with scissors. Feed that through the hole in the cap until approximately 1" projects from the top.
Cut off a 1" piece of the flexible plastic air hose and remove one of the air stones from the 6 pack. Attach the flexible tubing to the bottom of the air hose and attach one of the air stones to the other end.
Fill the bottle most of the way with dechlorinated or fresh water. Now add the algae sample we took earlier. A funnel isn't strictly required as long as most of the culture makes it into the reactor.
Fill the bottle up the rest of the way with dechlorinated water and insert the cap bubbler assembly. Your breeder reactor is now charged and ready.
Now take out the air pump. I selected the Tetra 799 based on its low capacity, inexpensive price and being in stock at PetSmart. Any air pump will suffice.
Decide where you will place your reactor, remember that this is a plant which uses photosynthesis. The more direct sunlight it recieves the better. Locate an outlet for the pump. Cut a length of flexible tubing that will reach from the air pump to the input located on the cap. Attach the pump to the reactor with the tubing. Tighten the plastic cap down and then open it 1/4 turn. This will allow the scrubbed air and generated oxygen to escape.
At this point you are actively scrubbing carbon and breeding algae for the next phase of the reactor.
In many documents about growing algae the concept of how to get algae is arguably the most intimidating step. Practically all of the sites have recommended scientific supply houses which offer exotic algae culture specimens suitable for advanced use in the latest biotechnology project.
Fortunately we're not doing that and therefore we can take advantage of the fact that algae will grow anywhere in water unless one works actively to prevent it. Ask any aquarium owner.
So first we will obtain an algae sample.
If you know somebody who has a fish tank the simplest solution is to ask them for an algae sample before they clean it next time. Scrape the green stuff off the side of the aquarium along with a little bit of fish tank water. Trust me, that's all the algae you're going to need.
As an alternative you might check with a friend or neighbor who has a hot tub. Algae like warm temperatures so a healthy sample might easily be available before the hot tub cleaning cycle. Different folks have different tolerances for chemicals and some folks might have more or less aggressive chemical policies. The hot tub at your spa probably isn't going to yield a good sample....and if it does you might consider changing spas....also remember to be a tactful when asking that neighbor you don't know so well if they've got a hot tub full green, floating goo...
Alternatively algae cultures may be obtained by getting a little water out of a natural stream, creek, pond or lake. In this case it's been raining here lately and a nice algae culture has taken root in the birdbath. I drew out a small sample, trying to keep it clean. While we're not concerned with pure algae cultures at this time we want to reduce the number of miscellaneous micro-organisims we include.
Once we've obtained a reasonable sample we're going to breed the algae in order to produce the feedstock for the scrubber. In order to do that we're build a high volume breeder reactor in our next step.
Algal Photosynthesis - eLS: Essential for Life Science
The intensively cultivated agricultural plants average about 3% in photosynthetic efficiency, and most crops range from 1-4%. This is also typical of algae.
Algae are a very diverse group of predominantly aquatic photosynthetic organisms that account for almost 50% of the photosynthesis that takes place on Earth. Algae have a wide range of antenna pigments to harvest light energy for photosynthesis giving different types of algae their characteristic colour. Early work done with algae contributed much to what is presently known about the carbon dioxide fixation pathway and the light harvesting reactions. The processes of photosynthesis in algae and higher plants are very similar. From among the three types of carbon dioxide‐concentrating mechanisms known in photosynthetic organisms, two types are found in different types of algae. Algae are proposed to play a role in the global carbon cycle by helping remove excess carbon dioxide from the environment. Recently, algae are recognized as a promising biodiesel source due to its efficient absorption and conversion of solar energy into chemical energy.
Photosynthetic Organisms - Plants, Algae, Cyanobacteria
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Photosynthesis is a process by which plants, algae, and some species of bacteria, produce their own food
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Introduction to the Cyanobacteria - UCMP
Cyanobacteria are oxygenic photosynthetic . They harvest the sun's energy, absorb carbon dioxide, and emit oxygen. Like plants and algae, cyanobacteria contain chlorophyll and convert carbon dioxide to sugar through carbon fixation. Unlike eukaryotic plants and algae, cyanobacteria are . They lack a membrane bound , , and other found in and . Instead, cyanobacteria have a double outer and folded inner thylakoid membranes that are used in . Cyanobacteria are also capable of nitrogen fixation, a process by which atmospheric nitrogen is converted to ammonia, nitrite, and nitrate. These substances are absorbed by plants to synthesis biological compounds.
Introduction to the Cyanobacteria
Anoxygenic photosynthetic bacteria are photoautotrophs (synthesize food using sunlight) that don't produce oxygen. Unlike cyanobacteria, plants, and algae, these bacteria don't use water as an electron donor in the during the production of ATP. Instead, they use hydrogen, hydrogen sulfide, or sulfur as electron donors. Anoxygenic photosynthetic bacteria also differ from cyanobaceria in that they do not have chlorophyll to absorb light. They contain bacteriochlorophyll, which is capable of absorbing shorter wavelengths of light than chlorophyll. As such, bacteria with bacteriochlorophyll tend to be found in deep aquatic zones where shorter wavelengths of light are able to penetrate.
Architects of earth's atmosphere
Algae can be unicellular or can exist as large multicellular species. They live in various habitats including salt and freshwater , wet soil, or on moist rocks. Photosynthetic algae known as phytoplankton are found in both marine and freshwater environments. Most marine phytoplankton are composed of and . Most freshwater phytoplankton are composed of and cyanobacteria. Phytoplankton float near the surface of the water in order to have better access to sunlight needed for photosynthesis. Photosynthetic algae are vital to the global such as carbon and oxygen. They remove carbon dioxide from the atmosphere and generate over half of the global oxygen supply.
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