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Human Plants

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Human Plants

Postby Fayt » Fri Feb 25, 2005 7:40 pm

Let me pose a hypotheical situation to you. If a human had some sort of leaflike skin that had the whole shabang like chlorophil and everything else would that person be able to survive without eating?
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Postby canalon » Fri Feb 25, 2005 8:04 pm

Nope!

Because plants also need nutritional input. Not Only CO2, but also a lot of minerals and azot, and water. So it could obviously change human diet, and make it a lot simpler (but probably not as tasty as it is now : 8) ), but human would still need to eat, to replace what plant roots are collecting.

HTH

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Postby mith » Fri Feb 25, 2005 8:34 pm

You can live off sugar/fats for quite a while. I heard the record for not eating was one year. The problem is you would lack elements such as magnesium which is needed to make the chlorophyll.
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Postby canalon » Fri Feb 25, 2005 9:55 pm

You can live off sugar/fats for quite a while. I heard the record for not eating was one year. The problem is you would lack elements such as magnesium which is needed to make the chlorophyll.


I have nothing to back me up on this, but I really doubt it.
First because human are not able to produce from scratch all they need, ie vitamins, amino acids, and so on
Second because excretion of salts from sweat and urine are important, and even though could be compensated with a normal diet, salts depletion can become a problem when sweating too much.

Hence I still believe GM human/animals producing chlorophyll will still be far from being able to survive from light and water.

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Postby thank.darwin » Fri Feb 25, 2005 10:57 pm

mithrilhack wrote:You can live off sugar/fats for quite a while. I heard the record for not eating was one year. The problem is you would lack elements such as magnesium which is needed to make the chlorophyll.


Mithrilhack, the longest someone might be able to go without food is around 30 days... You need food to produce ATP and you need ATP to carry out every day reactions. And why would you need to make chlorophyll? You can't live off of sugar for awhile because you use so much of it to build up ADP.
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Postby mith » Sat Feb 26, 2005 4:30 am

Canalon, you're probably right about the salts thing, it was perhaps not tap water.

But the record for not eating is far longer than 30 days. David Blaine the magician went 44 days. Guiness declines to record it though. Another guy wants to go for 49 days....

http://english.people.com.cn/200403/08/ ... 6852.shtml
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Postby biostudent84 » Sat Feb 26, 2005 5:31 am

The average is 30 days for food.

Maybe you meant going without water? I know that one is about a year you can go.
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Postby mith » Sat Feb 26, 2005 4:29 pm

Um, are you sure?
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Postby canalon » Sat Feb 26, 2005 6:45 pm

The average is 30 days for food.

Maybe you meant going without water? I know that one is about a year you can go.


Without water the death is a matter of days. Dying of thirst is much faster than of hunger. But as I said even with water, inorganic salts, and sugar as the only carbon source, death will probably be fast. We are no bacteria that can grow on inimal medium, ther are too many important molecule we can not make for ourselves.

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practically

Postby 2810712 » Sat Mar 05, 2005 5:47 pm

I think change in diet is not enough . we have to change much more in order to be
able to feed on own .See , the changes required would also be on the molecular level .
If we eat the inorganic molecules directly in order to fulfil mineral requirements for photosynthesis , I think, it would not be much of use as we are not adapted for eat.
So, we should take them in the form we can accept them, we can eat foodst of he plants and animal origin to fulfil this need as we can accept them , but as the mineral concentration in them may be lesser we should the one with proper concentration , concentrate it further[ purify] without changing the form in which the mineral is present so that it remains acceptable.

Also, some 1/2/3 yrs before NASA noticed an old man from India who lived for more than one year without food! He used to stare sun for hours practicing some mysterious
acts. They took him for research there ... but I could find no further news .. so, how true was the story i don't know.

Hey Fayt , what a consequence , today I watched a movie containing the same IDa, there was an alien who could photosynthesize and like a battery getting down , he would get down in the dark after some time. So, I think , if we become completely dependet on photosynthesis it would be dangerous , isn't it?

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Postby mith » Sun Mar 06, 2005 12:52 am

@2810713

We can do what plants do, eat reserves at night
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what

Postby 2810712 » Tue Mar 08, 2005 5:04 am

mithrilhack,
please explain a bit more I could not understand...

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