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Topic: Weather, Climate, Environment, and Energy

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Cincydawg

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Re: Weather, Climate, and Environment
« Reply #560 on: August 14, 2018, 09:41:01 PM »
I saw a Chevy Tahoe in Lake Tahoe today.

MrNubbz

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Re: Weather, Climate, and Environment
« Reply #561 on: August 15, 2018, 08:43:34 AM »
Holy/Cussin Jim sounds like a Browns Fan
Suburbia:Where they tear out the trees & then name streets after them.

MrNubbz

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Re: Weather, Climate, and Environment
« Reply #562 on: August 15, 2018, 08:44:40 AM »
I heard on the radio that he stands to be punished with life in prison.


It would be better to burn him, if found guilty.
Give him a fair trial followed by a 1st class hanging
Suburbia:Where they tear out the trees & then name streets after them.

FearlessF

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Re: Weather, Climate, and Environment
« Reply #563 on: August 15, 2018, 09:12:22 AM »
lethal injection seemed to work in Nebraska yesterday
"Courage; Generosity; Fairness; Honor; In these are the true awards of manly sport."

MrNubbz

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Re: Weather, Climate, and Environment
« Reply #564 on: August 15, 2018, 11:37:20 AM »
Good Point,pun intended
Suburbia:Where they tear out the trees & then name streets after them.

FearlessF

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Re: Weather, Climate, and Environment
« Reply #565 on: August 15, 2018, 11:42:19 AM »
some folks in my office yesterday were watching the live stream of the execution........

video simply showed the double doors of the execution room - nothing more

fascinating!
"Courage; Generosity; Fairness; Honor; In these are the true awards of manly sport."

FearlessF

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Re: Weather, Climate, and Environment
« Reply #566 on: August 15, 2018, 01:52:06 PM »
Scientists have found a rapid way of producing magnesite, a mineral which stores carbon dioxide. If this can be developed to an industrial scale, it opens the door to removing CO2 from the atmosphere for long-term storage, thus countering the global warming effect of atmospheric CO2. This work is presented at the Goldschmidt conference in Boston.

Read more at: https://phys.org/news/2018-08-scientists-mineral-co2-atmosphere.html#jCp
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Anonymous Coward

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Re: Weather, Climate, and Environment
« Reply #567 on: August 15, 2018, 02:40:47 PM »
Scientists have found a rapid way of producing magnesite, a mineral which stores carbon dioxide. If this can be developed to an industrial scale, it opens the door to removing CO2 from the atmosphere for long-term storage, thus countering the global warming effect of atmospheric CO2. This work is presented at the Goldschmidt conference in Boston.

Read more at: https://phys.org/news/2018-08-scientists-mineral-co2-atmosphere.html#jCp
Interesting. I have long been curious who'd outpace who, the material scientists or the biochemists trying to take the most common protein in the world (Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase) and let engineered evolution do the work for them. Both sides have some serious obstacles. With this "magnesite" for example, I can't imagine it'll be easy or obvious what to do with that mass of it.

Entropy

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Re: Weather, Climate, and Environment
« Reply #568 on: August 15, 2018, 10:14:23 PM »
Interesting. I have long been curious who'd outpace who, the material scientists or the biochemists trying to take the most common protein in the world (Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase) and let engineered evolution do the work for them. Both sides have some serious obstacles. With this "magnesite" for example, I can't imagine it'll be easy or obvious what to do with that mass of it.
from Wikipedia....
Uses[edit]


Dyed and polished magnesite beads


Magnesite of Salem
Similar to the production of lime, magnesite can be burned in the presence of charcoal to produce MgO, which, in the form of a mineral, is known as periclase. Large quantities of magnesite are burnt to make magnesium oxide: an important refractory material used as a lining in blast furnaces, kilns and incinerators. Calcination temperatures determine the reactivity of resulting oxide products and the classifications of light burnt and dead burnt refer to the surface area and resulting reactivity of the product, typically as determined by an industry metric of the iodine number. 'Light burnt' product generally refers to calcination commencing at 450 °C and proceeding to an upper limit of 900 °C - which results in good surface area and reactivity. Above 900 °C, the material loses its reactive crystalline structure and reverts to the chemically inert 'dead-burnt' product- which is preferred for use in refractory materials such as furnace linings.
Magnesite can also be used as a binder in flooring material (magnesite screed).[15] Furthermore, it is being used as a catalyst and filler in the production of synthetic rubber and in the preparation of magnesium chemicals and fertilizers.
In fire assay, magnesite cupels can be used for cupellation as the magnesite cupel will resist the high temperatures involved.
Magnesite can be cut, drilled, and polished to form beads that are used in jewelry-making. Magnesite beads can be dyed into a broad spectrum of bold colors, including a light blue color that mimics the appearance of turquoise.
Research is proceeding to evaluate the practicality of sequestering the greenhouse gas carbon dioxide in magnesite on a large scale[16].


MarqHusker

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Re: Weather, Climate, and Environment
« Reply #569 on: August 15, 2018, 11:03:32 PM »
lethal injection seemed to work in Nebraska yesterday
I was a freshman when they last executed a man in NE.  Otey.  Forget his first name.

Cincydawg

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Re: Weather, Climate, and Environment
« Reply #570 on: August 21, 2018, 10:39:49 AM »
The problem with pulling CO2 out of the air is interestingly enough one of entropy (and enthalpy of course).  You have an "impurity" that is about 400 ppm in a something and you want some portion of that impurity.  Just on general principles, that is going to take a lot of energy, somehow.

You can do it of course with caustic, like KOH, but it takes energy to generate KOH.  And then you have K2CO3 to dispose of in some protected environment.  And even this process takes a while depending on surface area, so you have kinetics to ponder as well.

You can of course cool the air down to the temperature of dry ice, but that takes energy.  Then you have to manage the dry ice.



Anonymous Coward

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Re: Weather, Climate, and Environment
« Reply #571 on: August 21, 2018, 01:23:53 PM »
No doubt. And on the RuBisCO side of things, there are similar challenges, engineering the enzyme as more of a carboxylase (less of an oxygenase) - both an entropy and enthalpy challenge. And then there's a matter of yield (also a surface area challenge, whether the chosen vehicle is a leaf or unicellular). 
And then finally there's the matter of product stability, which for RuBisCO strategies is probably the tallest obstacle. All photosynthesizers, for example, are professional fixers of carbon. But they also die in relatively short order and are consumed by organisms that engage cellular respiration, and that permits molar equivalents of CO2 to return to the atmosphere. That's why we say these plants are part of the carbon cycle. Which plants leave the carbon cycle? Well so far it's only been the rare ones that fall into stagnant swamps and ultimately find their chemical makeup held in tact as the earth changes over geological time and they find themselves under countable layers of stone. 
That detail has always made the RuBisCO strategy seem farfetched to me. But even then, engineering the enzyme to be a better carboxylase could have a lot to say about feeding humans in a world where climate change increasingly limits crop yields.

Cincydawg

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Re: Weather, Climate, and Environment
« Reply #572 on: August 21, 2018, 02:10:02 PM »
And we have these things called "plants" which already "fix" CO2 as biomass.  All we need to do is plant these plants and then bury the biomass where it will not degrade.

I bet no artificial system is nearly as efficient in use of energy and space.

Cincydawg

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Re: Weather, Climate, and Environment
« Reply #573 on: August 21, 2018, 02:11:03 PM »
When I look at a tree, I marvel at how most of it is water and a minor component extracted from the air.  A very minor component (400 ppm or so).  And the tree manages to turn that into stuff.

 

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