Recent content by PVastro

Hmm I see. Well trees go dormant during the winter (as with most plants) so perhaps some of the metabolic changes the tree undergoes in order to prepare for producing new leaves in the spring causes some movement in the sap channels of xylem. But as I stated earlier sap is generally referring to...

How they did it is something that you can only do with plants. Since all plant cells are totipotent (think stem cells) you can take anyone cell from it and develop it into new functioning plant tissue from that one cell. It pretty amazing that they found one with cells intact enough to replicate...

Well from what I know about Xylem, it moves water in a passive transport (meaning it doesn't require energy) and is simply a matter of water evaporating through the leaves and the water molecules pulling each other in a "train" up through the plant. As for sap, that is generally (depending on...

Well we do alter DNA all the time with things like plants for food. Some plants even have insect and bacteria DNA put into their genetic sequence.

I see I should have worded it better. I was saying nuclear reactions because that what causes all the energy, but i really just meant would the star itself make any noise, nuclear reactions was just a lazy way of putting thank you though.

Also i think I should add about how the angle of where the light is hitting your reflector will greatly affect the image quality through your camera. So if you go with something like a reflective hood (or any other surface/material) you will have to experiment and compensate for the different...

Like I said its all about how smooth the surface along with how reflective it is. Its really tricky to get reflective films to have the photographic clarity you are looking for in a camera image, especially when you are bending or wrapping it 360 degrees. You might want to look around for...

Would you "Hear" a Stars Nuclear reactions if you were close to it? Hey all, This is more of a thought problem, but last night I was wondering about what it would be like to see a star up close (relatively speaking). Since stars are essentially a massive nuclear chain reaction you would think...

As I understand it when it concerns something having the ability to "reflect" and image like a mirror does, it has to do with how smooth the surface area is. While metals are generally very reflective due to this, things like glass(crystalline structured) work well for reflecting because they...

That could work I suppose, I don't know if its been processed as a bio-plastic before, and it has some of beneficial properties for what I am looking for (UV, and water resistance), although from what I've researched it supposedly decomposes faster than cotton, so I am not sure how it would hold...

Since it was intended to simulate Rockwool it would most likely be hydroponically, and while it may differ from plant to plant (as far as root absorption capacity) its pretty much safe to say that if a chemical or trace element is in the growing medium the roots will most likely absorb it.

Hey all, I have another horticulture question, this time concerning the practical use of bio-degradable pots. While plastic pots are very common and effective (due to the fact that they do not degrade, versatile options for shape/construction, ect.) yet they are petroleum based and with my...

I think what he meant is that what how one would dispose of these carcinogens once they are extracted would be harmful, as in would you just "throw them away" or could that have an impact on the environment depending on how it is stored/cleansed. But your solvent solution might have some merit...

I see well I think I understand it better but when you say it bounces and retraces its path geometrically (at least as far as I can "picture it") it suggests that it partially goes in it and then goes back out the exact same path or more more "mirroring" its own path as it travels through the...

Thanks the wiki article helped sum it up fairly well as well as your last statement... unfortunately due to my incredible lack of understanding of math (especially particle physics) your posted formulas completely escape me sorry :rolleyes: . But when you mean a tachyon can bounce back out due...