/sci/ - Science & Math

>>15198917

In the primordial stage of the earth's biological development... where the planet was covered with slime with single-celled organisms evolving in it (our ancestors) we were somewhat limited in our ability to move in the physical world. Probably at first we couldn't really move. Maybe we could "grow" in a particular direction. Then we would have evolved into single celled organisms with the ability to move, pic related. Progress..

>>9322661
Currently studying drug and medicinal products at lit damn small class

>>8283244
>WHEN they are harmful for our health
When they get where they shouldn't be inside your body in significant numbers to colonize. Gram negative bacteria will make you feel ill if you ingest enough as their cell wall contains a component that is recognized as toxic.
How many bacteria it will take to make a person ill would depend on the general health of the human, so it varies.

>>8283244
>How much of them does normal soap remove?
Not perfect, but washing vigorously with soap will greatly reduce the number and chance of infection.

>>8283244
>How much does alcohol disinfectant remove?
It's less effective in practice as alcohol gels are not made to be washed away like soap. Better to wash with warm water and soap if possible. Better yet is bleach on counters, workstations, etc.

>>8283244
>How far does bacteria spread out and how long does it survive on an inorganic surface?
How far a bacterial colony spreads is dependent on factors like how hospitable the environment is to that organism, motility, generation time, etc.
Some bacteria (Genera Bacillus and Clostridium) can produce endospores that will allow them to stay in a hibernation-like state practically indefinitely.

>mfw immunology

>>7906494

Any med or biology majors here ? I've got a few questions. I'm not a biology major so don't expect these questions to be educated.

1 ) I know alcohol kills bacteria, does it kill viruses as well ?

2 ) If you have some sort of skin infection, would it help to soak the infected part in vodka for about 10 minutes, would it help ?

3 ) Since most bacterias feed on sugar, and they can mutate their cell walls to stop anti-biotics from getting in, is it possible to incorporate sugar with antibiotics to trick them into absorbing it ?

Thanks

do they feel pain?

>>7097631
Lots of microbes. I'm just now getting in depth into the molecular aspects in physiology and immunology. Otherwise is just microbial interactions and processes. Labs are fun though.

>I just don't have enough practical experience to know what I'd really prefer.

That's pretty much why I'm doing masters. Research seems pretty rigorous so I might look at other options

>>6943721

>>6901850

Yes this shit actually looks like that. It's called Molecular Machine or Nano bio technology.

Understand and be able to copy this is one of the big goal of biology.

Biology is really the god tier of science.

How can something be born with knowledge that isn't actually learnt or taught? How does a baby know how to suck on a nipple before it's had the chance to look around and notice other babies doing so? How do spiders know how to spin perfect webs without being raised to do so? etc. Surely this knowledge is somehow placed into DNA? What then decides specifically what knowledge is and isn't placed in DNA and how ?

Or could it be random mutations in DNA that gives random sometimes complex impulses to things? And the random impulses that work allow the survival and replication of that thing. If so that could mean that series killers and the like could have gotten their impulses to kill through random genetic mutations

Can anyone explain?

It's like cops and robbers!

this gif always makes me smile

How the fuck does something like the DNA enyzme which 'unzips' DNA and the enzyme that 'proof reads' nucleotides and clicks them into place possibly evolve into existance? I can understand more simple evolution such as defences etc but how can you explain something such as this?

Hello /sci/. I usually post on /pol/, /int/ and /ck/.
I've just read a book that blew my mind: "Biocentrism" by Robert Lanza. I'm not sure if my conclusions are correct, but he basically says we create the universe by observing it.

A couple of things really made me wonder. The first is that old question:
>If a tree falls in a forest and nobody observes it, does it make a sound?
The answer is "No". Sound is a sense perception that requires a listener.

The second is about rainbows.
>If there is no observer to see a rainbow, then it cannot exist.
It's just water droplets falling in a certain way through light viewed by a conscious being. It has no existence without an observer.

I'll dump science related pic and gifs in the hope of a discussion about this.