Re: Microbes Affinities?On Sep 3, 7:50 am, Captain Trips <usenet...@uni-muenster.de> wrote:
> GS wrote:
> > "Kumar" <lordshiva5...@gmail . com > wrote in message
> >news:1188657052.246954.79830@22g2000hsm.googlegroups . com ...
> >> On Sep 1, 5:00 pm, "GS" <n...@home . com > wrote:
> >>> "Kumar" <lordshiva5...@gmail . com > wrote in message
>
> >>>news:1188645017.705440.100350@r34g2000hsd.googlegroups . com ...
>
> >>>> Hello,
> >>>> Whether specific microbes are attracted to specific chemicals/
> >>>> substances?
> >>>> If we dissolve any salt or other substance in water and keep it in
> >>>> open for 5 to 30 minutes, some microbes from surrounding environment
> >>>> can be attracted.
> >>>> Whether those microbes will be salt/substance specific or all type of
> >>>> microbes in surrounding will be attracted and pollute water?
> >>>> Best wishes.
> >>> Generally, microbes don't move large distances by themselves (large
> >>> distances in microbial terms being in the millimetre range)- they get
> >>> dispersed by other factors (wind, water droplets, sneezing and coughing)
> >>> and
> >>> they tend to be attached to other things (eg skin flakes, dust). What you
> >>> will have in your sample after environmental exposure will be whatever
> >>> has
> >>> fallen into it. If that includes microbes, then the substance in the
> >>> water
> >>> might influence whether they can survive or grow - not much will grow in
> >>> 70%
> >>> ethanol in water, but quite a few things might like 1% glucose in water.
>
> >>> Some moulds have dispersal mechanisms that eject spores for distances of
> >>> 1 -
> >>> 2 mm, enough to get through the boundary layer round the object they're
> >>> on -
> >>> which allows better wind dispersal (look up "Sporobolomyces" for more
> >>> information.)
>
> >>> GS
> >> Thanks. I thought they can move towards their liking material and
> >> pollute.
>
> > Some microbes can move in liquids and have structures (cilia or flagella)
> > that propel them. The distances they move are typically very small. Some
> > microbes (like fungi and slime moulds) can respond to chemicals by growing
> > toward or away from them. But nothing I know of can move by itself across
> > the distances you're discussing.
>
> > GS
>
> The source of that may be the water itself. If you put some salt, sugar
> etc. in it, it will begin to flow. With the starting dissolution of the
> salt there will be a concentration gradient. The water will flow to the
> site with the higher concentration of the salt and the microbes will
> move with the stream.
> Maybe that it what you have seen?- Hide quoted text -
>
> - Show quoted text -
To think it in another way, few microbes can remain present in water
either polluted or polluted from environment. In salt water dilution,
can they die and add their contents to which they are composed, in
water or otherwise increase concentration of NaCl in water?