Search found 38 matches

by gs99
Thu Dec 10, 2015 4:46 pm
Forum: Molecular Biology
Topic: Why is TSH reported in mIU/l
Replies: 4
Views: 3170

Re: Why is TSH reported in mIU/l

Thanks, I've read that. To IU: How would you explain IU to a fifth grader, comparing it to grams/liter, for example? Why are certain vitamins measured by IU? To my original question: Why are some hormones measured in IU/l and others by g/l, if a person wants to compare the mass of the two hormones.
by gs99
Wed Nov 25, 2015 5:54 pm
Forum: Molecular Biology
Topic: Why is TSH reported in mIU/l
Replies: 4
Views: 3170

Re: Why is TSH reported in mIU/l

I don't have lab experience. I have lab reports of my blood and am curious why thyroxine hormone is reported as mass/volume but Thyroid Stimulating Hormone is stated in mIU/volume. If this is an international unit, why doesn't anybody know what it is?
by gs99
Wed Nov 11, 2015 5:50 pm
Forum: Molecular Biology
Topic: Why is TSH reported in mIU/l
Replies: 4
Views: 3170

Why is TSH reported in mIU/l

In lab results, Thyroxine (and many others) are reported as mg/dl (mass/volume). But Thyrotropin (thyroid-stimulating hormone, TSH) is reported as mIU/l. (We find IU in the specs of some vitamins.) I read that a report expressed in IU is a "function" test, in contrast to a mass/volume meas...
by gs99
Fri Mar 07, 2014 9:23 pm
Forum: Molecular Biology
Topic: Meiosis prophase I crossover
Replies: 0
Views: 8612

Meiosis prophase I crossover

“Chromosomal crossover (or crossing over) is the exchange of genetic material between homologous chromosomes that results in recombinant chromosomes.” m Question: Due to the multiple layers of winding, how can parts of the chromosome break evenly? Is it possible that the winding mechanism provides c...
by gs99
Tue Jan 10, 2012 12:43 am
Forum: Zoology Discussion
Topic: Cell identification - germ cells in haploid male ants
Replies: 4
Views: 10606

Cell identification - germ cells in haploid male ants

I found it interesting that male ants (and others in that group) are born haploid. I wondered how these cells go thru the processes of mitosis and meiosis. I didn't see a problem with mitosis but don't think meiosis can process haploid cells to produce haploid sperm cells. The male ants obviously ma...
by gs99
Mon Oct 03, 2011 2:03 am
Forum: Zoology Discussion
Topic: Taxonomy differences
Replies: 1
Views: 3179

Taxonomy differences

I've started a study of Genus Equus . I'm finding differences between these three sources: Wikipedia Integrated Taxonomic Information System (ITIS) Mammal Species of the World (MSW) For example, Wikipedia has Subgenera; the others do not. MSW has Subspecies that ITIS does not. Wikipedia has subspeci...
by gs99
Thu Mar 31, 2011 10:19 pm
Forum: General Discussion
Topic: Biological taxonomy - question about genus
Replies: 1
Views: 1738

Biological taxonomy - question about genus

A specific question is - can members of different genus have offspring? For example, family Felidae has 14 genus, including Felis (housecat) and Panthera (lion, tiger, jaguar, leopard). Obviously Felis and Panthera cannot mate, but is there something that prevents cats of similar size from different...
by gs99
Mon Feb 15, 2010 2:54 pm
Forum: Molecular Biology
Topic: Generation of DNA nucleotides
Replies: 65
Views: 83934

Re: Generation of DNA nucleotides

any of us is saying, that we reached limit of all learning What does "any of us is saying" mean? More sensible (to me): "None of us are saying that we reached limit of all learning". some things are a little behind the Universe laws as we know them nowadays... If you mean "...
by gs99
Sat Feb 13, 2010 12:11 am
Forum: Molecular Biology
Topic: Generation of DNA nucleotides
Replies: 65
Views: 83934

Re: Generation of DNA nucleotides

You're saying we have reached our limit of learning and developing new things?

Haven't we been at this crossroads before?

Don't worry that we don't have the answer right now; it will come.
And the law of conservation will not be broken.
by gs99
Fri Feb 12, 2010 2:45 pm
Forum: Molecular Biology
Topic: Generation of DNA nucleotides
Replies: 65
Views: 83934

Re: Generation of DNA nucleotides

Those who invent and discover seem to go beyond "limitations": Years ago, the staff at Bell labs discovered a way to have more than one conversation on a telephone wire! I have a complete motion picture stored on a small piece of plastic; I can play it on a computer at home! At this point,...
by gs99
Thu Feb 11, 2010 6:43 pm
Forum: Molecular Biology
Topic: Generation of DNA nucleotides
Replies: 65
Views: 83934

Re: Generation of DNA nucleotides

When glass was discovered 2000 years ago, it paved a way to the common microscope. When Alexander Bell made the first telephone, he probably didn't envision the sound wave being digitized. Yet the sounds we make on the phone are broken up into tiny parts and then reassembled, enabling many conversat...
by gs99
Wed Feb 10, 2010 6:27 pm
Forum: Molecular Biology
Topic: Generation of DNA nucleotides
Replies: 65
Views: 83934

Re: Generation of DNA nucleotides

Get ALL the nucleotide triphosphates to the polymerase and let the polymerase and template strand sort them out. Sounds like a plan! Thanks for all the replies by everybody. It's been very informative and interesting. Lots more to learn. One day we might have a microsope that will show all this in ...