Search found 1276 matches

by Darby
Mon Nov 11, 2013 11:26 pm
Forum: Human Biology
Topic: G.I. Problems from Antibiotic Use
Replies: 11
Views: 10205

There's not a lot of distribution from blood to the colonic lumen - it's virtually oxygen-free, the residents live on the contents and not systemic nutrients. I'm sure that some blood-carried materials get in there, but it's not a certainty.
by Darby
Mon Nov 11, 2013 11:23 pm
Forum: General Discussion
Topic: organism
Replies: 2
Views: 1973

Just walking stores and then reuses physical energy.
by Darby
Wed Nov 06, 2013 6:52 pm
Forum: Genetics
Topic: 1 attached, 1 unattached earlobe
Replies: 10
Views: 20043

There is another possibility - some individuals are actually two individuals that merged as embryos: fraternal twins become one person. Parts of the individual are genetically distinct. First discovered, I think, when a CSI investigations decided that a child's mother was actually the aunt (child pr...
by Darby
Wed Nov 06, 2013 6:42 pm
Forum: General Discussion
Topic: Please help me decide which microscope to buy
Replies: 2
Views: 4550

I'm not sure what an inverted microscope is, but if you're looking at unstained cells, some special beam arrangements should be there - phase contrast, dark field, something...
by Darby
Sun Nov 03, 2013 2:59 pm
Forum: Human Biology
Topic: Menopause
Replies: 5
Views: 7592

This is a long way from being settled. The first suggestive test involved moving bone marrow stem cells to ovaries and getting follicle and oocyte cells - instead of deciding that stem cells could generate new tissue to match their environment, the researchers decided that back-up follicle cells wer...
by Darby
Fri Nov 01, 2013 1:31 pm
Forum: Human Biology
Topic: G.I. Problems from Antibiotic Use
Replies: 11
Views: 10205

The basic idea of oral medication is to get it absorbed - like most nutrients, there shouldn't be anything still in the gut by the time it reaches the colon. Of course, this is affected by the pill casing and the binders (an issue with generic versions, which can use different ones). Antibiotics wit...
by Darby
Fri Nov 01, 2013 1:27 pm
Forum: Human Biology
Topic: My “Eureka” moment. A cure for cancer.
Replies: 9
Views: 32169

In some ways, science is a closed-off group, since it takes a lot of training to assess most ideas. Cancer research, from looking at the avenues that people are exploring, is one of the more open-to-anything groups, but I'm not surprised that they don't entertain many ideas from "amateurs."...
by Darby
Fri Nov 01, 2013 12:54 pm
Forum: Evolution
Topic: The Selfish Gene
Replies: 2
Views: 6151

Any entity that can reproduce AND produce variation in "offspring" will tend to evolve, to perpetuate more successful variants. There are DNA "parasites" that copy themselves and spread the copies throughout a genome over generations. I'm not sure that the Selfish Gene is anythin...
by Darby
Tue Oct 29, 2013 10:57 pm
Forum: Human Biology
Topic: G.I. Problems from Antibiotic Use
Replies: 11
Views: 10205

I don't think that the tetracycline was topical, but I also don't think that oral tetracycline persists into the colon (or it's not supposed to). Of course, everybody's different.
by Darby
Tue Oct 29, 2013 10:54 pm
Forum: Human Biology
Topic: My “Eureka” moment. A cure for cancer.
Replies: 9
Views: 32169

Of course, the devil is in the details. A lot of what's being proposed is just a "what if" based on basic properties of cancers - I remember thinking of trying a similar approach when I started my work in parasitology many years ago: what if cancer-aimed parasites could be used? In princip...
by Darby
Mon Oct 28, 2013 12:57 am
Forum: Evolution
Topic: Thinking in terms of evolution
Replies: 4
Views: 6601

Don't try to reduce every feature to advantages - species, especially social ones, are packages, and it's not certain what the driving details might be...
by Darby
Thu Oct 24, 2013 7:26 pm
Forum: Human Biology
Topic: Year 11 Meiosis helpp!!!
Replies: 3
Views: 6874

Without crossing over, though, you are right - there are duplicate pairs.