dnamolecules

[dnamolecules]

Very informative.

(photo by scientistintraining)

A few weeks ago I did an Eldoncard home kit, or a home blood test, to see what blood type my boyfriend is. Turns out he’s O+ and he wasn’t very happy with that, since O+ is the most common blood type in Caucasians. 

The ABO system classifies blood into four major blood groups. These blood groups are determined by the presence or absence of two antigens – A and B – on the surface of red blood cells:

Group A – only the A antigen is present on red cells (and B antibody in the plasma)

Group B – only the B antigen is present on red cells (and A antibody in the plasma)

Group AB – has both A and B antigens on red cells (but neither A nor B antibody in the plasma)

Group O – has neither A nor B antigens on red cells (but both A and B antibody are in the plasma)

Rhesus blood groups (or the +/- one often notices next to the ABO blood group) are more complicated than the ABO system, but an important part is the D antigen. 

Rhesus Positive-has the D antigen on the surface of red blood cells 

Rhesus Negative-does not have D antigen on the surface of red blood cells (has D antibody in the plasma)

How the card works:

The card comes pre-treated and impregnated with dried antibody sera Anti-A, Anti-B and Anti-D.

The antibodies will agglutinate with the corresponding antigens if they are present within the blood.

For example, if you have Group A blood the Anti-A field should show agglutination because the antigen on your blood cells reacts with the Anti-A antibody within the circle and forms clumps, or agglutinates.

For group O there shouldn’t be any agglutination within the A or B circles because the red blood cell does not have A or B antigens.

If someone is O+ though, as in the case for my boyfriend, he shows no agglutination in the A or B circles, but there is agglutination in the Anti-D circle because the D antigen is present on his red blood cells so they bind with the Anti-D antibodies within the card. 

[dnamolecules]

Copenhagen by Olivier Wong

[dnamolecules]

Tessa Perlow

[dnamolecules]

Italy by  thererumnatura

[dnamolecules]

LMAOOOOOO

I love the hilarious drawings done by Sketching Science! 

Go and check them all out on Facebook: https://www.facebook.com/sketchingscience.atgc/

[dnamolecules]

Check out this adorable little pipette insect! When you’ve got nothing better to do in the lab. 😂 📷: John L/Pinterest #science #biology #pipette #sciencealert #insect http://ift.tt/2gX8ASg

[dnamolecules]

Some of the most interesting news in biology today!!

Researchers uncover mechanism behind calorie restriction and lengthened lifespan

Almost a century ago, scientists discovered that cutting calorie intake could dramatically extend lifespan in certain animal species. Despite numerous studies since, however, researchers have been unable to explain precisely why. Now, investigators at the Lewis Katz School of Medicine at Temple University (LKSOM) have broken past that barrier. In new work published online September 14 in Nature Communications, they are the first to show that the speed at which the epigenome changes with age is associated with lifespan across species and that calorie restriction slows this process of change, potentially explaining its effects on longevity.

“Our study shows that epigenetic drift, which is characterized by gains and losses in DNA methylation in the genome over time, occurs more rapidly in mice than in monkeys and more rapidly in monkeys than in humans,” explains Jean-Pierre Issa, MD, Director of the Fels Institute for Cancer Research at LKSOM, and senior investigator on the new study. The findings help to explain why mice live only about two to three years on average, rhesus monkeys about 25 years, and humans 70 or 80 years.

Nature Communications (2017). www.nature.com/articles/s41467-017-00607-3

[dnamolecules]

[dnamolecules]

[dnamolecules]

I never delete text messages just in case someone wanna start acting different… like you werent saying that March 21, 2014 at 3:57pm. 

[dnamolecules]

[dnamolecules]

Kitty Date

[dnamolecules]

Be careful who you trust. Roses are beautiful and yet they have thorns.

[dnamolecules]

I need trust in a relationship. You could wait four years to tell me you love me, you could make me wait 10 to meet your mom.  But I want to be the person you tell everything to. I want my word to be above anyone else’s. I want my ears to be your diary. I know I won’t have all of that right away, but I need trust in my relationships.  Without it? It won’t work. End of story.

Taurus, Virgo, Sagittarius, Capricorn, Aquarius, Pisces (via aquariusgod)

[dnamolecules]

</3

[dnamolecules]

<3

For more posts like these, go visit psych2go

Psych2go features various psychological findings and myths. In the future, psych2go attempts to include sources to posts for the for the purpose of generating discussions and commentaries. This will give readers a chance to critically examine psychology. 

[dnamolecules]