August312014

finepoints:

wordbomb:

Facebook is spying on your mom, your relationships and your political views

Facebook has been spying on users’ ethnicities, political views, romantic partners, and even how they talk to their children. (Unlike the mood study, the Facebook studies listed below are observational; they don’t attempt to change users’ behavior.)

It’s unlikely Facebook users have heard about most of these studies, they’ve consented to them; the social network’s Data Use Policy states: “We may use the information we receive about you…for internal operations, including troubleshooting, data analysis, testing, research and service improvement.”

Third parties have always existed. Privacy isn’t possible online. Has it ever been? All data is recorded and sifted for algorithmic pattern testing. Intersection cameras are reminders when we’re away from the computer satellites watch over us all. It’s on principle that an individual or organization would defend digital privacy rights.

(via priceofliberty)

August292014
2PM
unmotivating:

Standing tall between a family of Tor Soro fish.

unmotivating:

Standing tall between a family of Tor Soro fish.

(via science-is-real)

2PM
npr:

Ebola has a nasty reputation for damaging the body, especially its blood vessels. But when you look at the nitty-gritty details of what happens after a person is infected, a surprising fact surfaces.
How Ebola Kills You: It’s Not The Virus
Illustration credit: Lisa Brown for NPR

npr:

Ebola has a nasty reputation for damaging the body, especially its blood vessels. But when you look at the nitty-gritty details of what happens after a person is infected, a surprising fact surfaces.

How Ebola Kills You: It’s Not The Virus

Illustration credit: Lisa Brown for NPR

(via nursingisinmyblood)

August172014
eyedefects:

Anterior hyphema, a collection of blood in the anterior chamber.

eyedefects:

Anterior hyphema, a collection of blood in the anterior chamber.

August102014
twisteddoodles:

Growing up.

twisteddoodles:

Growing up.

(via uaortho)

6PM

sixpenceee:

iniquity-incense:

sixpenceee:

Recently there’s been a case of bears walking upright like humans.

There are many theories as how and why a bear would walk bipedally one of them including the bear injured it’s front paws. 

This is the video for the above gifs

You can read about a more recent case here

That would freak me the fuck out if I saw that in the woods.

RISE OF THE PLANET OF THE BEARS!

6PM
sixpenceee:

WHY ARE MOTHS ATTRACTED TO THE LIGHT?
Phototaxis is an organism’s automatic movement toward or away from light. So a cockroach has negative phototaxis, because it’s always scuttling into dark corners while a moth has positive phototaxis because of it’s preference for bright lights.
Why are they attracted to bright lights?
We have several theories but no definite answers. Here are the theories:
Moths use the moon as a primary reference point to travel. So it’s attraction to the light maybe related to that orientation and cause disorientation. 
Moths may see flying towards the light as advantageous and safer than flying somewhere dark. 
Did you know moths are sensitive to ultra-violet light? A white light will attract more than than a yellow one. 
SOURCE & MORE INFORMATION

sixpenceee:

WHY ARE MOTHS ATTRACTED TO THE LIGHT?

Phototaxis is an organism’s automatic movement toward or away from light. So a cockroach has negative phototaxis, because it’s always scuttling into dark corners while a moth has positive phototaxis because of it’s preference for bright lights.

Why are they attracted to bright lights?

We have several theories but no definite answers. Here are the theories:

  1. Moths use the moon as a primary reference point to travel. So it’s attraction to the light maybe related to that orientation and cause disorientation. 
  2. Moths may see flying towards the light as advantageous and safer than flying somewhere dark. 

Did you know moths are sensitive to ultra-violet light? A white light will attract more than than a yellow one. 

SOURCE & MORE INFORMATION

6PM

Surgical operation, 1910 
Surgical operation, 1910 

(Source: dropboxofcuriosities, via beegoestomedicalschool)

5PM

teded:

How Tattooing Really Works

1. Tattooing causes a wound that alerts the body to begin the inflammatory process, calling immune system cells to the wound site to begin repairing the skin. Specialized cells called macrophages eat the invading material (ink) in an attempt to clean up the inflammatory mess. 

2. As these cells travel through the lymphatic system, some of them are carried back with a belly full of dye into the lymph nodes while others remain in the dermis. With no way to dispose of the pigment, the dyes inside them remain visible through the skin. 

3. Some of the ink particles are also suspended in the gel-like matrix of the dermis, while others are engulfed by dermal cells called fibroblasts. Initially, ink is deposited into the epidermis as well, but as the skin heals, the damaged epidermal cells are shed and replaced by new, dye-free cells with the topmost layer peeling off like a healing sunburn.

4. Dermal cells, however, remain in place until they die. When they do, they are taken up, ink and all, by younger cells nearby so the ink stays where it is.

5. So a single tattoo may not truly last forever, but tattoos have been around longer than any existing culture. And their continuing popularity means that the art of tattooing is here to stay.

From the TED-Ed Lesson What makes tattoos permanent? - Claudia Aguirre

Animation by TOGETHER

5PM
5PM
5PM

thelifeofapremed:

Post-Transcriptional Processing

Only in the Nucleus for Eukaryotes
Primary transcript processed in 3 ways:
1. ADDition of nucleotides
2. DELETion of nucleotides
3. Modification of Nitrogenous Bases
5’ cap and 3’ Poly A tail
snRNP and the Spliceosome of Doom!
INtrons = IN nucleus
EXtrons = EXit the nucleus

DNA TECHNOLOGY

Clone Library = plasmid and replication

Polymerase chain reaction (PCR) : ‘fast’ cloning

Heat to denature
Mix with primers, let cool = primers hybridize
Add polymerase to amplify complementary strands

Southern Blot

1. Chop up DNA
2. Efield to spread out pieces by SIZE
3. Blot it!
4. Add Radioactive DNA or RNA Probe
5. Visualize on radiographic film 
GENETIC CODE
Degenerative – more than one series of nucleotides may code for ANY A.A.
Unambigous = one series of nucleotides = one A.A.
Universal code!
START! AUG
STOP! UAA, UAG, UGA
4^3 = 64 
Ex. protein of 100 A.A. = there are 20^100 possible amino acids sequences for the protein 

(via medicalwatson)

5PM
medicalschool:

A human dendritic cell (blue pseudo-color) in close interaction with a lymphocyte (yellow pseudo-color). This contact may lead to the creation of an immunological synapse. The image was obtained using a field emission scanning electron microscope.

medicalschool:

A human dendritic cell (blue pseudo-color) in close interaction with a lymphocyte (yellow pseudo-color). This contact may lead to the creation of an immunological synapse. The image was obtained using a field emission scanning electron microscope.

(Source: download.cell.com, via medicalwatson)

5PM
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