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Liquid Crystal Rodeo

Liquid Crystal Rodeo

Scientists have achieved an unprecedented level of control over defects in liquid crystals that can be engineered for applications in liquid matter photonics. They can lasso an intangible ring created out of liquid crystal defects - attaching a microsphere to a long thin fiber using optical tweezers. 
Liquid crystals are familiar to us from their application in LCD screens. What makes them so interesting is that they are rich in defects. Thanks to advances in manipulation tools such as optical tweezers, the authors were able to create an arbitrary number of defect pairs on a long thin fibre plunged into a nematic liquid crystal - an ordered fluid with long organic molecules all pointing in the same direction like sardines in a tin.

Swirling Currents Deliver Phytoplankton Carbon To Ocean Depths

Swirling Currents Deliver Phytoplankton Carbon To Ocean Depths

Crocus and daffodil blossoms mean spring has arrived on land and a similar "greening" event, a massive phytoplankton bloom, unfolds each spring in the Atlantic Ocean.
But, what happens to all that organic material produced in the surface ocean? 

ZS-9 Normalizes Blood Potassium In 98 Percent Of Kidney Patients

ZS-9 Normalizes Blood Potassium In 98 Percent Of Kidney Patients

Patients with chronic kidney disease may be treated with a class of medications called Renin Angiotensin Aldosterone System inhibitors (RAASI's) but though they protect the heart and kidney, a significant percentage of patients develop a dangerous side effect; high potassium levels in the blood, a condition known as hyperkalemia. 
Elevated potassium puts patients at risk of death from cardiac arrhythmias. Lacking a drug to treat the problem, doctors either stop these beneficial drugs or may use kidney dialysis to quickly lower the potassium.

High Intensity Exercise Before A Fatty Meal Is Best For Vascular Health

High Intensity Exercise Before A Fatty Meal Is Best For Vascular Health

A short burst of intensive exercise before eating a high-fat meal is better for blood vessel function than the currently recommended moderate-intensity exercise, at least in young people.
Cardiovascular diseases including heart attacks and stroke are a leading cause of death and the process underlying these diseases start in youth. An impairment in the function of blood vessels is thought to be the earliest event in this process, and this is known to occur in the hours after consuming a high fat meal. 

Beta Secretase Inhibitors For Alzheimer's Disease

Beta Secretase Inhibitors For Alzheimer's Disease

With each new amyloid-targeting treatment for Alzheimer's disease that has been developed, there has been a corresponding concern about antibodies targeting amyloid-β peptide (Aβ) producing inflammation in the brain in some patients.
Gamma secretase inhibitors tend to produce adverse effects by interacting with Notch, an important pathway for cellular signaling. 

Aristotle's Answer: Why Some Mushrooms Glow

Aristotle's Answer: Why Some Mushrooms Glow

Thousands of years ago, Aristotle knew that some mushrooms glowed, so it is no surprise the great thinker wondered why.Science may finally have an answer for his question. A new study posits that the light emitted from those fungi attracts the attention of insects, including beetles, flies, wasps, and ants. Those insect visitors are apparently good for the fungi because they spread the fungal spores around. The new study also shows that the mushrooms' bioluminescence is under the control of the circadian clock. In fact, it was that discovery that led the researchers to suspect that the mushrooms' light must serve some useful purpose.

Facial Features Shape  First Impressions - And That Can Be Manipulated

Facial Features Shape First Impressions - And That Can Be Manipulated

A  recent paper discusses shows how rapidly formed first impressions that influence our subsequent behavior towards that person can be accurately predicted based on the physical features found in everyday images of faces, such as those found on social media. The impressions we create through such images are important in a world where we increasingly get to know one another online rather than in the flesh. 

Antibodies From Camels May Protect Humans From MERS

Antibodies From Camels May Protect Humans From MERS

Middle East Respiratory Syndrome (MERS), which emerged in humans last year in the Saudi Arabian peninsula, causes severe respiratory disease, with a mortality rate of 35 percent. No specific therapy is currently available. 
Passive immunization, a procedure where you inject a former patient's antibodies into a new patient to fight the disease, has been used in the past, including last year in a small number of cases of Ebola, but in the case of MERS, few former patients are available to donate antibodies. Additionally, their antibody titers are often too low, and many former patients are not healthy enough to donate.

The Science Of Stress

The Science Of Stress

It's supposed to help keep our bodies healthy in stressful situations. But the constant stress of our everyday lives means we're getting overexposed to cortisol. Raychelle Burks, Ph.D., explains why too much cortisol is bad for you in the latest episode of the Reactions series Get To Know A Molecule.

Roll Up Your Computer Screen And Stow It Away - Thanks To DNA

Roll Up Your Computer Screen And Stow It Away - Thanks To DNA

Display screens are everywhere but convenience needs are going up, not down, and people are wanting to break free of rigid monitors. The race is on to develop computer displays that can be easily rolled up and put away rather than requiring a flat surface for storage and transportation.A new study suggests that a novel DNA-peptide structure can be used to produce thin, transparent, and flexible screens. The research, conducted researchers at Tel Aviv University, harnesses bionanotechnology to emit a full range of colors in one pliable pixel layer, as opposed to the several rigid layers that constitute today's screens.

Global Warming Not Causing Pine Beetle Outbreaks

Global Warming Not Causing Pine Beetle Outbreaks

Warming winters may be linked to mountain pine beetle outbreaks in the coldest areas of the western United States but the causes are multi-faceted, according to a new U.S. Forest Service study.