Home Away From Home?

At the recent Search for Life Beyond the Solar System conference in Arizona, it was announced that an Earth-sized planet had been found orbiting a star’s habitable zone. Thomas Barclay, a NASA astronomer, looked at data collected by the Kepler telescope to determine the characteristics of this planet. However, he’s been quiet about the details, waiting until his research is published.

Area in Kepler Telescope’s Range of View (Source: NASA)

At least we know the important part: it orbits in the habitable zone. Many scientists believe that liquid water is necessary for life to exist and while this may an Earth-centric view to take, so far it seems like liquid water is most associated with life.  While we don’t know if there is water on this planet, we know that its distance from its host star means that it’s cool enough for water to condense yet warm enough for it to not freeze.

The second most important part is its size: its relatively small size (1.1 times the radius of Earth) among all the exo-planets detected means that it’s the first Earth-sized planet to be found orbiting a star’s habitable zone. While we are not exactly sure how dependent life is on gravity, it bodes well for the possibility of life if a planet has the similar characteristics as that of the only planet known to host life.

While a minimal amount of details are known to those outside of the conference, we do know that the star the planet orbits an M1 Dwarf, also known as a Red Dwarf.

Artist’s depiction of a Red Dwarf (Source: Wikipedia)

These stars are very small and their masses range from the bare minimum needed for star formation to half that of the Sun. They are also the most common star in the Milky Way.

We also know that there are at least five other planets that are in orbit around this dwarf.

However, it’s probably best to ease up on the speculation and wait until the research is published: when we know more about the planet, then we can continue to consider what this discovery means for the search for life on other planets.

– Nicholas MacDonald

A pill could cure jet lag

painful jet lag source: atomictoaster

The symptoms of a jet lag can be quite varied depending on the amount of time zone alteration. These conditions may last several days. Researchers at the Sleep Research Centre in the University of Surrey ,U.K., discovered that disrupted sleep cycles associated with shift work and jet lag have negative effects on the human health including diabetes and obesity, especially those who travel often due to work .These serious diseases become fatal when the body’s clock is out of sync for extended periods of time. One previous study discovered that jet lag damages the body because significant genes are not switched on. Additionally, the risk of heart attacks and strokes increases by more than 40%.

 

Fortunately, Dr. David Bechtold could possibly lead to an invention of a pill that inhibits the enzyme, CK1epsilon in humans.  Lacking CK1epsilon could adjust to a new light-dark cycle much faster than normal making one cope better when lights are turned on and off at times contrast to their natural day-night pattern. Thus, a pill that inhibits the enzyme could help the body’s clock adapt to sudden changes, assisting people to recover from a jet lag rapidly. These drugs will be available in approximately five years.

 

source: http://www.cbc.ca

 

The Invisible Cold War: Bacteria Vs. Humanity

We are in a constant war and we don’t even realize it. No, it’s not the recent development in Ukraine or the crisis in Syria some time ago. It’s something much more subtle and dangerous. As you may have guessed it from the title, we are constantly fighting against bacteria with a type of weapon called antibiotics. Antibiotics are natural products used to kill bacteria by interfering with bacteria growth or replication. Unfortunately, we have been using our weapon inappropriately and now we are steadily losing this fight against bacteria.

Face of Danger (antibiotic-resistant bacteria, MRSA, at work. Image source: wikimedia)

However, researchers from the division of Healthcare Quality Promotion at the U.S. Centers for Disease Control and Prevention (CDC) found something we can do to fight against bacteria. According to the study done in 2013 by Fridkin, S.K. and Srinivasan, A. (associate director for Healthcare Associated Infection Prevention Programs), by fusing antimicrobial stewardship with their strategies, hospitals in the U.S. is able to create a sort of benchmark for all hospitals to follow (2014). This is necessary as there is no clear guideline about how much of antibiotics is “too much.” In order to do this, they went through a trial and error of implementing sound decisions and comparing outcomes within 200 hospitals in U.S..

Now, here is why you might be asking why this is necessary at all when antibiotics can kill bacteria and have been doing so for the longest time. That is only half right. While we have been killing bacteria with antibiotics, they have been evolving through exposure of antibiotics and have become immune to them. As they become immune to the only weapon we have against them, we are forced to create or modify the antibiotics. This is called, “evolutionary arms race.”

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While manufacturing new antibiotics would be good and all, there has been reports of misuse of antibiotics in hospitals and other medical centers as early as late 1950’s which resulted in rise of antibiotic-resistant bacteria (Fridkin, S.K. & Srinivasan, A., 2014). If this faulty practice continues, all the effort and money went into producing antibiotics would be in vain as they would develop immunity again due to overexposure. Therefore, a new practice of controlling distribution of antibiotics called, “antimicrobial stewardship,” has been developed.

Just like how it is not wise to show all your cards in your hand during a poker game, it is not wise to show every antibiotics we got by misusing them. While this study proves that we can set a guideline for all hospitals to follow, it also supports further improvements over their strategies. To prevent a certain future where no cure exists to fight against lethal bacteria, I believe there should be more improvements on the guidelines and if possible, we as citizens should also be smart about our usage of antibiotics.

References

Fridkin, S. K., & Srinivasan, A. (2014). Implementing a strategy for monitoring inpatient antimicrobial use among hospitals in the united states. Clinical Infectious Diseases, 58(3), 401-406.

– Jong Hwan Seo

 

Are you Emotionally Intelligent?

Drawing by Roy Blumenthal on Flickr

Some people may argue that emotional intelligence (EQ) is more important than one’s intelligence (IQ). In fact, psychologists generally agree that among the ingredients for success, IQ counts for roughly 10% (at best 25%); the rest depends on everything else — including EQ. EQ allows for people to read other’s physical or emotional signals and react to it appropriately. This is particularly important in the twentieth century, where being able to empathize, understand, negotiate with others and understanding yourself.

Your EQ is the level of your ability to understand other people, what motivates them and how to work cooperatively with them,” says Howard Gardner, the influential Harvard theorist.

Evidence has been shown that trait EQ predicts job performance and job satisfaction and other career success. Fear not, unlike IQ, EQ can be improved over time so long as one actively understands the basis of EQ.

Your EQ can be measured by 5 different categories: self-awareness, self-regulation, motivation, empathy and social skills.

1) Self-awareness is the ability of knowing what kind of emotion you are experiencing as it “happens,” it relies heavily on how you evaluate your emotions. Not only is it important to know your emotions, but knowing yourself; your self-worth and capabilities.

2) Self- Regulation is has a mutual partnership with self-awareness because once you’ve identified what emotions you are feeling, the next step is: how do you deal with the situation effectively? Emotionally intelligent people have the ability to alleviate emotions such as anger, anxiety or depression by looking at the brighter side of the situation, taking a long walk, meditation, praying…etc. Self-regulation involves being able to manage impulse disruptive emotions, maintaining standards of honesty and integrity, taking responsibility, being flexible of the situation and being innovative.

3) Motivation is driven by setting clear goals to negate disruptive emotions. Write your goals down on a piece of paper, make it visual and make a conscious effort to strive for change. Motivation consists of having determination, committing to your goals, and having a positive attitude despite obstacles and setbacks.

4) Empathy is the ability to understand how people feel. Being able to read the feelings behind someone’s signal will allow you to control your thought and feelings as well. An empathetic person is able to anticipate sense and recognize needs, they have political awareness – able to read a group’s emotional currents and power relationships, and most importantly, they understand what others need.

5) Social Skills are important in our society because it allows you to effectively negotiate, understand and empathize with others. Social skills focus on: effective persuasion, clear communication, leadership, initiating or managing change, resolving disagreements, nurturing relationships, being a team player, creating group synergy.

How emotionally/socially intelligent are you? Take a test:

http://kgajos.eecs.harvard.edu/mite/

– Cynthia Lung

A peice of history: the oldest known material on Earth

In Australia, on a sheep ranch just 600 Kilometers of Perth, a group of Scientists have just found the oldest known material on Earth.  The zircon crystal is extremely tiny, appearing as a single isolated grain. John Valley, a University of Wisconsin geoscience professor who led the research, used a dating technique called atom probe tomography to accurately date the crystal to an age of 4.4 billion years.

Zircon Crystal (Reuters)

Jack Hills, the region where the crystal was found (earthobservatory.nasa.gov)

In the past, the standard technique for dating materials  was a method called uranium-lead dating.  This method used the radioactive decay of uranium into lead, which one could then use to determine a materials age using half-lives. This would proved extremely useful for zircon dating as their crystalline formation tends to accumulate uranium.

However, some skeptics have argued against the accuracy of the method, as uranium and lead can be known to move around or even escape the zircon crystals through radiation damage. “If there’s a process by where lead can move from one part of the crystal to another place, then the place where lead is concentrated will have an older apparent age and the place from where it moves will have a younger apparent age” Valley said.

Timeline of the history of Earth. For perspective the formation of the earth was at 4.5 billion years while the Jack Hills Zircon was determined to be 4.4 billion years old. (Sydney Morning Herald)

In an attempt to end the debate, John Valley and his group determined the age of the zircon crystals through another technique. The technique, atom probe tomography, is a material analysis technique that gives extensive information about a material such as chemical composition with extreme accuracy.

By using atom probe tomography, the group of researchers managed to examine areas of the crystal with a length as small as 10 nm. At such distances, the effects of uranium-lead movement would be negligible.  As a result of their efforts, Valley and his group have confirmed that the zircon crystal was indeed 4.4 billion years old, hopefully quelling some of the argument.

Link to the Paper:

http://www.nature.com/ngeo/journal/v7/n3/full/ngeo2075.html

 

Felix Tang

5-Second Rule Backed Up by Science?

You have your favourite snack in hand and you’re about to eat it when an arbitrary gust of wind, an evil little leprechaun, or maybe just your own clumsiness causes you to drop it. Darn it! But nonetheless you pick it up, gently blow it off,  and eat it knowing that the “five second rule” is on your side. Or is it?

The Five Second Rule. Image: Pengo (Wikimedia Commons)

 It’s been an age old edibility debate but a new study from a team of students led by microbiology professor Anthony Hitlon at Aston University tells us that the five second rule holds true. They observed the transfer of E.coli and Staphylococcus aureus bacteria from a variety of indoor floor types (carpet, laminate, and tiled surfaces) onto a variety of foods (toast, pasta, cookies, ham, and most ominous, a “sticky dessert”).

 Their findings showed that food picked up just a few seconds after being dropped is less likely to contain bacteria than if it is left for longer periods of time. Therefore, time is a significant factor in the transfer of bacteria from a floor surface to a piece of food. But it’s not just the clock ticking while your meal is on the ground, the type of flooring also comes into play. For example, bacteria was least likely to transfer from carpeted surfaces and most likely to transfer from laminate or tiled surfaces to moist foods when in contact for more than 5 seconds.

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But I think you might want to take this with a grain of salt, and not the ones you’ve dropped on the floor either. Because Hilton notes “consuming food dropped on the floor still carries an infection risk as it very much depends on which bacteria are present on the floor at the time; however the findings of this study will bring some light relief to those who have been employing the five-second rule for years, despite a general consensus that it is purely a myth”. So the next time you drop a delicious snack, you can now breathe a sigh of relief that the five-second grace period has your back.

Written by: Sophia Hu

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Further reading:

http://gizmodo.com/the-five-second-rule-is-now-supported-by-actual-scienti-1542466695

http://www.forbes.com/sites/alicegwalton/2014/03/14/amazingly-science-backs-5-second-rule-for-dropped-food/

http://www.nhs.uk/Livewell/homehygiene/Pages/does-the-five-second-rule-really-work.aspx

http://www.sciencedaily.com/releases/2014/03/140310102212.htm

 

Aerosols and Monsoons: a shorter relationship than previously thought

A man is seen walking in the heavy rains that happen during monsoon season. Source: Flickr Commons, Kamaljith K V

 

 

 

 

A team of researchers put together by V. Vinoj has recently discovered a short-term relationship between the amount of tiny particles in the air in West Asia, the Arabian Sea, and the Arabian Peninsula and the intensity of the monsoon rains over India. As people who live on the West Coast, we are very familiar with rain and lots of it; however we have no experience with monsoons and might not even know what it is.

A monsoon is changes in the wind and pressure systems that result in a dry and wet season. Many countries  including India, Sri Lanka, Bangladesh and Myanmar experience these monsoon seasons. These monsoons bring severe downpours in April to September and dry months the rest of the year. As you can imagine, the people in these countries count on the monsoons for important things such as watering their crops and running hydroelectric dams, which all affect the economy. The video below discusses the Effects of Monsoon Season on India in more detail and with maps.

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Like all atmospheric and environmental science issues, there are many factors that can affect the monsoons. These include wind speeds, surface temperatures, the amount and type of aerosols, cloud type and the amount of clouds in the air. (Vinoj et al. ) As Andrew Dessler so eloquently explains, “Aerosols are particles so small that they do not fall under the force of gravity, but remain suspended in the atmosphere for days or weeks.” Aerosols can be anything from soot (black carbon) to sulfur liquid drops (Dessler 87-91).  In the recent study mentioned above, aerosols were solely studied and found to have a positive correlation between the intensity of the rain in India a week later.

The study by V. Vinoj found that two types of aerosols definitely have an effect on the intensity of the rain. These aerosols are more familiar, one being dust (picked up by winds in the desert) and the other being sea salt aerosols (picked up by winds over the ocean and/or seas).

Here is a sand storm passing over a road. It is easy to imagine how some of the sand can end up staying in the atmosphere after storms like these. Source: Flickr Commons, Jason Rogers

The research project, using a variety of both real life data of aerosol levels and rain levels (in relation to the region’s average) and computer simulations, found there to be a positive correlation between high levels of dust and sea salt aerosols over the Arabian Sea and the intensity of the Indian Summer Monsoon. A positive correlation means the higher the levels of aerosols, the more intense the rain will be. This is a short-term relationship as it found this relationship to take place over a week.

This study is unique as most studies that examine Monsoon-Aerosol relationships are interested in the longer-term effects. It reveals that on top of aerosols having a longer-term effect (due to their ability to change cloud composition), they also have a direct, almost immediate (a week is not very long when compared to months) effect on the monsoons as well.

~Claire Curran

Works Cited

Dessler, Andrew. “Aerosols.” Introduction to Modern Climate Change. New York, NY, USA: Cambridge University Press, 2012. 87-91. Print.

Vinoj, V., et al. “Short-Term Modulation of Indian Summer Monsoon Rainfall by West Asian Dust.” Natural Geoscience advance online publication (2014/03/16)Print.

The sweet solution to antibiotic resistant bacteria

It has been known for some time now that honey has several antibacterial properties, having been employed by many ancient civilizations as a topical treatment for wounds. Honey is an effective treatment against antibiotic resistant bacteria because it effectively attacks bacteria on multiple levels having hydrogen peroxide, acidity, osmotic effect, high sugar concentrations and polyphenols in its arsenal to kill bacterial cells. This makes it very difficult for bacteria to develop resistance to all of the effects of honey simultaneously.

Honey (Image Source: Wikimedia Commons)

Dr. Rowena Jenkins and her team from the University of Wales Institute – Cardiff looked at the antibacterial properties of honey on bacteria that infect wounds. They determined that it wasn’t only the sugar present in honey but other factors that helped kill the bacteria. In their experiment they noticed that one particular protein, called FabI, was entirely missing after the honey treatment. This protein was particularly responsible for fatty acid biosynthesis and without it bacteria couldn’t produce the lipopolysaccharides that are essential to build bacterial cell walls. However they could not isolate which particular element of the honey was responsible for completely destroying the protein.

Another research paper, published the year following Dr. Jenkins work, in the Federation of American Societies for Experimental Biology (FASEB), isolated the protein which was responsible for most of the antibacterial properties  of honey as defensin-1. This protein, the researchers proposed, is added to the honey by the bees that make it and is part of their immune system. Further research into this protein could pave the way to finding treatments that bacteria cannot develop resistance to and even kill antibiotic resistant bacteria.

Honey Bee (Image Source: Wikimedia Commons)

Additionally, Professor Rose Cooper from the University of Wales Institute Cardiff has experimented on the interactions between three types of bacteria and honey, concluding that honey could even have an effect that reverses antibiotic resistance. One of the bacteria she was studying, Meticillin-resistant Staphylococcus aureus (MRSA), was shown to become more sensitive to the antibiotic oxacillin when used together with honey. This brings about the proposition that antibiotics should be coupled with honey in treatments to increase their potency and also decrease the chances of bacterial resistance developing.

The research invested into the antibacterial properties of honey show that it is a very effective treatment that should be included into modern medicine in a larger scale. Currently certain medical grade honeys are used in the treatment of infectious wounds. These honeys are handled very differently to conventional honey to avoid contamination as they come in contact with exposed body tissue.

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Further research should be carried out to determine ways in which to administer antibiotic-honey coupled treatments for a greater, less risky effect that has the potential to eradicate antibiotic resistant bacteria.

~Adil Cader.