Category Archives: Science in the News

Mars: The New Earth?

If Earth becomes inhabitable due to the alarming rate at which climate change is occurring, is there a possibility for humans to live on Mars?

Previously, the idea of human life proliferation on Mars was mainly expressed in science-fiction. However, a recent study reveals a new application of a material to make Mars habitable for human life.

picture of Mars

Source: Pixabay

Scientists have investigated a new approach to the obstacle of terraforming Mars and making it a habitable planet through the usage of silica aerogels.

Silica aerogel is a solid and transparent material with extreme low density, and thermal conductivity. Its structure is composed of microscopic networks of silicon oxide; therefore, allowing it to be an extremely porous material with 97% of its volume composed of air. Because of these factors, currently, aerogels are widely known for its use as insulators and can be found in wetsuits, firefighter suits, skylights, windows, rockets, paints, cosmetics, and even on NASA’s Mars Rovers.

picture of silica aerogel Source: NASA

Scientists believe that due to its insulating properties, when placed in the atmospheric regions over surface areas that are ice carbon-dioxide rich on Mars, a 2 to 3cm layer thick of silica aerogel could allow constant visible light to transmit onto the surface and melt the Mars’ solid carbon dioxide into gas. The aerogel would trap the carbon dioxide gas to mimic the Earth’s greenhouse gas effect and as a result, allow for base photosynthesis to occur, perhaps granting the beginnings of life proliferation on our neighbouring planet. Additionally, this porous material is found to successfully block both ultraviolet and infrared radiation and its thermal conductivity characteristics can raise temperatures underneath to above the melting point of water, without the need for any internal heat source. The discovered key features of this material could provide scientists with the early steps to Mars’ terraformation.

The application of the silica aerogel can be tested in hostile environment currently on Earth that mimic the environmental conditions on Mars, such as Antarctica and Chile’s Atacama desert to study its effectiveness. However, additional factors to the living conditions on Mars such as atmospheric pressure, nutrient availability and dust deposition still need to be considered in this on-going research.

Although this discovery does not provide us with a solution to the Earth’s climate change, this new application of the aerogel could shift the focus on the solution to global warming indefinitely. Through this finding, perhaps the there is a possibility for humans to live on Mars after all.

More information about the synthesis of the silica aerogel can be found here:

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– Bernice Huynh

Bacteria Can Change Shape to Avoid Antibiotics?!

Can bacteria now consciously make the decision to change its’ shape to avoid being targeted by antibiotics? This article titled “Bacteria caught changing shape to evade antibiotics” seems to think so. However, upon reading this article, I discovered that it’s not that the bacteria makes the conscious decision to change its’ shape in order to avoid being targeted by antibiotics, but rather, the environment that the bacteria is in allows it to shed its’ cell wall. The title of the article is extremely misleading, and can cause undeserved panic because it is implying that bacterial organisms that are damaging to humans have evolved to the point where humans can no longer control them.

TEM of L-form bacteria from Mark Leaver of Newcastle University

If you continue to read the article, you’ll also discover that this certain strain of bacteria can’t evade all antibiotics. It can only make antibiotics that target the cell wall of the bacteria ineffective. There are antibiotics specifically made for targeting cell walls because there aren’t any human cells with cell walls, which makes it easier for the antibiotics to target the right cell. However, bacteria can shed its’ cell wall under non-hostile conditions such as an environment with high sugar concentration. By shedding that wall, the bacteria makes itself harder to detect by the antibiotics and our own immune system. That means that there is one less thing to differentiate the bacteria cell from our own human cell.

With a strong and healthy immune system, the L-form bacteria can eventually be destroyed. It is a little bit more complicated for people with weaker immune systems because they need help from antibiotics, but the antibiotics are ineffective because bacteria will stay in their L-form until the antibiotics leave the system, in which case the cell wall forms again.

Ultimately, there is no need to be worried that bacteria have evolved to consciously change its’ shape to avoid being targeted by our immune system or by antibiotics because it doesn’t. All the bacteria is doing is performing the functions it is programmed to do, like setting up protection against a hostile environment whether it is with a cell wall or without one.

-Sharon Li

 

Better Sleep Routine Leads to Better Grades in School

Baby sleeping

Source: Google Image

During the midterm season, just as we are in right now, many students in university and high school spend countless nights staying up late to study for their upcoming examinations. Although these students obtain more hours of study giving up their sleep, the test results do not match what they hoped for.

A study done by MIT (Massachusetts Institute of Technology) professors proved that in order to have better academic performance, students need longer sleep duration, better sleep quality and greater sleep consistency.

The study was done by tracking each student’s sleep throughout an entire semester using a device called Fitbits. Since the device uses a combination of the wearer’s movement and heart-rate patterns, Fitbits were used to estimate the duration and quality of sleep. For example, to determine sleep duration, the device measures the time the wearer has not moved, in combination with signature sleep movements, such as rolling over. To determine the quality of sleep, the device measured the wearer’s heart-rate variability which shifts during transitions between different stages of sleep. Fitbits were able to determine the sleep measures, and the professor compared those results to the in-class performance, such as quizzes and midterm examination.

The findings were quite interesting because they found that most of the students who went to sleep before the certain time, which was 1:47am, had higher overall score compared to students who went to sleep after. They also found that students who woke up before the certain time, which was 9:12am, had higher overall score compared to students who went to woke up after.

They found positive correlation between mean sleep duration and overall score, which means there could be relation between longer sleep and better grade. The negative correlation between sleep inconsistency, which was measured by the standard deviation of the student’s daily sleep duration, and overall score, means there is possibility that inconsistency in sleep duration could lead to lower grade. They also found a positive correlation between the wake-up time and overall score as well. Students who woke up before 9:12am  significantly higher score than the students who woke up after.

This research also touched on the academic performance between women and men. In the article focusing on the study, Dr. Grossman, one of the researcher that conducted the study, says sleep could be the reason to why women are doing  academically better in the class compared to men.

In the end, in order for students to do well in school, they need to be able to manage the time well enough so that they can also have a good-night sleep everyday and study for the classes.

-Sara Uzama

Alkaline Water: Water with Benefits?

Pouring water Source: Flickr

Water contains an abundance of life. It comprises 75% of your body weight and is essential to maintain homeostasis in your body. However, would the addition of alkalinity in your water create a greater benefit for your health? Multiple celebrities, such as Beyoncé and Miranda Kerr, have jumped on the bandwagon, promoting companies that sell alkaline water, however, is it really all it’s hyped up to be?

On a pH scale of 0 being acidic to 14 being alkaline, Alkaline water is found to have a pH above 7, more specifically it has a pH between 8-10, thus making it less acidic than pure drinking water which has a pH of 7. Alkaline water is found to contain alkaline minerals, such as magnesium and calcium, which provides it with its electrolytic properties that allows it to maintain the pH balance and homeostasis in your body that may be altered from diet or exercise.

The pH scale. Source: Flickr

 

Benefits of alkaline water

Companies that promote and sell alkaline water have suggested that drinking alkaline water can help with rehydration during exercise. A study was done on male athletes that tested the effects of consuming alkaline water vs. regular water during combat sports training. When comparing the 2 groups it found that the athletes who ingested alkaline water had a better hydration status, and overall performance.

Another study suggested that the consumption of alkaline water has therapeutic benefits for people suffering from reflux disease, which is a disease that leads to acid reflux causing heartburn and other symptoms. The primary cause of this disease is the damage generated by pepsin 3b, a digestive enzyme produced in the stomach. Upon its activation, it causes esophageal and laryngeal damage which ultimately leads to reflux disease. Researchers found that the pH of alkaline water permanently inactivates this human pepsin 3b through denaturation and as a result decrease its damaging properties.

Some other benefits include flushing out acidic waste and toxins and balancing pH levels in the body.

 

Risks of alkaline water

There haven’t been specific studies conducted by researchers that reflect on the health risks caused by drinking alkaline water. However, companies that sell alkaline water/ionizers such as DYLN suggests not to drink too much alkaline water too quickly. This is due to the potential negative side effects it can cause such as nausea and vomiting. These side effects are symptoms of metabolic alkalosis, which results from the sudden and severe increase of the pH in your body caused by drinking an excess amount of alkaline water.

There is also the risk of simply wasting your money on more expensive water. Watch below to see why:

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There haven’t been many studies conducted that can make us certain that there are health benefits or negative side effects of drinking alkaline water long term. So if you plan to make that switch to alkaline water, make sure to follow the suggestions provided by companies in order to maximize its potential benefits and minimize its negative effects.

-Karina To

Would You like Some Plastic with Your Tea?

Image:Flickr

Who doesn’t like coming home at the end of the day and drinking a nice cup of relaxing tea? Well, before you take a sip, you should first take a look at your teabag.

Recently, tea companies have started to switch from paper base teabags to ones made up entirely of plastics, specifically polyethylene terephthalate and nylon. This caught the attention of Laura M. Hernandez and her team over at McGill University, in which they recently published their findings showing that plastic teabags, also known as silken bags, release billions of plastic particles into the tea that is consumed.

Image:Flickr

The team took plastic teabags of different brands and steeped them, one by one, into boiling water at 95℃. When the tea bags were placed into the water they released about 11.6 billion microplastics (100 nm to 5 nm) and 3.1 billion nanoplastics (≤ 100 nm) into a single cup. The amount itself can be alarming, however humans consume an average of 39000 to 52000 microplastic particles annually, and this can increase based on various factors.

The question now stands, does consuming microplastics affect human health? Well, according to the World Health Organization, consuming microplastic has a low health risk in humans, but the amount of microplastics consumed should still be monitored in individuals. For instance, a study found that consuming large amounts of microplastics, over a long period of time, can lead to potential risks of cancer and toxicity in humans. That being said, microplastics effects on human health is an emerging field of study, as many microplastics are now used in everyday materials and products, such as in the food and water industries.

As Hernandez and her team have discovered, the teabags make delicious tea, but the amount of microplastics you are consuming per cup can be a bit concerning. Therefore, more research needs to be conducted on microplastics and its effect on human health.

– Anum Khan.

Making a Difference with Recycling..?

Recycling plastic here in B.C. is straightforward and easy. Simply sort your items into those blue bins and leave them out on weekly collection days. No headache, no hassle and no hidden conspiracy, right?

CBC’s Marketplace found out exactly otherwise. In an investigative report released this past weekend, by placing trackers in bales of plastic commissioned to be recycled, they found that only one out of three waste collection businesses with links to B.C.’s municipal recycling programs ended up recycling the plastic. What did the other two businesses do with their plastic? One dumped it in a landfill. The other brought it to a waste-to-energy facility, where it was incinerated, and what remained was then dumped in a landfill.

What was established instead, was that only 9% of Canadian plastic ended up being recycled. Which begs the question, what happens to the rest? In Canada, 2.8 million tonnes were thrown away as garbage. Ending up in landfills or oceans. On a global scale, 8 million tonnes go into the oceans annually. In the ocean, plastics are then weathered under the influence of solar UV radiation into miniscule fragments called, “microplastics”.

Microplastics are either consumed by marine life or wash up along the shores of beaches. On beaches, they become a habitat in which bacteria can proliferate. With a recent study finding a vast array of bacterial communities thriving on the surfaces of microplastics sampled from beaches and coastal regions in Singapore. Some of the bacteria found were harmful, being linked to the bleaching of corals or infection of open wounds. But some bacteria species identified were able biodegrade plastic, offering a potential solution towards solving the plastic pollution issue.

It should be clear by now that the accumulation of plastic pollution in the oceans is bad. Further compounding this is the ineffectiveness of recycling. So, what does that leave residents of B.C. to do? Reduce and Reuse. The onus once again falls on the individual to be ever more vigilant, and more responsible for minimizing their part in the use of plastic.

– Ryan Chew

Mars: the new Earth?

With the alarming rate of climate change occurring on Earth, will the planet the we call “home” eventually become uninhabitable?

Although it was previously believed that human life could only survive on Earth, a recent study reveals a way to make Mars habitable.

picture of Mars  Source: Pixabay

Instead of trying to make Mars more similar to Earth through atmospheric modifications, Scientists have discovered a new approach to the obstacle of finding a second habitable planet through the usage of silica aerogels.

This material, when placed over regions that are ice-rich on Mars could allow constant visible light to transmit onto the surface for photosynthesis to occur. It could also block ultraviolet radiation and even raise the temperatures underneath to above the melting point of water, without the need for any internal heat source. In addition to these factors, scientists believe that a 2 to 3cm layer thick of silica aerogel get could potentially be equivalent to the Earth’s atmospheric greenhouse effect, thus allowing the beginnings of life proliferation on our neighbouring planet.

Silica aerogel is a solid material with extreme low density, and thermal conductivity. It is an extremely porous material and is currently widely known for its use as an insulator. Currently, aerogels can be found in wetsuits, firefighter suits, skylights, windows, rockets, paints, cosmetics, and even nuclear weapons. However, this new application of the aerogel could shift the focus on the solution to climate change and global warming indefinitely.

The application of the silica aerogel can be tested in hostile environment currently on Earth, such as Antarctica and Chile’s Atacama desert. However, additional factors to the living conditions on Mars such as atmospheric pressure, nutrient availability and dust deposition still need to be considered in this on-going research.

But, through this discovery, perhaps the idea of living on Mars not too far-fetched after all.

Image of Fingers Source: flickr

– Bernice Huynh

Dogs: more than just cute!

Angus, one of two “super sniffer” dogs trained to alert their handler when they detect C. difficile. Source: Vancouver Coastal Health

We’ve all seen (or heard of) drug-sniffing dogs, but what about bacteria-sniffing ones?

Since 2016, a team from Vancouver Coastal Health has been tweaking a program that trains dogs to alert their handlers when they detect the scent of C. difficile. Over an 18-month period, the two dogs (Angus and Dodger) that have been trained for this role have detected 391 areas at Vancouver General Hospital where this bacteria was found.

Clostridioides difficile, more commonly referred to by its shorthand C. difficile or simply C. diff, are the leading cause of nosocomial (or hospital-originating) infectious diarrhea. Formerly known as Clostridium difficile, the bacterium was renamed late last year to more accurately portray the genus it falls in.

Angus and Dodger were trained with scent training kits from the Scientific Working Group on Dog and Orthogonal detector Guidelines (SWGDOG), which allowed them to identify the distinct odour of C. difficile. Microorganisms smell due to the variety of volatile chemicals they produce in response to various external factors. In the specific case of C. difficile, it is often described as having a sickly sweet or particularly foul smell.

The symptoms of a C. difficile infection can range from mild abdominal cramping to life-threatening sepsis and inflammation of the colon. The full range of symptoms can be found here. Most cases occur after taking antibiotics, which may kill both the good and bad bacteria in your gut – these are known as your gut microbiota. 

Without your normal gut microbiota, C. difficile can take advantage of this “clean slate” and proliferate in your intestine, throwing off the balance of good and bad bacteria. Within a period of several days to a few weeks, infected patients will start to show symptoms – the most common being diarrhea. Ideally, somebody with symptoms of infection will have tests done by a doctor and undergo treatment if necessary.

The progression of infection and the post-infection considerations are shown below in this graphic published by the Centre for Disease Control:

The progression of a C. diff infection. Source: Centre for Disease Control

In a study published by the Canadian Journal of Infection Control, it was found that 82% of contaminated surfaces were found in common areas. These included washrooms, hallways, and waiting rooms. Even with the most stringent sanitization procedures, it was relatively easy to find in areas that are commonly overlooked! 

One of the areas that tested positive for C. difficile contamination was inside a toilet paper dispenser – something that I personally would never think to sanitize. 

While there’s still a lot of work that needs to be done before we can train dogs to safely detect all sorts of infectious bacteria, the developments of the canine scent detection program are notable steps in the right direction. 

For more information about canine scent detection of C. difficile in Vancouver-area hospitals, you can learn more here and through this page.