Author Archives: Amir Jafarvand

New Material Stores Oxygen for Later Use

Oxygen is an important element required for metabolisms occurring in our body and without it we would be dead in a couple of seconds. This is the reason that we cannot survive under the water or any other place without oxygen. Scientists  at University of Southern Denmark found a new way to store oxygen for using in places that oxygen is not available. They made a substance based on cobalt which can absorb oxygen from its surrounding air or water and release it anytime it is needed.

By Kenneth Abbate , via Wikimedia Commons

Oxygen can bind many different materials but the result is not always useful. For instance, oxygen can spoil foods or can rust metals. Professor Christine McKenzie, one of the researchers, explains that this new material can reversibly react with oxygen which means it can be used to transport oxygen and release it in its initial form similar to what hemoglobin does in our body. Cobalt is responsible for determining the structure of this new material in a way that it has affinity for oxygen same as iron in our body. Professor McKenzie added that the rate of oxygen absorption can range from seconds to days because of several factors such as atmospheric oxygen content, temperature and pressure. Furthermore, the material releases oxygen when it is heated up or placed in a vacuum. This material can be used to make many useful devices. For example, a light weight device could be designed to provide oxygen for patients with lung diseases who have to carry heavy oxygen tanks with themselves all the time. In addition, divers can use this material to stay longer under the water since it can absorb oxygen from water if the diver breathes in all the available oxygen in the material.

By Stephan Borchert (Eigenes Werk.) via Wikimedia Commons

-Amir Jafarvand

Is It Safe to Take Expired Medications?

Nowadays, abundance of over the counter drugs has led to people’s self-medication. Therefore, many of us have lots of unused drugs at home that usually get expired and we are not sure if it is still safe to take them after their expiration date.

By Jaroslav A. Polák

According to a study done by Food and Drug Administration (FDA) on expired drugs of military, it was found that 90% of expired drugs were still potent and harmless after 15 years. Therefore the expiration date on drugs does not actually mean anything. Mr. Flaherty, a pharmacist at the FDA, believes that the expiration date of drugs is mostly for marketing purposes because the drug manufacturers want to maximize the profits by having the drugs restocked in shelves at shorter time intervals. You may think that the focus of the research was on drugs used in wars and this does not mean the regular drugs usually used by people are effective after their expiration date. However, Joel Davis, a former FDA expiration-date compliance chief, states that most drugs can last as long as the drugs tested in the research if they are stored under optimal conditions.

By Israel Defense Forces

Furthermore, FDA claims that keeping expired and unused medications at home may pose a threat to children or older people. Children may find the stockpile of unused drugs and take them while older people may mix up all of their medication and take the wrong one. US Drug Enforcement Administration also reports that keeping old medications at home increases the possibility of prescription drug abuse. Therefore, it is very important to dispose of old and unused medications. It is not a good idea to get rid of the old medications by flushing them down the toilet or throwing them in the trash because the medications would pollute our environment. In order to dispose of our unused drugs properly, we should take them to our local pharmacy or anywhere that take-back programs are offered. In the following video, US president, Barack Obama, talks about the importance of “National Prescription Drug Take-Back Day” and how prescription drug abuse can cause heroin addiction.

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-Amir Jafarvand