LEO

Home » Posts tagged 'STEM'

Tag Archives: STEM

STEM Fellow: Probing the Semantic Representations of Emotional and Social Concepts in Autism

By Lucy Cao, VI Form

 

Probing the Semantic Representations of Emotional and Social Concepts in Autism

Abstract

Please Click The Image To Download/See the  Poster

Autism Spectrum Disorders (ASD) are a set of neurodevelopmental disorders as shown through difficulties in social interaction and communication as well as repetitive behaviors. Symptoms of ASD manifest at an early age and become most prominent between the ages two to three years old. One major area of defect common among ASD individuals is language and communication, especially the ability to comprehend language and make inferences based on social and emotional context. Recent linguistics studies have shown that there is an association between the ability of individuals with autism to attribute mental states (to themselves and others) and verbal skills. It is found that high-functioning ASD individuals have a less coherent representation of emotional experiences and tend to avoid using emotional terminology. The goal of this study was to examine the relationship between social competence and semantic representation of social and emotional concepts. Knowing that lexical co-occurrences are useful measurements of semantic knowledge, participants of this study were asked to rate pairs of verbs in terms of similarity on a scale from 1 to 5, 1 being very similar and 5 being very dissimilar. Data collected from the typically developing (TD) participants indicates that there is a correlation between social competence and accuracy of similarity ratings of verbs containing social and emotional content. The less socially competent, the less accurate the ratings are. Moreover, such a correlation is not present in verbs of no social or emotional content. However, the investigator failed to identify a significant difference in the ASD population’s perception of emotional and social verbs and the control participants’ perception of these verbs due to reasons of methodology.

(more…)

The West Nile Virus: The Minor Zoonotic Problem Without A Major Solution

By Anuoluwa Akibu, Jack Griffin, Sierra Petties, & Ben West, III Form; with mentors Ben Robb, V Form & Blaine Duffy, VI Form

The West Nile Virus: The Minor Zoonotic Problem Without A Major Solution

Abstract

In the information below, you will be able to take away a full understanding on the West Nile virus, and how it is transmitted zoonotically. West Nile virus (WNV) is a pathogen, specifically a flavivirus, and it is found in arthropods. West Nile virus infections are most common in temperate areas, between late summer and early fall, when mosquito activity is at it’s peak. Although many people become infected with WNV most people do not show symptoms. The few who do, mostly have minor symptoms like fever and headache. One percent of the people infected with the virus develop lethal symptoms that require immediate medical assistance. Most cases of West Nile virus come from mosquito bites. The mosquitoes infect humans and other animals which are called dead end hosts. Dead-end hosts cannot pass the disease on to another host. Birds however are different because they are amplifier hosts. That means they continue to spread the disease to mosquitoes have not received the virus yet. The only known treatment to West Nile virus at the moment is pain killers because scientists are still figuring out a solution. There are cures for animals and some in development for humans. There isn’t a practical solution to West Nile virus, but there have been prevention methods created. The main focus for many groups worldwide is of the disease by managing the mosquito population and observing the bird population to restrict the further spreading of the disease. Researcher(s): All;  Editor(s): All (more…)

STEM Fellow: Mitochondrial Disease in C. elegans

By Katherine Hartigan, VI Form

Mitochondrial Disease in C. elegans

Abstract

Mitochondrial disease refers to a class of hundreds of disorders related to the mitochondria that are caused by mutations in either mitochondrial DNA (mtDNA) or nuclear DNA

Please Click The Image To Download/See the  Poster

(nDNA). These mutations disrupt cellular respiration and the production of ATP, resulting in the overproduction of damaging free radicals. Mitochondrial diseases were once thought to be rare, but links between mitochondrial defects and many diseases of aging have been discovered, making these diseases far more prevalent than previously thought. A cure is nonexistent, and treatments are often individualized or ineffective. Antioxidants, such as Coenzyme Q10, have the ability to neutralize free radicals, making them a logical choice as a dietary supplement for mitochondrial disease patients. In this experiment, the C. elegans mev-1 mutant was used as a model organism for human mitochondrial disease. MitoQ, a reengineered form of Coenzyme Q10 targeted to the mitochondria, was added as a supplement to the diet of mev-1 mutants. The groups of mev-1 mutants were observed and data was collected every 12 hours until their death to determine their approximate lifespan. Following experimentation and data collection, it was found that there was not a significant difference in between the lifespans of the control mev-1 mutants without MitoQ, and the experimental mev-1 mutants with the MitoQ added to their diet. It is necessary to repeat this experiment while collecting data in shorter time intervals than 12 hours in order to draw more accurate conclusions when completing future research. (more…)

Carbon Dioxide vs. The Ocean

By Laura Drepanos, IV Form

Carbon Dioxide vs. The Ocean: What I learned at the High School Marine Science Symposium

Are the ocean’s problems really my problems?

This was the only question going through my head as I pulled up to front circle two days before March break at 6:50 in the morning.

The short answer: yes.

When Ms. Lohwater announced at school meeting that there was an opportunity to go to the High School Marine Science Symposium (HSMSS) at Northeastern University, I immediately took it. I have always loved learning about the ocean and visiting the Wood’s Hole Oceanographic Institution since I was young. Missing a day of classes for this at the end of the academic window required an overwhelming amount of planning ahead: I had to take tests on my own time and finish all of my assignments. However, I left the HSMSS with many takeaways that made it all worth it.

My first takeaway: Sea Acidification is very real. (more…)

Fake News & Google: A Vessel in the Sea of Verity and Deceit

By Lulu Eastman, V Form

Fake News & Google: A Vessel in the Sea of Verity and Deceit

In our Digital Age, Google has become a vital tool to the global population, with over a billion people worldwide relying on the search engine as their guide to the human library known as the internet. Google not only nurtures the insatiable curiosity and hunger for knowledge innate to mankind, but also easily provides the masses with unreliable and false information, resulting in an age where anyone can easily be deceived online. (more…)

STEM Fellows: Fragile X Syndrome in Fruit Flies

By Jenny Deveaux and Samantha Sarafin, VI Form

Peripheral Nervous System Deficits and Social Behavior in Drosophila FMR1 Mutants

1.1 Abstract

Click here to view full size of poster

Fragile X syndrome is a genetic disorder caused by a trinucleotide repeat mutation in the FMR1 gene, occurring in one in 4,000 males and one in 8,000 females. The syndrome is characterized by a variety of social, learning, and cognitive deficits specific to each patient. The pathways surrounding the expression of the fragile X phenotype are largely unknown, and there is no current treatment for the disorder. Numerous studies have been conducted to investigate the role of the central nervous system in developmental disorders such as Fragile X Syndrome; however, there is a lack of studies focusing on the role of the peripheral nervous system. In our study, we developed a line of Drosophila melanogaster, using the GAL4-UAS system, that expresses the dFMR1 mutation only in the olfactory sensory neurons, a vital part of the Drosophila’s peripheral nervous system. We conducted aggression and courtship assays to test the social behavior of the peripheral dFMR1 mutants. We compared these behavioral results with the results of control wild-type flies and with Drosophila that have the dFMR1 mutation in their entire anatomy. Our preliminary results suggest that both aggression and courtship should be further researched, as it was found that specific characteristics of each social behavior were impaired in some way. The most noteworthy data that was collected was significantly lower courtship index in the experimental line and a complete lack of dominance of the experimental line in the aggression assay. Because the Drosophila that were genetically crossed using the GAL4-UAS system had the dFMR1 gene silenced in their olfactory sensory neurons, the flies had an abnormality in their ability to detect pheromones, which studies show are the basis of Drosophila social interaction and behavior. (more…)