Science essays

ABSTRACT: Hyaluronic acid is a naturallyoccurring polysaccharide possessing unique properties, such as high viscosity and water retention, tunable molecular weight, and lack of immunogenicity and toxicity, that allow for its usage in biomedical, pharmaceutical, food, and cosmetic industries. Two primary production methods exist for hyaluronic acid: extraction from animal tissues and biological fermentation. Each production … Read more

Atomic structure: The atomic structure of all things involved in this process is very important. It allows us to understand how all things are connected and can bond together to complete the process. An atom consists of a nucleus which is located in the middle of the atom, this includes positive and neutral particles called … Read more

Stress is said to be the relationship between a response and the environmental conditions that caused it. Stress initiates a reaction due to conditions that puts one under a significant amount of pressure, possible threats, or the individual working under high demands (Dobson and Smith 2000). For an animal, stress may be seen as the … Read more

Francis Sellers Collins is an American physician-geneticist, who is the16th Director of the National Institutes of Health (NIH). He was known for identifying several disease genes including cystic fibrosis, Duchenne muscular dystrophy, and Huntington’s disease, as well as carrying out the Human Genome Project and other projects which are significant to biology development, such as … Read more

The giant asteroid that hit the Earth 65 millions years ago might have marked the end of the dinosaur era but the evolution of mammals has exited long before then. This opened the door to the diversification of terrestrial animals. The evolution of these animals has changed so much since the Cretaceous/Paleocene era. The size … Read more

The most common model of photo-biological rhythmicity involves the initial intake of periodic environmental signals through photoreceptive organs. These external stimuli are then relayed to and integrated in the central pacemaker of the organism, which thus, in a multi-oscillator system, controls the oscillations of other biological clocks. These secondary oscillators account for the overt and … Read more

1. The brain cells and the liver cells may vary when it comes to morpohology, structure and function because following the lecture on “The Cell and its Components,” cells have biochemical resemblances. All cells have their genetic information “stored in DNA molecules” which are “made up of nucleotides.” In addition, it was stated that “In … Read more

In this experiment, I will determine How Does Carbon Dioxide Affect Plant Growth using sunflower seeds and 2- liter bottles to create home-made Carbon Dioxide. I hypothesize that if the amount of Carbon Dioxide is increased, then the plants will grow more because plants require chemicals to grow, therefor causing the amount of photosynthesis to … Read more

Abstract Daphnia magna is a species of water flea that typically inhabits freshwater ecosystems such as ponds and lakes. Because of their small size, they are susceptible to changes in their environment. To investigate how different environments affect them, we conducted an experiment with six different concentrations of vinegar: 0% (water), 0.01%, 0.1%, 1%, 5%, … Read more

Introduction At present, cosmetics as trace evidence are not widely used in the forensic area. Current research involving cosmetics as trace evidence are biased towards lipsticks. Lipstick smears are frequently encountered in forensic laboratories as an important form of transfer evidence Ehara and Marumo (1998). There is little/hardly any on foundation and blusher samples as … Read more

Priority Existing Chemical (PEC) Report of Hexabromocyclododecane (HBCD) [PEC/34, 2012], carried out under the National Industrial Chemicals Notification and Assessment Scheme (NICNAS) As HBCD has been determined to be a hazardous substance in relation to human health according to the Safe Work Australia’s Approved criteria for classification of hazardous SCOPE This analytical summary and briefing … Read more

What is a Cell? Cells are the essential building blocks of all living things. It is the smallest unit of an organism that can carry out the function of life. Some cells are single, self-sustaining organism such as amoebas or bacteria. Other cells are a part of a multicellular organisms that cannot survive on its … Read more

Abstract Magnetic graphene oxide modified with amine was synthesized as an adsorbent for the extraction of cadmium ions (II) from food and water samples using flame atomic absorption spectroscopy (FAAS). The structural properties of the adsorbent synthesized by SEM, TEM, EDS, FTIR, VSM were investigated. Various parameters affecting extraction efficiency such as pH, amount of … Read more

Purpose: In this experiment, you will determine the method by which Brita Filters filter out solute from water. You will attempt to answer: “does the filter remove a particular fraction of a given solute, or bring the solute concentration to a particular level?” (Weaver, 2018). Background and General Information: The goal of this experiment is … Read more