In this section you’ll find free example science essays to inspire your own work. One of our biggest essay categories, our science section includes essays on physics, chemistry, botany, biology, palaeontology, genetics, geology and more. Find more science essays here. We also have a separate section for zoology essays.
Sexual dimorphism has been a major topic of discussion among anthropologists in recent years, particularly debating reasons of occurrence in nonhuman primates. Sexual dimorphism originated from Charles Darwin’s theory on sexual selection, presuming females ‘“choose” their male mates’ (Plavcan, 2001: 33), contingent on sexual characteristics and attractiveness (Stanford et al., 2011). In contrast, sexual dimorphism … Read more
Over the course of many decades, the human population has attempted several approaches to satisfy the demand for energy. As the population continues to grow exponentially, our alternatives to obtaining energy, from our houses to our jobs, have changed. In the spectrum of energies that exist today, there has been one that is the most … Read more
1. Introduction 1.1 Natural Disasters Natural disasters are naturally occurring events that threaten human lives and causes damage to property. Examples of natural disasters include hurricanes, tsunamis, earthquakes, volcanic eruptions, typhoons, droughts, tropical cyclones and floods. (Pask, R., et al (2013)). They are inevitable and oftentimes, can cause calamitous implications such as water contamination and … Read more
A zoonosis is a disease that can be transmitted from animals to humans. Zoonoses in companion animals are known and described extensively. A lot of research has already been done, Rijks et al (2015) for example lists the 15 diseases of prime public health relevance, economical importance or both (Rijks(1)). Sterneberg-van der Maaten et al … Read more
Summary In this project is the effect of cholesterol at ceramide converting in sphingomyeline, glucosylceramide, ceramide 1-fosfaat and sphingosine in SK-N-AS and HeLa cells discovered. Those sphingolipids are found in mammalian cell membranes are involved in a variety of different functions like first/second messengers, membrane lipid rafts, and in a lot of different signalling pathways … Read more
1: Introduction Thomas Graham in 1861 studied the ability of those dissolved substances capable to diffuse into water across a permeable membrane. He observed that crystalline substances likeC6H12O6, CH4N2O, and NaCl passed through themembrane, while others like glue, gelatin and gum arabic did not. The former he called crystalloids and the latter colloids (Greek, kolla= … Read more
The historical unraveling of the memory systems present in the mammalian brain has been an extensive journey of scientific discovery. Through the work of countless individuals, major hypotheses have been proposed which have led to the current view of how memory is stored and retrieved. Though many uncertainties and controversies still exist, the general mode … Read more
CHAPTER 1 INTRODUCTION The inflammation is a biological complex response of the vascular tissue towards the harmful stimuli caused by pathogens, damaged cells as well as the irritants. The role of the inflammation in pain is directly straightforward as it accompanied by pain. The chemicals from the body white blood cells will released into the … Read more
1. INTRODUCTION Plastic packaging materials perform an important role in the food industry due to their toughness, light weight and flexibility that ceramic and metals cannot meet (1). Nevertheless, the environmental effect caused by traditional plastics materials mainly associated with the waste-disposal problems due to their low biodegradability and the impediment of recover all the … Read more
Introduction Apatite is a mineral that is known for its source of phosphorous, which is use for many living things. Apatite also comes in a majority of colors, For example they are blue, green, clear, yellow, and etc. The most accepted density average of Apatite is 3.19 g/cm3. The uses of Apatite are for the … Read more
Microalgae or microphytes are photosynthetic microorganisms which vary in size from 2 to 200 micrometers, can form chains of cells, but do not form differentiated multicellular organism, are polyphyletic and can be found in a variety of saline and freshwater streams on our planet. The evolutionary history and taxonomy of microalgae is complex due to … Read more
Animals Throughout the present study, healthy adult male Wistar rats weighing 240-270 g were maintained in a laboratory under a 12:12 h light-dark cycle (lights on at 07:00 h) at a controlled ambient temperature (22 ± 0.5°C) with free access to food and water. Experiments were performed between 10:00 h and 14:00 h. Veterinary Ethics … Read more
Elements will form compounds in order for them to become stable. Elements don’t combine to form compounds at r&om, many different factors will come into this, the main & most important one being the electronic configuration, meaning the finally electronic configuration of the atoms must be 2n2, where n=maximum number of electrons a shell can … Read more
There are many aspects that must be reviewed when entering the laboratory and there are many regulations that need to be followed to ensure not just your own safety but the safety of your workers around you. Inhalation is one issue that could occur within the laboratory. Within the laboratory many procedures involve the breaking … Read more
Introduction: Magmatic- hydrothermal ore deposits provide the main source for the formation of many trace elements such as Cu, Ag, Au, Sn, Mo, and W. These elements are formed in a tectonic setting, by fluid dominated magmatic intrusions in Earth’s upper crust, along convergent plate margins where volcanic arcs are created. Vapor and hypersaline liquid … Read more
