Essays on Petri

The article Leveraging OneNote at Your Company by Joseph Finney (2016) deals with the problem of managing information, data and projects by the companies which do not have specialized software that could perform such function and do not have a financial opportunity to acquire it. The author suggests a solution for such companies, and namely OneNote program offered by Microsoft free of charge. This program gives more freedom and flexibility to the project management process and makes data more visible, understandable and accessible. OneNote is very useful for teams that work together on a particular project: it gives a ...

BIO 103

Introduction: Plant cells photosynthesize to produce glucose. By doing this, light energy, coming from the sun, is transformed in chemical energy, glucose. Oxygen is also produced from carbon dioxide and water. The process occurs by light dependent reactions (in thylakoids) and dark dependent reactions (in the stroma). In the light, plants produce energy molecules, such as ATP and NADPH; in the dark, they use those molecules to fix the CO2. The excess of glucose during photosynthesis can convert into starch.

Purpose:

The purpose of this experiment was to determine the differences between leaves from plants exposed to the sun and ...

Introduction

Tension forces act on liquid surfaces, the thread in them is pulled into circular arcs. The pull is referred to as surface tension of the liquid. Surface tension exists uniformly in all directions. The forces affect the shape and motion of liquids that have open surfaces. Tension forces can be understood regarding forces that occur between the molecules. Repulsion occurs in molecules when they are close but attract when they are far from each other. Inside the liquid, molecules are close to each other. Thus, there are slight repulsions. Molecules at the surface of the liquid are some distance ...

Purpose

This experiment sought to determine the value of the surface tension of water and paraffin oil from the downward pull on a horizontal ring fastened to a spring.

Apparatus

The following materials were used in the experiment: Platinum-iridium ring equipped with stirrup (circumference L=4cm)

Spring

Paraffin oil Distilled water Petri dish Weight pan Striker Level Jolly balance with adjustable platform Scale to determine the paraffin oil density Suitable weights Bunsen burner Tweezers Introduction Surface tension refers to the energy required to expand a liquid’s surface area (Ozment, John, and Conrad, 391). Liquid molecules are attracted to one another by adhesive ...

Lab report

Abstract The contemporary microbiology world has witnessed a gradual interest in identifying the types of microbes that are resident in the human body more so due to plausible health benefits they may bring and because of their possible detrimental effects. In this regard, fear of the pathogenic consequences of microorganism in the body has pioneered the advent of hand sanitizers aimed at checking this effect. As a standard procedure in microbiology especially in laboratory experiments, sanitizers are used in eliminating microbes from the surface of the hand. The conducted experiment in this write-up thus aims to analyze the presence ...

Abstract

In the experiment, the main objective was to compare the efficiency of two treatments in terms of Ajax and Hand sanitizer. The class was divided in two groups and Group A performed hand washing with Ajax while Group B used the hand sanitizer as hand washing agent. Cultures of the dominant hand by imprint method using Petri dish agar were done on each subject before and after the application of hand washing agents. The inoculated agar Petri dishes were incubated for a week at 37°C. Colony counts of the organisms identified were made. The mean change in the number ...