Cathode

DNA ISOLATION INTRODUCTION: Deoxyribonucleic acid (DNA) isolation is an extraction process of DNA from various sources. Methods used to isolate DNA are dependent on the source, age, and size of the sample. Despite the wide variety of methods used, there are some similarities among them. In general, they aim to separate DNA present in the nucleus of the cell from other cellular components. Isolation of DNA is needed for genetic analysis, which is used for scientific, medical, or forensic purposes…

Of the four organic macromolecules deoxyribonucleic acid, or DNA, is a nucleic acid. DNA is a double-stranded molecule comprised of numerous nucleotides covalently bound together. Nucleotides contain a deoxyribose sugar, a phosphate group, and one of four nitrogenous bases. The four nitrogenous bases are adenine (A), thymine (T), guanine (G), and cytosine (C). To construct DNA’s double helix, hydrogen bonds form between two complementary nitrogenous bases. These bonds only form between adenine…

Development of the atomic theory throughout history Abstract This paper will explain many concepts of the atomic theory. It will also include very important information that involves 15 scientists and their contributions to the atomic theory. There are many different models that scientists constructed, that they believed atoms looked like. There are only 5 atomic models that have ever been accepted. Our perspective on the atom has changed throughout the years…

2. Basic theories and principles 2.1 Chemical vapor deposition 2.1.1 Definition of chemical vapor deposition Chemical vapor deposition (CVD) is a versatile process which is widely applied to produce coatings, powders, fibers and monolithic components [1]. Applying the chemical vapor deposition, it is possible to produce alloy and compounds of metals and nonmetal materials. Chemical vapor deposition can be defined as the deposition of a solid on a heated surface from a chemical reaction in the…

This case has multiple issues that need to be discussed and clarified. First of all, Cory advances an advertisement regarding selling his computer. He then affirms that the binding will start according to the date of the acceptance. His first offer comes by email, but encounters some faults that delay its arrival. The email is followed by a fax that counter-offers the initial proposed price. The offer Firstly, it should be discussed if the proposal constitutes an offer or an invitation to treat…

E-waste stands for electronic waste such as computers, cell phones, printers, and television. E-waste is unwanted or unused electronics that are no longer in use. Unused electrons are stuffing landfills on the globe. The EPA, an Environmental Protection Agency is a federal government program which is design to help keep safe environments and human’s well-being. However the EPA proclaimed, “the United States have more than 100 million worth of hardware to discard and just 20 percent of it is…

Flow batteries have been around since the 1970’s this technological advance in the field of energy storage and acts as a fuel cell which can provide a new and efficient energy supply. One of the biggest advantages of flow batteries is that they can practically in an instance recharge just by replacing the electrolyte liquid,while this happens it is recovering the spent materials for recharge. Several different flow batteries have been developed, including Redox, Hybrid and, Membraneless. The…

Gel electrophoresis is a method used for separation and analysis of molecules such as DNA, RNA, and proteins, based on their sizes and polarity. DNA (deoxyribonucleic acid) is a molecule that carries most of our genetic information, and possesses a negative charge. During gel electrophoresis, DNA fragments can migrate through the gel also known as agarose when placed in a powerful electrical field. The rate at which the DNA fragments will move through the gel depends on their relative size.…

Natural selection is a concept that has long since interested me, I consider it to mean “survival of the fittest”. Thus, looking upon this title, I deduced that the metaphor, which is used for comparison, implies the following principles of natural selection apply to knowledge development: there is variation in knowledge, the ‘fittest’ knowledge is most suitably adapted to the environment, and superseded knowledge is not fit to survive. Questions and doubts thereby arise: What is meant by the…

measurement of the amount of particle, coulter counter operates by measuring the changes in the current intensity between two electrodes that submerged in the suspension of particles in conducting fluid. The conducting fluid is flow between anode and cathode through a small hole called as orifice. Presence of a particles in the orifice cause changes in resistant. Following the Ohm’s formula: Intensity = Voltage / Resistant. The changes in resistance is also related with particle diameter where…