DNA vs. RNA – 5 Key Differences and Comparison
Jan 22, 2024 · What are the three types of RNA? Messenger RNA (mRNA) copies portions of genetic code, a process called transcription, and transports these copies to ribosomes, which are the cellular factories that facilitate the production of proteins from this code.Transfer RNA (tRNA) is responsible for bringing amino acids, basic protein building blocks, to these protein factories, in response to the coded ...
Atomic Absorption Spectroscopy, Principles and Applications
Jan 24, 2024 · The English chemist, Wollaston, was the first to observe dark lines in the solar spectrum that became known as Fraunhofer lines.In 1832, Brewster concluded that atomic vapors in the atmosphere absorbed some of the radiation from the Sun resulting in the detection of these lines. Bunsen and Kirchoff demonstrated soon after that each chemical element had a characteristic color or spectrum when ...
Active vs Passive Immunity: Differences and Definition
Dec 18, 2023 · Immunity is made up of both innate and adaptive arms. Innate immunity, also known as natural or genetic immunity, is something an organism is born with, encoded in their genes and protects them throughout their life.Innate immunity consists of: External defenses: Known as the first line of defense, external defenses work to protect an organism from pathogen exposure and include things like the ...
Mann-Whitney U Test: Assumptions and Example - Technology …
Mar 25, 2024 · The Mann-Whitney U Test, also known as the Wilcoxon Rank Sum Test, is a non-parametric statistical test used to compare two samples or groups. In this article, we explore the basics of the Test and work through an example.
GC-MS Principle, Instrument and Analyses and GC-MS/MS
Feb 16, 2024 · The sample mixture is first separated by the GC before the analyte molecules are eluted into the MS for detection. 1 They are transported by the carrier gas (Figure 1 (1)), which continuously flows through the GC and into the MS, where it is evacuated by the vacuum system (6). 1. The sample is first introduced into the GC manually or by an autosampler (Figure 1 (2)) and enters the carrier gas ...
Paired vs Unpaired T-Test: Differences, Assumptions and Hypotheses
Jan 24, 2024 · Paired t-tests are used when the same item or group is tested twice, which is known as a repeated measures t-test. Some examples of instances for which a paired t-test is appropriate include:
UV-Vis Spectroscopy: Principle, Strengths and Limitations and ...
Dec 18, 2023 · Ultraviolet-visible (UV-Vis) spectroscopy is a widely used technique in many areas of science ranging from bacterial culturing, drug identification and nucleic acid purity checks and quantitation, to quality control in the beverage industry and chemical research. This article will describe how UV-Vis spectroscopy works, how to analyze the output data, the technique's strengths and limitations ...
LC-MS – What Is LC-MS, LC-MS Analysis and LC-MS/MS
Jul 30, 2024 · Coupling liquid chromatography (LC) with mass spectrometry (MS) has provided scientists with a powerful tool to meet stringent analytical demands and their versatility and efficiency means LC-MS instruments have become desirable in many laboratories. In this article, we consider how LC-MS works, what it tells us and highlight some of the technique's strengths and weaknesses.
SEM vs TEM - Technology Networks
Jan 24, 2024 · Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) are the two most common types of electron microscopy. TEM and SEM differ in how they work and what types of images they are able to capture. This article will overview SEM and TEM, including what they are, how they work, and how they compare to one another.<br /><br />
Neuroimaging Techniques and What a Brain Image Can Tell Us
Apr 8, 2024 · Neuroimaging is a discipline that deals with the in vivo depiction of the structure, function and pharmacology of the central nervous system (CNS), particularly our brain, in a noninvasive manner. 1, 2 The past two decades have witnessed remarkable strides in the development of new anatomical and functional imaging techniques that can shed light on many critical aspects of human brain function ...