DNA vs. RNA – 5 Key Differences and Comparison
2024年1月22日 · DNA is a much longer polymer than RNA. A chromosome, for example, is a single, long DNA molecule, which would be several centimetres in length when unraveled. RNA molecules are variable in length, but much shorter than long DNA polymers. A large RNA molecule might only be a few thousand base pairs long. Sugar.
Active vs Passive Immunity: Differences and Definition
2023年12月18日 · Active immunity is defined as immunity to a pathogen that occurs following exposure to all or part of that pathogen. When the body is exposed to a novel disease agent, a cascade of signaling molecules and action from the innate immune system results in activation of the adaptive immune system. Production of large numbers of T cells and B cells ...
Prokaryotes vs Eukaryotes: What Are the Key Differences?
2024年6月26日 · In prokaryotes, DNA is bundled together in the nucleoid region, but it is not stored within a membrane-bound nucleus. The nucleus is only one of many membrane-bound organelles in eukaryotes. Prokaryotes, on the other hand, have no membrane-bound organelles. Another important difference is the DNA structure.
An Introduction to Culturing Bacteria - Technology Networks
2024年1月24日 · Bacteria are an essential part of the ecosystem. They are crucial to our health and the environment, have an important role in food production and provide bioengineers with tools to harness their properties and manufacture compounds. However, they can also be harmful, causing damage and disease. The ability to grow these microbes is therefore ...
GC-MS Principle, Instrument and Analyses and GC-MS/MS
2024年2月16日 · 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 …
Cation vs Anion: Definition, Chart and the Periodic Table
2024年1月24日 · Cations are ions that are positively charged. Anions are ions that are negatively charged. Ions are charged atoms or molecules. If a balanced atom loses one or more electrons, it will become a positively charged cation. If a balanced atom gains one or more electrons, it will become a negatively charged anion.
Genotype vs Phenotype: Examples and Definitions
2022年9月12日 · Understanding the relationship between a genotype and phenotype can be extremely useful in a variety of research areas. A particularly interesting area is pharmacogenomics.Genetic variations can occur in liver enzymes required for drug metabolism, such as CYP450.Therefore, an individual’s phenotype, i.e. their ability to metabolize a specific …
Cell Culture Basics: Equipment, Fundamentals and Protocols
2024年1月24日 · Cell culture refers to the removal of cells from an animal or plant and subsequent cultivation in an artificial environment for scientific research. The first cell culture techniques were developed over 100 years ago and since then have contributed to tremendous breakthroughs in science. Today, it is a fundamental tool used in laboratories ...
SEM vs TEM - Technology Networks
2024年1月24日 · Even the basic microscope setup is different. In SEM, the sample, located at the base of the electron column, is scanned and the resulting electron scattering is analyzed to produce an image. In TEM, the sample is placed in the middle of the microscope and electrons pass through the sample before being collected.
UV-Vis Spectroscopy: Principle, Strengths and Limitations and ...
2023年12月18日 · 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 …