Previous Next It is important to note that not all bacteria have a cell wall. The two different cell wall types can be identified in the lab by a differential stain known as the Gram stain. Originally, it was not known why the Gram stain allowed for such reliable separation of bacterial into two groups. Once the electron microscope was invented in the s, it was found that the staining difference correlated with differences in the cell walls.
Neurophysiology Virtual Lab pilot Neurophysiology is the study of nervous system function.
Primarily, it is connected with neurobiology, psychology, neurology, clinical neurophysiology, electrophysiology, biophysical neurophysiology, ethology, neuroanatomy, cognitive science and other brain sciences.
Neuron Simulation Virtual Lab pilot This lab uses a graphical web-based Neuron simulator and models a section of excitable neuronal membrane using the Hodgkin-Huxley equations.
Various experiments will deal with the several parameters of Hodgkin-Huxley equations and will model resting and action potentials, voltage and current clamp, pharmacological effects of drugs that block specific channels etc. This lab complements some of the exercises in the Virtual Neurophysiology lab.
Biochemistry Virtual Lab I Biochemistry is the study of the chemical processes in living organisms. It deals with the structures and functions of cellular components such as proteins, carbohydrates, lipids, nucleic acids and other biomolecules.
The experiments included in Biochemistry Virtual Lab I are fundamental in nature, dealing with the identification and classification of various carbohydrates, acid-base titrations of amino acids, isolation of proteins from their natural sources, etc.
Biochemistry Virtual Lab II Biochemistry Virtual Lab II deals with topics like enzymology, purification of plant pigments and natural products as well as estimation of iodine value and saponification value of fats Cell structures and the gram stain oils.
Population ecology Virtual Lab I A population is a collection of individuals of the same species that live together in a region. Population ecology is the study of populations especially population abundance and how they change over time.
Crucial to this study are the various interactions between a population and its resources. Studies on simple models of interacting species is the main focus this simulation oriented lab. Population ecology Virtual Lab II Population ecology is the study of populations especially population abundance and how they change over time.
Studies based on models of predation, competition as seen in interacting species is the main focus this simulation oriented lab. Lab II focuses on applied principles of population ecology for PG students.
Immunology Virtual Lab I The branch of biomedicine concerned with the structure and function of the immune system, innate and acquired immunity, the bodily distinction of self from no self, and laboratory techniques involving the interaction of antigens with specific antibodies. Immunology Virtual Lab II The branch of biomedicine concerned with the structure and function of the immune system, innate and acquired immunity, the bodily distinction of self from no self, and laboratory techniques involving the interaction of antigens with specific antibodies.
Microbiology Virtual Lab I The study of microorganisms, which are unicellular or cell-cluster microscopic organisms. This includes eukaryotes such as fungi and, protists and prokaryotes.
Viruses, though not strictly classed as living organisms, are also studied. Microbiology Virtual Lab II To study the biochemical properties of microorganisms, the various techniques employed in cultivation of fungi and viruses along with the molecular level analysis of microbial genome.
This field overlaps with other areas of biology and chemistry, particularly genetics and biochemistry. Molecular biology chiefly concerns itself with understanding the interactions between the various systems of a cell, including the interactions between DNA, RNA and protein biosynthesis as well as learning how these interactions are regulated.
Cell biology Virtual Lab I Cell biology is an exciting and dynamic area that helps discover the fascinating world of cells. It includes the study of the structure and organization, growth, regulation, movements and interaction of the cells.
Cell biology is closely related to other areas of biology such as genetics, molecular biology, and biochemistry. Cell biology Virtual Lab II Cell biology is an exciting and dynamic area that helps discover the fascinating world of cells.
Bioinformatics Virtual Lab I Bioinformatics is a field which using techniques of informatics to gather, store, analyse and integrate biological data. This virtual lab is an introductory course for undergraduate students and deals with the storage and retrieval of data from different biological databases like Gene, Pubmed, GEO, TAIR, Prosite etc.
Bioinformatics Virtual Lab II This virtual laboratory is for undergraduate and postgraduate students to get a deeper understanding on the analysis of sequence data, its alignment and the evolutionary relationship.
The exercises mainly deal with the different algorithms in sequence alignment and provides a computational exploration to the use of various tools used for sequence alignment.
This lab is targeted towards PG students with exercises that will allow one to learn visualising proteins in 3D, how to calculate distance among atoms, find active sites in protein structures and also delve into some structural analysis methods including docking and homology modeling.
Combining labs 1, 2 and 3 will give an overall understanding of commonly used computational methods in bioinformatics. Ecology Virtual Lab Ecosystems are a complex and delicate balancing game.
Ecosystems have an extremely complex web of cause and effect. The addition or removal of one species affects many other species with which it might compete for,or provide food.
Bio-inspired Robotics Virtual Labs Remote Trigger This remote-triggerable online laboratory will teach experiments and offer to introduce biorobotics and neuronal robot techniques. The focus is on practical skills in using simple electronics to reinforce application of bio-inspired ideas.Gram staining is a differential staining technique that differentiates bacteria into two groups: gram-positives and gram-negatives.
The procedure is based on the ability of microorganisms to retain color of the stains used during the gram stain reaction. Gram-positive and Gram-negative organisms differ drastically in the organization of the structures outside the plasma membrane but below the capsule: in Gram-negative organisms these structures constitute the cell envelope, whereas in Gram-positive organisms they are called a cell wall.
based on cell wall structure and susceptibility to gram staining What are the characteristics of gram positive bacteria? thicker peptidoglycan layer in their cell walls, prevents washing out of the dye crystal violet with ethanol, stain purple, gram .
primary stain at the decolorizing step and appear as Gram-negative cells. The timing of the steps of the Gram stain is not critical but depends on the density of the cell suspension applied to the slide and the nature of the bacterial culture.
The Gram stain is a technique devised to categorise most bacteria into two sub-categories; gram positive and gram negative, based on the properties of the cell wall.
Cell wall The cell wall’s characteristics determine Gram staining. A chemical that helps retain the stain in certain cells, such as iodine added to crystal violet stain. Differential Stain Makes use of two or more dyes and distinguishes between two kinds of organisms or between two different parts of an organism.