Displaying articles by tag: Cell Biology

BS Media in Cell Biology
Wednesday, 07 June 2017 17:29

STRUCTURE AND FUNCTION OF CELL NUCLEUS

In 1832 "Robert Brown" discovered nucleus. It is the essential part of the cell.   A definite nucleus is absent in prokaryotic cell. Instead of it a DNA molecules is present. It is called by “Prokaryotic cell". Ex: Bacteria.   Definite nucleus is present. It is cov­ered by nuclear membrane.…

  • Cell Biology
  • Zoology
  • Zoology Notes
  • Notes
  • Article
  • Structure of Nucleus
  • Functions of Nucleus
Read 9888 times
BS Media in Cell Biology
Wednesday, 07 June 2017 13:31

STRUCTURE, TYPES AND FUNCTIONS OF ENDOPLASMIC RETICULUM

In the cytoplasm of the cell complex membrane bounded system is present. It was called cytoplasmic vacuolar system by "Sacz & De robertis" in 1975. This system contains endoplasmic reticule, nuclear envelop, and Golgi.   Endoplasmic Reticulum (E.R.) was first observed by "Porter, Claude, Fullam" in 1945.   Occurrence: In…

  • Cell Biology
  • Zoology
  • Zoology Notes
  • Notes
  • Article
  • Structure of Endoplasmic Reticulum
  • Types of Endoplasmic Reticulum
  • Functions of Endoplasmic Reticulum
Read 5457 times
BS Media in Cell Biology
Wednesday, 07 June 2017 07:17

STRUCTURE AND FUNCTIONS OF GOLGI APPARATUS (GOLGI BODY)

In the animal and plant cells clus­ters of fat filled structures are present. They are called Golgi apparatus or complex. In 1898 Camillo Golgi' recognised it in the nerve cell of the owl. The Golgi complex of invertebrates is called dictyo­some.   Occurence: Golgi complex is seen in all eukaryotic…

  • Cell Biology
  • Zoology
  • Zoology Notes
  • Notes
  • Article
  • Structure of Golgi Apparatus
  • Functions of Golgi Apparatus
Read 15968 times
BS Media in Cell Biology
Wednesday, 07 June 2017 06:35

STRUCTURE AND FUNCTIONS OF LYSOSOMES

Lysosome:   These are first ob­served in liver cells. They are 1.5 to 2 milii micron in size These are single mem­brane bounded structures. They were first called pericanalicular-dense bodies. "Chris­tian De Duve" called them lysosomes in 1955. They were named as lysosomes because they contain hydrolytic enzymes.   Occurence:…

  • Cell Biology
  • Zoology
  • Zoology Notes
  • Notes
  • Article
  • Structure of Lysosomes
  • Functions of Lysosomes
Read 7127 times
BS Media in Cell Biology
Tuesday, 06 June 2017 19:18

STRUCTURE AND FUNCTION OF MITOCHONDRIA

DEFINITION OF MITOCHONDRIA:   Mitochondria are center for cellular respiration. It converts chemical energy into kinetic energy.   Information About Mitochondria   In 1857 Kolliker observed mitochondria and called them as sarco-somes. Flemming called them as Fila. Altmann in 1890 called them as Bioplasts. Benda gave the name mito-chondria. Porter…

  • Cell Biology
  • Zoology
  • Zoology Notes
  • Notes
  • Article
  • Structure of Mitochondria
  • Functions of Mitochondria
Read 46726 times
BS Media in Cell Biology
Tuesday, 06 June 2017 18:27

STRUCTURE AND FUNCTIONS OF CELL MEMBRANE (PLASMA MEMBRANE)

The cytoplasm of the animal cell is bounded by a thin limiting membrane called "Cell membrane".   Nageli and Cramer called this membrane as cell membrane in 1855. In 1931 "Plowe" named this as plasmalemma. Modem cell biologists prefer to call it plasma membrane (According to De Robertis). Danielli &…

  • Cell Biology
  • Zoology
  • Zoology Notes
  • Notes
  • Article
  • Structure of Cell Membrane
  • Functions of Cell Membrane
Read 4191 times
BS Media in Cell Biology
Tuesday, 06 June 2017 17:14

AN ANIMAL CELL STRUCTURE

Cell is a fundamental, structural and functional unit of living organism. The science which deals with cells and their organelles is called cell-biology. The term cell was first used by Robert Hooke in 1665. He described the cell first as cella which means hollow space. Robert Hooke observed cells in…

  • Cell Biology
  • Zoology
  • Biology
  • Article
  • Notes
  • Zoology Notes
  • Structure of Animal Cell
Read 6767 times
BS Media in Cell Biology
Monday, 05 June 2017 19:19

Differences between Prokaryotic Cell and Eukaryotic Cell

Serial No. Feature Prokaryotic Cell Eukaryotic Cell 1. Nuclear envelope absent present 2. DNA single, circular and naked more than one and combined with proteins 3. Chromosome single multiple 4. Nucleolus absent present 5. Division amrtosis mitosis or meiosis 6. Ribosomes 70S(50S+30S scattered in cytoplasm 80S(60S+40S) Found attached to ER…

  • Cell Biology
  • Notes
  • Article
  • Zoology
  • Zoology Notes
  • Differences between Prokaryotic Cell and Eukaryotic Cell
Read 5984 times
BS Media in Cell Biology
Monday, 05 June 2017 19:08

BASIC STRUCTURE OF A PROKARYOTIC CELL

The cells which lack true nuclear membrane are called prokaryotic cells. Blue green algae, bacteria are the examples for prokaryotic cells.   Prokaryotic cells lack chloroplasts mitochondria, Golgi complex and endoplasmic reticulum.   Prokaryotic cells are simple and primitive cells.   In blue green algae cell shows a cell wall,…

  • Zoology
  • Zoology Notes
  • Notes
  • Article
  • Cell Biology
  • Structure of Prokaryotic Cell
Read 6978 times
BS Media in Cell Biology
Monday, 05 June 2017 18:46

AN INTRODUCTION TO CELL BIOLOGY (BRIEF HISTORY OF CYTOLOGY)

Cell Biology (Gr., kytos-hollow vessel or cell, logos-to discourse) is a biological science which deals with the study of cells. The cell itself can be regarded as the vital unit of organisms. 'Aristotle' and 'Paracelsus' concluded that "all animals and plants, however, complicated are constituted by few elements which are…

  • Cell Biology
  • Introduction to Cell Biology
  • History of Cytology
  • Notes
  • Zoology
  • Zoology Notes
  • Biology Notes
  • Biology
Read 5207 times
Dayyal Dg. in Cell Biology
Thursday, 25 August 2016 20:05

Cyanmethemoglobin (Hemoglobin-Cyanide) Method for Estimation of Hemoglobin

When Blood is mixed with a solution of potassium cyanide, potassium ferricyanide, and Drabkin’s solution, the erythrocytes are lysed by producing evenly disturbed hemoglobin solution. Potassium ferricyanide transforms hemoglobin into methemoglobin, and methemoglobin combines with potassium cyanide to produce hemiglobincyanide (cyanmethemoglobin). This method is optional for estimation of hemoglobin and…

  • Cell Biology
  • Microbiology
  • Hemotology
  • Zoology
  • Article
  • How to
  • Hemotological Tests
  • Cyanmethemoglobin Method
  • Cyanmethemoglobin Method Procedure
  • Cyanmethemoglobin Apparatus
  • Cyanmethemoglobin Reagent
  • Cyanmethemoglobin Standard
  • Cyanmethemoglobin Standard Solution
  • Cyanmethemoglobin Method Sources of Error
  • Cyanmethemoglobin MSDS
  • Cyanmethemoglobin Method Hemoglobin Estimation
Read 48602 times
Dayyal Dg. in Cell Biology
Friday, 29 July 2016 06:56

Sahli’s Acid Hematin Method for the Estimation of Hemoglobin

When blood is mixed with an acid solution, the hemoglobin converts into the brown-colored acid hematin. The acid hematin is then diluted with distilled water till the color of the acid hematin matches that of the brown glass standard. The hemoglobin is estimated by reading the value directly from the…

  • Cell Biology
  • Microbiology
  • Hemotology
  • How to
  • Article
  • Hemotological Tests
Read 31277 times
Dayyal Dg. in Cell Biology
Tuesday, 19 July 2016 19:38

What is Hemoglobin? Types, Indications and Methods

HEMOGLOBIN Hemoglobin is composed of heme (iron + protoporphyrin) and globin polypeptide chains. It is present in the red blood cells of all vertebrates except Channichthyidae (the family of fish: white-blooded fish also called crocodile fish found in southern South America and the Southern Ocean around Antarctica). It carries oxygen…

  • Hemotology
  • Microbiology
  • Zoology
  • Cell Biology
  • How to
  • Article
  • Hemotological Tests
Read 9165 times
Dayyal Dg. in Cell Biology
Tuesday, 19 July 2016 09:02

Red Cell Indices

Red Cell Indices Red cell indices are mean cell volume (MCV), mean cell hemoglobin (MCH), and mean cell hemoglobin concentration (MCHC). They are also called as “absolute values”. They are derived from the values of hemoglobin, packed cell volume (PCV or hematocrit), and red cell count. Red cell indices are…

  • Cell Biology
  • Microbiology
  • Article
  • How to
  • Hemotology
  • Hemotological Tests
Read 5229 times
Dayyal Dg. in Cell Biology
Monday, 23 May 2016 19:40 Featured

How to Count Reticulocytes (Manual Method)

Reticulocytes Reticulocytes are young or juvenile red cells released from the bone marrow into the bloodstream and that contain remnants of ribonucleic acid (RNA) and ribosomes but no nucleus. After staining with a supravital dye such as new methylene blue, RNA appears as blue precipitating granules or filaments within the…

  • Cell Biology
  • Hemotology
  • Microbiology
  • Article
  • How to
  • Hemotological Tests
Read 18152 times
Dayyal Dg. in Cell Biology
Monday, 23 May 2016 19:16

Reticulocyte

Reticulocytes are young or juvenile red cells released from the bone marrow into the bloodstream and that contain remnants of ribonucleic acid (RNA) and ribosomes but no nucleus. After staining with a supravital dye such as new methylene blue, RNA appears as blue precipitating granules or filaments within the red…

  • Cell Biology
  • Microbiology
  • Article
  • How to
  • Hemotological Tests
Read 6266 times