Blog posts list

All living organisms fall into one of two categories: Eukaryotes (plants, animals, and fungi) or Prokaryotes (bacteria and archaea). Prokaryotes are unicellular organisms that don’t…

Animal and plant cells are eukaryotic cells. They all have nuclei, cell membranes, and organelles (ER, Golgi, ribosomes, and mitochondria). The structures only in plant…

Kohler illumination is a technique that ensures even illumination of the specimens. It requires a collector lens, field diaphragm, condenser diaphragm, and condenser lens.

Microorganisms are microscopic organisms that include bacteria, archaea, and protist (protozoa, protophyta, and mold). They can be unicellular, multicellular, or cell clusters.

Tardigrades, also known as water bears, look like chubby, microscopic bears walking slowly with eight short legs. The tardigrade is a famous extremophile that can…

Rotifers are multicellular (~1000 cells) animals and 100-500 μm in size. Rotifers got their name because the movement of the coronae of cilia around their…

Lysosomes are small organelles that work as the recycling center in the cells. Many lysosomal digesting enzymes break down macromolecules, so they can be reuse…

Mitochondrion is a rod-shaped organelle and its function is to generate energy (ATP) for the cell. Mitochondria contain their own DNA that enconde 13 proteins.

Ribosomes are complex molecular machines that make proteins inside cells. Ribosomes consist of two subunits – larger and smaller, made by a complex of RNA…

Three types of microscopes: light microscopes (compound, stereo, inverted, fluorescence, confocal, and super-resolution microscope), electron microscope, and scanning probe microscopes.

A simple microscope is the earliest type of microscope. It has only one lens and functions as a magnifying glass. Compound microscopes use two convex…

Microscope parts include eyepiece (10x), objective lenses (4x, 10x, 40x, 100x), fine and coarse focus, slide holder, condenser, iris diaphragm, illuminator, and specimen stage.

A microscope is an instrument to see objects that are too small to be seen by the naked eye. Microscopes are made up of a…

Diatoms are free-floating unicellular algae in oceans and freshwater. Their cell walls are made of silica, giving them colorful and opal-like appearances.

Green algae are a diverse group of photosynthetic eukaryotic organisms. It includes unicellular and multicellular algae, such as seaweeds.

Euglena is a single-celled eukaryote with flagella and it shares some characteristics of both plants (chloroplasts) and animals (flagella and eating).

Ferns are vascular plants. Unlike other vascular plants that reproduce via seeds and flowers, ferns reproduce via spores and have neither seeds nor flowers.

The vacuole is a membrane-bound organelle that is present in all plant cells. The main function is for storage, defense, and acting as a space…

The chloroplast main function is to convert energy from the Sun into glucose for growth, a process called photosynthesis. They are in plants and certain…

Nucleus is a double-membrane organelle, and it controls cell activities and carries genetic information to pass to the next generation.

A fluorescence microscope is an optical microscope that uses fluorescence instead of other light properties to generate an image.

Golgi apparatus is a membrane-bound organelle found in most eukaryotic cells. The function of Golgi apparatus is to process proteins and send proteins to different…

Cytoplasmic streaming is the movement of the cytoplasm within a cell. It plays an important role in transporting essential molecules across big cells.

Have you ever seen sand under a microscope? If not, come to join us. This post showed you how to observe sand under a microscope.

An organelle is a tiny cellular structure that performs specific functions within a cell, such as a nucleus, mitochondria, ER, ribosomes, lysosomes and Golgi.

Plant cells share many organelles in common with animal cells. There are three unique features in plant cells, cell wall, vacuole, and chloroplast.

Microscopy stains enhance the visualization of cells and cell parts under a light microscope. Methylene Blue, Eosin Y, Bismarck Brown Y, Janus Green B, Neutral…

We discuss the place where to find paramecium, how to make paramecium culture at home, how to look at paramecium under a microscope.

Our idea is to cover the microscope parts that each user may touch with plastic wrap. Between two users, the plastic wrap cover will be…

Paramecium reproduction, aging, learning and memory ability, movement, sensing, feeding behaviors, and their endosymbiotic relationship with algae.

Carefully lower the coverslip slowly with an angle. This permits air to escape from the other side so you can make a bubble free microscope…

This post discusses the biology, the structure, the stereo and compound microscopic view of hairs, and its application on forensic science.

Paramecium uses cilia for movement. It contains two types of nuclei, Macronucleus for gene expression and Micronucleus for genetic material storage.

Were images taken by electron microscopes? You will learn how to recognize images from EM and the difference between SEM and TEM.

Paramecium is a unicellular organism with a shape resembling a slipper and 50-300 µm in length. It belongs to Chromista kingdom.

A picture is worth a thousand words. I want to share with you 6 science humor images that make me smile. – and also the…

Mitosis is a process of cell division, one cell divides and produces two new cells that are genetically identical.

Cell division is necessary for the growth of organisms, repair of damaged tissues, healing and regeneration, and reproduction.

Autophagosomes break down the misfunctioned organelles and recycle the nutrient. Endosomes bring outside material into cells.

I am often amazed by the delicate structure of the cross-section of the plant stems under the microscope. Various sizes of cells arranged in an…

Guide to plant anatomy and biology using microscope premade slide sets. We can observed roots, cross section of stems, leaves, pollen grains and seeds.

Use this guide to build a creative animal cell model using household items. You will be amazed how much cell biology you will learn.

We choose fruit and vegetable to create our own cell model project. For example, we choose avocado seed for representing the cell nucleus.

A step-by-step guide to make your bacteria handprint. Bacteria colony morphology differs in shape, size, color, and margin.

Biological stains are used for better visualization of microscope specimens. Some pet medicine at your home and food-coloring dye can be used as well.

Wondering how Amoeba moves? We have educational videos of the Amoeba movement and what to see inside the Amoeba under the microscope.

Bacteria are hard to see because they are tiny and colorless. One way is to use a Gram stain. The steps are crystal violet, iodine,…

They are cheek cells, onion skin, yeast cells, mold, eggshell membrane, water bears, pond water microorganisms, pollen, salt, sugar, pepper, and soap form.

Patients with mild or no symptoms can still spread their viruses. The current diagnosis method is Real-Time PCR and the antibody-based diagnosis is coming soon.

We found water bears on the dry moss, frozen lichens on the trees and rocks. In addition, we found rotifer, nematode, and ciliates.

Most cells are visible under a light microscope, but mitochondria and bacteria are barely visible. An electron microscope is required for virus and DNA.

No. Viruses are too small to be seen with an optical microscope. An electron microscope is required to see viruses.

How to choose the right microscope for your need. We discuss types of samples are suitable for the compound microscope vs. stereo microscope.

Best tips you should know to take care of your microscope. This post includes how to use oil lens and immersion oil to get higher…

Everything you need to know to use a hemocytometer to count cells, cell concentrations, cell viability, blood cell compositions and the number of sperms.

This post covers what is microscope immersion oil, why do you need it, when and how to use a microscope immersion oil.

Nikon is one of the world famous companies manufacturing camera and microscope. It recently announced the result of their annual Small World Photomicrography Competition, now…

2020 Rs’ Science calendar: images of vascular bundle of plant stem, green algae, frontal section of corn seed, Amoeba, diatom, macrophages, fish red blood cells,…

Microscopes are important to study biology. We discuss light microscopes, fluorescent microscopes, and electron microscopes.

A step by step guide for growing your own yeast and for counting the number of yeast cells using a hemocytometer.

We saw amazing plankton tiny creatures in pond life, including ciliates, rotifers, Amoeba, Tardigrades (water bears), worms, and planarians.

Guide to do scale casting with clear nail polish to see microtopography. We demonstrated plant leaves and hairs as examples.

A step-by-step guide to use a microtome to create an amazing cross section of plant stem.

Step-by-step guide for onion dissection to get plant cells, so you can look at plant cells under the microscope.

A step by step guide to show you how to mount a slide for microscope using your cheek cells as an example. We discuss the…

Prepare a working space and protect yourself. This is an essential step for all science.

A microscope guide for beginners: We discussed microscope parts; how to use a microscope; and the most common questions for microscopy.