MicroscopesBlog: Expert's reviews, news, notes on Microscopes, Centrifuges, Lab Coats, Pipettes, Lab Safety, & more Lab Products!
Friday, February 05, 2010
Antimicrobial Drugs
Antimicrobial drugs belong to a class of chemotherapeutic agents used to treat infectious diseases. Antimicrobial drugs act within the host and target the harmful organism without affecting host cells. This is known as selective toxicity. Synthetic drugs are synthesized in the laboratory while antibiotics are produced by microorganisms. Dr. Paul Ehlrich of Germany discovered what he considered a "magic bullet" that would destroy harmful microorganisms but not the host. He eventually found salvarsan, an arsenic derivative, that was useful against syphilis. Penicillin is an antibiotic and was first discovered in 1928 by Alexander Flemming. Antimicrobial drugs can be classified by their range of efficacy. If a drug affects few bacteria it is known as a narrow spectrum drug as opposed to broad spectrum drugs that affect a wide range of bacteria. Antibiotics may eliminate normal microbiota or "good bacteria" and allow opportunistic pathogens to flourish. This is known as a superinfection. Axygen, Bel-Art, and Kimberly Clark all supply products used in antimicrobial drug research.
Posted by Paul at 2:17 PM Read Article 0 comments 

Tuesday, February 02, 2010
The Princess and the Frog
©2009-2010 *Spiritwollf. Okay when we think of frogs we probably think of the old fairytale or the new Disney Movie, The Princess and the Frog; however there is another side to frogs that we look at in Science Class at school, the process is called dissecting a frog. For some not so glamorous as looking at the frog in this photo. The materials that you need for dissecting a frog in class are, safety goggles, dissecting kit, dissecting pins, laboratory gloves, lab apron, or lab coat, tweezers, scissors, dissecting probe, preserved frog, dissection tray, and a magnifying lens. Dissection of a frog is not that bad as long as you have the right tools which I mentioned above. Its a great first science lab project. Your objective is to locate and describe the organs found in the frog. You will be asked to name locate and identify the organs that make up the various systems of the frog and probably compare the frogs organs to human organs. Did you know that frogs are amphibians? They can live in water and on land. Either way you look at it, each example the Princess and the Frog fairytale tells a story about a prince that has been cursed and turned into a frog, the only way he can be freed of his curse is to be kissed by the Princess, and the Science Lab project of dissection of the frog also tells us a story through dissection and examination. This is great time in your life, Science labs are a fun time! Pay attention in class and take notes! All will go well for you.Friday, January 29, 2010
Helminths
Helminths are multicellular eukaryotic animals. Many are parasitic. Helminths can be dioecious (male and female individuals) while some are hermaphroditic (having male and female reproductive organs). The definitive adult harbors the sexually mature adult helminth while intermediate hosts may be necessary for developmental stages. Platyhelminths or flatworms are flattened from front to back. The digestive system is incomplete as there is an opening for food to enter and an opening for waste to exit. Trematodes or flukes have flat leaf shaped bodies with a ventral sucker and an oral sucker to hold them in place and suck fluids from the host. They also obtain food by absorption through their cuticle. Cestodes or tapeworms are intestinal parasites. The nematodes or roundworms are cylindrical and tapered at the ends. They have a complete digestive system and many human parasites are found in this group. LOMO, Konus, and Greiner Bio-One make products used in parasite research.
Tuesday, January 26, 2010
Pirates Walk the Plank in Style!
I'm not talking about pirates; however I am going to talk a little bit about Plankton, that can be found in the Ocean. Plankton is carried through the ocean through the current. Plankton consists of various microscopic creatures. Did you know that Plankton is the most prevalent life and food source in the ocean? Phytoplankton, which carries on photosynthesis near the ocean surface, serves as food for the zooplankton and fish. Plankton are microscopic animals (zooplankton) and algae (phytoplankton) that live in the ocean. They drift on currents and provide food for many ocean residents. Get this, A mouthful of seawater may contain millions of bacterial cells, hundreds of thousands of phytoplankton and tens of thousands of zooplankton. Yuk! Don't want to swallow ocean water; however you may want to explore just a drop of it under a microscope. What you will find are amazing, super small, microscopic living sea plants and creatures. Magnify your sample of ocean water by 25X and you will be amazed of the living plants and animals, residents of the ocean that you will be able to see. You will need a compound microscope, some microscope slides and microscope cover slips to view your sample properly. If you want to work in the field, right by the ocean, you could use a Nikon Mini Field Microscope, perfect for on the go field work! It's water resistant and has a 20X magnification, it's compact and lightweight. A perfect microscope for the vacationer. For the beginner, I would suggest the Unico brand microscope. Unico offers an M16 a perfect microscope for the youngster interested in a hobby using microscopes to view parts of the world they cannot begin to imagine exist through the naked eye alone! Good Luck Beginners! Have a wonderful time learning new things about our oceans and the species within.Friday, January 22, 2010
Algae
Algae are photosynthetic autotrophs, they use light to convert atmospheric carbon dioxide into carbohydrates for energy. The body of the multi-cellular alga is a thallus, which may collectively function as holdfasts to anchor them. They often have stemlike stipes and leaflike blades. Algae also have gas filled bladders. There are different types of algae. Brown algae may be 50 meters in length. Red algae are branched and multicellular and live at greater depths than do other algae. Dinoflagellates are unicellular algae and are referred to as plankton because they are free floating. Some produce neurotoxins that are ingested by shellfish and can eventually poison humans. Algin is a food thickener and used in the production of goods and is extracted from the cell walls of algae. A large increase in plankton is known as a bloom. Blooms of dinoflagellates are known as red tides. G-Biosciences, Himedia Laboratories, and Agilent Technologies supply products used in algae research.
