Your Cart

Shopping Cart Items: 0   Sub-Total : US$0.00    View Cart    Checkout
Shopping Cart Items: 0   Sub-Total : US$0.00
Welcome, Guest ( Login )
Celebrating 34 years providing high quality products and advice.
Our Local Time Is 12:26:10 AM.
Call us at 818-786-0600. We are here to help!
Millipore and Barnstead Laboratory Water Filtration Need a New Laboratory Water System?
We have many to choose from. We can save you thousands on
Complete Systems and replacement filters for most brands.
Laboratory Water Systems Laboratory Process Filters Laboratory Equipment Water Treatment

General Use of Water In Research and Medicine

In biological and chemical laboratories distilled water is the most often used form of water. Most often used to dilute aqueous solutions in order to get them to specific concentrations. Distilled water is also used in titrations. Distilled water is also used in preparing nutrient media most standard laboratory solutions fixatives and biological staining.


One popular biological stain is known is hematein. It is made by oxidizing an organic material that is extracted from logwood. When used ina distilled solution hematein can be used to differentiate cell nuclei from protoplasm for viewing using a microscope. The process involves using a fixed washed section of tissue then immersing it in a solution of hematein at a known strength. After a certain amount of time being immersed in the solution the tissue is removed and rinsed off to remove the excess stain. Then it is passed through a series of successive distilled water-ethyl alcohol baths gradually increasing the concentration of alcohol until the final bath is 100 percent alcohol.


It is at this point that virtually all of the water has been removed from the tissue and replaces by the alcohol. The next step is to remove the alcohol and replace it with xylene. Xylene is a paraffin solvent. After a succession of melted paraffin baths at 50-60oC the paraffin displaces the xylene. After this step the tissue is embedded in a block of solid paraffin. This readies it for slicing with a microtome to the thickness of only a few microns.


Then using distilled water with small pools of albumin the paraffin embedded tissues samples are floated on the small pools of albumin in the water. Each one is about the diameter of a nickel and centered on a glass microscope slide then placed on the warm bed of a special hot plate. The heat causes the paraffin to flatten out and bond with the glass as the water evaporates. What is left behind is the albumin which now acts as a transparent adhesive or glue.


Once the specimens in paraffin are firmly in place on the slides they are then placed on a rack and dipped in xylene to remove the paraffin. Upon completion of this step and the paraffin has been replaced by xylene each small thin section of tissue get a drop of Canada balsam and is covered by a paper thin cover glass. The slide is then baked for a day or two at 45o to 50oC. This process hardens the balsam and thus making the tissue ready for study. Before each use the slides can rinsed with distilled water to eliminate dust and water spots which impair viewing under a microscope.

Primer: Water Use In Research And Medicine
  • Water The Cleansing Agent
  • Water Use In Tissue Cell Culture
  • Water Usage In Pharmaceuticals
  • Pyrogens In Research And Medicine
  • Water Use In Blood Fractionation
  • Water Use In Cryobiology
  • General Use of Water in Research and Medicine


    • Open To The Public

    Why Use APS??

    Independent Reps Wanted

    Need Live Help?

    Contact Us
    818-786-0600

    Short Lead times.
    Lab Water Deionizer




    P12XL4
    APS Polaris XL 4 Lab Water System

    Retail Price : US$6,499.00
    Todays Price : US$4,650.00



    P2D2-M
    APS Polaris D2 Water System with Quality Meter

    Retail Price : US$2,966.00
    Todays Price : US$2,570.25



    P2D3-M
    APS Polaris D3 Water System with Quality Meter

    Retail Price : US$3,496.94
    Todays Price : US$2,830.20



    P2D1-M
    APS Polaris D1 Water System with Quality Meter

    Retail Price : US$2,118.94
    Todays Price : US$1,761.72
    PreviousNext
    APS Polaris XL 4 Lab Water System
    APS Polaris XL 4 Lab Water System


    TAKING PRE-ORDERS
    Short lead Time. 


    This high capacity four housing lab water system is designed to provide up to 3 l.p.m. of ultrapure water exceeding ASTM and CAP Type I, II or III specifications.

    See all Polaris Systems Here

    PROUDLY MADE IN THE USA


    US$4,650.00 Details
    APS Polaris D2 Water System with Quality Meter
    APS Polaris D2 Water System with Quality Meter

    This dual housing is designed to provide 1 g.p.m. of ultrapure water exceeding ASTM and CAP Type II specifications.  

    Comparable to Barnstead D4521

    Operating Manual

    See all Polaris Systems Here


    PROUDLY MADE IN THE USA

    Dimensions :  18" W X 28" H X 6" D

    US$2,570.25 Details
    APS Polaris D3 Water System with Quality Meter
    APS Polaris D3 Water System with Quality Meter

    This high capacity triple housing is designed to provide 1 g.p.m. of ultrapure water exceeding ASTM and CAP Type II specifications.  

    Operating Manual

    See all Polaris Systems Here


    PROUDLY MADE IN THE USA

    Dimensions : 23" W X 28" H X 6" D

    US$2,830.20 Details
    APS Polaris D1 Water System with Quality Meter
    APS Polaris D1 Water System with Quality Meter

    This compact single housing is designed to provide 1 g.p.m. of ultrapure water exceeding ASTM and CAP Type II specifications.  

    Comparable to Barnstead D4511

    See all Polaris Systems Here


    PROUDLY MADE IN THE USA

    Dimensions : 12" W X 28" H X 6" D

    Operating Manual

    US$1,761.72 Details
    PreviousNext

    Best
    Lab Water System




    50132373
    Barnstead MicroPure UV

    Retail Price : US$6,750.00
    Todays Price : US$5,737.50



    50132374
    Barnstead MicroPure UV-ST

    Retail Price : US$7,060.00
    Todays Price : US$6,283.40
    PreviousNext
    Barnstead MicroPure UV
    Barnstead MicroPure UV

    Barnstead MicroPure Laboratory Water Purification System - Provides Type I Ultrapure Water.

    Systems come with the filters.

    Replacement filters

    This is the replacement for the popular EasyPure UV LF systems.

    Operating Manual

    US$5,737.50 Details
    Barnstead MicroPure UV-ST
    Barnstead MicroPure UV-ST

    Barnstead MicroPure Laboratory Water Purification System - Provides Type I Ultrapure Water.

    Systems come with the filters.

    Replacement filters

    This is the replacement for the popular EasyPure UV RF systems.

    Operating Manual

    US$6,283.40 Details
    PreviousNext

    Top Sellers

    Most Popular
    Fume Hoods




    100400041
    4 foot Protector Premier Laboratory Hood

    Retail Price : US$14,760.00
    Todays Price : US$13,284.00



    100400071
    4' Protector Premier Laboratory Hood

    Retail Price : US$17,640.00
    Todays Price : US$15,876.00



    100400081
    4' Protector Premier Laboratory Hood

    Retail Price : US$17,640.00
    Todays Price : US$15,876.00



    100400090
    4' Protector Premier Laboratory Hood

    Retail Price : US$16,535.00
    Todays Price : US$14,881.50
    PreviousNext
    4 foot Protector Premier Laboratory Hood
    4 foot Protector Premier Laboratory Hood

    with built-in blower with 2 service fixtures, 100-115V, 60 Hz

    US$13,284.00 Details
    4' Protector Premier Laboratory Hood
    4' Protector Premier Laboratory Hood

    Labconco Brand Product - with built-in exhaust blower and 2 service fixtures, explosion-proof

    US$15,876.00 Details
    4' Protector Premier Laboratory Hood
    4' Protector Premier Laboratory Hood

    Labconco Brand Product - with built-in exhaust blower and 2 service fixtures, explosion-proof

    US$15,876.00 Details
    4' Protector Premier Laboratory Hood
    4' Protector Premier Laboratory Hood

    Labconco Brand Product - with built-in exhaust blower, explosion-proof

    US$14,881.50 Details
    PreviousNext

    Glassware Washers




    4595400
    Base Stand

    Retail Price : US$1,171.83
    Todays Price : US$996.06
    PreviousNext
    Base Stand
    Base Stand

    Labconco Brand Product - For SteamScrubber and FlaskScrubber

    US$996.06 Details
    PreviousNext

    Best New Product
    Lab Water Reverse Osmosis System

    Lab/Commercial
    Reverse Osmosis System
    Great for Lab Water Pretreatment
    or Great Drinking Water
    Images are representative of the products. Images may or may not be of the actual product. If it is important e-mail us for an actual image if available.

    * Flat Rate UPS shipping when able to ship via UPS and is in the USA excluding Hawaii and Alaska.
    Larger Items may not be able to ship via UPS, in that case freight charges will be quoted seperately.
    International shipping will be quoted after the order is placed. You will have the opportunity to cancel before we finalize your order.

    Terms and conditions
    Credit Application
    Privacy Policy
    Google Apps
    List All Products