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Manufactured in the U.K., the QWS4 combines performance and reliability with exceptional value for money. This new water still incorporates a number of operational and safety features that make this still the ideal choice for your laboratory. • Output capacity 4Litres/Hour pyrogen free* single distilled water • Distillate quality complies with European Pharmacopoeia for Purified Water & A.S.T.M. Type 4. • Pyrex® glass boiler and condenser minimise potential contamination of distillate from the leaching effect of distilled water on metal components • Distillate pH5.0-6.5 • Distillate conductivity 3.0-5.0uS/cm • 3kW chromium plated heating element with 2 independent re-settable thermostats protect the still in the event of water supply failure • Easy to clean. No glassware dismantling is required • Available in 230V, 220V and 120V versions. Output capacity of 120V model is around 2.4Litres/Hour • Can wall or bench mounted • CE marked by independent testing agency • Supplied with an instruction/operating manual • All of the major components are available as spare parts *We recommend that the distillate is tested before use
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Head
Trinocular, 30° inclined, 360°rotating
Eyepiece
WF 10x/20
Nosepiece
Quintuple, reversed
Objectives
IOS N-PLAN 4x, 10x, 20x, 40x, 100x (oil/water)
Stage
Double layer, 233×147 mm, moving range 78×54 mm, X-axis rackless
Focusing
Coaxial coarse and fine, limit stop
Condenser
Abbe N.A. 1.25, iris diaphragm, focusable and centrable
Illuminator
Transmitted: 3.6 W X-LED³, manual brightness control
Incident: High-power blue LED
1 There are twelve tubes in two basket assembly.
2 Each test station is driven independently. Auto stop at timing point.
3 The bath liquid can achieve an even temperature.
4 A MPU is used to automatically control the temperature, time and frequency of nacelle back and forth.
5 Timing at will. The preset and real time data can be displayed alternately in time.
6 Automation: auto-test, auto-diagnose, auto-alarm.
The Neon® Transfection System enables fast and efficient delivery of nucleic acids into all mammalian cell types, including primary, stem, and difficult-to-transfect cells. The flexible and open system allows the user to perform high-quality transfections using optimized or user-defined protocols in three simple steps with as few as 2 × 104 cells per reaction. A novel reaction chamber provides a dramatic increase in transfection efficiency and cell viability. The Neon® Transfection System is:
• Efficient—up to 90% in many cell types, including difficult-to-transfect cells, primary, and stem cells
• Flexible—easily transfect from 2 × 104 cells to 6 × 106 cells per reaction
• Simple—easy to use, with a single reagent kit for all cell types
• Versatile—open system allows electroporation parameters to be optimized freely
Haemometers are used for the determination of blood’s content of haemoglobin. The Marienfeld Superior haemometer according to Sahli is supplied as complete set consisting of:
polystyrene support with 2 coloured rods and opal glass plate
comparator tube
haemoglobin pipette 20 μl acc. to Sahli
silicone tubing of approx. 16 cm length
white mouthpiece
dropping pipette with rubber teat
stirring rod
acid vial
cleaning brush
directions for use
without CE – mark, only for sale and application outside EC
The Home LED Microscope is an excellent value and wonderful choice for beginners and students of all ages! With this home microscope, you’ll get the same quality and features as other fine high-school-level microscopes, but at a much more affordable price. Its ease-of-use and high-quality components make it a great choice for students, science-lovers, and hobbyists of all ages!
The 24″ tall, 7 1/4″ diameter tank comes filled with 13 lbs. of our exclusive ion-exchange resins that remove minerals from the water through a process that binds them to the resin. Because the majority of the impurities are dissolved, deionization produces highly purified water, so no more spots! The two valves control the water flow through the filter. This allows you to bypass the filter when it is not needed to prolong the life of the resin. Add our Stainless Steel Quick Disconnect Set for faster, easy use. The life of the resin depends upon the amount of total dissolved solids (TDS) in your water. Want to know your TDS level? Check out our easy-to-use TDS Meter. The replacement resin is safe, disposable, and easy to install.
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