pH Paper and other Test Strips
Single-use test materials used to rapidly and semi-qualitatively determine the acidity or alkalinity of liquids or to measure another parameter or substance; may include tests for starch, chlorine, and molybdenum; usually via the use of color-based reactions.
pH Papers, pH strips, pH sticks, and pH test kits are used in laboratory, industrial, and educational environments to qualitatively assess pH levels or monitor acid-base titrations in a range of sample types.pH Buffer reference standards are used for the accurate calibration of pH meters and monitors for far more precise and quantitative pH measurement.
pH Test papers are supplied either as rolls, tear-off strips, or sticks. They are impregnated with indicator dyes that change color at a specific pH. In some products, indicator dyes are covalently linked to cellulose fibers to avoid bleed-out (leaching) and contamination of the test sample.
Some pH papers indicate simple acid or base conditions with a single red-to-blue color change (also called litmus papers). Universal pH papers and strips contain a combination of indicators that cover a range of pH values up to and including 0 to 14 in a single test. The observed color change is checked against a comparison chart supplied with the papers.
Alternatively, for metered assessments of pH, standard or reference pH buffers are used to calibrate pH meters and other electrochemical sensors.
Standard Buffer Characteristics:
• Typically supplied at fixed values of pH 4.01, pH 7.00, and pH 10.01
• May be color-coded for easy and quick identification
• Certified to their nominal pH and accuracy at a specified temperature (typically 20°C)
• Supplied as ready-to-use solutions or concentrates
• Contain antifungals for extended shelf life
Med Vet International Comply Sterilization Chemical Indicator Strip Steam 8 inch, 1250, 240/Box
Sterilization chemical indicator strips monitor multiple parameters Perforated in the middle of the strip to allow length to be adapted to pack size Larger portion of indicator ink for a greater area of monitoring in the pack to allow for detection of more sterilization failures
Enterprise Technology Solutions Crucial 1TB P310 PCIe 4.0 x4 M
Crucial 1TB P310 PCIe 4.0 x4 M.2 Internal SSD
Enterprise Technology Solutions WD 4TB Blue SN5000 PCIe 4.0 M.
WD 4TB Blue SN5000 PCIe 4.0 M.2 Internal SSD
Enterprise Technology Solutions Crucial 1TB P310 NVMe PCIe 4.0
Crucial 1TB P310 NVMe PCIe 4.0 M.2 Internal SSD with Heatsink
Med Vet International Curad Medi-Strip Reinforced Wound Closures, 1/2in X 4in, 6/Pack
Adhesive wound closures with an exceptionally porous spun-bond fiber backing, includes bilateral nylon filaments for high tensile strength. Medi-Strips are used in addition to, or in place of, sutures Feature exceptionally porous spunbound fiber backing with reinforced nylon filaments for strength May stay in place for up to 7 days The hypoallergenic adhesive allows for excellent adhesion while still being gentle on skin Each size is supplied in color-coded packaging for quick identification1/2in X 4in6 per pack Comparable to products like ZipStitch instant stitches Available without a prescription Non-Invasive Easy to use Less pain than Stitches and Staples Less Scarring than Stitches Faster than Stitches Avoid cost of Stitches or Staples Rapid and effective wound closure Small and easy to transport Great addition to first aid kits
Sigma Aldrich Fine Chemicals Biosciences ExpandTM Long Range dNTPac
The Expand Long Range dNTPack is the second-generation version of the Expand Long Template PCR System optimized and designed to consistently amplify PCR products from 5kb up to 25kb from genomic DNA (or up to 40kb from lambda DNA templates). The supplied buffer can be used for all PCR product sizes. In addition a buffer without MgCl2 and separate vials of MgCl2 and DMSO are included if optimization is needed. Expand Long Range dNTPack contains a special enzyme mix that consists of thermostable Taq DNA Polymerase and a thermostable DNA polymerase with proofreading activity. This powerful polymerase mixture produces a high yield of PCR product. Due to the inherent 3-5 exonuclease activity of the proofreading polymerase Expand Long Range dNTPack copies DNA three times more accurately than Taq DNA Polymerase.
Sigma Aldrich Fine Chemicals Biosciences Minimum Essential Medium E1L
Minimum Essential Medium (MEM) developed by Harry Eagle is one of the most widely used of all synthetic cell culture media. Early attempts to cultivate normal mammalian fibroblasts and certain subtypes of HeLa cells revealed they had specific nutritional requirements that could not be met by Eagles Basal Medium (BME). Subsequent studies using these and other cells in culture indicated additions to BME could be made to aid growth of a wider variety of fastidious cells.MEM which incorporates these modifications includes higher concentrations of amino acids so the medium more closely approximates the protein composition of cultured mammalian cells. MEM has been used for cultivation of a wide variety of cells grown in monolayers. Optional supplementation of non-essential amino acids to the formulations that incorporate either Hanks or Earles salts has broadened the usefulness of this medium.
Sigma Aldrich Fine Chemicals Biosciences AldrichR Essentials round
Borosilicate glass wide mouth media/reagent bottles with polypropylene GL 45 thread screw cap with pour ring. Large marking spot and reference graduations.
Electron Microscopy Sciences pH Indicator Papers - Test Papers, 7.0 - 14, 100/bx
The indicator dyes of pH-Fix sticks are substantially bound to the cellulose fibers and as a result the possibility of the color bleeding, even in strongly basic solutions, is avoided. The dyes provide a sharp differentiation between the individual pH values and a clear and easy comparison to the color scale. Measurement of pH value is possible even in unbuffered or very weakly buffered solutions, since the sticks can be left in the solution until the final color change is completed. Test samples are not contaminated by the indicator dyes.
Gradations: 0.5
Electron Microscopy Sciences pH Indicator Paper 1.7 - 3.8
The indicator dyes of pH-Fix sticks are substantially bound to the cellulose fibers and as a result the possibility of the color bleeding, even in strongly basic solutions, is avoided. The dyes provide a sharp differentiation between the individual pH values and a clear and easy comparison to the color scale. Measurement of pH value is possible even in unbuffered or very weakly buffered solutions, since the sticks can be left in the solution until the final color change is completed. Test samples are not contaminated by the indicator dyes.
Gradations: 0.3
Electron Microscopy Sciences pH Indicator Paper 0.3 - 2.3
The indicator dyes of pH-Fix sticks are substantially bound to the cellulose fibers and as a result the possibility of the color bleeding, even in strongly basic solutions, is avoided. The dyes provide a sharp differentiation between the individual pH values and a clear and easy comparison to the color scale. Measurement of pH value is possible even in unbuffered or very weakly buffered solutions, since the sticks can be left in the solution until the final color change is completed. Test samples are not contaminated by the indicator dyes.
Gradations: 0.3/0.45