Blood Urea Nitrogen Enzymatic Kit is a microplate-based colorimetric assay for the determination of urea in serum samples produced from blood. Blood urea nitrogen (BUN) is an important marker for normal kidney and liver function. Elevation of BUN levels is often an indication of intestinal and kidney obstruction and cardiac failure. Decreased BUN levels are often associated with kidney and liver damage. BUN is also a very useful tool for preclinical investigation of experimental drug formulations and BUN levels are commonly used to monitor and attenuate the toxic effects of experimental drug formulations in rodents.
Blood Urea Nitrogen Enzymatic Kit uses an enzyme-based assay to determine urea in liquid samples such as serum. The test is based on a highly proven method for urea determination. The Blood Urea Nitrogen Enzymatic Kit contains sufficient materials to test 42 samples in duplicate. The assay utilizes urease, a metabolic enzyme, to specifically detect urea in serum. The Blood Urea Nitrogen Enzymatic Kit provides rapid, accurate, proven results even in complex liquid mixtures. The limit of detection for the test is 8 ppm urea for serum. The linear range of the assay is 8 – 200 ppm analyte.
Aflatoxin is the most common food toxin that is harmful to human and animal health. The most frequent aflatoxins are B1, B2, G1, and G2, which can affect the body through respiratory, mucosal, or cutaneous routes, causing an excessive inflammatory response. Aflatoxin can infect crops during their growing stages or even after they are harvested. It mainly targets the liver and can impair the effectiveness of immunization in children, increasing the risk of infection. Aflatoxin detection and quantification in food and feed is a critical part of food and feed safety concerns.
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Aflatoxin is the most common food toxin that is harmful to human and animal health. The most frequent aflatoxins are B1, B2, G1, and G2, which can affect the body through respiratory, mucosal, or cutaneous routes, causing an excessive inflammatory response. Aflatoxin can infect crops during their growing stages or even after they are harvested. It mainly targets the liver and can impair the effectiveness of immunization in children, increasing the risk of infection. Aflatoxin detection and quantification in food and feed is a critical part of food and feed safety concerns.
NGS FFPE DNA Library Prep Kit (illumina and MGI Platforms)
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The NGS FFPE DNA Library Prep Kit (illumina and MGI Platforms) was developed for the construction of high quality FFPE DNA libraries using 10 ng to 400 ng of input DNA isolated from formalin-fixed, paraffin-embedded (FFPE) samples. The DNA damage caused by fixation makes it difficult to construct high quality libraries. Our kit has been optimized to repair damaged DNA in the reactions. Multiplexing of the NGS FFPE DNA Library is possible.
NGS FFPE DNA Library Prep Kit Workflow
FFPE samples are a great resource for biomedical research. However, the methods for fixation and condition of storage significantly damage the DNA in the samples. Thus, the extraction of high quality DNA from FFPE samples is often a challenge. Low yield and low quality of FFPE DNA usually are common because of the limited tissue material and the DNA degradation.
As a result, it is usually difficult to construct high quality NGS libraries from low amount and low quality of FFPE DNA. In order to address this issue, we have developed the NGS FFPE DNA Library Prep Kit to make high quality libraries from the low input of FFPE DNA samples.
Three index types are available for the NGS FFPE DNA Library Prep Kit of the illumina platform:
Non-index (Cat.# 30035): Libraries do not have index.
Index (Cat.# 30037): Each of our index primers contains a unique barcode DNA (6 bases long) that can be used to identify individual library. Multiplexing of libraries is up to 48 samples. Index information can be downloaded here.
Unique dual index (Cat.# 30039): FFPE DNA library multiplexing is possible with 96 samples based on the unique dual indexing system. Our unique Four–Base Difference Index System allows us to make indexes that have at least 4 bases different from each other in the 8-base index sequence. Our unique dual indexing primers can effectively remove NGS errors including index hopping, de-multiplexing errors, index cross-contamination, mis-assignments etc. The unique dual index primer set includes 96 pre-mixed unique pairs of i5 and i7 index primers. Index information can be downloaded here.
Indexes are available for the MGI platform kits (Cat.# 34037).
Kit advantages:
Fast and simple protocol
Making libraries in just 1.5 hours
10 minutes of hands-on time
Easy procedure
Ready-to-use master mix to reduce the tedious mixing
Less reaction components to simplify the reaction setup
Less magnetic beads needed for the purification steps: saving more than 50% of the expensive beads
Low input FFPE DNA: From 10 ng to 400 ng
Comparison of library conversion efficiency under the same condition. Input DNA amount is 25 ng.
Comparison of library yield under the same condition. Input DNA amount is 25 ng.
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The NGS FFPE DNA Library Prep Kit (illumina and MGI Platforms) was developed for the construction of high quality FFPE DNA libraries using 10 ng to 400 ng of input DNA isolated from formalin-fixed, paraffin-embedded (FFPE) samples. The DNA damage caused by fixation makes it difficult to construct high quality libraries. Our kit has been optimized to repair damaged DNA in the reactions. Multiplexing of the NGS FFPE DNA Library is possible.
Listeria monocytogenes Quantified Bacterial DNA Standard
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Quantified standard to be used as a positive control or PCR quantification standard
Vigorously quantified using multiple methods
Listeria monocytogenes has emerged as a significant foodborne pathogen that poses a serious public health problem. As the causative agent of Listeriosis, L. monocytogenes has the highest rate of fatality among all foodborne pathogens. L. monocytogenes is a facultatively intracellular, Gram-positive bacterium. Due to its ability to survive high and low temperatures as well as low pH, it could resist various food processing technologies, as well as grow at food storage temperatures. L. monocytogenes is known to be associated with raw meat, unpasteurized milk and dairy products, vegetables, and seafood. As little as 1000 organisms may cause the disease with pregnant, new-born, and immunocompromised individuals being the most susceptible.
Norgen’s Listeria monocytogenes Quantified Bacterial DNA Standard is prepared from cultured bacteria using Norgen’s sample preparation technology. The purified DNA is quantified vigorously using multiple methods including spectrophotometry, gel densitometry and real-time PCR. It is intended to be used as a positive control or PCR quantification standard for Listeria monocytogenes.
Upon receipt, store Norgen’s Listeria monocytogenes Quantified Bacterial DNA Standard at -20oC or lower. Avoid multiple freeze-thaw cycle. If needed, prepare smaller working aliquots and store at -20oC or lower.
