Propargyl-PEG4-(CH2)3-CO2H is a linker containing a propargyl group at one end and a carboxylic acid at the other end. The carboxylic acid reacts with amine groups in the presence of activators (EDC or HATU). Under the catalyzation of copper, the propargyl group forms linkage with azide group of biomolecules. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Detail
Propargyl-PEG4-(CH2)3-CO2H is a linker containing a propargyl group at one end and a carboxylic acid at the other end. The carboxylic acid reacts with amine groups in the presence of activators (EDC or HATU). Under the catalyzation of copper, the propargyl group forms linkage with azide group of biomolecules. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Other Products
Ammonia Assay Kit (Liquid Ready™)
Product Info
Document
Product Info
K-AMIARLQ
SKU: 700007403
50 assays (manual) / 500 assays (auto-analyzer)
Content:
50 assays (manual) / 500 assays (auto-analyzer)
Shipping Temperature:
Ambient
Storage Temperature:
Short term stability: 2-8oC, Long term stability: See individual component labels
Analyte:
Ammonia, Nitrogen, YAN
Assay Format:
Spectrophotometer, Auto-analyzer
Detection Method:
Absorbance
Wavelength (nm):
340
Signal Response:
Decrease
Linear Range:
0.4 to 8 µg of ammonia per assay
Limit of Detection:
1 mg/L
Limit of Quantification:
3 mg/L
Reproducibility (%):
< 5%
Reaction Time (min):
~ 5 min
The Ammonia (Liquid Ready™) assay kit is a rapid (~ 5 min), method for the specific measurement and analysis of ammonia in wine, beverages, foodstuffs and other materials. Supplied as a 2-reagent format “ready to use” liquid stable formulation that is suitable for manual and auto-analyzer formats with a simple, reliable and accurate method.
“Ready to use” liquid stable formulation – no reconstitution needed
Rapid reaction (~ 5 min)
PVP incorporated to prevent tannin inhibition
Standard included
Suitable for manual and auto-analyzer formats
Quick Reference Guide available
Mega-Calc™ software tool is available for hassle-free raw data processing
Document
The Ammonia (Liquid Ready™) assay kit is a rapid (~ 5 min), method for the specific measurement and analysis of ammonia in wine, beverages, foodstuffs and other materials. Supplied as a 2-reagent format “ready to use” liquid stable formulation that is suitable for manual and auto-analyzer formats with a simple, reliable and accurate method.
Listeria monocytogenes Quantified Bacterial DNA Standard
Product Info
Document
Product Info
Overview
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.
Campylobacter jejuni is a curved, rod-shaped and microaerophillic gram negative bacterium. It is one of the most common causal agents of gastroenteritis with diarrhea as the main symptom. While infection of C. jejuni is seldom life-threatening, it is considered one of the most common food-borne bacteria with over 2 million people infected per year in US alone. Infection of C. jejuni usually results from consumption of poorly prepared food including undercooked meat (particularly poultry), untreated water or raw unpasteurized milk. Traditional identification of C. jejuni involves culturing, however the microaerophilic characteristic of this bacterium make the enrichment process laborious and costly.
Storage Conditions and Product Stability All kit components can be stored for 2 years after the date of production without showing any reduction in performance.
All kit components should be stored at -20°C upon arrival. Repeated thawing and freezing (> 2 x) of the Master Mix and Positive Control should be avoided, as this may affect the performance of the assay. If the reagents are to be used only intermittently, they should be frozen in aliquots.