4x1x50ml Swing Buckets Rotor 

DBCO-PEG4-acid is an analog of DBCO-Acid with PEG linker and a DBCO group. The DBCO groups is commonly used for copper-free Click Chemistry reactions due to its strain promoted high energy. The hydrophilic PEG chain allows for increased water solubility. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

DBCO-PEG4-acid is an analog of DBCO-Acid with PEG linker and a DBCO group. The DBCO groups is commonly used for copper-free Click Chemistry reactions due to its strain promoted high energy. The hydrophilic PEG chain allows for increased water solubility. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

*Optical system: equipped with infinity plan achromatic stress-free metallographic objective lens,built-in polarizing ober-vation device

*Observation head device:The lens barrel can be rotated 360 degrees,and the interpupillary distance adjustment range is 50-75MM

*Eyepiece configuration:random eyepiece WF10X /22mm;

*Objective:Infinity  plan  achromatic  strain-free   metallographic  objective;5X,10X,20X,50X

*Loading  platform:Stage:Tripod  XY  composite   mechanical  moving  stage; size 140X120MM, stroke 80X50MM, minimum reading value 0.1mm

Specification configuration	XTL-20A	Trinocular observation head,transmission single light source 5W LED ighting
	XTL-20B	Trinocular observation head,transparent reflection double light source up and down 5W LED lighting
Eyepiece	Wide-angle eyepiece WF10Xfield of view 22mm,optional WF16X,WF25X
Converter	Quadruple Revolving converter
Objective	Infinite field achromatic stress-free objective,5X,10X,20X,50X
Condenser	N.A.1.25 Swinging Abbe condenser with variable light bar
Stage	Double Layer Mechanical Stage,Size1140X120mn,Moving Range :80x50mm
Focusing	Coaxial Coase &Fine adjustment,fine division 0.02mm
Light source	LED 5V lighting,DC1272A power adapter,adjustable brightness
Attachments	Dust bag,Type C power cord

XTL-20 series metallographic microscopes are equipped with infinity plan achromatic stress-free metallographic objective lens and Wide-angle eyepiece, with the characteristics of beautiful appearance, clear imaging, broad vision, convenient operation and so on, etc. It can be widely used in biology, medicine, industry, agriculture and other fields, and is an ideal instrument for medical, teaching, scientific research and other units
Model:
XTL-20

Brand:
Yingtai

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.
 

Details

Supporting Data

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Volume Provided	250 μL
DNA Quantity	2 x 104 copies per μL

Storage Conditions

Upon receipt, store Norgen’s Listeria monocytogenes Quantified Bacterial DNA Standard at -20^oC or lower. Avoid multiple freeze-thaw cycle. If needed, prepare smaller working aliquots and store at -20^oC or lower.