Propargyl-PEG3-NHS ester is a Click Chemistry reagent with a propargyl group and an NHS ester group. The propargyl group can react with biomolecules containing azide group via copper catalyzed Click Chemistry reaction. The NHS ester is an amine reactive group which can be used for derivatizing peptides, antibodies, amine coated surfaces etc. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Propargyl-PEG3-NHS ester is a Click Chemistry reagent with a propargyl group and an NHS ester group. The propargyl group can react with biomolecules containing azide group via copper catalyzed Click Chemistry reaction. The NHS ester is an amine reactive group which can be used for derivatizing peptides, antibodies, amine coated surfaces etc. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
E. coli O157:H7 is a rod-shaped, gram negative bacterium. It is an enterohemorrhagic strain of the common E. coli bacterium and infection by the O157:H7 strain is commonly associated with hemorrhagic colitis. E. coli O157:H7 is recognized by its somatic (cell wall) antigen (O157) and its flagella antigen (H7). In addition, E. coli O157:H7 is known to produce Shiga-like toxins, which cause severe symptoms. While most patients can recover from the infection, up to 15% of the patients may develop hemolytic uremic syndrome, a type of kidney failure that could be fatal. Infection of E. coli O157:H7 usually results from consumption of poorly prepared food including undercooked meat (particularly ground beef), untreated water or raw unpasteurized milk.
Norgen’s E. coli O157:H7 Quantified Bacterial DNA Standards are cloned fragments of the two Shiga-like toxin regions purified using Norgen’s sample preparation technology. They include partial sequences of STX-1 subunit A gene and STX-2 subunit A gene. Please refer to Appendix A for sequence information. The purified DNA is quantified vigorously using multiple methods including spectrophotometry, gel densitometry and real-time PCR. It is intended to be used as positive controls or PCR quantification standards for E. coli O157:H7. This product is compatible with Norgen Biotek’s E. coli O157:H7 Taqman PCR Detection Kit (Cat. TM41350) and E. coli O157:H7 Taqman PCR Detection Probe/Primer and Control Set (Cat. TM41310).
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| Volume Provided | 250 μL (for STX1)250 μL (for STX2) |
| DNA Quantity | 2 x 104 copies per μL |
Storage Conditions
Upon receipt, store Norgen’s E. coli O157:H7 Quantified Bacterial DNA Standards at -20°C or lower. Avoid multiple freeze-thaw cycles. If needed, prepare smaller working aliquots and store at -20°C or lower.
Features:
1. Programmable microprocessor control system, touch screen indicates rotor No., speed, time, temperature, RCF, rate of speed as well as fault information.
2. Adopts band heater, fast heating speed, temperature uniform, with the function of temperature-control and constant.
3. Centrifugal tube made in special skill, anti-broken when work.
4. Great toque brushless motor, maintenance-free, no powder, fast acceleration and deceleration, low noise, which improve the stability a lot.
5. Electric lid lock, over-speed and over-temperature protection
6.3 phase to keep the best performance.
7. Stainless steel chamber, safe and reliable
TD5B Technical Parameter：
| Max. Speed | 4000rpm |
| Max. RCF | 2498×g |
| Max. Capacity | 4×100ml |
| Time Range | 0~99min |
| Rotor | Swing Out Rotor |
| Noise (dB) | ≤ 58 |
| Temperature | Room temperature:+10~80℃ |
| Acc/Dcc | 10 Kinds |
| Speed Accuracy | ±20r/min |
| Temperature Accuracy | ±1℃ |
| Oil tube size | 37×200mm |
| Size (W x D x Hmm) | 685×500×385mm |
| Net Weight(Kg) | 67KG |
Oil test centrifuge， Heating oil test centrifuge, special tube oil test centrifuge
