Propargyl-PEG6-t-butyl ester is a heterobifunctional linker consisting of an alkyne group and a t-butyl protected carboxyl group. The alkyne group can participate in copper catalyzed azide-alkyne Click Chemistry to form a stable triazole linkage. The t-butyl group can be hydrolyzed under acidic conditions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Propargyl-PEG6-t-butyl ester is a heterobifunctional linker consisting of an alkyne group and a t-butyl protected carboxyl group. The alkyne group can participate in copper catalyzed azide-alkyne Click Chemistry to form a stable triazole linkage. The t-butyl group can be hydrolyzed under acidic conditions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
DBCO-PEG2-DBCO is a PEG linker containing two terminal DBCO groups. 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. T Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
DBCO-PEG2-DBCO is a PEG linker containing two terminal DBCO groups. 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. T Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Usages：
For determination of coliform confirmatory test for multi-tube fermentation.
Principle:
Peptone provide carbon and nitrogen sources; lactose as fermentable sugars; ox bile powder and brilliant green inhibit the non-Enterobacteriaceae.
Formulation (per liter):
Peptone: 10g
Lactose: 10g
Ox bile powder: 20g
Brilliant green: 0.0133g
Final pH7.2 ± 0.2
How to use:
1.Suspend 40g of the product, add 1 L of distilled water, stirring heated to boiling until completely dissolved, packed in a test tube with a small inverted tube, autoclave at 121 ℃ for 15min, cool to room temperature and set aside.
2.Sample handling and dilution. Slightly.
3.Transplanted LST broth tube to brilliant green lactose bile broth tube by using a inoculating loop.
4.the tube was placed in an incubator culture at 36 ± 1 ℃ for 24h.
5.Observe the results. Press production trachea number, check table report MPN MPN value per gram (mL) sample of coliform bacteria.
Quality control:
Quality control strains were inoculated and culuture at 36 ± 1 ℃ for 24h ,results are as follows:
Bacterial Name Bacterial No. Growth Status Gassing
Escherichia coli ATCC25922 good +
Salmonella typhimurium CMCC (B) 50115 good —
Staphylococcus aureus ATCC6538 inhibited —
Storage: Store in a dark, cool and dry place, tighten the cap immediately after use. Storage period of three years.
Specifications: 250g/bottle
250g
TD4N Table Top 5000rpm Low Speed Laboratory Centrifuge
TD4N Features:
1. Microprocessor control, less noisily, it is widely used to qualitative analysis of blood serum, plasma and urea in the fields of hospital, blood center, laboratory and biochemistry.
2. Brushelss motor, free maintenance, no powder pollution, quick in speed up and down.
3. The flexible axle driven system which drive the rotor directly, smooth in operation and small vibration.
4. There are many rotors for your choice, suitable for different specifications meet customers’ different requirements of separation.
5. Micro-computer control system, digital display the RCF, time and speed.
6. Electric lid lock, compact design, super speed and imbalance protection.
TD4N Technical Parameter:
| Max. Speed | 5000rpm | Speed Accuracy | ±20rpm |
| Max. Volume | 6x100ml | Power Supply | AC110V/220V 50HZ/60HZ |
| Max. RCF | 3460xg | Noise | ≤55dBA |
| Timer | 0~99min | Net Weight | 18Kg |
| Dimension | 540x370x280mm | Certifications | CE, ISO & Calibration report are available. |
| Warranty | 1 Year |
Matched Rotors for TD4N:
| Order No. | Rotor Type | Max.Speed(rpm) | Max.Volume(ml) | Max.RCF(xg) |
| 4N-1 | Swing Rotor | 5000 | 6x10ml | 3460 |
| 4N-2 | Angle Rotor | 4000 | 30×7/5ml | 2250 |
| 4N-3 | Angle Rotor | 4000 | 18×15/10ml | 2250 |
| 4N-4 | Angle Rotor | 4000 | 24x10ml | 2200 |
| 4N-5 | Angle Rotor | 4000 | 12×15/7/5ml | 2150 |
| 4N-6 | Angle Rotor | 4000 | 12x20ml | 2200 |
| 4N-7 | Angle Rotor | 5000 | 6x15ml | 2540 |
| 4N-8 | Angle Rotor | 5000 | 12x15ml | 3080 |
| 4N-9 | Angle Rotor | 5000 | 4x50ml | 2520 |
| 4N-10 | Angle Rotor | 5000 | 6x50ml | 2850 |
| 4N-11 | Angle Rotor | 5000 | 4x100ml | 2630 |
| 4N-12 | Angle Rotor | 5000 | 6x100ml | 3130 |
TD4N is a table top centrifuge widely used to qualitative analysis of blood serum, plasma and urea in the fields of hospital, blood center, laboratory and biochemistry.
