Bacteriostatic Water/BAC Water

Customized Logo/No Logo

Langfang Jiwei Medical Technology Co., Ltd. is located in Guangyang District of Langfang City, next to Beijing, the capital of China,a company specializing in high-tech biomedicine. At present, it is mainly engaged in the research and development, production, sales and technical support of polypeptide products.
We always adhere to the market demand oriented, and constantly develop more effective high-tech products, our product market has been all over the world, mainly exported to the United States, Europe, South Africa, Asia Pacific and other countries and regions, has rich market experience, but also will provide you with the perfect price service.
We also have a perfect logistics mechanism, as long as you are in a certain corner of the earth, we will do our best to deliver products to your home.
We also provide samples as a trial order for you to test, because of the good quality of the products, so highly valued by foreign customers. The product clearance rate is 100%, please wait patiently for 2-3 days after placing the order, we will deliver to your door.

Certification

Langfang Jiwei acquired early mastery of development and manufacturing of peptides, the short chain amino acids linked by peptide bonds that have enabled new generations of small molecule drugs that closely mimic the body's natural pathways.
Now Langfang Jiwei possesses first-class capabilities to manufacture peptides at industrial scale and in full compliance with the strictest Good Manufacturing Practice (cGMP) standards.

Main Products

Our main products are polypeptide products, synthetic polypeptide amino acids, beauty hypoglycemic products, sterile water, pharmaceutical raw materials and fine chemical products. With strong research and development capabilities, superb synthesis technology, perfect after-sales support, and effectively promote the cooperation between major foreign enterprises, institutions, and theaters, we always adhere to the concept of customer is God, adhering to the attitude of lifelong responsibility for customers to do products. Hope customers not only outstanding beauty, but also beautiful health.
We always adhere to the market demand oriented, and constantly develop more effective high-tech products, our product market has been all over the world, mainly exported to the United States, Europe, South Africa, Asia Pacific and other countries and regions, has rich market experience, but also will provide you with the perfect price service.
We also have a perfect logistics mechanism, as long as you are in a certain corner of the earth, we will do our best to deliver products to your home.
We also provide samples as a trial order for you to test, because of the good quality of the products, so highly valued by foreign customers. The product clearance rate is 100%, please wait patiently for 2-3 days after placing the order, we will deliver to your door.

1.Can you send samples?
 Of course,we can provide free samples, the shipping costs should be paid by our customers.

2.Can you offer OEM products?
 Yes, OEM service is provided, we can make products according to your requirements. MOQ may be required.

3.How about the delivery time?
 For stock available products, immediate delivery upon payment confirmation.
 For non-stock products, lead-time is 14-21 days upon payment or deposit confirmation. Specific delivery time   depends on the items and the quantity of your order.

4. Are you a factory?
 Yes, we are not only the factory but also we have our own design team to make the perfect and professional   design with your own particular logo, concepts and special requirements.

5.How is your MOQ?
 Generally MOQ for product is 1 full case. For custom products or custom packaging, typically the MOQ is 50 full   cases.

6.When can I get the quotation?
 We usually quote you within 24 hours after we get your inquiry.
 If your need for a quotation is very urgent, please call us or tell us in your mail so that we can prioritize your   quotation.

7.What are your payment terms?
 TT, 100% L/C ,Western Union, Paypal or Others.

8.How should peptides be properly stored?
• Store the peptide in a cold, dry, dark place
• Avoid repeated freezing and thawing of peptide
• Avoid overexposure to the air
• Avoid light exposure
• Avoid storing peptides in solution long-term
• Aliquot peptide according to experimental requirements
 

Others You Wronde

1.Best Practices For Storing Peptides

To preserve the integrity of laboratory results, proper storage of peptides is essential. Correct storage practices can maintain peptides for years and guard against contamination, oxidation, and degradation that may render your peptides, and therefore experiments, useless. While some peptides are more susceptible to degradation than others, knowing and implementing the best practices for peptide storage can greatly lengthen their stability and integrity regardless of composition.

Once peptides have been received, it is imperative that they are kept cold and away from light. If the peptides will be used immediately, or in the next several days, weeks or months, short-term refrigeration under 4C (39F) is generally acceptable. Lyophilized peptides are usually stable at room temperatures for several weeks or more, so if they will be utilized within weeks or months such storage is typically adequate.

''However, for longer-term storage (several months to years) it is more preferable to store peptides in a freezer at -80C (-112F). When storing peptides for months or even years, freezing is optimal in order to preserve the peptide's stability.
Additionally, it is important to avoid repeated freeze-thaw cycles. This can increase the peptide's susceptibility to degradation. Also, frost-free freezers should be avoided to store peptides, as temperatures can fluctuate widely during defrosting cycles.

2.Preventing Oxidation and Moisture Contamination
 

It is imperative to avoid contaminating peptides with both air and moisture. Moisture contamination is especially prone to occur when using a peptide immediately after withdrawing it from the freezer. To prevent uptake of moisture from the air on the cold surface of the peptide or on the inside of its container, allow the peptide to come to room temperature before opening.

It is also crucially important to minimize a peptide's exposure to the air. A peptide's container should therefore be kept closed as much as possible. After the required amount of peptide has been removed, resealing the container under an atmosphere of dry, inert gas (such as nitrogen) will minimize the potential for the remaining peptide to become oxidized. Peptides with sequences C (cysteine), M (methionine), and W (tryptophan) are especially prone to air oxidation.

Because frequent thawing and refreezing as well as exposure to air can greatly reduce a peptide's long-term stability, many researchers prefer to determine each experiment's required amount of peptide and then aliquot this amount into separate vials as necessary. This is a highly useful preventative measure against peptide degradation.

 

3.Storing Peptides In Solution

The shelf life of peptide solutions is far less than that of lyophilized peptides, and peptides stored in solution are also vulnerable to bacterial degradation. Peptides containing Cys, Met, Trp, Asp, Gln, and N-terminal Glu in their sequences have especially short shelf lives when in solution.

Nevertheless, if peptides absolutely must be stored in solution, sterile buffers at pH 5-6 should be used, and the peptide solution should be separated into aliquots to avoid repeated freezing and thawing. Peptide solutions are generally stable for up to 30 days when refrigerated at 4C (39F), but those peptides with inherent instability should be kept frozen when not in use.

 

4.Peptide Storage Containers

Containers for peptide storage should be completely clean, clear, and structurally sound. They should also be chemically resistant and appropriately sized for the amount of peptide in them. Both glass and plastic vials are commonly used; plastic vials vary between those composed of polystyrene and those made of polypropylene. Polystyrene vials are generally clear but not chemically resistant; however, polypropylene vials are generally translucent but chemically resistant.

While high quality glass vials offer all of the desirable characteristics for a peptide storage container, peptides are sometimes shipped in plastic vials in order to guard against breakage. Still, peptides can always be transferred from a plastic container to a glass container or vice versa, if necessary.