寒天培地
Your Premier Bacteriological Agar Supplier
はじめに
Agar is a natural hydrocolloid extracted from several species of red algae, mainly the Gelidium, Gracilaria, and Pterocladia types.
Agar was first suggested for microbiological purposes in 1881 by Fannie Hesse. By the early 1900s, agar became the gelling agent of choice over gelatin because agar remains firm at growth temperature for many pathogens and agar is generally resistant to a breakdown by bacterial enzymes. The use of bacteriological agar in microbiological media significantly contributed to the advance of microbiology, paving the way to study pure cultures.
Our agar is made from selected gelidium and gracilaria, and used as coagulants in the microbial medium.
Bacteriological Agar Properties
- Agar is a gel at room temperature, remaining firm at temperatures as high as 65°C
- Agar melts at approximately 85 - 91°C, a different temperature from solidification at 34 - 36°C. This property is known as hysteresis.
- Agar is generally resistant to shear forces;
メリット
- The main advantage of this agar is the absence of inhibitors, which could interfere in the microorganisms growth.
- It has excellent transparency, high hysteresis and very reliable reproducibility.
- Each batch produced is thoroughly tested for biological performance against a battery of known bacterial cultures in order to ensure proper growth characteristics and absence of inhibitors.
- Bacteriological Agar type gives a higher gel strength than the normal version. It is used in concentrations from 1.2% to 1.6%.
It includes good clarity, controlled gelation temperature, controlled melting temperature, good diffusion characteristics, absence of toxic bacterial inhibitors, and the relative absence of metabolically useful minerals and compounds.
It is recommended for clinical applications, auxotrophic studies, bacterial and yeast transformation studies, and bacterial molecular genetics applications.
Specification
CHEMICAL CHARACTERISTICS | |
Appearance | Off-white to yellowish powder |
Moisture | ≤ 12 ﹪ |
Total Ash | ≤ 5 ﹪ |
Gel-strength (Nikkan Method) | 700-1200 g/cm2 |
pH | 4 - 8 |
Mesh size | 80 - 100 |
Starch & Dextrin | Not detectable |
Gelatin and other proteins | Not detectable |
Water insoluble matter | ≤ 1 ﹪ |
Acid insoluble matter | ≤ 0.5 ﹪ |
Pb | ≤ 5 ppm |
As | ≤ 2 ppm |
Cd | ≤ 1 ppm |
Hg | ≤ 1 ppm |
MICROBIOLOGICAL TEST | |
Total plate count | ≤ 5000 cfu/g |
Yeast & Mold | ≤ 300 cfu/g |
E.Coli | Absent in 5 g |
Salmonella | Absent in 5 g |
Technical Data Sheet
Click the right button to download the full TDS of Agar Agar Powder.
Packaging, Storage and Shelf Life
As a professional and responsible bacteriological agar supplier in China, Gino Biotech provides customized products and flexible packaging solutions. By offering custom packaging, we will help you boost your business and stand out from the competition.
Carton Box
Fiber Drum
Tin Box
Kraft Bag
PP Woven Bag
Store away from heat and moisture, preferably in a cool and dry place. The product, when stored in these conditions and in its original unopened packaging, will maintain its initial properties for 24 months.
アプリケーション
It is recommended for clinical applications, auxotrophic studies, bacterial and yeast transformation studies, and bacterial molecular genetics applications.
This product is a gelling agent used in the preparation of culture media for microbial growth and other bacteriological applications, it is used for different microbiological applications, being the basic ingredient in the preparation of plaque diagnostic culture media.
Culture media and other bacteriological applications, Plant tissue culture, Dental mold, Pharmaceutical preparations.
Suggested Use Level | Guidelines for Use
It is used in culture media in the following concentrations:
- For Routine Media:1.4 % - 1.6 % ,
- For Soft Media: 0.5 %,
- For Semi-solid Media: 0.15 %,
- For Media with Reduced Oxygen Tension: 0.05 % - 0.1 %,
- For Extra Hard Gels, for inhibiting swarming of Proteus species: 2.5 % - 3.0 %
お問い合わせフォーム
Gino Biotech will always be your best supplier and a good partner for agar agar and other hydrocolloids from China.
連絡先 Henan Gino Biotechnology Co., Ltd. for Technical Service or questions involving Agar Agar or ask at [email protected]
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