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1) គោលបំណងនៃថ្នា ល
2)គោលការណ៍នៃគេស្ដ
3)ស្មាស្ធាេុផ្សំ ៃិងមុខងារ
4)ៃិេិវ ិធីនៃការផ្លិេថ្នា លបណ្ ដ ុះ
5)ការត្េួេពិៃិេយគុណភាព
6)ការពិៃិេយលទ្ធផ្ល ៃិងបកត្ាយលទ្ធផ្ល
 ថ្នា លបណ្ដ ុះ Urea គឺជាថ្នា លមួយប្បភេទដែលស្ថិតក្ាដងប្បភេទថ្នា ល Identification Media។
 ថ្នា លបណ្ដ ុះ Urea មានពីរប្បភេទគឺ ថ្នា លបណ្ដ ុះរឺង (Urea Agar) នឹងថ្នា លបណ្ដ ុះរាវ (Urea Broth)។
Urea agar or Urea broth គឺប្តូវបានភគភប្បើភែើមបីដបងដែក្ និងបញ្ចា ក្់អតតស្ញ្ចា ណរបស្់បាក្់ភតរីដែលស្ថិតក្ាដងប្ក្ដមប្គួសារ
Enterbacteria ដែលមានស្មតថភាពក្ាដងការបំដបក្ Urea។ ភ ើយថ្នា លភនុះប្តូវបានភគភប្បើភែើមបី Detect រក្នូវវតតមាន ននអង់ស្ីម Urease
ដែលនឹងបភចាញភោយបាក្់ភតរី។
 Urea គឺជាសារធាតគីមីដែលមានបង្ដំនាទី Carbonic acid។
 Urease គឺជាអង់ស្ីមដែលបំដបក្ Urea។
Urease នឹងភ្វើការបំដបក្ភលើ Urea (Hydrolyzes) រូែបភងកើតបានជា Ammonia and
Carbondioxide។ ភៅភពលដែល Urea ប្តូវបានបំដបក្វតតមាននន Ammonia នឹងភ្វើភោយថ្នា លទំងមូលមានការដប្បប្បួលភលើក្ប្មិត PH
(ភោយភ្វើភោយថ្នា លមាន PH ជា Alkaline)។ ការដប្បប្បួលននក្ប្មិត PH នឹងប្តូវបានបង្ហា ញ តាមរយៈការប្ូរពណ៌ននថ្នា ល ភោយសារ Indicator
ដែលមានភៅក្ាដង ថ្នា ល។ ការផ្លា ស្់ប្ូរពណ៌ភោយប្ូរពី ពណ៌ទឹក្ប្ក្ូែ (Orange) ភៅពណ៌ប្ក្ ម ឬផ្លក ឈូក្ (Red or Pink)។
 Urea ជាស្មាស្ធាតភែើមដែលភប្បើភែើមបីរក្ Enzyme Urease
 Sodium Chloride ភប្បើភែើមបីរក្ាលំនឹងស្មាា ្អូស្មូទិែក្ាដងថ្នា ល
 Peptone ជាប្បេពដែលផ្្ល់នូវោហារបំប៉ន ែូែជា amino acid, nitrogen, nucleic acid, minerals
and vitamins
 Dextrose (Glucose) ជាប្បេពដែលផ្្ល់នូវថ្នមពល
 Phenol Red ជាសារធាតែងអដលពណ៌ (PH Indicator)
 Agar ជាសារធាតដែលភ្វើភោយថ្នា លរឹង
 Monopotassium phosphate ជួយក្ាដងការរក្ាលំនឹង PH
 Disodium phosphate ជួយរក្ាលំនឹង PH and Osmosis
 Yeast Extract ជាប្បេពននោហារបំប៉ន
 Distilled Water ជាទឹក្បិតដែលភប្បើក្ាដងការផ្លិតថ្នា ល
1. To prepare Urea Agar medium, add 1.7 g of granulated agar to 100 mL of purified
water. Heat with agitation and boil for 1 min.
2. Dispense in 9 mL aliquots into tubes and sterilize by autoclaving at 121 °C for 15
min.
3. Cool the agar to 45–50 °C, and allow one tube of concentrate to come to room
temperature. Add 1 mL of concentrate to each 9 mL of cooled agar solution and mix
thoroughly.
4. Allow the tubes to cool in a slanted position so that slants with deep butts are
formed.
Test Organisms
Inoculat
ion
Method*
Incubation
Results
Time
Temperat
ure
Atmosph
ere
Proteus mirabilis
ATCC ® 12453 E 18-24hr 35°C Aerobic
Positive: growth;
pink color change
Escherichia coli
ATCC ® 25922 E 18-24hr 35°C Aerobic
Negative: growth;
yellow color
change
 www.google.com
 www.microbeonline.com
 www.slideshare.net
 www.oxoid.com
 www.bd.com
 BD
Urea media

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Urea media

  • 1.
  • 2.
  • 3. 1) គោលបំណងនៃថ្នា ល 2)គោលការណ៍នៃគេស្ដ 3)ស្មាស្ធាេុផ្សំ ៃិងមុខងារ 4)ៃិេិវ ិធីនៃការផ្លិេថ្នា លបណ្ ដ ុះ 5)ការត្េួេពិៃិេយគុណភាព 6)ការពិៃិេយលទ្ធផ្ល ៃិងបកត្ាយលទ្ធផ្ល
  • 4.  ថ្នា លបណ្ដ ុះ Urea គឺជាថ្នា លមួយប្បភេទដែលស្ថិតក្ាដងប្បភេទថ្នា ល Identification Media។  ថ្នា លបណ្ដ ុះ Urea មានពីរប្បភេទគឺ ថ្នា លបណ្ដ ុះរឺង (Urea Agar) នឹងថ្នា លបណ្ដ ុះរាវ (Urea Broth)។
  • 5. Urea agar or Urea broth គឺប្តូវបានភគភប្បើភែើមបីដបងដែក្ និងបញ្ចា ក្់អតតស្ញ្ចា ណរបស្់បាក្់ភតរីដែលស្ថិតក្ាដងប្ក្ដមប្គួសារ Enterbacteria ដែលមានស្មតថភាពក្ាដងការបំដបក្ Urea។ ភ ើយថ្នា លភនុះប្តូវបានភគភប្បើភែើមបី Detect រក្នូវវតតមាន ននអង់ស្ីម Urease ដែលនឹងបភចាញភោយបាក្់ភតរី។
  • 6.  Urea គឺជាសារធាតគីមីដែលមានបង្ដំនាទី Carbonic acid។  Urease គឺជាអង់ស្ីមដែលបំដបក្ Urea។ Urease នឹងភ្វើការបំដបក្ភលើ Urea (Hydrolyzes) រូែបភងកើតបានជា Ammonia and Carbondioxide។ ភៅភពលដែល Urea ប្តូវបានបំដបក្វតតមាននន Ammonia នឹងភ្វើភោយថ្នា លទំងមូលមានការដប្បប្បួលភលើក្ប្មិត PH (ភោយភ្វើភោយថ្នា លមាន PH ជា Alkaline)។ ការដប្បប្បួលននក្ប្មិត PH នឹងប្តូវបានបង្ហា ញ តាមរយៈការប្ូរពណ៌ននថ្នា ល ភោយសារ Indicator ដែលមានភៅក្ាដង ថ្នា ល។ ការផ្លា ស្់ប្ូរពណ៌ភោយប្ូរពី ពណ៌ទឹក្ប្ក្ូែ (Orange) ភៅពណ៌ប្ក្ ម ឬផ្លក ឈូក្ (Red or Pink)។
  • 7.
  • 8.  Urea ជាស្មាស្ធាតភែើមដែលភប្បើភែើមបីរក្ Enzyme Urease  Sodium Chloride ភប្បើភែើមបីរក្ាលំនឹងស្មាា ្អូស្មូទិែក្ាដងថ្នា ល  Peptone ជាប្បេពដែលផ្្ល់នូវោហារបំប៉ន ែូែជា amino acid, nitrogen, nucleic acid, minerals and vitamins  Dextrose (Glucose) ជាប្បេពដែលផ្្ល់នូវថ្នមពល  Phenol Red ជាសារធាតែងអដលពណ៌ (PH Indicator)  Agar ជាសារធាតដែលភ្វើភោយថ្នា លរឹង  Monopotassium phosphate ជួយក្ាដងការរក្ាលំនឹង PH  Disodium phosphate ជួយរក្ាលំនឹង PH and Osmosis  Yeast Extract ជាប្បេពននោហារបំប៉ន  Distilled Water ជាទឹក្បិតដែលភប្បើក្ាដងការផ្លិតថ្នា ល
  • 9. 1. To prepare Urea Agar medium, add 1.7 g of granulated agar to 100 mL of purified water. Heat with agitation and boil for 1 min. 2. Dispense in 9 mL aliquots into tubes and sterilize by autoclaving at 121 °C for 15 min. 3. Cool the agar to 45–50 °C, and allow one tube of concentrate to come to room temperature. Add 1 mL of concentrate to each 9 mL of cooled agar solution and mix thoroughly. 4. Allow the tubes to cool in a slanted position so that slants with deep butts are formed.
  • 10. Test Organisms Inoculat ion Method* Incubation Results Time Temperat ure Atmosph ere Proteus mirabilis ATCC ® 12453 E 18-24hr 35°C Aerobic Positive: growth; pink color change Escherichia coli ATCC ® 25922 E 18-24hr 35°C Aerobic Negative: growth; yellow color change
  • 11.
  • 12.  www.google.com  www.microbeonline.com  www.slideshare.net  www.oxoid.com  www.bd.com  BD