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Başlama Tarihi: 10/09/2008 14:36
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Bilgi Bankası - Mikrobiyoloji, Sitoloji, Genetik, Zooloji, Botanik

Mikrobiyoloji - Sitoloji - Genetik - Zooloji - Botanik Bilgi Bankası

>A - B - C- Ç - D - E - F - G - H - I - İ - J - K - L - M - N - O - Ö - P - R - S - Ş - T - U - Ü - V - W - X - Y - Z<

Koloni Variasyonları
Koloni Variasyonları

Eskimiş sıvı kültürlerinden, durma veya ölme döneminde olanlardan, katı besiyerlerine ekim yapılırsa başlıca iki tür koloni tipine rastlanır. Bunlar S-tipi ve R-tipi kolonilerdir.

S-tipi: Yuvarlak, düzgün, parlak, pürüzsüz ve konveks
R-tipi: Pürüzlü, mat ve düzensiz

Bu koloniler dışında başta tip kolonilerin oluşmasıda muhtemeldir (intermedier koloniler ve mukoid-M).

Çok faza pasaj yapılmış veya eskimiş kültürlerde R-tipi koloni variasyonlarına rastlamak genellikle mümkündür. S-tipi -> R-tipi variasyonları için ortama Lityum Klorid (Lithium chloride) veya anti-S immunserum katılması yeterlidir. Fakat R-tipi -> S-tipi variasyonları bu kadar kolay değildir. Bu variasyonu sağlamak için, duyarlı laboratuvar hayvanlarında pasaj yapılması gereklidir. S-tipi -> R-tipi variasyonlarında bazı değişlikler olur.

S-tiplerR-tipler
1- Patojeniktir
1- Patojenesi azalmış veya tamamen kaybolmuştur
2- Genellikle kapsüllüdürler
2- Kapsüllü değildirler
3- Koloniler düzgün, yuvarlarlak,parlak ve konvekstir
3- Koloniler pürüzlü, mat ve düzensizdir
4- Sıvı ortamlarda homojen ürerler
4- Sıvı besiyerlerinde granüllü ürerler ve dipte tortu yaparlar
5- Fizyolojik su ile homojen bir süspansiyon oluştururlar
5- Fizyolojik su ile granüler bir süspansiyon oluştururlar

Mikroorganizmalar, penisilin veya diğer baskılayıcı kimyasallar ile katı besiyeri ortamında üretilirse, normalinden çok fazla değişikliğe sahip L-formlu koloni oluşutur (Ortası papillalı koloniler). Bu baskılar eğer mikropların üzerinden kaldırılırsa, bu mikroorganizmalar normal koloni ve bireysel formlarına geri dönerler.
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10/09/2010 09:59
Yusuf,eskidin artık kardaşım.Başka Ahmetler,Veliler,H
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10/09/2010 09:50
Artık yabancı büyük üniversiteler bilimde mikro boyuttan,makro boyuta dönüyormuş.Doğru mu Yusuf?Hatta bunun için dünya genelinde projeler yürütüyorlarmış.Do
ğru yani.

07/09/2010 12:25
site çok güzel de ''YUSUF'' adlı kullanıcıdan başka keşke ilgilenen olsa ben açıkçası böyle bir siteye üye olduğumu bile unutmuştum

01/09/2010 20:26
yazmasnı bilmiyorum ki admin öğretmedi Smile

01/09/2010 11:01
Irmak da forumlara yazı yazsa olmaz mı?

11/08/2010 12:24
adminin bu site için çalıştığını düşünmüyorum zaten..referanduma
az kaldı daha önemli onun için Smilesiyaset daha önemli nedense Pfft

10/08/2010 14:55
ben siteye uğruyorum admin bey Pfft

26/03/2010 12:52
bir senedir aynı haberler...bir site yapıyorsunuz adam gibi ilgilenin bari

16/01/2010 19:43
yusuf uctun yıne dostum ne dıyosun yaaaa

12/01/2010 22:30
ya neden kımse ılgılenmıyo sorularımla.Anlıyo
rum finallerınız basladı ama Yusuf barı sen cevapla.

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