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Proteus is a genus of bacteria in the family of Enterobacteriaceae. Proteus species are famous for their swarming on solid culture media. When different Proteus species swarm towards each other, a line of inhibited growth results where strains meet. This was first observed in 1946 by Dienes and is referred to as the Dienes phenomenon.
The cause of the formation of a Dienes line is still unknown. For a long time, scientists though that boundary formation was solely due to production of bacteriocins, called proticines; however, boundaries formed even when no proticines were present (Senior, J Gen Micro 102:235).
This phenomenon is of value in differentiating the two strains of Proteus for epidemiological purposes. The earlier entry below is not consistent with the current (2009) scientific understanding:
[This line of inhibited growth results from the production of and sensitivity to different types of bacteriocins, namely, proticines, produced by different strains of Proteusspecies.
If two strains were able to detect different proticines produced by a neighbor, there would be growth inhibition and the formation of a Dienes line. Alternatively, if no proticine difference were detected, the neighboring swarmer would be recognized as "self" and the swarms would interact.]
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Is a biological phenomenon while is a psychological phenomenon.?
A biological phenomenon is a process or event that occurs within a living organism, involving physical and chemical aspects of the body. On the other hand, a psychological phenomenon refers to a mental or cognitive process that occurs in the mind, such as thoughts, emotions, or behaviors.
Does human dictates phenomenon or phenomenon dictates human?
The relationship between human behavior and natural phenomena is complex and bidirectional. While humans can influence and shape phenomena through their actions, phenomena can also influence and affect human behavior. It is a dynamic interaction where both parties can impact each other in various ways.
When a small amount of one hormone allows a second hormone to have its full effect the phenomenon is called?
When a small amount of one hormone allows a second hormone to have its full effect the phenomenon is called
How often does genetic material experience the phenomenon of crossing over during the process of meiosis?
During the process of meiosis, genetic material experiences the phenomenon of crossing over once per pair of homologous chromosomes.
Phosphorescence is a phenomenon associated with which algal division?
Phosphorescence is a phenomenon associated with the algal division Dinoflagellata. These algae can produce light through a chemical reaction, which is commonly observed in marine environments at night as a blue-green glow known as bioluminescence.
When was Katherine Dienes born?
Katherine Dienes was born in 1970.
When was Sari Dienes born?
Sari Dienes was born in 1898, in Hungary.
When was András Dienes born?
András Dienes was born on 1974-10-15.
When was Zoltán Pál Dienes born?
Zoltán Pál Dienes was born in 1916.
What is the birth name of Sari Dienes?
Sari Dienes's birth name is Sari Dieves.
When did Sari Dienes die?
Sari Dienes died in 1992, in USA of unknown causes.
What are dienes blocks?
Dienes Blocks are multi-base blocks developed by Dr. Zoltan Paul Dienes for teaching numeration. They mainly teach students how to determine place value in mathematics.
What is a dienes block in mathematices?
dienes block are blocks used by students to demonstrate understanding of place value
Why are conjugated dienes more stable than isolated dienes?
Conjugated dienes are more stable than isolated dienes due to delocalization of pi electrons across the double bonds in the conjugated system. This delocalization lowers the overall energy of the system, making it more stable. In contrast, isolated dienes have localized pi electrons which do not benefit from this delocalization and are therefore less stable.
What are dienes?
In organic chemistry a diene ( /ˈdaɪ.iːn/ DY-een) or diolefin (/daɪˈoʊləfɨn/ dy-OH-lə-fin) is a hydrocarbon that contains two carbon double bonds. Conjugated dienes are functional groups, with a general formula of CnH2n-2. Dienes and alkynes are functional isomers. Dienes occur occasionally in nature but are widely used in the polymer industry.
What has the author Andre De Dienes written?
Andre De Dienes has written: 'Andre De Dienes, Marilyn 2007 Calendar' 'Marilyn Mon Amour' 'Sun-Warmed Nudes'
Why cumulative dienes are less stable than isolated?
Cumulative dienes, which have two double bonds adjacent to each other, are less stable than isolated dienes due to increased electron repulsion and steric strain between the overlapping π bonds. This proximity makes the double bonds more reactive and less stable compared to isolated dienes, where the double bonds are separated by at least one single bond, allowing for greater spatial separation and reduced electron repulsion. Additionally, cumulative dienes lack the resonance stabilization that can be present in isolated dienes, further contributing to their lower stability.
