Why some bacteria (A. baumannii) showed negative result for oxidase test?

03 March 2018 0 6K Report

The disability of these bacteria to produce oxidase enzyme. On the contrary, positive results were shown for catalase test, citrate utilization test and the growth at 44ºC.

Thank you in advance

Badges
Science method

More Mohammed H. Musleh's questions See All

How can I get a full scholarship?

Hello.. I am looking for a PhD scholarship in Biology (Stem cell, Molecular Biology, Bioinformatic, Nanotechnology) My MSc thesis was on A Molecular Study of Aflatoxin and its Toxic Effect on...

01 February 2019 4,096 26 View

How can to be constant knowledge of what is new in my field so as not to lose my ability to keep abreast of the new application?

01 February 2019 7,730 9 View

How can Protect Your Intellectual Property ?

31 December 2018 10,118 47 View

Are we still evolving genetically?

Are there really, Evolution is continuous as long as this relationship persists. When the relationship is intercepted, the population goes extinct.

11 December 2018 4,338 28 View

How can you get all the reliable and detailed information you need about the genetic disease in minutes?

A genetic disorder is a condition that is caused by an abnormality in an individual's DNA. Abnormalities can be as small as a single-base mutation in just one gene, or they can involve the...

10 November 2018 7,815 31 View

Why is DNA stable but RNA is not?

DNA is a long polymer of simple units called nucleotides, which are held together by a backbone made of sugars and phosphate groups.This backbone carries four types of molecules called bases and...

09 October 2018 5,652 3 View

When the researcher with the right to be an author with another researcher?

Author is the creator or originator of any written work such as a book or play, and is thus also a writer. More broadly defined, an author is "the person who originated or gave existence to...

09 October 2018 844 3 View

Can you grow heart and brain using stem cells?

There are many different kinds of stem cells. I will discuss the most "powerful" ones here. They are called pluripotent stem cells (PSCs). Pluripotent stem cells are the master cells which can...

08 September 2018 3,725 5 View

How is DNA used in assembling nanoparticles?

DNA is a polymer whose repeating unit contains a phosphate group (PO4), a ribose ring, and a DNA base, which can be either Adenine (A), Thymine (T), Guanine (G), or Cytosine (C); the phosphate...

07 August 2018 4,868 2 View

Do neurons multiply? Is the stability of the image in brain caused by the non-duplication of neurons?

Hello Respected Seniors! Most of opinions reached by scientists are that the neurons do not multiply and do not have the ability to divide and multiply, If so that! Why is remember a person...

03 April 2018 6,978 1 View

Can I base on reverse DNA sequences to perform alignment, convert to amino acids and GenBank submission?

I have reverse sequences (AB1 format), can I base on reverse DNA sequences to perform nucleotide alignment, convert nucleotides to amino acids and deposit the sequence in GenBank database?

11 August 2024 5,138 1 View

Could it be a cell culture contamination?

Hello everyone! I observed in my culture (htert-RPE1 cells) an orange- red particle at the bottom of the dish. It is visible to the naked eye as a very very small red dot. Could it be a...

09 August 2024 2,824 3 View

How to confirm the site-directed mutagenesis result without performing NGS?

I'm cloning a fragment of 3200 nts into plasmid. The cloning was successful, however, 02 amino acids were mutated. Now I want to fix these 02 aa by site-directed mutagenesis technique using...

08 August 2024 4,645 2 View

I can't see the ssDNA band after performing asymmetric PCR. Is there any way to do this?

After performing symmetric PCR, PCR purification was performed. Afterwards, asymmetric PCR was performed using the PCR purification product as a template, but no ssDNA band was confirmed in the...

08 August 2024 1,668 3 View

Does crude extraction using NaOH and Tris work well with Fungi?

I'm trying to find a DNA extraction method for fungi that does not require equipment and heating. Is there anyone who can suggest an alternative option? Thank you

08 August 2024 4,733 2 View

What precautions should be taken while handling S. aureus enterotoxin Type B in the lab?

I would like to understand potential safety concerns while handling SEB in the lab. Especially while working in animal house facility. Would like to know precautions for handling. Sigma MSDS...

07 August 2024 6,034 3 View

How much total RNA concentration to be extracted from sorted plasma cells from bone marrow of C57BL/6 mice for RT-PCR ?

i have sorted anti-NP specific plasma cells from bone marrow of C57BL/6 mice at certain times after immunization with variable counts and isolated total RNA using TRIZOL method for RT-PCR using...

05 August 2024 8,835 1 View

Weak DAPI staining after immunohistochemistry - how to improve?

After immunohistochemistry of previously fixed in PFA and EtOH and then frozen 20 μm sections of zebrafish brain, DAPI staining is very weak (right) compared to the same sections stained without...

05 August 2024 9,637 2 View

"A Markov-like Model for Patient Progression"?

A Markov-like Model for Patient Progression" Markov Chain Monte Carlo (MCMC) Markov Chain Monte Carlo (MCMC) is a powerful computational technique used to draw samples from a probability...

05 August 2024 10,079 0 View

Why after performing site directed mutagenesis ,I don't see any colony after transformation?

I want to introduce a point mutation (change in one nucleotide) into my gene of interest (DNA binding domain) I have designed primers as recommended on the Data sheet of the kit : -Both primers...

05 August 2024 9,059 3 View