The document outlines steps to isolate antibiotic-producing microorganisms from soil samples and determine their antimicrobial activity. Students will isolate Bacillus, Penicillium, and Actinomyces colonies on agar plates. Colonies will be streaked on plates seeded with Staphylococcus epidermidis or fungi to check for evidence of antibiosis. Colonies showing inhibition will be re-streaked with test pathogens to confirm antimicrobial activity through zone of inhibition assays. The goal is to isolate microbes producing antibiotics that could have clinical significance.
Secondary screening of industrial important microbes DhruviSuvagiya
Detection and isolation of a microorganism from a natural environment like soil containing large number of microbial population is called as screening. It is very time consuming and expensive process.
Basic Knowledge about industrial microorganism. why industry choose microorganism rather than chemical. isolation technique of microorganism. source of microorganisms. Process of using microorganism. Disadvantages of using microorganisms in industry. Process of genetic modification of microorganisms. Storage process of microorganism. preservation methods of microorganism. Reculture methods of microorganism.
Secondary screening of industrial important microbes DhruviSuvagiya
Detection and isolation of a microorganism from a natural environment like soil containing large number of microbial population is called as screening. It is very time consuming and expensive process.
Basic Knowledge about industrial microorganism. why industry choose microorganism rather than chemical. isolation technique of microorganism. source of microorganisms. Process of using microorganism. Disadvantages of using microorganisms in industry. Process of genetic modification of microorganisms. Storage process of microorganism. preservation methods of microorganism. Reculture methods of microorganism.
Production of tetracyclin and cephalosporinSamsuDeen12
Tetracyclin and cephalosporins are one of the major used antibiotics commonly all around the world. They are used to treat against microorganisms as a bactericidal, these eliminates those organisms in the host through various mechanism. These antibiotics are produced in a large scale using a bioreactors in many countries.
The following presentation is only for quick reference. I would advise you to read the theoretical aspects of the respective topic and then use this presentation for your last minute revision. I hope it helps you..!!
Mayur D. Chauhan
Introduction :
Antibiotics are antimicrobial agents produced naturally by other microbes (usually fungi or bacteria)
The first antibiotic was discovered in 1896 by Ernest Duchesne and in 1928 "rediscovered" by Alexander Fleming from the filamentous fungus Penicilium notatum.
The antibiotic substance, named penicillin, was not purified until the 1940s (by Florey and Chain), just in time to be used at the end of the second world war.
Penicillin was the first important commercial product produced by an aerobic, submerged fermentation
New antibiotics with unique properties and specificities
Produced by genetic manipulation
of the genes
involved in the biosynthesis of existing antibiotics
Researchers began by examining the consequences of placing two different antibiotic production pathways into one organism.
Each of the antibiotics (actinorhodine, medermycin, granaticin, dihydrogranaticin) functions as an acid-base indicator, conferring on a growing culture a characteristic color that depends on the compounds being synthesized.
This presentation is about what exactly is penicillin and how it was discovered along with its industrial production process from fermentors until yield.
Production of tetracyclin and cephalosporinSamsuDeen12
Tetracyclin and cephalosporins are one of the major used antibiotics commonly all around the world. They are used to treat against microorganisms as a bactericidal, these eliminates those organisms in the host through various mechanism. These antibiotics are produced in a large scale using a bioreactors in many countries.
The following presentation is only for quick reference. I would advise you to read the theoretical aspects of the respective topic and then use this presentation for your last minute revision. I hope it helps you..!!
Mayur D. Chauhan
Introduction :
Antibiotics are antimicrobial agents produced naturally by other microbes (usually fungi or bacteria)
The first antibiotic was discovered in 1896 by Ernest Duchesne and in 1928 "rediscovered" by Alexander Fleming from the filamentous fungus Penicilium notatum.
The antibiotic substance, named penicillin, was not purified until the 1940s (by Florey and Chain), just in time to be used at the end of the second world war.
Penicillin was the first important commercial product produced by an aerobic, submerged fermentation
New antibiotics with unique properties and specificities
Produced by genetic manipulation
of the genes
involved in the biosynthesis of existing antibiotics
Researchers began by examining the consequences of placing two different antibiotic production pathways into one organism.
Each of the antibiotics (actinorhodine, medermycin, granaticin, dihydrogranaticin) functions as an acid-base indicator, conferring on a growing culture a characteristic color that depends on the compounds being synthesized.
This presentation is about what exactly is penicillin and how it was discovered along with its industrial production process from fermentors until yield.
penicillins - power point - History,mechanism of action,classification,chemis...Dr. Ravi Sankar
Antibiotics - Penicillin's - power point - History, mechanism of action, classification, chemistry, SAR, Nomenclature, uses, side effects- Medicinal chemistry.
Prof. P. Ravisankar M. Pharm., Ph.D.
HOD .,
Vignan Pharmacy college
vadlamudi- Guntur-A.P, India.
banuman35@gmail.com
Phone: 0 9059994000
0 9000199106
Explanation on the industrial production of penicillin covering the history, fermentors, specific conditions required for penicillin production, how to increase yield amongst others.
Antibiotics,antibiotics resistances,classification of antibiotics,misuse of antibiotics details discussed here. for more information visit my blog helpful for pharmacy and medical student.thanks.
http://mydreamlan.wordpress.com/category/education/
Optimization of Medium for the Production of Streptomycin By Streptomyces Gri...inventionjournals
International Journal of Pharmaceutical Science Invention (IJPSI) is an international journal intended for professionals and researchers in all fields of Pahrmaceutical Science. IJPSI publishes research articles and reviews within the whole field Pharmacy and Pharmaceutical Science, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
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The search for new antibiotics continues in a rather overlooked hunting ground. In the course of screening for new antibiotic-producing microorganisms, isolates showing antimicrobial activity were isolated from waste soil samples from various habitats in the Industrial Areas in Dheradun, Uttarakhand, India. Existing methods of screening for antibiotic producers together with some novel procedures were reviewed. Both modified agar-streak and agar-plug methods were used in the primary screens. The use of selective isolation media, with or without antibiotic incorporation and/or heat pretreatment, enhanced the development of certain actinomycete colonies on the isolation plates. Antibiotics have long been considered the “magic bullet” that would end infectious disease. Although they have improved the health of countless numbers of humans and animals, many antibiotics have also been losing their effectiveness since the beginning of the antibiotic era. Bacteria have adapted defenses against these antibiotics and continue to develop new resistances, even as we develop new antibiotics. In recent years, much attention has been given to the increase in antibiotic resistance. As more microbial species and strains become resistant, many diseases have become difficult to treat, a phenomenon frequently ascribed to both indiscriminate and inappropriate use of antibiotics in human medicine. However, the use of antibiotics and antimicrobials in raising food animals has also contributed significantly to the pool of antibiotic resistant organisms globally and antibiotic resistant bacteria are now found in large numbers in virtually every ecosystem on earth. Dual culture bioassays were used to screen seven selected Bacillus isolates for activity against four plant pathogenic fungi in vitro. All isolates were able to inhibit the pathogens to varying degrees. Two isolates, R29 and B81, were selected for further testing and characterization. Further bioassays were performed on five complex nutrient media which were adjusted to pH S.S and 7, and both incubated at 2SoC and 30°C" respectively. It was found that pH and media composition showed significant influences on the antifungal activities of the isolates tested, but that a SoC temperature difference in incubation temperature did not. Tryptone soy agar was found to give rise to the largest inhibition zones. Both isolates were tentatively identified using standard biochemical and morphological tests. Based on its phenotypic characteristics, R29 was identified as a strain of B. subtilis. B81 proved to be more difficult to assign to a specific group or species of Bacillus, though B. subtilis and B. licheniformis were considered to be the nearest candidates. Genomic DNA was extracted from both isolates and a portion of each of their 16s rDNA genes were amplified and sequenced for homology testing against the GeneBank database. Homology testing confirmed that both isolates were members of the genus Bacillus and most
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Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
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Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
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In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
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And...
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Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
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Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
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We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
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We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
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Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
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Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
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During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
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https://www.rttsweb.com/jmeter-integration-webinar
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Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
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UI automation Sample
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Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
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Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
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1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
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Orchestrator execution result
Defect reporting
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I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
"Impact of front-end architecture on development cost", Viktor Turskyi
Lab 6 isolation of antibiotic producer from soil
1.
2. • Subject objective: Each student should be able to
• To isolate antibiotic-producing microorganisms
(Bacillus, Penicillium and Actinomycetes colonies)
from soil that may be antibiotic producers.
• To determine the spectrum of the antimicrobial activity
of the isolated antibiotic against some clinical
important bacteria (Staphylococcus epidermidis as a
Gram positive and Escherichia coli as a Gram-
negative bacteria).
• Biological assay for screening of antimicrobial activity.
• Reporter screening
3. Principle:
• The antibacterial effect of penicillin was discovered by Alexander Fleming in
1929. He noted that a fungal colony had grown as a contaminant on an agar plate
streaked with the bacterium Staphylococcus aureus, and that the bacterial colonies
around the fungus were transparent, because their cells were lysing. Fleming had
devoted much of his career to finding methods for treating wound infections, and
immediately recognised the importance of a fungal metabolite that might be used to
control bacteria. The substance was named penicillin, because the fungal
contaminant was identified as Penicillium notatum. (See Figure A) Fleming found
that it was effective against many Gram positive bacteria in laboratory conditions, and
he even used locally applied, crude preparations of this substance, from culture
filtrates, to control eye infections.
• The phenomenal success of penicillin led to the search for other antibiotic-
producing microorganisms, especially from soil environments. One of the early
successes (1943) was the discovery of streptomycin from a soil actinomycete,
Streptomyces griseus. actinomycetes are bacteria that produce branching filaments
rather like fungal hyphae, but only about 1 micrometer diameter. They also produce
large numbers of dry, powdery spores from their aerial hyphae. Actinomycetes,
especially Streptomyces species, have yielded most of the antibiotics used in clinical
medicine today. Some examples are shown in the table (1).
• Other bacteria, including Bacillus species (see Figure E: Agar plate showing inhibition
of fungal growth by a contaminating colony of Bacillus species.), have yielded few
useful antibiotics. Fungi also have yielded few useful antibiotics. Apart from penicillin,
the most important antibiotics from fungi are the cephalosporins (beta-lactams with
similar mode of action to penicillin, but with less allergenicity).
4. Figure E. The constant search of soils throughout the world has yielded an abundance of
antibiotics of great value for the treatment of many infectious diseases. Pharmaceutical
companies are in constant search for new strains of bacteria, molds, and Actinomyces that can be
used for antibiotic production. Although many organisms in soil produce antibiotics, only a small
portion of new antibiotics are suitable for medical use. In this experiment an attempt will be
made to isolate an antibiotic-producing Bacillus, Actinomyces and Penicillium from soil.
Students will work in group. Figure 1 illustrates the procedure.
5. • Antimicrobial agents: are substances that are naturally produced by a variety of
microorganisms (primarily Actinomycetes, fungi and bacteria), or have been
synthesized in the laboratory, or a combination of both.
• Antibiotic: refers only to those antimicrobial substances produced by
microorganisms, but the term is often used interchangeably with antimicrobial agent.
Antimicrobial agents have inhibitory or lethal effects on many pathogenic organisms
(especially bacteria) that cause infectious diseases.
• Antibiotic producer such as:
Antibiotics are the best known products of actinomycete. Over 5000 antibiotics have
been identified from the culture of gram positive, gram negative organisms and
filamentous fungi, but only100 antibiotics have been commercially used to treat
human, animal and plant disease. The genus Streptomycete is responsible for the
formation of more than 60% of known antibiotics. While further 15% are made by
number of related Actinomycete, Micromonospora, Actinomadura, Streptoverticillium
and Thermoactinomycetes
1. Streptomyces spp.: produce (Chloramphenicol, Erythromycin, Kanamycin,
Neomycin, Nystatin, Rifampin, Streptomycin, Tetracyclines, Vancomycin)
2. Micromonospora: produce (Gentamicin)
3. Bacillus:Produce (Bacitracin, polymxins)
4. Fungi:
• Penicillium griseofulvum: produce (Griseofulvin)
• Cephalosporium: produce Cephalosporins
6.
7. Some clinically important antibiotics
Site or mode of
Antibiotic Producer organism Activity
action
Penicillin Penicillium chrysogenum Gram-positive bacteria Wall synthesis
Cephalosporin Cephalosporium acremonium Broad spectrum Wall synthesis
Griseofulvin Penicillium griseofulvum Dermatophytic fungi Microtubules
Bacitracin Bacillus subtilis Gram-positive bacteria Wall synthesis
Polymyxin B Bacillus polymyxa Gram-negative bacteria Cell membrane
Amphotericin B Streptomyces nodosus Fungi Cell membrane
Erythromycin Streptomyces erythreus Gram-positive bacteria Protein synthesis
Neomycin Streptomyces fradiae Broad spectrum Protein synthesis
Streptomycin Streptomyces griseus Gram-negative bacteria Protein synthesis
Tetracycline Streptomyces rimosus Broad spectrum Protein synthesis
Vancomycin Streptomyces orientalis Gram-positive bacteria Protein synthesis
Gentamicin Micromonospora purpurea Broad spectrum Protein synthesis
Rifamycin Streptomyces mediterranei Tuberculosis Protein synthesis
8. • Why the few antibiotics are clinically useful?
• Several hundreds of compounds with antibiotic activity have been
isolated from microorganisms over the years, but only a few of them are
clinically useful. The reason for this is that only compounds with selective
toxicity can be used clinically - they must be highly effective against a
microorganism but have minimal toxicity to humans. In practice, this is
expressed in terms of the therapeutic index - the ratio of the toxic dose to
the therapeutic dose. The larger the index, the better is its therapeutic value.
So the antibacterial product should be assessed by pharma and then decide
to put in the market when it passes ADME/T test
• It will be seen from the table above, that most of the antibacterial agents
act on bacterial wall synthesis or protein synthesis. Peptidoglycan is one of
the major wall targets because it is found only in bacteria. Some of the other
compounds target bacterial protein synthesis, because bacterial ribosomes
(termed 70S ribosomes) are different from the ribosomes (80S) of humans
and other eukaryotic organisms. Similarly, the one antifungal agent shown in
the table (griseofulvin) binds specifically to the tubulin proteins that make up
the microtubules of fungal cells; these tubulins are somewhat different from
the tubulins of humans.
9. • Factors affecting antibiotic production:
1. Medium Composition:
• Carbon source
• Nitrogen source
• Inorganic phosphates
• Inorganic salts
• Trace metals
• Precursors
• Inhibitors
• Inducers
2. Fermentation Conditions:
• pH
• Temperature
• Oxygen
• How can determine the target of inhibitor molecule which may inhibit one of
the biological pathways?
There are many different pathwaies can be applied such as reporter essay by using •
the reporter strains
11. This lab. Consist
of three steps
Colony selection Evidence of antibiosis
Primary isolation & &
Inoculation Confirmation
12. FIRST STEP:
• (Primary Isolation)
Unless the organisms in a soil sample are thinned out sufficiently, the isolation of
potential antibiotic producers is nearly impossible.
Materials per group of students:
1. six large test tubes, one bottle of physiological saline solution
2. Three Petri plates of glycerol yeast extract agar, Tryptic soy agar, Sabouraud
dextrose agar.
3. L-shaped glass rod, beaker of alcohol
4. six 1 ml pipettes, one 10 ml pipette
• Procedure:
1. Label six test tubes, and with a 10 ml pipette, dispense 9 ml of saline into each tube.
2. Weigh out 1 g of soil and deposit it into tube 1.
3. Vortex mix tube 1 until all soil is well dispersed throughout the tube.
4. Make a tenfold dilution from tube 1 through tube 6 by transferring 1 ml from tube to
tube. Use a fresh pipette for each transfer and be sure to pipette-mix thoroughly
before each transfer.
5. Label three Petri plates with your initials and the dilutions to be deposited into them.
6. From each of the last three tubes transfer 1 ml to a plate of glycerol yeast extract
agar.
7. Spread the organisms over the agar surfaces on each plate with an L-shaped glass
rod that has been sterilized each time in alcohol and open flame. Be sure to cool rod
before using.
14. • SECOND STEP
(Colony Selection and Inoculation)
• The objective in this laboratory period will be to select Bacillus, Penicillium and Actinomyces-
like colonies that may be antibiotic producers. The organisms Penicillium sp and Actinomyces
will be streaked on nutrient agar plates that have been seeded with Staphylococcus
epidermidis, and Bacillus will be streaked on nutrient agar plates that have been streaked
firstly by fungi, after incubation we will look for evidence of antibiosis. Students will continue to
work in groups. Figure 2 illustrates the procedure.
• Materials per group of students:
1. four trypticase soy agar pours (liquefied)
2. four sterile Petri plates
3. TSB culture of Staphylococcus epidermidis, Bacillus firmus, and Penicillium sp.
4. 1 ml pipette
5. three primary isolate plates from previous period water bath at student station (50° C)
Procedure:
1. Place four liquefied agar pours in water bath (50°C) to prevent solidification, and then inoculate
each one with 1 ml of S. epidermidis.
2. Label the Petri plates with your initials and date.
3. Pour the contents of each inoculated tube into Petri plates. Allow agar to cool and solidify.
4. Examine the three primary isolation plates for the presence of Bacillus sp. Penicillium sp. and
Actinomyces-like colonies. Actinomyces have a dusty appearance due to the presence of
spores. They may be white or colored. Your instructor will assist in the selection of colonies.
5. Using a sterile inoculating needle, scrape spores from Penicillium sp. and Actinomyces-like
colonies on the primary isolation plates to inoculate the seeded TSA plates. Use inoculums from
a different colony for each of the four plates.
6. Incubate the plates at 30° C until the next laboratory period.
15. • THIRD AND FOURTH STEPS
(Evidence of Antibiosis and Confirmation)
• Examine the four plates you streaked during the last laboratory period. If
you see evidence of antibiosis (inhibition of S. epidermidis growth and
Fungal growth), proceed as follows to confirm results.
• Materials:
1. 3 Petri plates of trypticase soy agar
2. TSB culture of S. epidermidis, PDA culture of Penicillium and Aspergillus sp.
• Procedure:
1. If antibiosis is present for each of Actinomyces, Penicillium, Bacillus, use
three TSA plates and make two streaks on each of the TSA plates as shown
in figure 2. Make a straight line streak from (antibiotic producer
microorganisms)
2. cross-streak with organisms from a culture of S. epidermidis and
Aspergillus sp.
3. Incubate at 30° C until the next period.