Navigation Links
FERMENTATION BASICS

roorganisms display an optimum pH for growth at around 7, with the majority favoring the pH range 5-8. However, there are exceptions including acetic acid bacteria, thiobacilli and urea decomposing bacteria. In addition numerous algae live in natural waters above pH 10.


2.3. Microbial kinetics
BATCH FERMENTATION

A batch fermentation can be considered to be a closed system. At time t=0 the sterilized nutrient solution in the fermentor is inoculated with microorganisms and incubation is allowed to proceed. In the course of the entire fermentation, nothing is added, except oxygen (in case of aerobic microorganisms), an antifoam agent, and acid or base to control the pH. The composition of the culture medium, the biomass concentration, and the metabolite concentration generally change constantly as a result of the metabolism of the cells.

After the inoculation of a sterile nutrient solution with microorganisms and cultivation under physiological conditions, four typical phases of growth are observed as indicated in Fig.2.


Lag phase
Physicochemical equilibration between microorganism and the environment following inoculation with very little growth.

Log phase
By the end of the lag phase cells have adapted to the new conditions of growth. Growth of the cell mass can now be described quantitatively as a doubling of cell number per unit time for bacteria and yeasts, or a doubling of biomass per unit time for filamentous organisms as fungi. By plotting the number of cells or biomass against time on a semilogarithmic graph, a straight line results, hence the term log phase. Although the cells alter the medium through uptake of substrates a
'"/>

Source:


Page: All 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Related biology technology :

1. P. pastoris Fermentation using a BioFlo 110 Benchtop Fermentor
2. E. coli Fermentation Using a BioFlo 110 Bench-Top Fermentor
3. Optimizing Your Benchscale Fermentation Process
4. High Yield Protein Production from Pichia pastoris Yeast: A Protocol for Benchtop Fermentation
5. Glossary for The BioPharm Guide to Fermentation and Cell Culture
6. Fundamentals of Fermentation: Techniques For Benchtop Fermentors
7. 140-Fold Increase of Protein Achieved in Pichia Fermentation
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: FERMENTATION BASICS

(Date:7/10/2014)... Robert Harman, DVM, Founder and CEO of Vet-Stem, ... announce the relaunch of his highly informative blog, now named ... “ What are Stem Cells ?” Dr. Harman’s purpose ... in the basics of stem cell therapy so that pet ... of treatment when considering regenerative medicine. , A veterinarian by ...
(Date:7/10/2014)... Montreal, QC (PRWEB) July 10, 2014 ... comfort and convenience. This rejuvenating device now comes with a ... that develops over time. , The new cup is thinner ... This design works to target rough, thin and uneven surfaces ... original firm cup for a stimulating treatment on areas such ...
(Date:7/10/2014)... , July 10, 2014  Franciscan St. ... of capnography for respiratory monitoring outside the ... healthcare leaders in embracing state-of-the-art patient safety ... patients are breathing and can alert medical ... measuring the amount of carbon dioxide the ...
(Date:7/10/2014)...  Kainos Capital, a firm specializing in acquiring and ... has acquired the Slim-Fast brand from Unilever. Unilever will ... the transaction were not disclosed. Slim-Fast is ... markets ready-to-drink shakes, powders, bars and snacks to retail ... in the United Kingdom and ...
Breaking Biology Technology:Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3Introducing a New Bonus Treatment Cup for EvoDerma’s NOOME Anti-Aging Motion 2Franciscan St. Anthony Health-Crown Point Underscores Patient Safety Commitment Through Expanded Use of Capnography 2Kainos Capital Acquires Slim-Fast From Unilever 2
... N.C. , May 13 Chimerix, Inc., ... the commencement of a first-in-human study of CMX157, a ... in vitro activity against both tenofovir-sensitive and tenofovir-resistant ... increase efficacy and decrease toxicity as compared to tenofovir, ...
... LA JOLLA, Calif. , May 13 Transdel ... focused on developing topically administered products using its proprietary transdermal ... March 31, 2010 .  The Company also highlighted recent ... , ...
... , DUBLIN and PHILADELPHIA , ... ), the global specialty biopharmaceutical company,announces that its subsidiary Shire LLC has ... Delaware against Actavis Elizabeth LLC and,Actavis Inc. (collectively "Actavis") for the ... and 6,811,794,(the ,794 patent). , , ...
Cached Biology Technology:Chimerix Initiates Phase 1 Study of CMX157 2Chimerix Initiates Phase 1 Study of CMX157 3Transdel Pharmaceuticals Reports First Quarter 2010 Results 2Transdel Pharmaceuticals Reports First Quarter 2010 Results 3Transdel Pharmaceuticals Reports First Quarter 2010 Results 4Transdel Pharmaceuticals Reports First Quarter 2010 Results 5INTUNIV(TM) - Shire Files Suit Against Actavis Elizabeth LLC and Actavis Inc. 2INTUNIV(TM) - Shire Files Suit Against Actavis Elizabeth LLC and Actavis Inc. 3
(Date:7/10/2014)... The Marshall Institute for Interdisciplinary Research (MIIR) and ... Medicine today announced they will be partnering with ... drugs. , Under the agreement with Shanghai-based HD ... the costs and risks of discovery and development ... own any intellectual property and commercialization rights to ...
(Date:7/10/2014)... 2014 Amidst the astounding complexity of the billions ... the brain, how do nerve cells decide how far ... do they coordinate these events within the developing brain? ... campus of The Scripps Research Institute (TSRI) have shed ... particular protein plays a far more sophisticated role in ...
(Date:7/10/2014)... Ore. Nuclear engineers at Oregon State University have ... device that should help people all over the world ... intensity, and whether or not it poses a health ... to public demand following the nuclear incident in Fukushima, ... what level of radiation they were being exposed to ...
Breaking Biology News(10 mins):Marshall University to partner with international company in drug development venture 2Scripps Florida scientists shed new light on nerve cell growth 2Sophisticated radiation detector designed for broad public use 2Sophisticated radiation detector designed for broad public use 3
... research into cheetah cub survival has refuted the theory that ... cannot coexist in conservation areas. The study, published in the ... Kgalagadi Transfrontier Park were seven times more likely to survive ... found to be the cubs, main predatory threat. Previously, ...
... MA -- Researchers at MIT and Brigham and Women,s ... of intestinal stem cells, then stimulate them to develop ... intestinal cells. Using these cells, scientists could develop and ... colitis. The small intestine, like most other body ...
... approach to mapping how proteins interact with each other, ... aid in the design of new drugs for diseases ... artificial amino acids, the Salk scientists determine the detailed ... the molecule that turns it on. The switch--corticotrophin releasing ...
Cached Biology News:Researchers unlock a new means of growing intestinal stem cells 2Researchers unlock a new means of growing intestinal stem cells 3Salk scientists crack riddle of important drug target 2Salk scientists crack riddle of important drug target 3
... include: Microarray hybridization chamber assembly (1 ... clamp, thumbscrew) Microarray chamber user guide ... intended to be cleaned and reused. The ... Catalog Oligo Microarray kits and all custom ...
... With the macro- and ... Hoagland and Arnon (1938). ... to contain 1.6 grams ... liter of medium. Physical ...
... separation and fractionation of nucleic-acid ... nuclei from cytosolic proteins A ... greatly facilitating study of low-abundance ... acid binding proteins (e.g., transcription ...
... modifications of Eagle's medium have ... formulation. The most widely used ... DME is a modification of ... that contains a higher concentration ...
Biology Products: