Dr. George Stephenson
M.V.Sc Poultry Science
Techno-Commercial Manager for Enzymes to provide service to Poultry integrators, commercial feed millers and consultants. Sales support to the regional sales and marketing team.
M.V.Sc Poultry Science
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Dr. George Stephenson likes the video:
Dr. Manish Kumar Singh, Marketing Director for South Central Asia at Novus International, speaks about the commitment of Novus in this region helping the farmers to reduce the use of antibiotics and how Novus is approaching the market with innovative and sustainable solutions, during Poultry India 2019
Dr. George Stephenson likes this technical article:
ABSTRACT Enteric infections such as coccidiosis and necrotic enteritis in broilers may have a large influence on the endogenous amino acids (eAA) losses within the gastrointestinal tract (GIT). Although not much is known on this topic, more information is available on the effects of these diseases on the apparent ileal digestibility (AID) of amino acids. There are many factors that must be consid ...
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Dr. Waldroup - in my opinion - is the foremost authority of brolier nutrition. I think it would be of great value if Dr. Waldroup would extend his comment regarding enzymes. Perhaps Engormix should invite him to make a presentation on this topic. Thank you.
Dr. George Stephenson likes the comment:
For many years, when working with an enzyme producer, we suggested that a combination of enzymes would most likely be the most effective but almost to a man they screamed no, it would just be helping our competitor... not realizing it would enhance their own product.
Dr. George Stephenson likes the comment:
Very good discussion. As many of us realize that it is the common misunderstanding of enzymes mode of action in general and the fact that they "Share" a common pool of nutrients, mainly energy and AA. This remains to be a subject that is not clear for the end user who struggles most of the times with the matrices provided by enzymes producers and the fact that some of them ignore such facts in pur ...
Dr. George Stephenson likes the comment:
The reality - in my view- is that results with other enzymes different than Phytases are VERY equivocal. It is so for many reasons including: 1. Lack of precise info on feed substrate for the enzyme2. Poorly estimated energy values for ingredientes and formulas 3. Inter brand enzyme activities comparison today is close to impossible: units are completely different. 4. It is not certain if "purifi ...
Dr. George Stephenson likes the comment:
Park W. Waldroup yes this is because FTU is measured at a pH of 5.5 in the method, while the phytase needs to work at lower pH levels. so any phytase which has a pH optimum at 2-4 will have a high activity but might have a lower FTU analysed at pH 5.5 compared to a phytase which has a pH optimum at around 5.5 but much lower activity at pH 2 to 4.
Dr. George Stephenson likes the comment:
Park W. Waldroup I think FTU, in a generic sense, is largely meaningless from a biological effect perspective but provides a moderately useful index against which phytases can be traded and registered with the appropriate authorities. From the perspective of the animal though, FTU (which is typically measured with substrate, cation, pH etc conditions of limited practical relevance), is poorly corr ...
Dr. George Stephenson likes the comment:
in our many studies involving numerous phytase products, it seems like the term FTU is totally meaningless. supposedly 500 FTU from phytase A should be equal to 500 FTU from phytase b but seldom is.
Dr. George Stephenson likes the video:
Kristjan Bregendahl (Devenish Nutrition) discussed amino acid profile studies and ratio estimations, during the Multi-State Poultry Feeding and Nutrition Conference in Indianapolis, USA.
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Location:Delhi, Delhi, India
Profile: Professional
Professional Title: M.V.Sc Poultry Science
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