Nelson Ruiz
Chemist, MS, PhD
Animal nutritionist with emphasis in poultry, feed quality assurance and quality control. Over 40 years of experience in the industry in feed formulation, antinutritional factors, metabolic problems.
Chemist, MS, PhD
Participation in Forum on December 14, 2020
Christoph Hutter. Dear Mr. Hutter, Absolutely, fermented soy bean meal with very low levels of both heat-labile and heat-stable anti-nutritional factors is an alternative to manage soy anti-nutritional factors in general, and in particular to manage rapid feed passage (a form of disbacteriosis in European terms) in broilers. We presented at the virtual Poultry Science Association meeting this year ...
Participation in Forum on October 28, 2020
Two quick responses: 1- Although we have not analyzed residual hexane in lots of commercial soybean meals involved in rapid feed passage in the field, there is not much justification to do that. First, hexane has been the main solvent used in the solvent-extraction process well before the 1990's when rapid feed passage started to be observed worldwide. Second, oilseed processing plants are quite e ...
Participation in Forum on October 12, 2020
Dear Mr. Hutter: Thank you for your comments. Here is in brief my response: 1- Yes indeed, rapid feed passage is observed mostly around 21 days of age and older in broilers depending on the actual concentration of trypsin inhibitors in the feed. Those trypsin inhibitors in the feed are derived either from soybean meal, or full-fat soybeans or both. However, in our experience, in several markets im ...
Participation in Forum on September 16, 2020
The following are comments on your interesting paper on rapid feed passage. Just for practical purposes and to make the discussion easier we always define what is rapid feed passage before we talk about it to be sure we are talking about the same issue: "Rapid feed passage is defined here as the condition in which broiler droppings lose their normal shape and consistency, do not display the charac ...
Participation in Forum on September 1, 2020
Dr. Andreas Lemme Dr. Lemme, would you please help me with the literature reference(s) supporting the concept that D-methionine has similar biological activity as DL-methionine, and perhaps as L-methionine? It would be highly appreciated.
Participation in Forum on August 19, 2020
Park W. Waldroup Dr. Waldroup, this discussion has been in the industry for decades, and you have actively participated with a lot of data over the years. So, I think that a little bit of history and actual data may help to illustrate, or better, illustrate again what you have done in reference to formulating to the least cost per balance calorie. At the 1995 Maryland Nutrition Conference (yes, 19 ...
Article published the August 13, 2020
The 50-year historical review of soybean meal (SBM ) published in Feedstuffs in 1970 by Dr. J.W. Hayward highlighted many of the pertinent advancements concerned with animal nutrition, product development and promotional aspects of U.S. SBM. In fact, 1920 marked not only the beginning of the industrial production of soybean oil and SBM in the U.S., but also the year that the American Soybean Assn. ...
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Participation in Forum on July 23, 2020
Congratulations Dr. Korver!
Participation in Forum on June 3, 2020
Dear Dr. Stringhini et al., in my assessment your data on soybean meal quality are very interesting. Based on our experience, and considering also several reports in the scientific literature, the range of adequacy for KOH protein solubility in soybean meal is in the range of 80-85%. Your data based on the analysis of 283 samples from the commercial reality show that 52.64% of the samples or 189 o ...
Video published on February 20, 2020
Nelson Ruiz (Nelson Ruiz Nutrition, LLC) commented on the relevance of this protein source in the animal production industry throughout the years, during IPPE 2020 in Atlanta, USA.
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Location:Atlanta, Georgia, United States
Profile: Professional
Professional Title: Chemist, MS, PhD
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