July 2010 Lab News


Cervantes-Pahm, S. F., and H. H. Stein. 2010. Ileal digestibility of amino acids in conventional, fermented, and enzyme treated soybean meal and in soy protein isolate, fishmeal, and casein fed to weanling pigs. J. Anim. Sci.  88:2674-2683.

Pahm, A. A., C. Pedersen, D. Simon, and H. H. Stein. 2010. A preliminary study on the length of incubation needed to maximize guanidination of lysine in distillers dried grains with solubles (DDGS) and in pig ileal digesta. Anim. Feed Sci. Technol. 159:68-71.

Personnel changes

Dr. Rommel C. Sulabo joined our group as a post doctoral researcher. Dr. Sulabo holds a Bachelors degree from the University of Philippines at Los Banos. He obtained his Masters Degree from South Dakota State University where he was the third graduate student in the Stein Monogastric Nutrition Laboratory. He later completed his doctoral work at Kansas State University, Manhattan, KS. Rommel Sulabo also has extensive experience working in the swine and feed industries in the Philippines. Rommel will be working on several research projects and will help out as needed in many areas. We are very happy to have Rommel back in our group. 

Brenda L. Almaguer joined us as a visiting scholar and she will spend 6 month in our group. Brenda is a Masters student at the National University in Queretaro, Mexico, where she is working in the area of weanling pig nutrition with Dr. Tercia de Sousa Reis. Brenda will complete an experiment related to phosphorus digestibility in protein meals while she is in our group. She has already started the animal work for this experiment.

Tanawong Maison is our new PhD student. Tanawong comes to us from Thailand where he has worked for the last 8 years for CP Group, which is the largest feed company in Asia. Tanawong has worked in feed formulation and technical service in Thailand, Vietnam, and Cambodia. He obtained his BS and MS degrees at Kasetsart University in Bankok, Thailand.  He will conduct his PhD work in our group by evaluating canola meal produced from conventional and novel varieties of canola.

Lab activities

Jung completed the animal part of his experiment and is now analyzing the samples he collected.

Scott continued his work to determine the effects of pig BW on P digestibility in pigs and completed the 50 kg collections.

Brenda initiated an experiment to measure the standardized total tract digestibility of P in palm kernel expellers, palm kernel meal, and copra expellers.

Grant continued his experiments to evaluate diets low in tryptophan.

John Mathai, one of our undergraduate students, initiated 3 experiments to measure amino acid, energy, and phosphorus digestibility in new protein ingredients produced for weanling pig diets.

Ferdinando started writing his literature review and the initial protocols for experiments towards his PhD dissertation that will focus on measuring heat damage in several different feed ingredients.

Oscar worked on the samples he collected early this summer and is trying to get all the analyses completed so he can start summarizing data.

Sarah also continued working on the samples she collected to measure carbohydrate digestibility in different cereal grains.


All the students in the group and Kate Horsman, Rommel Sulabo, and Dr. Stein travelled to Denver, CO, to participate in the Joint Annual Meetings that were held in Denver this year. We presented the following 7 abstracts at the meetings:

  1. Urriola, P. E., and H. H. Stein. Evaluation of in vitro procedures to measure digestibility of fiber in distillers dried grains with solubles.
  2. Goebel, K. P., and H. H. Stein. Fat digestibility in enzymatically treated soybean meal without and with choice white grease and vegetable oil.
  3. Petersen, G. I., and H. H. Stein. Amino acid digestibility in corn, soybean meal, field peas, and corn co-products fed to weanling pigs.
  4. Almeida, F. N., and H H. Stein. Effects of a novel phytase on phosphorus digestibility in corn-soybean meal diets fed to weanling and growing pigs.
  5. Gonzales, J. C.,  B. G. Kim, J. K. Htoo, A. Lemme, and H. H. Stein. Amino acid digestibilityin heated soybean meal fed to growing pigs.
  6. Kim, B. G., and H. H. Stein. Effects of ileal sample collection strategies on ileal digestibility of CP and the concentration of chromium in ileal digesta.
  7. Almeida, F. N., and H. H. Stein. Standardized total tract digestibility of P in corn and corn co-products without and with microbial phytase.

Dr. Stein also travelled to Puerto Vallarta in Mexico and gave a presentation at “Simposio Internacional sobre Nutrición y Alimentación en Aves y Cerdos”. His presentation was entitled “Vision Academia”.