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REVIEW

Chemical alterations with nutritional consequences due to pelleting animal feeds: a review

Birger Svihus A B C and Ozren Zimonja A
+ Author Affiliations
- Author Affiliations

A Norwegian University of Life Sciences, N-1432 Aas, Norway.

B University of New England, Armidale, NSW 2351, Australia.

C Corresponding author. Email: birger.svihus@umb.no

Animal Production Science 51(7) 590-596 https://doi.org/10.1071/AN11004
Submitted: 14 January 2011  Accepted: 23 May 2011   Published: 27 June 2011

Abstract

Pelleting is an energy-demanding process that is carried out on many animal feeds to assure a large macro-structure and thus improved handling properties and a high and homogenous feed intake. Due to the heat applied during conditioning and pelleting, some chemical alterations may take place. Proteins are to some extent denatured, and this will potentially improve nutritional value through inactivation of proteinous antinutrients, although may contribute negatively through inactivation of exogenous enzymes. Only a small fraction of the starch will be gelatinised, and pelleting will not affect starch digestibility to any considerable extent. Some vitamins, however, may be destroyed during the pelleting process, and viscosity of soluble fibres may increase.


References

Adams JB (1991) Review: enzyme inactivation during heat processing of food-stuffs. International Journal of Food Science & Technology 26, 1–20.
Review: enzyme inactivation during heat processing of food-stuffs.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3MXktVOjtLo%3D&md5=b4bc01f8f65646cc7cf0b93c57065a0dCAS |

Anderson JS, Sunderland R (2002) Effect of extruder moisture and dryer processing temperature on vitamin C and E and astaxanthin stability. Aquaculture 207, 137–149.
Effect of extruder moisture and dryer processing temperature on vitamin C and E and astaxanthin stability.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XjtVSju74%3D&md5=2666ab3292c0028386e01d6631a5c0efCAS |

Ankrah NO, Campbell GL, Tyler RT, Rossnagel BG, Sokhansanj SRT (1999) Hydrothermal and β-glucanase effects on the nutritional and physical properties of starch in normal and waxy hull-less barley. Animal Feed Science and Technology 81, 205–219.
Hydrothermal and β-glucanase effects on the nutritional and physical properties of starch in normal and waxy hull-less barley.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXmsVWmurw%3D&md5=d147c9abb988f803408b0cb397046bb0CAS |

Asp NG, Björck I (1989) Nutritional properties of extruded foods. In ‘Extrusion cooking’. (Eds C Mecier, P Linko, JM Harper) pp. 399– 434. (American Association of Cereal Chemists: St Paul, MN)

Bernardin JE, Kasarda DD (1973) Hydrated protein fibrils from wheat endosperm. Cereal Chemistry 50, 529–536.

Björck I, Asp NG (1983) The effects of extrusion cooking on nutritional value – a literature review. Journal of Food Engineering 2, 281–308.
The effects of extrusion cooking on nutritional value – a literature review.Crossref | GoogleScholarGoogle Scholar |

Björck I, Eliasson AC, Drews A, Gudmundsson M, Karlsson R (1990) Some nutritional properties of starch and dietary fiber in barley genotypes containing different levels of amylose. Cereal Chemistry 67, 327–333.

Björck I, Liljeberg H, Östman E (2000) Low glycaemic-index foods. The British Journal of Nutrition 83, 149–155.

Briggs JL, Maier DE, Watkins BA, Behnke KC (1999) Effect of ingredients and processing parameters on pellet quality. Poultry Science 78, 1464–1471.

Carré B, Beaufils E, Melcion JP (1991) Evaluation of protein and starch digestibilities and energy value of pelleted or unpelleted pea-seeds from winter or spring cultivars in adult and young chickens. Journal of Agricultural and Food Chemistry 39, 468–472.
Evaluation of protein and starch digestibilities and energy value of pelleted or unpelleted pea-seeds from winter or spring cultivars in adult and young chickens.Crossref | GoogleScholarGoogle Scholar |

Cavalcanti WB (2004) The effect of ingredient composition on the physical quality of pelleted feeds: a mixture experimental approach. PhD Dissertation, Kansas State University, Manhattan, KS.

Cheftel JC (1986) Nutritional effects of extrusion cooking. Food Chemistry 20, 263–283.
Nutritional effects of extrusion cooking.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL28XkslOlsb8%3D&md5=fa0f7f8fb6f6ce9c642bbf353ebe8b34CAS |

Colonna P, Leloup V, Buleon A (1992) Limiting factors of starch hydrolysis. European Journal of Clinical Nutrition 46, 517–532.

Cowieson AJ, Hruby M, Isaksen MF (2005) The effect of conditioning temperature and exogenous xylanase addition on the viscosity of wheat-based diets and the performance of broiler chickens. British Poultry Science 46, 717–724.
The effect of conditioning temperature and exogenous xylanase addition on the viscosity of wheat-based diets and the performance of broiler chickens.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD28Xmtlyluw%3D%3D&md5=e8033d8ef797434559ceeddc0d8d6984CAS | 16428115PubMed |

Cramer KR, Wilson KJ, Moritz JS, Beyer RS (2003) Effect of sorghum-based diets subjected to various manufacturing procedures on broiler performance. Journal of Applied Poultry Research 12, 404–410.

Di Gioia L, Cuq B, Guilbert S (1998) Effect of plasticizers on thermomechanical properties of corn gluten meal. Cereal Chemistry 75, 514–519.
Effect of plasticizers on thermomechanical properties of corn gluten meal.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1cXkvVGqt70%3D&md5=997174fdc5144608997dce1c48dc5744CAS |

Donald AM (2001) Plasticization and self-assembly in the starch granule. Cereal Chemistry 78, 307–314.
Plasticization and self-assembly in the starch granule.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3MXktlWit7g%3D&md5=fc87e97075dcb75563f2870403e7beabCAS |

Eliasson AC, Gudmundsson M (1996) Starch: physicochemical and functional aspects. In ‘Carbohydrates in food’. (Ed. AC Eliasson) pp. 451–503. (Marcel Dekker: New York)

Finley JW (1989) Effects of processing on proteins: an overview. In ‘Protein quality and the effects of processing’. (Eds RD Phillips, JW Finley) pp. 1–8. (Marcel Dekker: New York)

Garcia M, Lazaro R, Latorre MA, Gracia MI, Mateos GG (2008) Influence of enzyme supplementation and heat processing of barley on digestive traits and productive performance of broilers. Poultry Science 87, 940–948.
Influence of enzyme supplementation and heat processing of barley on digestive traits and productive performance of broilers.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXmt1CgurY%3D&md5=aa061138cd516681d46c45de4bb59755CAS | 18420985PubMed |

Gilani GS, Cockell KA, Sepehr E (2005) Effects of antinutritional factors on protein digestibility and amino acid availability in foods. Journal of AOAC International 88, 967–987.

Gilpin AS, Herrman TJ, Behnke KC, Fairchild FJ (2002) Feed moisture, retention time, and steam as quality and energy utilization determinants in the pelleting process. Applied Engineering in Agriculture 18, 331–338.

Goelema JO, Smits A, Vaessen LM, Wemmers A (1999) Effects of pressure toasting, expander treatment and pelleting on in vitro and in situ parameters of protein and starch in a mixture of broken peas, lupins and faba beans. Animal Feed Science and Technology 78, 109–126.
Effects of pressure toasting, expander treatment and pelleting on in vitro and in situ parameters of protein and starch in a mixture of broken peas, lupins and faba beans.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXhsVWktrY%3D&md5=1ec531397f6dfd117528db12616813afCAS |

Graham H, Fadel JG, Newman CW, Newman RK (1989) Effect of pelleting and β-glucanase supplementation on the ileal and faecal digestibility of a barley-based diet in the pig. Journal of Animal Science 67, 1293–1298.

Hayta M, Alpaslan M (2001) Effects of processing on biochemical and rheological properties of wheat gluten proteins. Nahrung/Food 45, 304–308.
Effects of processing on biochemical and rheological properties of wheat gluten proteins.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3MXotlCqu7o%3D&md5=bcf9f6bbd25092490c591d98f9ac2adfCAS |

Holm J, Björck I (1988) Effects of thermal-processing of wheat on starch 2. Enzymic availability. Journal of Cereal Science 8, 261–268.
Effects of thermal-processing of wheat on starch 2. Enzymic availability.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL1MXhtFens7g%3D&md5=3f25101fa141e48128e57d75f4bbad34CAS |

Hoseney RC (1994) ‘Principles of cereal science and technology.’ 2nd edn. (American Association of Cereal Chemists: St Paul, MN)

Htoon A, Shrestha AK, Flanagan BM, Lopez-Rubio A, Bird AR, Gilbert EP, Gidley MJ (2009) Effects of processing high amylase maize starches under controlled conditions on structural organisation and amylase digestibility. Carbohydrate Polymers 75, 236–245.
Effects of processing high amylase maize starches under controlled conditions on structural organisation and amylase digestibility.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXhtlSmsbjN&md5=3dc27033b72d55e317b56dce193510eaCAS |

Hurrell RF (1984) Reactions of food proteins during processing and storage and their nutritional consequences. In ‘Developments in foods proteins 3’. (Ed. BJF Hudson) pp. 213–244. (Elsevier: London)

Hurrell RF, Finot RA (1985) Effect of food processing on protein digestibility and amino acid availability. In ‘Digestibility and amino acid availability in cereals and oilseeds’. (Eds JW Finley, DT Hopkins) pp. 233–258. (American Association of Cereal Chemists: St Paul, MN)

Inborr J, Bedford MR (1994) Stability of feed enzymes to steam pelleting during feed processing. Animal Feed Science and Technology 46, 179–196.
Stability of feed enzymes to steam pelleting during feed processing.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK2cXlsFKns78%3D&md5=b355bebbedf1fd7f5bc0f8231c873278CAS |

Ito T, Saito K, Sugawara M, Mochida K, Nakakuki T (1999) Effect of raw and heat-moisture-treated high-amylose corn starches on the process of digestion in the rat digestive tract. Journal of the Science of Food and Agriculture 79, 1203–1207.
Effect of raw and heat-moisture-treated high-amylose corn starches on the process of digestion in the rat digestive tract.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXksFOksbg%3D&md5=dd4200cca0129dbcafb30e9fde601d8dCAS |

Jacobs H, Delcour JA (1998) Review: hydrothermal modifications of granular starch, with retention of the granular structure. Journal of Agricultural and Food Chemistry 46, 2895–2905.
Review: hydrothermal modifications of granular starch, with retention of the granular structure.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1cXkslGqtrY%3D&md5=d601d3f1ec5633990f1a8378f054b418CAS |

Jones FT (2011) A review of practical Salmonella control measures in animal feed. Journal of Applied Poultry Research 20, 102–113.
A review of practical Salmonella control measures in animal feed.Crossref | GoogleScholarGoogle Scholar |

Kaliyan N, Morey RV (2010) Natural binders and solid bridge type binding mechanisms in briquettes and pellets made from corn stover and switchgrass. Bioresource Technology 101, 1082–1090.
Natural binders and solid bridge type binding mechanisms in briquettes and pellets made from corn stover and switchgrass.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXhtlWntr%2FM&md5=40102a930afd1f007675e8f43a0920f9CAS | 19796933PubMed |

Ker YC, Chen RH (1998) Shear-induced conformational changes and gelation of soy protein isolate suspensions. Food Science and Technology 31, 107–113.

Kishida T, Nogami H, Himeno S, Ebihara K (2001) Heat moisture treatment of high amylose cornstarch increases its resistant starch content but not its physiological effects in rats. Journal of Nutrition 131, 2716–2721.

Kitabatake N, Doi E (1992) Denaturation and texturization of food protein by extrusion cooking. In ‘Food extrusion science and technology’. (Eds JL Kokini, CT Ho, M Karwe) pp. 361–371. (Marcel Dekker: New York)

Liener IE (1994) Implications of antinutritional components in soybean foods. Critical Reviews in Food Science and Nutrition 37, 34–67.

Ljøkjel K, Sørensen M, Storebakken T, Skrede A (2004) Digestibility of protein, aminoacids and starch in mink (Mustela vison) fed diets processed by different extrusion conditions. Canadian Journal of Animal Science 84, 673–680.
Digestibility of protein, aminoacids and starch in mink (Mustela vison) fed diets processed by different extrusion conditions.Crossref | GoogleScholarGoogle Scholar |

Ludikhuyse L, Van Loey A, Indrawati SC, Hendrickx M (2003) Effects of combined pressure and temperature on enzymes related to quality of fruits and vegetables: from kinetic information to process engineering aspects. Critical Reviews in Food Science and Nutrition 43, 527–586.
Effects of combined pressure and temperature on enzymes related to quality of fruits and vegetables: from kinetic information to process engineering aspects.Crossref | GoogleScholarGoogle Scholar | 14653494PubMed |

Lund D (1984) Influence of time, temperature, moisture, ingredients and processing conditions on starch gelatinisation. CRC Critical Reviews in Food Science and Nutrition 20, 249–273.
Influence of time, temperature, moisture, ingredients and processing conditions on starch gelatinisation.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DyaL2M%2Fis1ajsw%3D%3D&md5=e620ed486eee4e87b16a8adb4aac460cCAS | 6386335PubMed |

Mani S, Sokhansanj S, Bi X, Turhollow A (2006) Economics of producing fuel pellets from biomass. Applied Engineering in Agriculture 22, 421–426.

Marchetti M, Tossani N, Marchetti S, Bauce G (1999) Stability of crystalline and coated vitamins during manufacture and storage of fish feeds. Aquaculture Nutrition 5, 115–120.
Stability of crystalline and coated vitamins during manufacture and storage of fish feeds.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXkt1ClsLw%3D&md5=ea53784b7fb1fab5347abf5a57d85b07CAS |

Marsman GJP, Gruppen H, Van der Poel AFB (1993) Effect of extrusion on the in vitro digestibility of toasted and untoasted soybean meal. In ‘Recent advances of research in antinutritional factors in legumes seeds’. (Eds AFB van der Poel, J Huisman, HS Saini) pp. 461–465. (Wageningen Press: Wageningen, The Netherlands)

Martins SIFS, Jongen WMF, Van Boekel MAJS (2001) A review of Maillard reaction in food and implications to kinetic modeling. Food Science and Technology 11, 364–373.
A review of Maillard reaction in food and implications to kinetic modeling.Crossref | GoogleScholarGoogle Scholar |

Mauron J (1990) Influence of processing on protein quality. Journal of Nutritional Science and Vitaminology 36, 57–69.

Medel P, Salado S, de Blas JC, Mateos GG (1999) Processed cereals in diets for early-weaned piglets. Animal Feed Science and Technology 82, 145–156.
Processed cereals in diets for early-weaned piglets.Crossref | GoogleScholarGoogle Scholar |

Molina E, Ledward DA (2003) Effects of combined high-pressure and heat treatment on the textural properties of soya gels. Food Chemistry 80, 367–370.
Effects of combined high-pressure and heat treatment on the textural properties of soya gels.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38Xps1Omsbk%3D&md5=8e68cc9e300abccdacc35a5d941faae3CAS |

Moran ET (1989) Effect of pellet quality on the performance of meat birds. In ‘Recent advances in animal nutrition’. (Eds W Haresign, DJA Cole) pp. 88–107. (Butterworths: London)

Moritz JS, Wilson KJ, Cramer KR, Beyer RS, McKinney LJ, Cavalcanti B, Mo X (2003) Effect of formulation density, moisture, and surfactant on feed manufacturing, pellet quality, and broiler performance. Journal of Applied Poultry Research 11, 155–163.

Moritz JS, Parsons AS, Buchanan NP, Calvalcanti WB, Cramer KR, Beyer RS (2005) Effect of gelatinizing dietary starch through feed processing on zero- to three-week broiler performance and metabolism. Journal of Applied Poultry Research 14, 47–54.

Mustakas GC, Albrecht WJ, Bookwalter GN, McGhee JE, Kwolek WF, Griffin EL (1970) Extruder processing to improve nutritional quality, flavor and keeping quality of full-fat soy flour. Food Technology 24, 1290–1296.

Nolan A, McDonnell K, Devlin GJ, Carroll JP, Finnan J (2010) Economic analysis of manufacturing costs of pellet production in the Republic of Ireland using non-woody biomass. Open Renewable Energy Journal 3, 1–11.
Economic analysis of manufacturing costs of pellet production in the Republic of Ireland using non-woody biomass.Crossref | GoogleScholarGoogle Scholar |

Papadopoulos MC (1989) Review: effect of processing on high-protein feedstuffs. Biological Wastes 29, 123–138.
Review: effect of processing on high-protein feedstuffs.Crossref | GoogleScholarGoogle Scholar |

Peres H, Oliva-Teles A (2002) Utilization of raw and gelatinized starch by European sea bass (Dicentrarchus labrax) juveniles. Aquaculture 205, 287–299.
Utilization of raw and gelatinized starch by European sea bass (Dicentrarchus labrax) juveniles.Crossref | GoogleScholarGoogle Scholar |

Pettersson D, Graham H, Åman P (1991) The nutritive value for broiler chickens of pelleting and enzyme supplementation of a diet containing barley, wheat and rye. Animal Feed Science and Technology 33, 1–14.
The nutritive value for broiler chickens of pelleting and enzyme supplementation of a diet containing barley, wheat and rye.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3MXmslyktL0%3D&md5=ab81548155aa136d93342d28bd860576CAS |

Pickford JR (1992) Effects of processing on the stability of heat labile nutrients in animal feeds. In ‘Recent advances in animal nutrition’. (Eds PC Garnsworthy, W Haresign, DJA Cole) pp. 177–192. (Redwood Press: Wiltshire, UK)

Pieniazek D, Rakowska M, Kunachowicz H (1975) Participation of methionine and cysteine in formation of bonds resistant to action of proteolytic-enzymes in heated casein. British Journal of Nutrition 34, 163–173.

Plavnik I, Sklan D (1995) Nutritional effects of expansion and short time extrusion on feeds for broilers. Animal Feed Science and Technology 55, 247–251.
Nutritional effects of expansion and short time extrusion on feeds for broilers.Crossref | GoogleScholarGoogle Scholar |

Prasad ER, Dutta-Gupta A, Padmasree K (2010) Purification and characterization of a Bowman–Birk proteinase inhibitor from the seeds of black gram (Vigna mungo). Phytochemistry 71, 363–372.
Purification and characterization of a Bowman–Birk proteinase inhibitor from the seeds of black gram (Vigna mungo).Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXitVOnu78%3D&md5=ccdbb0ea7764be7d9039e5e020e0559aCAS | 20018332PubMed |

Renkema JMS, Lakemond CMM, de Jongh HHJ, Gruppen H, Van Vliet T (2000) The effect of pH on heat denaturation and gel forming properties of soy proteins. Journal of Biotechnology 79, 223–230.
The effect of pH on heat denaturation and gel forming properties of soy proteins.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXktV2rtrw%3D&md5=5f44203682bfb3c60691c6f421ef23ceCAS | 10867183PubMed |

Rouilly A, Orliac O, Silvestre F, Rigal L (2003) Thermal denaturation of sunflower globulins in low moisture conditions. Thermochimica Acta 398, 195–201.
Thermal denaturation of sunflower globulins in low moisture conditions.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3sXhs1ajsLk%3D&md5=be0213089ccdf9b35b6cbaa9ea33aa45CAS |

Saito K, Ito T, Kuribayashi T, Mochida T, Nakakuki T, Shibata M, Sugawara M (2001) Effect of raw and heat-moisture treated high-amylose corn starch on fermentation by the rat cecal bacteria. Starch 53, 424–430.
Effect of raw and heat-moisture treated high-amylose corn starch on fermentation by the rat cecal bacteria.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3MXntFWjt7Y%3D&md5=517b2e61f3d29624bef3e9b6470db93bCAS |

Samarasinghe K, Messikommer R, Wenk C (2000) Activity of supplemental enzymes and their effect on nutrient utilization and growth performance of growing chickens as affected by pelleting temperature. Archives of Animal Nutrition 53, 45–58.
Activity of supplemental enzymes and their effect on nutrient utilization and growth performance of growing chickens as affected by pelleting temperature.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXktFGhu78%3D&md5=9fb578626f10644ae3d0d211246245e5CAS | 10836257PubMed |

Saunders RM (1975) α-amylase inhibitors in wheat and other cereals. Cereal Foods World 20, 282–285.

Schoeff RW (1994) History of the formula feed industry. In ‘Feed manufacturing technology IV’. (Ed. RR McEIIhiney) pp. 2–11. (American Feed Industry Association: Arlington, VA)

Seckinger HL, Wolf MJ (1970) Electron microscopy of endosperm protein from hard and soft wheats. Cereal Chemistry 47, 236–243.

Silversides FG, Bedford MR (1999) Effect of pelleting temperature on the recovery and efficacy of a xylanase enzyme in wheat-based diets. Poultry Science 78, 1184–1190.

Skoch ER, Binder SF, Deyoe CW, Allee GL, Behnke KC (1981) Effects of pelleting conditions on performance of pigs fed a corn-soybean meal diet. Journal of Animal Science 57, 922–928.

Skoch ER, Binder SF, Deyoe CW, Allee GL, Behnke KC (1983) Effects of steam pelleting conditions and extrusion cooking on a swine diet containing wheat middlings. Journal of Animal Science 57, 929–935.

Slominski BA, Davie T, Nyachoti MC, Jones O (2007) Heat stability of endogenous and microbial phytase during feed pelleting. Livestock Science 109, 244–246.
Heat stability of endogenous and microbial phytase during feed pelleting.Crossref | GoogleScholarGoogle Scholar |

Spring P, Newman KE, Wenk C, Messikommer R, Vukic Vranjes M (1996) Effect of pelleting on the activity of different enzymes. Poultry Science 75, 357–361.

Stanley DW (1989) Protein reaction during extrusion processing. In ‘Extrusion cooking’. (Eds C Mercier, P Linko, JM Harper) pp. 321–341. (American Association of Cereal Chemists: St Paul, MN)

Stevens CA (1987) Starch gelatinization and the influence of particle size, steam pressure and die speed on the pelleting process. PhD Dissertation, Kansas State University, Manhattan, KS.

Sun Z, Yang W, Siebenmorgen T, Stelwagen A, Cnossen A (2002) Thermo mechanical transitions of rice kernels. Cereal Chemistry 79, 349–353.
Thermo mechanical transitions of rice kernels.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XjvFCntbw%3D&md5=776455f309f22510522ff61da6f2ef6cCAS |

Svihus B (2011) Limitations to wheat starch digestion in growing broiler chickens: a brief review. Animal Production Science 51, 583–589.
Limitations to wheat starch digestion in growing broiler chickens: a brief review.Crossref | GoogleScholarGoogle Scholar |

Svihus B, Kløvstad KH, Perez V, Zimonja O, Sahlström S, Schüller RB, Jeksrud WK, Prestløkken E (2004) Nutritional effects of pelleting of broiler chicken diets made from wheat ground to different coarsenesses by the use of roller mill and hammer mill. Animal Feed Science and Technology 117, 281–293.
Nutritional effects of pelleting of broiler chicken diets made from wheat ground to different coarsenesses by the use of roller mill and hammer mill.Crossref | GoogleScholarGoogle Scholar |

Svihus B, Uhlen AK, Harstad OM (2005) Effect of starch granule structure, associated components and processing on nutritive value of cereal starch: a review. Animal Feed Science and Technology 122, 303–320.
Effect of starch granule structure, associated components and processing on nutritive value of cereal starch: a review.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXmvVGisb4%3D&md5=4e11660c6ef1d3db56b8cbce320a149cCAS |

Thomas M, Van der Poel AFB (1996) Physical quality of pelleted animal feed. 1. Criteria for pellet quality. Animal Feed Science and Technology 61, 89–112.
Physical quality of pelleted animal feed. 1. Criteria for pellet quality.Crossref | GoogleScholarGoogle Scholar |

Timmons JR, Angel R, Harter-Dennis JM, Saylor WW, Ward NE (2008) Evaluation of heat-stable phytases in pelleted diets fed to broilers from day zero to thirty-five during the summer months. Journal of Applied Poultry Research 17, 482–489.
Evaluation of heat-stable phytases in pelleted diets fed to broilers from day zero to thirty-five during the summer months.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXivFWrsQ%3D%3D&md5=32f6520ae8d045a3975929cae1cc8d20CAS |

Vahjen W, Simon O (1999) Biochemical characteristics of non starch polysaccharide hydrolyzing enzyme preparations designed as feed additives for poultry and piglet nutrition. Archives of Animal Nutrition 52, 1–14.
Biochemical characteristics of non starch polysaccharide hydrolyzing enzyme preparations designed as feed additives for poultry and piglet nutrition.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXjvFaiu7w%3D&md5=6c404daaebd93725f5d56035260f52f5CAS | 10548972PubMed |

Vande Ginste J, De Schrijver R (1998) Expansion and pelleting of starter, grower and finisher diets for pigs: effects on nitrogen retention, ileal and total tract digestibility of protein, phosphorus and calcium and in vitro protein quality. Animal Feed Science and Technology 72, 303–314.
Expansion and pelleting of starter, grower and finisher diets for pigs: effects on nitrogen retention, ileal and total tract digestibility of protein, phosphorus and calcium and in vitro protein quality.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1cXjvVWgsbw%3D&md5=0eef4758039416494fd3de5c8132c1e0CAS |

Vranjes MV, Wenk C (1995) The influence of extruded vs. untreated barley in the feed, with and without dietary enzyme supplement on broiler performance. Animal Feed Science and Technology 54, 21–32.
The influence of extruded vs. untreated barley in the feed, with and without dietary enzyme supplement on broiler performance.Crossref | GoogleScholarGoogle Scholar |

Weijers SR, van’t Riet K (1992) Enzyme stability in downstream processing. Part 1: enzyme inactivation, stability and stabilization. Biotechnology Advances 10, 237–249.
Enzyme stability in downstream processing. Part 1: enzyme inactivation, stability and stabilization.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK38Xls1Kht7w%3D&md5=592934277a48a6b5d70cdb924522afc4CAS | 14544535PubMed |

Wood JF (1987) The functional properties of feed raw materials and their effect on the production and quality of feed pellets. Animal Feed Science and Technology 18, 1–17.
The functional properties of feed raw materials and their effect on the production and quality of feed pellets.Crossref | GoogleScholarGoogle Scholar |

Zarkadas LN, Wiseman J (2005) Influence of processing of full fat soya beans included in diets for piglets. I. performance. Animal Feed Science and Technology 118, 109–119.
Influence of processing of full fat soya beans included in diets for piglets. I. performance.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2cXhtVyrt7%2FN&md5=7dae1e6e760427444e18b27dfd880af2CAS |

Zeleznak KJ, Hoseney RC (1986) The role of water in the retrogradation of wheat-starch gels and bread crumb. Cereal Chemistry 63, 407–411.

Zhang G, Ao Z, Hamaker BR (2006a) Slow digestion property of native cereal starches. Biomacromolecules 7, 3252–3258.
Slow digestion property of native cereal starches.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD28XhtFWju73K&md5=7e273f9011d79680dadf527747de5899CAS | 17096558PubMed |

Zhang G, Venkatachalam M, Hamaker BR (2006b) Structural basis for the slow digestion property of native cereal starches. Biomacromolecules 7, 3259–3266.
Structural basis for the slow digestion property of native cereal starches.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD28XhtFais7jF&md5=8fbca2504b78c003bbec42b1a2dde1efCAS | 17096559PubMed |

Zimonja O, Svihus B (2009) Effects of processing of wheat or oat starch on technical pellet quality and nutritional value for broilers. Animal Feed Science and Technology 149, 287–297.
Effects of processing of wheat or oat starch on technical pellet quality and nutritional value for broilers.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXisVOks74%3D&md5=382d9055a3c03213113a2cc184eecc44CAS |

Zimonja O, Stevnebø A, Svihus B (2007) Nutritional value of diets for broiler chickens as affected by fat source, amylose level and diet processing. Canadian Journal of Animal Science 87, 553–562.
Nutritional value of diets for broiler chickens as affected by fat source, amylose level and diet processing.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXivFyqsbY%3D&md5=d6286561d7c5192877bafe2adb706321CAS |

Zimonja O, Hetland H, Lazarevic N, Edvardsen DH, Svihus B (2008) Effects of fibre content in pelleted wheat and oats diets on technical pellet quality and nutritional value for broiler chickens. Canadian Journal of Animal Science 88, 613–622.
Effects of fibre content in pelleted wheat and oats diets on technical pellet quality and nutritional value for broiler chickens.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXjtVyht7s%3D&md5=8d35f95974b3f0886d84ca7905a5df96CAS |