AFSHARMANESH, M. and POURREZA, J. (2005) Effects of calcium, citric acid, ascorbic acid, vitamin d3 on the efficacy of microbial phytase in broiler starters fed wheat-based diets. I. performance, bone mineralisation and ileal digestibility. International Journal of Poultry Science 4: 418-424.
AKYUREK, H., OZDUVEN, M.L., OKUR, A.A., KOC, F. and SAMLI, H.E. (2011) The effects of supplementing an organic acid blend and/or microbial phytase to a corn-soybean based diet fed to broiler chickens. African Journal of Agricultural Research 6: 642-649.
BIGGS, P. and PARSONS, C.M. (2008) The effects of several organic acids on growth performance, nutrient digestibilities, and cecal microbial populations in young chicks. Poultry Science 87: 2581-2589.
BOLING, S.D., WEBEL, D.M., MAVROMICHALIS, I., PARSONS, C.M. and BAKER, D.H. (2000) The effects of citric acid on phytate-phosphorus utilisation in young chicks and pigs. Journal of Animal Science 78: 682-689.
BOLING-FRANKENBACH, S.D., SNOW, J.L., PARSONS, C.M. and BAKER, D.H. (2001) The effect of citric acid on the calcium and phosphorus requirements of chicks fed corn-soybean meal diets. Poultry Science 80: 783-788.
BRENES, A., VIVEROS, A., ARIJA, I., CENTENO, C., PIZARRO, M. and BRAVO, C. (2003) The effect of citric acid and microbial phytase on mineral utilisation in broiler chicks. Animal Feed Science and Technology 110: 201-219.
CENTENO, C., ARIJA, I., VIVEROS, A. and BRENES, A. (2007) Effects of citric acid and microbial phytase on amino acid digestibility in broiler chickens. British Poultry Science 48: 469-479.
CHERYAN, M. and RACKIS, J.J. (1980) Phytic acid interactions in food systems. C R C Critical Reviews in Food Science and Nutrition 13: 297-335.
CHOWDHURY, R., ISLAM, K.M.S., KHAN, M.J., KARIM, M.R., HAQUE, M.N., KHATUN, M. and PESTI, G.M. (2009) Effect of citric acid, avilamycin, and their combination on the performance, tibia ash, and immune status of broilers. Poultry Science 88: 1616-1622.
COWIESON, A.J., RUCKEBUSCH, J.P., KNAP, I., GUGGENBUHL, P. and FRU-NJI, F. (2016) Phytate-free nutrition: a new paradigm in monogastric animal production. Animal Feed Science and Technology 222: 180-189.
DEMIREL, G., PEKEL, A.Y., ALP, M. and KOCABAGLI, N. (2012) Effects of dietary supplementation of citric acid, copper, and microbial phytase on growth performance and mineral retention in broiler chickens fed a low available phosphorus diet. Journal of Applied Poultry Research 21: 335-347.
DENBOW, D.M. (2015) Gastrointestinal anatomy and physiology, Sturkie's Avian Physiology, pp. 337-366. Sixth edition. (Elsevier).
DERSJANT-LI, Y., AWATI, A., SCHULZE, H. and PARTRIDGE, G. (2015) Phytase in non-ruminant animal nutrition: a critical review on phytase activities in the gastrointestinal tract and influencing factors. Journal of the Science of Food and Agriculture 95: 878-896.
DESHPANDE, S.S. and CHERYAN, M. (1984) Effects of phytic acid, divalent cations, and their interactions on α-amylase activity. Journal of Food Science 49: 516-519.
EBRAHIMNEZHAD, Y., SHIVAZAD, M., TAHERKHANI, R. and NAZERADL, K. (2008) Effects of citric acid and microbial phytase supplementation on performance and phytate phosphorus utilisation in broiler chicks. The Journal of Poultry Science 45: 20-24.
EISENBERG, F. and PARTHASARATHY, R. (1987) Measurement of biosynthesis of myo-inositol from glucose 6-phosphate, Methods in Enzymology, Vol. 141, pp. 127-143 (Academic Press).
EMAMI, N.K., NAEINI, S.Z. and RUIZ-FERIA, C.A. (2013) Growth performance, digestibility, immune response and intestinal morphology of male broilers fed phosphorus deficient diets supplemented with microbial phytase and organic acids. Livestock Science 157: 506-513.
EMSLEY, J. and NIAZI, S. (1981) The structure of myo-inositol hexaphosphate in solution: 31P N.M.R. investigation. Phosphorus and Sulfur and the Related Elements 10: 401-407.
ESMAEILIPOUR, O., SHIVAZAD, M., MORAVEJ, H., AMINZADEH, S., REZAIAN, M. and VAN KRIMPEN, M.M. (2011) Effects of xylanase and citric acid on the performance, nutrient retention, and characteristics of gastrointestinal tract of broilers fed low-phosphorus wheat-based diets. Poultry Science 90: 1975-1982.
GHANAATPARAST-RASHTI, M., SHARIATMADARI, F., KARIMITORSHIZI, M.A. and MOHITI-ASLI, M. (2016) Effects of dietary propionic acid, sodium citrate, and phytase on growth performance, mineral digestibility, and tibia properties in broilers. Journal of Applied Animal Research 44: 370-375.
GRASES, F., SIMONET, B.M., MARCH, J.G. and PRIETO, R.M. (2000) Inositol hexakisphosphate in urine: the relationship between oral intake and urinary excretion. BJU International 85: 138-142.
GRASES, F., SIMONET, B.M., VUCENIK, I., PRIETO, R.M., COSTA-BAUZÁ, A., MARCH, J.G. and SHAMSUDDIN, A.M. (2001) Absorption and excretion of orally administered inositol hexaphosphate (IP6 or phytate) in humans. BioFactors 15: 53-61.
GREINER, R. and KONIETZNY, U. (2012) Update on characteristics of commercial phytases, in: International Phytase Summit. Rome, pp. 96-107.
HARIHARAN, T. and GANGADEVI, P. (2015) Efficacy of citric acid and microbial phytase on the tibial characteristics, tibial and serum mineral concentrations in broiler chicken. Indian Journal of Animal Research 49: 328-332.
HUMER, E., SCHWARZ, C. and SCHEDLE, K. (2015) Phytate in pig and poultry nutrition. Journal of Animal Physiology and Animal Nutrition 99: 605-625.
HUTA, B., LENSBOEUR, J.J., LOWE, A.J., ZUBIETA, J. and DOYLE, R.P. (2012) Metal-citrate complex uptake and CitMHS transporters: From coordination chemistry to possible vaccine development. Inorganica Chimica Acta 393: 125-134.
JAIN, J., SAPNA and SINGH, B. (2016) Characteristics and biotechnological applications of bacterial phytases. Process Biochemistry 51: 159-169.
KHAN, S.H. and IQBAL, J. (2016) Recent advances in the role of organic acids in poultry nutrition. Journal of Applied Animal Research 44: 359-369.
LEI, X.G., WEAVER, J.D., MULLANEY, E., ULLAH, A.H. and AZAIN, M.J. (2013) Phytase, a new life for an “old” enzyme. Annual Review of Animal Biosciences 1: 283-309.
LIEM, A., PESTI, G.M. and EDWARDS, H.M. (2008) The effect of several organic acids on phytate phosphorus hydrolysis in broiler chicks. Poultry Science 87: 689-693.
MAENZ, D.D., ENGELE-SCHAAN, C.M., NEWKIRK, R.W. and CLASSEN, H.L. (1999) The effect of minerals and mineral chelators on the formation of phytase-resistant and phytase-susceptible forms of phytic acid in solution and in a slurry of canola meal. Animal Feed Science and Technology 81: 177-192.
MATTEY, M. (1992) The production of organic acids. Critical Reviews in Biotechnology 12: 87-132.
MENEZES-BLACKBURN, D., GABLER, S. and GREINER, R. (2015) Performance of seven commercial phytases in an in vitro simulation of poultry digestive tract. Journal of Agricultural and Food Chemistry 63: 6142-6149.
MILEWSKA, M.J. (1988) Citric acid - its natural and synthetic derivatives. Zeitschrift für Chemie 28: 204-211.
MULLANEY, E.J. and ULLAH, A.H.J. (2003) The term phytase comprises several different classes of enzymes. Biochemical and Biophysical Research Communications 312: 179-184.
NOURMOHAMMADI, R., HOSSEINI, S.M., FARHANGFAR, H. and BASHTANI, M. (2012) Effect of citric acid and microbial phytase enzyme on ileal digestibility of some nutrients in broiler chicks fed corn-soybean meal diets. Italian Journal of Animal Science 11: e7.
ONYANGO, E.M., BEDFORD, M.R. and ADEOLA, O. (2005) Phytase activity along the digestive tract of the broiler chick: a comparative study of an Escherichia coli-derived and Peniophora lycii phytase. Canadian Journal of Animal Science 85: 61-68.
PARTANEN, K.H. and MROZ, Z. (1999) Organic acids for performance enhancement in pig diets. Nutrition Research Reviews 12: 117-145.
PINCKNEY, J.L., PAERL, H.W., TESTER, P. and RICHARDSON, T.L. (2001) The role of nutrient loading and eutrophication in estuarine ecology. Environmental Health Perspectives 109: 699-706.
RAFACZ-LIVINGSTON, K.A., MARTINEZ-AMEZCUA, C., PARSONS, C.M., BAKER, D.H. and SNOW, J. (2005a) Citric acid improves phytate phosphorus utilisation in crossbred and commercial broiler chicks. Poultry Science 84: 1370-1375.
RAFACZ-LIVINGSTON, K.A., PARSONS, C.M. and JUNGK, R.A. (2005b) The effects of various organic acids on phytate phosphorus utilisation in chicks. Poultry Science 84: 1356-1362.
RAVINDRAN, V. and SON, J. (2011) Feed enzyme technology: present status and future developments. Recent Patents on Food, Nutrition & Agriculture 3: 102-109.
SELLE, P.H., COWIESON, A.J., COWIESON, N.P. and RAVINDRAN, V. (2012) Protein-phytate interactions in pig and poultry nutrition: a reappraisal. Nutrition Research Reviews 25: 1-17.
SINGH, M. and KRIKORIAN, A.D. (1982) Inhibition of trypsin activity in vitro by phytate. Journal of Agricultural and Food Chemistry 30: 799-800.
SLOMINSKI, B.A. (2011) Recent advances in research on enzymes for poultry diets. Poultry Science 90: 2013-2023.
SNOW, J.L., BAKER, D.H. and PARSONS, C.M. (2004) Phytase, citric acid, and 1α-hydroxycholecalciferol improve phytate phosphorus utilisation in chicks fed a corn-soybean meal diet. Poultry Science 83: 1187-1192.
SUIRYANRAYNA, M.V.A.N. and RAMANA, J.V. (2015) A review of the effects of dietary organic acids fed to swine. Journal of Animal Science and Biotechnology 6: 45-55.
SUZUKI, U., YOSHIMURA, K. and TAKAISHI, M. (1907) About the enzyme “phytase”, which splits anhydro-oxy-methylene diphosphoric acid. Bulletin of the College of Agriculture, Tokyo Imperial University 1: 503-512.
TAHERI, H.R., ADIBNIA, S., JABBARI, Z., SHAHIR, M.H. and HOSSEINI, S.A. (2015) Effect of high-dose phytase and citric acid, alone or in combination, on growth performance of broilers given diets severely limited in available phosphorus. British Poultry Science 56: 708-715.
TAMIM, N.M., ANGEL, R. and CHRISTMAN, M. (2004) Influence of dietary calcium and phytase on phytate phosphorus hydrolysis in broiler chickens. Poultry Science 83: 1358-1367.
TAZISONG, I.A., SENWO, Z.N. and HE, Z. (2015) Phosphatase hydrolysis of organic phosphorus compounds. Advances in Enzyme Research 03: 39-51.
THORNE, M., THOMPSON, L. and JENKINS, D. (1983) Factors affecting starch digestibility and the glycemic response with special reference to legumes. The American Journal of Clinical Nutrition 38: 481-488.
VAN DER AAR, P.J., MOLIST, F. and VAN DER KLIS, J.D. (2017) The central role of intestinal health on the effect of feed additives on feed intake in swine and poultry. Animal Feed Science and Technology 233: 64-75.
VATS, P. and BANERJEE, U.C. (2004) Production studies and catalytic properties of phytases (myo-inositolhexakisphosphate phosphohydrolases): an overview. Enzyme and Microbial Technology 35: 3-14.
VIEIRA, B.S., SILVA, F.G., OLIVEIRA, C.F.S., CORREA, A.B., CARAMORI, J.G. (Jr) and CORREA, G.S.S. (2017) Does citric acid improve performance and bone mineralisation of broilers when combined with phytase? A systematic review and meta-analysis. Animal Feed Science and Technology 232: 21-30.
WILKINSON, S.J., WALK, C.L., BEDFORD, M.R. and COWIESON, A.J. (2013) Influence of conditioning temperature on the postpellet recovery and efficacy os 2 microbial phytases for broiler chicks. Journal of Applied Poultry Research 22: 308-313.
WILKINSON, S.J., SELLE, P.H., BEDFORD, M.R. and COWIESON, A.J. (2014) Separate feeding of calcium improves performance and ileal nutrient digestibility in broiler chicks. Animal Production Science 54: 172-178.
WOYENGO, T.A., SLOMINSKI, B.A. and JONES, R.O. (2010) Growth performance and nutrient utilisation of broiler chickens fed diets supplemented with phytase alone or in combination with citric acid and multicarbohydrase. Poultry Science 89: 2221-2229.
YIN, X., LI, J., SHIN, H., DU, G., LIU, L. and CHEN, J. (2015) Metabolic engineering in the biotechnological production of organic acids in the tricarboxylic acid cycle of microorganisms: advances and prospects. Biotechnology Advances 33: 830-841.
ZHITNITSKY, D., ROSE, J. and LEWINSON, O. (2017) The highly synergistic, broad spectrum, antibacterial activity of organic acids and transition metals. Scientific Reports 7: 44554.
ZYLA, K., LEDOUX, D.R. and VEUM, T.L. (1995) Complete enzymic dephosphorylation of corn-soybean meal feed under simulated intestinal conditions of the turkey. Journal of Agricultural and Food Chemistry 43: 288-294.