Akin, D. E. 1980. Evaluation by electron microscopy and anaerobic culture of types of rumen bacteria associated with digestion of forage cell walls. Appl. Environ. Microbiol. 39:242-252.
Chaney, A. L. and E. P. Marbach. 1962. Modified reagents for determination of urea and ammonia. Clin. Chem. 8:130-132.
Demain, A. L. and J. Birnbaum. 1968. Alternation of permeability for the release of metabolites from microbial cells. Curr. Topics Microbiol. Immun. 46:1-25.
Deshpande, M. V., M. C. Srinavasan and S. S. Deshmakh. 1987. Effects of fatty acids on cellulase production by Penicillium funiculosum and its mutants. Biotechnol. Lett. 9:301-304.
Erwin, E. S., J. Marco and E. M. Emery. 1961. Volatile fatty acid analysis of blood and rumen fluid by gas chromatography. J. Dairy Sci. 44:1768-1779.
Helle, S. S., S. J. B. Duff and D. J. Cooper. 1993. Effect of surfactants on cellulose hydrolysis. Biotechnol. Bioengineer. 42:611-617.
Hulme, M. A. and D. W. Stranks. 1970. Induction and their regulation of production of cellulase by fungi. Nature, London. 226:469-470.
Hung, B. R., L. Lara, M. A. Patron, N. N. Ugarova, W. Bechstedt and S. Clappes. 1988. Tween 80 and proteose peptone effect on cellulase production. Acta Biotechnol. 8:461-464.
Lee, S. S. and J. K. Ha. 2003. Influences of surfactant Tween 80 on the gas production, cellulose digestion and enzyme activities by mixed rumen microorganisms. Asian-Aust. J. Anim. Sci. 16:1151-1157.
Lee, S. S., B. H. Ahn, H. S. Kim, C. H. Kim, K.-J. Cheng and J. K. Ha. 2003. Effects of non-ionic surfactants on enzyme distributions of rumen contents, anaerobic growth of rumen microbes, rumen fermentation characteristics and performances of lactating cows. Asian-Aust. J. Anim. Sci. 16:104-115.
Long, K. and J. S. Knapp. 1991. The effect of Junlon PW110 and Tween 80 on the production of cellulolytic enzymes by Coprinus cinereus. Mycol. Res. 95:1077-1081.
McAllister, T. A., K. Stanford, H. D. Bae, R. Treacher, J. Baah, J. Shelford and K.-J. Cheng. 2000. Effect of a surfactant and exogenous enzymes on digestibility, growth performance and carcass traits of lambs. Can. J. Anim. Sci. 80:35-44.
Miller, G. L. 1959. Use of dinitrosalysilic acid reagent for dtermination of reducing sugar. Analytical Chemistry. 31:426-428.
Murphy, M. 1989. The influence of non-structural carbohydrates on rumen microbes and rumen metabolism in milk producing cows. Ph. D. thesis, Swedish University of Agricultural Sciences, Uppsala. Sweden.
Nolan, J. V. and R. A. Leng. 1972. Dynamic aspects of ammonia and urea metabolism in sheep. Br. J. Nutr. 27:177-194.
Park, J. W., Y. Takahata, T. Kajiuchi and T. Akehata. 1992. Effects of nonionic surfactant on enzymatic hydrolysis of used newpaper. Biotechnol. Bioengineer. 39:117-120.
Reese, E. T. and A. Maguire. 1969. Surfactants as stimulants of enzyme production by microorganisms. Applied Microbiol. 17:242-245.
SAS. 1996. Statistical analysis system user’s guide: Statistics. SAS Institute. Inc., Cary, NC. USA.
Satter, L. D. and L. L. Slyter. 1974. Effect of ammonia concentration on rumen microbial protein production in vitro. Br. J. Nutr. 32:199-208.
Schelford, J. A., K.-J. Cheng and G. M. Kamande. 1996. Enzyme enhancers: the key to unlocking the energy from feed. In: Advances in Dairy Technology. Western Canada Dairy Seminar, University of Alberta, Edmonton, AB, Canada. 8:269-275.
Schewale, J. G. and J. C. Sadana. 1978. Cellulase and glucosidase production by basidiomycetes spcies. Can. J. Microbiol. 24:1204-1216.
Tamminga, S. 1979. Protein degradation in the forestomachs of ruminants. J. Anim. Sci. 49:1615-1630.
Terry, R. A., J. M. Tilley and G. A. Outen. 1969. Effect of pH on cellulose digestion under in vitro conditions. J. Sci. Food Agric. 20:317-320.
Van Soest, P. J. 1963. Use of detergents in the analysis of fibrous feeds. 2. A rapid method for the determination of fiber and lignin. J. AOAC. 46:829-835.
Van Soest, P. J. and R. H. Wine. 1967. Use of detergents in the analysis of fibrous feeds. 4. Determination of plant cell-wall constituents. J. AOAC. 50:50-55.
Wang, Y., T. A. McAllister, J. Baah, R. Wilde, K. A. Bequchemin, L. M. Rode, J. A. Shelford, G. M. Kamande and K.-J. Cheng. 2003. Effects of Tween 80 on in vitro fermentation of silages and interactive effects of Tween 80, monensin and exogenous fibrolytic enzymes on growth performance by feedlot cattle. Asian-Aust. J. Anim. Sci. 16:968-978.
Wilson, J. R. and P. M. Kennedy. 1996. Plant animal constraints to voluntary feed intake associated with fiber characteristics and particle breakdown and passage in ruminants. Aust. J. Agric. Res. 47:199-225.
Yazdi, M. T., J. R. Woodward and A. Radford. 1990. The cellulase complex of Neurospora crassa: activity, stability and release. J. Gen. Microbiol. 136:1313-1319.