Search Results - "Weimer, P.J."

Host specificity of the ruminal bacterial community in the dairy cow following near-total exchange of ruminal contents by Weimer, P J, Stevenson, D M, Mantovani, H C, Man, S L C

“…The purpose of this study was to examine the stability and host specificity of a cow's ruminal bacterial community following massive challenge with ruminal…”
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Comparative study of SPORL and dilute-acid pretreatments of spruce for cellulosic ethanol production by Shuai, L., Yang, Q., Zhu, J.Y., Lu, F.C., Weimer, P.J., Ralph, J., Pan, X.J.

“…The performance of two pretreatment methods, sulfite pretreatment to overcome recalcitrance of lignocellulose (SPORL) and dilute acid (DA), was compared in…”
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Divergent utilization patterns of grass fructan, inulin, and other nonfiber carbohydrates by ruminal microbes by Hall, M B, Weimer, P J

“…Fructans are an important nonfiber carbohydrate in cool season grasses. Their fermentation by ruminal microbes is not well described, though such information…”
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Shifts in bacterial community composition in the rumen of lactating dairy cows under milk fat-depressing conditions by Weimer, P J, Stevenson, D M, Mertens, D R

“…Eighteen ruminally cannulated dairy cattle were fed a series of diets (in 28-d periods) designed to elicit different degrees of milk fat depression (MFD) for…”
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pH dynamics and bacterial community composition in the rumen of lactating dairy cows by Palmonari, A, Stevenson, D M, Mertens, D R, Cruywagen, C W, Weimer, P J

“…The influence of pH dynamics on ruminal bacterial community composition was studied in 8 ruminally cannulated Holstein cows fitted with indwelling electrodes…”
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Individual animal variability in ruminal bacterial communities and ruminal acidosis in primiparous Holstein cows during the periparturient period by Mohammed, R, Stevenson, D M, Weimer, P J, Penner, G B, Beauchemin, K A

“…The purpose of this study was to investigate variability among individual cows in their severity of ruminal acidosis (RA) pre- and postpartum, and determine…”
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Changes in ruminal bacterial community composition following feeding of alfalfa ensiled with a lactic acid bacterial inoculant by Mohammed, R, Stevenson, D M, Beauchemin, K A, Muck, R E, Weimer, P J

“…Some silage inoculants help to improve silage quality and promote an increase in milk production, possibly through altering the rumen microflora. We…”
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Unique interrelationships between fiber composition, water-soluble carbohydrates, and in vitro gas production for fall-grown oat forages by Coblentz, W K, Nellis, S E, Hoffman, P C, Hall, M B, Weimer, P J, Esser, N M, Bertram, M G

“…Sixty samples of 'ForagePlus' oat were selected from a previous plot study for analysis of in vitro gas production (IVGP) on the basis of 2 factors: (1) high…”
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survival of silage inoculant lactic acid bacteria in rumen fluid by Weinberg, Z.G, Muck, R.E, Weimer, P.J

“…Aims: To determine whether lactic acid bacteria (LAB) used in inoculants for silage can survive in rumen fluid (RF), and to identify those that survive best…”
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Initial pH as a determinant of cellulose digestion rate by mixed ruminal microorganisms in vitro by Mouriño, F, Akkarawongsa, R, Weimer, P J

“…In vitro fermentations of pure cellulose by mixed ruminal microorganisms were conducted under conditions in which pH declined within ranges similar to those…”
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Effect of diet on populations of three species of ruminal cellulolytic bacteria in lactating dairy cows by Weimer, P J, Waghorn, G C, Odt, C L, Mertens, D R

“…The effects of four contrasting diets were determined on populations of three species of ruminal cellulolytic bacteria (Ruminococcus albus, Ruminococcus…”
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Symposium review: Host-rumen microbe interactions may be leveraged to improve the productivity of dairy cows by Bickhart, D M, Weimer, P J

“…The rumen is a large bioreactor that enables dairy cattle to derive nutrition from otherwise indigestible plant polymers and compounds. Despite the direct…”
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Quantitative analysis of growth and volatile fatty acid production by the anaerobic ruminal bacterium Megasphaera elsdenii T81 by Weimer, P. J., Moen, G. N.

“…Megasphaera elsdenii T81 grew on either dl -lactate or d -glucose at similar rates (0.85 h −1 ) but displayed major differences in the fermentation of these…”
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Photocatalytic Interaction of Resazurin N -Oxide with Cysteine Optimizes Preparation of Anaerobic Culture Media by Fukushima, R.S., Weimer, P.J., Kunz, D.A.

“…For the growth of several strictly anaerobic microorganisms, cysteine is the preferred reducing agent because of its low toxicity, but cysteine reduces media…”
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Effects of ruminal dosing of Holstein cows with Megasphaera elsdenii on milk fat production, ruminal chemistry, and bacterial strain persistence by Weimer, P J, Da Silva Cabral, L, Cacite, F

“…Megasphaera elsdenii is a lactate-utilizing bacterium whose ruminal abundance has been shown to be greatly elevated during milk fat depression (MFD). To…”
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Microbial cellulose utilization: fundamentals and biotechnology by Lynd, L.R, Weimer, P.J, Van Zyl, W.H, Pretorius, I.S

“…Fundamental features of microbial cellulose utilization are examined at successively higher levels of aggregation encompassing the structure and composition of…”
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Biomass Yield and Biofuel Quality of Switchgrass Harvested in Fall or Spring by Adler, P.R, Sanderson, M.A, Boateng, A.A, Weimer, P.J, Jung, H.J.G

“…Seasonal time of switchgrass (Panicum virgatum L.) harvest affects yield and biofuel quality and balancing these two components may vary depending on…”
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Fermentation of alfalfa wet-fractionation liquids to volatile fatty acids by Streptococcus bovis and Megasphaera elsdenii by Weimer, P.J., Digman, M.F.

“…•Alfalfa juice is rich in sugars, starch and a recoverable protein fraction.•Streptococcus bovis enhanced fermentation of alfalfa juice to lactic…”
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Degradation of lucerne stem cell walls by five rumen bacterial species by Jung, H.G., Engels, F.M., Weimer, P.J.

“…The rumen bacterial strains Butyrivibrio fibrisolvens H17c, Fibrobacter succinogenes S85, Lachnospira multiparas 40, Ruminococcus albus 7 and R. flavefaciens…”
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In vitro ruminal fermentation of treated alfalfa silage using ruminal inocula from high and low feed‐efficient lactating cows by Contreras‐Govea, F.E., Muck, R.E., Weimer, P.J., Hymes‐Fecht, U.C.

“…Aims To assess the effect of two additives on alfalfa silage and on in vitro ruminal fermentation when using ruminal inocula from high feed‐efficient (HE) and…”
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