Studies on conditions necessary for Bovine herpesvirus 1 reactivation

in Pastoret, Paul-Pierre; Thiry, Etienne; Saliki, J. (Eds.) Immunity to herpesvirus infections of domestic animals (1985)

Studies on ghosting, an important source of error in the quantitative estimation of free volatile fatty acids by GLC. 2. Effect of sample VFA concentration on ghosting magnitude and effectiveness of remedies to limit ghosting

in Journal of Chromatographic Science (1974), 12

Studies on the Biosynthesis of Bacillomycin homologous compounds by Bacillus subilis NT02

Poster (2001, May)

Studies On The In-Situ Nitrogen Degradability Corrected For Bacterial-Contamination Of Concentrate Feeds In Steers

in Journal of Animal Science (1995), 73(1), 220-227

Stable 15N was used to evaluate the influence of bacterial contamination on in situ DM and N degradabilities (Dg) of meat and bone meal (MBM), soybean meal (SBM), and wheat bran (WB) in two steers ... [more ▼]

Stable 15N was used to evaluate the influence of bacterial contamination on in situ DM and N degradabilities (Dg) of meat and bone meal (MBM), soybean meal (SBM), and wheat bran (WB) in two steers. Bacterial DM and N contamination ranged from 2.4 to 28.6% and 2.1 to 56.8% of residual DM and N, respectively. Effective N degradability increased when bacterial contamination was taken into account ( P < .05). The difference was low for MBM (2.4%) and for SBM (3.4%) but high for WB (12.2%). Theoretically, using solid-associated bacteria should give the most accurate correction for bacterial contamination; however, results showed that Dg of N based on liquid-associated bacteria were identical for MBM and SBM ( P > .05) and different for WB ( P .05). In a second experiment, five treatments were applied to incubated feeds to remove bacteria fxed to the residues and consequently to determine directly the Dg of DM and N corrected for the bacterial contamination without the need for a marker. These treatments involved chilling for 6 h at 4°C in saline solution alone ( T l ) or with a commercial detergent (T2), or with sodium dodecyl sulfate (T3) or with methylcellulose (T4), followed by pummeling in a stomacher for 5 min. The last treatment was only machine washing twice (T5). The Dg of DM can be directly determined following the first four treatments, nevertheless their application to MBM and SBM led to higher Dg of N than that corrected for the bacterial contamination determined in the frst experiment ( P < .05). This overestimation was higher than the observed underestimation when the correction for bacterial contamination was omitted. However, two treatments (T1 and T4) were able to dislodge bacterial N fixed to incubated WB and so the Dg of N could be measured directly. In conclusion, bacterial contamination of concentrate feeds incubated in the rumen may be extensive. In this case Dg must be corrected for this contamination or treatments for decontamination can be applied to residues before determining the Dg of N. [less ▲]

Studies on the Interaction of a Novel 6,6¿¿- bis(1,2,4-triazin-3-yl)-,2¿:6¿,2¿¿-terpyridine Ligand with Lanthanide(III) Ions and Americium(III)

Conference (2010, April 01)

Studies on the primary structures of the exocellular D-Alanyl-D-Alanine peptidases of Streptomyces strain R61 and Actinomadura strain R39

in Biochimica et Biophysica Acta - General Subjects (1981), 671

The Mr 37 000 D-alanyl-D-alanine peptidase excreted by Streptomyces R61 and the Mr 53 000 D-alanyl-D-alanine peptidase excreted by Actinomadura R39 are both characterized by a very uneven distribution of ... [more ▼]

The Mr 37 000 D-alanyl-D-alanine peptidase excreted by Streptomyces R61 and the Mr 53 000 D-alanyl-D-alanine peptidase excreted by Actinomadura R39 are both characterized by a very uneven distribution of the basic (Arg + Lys) amino acid residues. Trypsin degradation of the heat-denatured enzymes generates (1) thirteen soluble peptides which contain from 2 to 28 residues in the case of the R61 enzyme and nineteen soluble peptides which contain 2 to 39 residues in the case of the R39 enzyme; and (2) three large segments or core peptides which, irrespective of the enzymes from which they originate, consist of 50-60, 70-80 and 110-120 residues. About 90% of the basic (Arg + Lys) amino acid residues are recovered in the soluble tryptic peptides. The core peptides represent 62% (Mr approximately 23 000) and 45% (Mr approximately 24 000) of the untreated R61 and R39 enzymes, respectively. One 28-residue soluble peptide isolated from the R61 enzyme represents the N-terminal portion of the protein whose sequence has been established. The penicillin attachment site of the R61 enzyme has been located in one of the core peptides. For the R39 enzyme, indirect evidence shows that the penicillin binding site is probably within one of the soluble peptides. [less ▲]

Studies on the value of incorporating the effect of dominance in genetic evaluations of dairy cattle, beef cattle and swine

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (1998), 4

Nonadditive genetic effects are currently ignored in national genetic evaluations of farm animals because of ignorance of the level of dominance variance for traits of interest and the difficult ... [more ▼]

Nonadditive genetic effects are currently ignored in national genetic evaluations of farm animals because of ignorance of the level of dominance variance for traits of interest and the difficult computational problems involved. Potential gains from including the effects of dominance in genetic evaluations include “purification” of additive values and availability of predictions of specific combining abilities for each pair of prospective parents. This study focused on making evaluation with dominance effects feasible computationally and on ascertaining benefits of such an evaluation for dairy cattle, beef cattle, and swine. Using iteration on data, computing costs for evaluation with dominance effects included costs could be less than twice expensive as with only an additive model. With Method Â, variance components could be estimated for problems involving up to 10 millions equations. Dominance effects accounted for up to 10% of phenotypic variance; estimates were larger for growth traits. As a percentage of additive variance, the estimate of dominance variance reached 78% for 21-d litter weight of swine and 47% for post weaning weight of beef cattle. When dominance effects are ignored, additive evaluations are “contaminated”; effects are greatest for evaluations of dams in a single large family. These changes in ranking were important for dairy cattle, especially for dams of full-sibs, but were less important for swine. Specific combining abilities cannot be included in sire evaluations and need to be computed separately for each set of parents. The predictions of specific combining abilities could be used in computerized mating programs via the Internet. Gains from including the dominance effect in genetic evaluations would be moderate but would outweigh expenditures to produce those evaluations. [less ▲]

Studio della pressione endocranica nei traumatizzati cranici gravi. Correlazione tra la gravita del trauma ed il valore prognostico.

in Minerva Anestesiologica (1985), 51(7-8), 377-9

Study of hydrodynamics inside a single use parallelepiped stirred bioreactor equipped with an elliptic motion paddle

Conference (2010, August)

Study and Characterization of Inclusions in Steels obtained from ESR and Conventionally Electrical Ingot Processes

in Proceedings of the Annual Meeting of the SBM (société belge de microscopie). (1999)

The aim of this research is to establish in a quantitative and statistically justifiable way the relationship between on the one hand, the cleanliness of the steel, the amount of carbides and the ... [more ▼]

The aim of this research is to establish in a quantitative and statistically justifiable way the relationship between on the one hand, the cleanliness of the steel, the amount of carbides and the microstructure of the materials, and then on the other hand their mechanical properties in service. [less ▲]