ABSTRACT
Pigs of Belgian Landrace (B), Duroc (D), Hampshire (H), and Pietrain (P) breeds were slaughtered at 90, 110 and 130 kg body weight (BW) and the carcass chemical composition and fatty acid profiles of intramuscular fat of loin and backfat were determined. The carcass of Pietrain pigs had a higher concentration of protein and less fat than of B, D and H breeds. In tissues, the PUFA:SFA ratio was lower in the heavier (130 kg BW) than in lighter pigs (90 and 110 kg BW). This feature was higher in P pigs compared with the other breeds. The backfat had a higher concentration of PUFA:SFA ratio than intramuscular fat. The PUFA n- 6:n- 3 ratio was not affected by the breed and weight of pigs, but it was lower in backfat than in longissimus muscle fat. The protein concentration in the carcass was positively related to PUFA and negatively to SFA concentration in tissues.
Subject(s)
Adipose Tissue/chemistry , Body Weight , Fatty Acids/analysis , Meat/analysis , Muscle, Skeletal/chemistry , Proteins/analysis , Animals , Back , Cadaver , Fatty Acids/genetics , Proteins/genetics , SwineABSTRACT
In an N balance experiment with male crossbreeding lambs at an age of 3 ... 4 months four different rations were given differing in energy concentration (high greater than 700 EFU cattle/kg DM and low less than 650 EFU cattle/kg DM) and in the energy source (sugar, starch or crude fibre) with crude protein intake being almost equal. The rations contained 2% urea. Microbial protein synthesis in the rumen was assessed according to ROTH and KIRCHGESSNER (1978) (1), RYS et al. (1975) (2) and BICKEL-BAUMANN and LANDIS (1986) (3) on the basis of allantoin excretion in urine. The highest ruminal protein synthesis quotas were 868 ... 921 mg protein N per kg LW0.75 in (2). In (3) 723 ... 766 mg protein N/kg LW0.75 were synthesized. From the 15N labelling of the supplemented urea and the excreted allantoin it could be calculated that 26 ... 40% of the microbial protein resulted from the urea-N of the ration. Despite a high crude protein content of the ration of between 16 and 17% in the DM and a relation of NPN: pure protein of 0.95 the utilization of the NPN in the ration was relatively high but slightly lower than the utilization of pure protein. The variants with higher energy concentration showed as a tendency higher allantoin excretion in spite of slightly lower dry matter intake and a slightly higher NPN utilization than the variants with lower energy concentration.
Subject(s)
Allantoin/urine , Animal Feed , Bacterial Proteins/biosynthesis , Dietary Proteins/metabolism , Sheep/metabolism , Animals , Male , Nitrogen/metabolism , Rumen/microbiology , Urea/metabolismABSTRACT
Advances in technology and decreasing costs are enabling microcomputers to displace more traditional devices in the scientific laboratory. The availability of various approaches to software-system development for the use of microcomputers in the on-line control of experiments has contributed to the trend. This report describes a software system developed to control conditioned behavior during schedules of reinforcement while simultaneously accumulating behavioral data and physiological (analog) data using a hardware system base on the Radio Shack TRS-80 Model I microcomputer. The software utilizes a high-level interpretive language (Microsoft BASIC), assembly language and compiled BASIC to attain an acceptable execution speed and ease of programming.
