Impact of linseeds on the slaughter value and meat quality of the improved white race buck kids

Celem badań była analiza wartości rzeźnej i właściwości fizykochemicznych koźląt ubijanych w wieku 150 dni. Po odsadzeniu w wieku 60 dni, w tuczu zastosowano mieszankę pełnoporcjową z 10 % udziałem nasion lnu. Stwierdzono statystycznie istotne (p ≤ 0,05) zwiększenie wydajności rzeźnej (45,80 %) oraz wyrębów cennych (udziec, comber) uzyskanych w grupie doświadczalnej. W tej grupie stwierdzono statystycznie istotnie (p ≤ 0,05) mniej tłuszczu w tuszy (o 1 %). Natomiast procentowa zawartość mięsa w udźcu (70,60 %) i w tuszy (60,71 %), choć nieco wyższa w grupie doświadczalnej, okazała się statystycznie nieistotna. Mięso koziołków żywionych nasionami lnu było ciemniejsze (L* 42,60) – p ≤ 0,0. Ponadto zawierało więcej (p ≤ 0,01) suchej masy (24,32 %) i białka (20,97 %) oraz mniej (p ≤ 0,05) tłuszczu (1,92 %). Pod względem sensorycznym wykazano zbliżoną przydatność kulinarną mięsa koziołków karmionych paszą z dodatkiem nasion lnu i mięsa koziołków grupy kontrolnej, co zostało potwierdzone brakiem statystycznie istotnych różnic.The objective of the research was to analyze the slaughter value and physicochemical parameters of buck kids slaughtered at the age of 150 days. At the age of 60 days, the buck kids studied were weaned on a balanced mixture containing 10 % linseeds as their fattening feed. It was found the their slaughter efficiency increased (by 45.80 %) statistically significantly (p ≤ 0.05) as did the quantity of valuable cuts (leg, loin) from the experimental group. Moreover, an the latter group a statistically significantly (p ≤ 0.05) lower amount of fat was found in the carcass (by approximately 1 %). However, the meat content in the leg (70.60 %) and in the carcass (60.71 %), although somewhat higher in the experimental group, appeared to be statistically insignificant. The meat of buck kids fed with linseeds was darker (L* 42.60) – p ≤ 0.01. What is more, it contained more (p ≤ 0.01) dry matter (24.32 %) and proteins (20.97 %), but less (p ≤ 0.05) fat (1.92 %). From the sensory point of view, both the meat of buck kids fed with linseeds added and the meat of buck kids in the control group showed a similar culinary usefulness confirmed by the fact that no statistically significant differences were found

Surface Modification for Microreactor Fabrication

In this paper, methods of surface modification of different supports, i.e. glass and polymeric beads for enzyme immobilisation are described. The developed method of enzyme immobilisation is based on Schiff’s base formation between the amino groups on the enzyme surface and the aldehyde groups on the chemically modified surface of the supports. The surface of silicon modified by APTS and GOPS with immobilised enzyme was characterised by atomic force microscopy (AFM), time-of-flight secondary ion mass spectroscopy (ToF-SIMS) and infrared spectroscopy (FTIR). The supports with immobilised enzyme (urease) were also tested in combination with microreactors fabricated in silicon and Perspex, operating in a flow-through system. For microreactors filled with urease immobilised on glass beads (Sigma) and on polymeric beads (PAN), a very high and stable signal (pH change) was obtained. The developed method of urease immobilisation can be stated to be very effective

Automatic air volume control system for ventilation of two patients using a single ventilator: a large animal model study

Abstract The COVID-19 pandemic outbreak led to a global ventilator shortage. Hence, various strategies for using a single ventilator to support multiple patients have been considered. A device called Ventil previously validated for independent lung ventilation was used in this study to evaluate its usability for shared ventilation. We performed experiments with a total number of 16 animals. Eight pairs of pigs were ventilated by a ventilator or anesthetic machine and by Ventil for up to 27 h. In one experiment, 200 ml of saline was introduced to one subject’s lungs to reduce their compliance. The experiments were analyzed in terms of arterial blood gases and respiratory parameters. In addition to the animal study, we performed a series of laboratory experiments with artificial lungs (ALs). The resistance and compliance of one AL (affected) were altered, while the tidal volume (TV) and peak pressure (Ppeak) in the second (unaffected) AL were analyzed. In addition, to assess the risk of transmission of pathogens between AL respiratory tracts, laboratory tests were performed using phantoms of virus particles. The physiological level of analyzed parameters in ventilated animals was maintained, except for CO2 tension, for which a permissive hypercapnia was indicated. Experiments did not lead to injuries in the animal’s lungs except for one subject, as indicated by CT scan analysis. In laboratory experiments, changes in TV and Ppeak in the unaffected AL were less than 11%, except for 2 cases where the TV change was 20%. No cross-contamination was found in simulations of pathogen transmission. We conclude that ventilation using Ventil can be considered safe in patients undergoing deep sedation without spontaneous breathing efforts