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The texture and histology of selected muscles (m. longissimus dorsi, m. quadriceps femoris, m. biceps femoris, and m. semimembranosus) of piglets and wild boar juveniles were compared. The muscle texture was determined with the TPA test performed with an Instron 1140 apparatus. Structural elements (muscle fibre cross-section area, peri- and endomysium thickness, area of intramuscular fatty tissue) were measured in muscle samples using a computer image analysis program. The young wild boar muscles showed higher values of textural parameters. The muscle fibre cross-section area and the area of intramuscular fatty tissue of the juvenile wild boar muscles were lower than those in the piglet meat, while the peri- and endomysium were thicker. Of the piglet and young wild boar muscles tested, the highest hardness, springiness, and chewiness were found in BF which, at the same time, showed the highest fibre cross-section area and the thickest peri- and endomysium. The highest thermal drip loss was typical of BF, both in piglets and wild boars, the lowest thermal drip being found in LD, a muscle with the most delicate histological structure. The juvenile wild boar muscles showed a higher thermal drip loss than the piglet muscles.
Myosin VI (MVI) is the only known myosin walking towards minus end of actin filaments. Here, MVI, but not myosins IB or IIB, was detected in chromaffin granules isolated from bovine medulla and found to be tightly associated with the granule apical surface. MVI also localized to secretory granules within rat pheochromocytoma PC12 cells as well as to the Golgi apparatus, endoplasmic reticulum and clathrin-coated pits. Notably, it was also found in the nucleus. RT-PCR revealed that MVI splice variants with a large insert (LI), characteristic of polarized cells, were barely detectable in PC12 cells, whereas variants with a small insert (SI) were the major isoforms. The presented data indicate that MVI in adrenal medulla cells is engaged in secretory vesicle trafficking within the cytoplasm and possibly also involved in transport within the nucleus.
In their article, the authors undertake an actual for a few years topic of ecological foods. They describe the system of control over organic foods in Poland and present the results of surveys carried out by the state laboratories in the last 4 years. They state that in the Polish market pseudoecoproducts are not rarity, therefore, there ought to be increased the number of controls and penalties imposed in case of breach of the rules concerning production and labelling of foods, including bio foods.
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