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  • Author: Monika Michalak x
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Oils from fruit seeds and their dietetic and cosmetic significance


Plant-origin oils are an essential element of the diet, affecting the preservation of health, but also of significant importance for the care of skin and its appendages. Among fats of plant origin, oils from fruit seeds are an important group. They are a rich source of fatty acids, tocopherols, tocotrienols, carotenoids, flavonoids, phytosterols and other bioactive compounds that have positive effect in relation to specific functions of the human body. Fruit seed oils play an important role in health prophylaxis, because they prevent the development of diseases of civilisation, alleviate the effects of stress and slow down the ageing process of the body. Due to the beneficial effects on the skin, they are also used in cosmetology. In formulations of cosmetic preparations, plant oils are the basis for the administration of other active ingredients, but they are also used due to their biological properties. The article discusses in detail the composition, dietary and cosmetic importance of oil from the seeds of raspberries, blackcurrants, rose hips and grapes.

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Frequency of occurrence of physical defects in turkey poults / Częstotliwość występowania wad budowy piskląt indyczych


The objective of this study was to determine poult quality in the first breeding season of turkeys. The study was conducted over a 24-week laying season of white broad-breasted Big 6 turkeys. Starting from the first week of laying, at three-week intervals, 504 eggs laid on the same day were weighed and the percentages of eggs weighing 70 to 100 g and more than 100 g were calculated. Results from the 21st week of laying season were not used due to failure of ventilation equipment. Each egg was visually inspected to determine the percentages of eggs with normal shell structure, rough-shelled eggs and eggs without shell pigmentation. Nine incubation cycles were carried out. Egg fertilization rates and hatch rates were determined. At the end of each incubation cycle, poults were weighed individually and divided into morphologically normal and morphologically defective. The latter were further subdivided into weak poults with poor motor skills, poults with abnormal feathers, eyes, legs and umbilicus, and poults with unabsorbed yolk sacs. Eggs with weight exceeding 100 g accounted for 17.9% and 46.6% of the analysed eggs at 12 and 24 weeks of the laying season, respectively. In week 12, eggs without shell pigmentation accounted for 8.3%. In week 24, the percentage of rough-shelled eggs was 6.7%. Most poults with physical defects hatched in weeks 1 and 3 of the laying period (65.67% and 76.84%, respectively). Weak poults with poor motor skills accounted for 0.2-2.5% of the examined birds. Wet feathers were noted in 0.9% to 4.1% of poults over the laying season. Leg abnormalities were observed in 6.5% to 7.8% of poults. Eye defects were encountered least frequently. In 41-70% of poults long black scabs were visible on their navels, and umbilical vessels were long. Unabsorbed yolk sacs were noted in 0.5% to 3.2% of poults.

Open access