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This review aims to analyse the use and effects of carotenoids in salmonid aquafeeds. Species of the family Salmonidae are of great interest for aquaculture due to their many properties, like fast growth and nutritional quality. Some species from this family are among the most farmed fish in the world. Thus, there are many studies on different farming technologies, fish biology, market dynamics and others. However, there are always new challenges in the aquaculture of salmonids, being a continuously improving activity. Consumers are becoming more considerate about what they choose to buy and consume. Thus, some aspects emerge as great influencers in the buying decisions of consumers, such as animal welfare, in addition to usual influencing factors, like product freshness and colour. A category of ingredients used in the salmonid aquaculture are carotenoids. They are pigments supplemented to diets for colouring the fish flesh, making it more appealing to consumers. However, some other benefits can also be observed, especially on the health of fishes. Be it synthetic or natural, carotenoids have become a largely used ingredient in salmonid aquafeeds. [ABSTRACT FROM AUTHOR]

The digestive system of fish is different from one species to another, depending on the type of food ingested. Danube salmon Hucho hucho (Linnaeus, 1758) is a critically endangered species of the Salmonidae family with the threat of extinction looming large, therefore conservation efforts are urgently needed. This study presents a detailed microscopic analysis of the Zeissl membrane in Danube salmon, through histological means. The biological material analyzed consisted of six fish raised in a specialized breeding farm for restocking purposes. Samples were collected from the gastrointestinal tract and processed using histological paraffin embedding. The Zeissl membrane was present in all studied segments, but its structure and development varied. It comprised the stratum compactum (SC) and stratum granulosum (SG). The SC formed a continuous membrane with unequal thickness in most of the studied segments, except for the cardia area of the stomach, where it appeared discontinuously, and the duodenum, where it only appeared between the apertures of the pyloric caeca. Aside from its role in limiting gastrointestinal distension, it may have other implications for the morphophysiology of the Danube salmon digestive tract. [ABSTRACT FROM AUTHOR]

Metabolism, a manifestation specific to life, represents the set of physical and chemical processes through which living matter achieves continuous renewal to function and organize the specific activity. The physical-chemical composition of goat milk is conditioned by breed, individuality, area, and age. This study analyzes the physical-chemical composition of milk from a population of Carpathian goat breed, in the first seven postpartum days (first, third, and seventh day) according to age (primiparous and multiparous) to observe the physical-chemical changes from colostrum to milk. The physical-chemical parameters analyzed were: fat (g/100 g); protein (g/100 g); casein (g/100 g); lactose (g/100 g); solid non-fat - SNF (g/100 g); total dry matter (g/100 g); pH; freezing point (FP); urea mg/dl; somatic cells count - SCC/ml x 1000; total bacteria count - TBC/ml x 1000. Results highlight the intense changes that occur at the physico-chemical level of goat's milk to cover the nutritional requirements of the newborn goat and indicate the health status of the mammary gland. [ABSTRACT FROM AUTHOR]

This research was conducted to determine the effect of oregano essential oil added to the diet of broilers on body weight gain, feed consumption, feed conversion ratio (FCR) and on the chemical composition of meat and liver. For this purpose, two groups of one-day old broiler chickens Ross 308, a control group (CG) and an experimental group (EG) were raised for 42 days. In the experimental group, 1% of oregano essential oil was added to the standard diet, dissolved in vegetable oil and mixed with the administered diet. The live body weight (LBW) of the chickens at 42 days was higher in the control group (2099.69±29.56 g) compared to that of the experimental group (1972.23±42.20 g). The total feed consumption of the control group was 4393.62 g per bird, higher in comparison with the experimental group, which registered 4067.45 g per bird. The feed conversion indices of 2.14 (CG) and 2.11 (EG), favouring the experimental group. With regards to the chemical composition of meat and liver, a higher proportion of dry matter was recorded in the samples collected from breast and thighs musculature and liver of experimental group of chickens. [ABSTRACT FROM AUTHOR]

Sheep milk has a high nutritional value and is an important source of fatty acids, calcium, magnesium, phosphorus, iron, etc., which contribute to the body's health. In addition to the use of raw milk, the main use of sheep's milk is the production of traditional cheeses obtained by small farmers or regional cheese producers. However, the quality of the obtained cheeses depends on the raw material, namely milk, which has to be free of pathogenic microorganisms. This study aims to highlight the importance of the quality of raw milk to obtain high-quality cheeses. Milk and telemea cheese samples were collected from Țurcană sheep breed farmed in Vințe farm, Cluj county, Romania. The physicochemical analyses were performed for both milk and cheese. The physicochemical analysis results for milk were: crude fat 8.98±0.18%, crude protein 5.08±0.16%, density 1.0345±0.01 g cm-3, acidity 17.2±0.97%. For the cheese, the results were: water 45.2±0.74%, dry matter (DM) 54.8±0.74%, crude fat 51.93±2.05% reported to DM, salt 5.63±0.31% and acidity 272.6±11.82%. The pleasant taste of cheese is due to the quality of the raw milk and the brine used. [ABSTRACT FROM AUTHOR]

Teacher burnout has been shown to be one of the most common negative consequences of the COVID-19 pandemic. This study aimed to identify distinct psychological resources and burnout risk profiles of teachers and examine their association with Kolb's educator roles and their professional experience. Methods: The survey data were collected from 330 preschool and primary school (84 males, Mage = 38.3, SD = 9.14) teachers using a convenience sampling method. Results: The two-step cluster analysis revealed two distinct profiles. The first profile, "high psychological resources, no burnout risk," was characterized by absent symptoms of burnout and increased levels of well-being, self-control, and positive emotionality. The second profile, "moderate psychological resources, mild burnout," was associated with medium levels of well-being, self-control, and positive emotionality accompanied by mild burnout. Our findings highlighted that cluster one had a significantly higher score for the facilitator role and cluster two for the expert and coach roles. Additionally, teachers with less professional experience were more likely to belong to cluster one, considering their adequate skills in digital literacy. Conclusions: These findings provide new insights into the explanation of teacher burnout and the design of intervention programs. [ABSTRACT FROM AUTHOR]

Fish meat is an important source of nutrients, having organoleptic and dietary properties, especially important for human nutrition, in the form of essential and non-essential amino acids, and unsaturated fatty acids such as Omega 3, Omega 6, Omega 9 and Omega 12. They are essential for preventing and treating cardiovascular disease or various forms of cancer, like colorectal cancer. In the present study, characteristics and chemical properties of the meat were analyzed in eight different fish species: rainbow trout (Oncorhynchus mykiss), common carp (Cyprinus carpio), silver carp (Hypophthalmichthys molitrix), European sea bass (Dicentrarchus labrax), golden grey mullet (Liza aurata), mackerel (Scomber scombrus), sea bream (Sparus aurata) and prussian carp (Carassius gibelio). The characteristics and chemical properties of the meat were analyzed, taking into account the anatomical muscle segments (epaxial muscles, hypaxial muscles and caudal peduncle muscles). The analyses of the chemical composition of the meat consisted of: water content (%), dry matter (%), crude protein (Pb%), crude fat (Gb%) and mineral content (Min.%). The proximate analysis results are influenced by many factors, such as the sex of fish, the age of fish, the catch season, the farming system used, the geographical region of catch, the time from harvest to analysis, the conservation method, and many others. The results offer important information regarding the structure and composition of fish meat available on the market. [ABSTRACT FROM AUTHOR]