THE POTENTIAL USE OF ANTIBODIES FROM EGG YOLKS OF BIRD EGGS IN THE CONTEXT OF FOOD SECURITY OF THE RUSSIAN FEDERATION

Bering E. proposed the principle of passive immunization at the end of the 19th century. Today, it is still used to treat tetanus, diphtheria, botulism, rabies and poisonous animal bites (snakes, spiders and scorpions). As before, equine antibodies or their fragments are used as an antidote. But the unique properties of antibodies from the yolks of chicken eggs (IgY) make it possible to use them for a wide range of therapeutic and prophylactic purposes. IgY-antibodies are used in several countries (Canada, Germany, Japan, China) on an industrial scale to produce medical and veterinary drugs to protect humans and animals against pathogens, providing highly effective immunological protection. The Romanian Romvac Company SA is a separate company in the series of manufacturers of these drugs. This company produces IgY preparations in limited batches against many antigens and practices the production of personalized antibodies directed at pathogens of a particular patient. This approach is guaranteed to damage the pathogen, however unique it may be. The authors have analyzed many review articles on the use of IgY-technology. These antibodies are nonaddictive, non-toxic, do not interact with rheumatoid factor, complement, or Fc-fragments of immunocompetent cells, and do not cause antibody-dependent reinforcement of infection. Oral administration of specific IgY-antibodies significantly reduces the manifestations of celiac disease and pathological conditions caused by activation of pathogens in the gastrointestinal tract. Passive immunization of young farm animals with IgY-antibodies is economical and practical against many mammals, birds and aquatic animals. The great potential of this new direction can provide a rapid and cost-effective breakthrough in improving the adequate food security of the Russian Federation.

Variation in Bird Eggs—Does Female Factor, Season, and Laying Order Impact the Egg Size, Pigmentation, and Eggshell Thickness of the Eggs of Capercaillie?

Despite numerous studies, intra-species variation in bird eggs is still not well explained. In the presented studies, we investigated the possible sources of this variation: female factor, laying order, and season, using the following traits of Capercaillie eggs as an example: egg size and shape, eggshell lightness, and thickness. Samples were collected for three years from three Capercaillie breeding centres located in different parts of Poland, where birds are kept in conditions close to their natural habitat and have a similar diet. The obtained results showed no significant impact of laying order on egg size, shape, pigmentation, nor eggshell thickness. This indicates that the provided nutrition ensures an adequate supply of minerals for the entire laying period. Most results did not show statistically significant differences between eggs from different breeding centres, but in one breeding centre, eggshells had lighter pigmentation. We assume the observed differences may result from females’ individual features or local environmental conditions. Egg traits were highly consistent for individual females, proving that visual identification can be useful in identifying the eggs of different females.

On a Class of Polar Log-Aesthetic Curves

Curves are essential concepts that enable compounded aesthetic curves, e.g., to assemble complex silhouettes, match a specific curvature profile in industrial design, and construct smooth, comfortable, and safe trajectories in vehicle-robot navigation systems. New mechanisms able to encode, generate, evaluate, and deform aesthetic curves are expected to improve the throughput and the quality of industrial design. In recent years, the study of (log) aesthetic curves have attracted the community’s attention due to its ubiquity in natural phenomena such as bird eggs, butterfly wings, falcon flights, and manufactured products such as Japanese swords and automobiles. A (log) aesthetic curve renders a logarithmic curvature graph approximated by a straight line, and polar aesthetic curves enable to mode user-defined dynamics of the polar tangential angle in the polar coordinate system. As such, the curvature profile often becomes a by-product of the tangential angle. In this paper, we extend the concept of polar aesthetic curves and establish the analytical formulations to construct aesthetic curves with user-defined criteria. In particular, we propose the closed-form analytic characterizations of polar log-aesthetic curves meeting user-defined criteria of curvature profiles and dynamics of polar tangential angles. We present numerical examples portraying the feasibility of rendering the logarithmic curvature graphs represented by a straight line. Our approach enables the seamless characterization of aesthetic curves in the polar co-ordinate system, which can model aesthetic shapes with desirable aesthetic curvature profiles.

Use of Site-Specific Data for Modeling Selenium Bioaccumulation by Terrestrial Animals

We developed a bioaccumulation model from an extensive set of monitoring data to predict selenium (Se) concentrations in biota within a terrestrial system (Kesterson Reservoir, CA). The model uses water-extractable Se concentrations in soil to estimate the expected range of mean Se concentrations in biota at Kesterson for future scenarios. Biological monitoring data collected at Kesterson Reservoir from 1988 to 1994 were used to parameterize the initial model. The model was tested and updated with additional sample results from 1995 through 2001 biological monitoring and validated and calibrated using Se concentrations from sampling conducted in 2004 and 2006. Minor adjustments were made to the model based on each additional year’s results and the model was used in 2014 to assess whether there were continuing threats to wildlife at Kesterson. The model predicts Se concentrations in small mammals, bird blood, and bird eggs in common species found at Kesterson. This model was used for the final assessment of Kesterson in 2014 and performed well, but there was variability in results due to differences in individual diets and feeding ranges of animals. In the comparisons of 2014 predicted to measured Se, only whole-body mice, deer mice (Peromyscus maniculatus), and kestrel blood were significantly different. The trophic transfer factors and regression equations should be applicable to other Se-contaminated sites; adjusting weighting factors based on diet and range allows the model to be adapted and used at other sites.

A Trust from the Ancestors: Islamic Ethics and Local Tradition in a Syncretistic Ritual in East-Central Sulawesi

Molabot Tumpe is a unique traditional ritual that binds together Batui and Banggai, two geographically distant Muslim communities of East-Central Sulawesi, Indonesia. The ritual consists of an annual offering of maleo bird eggs by the inhabitants of Batui to the élite of the old Banggai sultanate. Originating in tribute-giving ceremonies and ancestral cults, the purpose of the ritual is now understood and explained in thoroughly Islamised ethical terms. However, both the general purpose and the precise details of the ritual have been contested by environmentalists, by part of the traditional local élite, and by proponents of Islamic reformism, the last of whom question the accepted interpretation of the ritual’s purpose, as well as its moral foundations, and object to crucial elements of the ceremonies, especially the idea of possession by ancestral spirits. Besides giving an ethnographic description of the ritual, the article addresses the general issue of religious syncretism in Islam.

GLOBAL PANDEMIC IMPACT ON THE NATIONAL IMPORT SUBSTITUTION IN THE AGRICULTURAL SECTOR OF THE ECONOMY

The article presents the materials of theoretical and empirical studies on the analysis of import substitution processes in the agricultural sector during the 2020 pandemic. The sides of the food market development for the situation in 2020 are listed. The analysis of foreign trade in various types of food during the pre-pandemic period and 2020 is presented by groups: “Meat and edible meat products” taking into account the level of meat supply of the domestic market by species from 1990-2019; “Fish and crustaceans, molluscs and other aquatic invertebrates” taking into account the catch, export and consumption; “Dairy products; bird eggs; natural honey” taking into account the analysis of imports of certain types of dairy products (milk, butter, whey and cheese), “Vegetables and some edible root vegetables and tubers” taking into account a separate group of growing imports of ginger and garlic, “Edible fruits and nuts; peel of citrus fruits or melons”, “Coffee, tea, mate, or Paraguayan tea and spices”, “Fats and oils of animal or vegetable origin” taking into account the analysis of the import of palm oil. Each group of goods is analyzed from 1990 to 2020 for imports, taking into account the provision of the population with food and the change in the typical volume of imports during the calendar year from the conditions of the import substitution policy and under the influence of the pandemic factor. The features of consumer behavior of the Russian population when purchasing food are analyzed. The staging of food consumption among the Russian population in the context of the COVID pandemic in 2020 is highlighted. Conclusions on the negative and positive impact of the pandemic on import substitution in the agricultural sector are drawn.