Dominant Characteristics Research Articles

A Study on the Structure of Feeling in Charlotte Bronte’s The Professor

Raymond Williams (1921-1988), one of the most influential Marxist cultural critics in the 20th century, proposed the concept of “structures of feeling” to reproduce the social psychology and emotional experience of people from an era. The structures of feeling are most conspicuous during social transformation and implicit in literary works of the same period. This paper intends to examine Charlotte Bronte’s novel The Professor with Raymond Williams’ “structures of feeling” theory to find out the conflict and contradiction between the real feelings of the characters in the novel and the dominant cultural characteristics, as well as the author’s solution strategy — the magic formula, and to uncover the participation of literary works in British empire construction.

Influence of inflow conditions on simplified heavy vehicle wake

In the current study, the impact of various inflow conditions, including turbulent wind profiles and turbulent intensity, on the wake flow topology of a simplified ground transportation system (GTS) model was investigated using the improved delayed detached eddy simulation. The reliability and accuracy of the numerical method adopted in this paper were verified against the results comprising the aerodynamic drag and the wake flow structure of the GTS model obtained from the large eddy simulation and the experimental data. The research results indicate that turbulent winds characterized by logarithmic and uniform velocity profiles resulted in significantly different wake flow topologies yet exhibit the same dominant frequency. The turbulent intensity also plays a crucial role in the wake of the GTS model. It is observed that an increase in turbulence intensity corresponds with a rise in the aerodynamic drag. Specifically, when the turbulence intensity is set at 15%, there is a 3.68% increase in the aerodynamic drag of the GTS model compared to a case where the turbulence intensity was only 5%. In addition, the turbulent intensity is critical to the dominant frequency characteristics of the wake region of the GTS model. These results demonstrate that both the velocity profiles and the turbulence intensities significantly influence the wake flow topology and aerodynamic drag of the GTS model, providing a valuable reference for establishing appropriate inflow conditions and exploring the formation mechanism of flow topology in the wake of the GTS model.

Mitigating adverse impacts of reservoir impoundment on lake ecology: A case study of the Three Gorges Reservoir and Dongting Lake

Upstream reservoir impoundment has brought adverse impacts on the downstream river-connected lakes, including lower water levels, frequent droughts, and reduced biodiversity. Existing research on ecological reservoir operation focused more on the effectiveness of operation redesign for ecology improvement, but less discussion on why they are eco-friendly. In this paper, the reservoir operation mechanisms targeting lake ecology are explored from three perspectives: ecological impoundment strategy, dominant characteristics of ecology and conservation tradeoffs, and critical parameters of the rule curves. Therefore, a reservoir operation framework, which couples the lake hydrological response model and multi-objective optimization model, is developed in this study. This framework is to maximize the water conservation and lake ecology benefits, assessing the latter by ecological reliability and ecological water shortage rate. Taking the Three Gorges Reservoir and Dongting Lake as the case study, operation rule curves are optimized for different impoundment strategies. The results indicate that impoundment with early storage time and slow storage rate can improve the ecological reliability and ecological water shortage by 9.90 % and 16.39 % than conventional operation. The ecological objectives are weakly competitive or synergistic when impounding fast, but strong competitive when impounding slow. Meanwhile, as the storage rate declines, the ecological improvement causes a slight decrease in power generation and a significant decrease in water supply. Finally, the crucial parameters of the rule curves are explored and appropriate values are recommended for different ecological preferences.

Accelerating Digital Supply Chain Management Practices, Customer Development, and Firm Performance: Organizational Culture Matters

Firms and suppliers are now using new digital technologies to make decisions for successful strategies. Firms are struggling with the supply chain dynamics needed to increase revenue and mitigate risk, and improve resilience after COVID-19. With the setting of strong competition and firms' business models shifting to digital transformation, this study examines the link between organizational culture (OC) and digital supply chain management practices (DSCMP) in generating a positive impact on firm performance (FP), including both direct and indirect influences via customer development (CD). Smart PLS 3.3.3 was used to analyze data from 326 respondents who registered as business managers who operate their supply chains using digital technologies. The findings indicated that DSCMP, CD, and OC had a favorable impact on FP, while DSCMP and OC had a beneficial impact on CD. It was also determined that DSCMP and CD played a mediating role in both of the above-mentioned associations. DSCMP and OC are two essential enablers for developing a firm’s customer base and improving performance efficiency in digital supply chains. Based on the Resource Dependence Theory (RDT), this study found that digitalization-related capabilities in supply chain management practices must be developed inside the company to improve the firm’s efficiency. Firm culture, accompanied by dominant characteristics, organizational leaders, organizational glue, and strategic emphasis should become essential components of DSCMP in organizations.

Cleidocranial dysplasia associated with dentigerous cyst-review of literature and case report of two siblings.

Cleidocranial dysplasia (CCD) is a developmental anomaly of the skeleton and teeth which may be inherited, be transmitted as dominant characteristics in either male or female or even appear spontaneously. A case was reported in the department of oral medicine and radiology of two sisters age 17 and 19 years old with a chief complaint of milk teeth not falling since childhood. They presented specific physical and oral findings in common which suggested the idea of an undiagnosed syndrome. The sisters showed CCD characteristics including short stature (4 feet) and frontal bone resorption indicating delayed closure of fontanels. The stature is moderately shortened with the neck appearing long and narrow and the shoulders markedly dropped. Dental abnormalities such as retention of primary dentition, multiple supernumerary teeth, and delayed eruption of permanent dentition. OPG showed the presence of multiple impacted permanent and supernumerary teeth with radiolucency involving the crowns of impacted teeth revealing a cystic lesion. Lateral cephalogram also revealed the presence of multiple impacted teeth. The provisional diagnosis of CCD with dentigerous cyst was given. The enucleation of cyst was done and submitted for histopathological examination. Histopathologically, the soft tissue section suggested the features of dentigerous cyst. The final diagnosis of CCD associated with dentigerous cyst was confirmed.

Model order reduction based on low-rank approximation for parameterized eigenvalue problems in structural dynamics

This study introduces a novel reduced-order modeling approach for parameterized eigenvalue problems. The proposed framework represents eigenvectors as a low-rank approximation and is implemented using an offline-online strategy. In the offline stage, nonlinear equations are formulated by imposing a stationary condition on the weighted Rayleigh quotient over sampled points and eigenvalues of interest. A variant of the Krylov subspace approach is applied to progressively identify the dominant response characteristics at sampled points. In the online stage, a reduced-order model is obtained through Galerkin projection, and eigensolutions at unsampled points are determined. The performance of the proposed framework is validated through numerical examples, where perturbation, least-angle regression, and Gaussian process are considered for comparison. The obtained results demonstrate that the proposed framework can accurately estimate eigensolutions, even when eigenvalues are adjacent to each other. In terms of efficiency, the a priori construction of the low-dimensional basis is possible without solving the full-order model, resulting in substantial CPU time savings during the offline computation process. Lastly, the applicability of the proposed framework is investigated through an uncertainty quantification example using numerical and experimental results.

A review of microplastics in wastewater treatment plants in Türkiye: Characteristics, removal efficiency, mitigation strategies for microplastic pollution and future perspective

ABSTRACT The effluent of WWTPs is an important source of microplastics (MP) for the aquatic environment. In this review study, MPs in wastewater treatment plants (WWTP) in Türkiye and their removal from WWTPs are reviewed for the first time. First, MP characteristics in the influent and effluent of WWTPs in Türkiye are discussed. In the next section, the abundance of MPs in the influent and effluent of WWTPs in Türkiye and the MP removal efficiency of WWTPs in Türkiye are evaluated. Then, the results of studies on MP abundance and characteristics in Türkiye's aquatic environments are presented and suggestions are made to reduce MPs released from WWTPs into the receiving environments. Strategies for reducing MPs released to the receiving environment from WWTPs of Türkiye are summarized. In the last section, research gaps regarding MPs in WWTPs in Türkiye are identified and suggestions are made for future studies. This review paper provides a comprehensive assessment of the abundance, dominant characteristics, and removal of MPs in WWTPs in Türkiye, as well as the current status and deficiencies in Türkiye. Therefore, this review can serve as a scientific guide to improve the MP removal efficiency of WWTPs in Türkiye.

Influence of initiation modes on vibration frequency induced by single-hole blasting

To further reveal the blasting vibration frequency distribution characteristics induced by different initiation modes of the single borehole cylindrical charge, the PPV and Fourier dominant frequency formula under different initiation modes such as top initiation, bottom initiation, mid-point initiation, and two-point initiation are derived based on the Heelan equivalent unit short-column charge model. The results show that the dominant frequency distribution characteristics near the explosion source are as follows: two-point initiation > mid-point initiation > bottom initiation > top initiation; in the middle and far zones from the explosion source, the difference of dominant frequency induced by various initiation modes is insignificant; the attenuation curves of the dominant frequency of radial and vertical vibration abruptly change at the distance away from the blasting center of 20–50 m and 20–30 m, respectively. However, the curves of centroid frequency under different initiation modes attenuate smoothly with increasing distance, and the distribution rule is two-point initiation > mid-point initiation > bottom initiation > top initiation. In general, the influence of initiation mode on the particle vibration dominant frequency and centroid frequency is gradually weakened with increasing distance. Finally, the theoretical calculation is verified by the experimental data.

Miniaturized screening and performance prediction of tailored subcutaneous extended-release formulations for preclinical in vivo studies

Microencapsulation of active pharmaceutical ingredients (APIs) for preparation of long acting injectable (LAI) formulations is an auspicious technique to enable preclinical characterization of a broad variety of APIs, ideally independent of their physicochemical and pharmacokinetic (PK) characteristics. During early API discovery, tunable LAI formulations may enable pharmacological proof-of-concept for the given variety of candidates by tailoring the level of plasma exposure over the duration of various timespans. Although numerous reports on small scale preparation methods for LAIs utilizing copolymers of lactic and glycolic acid (PLGA) and polymers of lactic acid (PLA) highlight their potential, application in formulation screening and use in preclinical in vivo studies is yet very limited. Transfer from downscale formulation preparation to in vivo experiments is hampered in early preclinical API screening by the large number of API candidates with simultaneously very limited available amount in the lower sub-gram scale, lack of formulation stability and deficient tunability of sustained release.We hereby present a novel comprehensive platform tool for tailored extended-release formulations, aiming to support a variety of preclinical in vivo experiments with ranging required plasma exposure levels and timespans. A novel small-scale spray drying process was successfully implemented by using an air brush based instrument for preparation of PLGA and PLA based formulations. Using Design of Experiments (DoE), required API amount of 250 mg was demonstrated to suffice for identification of dominant polymer characteristics with largest impact on sustained release capability for an individual API. BI-3231, a hydrophilic and weakly acidic small compound with good water solubility and permeability, but low metabolic stability, was used as an exemplary model for one of the many candidates during API discovery. Furthermore, an in vitro to in vivo correlation (IVIVC) of API release rate was established in mice, which enabled the prediction of in vivo plasma concentration plateaus after single subcutaneous injection, using only in vitro dissolution profiles of screened formulations.By tailoring LAI formulations and their doses for acute and sub-chronic preclinical experiments, we exemplary demonstrate the practical use for BI-3231. Pharmacological proof-of-concept could be enabled whilst circumventing the need of multiple administration as result of extensive hepatic metabolism and simultaneously superseding numerous in vivo experiments for formulation tailoring.

Variations in Key Aroma Compounds and Aroma Profiles in Yellow and White Cultivars of Flammulina filiformis Based on Gas Chromatography-Mass Spectrometry-Olfactometry, Aroma Recombination, and Omission Experiments Coupled with Odor Threshold Concentrations.

Flammulina filiformis (F. filiformis) is called the 'benefiting intelligence' mushroom. There is a notable difference between a yellow cultivar (with a robust aroma) and a white mutant cultivar (with a high yield) of F. filiformis. A thorough analysis of aroma differences is essential to improve the aroma of high-yield strains. This study employed a combination of gas chromatography-mass spectrometry-olfactometry (GC-MS-O) and aroma extract dilution analysis (AEDA) to analyze the variations in aroma compounds. Then, the contribution of the odorants was determined using flavor dilution (FD) factors and odor activity values (OAVs). Aroma omission and recombination experiments were used to identify the key odorants. A total of 16 key aroma compounds were characterized in F. filiformis, along with four eight-carbon volatiles (3-octanone, 3-octanol, octanal, and 1-octen-3-ol). Finally, the dominant aroma characteristic was "sweet" for the yellow strain, while it was "green" for the white strain. More research is required to investigate the enzymes and corresponding genes that regulate the synthesis of aroma compounds in F. filiformis for future breeding programs.

Pore Structure Characteristics of Shale Oil Reservoirs with Different Lithofacies and Their Effects on Mobility of Movable Fluids: A Case Study of the Chang 7 Member in the Ordos Basin, China

The Chang 7 member of the Triassic Yanchang Formation in the Ordos Basin is a significant continent shale oil reservoir in China. Therefore, conducting an in-depth investigation into the pore structure and fluid mobility characteristics of the Chang 7 shale oil reservoir holds immense importance for advancing shale oil exploration. This study conducts a detailed analysis of the pore structures and their impact on fluid mobility of the Chang 7 shale oil reservoir using multiple methodologies, i.e., a cast thin section, scanning electron microscopy (SEM), X-ray diffraction (XRD), high-pressure mercury injection (HPMI), low-temperature nitrogen adsorption (LTNA), and nuclear magnetic resonance (NMR). The results show that the sandstone in the Yanwumao area of the Chang 7 shale oil reservoir consists mainly of lithic arkose and feldspathic litharenite, which can be classified into three lithofacies (massive fine-grained sandstone (Sfm), silt-fine sandstone with graded bedding (Sfgb), and silt-fine sandstone with parallel bedding (Sfp)). Moreover, three pore structures (Type I, II, and III), and four pore spaces (nanopores, micropores, mesopores, and macropores) can be characterized. Pore structure Type I, characterized by large pores, exhibits bimodal pore diameter curves, resulting in the highest levels of movable fluid saturation (MFS) and movable fluid porosity (MFP). Pore structure Type II demonstrates unimodal pore structures, indicating robust connectivity, and higher MFS and MFP. Pore structure Type III primarily consists of dissolved and intercrystalline pores with smaller pore radii, a weaker pore configuration relationship, and the least fluid mobility. Furthermore, a correlation analysis suggests that the pore structure significantly impacts the fluid flowability in the reservoir. Favorable petrophysical properties and large pores enhance fluid flowability. Micropores and mesopores with high fractal dimensions have a greater impact on reservoir fluid mobility compared to macropores and nanopores. Mesopores mainly control MFS and MFP, while micropores govern the shift from bound fluid to movable fluid states. Among the lithofacies types, the Sfm lithofacies exhibit the highest fluid mobility due to their significant proportion of macropores and mesopores, whereas the Sfgb lithofacies have lower values because they contain an abundance of micropores. The Sfp lithofacies also dominate macropores and mesopores, resulting in medium fluid mobility levels. This study combines lithofacies types, micro-reservoir pore structure characteristics, and mobile fluid occurrence characteristics to better understand the dominant reservoir distribution characteristics of the Chang 7 shale oil reservoirs in the Ordos Basin and provide theoretical information for further optimization of production strategies.

Morphometric and Phenotypic Characterization of Pote Goats in Soket Laok Village, Tragah District, Bangkalan Regency, Madura

The purpose of this study was to analyze the morphometric characteristics of Pote goats in Soket Laok Village, Madura Island. The material used was 200 Pote goats with an age range from over 1 year (PI0>6) to more than 3.5 years (PI8). The sample included 90 goats aged over 1 year (PI0>6), 36 goats aged between 1 and 1.5 years (PI2), 54 goats aged between 1.5 and 2.5 years (PI4), 16 goats aged between 2.5 and 3.5 years (PI6), and 4 goats aged over 3.5 years (PI8). The method used is a survey method which includes conducting surveys and interviews. Data were obtained using a purposive sampling technique. The results showed that morphometric measurements on the head and body of Pote goats had the highest average at PI 8, which means that along with the increasing age of Pote goats, it will affect the body size of goats. The results of the dominant phenotypic characteristics of Pote goats are the shape of a pitcher udder, the shape of long drooping ears, the shape of flat horns, rectangular pupils, convex facial profiles, there is rewos hair both in males and females and there is no beard, and phenotypic Pote goats with different ages do not have significant differences.

Is there a difference in the education of generations across time?

An interesting reading tends to be a summary of the dominant characteristics of each generation, which can be found in scientific and vocational publications as well as in media with popularization texts. Very often, we also identify among them our own characteristics and qualities, or those of our peers, children, and possibly other descendants. It is natural that the development of science and technology has a significant role in shaping the personality profile of the members of each generation during the historical development of society (for example, from the “lost” generation to the “alpha” generation). This factor influences the content, methodological and didactic aspects of the teaching process, i.e. what and how to teach. The authors of the paper have worked on several aspects of the preparation of teaching materials and their use in school physics, often with overlap with other science subjects. One of these aspects is, for example, the need to influence the emotional side of the student in learning processes, which is an important prerequisite for more permanent “inscriptions” of information in the student’s memory. For this process to work, knowledge of the dominant characteristics of the target group of students and the environment in which they grow up is essential.

Interactions between microplastics and Culex sp. larvae in wastewater.

Microplastics (MPs) are a growing issue because they endanger both aquatic organisms and humans. Studies have indicated that wastewater treatment plants (WWTPs) are one of the major contributors to MPs in the environment. However, studies on the abundance of MP contamination in WWTPs and its transmission into aquatic organisms are still scarce, especially in Egypt. The goal of this study was to examine the temporal fluctuations in the distribution of MPs in surface water and the dominant macroinvertebrate fauna (Culex sp. larvae) in a fixed wastewater basin in Sohag Governorate, Egypt. The average of MPs in the surface water was 3.01 ±0.9 particles/L. The results indicated to seasonal variation of MP abundance in the wastewater basin that was significantly higher in winter than in the other seasons. The risk index for polymers (H), pollution load index (PLI), and potential ecological risk index (RI) were used to assess the degree of MP contamination. The basin has moderate H values (<1000) because of the presence of polymers with moderate hazard scores such as polyester (PES), polyethylene (PE), and polypropylene (PP). According to the PLI values, surface water is extremely contaminated with MPs (PLI: 88 to 120). The RI values of surface water showed higher ecological risk (level V). MPs in Culex sp. larvae were seasonally changed with an 85% detection rate, and an abundance average of 0.24 ±0.65 particles/ind, MP concentration in Culex sp. larvae was influenced by the MP characters (shape, color, and polymer). The larvae of Culex sp. showed a greater preference for black and red fibrous polyester (PES) with sizes (<1000 μm) of MPs. These findings suggest that Culex sp. larvae prefer ingesting MPs that resemble their food. It is possible to overestimate Culex sp.'s preference for lower sizes because of their catabolism of MPs. To better understand the preferences of Culex sp. larvae for MPs, further controlled trials should be conducted. PRACTITIONER POINTS: Wastewater is highly contaminated with microplastics (MPs) in the different seasons. First report of detection of the seasonal abundance of MP in Culex sp. larvae. Culex sp. larvae showed a stronger feeding preference for MPs with specific characteristics. Smaller size and blue polyester fibers were the dominant characteristics of MPs in wastewater.

EXAMINING STUNTING INCIDENCE BASED ON MATERNAL FACTORS IN TEGAL CITY

Stunting, a condition resulting from inadequate nutrition, recurrent infections, and insufficient psychosocial stimulation, affects children's development. It is characterized by stunted growth due to nutritional deficiencies and chronic or recurring infectious diseases, indicated by a height-for-age z-score of less than -2 standard deviations. In Indonesia, the average prevalence of stunting among children under five is 30.8%. In Central Java, the prevalence is 28.5%, and in Semarang, it is 16.89%. The prevalence of stunting in Tegal City is projected to decrease by 6.7% in 2019, 4.76% in 2020, and 7.1% in 2021, reaching 16.8% from the initial value of 23.9%. This descriptive study focuses on identifying the determinants of mothers with stunted children. The study included all mothers with stunted children under five years of age in 7 villages of Tegal City, with a sample size of 27 willing participants. The findings highlight family income and maternal parity as the most dominant characteristics among the respondents. Maternal anemia, CED history, and excellent maternal knowledge level were also noted.

Dynamic Changes of Soil Microbial Communities During the Afforestation of Pinus Armandii in a Karst Region of Southwest China

Clarifying the response of soil microbial communities to vegetation restoration is essential to comprehend biogeochemical processes and ensure the long-term viability of forest development. To assess the variations in soil microbial communities throughout the growth of Pinus armandii plantations in the karst region, we utilized the “space instead of time” approach and selected four P. armandii stands with ages ranging from 10 to 47 years, along with a grassland control. The microbial community structure was determined by conducting Illumina sequencing of the 16 S rRNA gene and the ITS gene, respectively. The results demonstrated that afforestation with P. armandii significantly influenced soil microbial communities, as indicated by notable differences in bacterial and fungal composition and diversity between the plantations and the control. However, soil microbe diversity did not display significant variation across stand ages. Moreover, the bacterial community exhibited higher responsiveness to age gradients compared to the fungal community. Soil physicochemical factors play a critical role in elucidating microbial diversity and community composition variations during restoration processes. TN, AN, TP, AP, SOC, AK, and pH were the most significant influencing factors for the composition of bacterial community, while TC, SOC, pH, and TCa were the most significant influencing factors for the composition of fungal community. Our findings indicate substantial changes in soil bacterial and fungal communities across successive stages of development. Additionally, the changes in dominant bacteria and fungi characteristics across the age gradient were primarily attributed to variations in the prevailing soil conditions and chemical factors.

Using temporal dominance of sensations (TDS), multiple-sip TDS, chemical composition evaluation, and microstructural analysis to assess the impact of repeated reheating cycles on chicken soup

Reheating chicken soup is a common culinary practice in daily life. To investigate the impact of reheating frequency on the sensory quality of chicken soup, temporal dominance of sensations (TDS) and multi-TDS were used to characterize changes in dominant sensory attributes during consumption. Additionally, E-nose and E-tongue were utilized to analyze differences in aroma and taste profiles. The alterations in sensory properties were further elucidated by analyzing variations in amino acids, volatile compounds. The findings revealed that there was no significant disparity between fresh soup and heating. However, saltiness and umami, as the most prominent dominant characteristics, intensified with increasing reheating cycles. This can be attributed to an elevation in certain amino acids that contribute to umami perception. Conversely, a reduction in some aldehydes weakened the flavor associated with fat and meat components. Moreover, enlarged oil droplets with uneven distribution within heated soup may account for the heightened greasiness sensation.

Groundwater Depletion and Degradation in the North China Plain: Challenges and Mitigation Options

Groundwater is an important natural resource in the North China Plain (NCP) with high economic benefits and social significance. It fulfills 60% of drinking and 70% of irrigation water requirements. In this review, the information is retrieved from high-quality articles published in MEDLINE and other sources. We saw that groundwater is declining faster (&gt;1 m yr−1) and polluting with NO3− (&gt;30 mg L−1) due to excessive water pumping and application of a nitrogen (N) fertilizer, respectively. The water pumping (&gt;600 mm ha−1 yr−1) for agricultural purposes in the region is higher than the recharge amount (&lt;200 mm yr−1). The low recharge is the result of low rainfall (&lt;600 mm yr−1), and high evapotranspiration (&gt;800 mm yr−1) under the impact of dominant vegetative characteristics of winter wheat–summer maize (WW-SM) rotations, covering &gt;80% of the land. Furthermore, N application exceeds the crop assimilation capacity (&gt;250 kg ha−1 yr−1) and leach deep down (&gt;50 kg ha−1) as well as loss in the atmosphere. Presently, Beijing, Tianjin, and Hebei are ecologically the most affected areas. We suggest that excessive water and N fertilizer use for intensive cropping systems should be controlled by paying high attention to groundwater-friendly farming practices. In addition, artificial groundwater recharge options and their safe utilization would be explored across the region to replenish aquifers. This literature review contributes valuable insights to the knowledge bank and offers a foundation for further research and policy development.

Price volatility characteristics and policy implications of freshwater fish in China

The fisheries industry in China is experiencing rapid growth, but it is also encountering the challenge of frequent fluctuations in aquatic product prices. Freshwater fish aquaculture plays a crucial role in China’s fisheries industry. Analyzing the characteristics of price volatility in freshwater fish is crucial to ensure a stable supply of aquatic products and promote sustainable fisheries industry development. This study focuses on four freshwater fish species, namely crucian carp, grass carp, silver carp, and carp, to analyze the price volatility characteristics of freshwater fish in China from 2006 to 2022. The study uses the price decomposition method and the ARCH model. The results indicate that, from the perspective of dominant characteristics of price volatility, the prices of freshwater fish display periodic volatility with an overall upward trend, as well as significant seasonal and random variations. From the perspective of recessive price volatility characteristics, the price volatility of freshwater fish exhibits clustering and asymmetry. This indicates that the price volatility of freshwater fish is influenced by previous price volatility. Positive news has a greater impact on the price volatility of freshwater fish than negative news. Out of the four freshwater fish species, only the price of crucian carp is characterized by high-risk and high-return volatility.

Potato breeding at Gorsk State Agrarian University

The article highlights issues of breeding work at Gorsk State Agrarian University in 2022. Obtaining productive potato varieties that resistant to various pathogens in the conditions of the mountain foothills of the North Caucasus is the goal of the research. The main objectives are to identify dominant characteristics of the studied varieties for their further use as parent forms, to evaluate hybrid offspring based on the main economically valuable characteristics, to select the most valuable genotypes according to variety models for a given region (6). In the collection nursery parental pairs were identified for further use in the breeding process. The studies were carried out on mountain meadow and leached chernozems of the North Ossetia-Alania. The experiments were carried out according to the methods of selection and seed production developed by VIR, VIZR and VNIKH named after. A.G. Lorja. In various nurseries of the breeding process promising hybrid offspring were identified. In the maternal nursery more than 6.5 thousand seeds were obtained as a result of backcrossings in 7 combinations. In the nursery of first-year seedlings 15% of genotypes were rejected according to morphological characteristics. During harvesting 42% of genotypes were rejected and the selection rate was 58%. In the nursery of second-year seedlings the average selection among planted genotypes averaged 79.2%. In the nursery of seedlings of the third year hybrids of four combinations were tested, 3 of which were rejected, only 133 combinations of offspring were obtained, and the selection rate was 11.1%. The isolated hybrid progenies, namely, 12.64/368, 12.40/1 and 12.64/394 with a yield of 51.7 t/ha, 48.7 t/ha and 48.1 t/ha, and marketability of 82.3%, 80.0% and 84 .0% will accordingly be transferred to a breeding nursery for further research and submission to the State Crop Testing Site of the Russian Federation.