Valuable Properties Research Articles

Selection of probiotic microorganisms in the composition of a new biological preparation for farm animals

The idea of a healthy diet is gaining popularity, which justifies consumer interest in environmentally friendly and biologically complete livestock products. In this regard, the development and use of probiotic preparations in feeding farm animals and identifying the effectiveness of their use is an urgent task of our time. An essential step in creating new biological products is the study and selection of strains for the composition of the starter since the probiotic effect of microorganisms is determined by the set of natural properties they possess. In this work, the biological and technologically valuable properties of 12 strains of lactobacilli and 15 strains of propionic acid bacteria from the Siberian collection of microorganisms of the laboratory of the microbiology of milk and dairy products of the SRICM FGBNU FANZA (Siberian Research Institute of Cheese Making of Federal State Budgetary Scientific Institution of Federal Altai Scientific Center for Agrobiotechnology) department were studied to include them in the composition of a new probiotic preparation for farm animals. During the research, it was found that all strains of lactic acid rods actively fermented carbohydrates found in plant substrates and maintained their numbers not lower than a therapeutically significant level during 60 days of storage, i.e., showed high technology. Propionic acid bacteria exhibited high biological properties, i.e., they could produce vitamin B12 in amounts from 0.48 to 0.64 μg/cm3 and maintained their viability during six months of storage. As a result of research on the best manifestation of technologically valuable properties, two strains of lactic acid bacilli (SKM673 and SKM-681) and three strains of propionic acid bacteria (111, 112, 149) were selected that were promising for inclusion in the composition of a new probiotic preparation for farm animals.

Cis-trans isomerization in cyclosporin C dissolved in acetonitrile

Cyclosporin is an 11-amino acid cyclic peptide with pharmacologically valuable properties which has a variety of actual and potential applications. Its activity relies on the cell membrane permeability which, in turn, depends on the structure of cyclosporin and its ability to change the conformation. In this work, conformational exchange processes occurring in cyclosporin C were studied using one- and two-dimensional nuclear magnetic resonance spectroscopy. The free energy barrier separating two major conformers observed in polar solution (acetonitrile) was found to be 77 ± 2 kJ/mol. Less populated conformation states are also present in the solution, which agrees with the ease of formation of multiple forms revealed by MD simulations of cyclosporin C.

Nanocarbon regulation microstructure and physicochemical properties of polyacrylamide gels

Polyacrylamide (PAM) is an attractive material for the preparation of functional polymer gels due to its excellent compatibility and good viscosity. But pure PAM is difficult to obtain high mechanical properties under high temperature and strong stress, which limits their service life in applications such as water treatment, agriculture, and oil extraction. In this work, we design nanocarbon of different dimensions and sizes to regulate the microstructure of PAM weak gels (referred to as “gels”). The study found that 2D graphene oxide (GO) increased the viscosity of PAM gels by 1.7 times, while also improving the shear resistance and adhesion of PAM gels. More importantly, the aerogels formed by freeze-drying GO/PAM composite gels have the advantages of low density (19.6×10−3 g cm−3), high porosity (92.0 %), excellent thermal stability, and good adsorption (it can adsorb methylene blue dyes). These valuable properties are closely related to geometric dimensions and the number of oxygen-containing groups per unit area of nanocarbon. Therefore, this research proposes that strong cross-linking interactions are formed between nanocarbon of different dimensions and sizes with PAM, which is crucial for microstructural regulation and various physicochemical properties of gels. It provides a new entry point for our versatile design of PAM gels and broadens the application areas of crosslinked gels.

African-Descended Women: Power and Social Status in Colonial Oaxaca, 1660–1680

AbstractOn September 28, 1673, Catalina de los Reyes declared before the Royal Tribunal Court that she refused to surrender her property in Oaxaca's provincial capital of Antequera. Her land dispute with the bishop of Oaxaca shows how African-descended women navigated the court system in colonial Mexico and negotiated their social status in this Spanish colonial society. This article examines race and gender in colonial Mexico. It focuses on the ways in which local authorities attempted to confiscate one of the most valuable properties in Antequera from an African-descended woman named Catalina, as well as the strategies she used to challenge the social hierarchy in the city. By analyzing judicial records along with parish and census data, I argue that colonial women such as Catalina contested elite expectations of gender and race to redefine or secure their social status in colonial Oaxaca. My findings show that although colonial authorities marginalized African-descended women such as Catalina, these colonial women understood the judicial system in colonial Mexico, confronted authorities, and fought to retain their properties and their place in the social order. This article thus advances our understanding of the wide range of roles, experiences, and subjectivities of African-descended women in Spanish America.

Биоэкологическая характеристика уникальных природных и искусственных популяций дуба на полупустынных ландшафтах Волгоградской области

Биоэкологическая характеристика уникальных природных и искусственных популяций дуба на полупустынных ландшафтах Волгоградской области

In Ukrainian

Double phosphates compounds may possess catalytic, magnetic, electrophysical, non-linear optical properties and are used as monocrystals or polycrystals, ceramics etc. The tailor-made synthesis of double phosphates of alkali and multivalent metals is the basis for the in-depth research and investigation of physical and chemical properties, composition and structure of the compounds to be used for the development of new materials for multi-purpose use. Episodic syntheses of compounds MI3MIІMIV(PO4)3, MI2MIIMIV(P2O7)2, MI2MII(PO3)4 and МІMІІ4(РО4)33 (where МI – Li, Na, K; МIІ – Mn, Co, Ni; MIV – Zr), were made from various starting materials by the sintering method. After all, the selection of compounds for the synthesis of compounds of this type is a rather difficult task, often impossible. A systematic approach to the selection of starting reagents, temperature regime, interaction time between components are factors that can be adjusted and operated to achieve the target. The work used the method of solid-phase synthesis, after working out the synthesis method on the “model” Na2NiZr(P2O7)2. The synthesis was carried out starting from Na2CO3, NiO, CoO, ZrO2, ammonium hydro- and dihydrogen phosphate. The synthesis of compounds was carried out based on preliminary derivatographic studies of the passage of processes according to the corresponding reaction schemes. Completeness of synthesis stages was monitored at all stages using physico-chemical research methods. The DTA method confirmed the possibility of solid-phase synthesis of complex phosphate compounds that contain several transition metals – MINi2MIV(PO4)3 (where МI – Li, Na, K; MIV – Ti, Zr, Sn). The optimal temperature conditions for obtaining a number of phosphate compounds based on various starting substances for their synthesis have been found. The synthesized compounds were investigated by X-ray diffraction, DTA and IR spectroscopy, and their complete chemical analysis was carried out. The influence of a number of factors on the conditions of production of phosphate compounds of the MINi2MIV(PO4)3 (where МI – Li, Na, K; MIV – Ti, Zr, Sn) has been found. It can be assumed that the ionic conductivity in the synthesized compounds is of the “NASICON” type, and therefore the synthesized substances can be used as functional materials with valuable electro-physical properties.

Corrosion studies of various salt solutions on metals and alloys

Corrosion studies of various salt solutions on metals and alloys

Effect of Combined Methanol Extract of Mucuna Poggei and Justicia carnea Leaves on Hematological Indices and Biochemical Indices of Phenylhydrazine Induced Anaemic Albino Rats

All parts of Mucuna poggei and Justicia carnea have been known to possess valuable medicinal properties. This calls for the need to determine the effect of combined methanol extract of mucuna poggei and justicia carnea leaves on hematological and biochemical indices of phenylhydrazine induced anaemic albino rats. The study was done using 60 male albino rats. The rats were divided into five groups of five (5) rats each. Group 1 (non-anaemic) was administered water and feed only which served as Normal control. Group 2 was administered Phenylhydrazine only which served as negative control. Group 3 through 5 were Phenylhydrazine induced anaemia treated with combined extract (1:1) at 200 mg/kg, 400 mg/kg and 600 mg/kg respectively. The results showed a significant (p<0.05) increase in Hepatic and renal biomarkers (ALT, AST, ALP, Urea, Creatinine) of the anaemic (negative) control. The combined extract significantly restored the alteration through significant (p<0.05) dose dependent decrease in the assayed hepatic and renal function biomarkers. The hematological indices of the treated rats were maintained compared to the anaemic control. The study showed great potential of combined methanol extract of Mucuna poggei and Justicia carnea leaves capable of ameliorating anaemia.

НАСЛЕДУЕМОСТЬ НЕКОТОРЫХ ХОЗЯЙСТВЕННО ЦЕННЫХ ПРИЗНАКОВ У СЕЯНЦЕВ ВИНОГРАДА В ПОПУЛЯЦИИ ТАЛИСМАН х МАРКИЗА

The article presents the results of studies (2021-2022) on assessing the economically valuable properties and isolation of heterotic seedlings in the population ‘Talisman x Marquiza’. In the work of breeding new grape varieties, much attention is paid to the variety Talisman, which is highly valued as a donor of such traits as early ripeness, large berry size, downy mildew, gray rot and frost resistance. The object of the study was seedlings in the amount of 18 pcs and initial forms, in which agrobiological records were provided in accordance with 13 traits. The studies were carried out in the breeding plot of Partenit village, South Coast of Crimea. The scheme of planting grape bushes was 3 × 1.5 m, bush training – one-shouldered Guyot in the non-irrigated plot. Heredity pattern and indicators of heterosis were determined in the population according to the following traits: «bunch weight», «fruitfulness coefficient», «shoot productivity in terms of the raw bunch weight», «mass concentration of sugars». A transitional heredity pattern of «bunch weight» trait with the effect of adverse dominance of paternal form Marquiza was established in the population ‘Talisman x Marquiza’. According to this trait, the seedling № 21-11-4-39 was isolated with the effect of heterosis +1.07 %. According to the trait «mass concentration of sugars», true heterosis with the effect of +16.0 % was established in the studied family. Correspondence of the trait «fruitfulness coefficient» in initial forms and offspring was registered. Percentage content – 27.8 % of seedlings, № 21-11-4-31, № 21-11-4-37, № 21-11-4-38, № 21-11-4-49, № 21-11-4-50, heterotic according to this trait, were isolated (the effect of heterosis ranged from +22.0 % to +121.3 %). The indicator of dominance degree of shoot productivity according to the raw bunch weight trait shows a hybrid depression. Three seedlings, superior to the best form of Talisman in this indicator with the effect of heterosis from +2.96 % to +36.29 % were isolated in the population.

Features of selection of microorganisms in the composition of a new probiotic drug for farm animals

Nowadays, the idea of healthy eating is gaining popularity, which makes consumers interested in environmentally friendly and biologically nutritious animal products. In this regard, the development of probiotic preparations for farm animals and determination of the effectiveness of their use become urgent tasks. Important stages in the creation of new biopreparations are the study and selection of the most suitable strains, as the probiotic effect of the microorganisms included in the inoculum is determined by a set of technologically valuable properties they possess. In the course of the study, technologically valuable properties of 12 strains of lactobacilli and 15 strains of propionic acid bacteria from the Siberian Collection of Microorganisms (Laboratory of Microbiology of Milk and Dairy Products, Siberian Research Institute of Cheesemaking, FSBSI “Federal Altai Scientific Center of Agrobiotechnologies”) were studied in order to include them in the composition of a new probiotic preparation for farm animals. It was found that all the considered strains of lactic acid bacilli actively digested carbohydrates included in the composition of plant substrates, as well as maintained their abundance not below the therapeutically significant level for 60 days. Propionic acid bacteria produced 0.48 ± 0.01 to 0.64 ± 0.06 μg/cm3 of vitamin B12 and remained viable in numbers of tens of millions of cells for 6 months. As a result, two strains of lactic acid bacilli (SCM 673, SCM 681) and three strains of propionic acid bacteria (111, 112, 149) were selected according to the best manifestation of technologically valuable properties as promising for inclusion in the composition of a new probiotic preparation for farm animals.

Chemical Modification of Oxidized Polyethylene Enables Access to Functional Polyethylenes with Greater Reuse.

Polyethylene is a commodity material that is widely used because of its low cost and valuable properties. However, the lack of functional groups in polyethylene limits its use in applications that include adhesives, gas barriers, and plastic blends. The inertness of polyethylene makes it difficult to install groups that would enhance its properties and enable programmed chemical decomposition. To overcome these deficiencies, the installation of pendent functional groups that imbue polyethylene with enhanced properties is an attractive strategy to overcome its inherent limitations. Here, we describe strategies to derivatize oxidized polyethylene that contains both ketones and alcohols to monofunctional variants with bulk properties superior to those of unmodified polyethylene. Iridium-catalyzed transfer dehydrogenation with acetone furnished polyethylenes with only ketones, and ruthenium-catalyzed hydrogenation with hydrogen furnished polyethylenes with only alcohols. We demonstrate that the ratio of these functional groups can be controlled by reduction with stoichiometric hydride-containing reagents. The ketones and alcohols serve as sites to introduce esters and oximes onto the polymer, thereby improving surface and bulk properties over those of polyethylene. These esters and oximes were removed by hydrolysis to regenerate the original oxygenated polyethylenes, showing how functionalization can lead to materials with circularity. Waste polyethylenes were equally amenable to oxidative functionalization and derivatization of the oxidized material, showing that this low- or negative-value feedstock can be used to prepare materials of higher value. Finally, the derivatized polymers with distinct solubilities were separated from mechanically mixed plastic blends by selective dissolution, demonstrating that functionalization can lead to novel approaches for distinguishing and separating polymers from a mixture.

A Review on Phytochemical Constituents and Pharmacological Activities of Buchanania lanzan Sprang., Millettia peguenensis Ali., Evolvulus alsinoides L.

In this study, Buchanania lanzan sprang.,Millettia peguenensis Ali., and Evolvulus alsinoides L. were analyzed in terms of phytochemical composition, distribution, and ethnomedicinal uses. These plants are used in Ayurveda, Unani, and Chinese medicine as ethnomedicine. Plants have numerous properties, such as antioxidants, antibiotics, anti-bacterial, anti-ulcer, anti-inflammatory, antistress, and antidiabetic. In this review, we intend to demonstrate the phytochemical constituents, as well as the traditional medicinal uses of these herbs. Based on a comprehensive review of various research papers and literature available on these three plants, as well as the present research done by us, we have tried to compile information regarding Buchanania lanzan sprang.,Millettia peguenensis Ali., and Evolvulus alsinoides L.. Various scientific databases were used to find information on the anti-diabetic properties of B. lanzan, M. peguensis, and E. alsinodes, like Scopus, PubMed, ScienceDirect, and Google Scholar. Different parts of the plants were examined for their phytochemical, toxicological, antioxidant, antidiabetic, antiinflammatory, antistress, and many more. They contain a number of phytochemical compounds, including flavonoids, saponins, alkaloids, tannins, terpenes, and glycosides, which are responsible for their ability to treat diabetes, wounds, and oxidative stress. A crude extract of the different parts has valuable bioactive properties and could have ethnopharmacological relevance for managing different kinds of diseases. These phytoconstituents can be used in the formation of drugs.

In-Vitro Antioxidant Potential of Beta-Sitosterol: A Preface.

Introduction Beta-sitosterol, a plant sterol, has been linked to antibacterial and antinociceptive effects. Plant sterols exhibit valuable medicinal properties, including anti-adhesive activities. The dietary composition of sterols includes carbohydrates, lipids, proteins, and various minerals, along with beneficial reinforcements like essential nutrients. Methodology This study primarily aims to evaluate the antioxidant potential of beta-sitosterol through assessments using diphenylpicrylhydrazyl (DPPH), hydrogen peroxide (H2O2), and total antioxidant assays. Results The investigation into beta-sitosterol's antioxidant properties revealed a positive correlation between its concentration and antioxidant activity. Similar trends were observed in the present study, indicating an increase in antioxidant activity at lower concentrations. Discussion and conclusion Our findings demonstrate that beta-sitosterol exhibits significant antioxidant activity in the tested samples. These results highlight beta-sitosterol's potential as a potent antioxidant and contribute to our understanding of its beneficial effects.

All Shades of Green: The Anatomy of the Fridays for Future Movement in Italy

The Fridays for Future (FFF) movement has emerged as a critical force in environmental activism in response to pressing climate challenges. Despite its global prominence, few studies have delved deeply into the internal lines of thought within FFF communities. Our research fills this gap by exploring the diverse perspectives within the Italian FFF community and how these viewpoints influence the movement’s civic and political dedication to environmental sustainability. We are specifically interested in the shades of green, namely the internal variations of attitudes and beliefs of the FFF participants. We conducted empirical research with over 300 climate activists from the FFF movement in Italy, collecting data from March to October 2022 using a Web-based respondent-driven sampling technique (webRDS). The questionnaire, comprising 27 questions, covers topics such as political values, institutional trust, technological attitudes, climate knowledge, and personal lifestyles. We chose Multiple Correspondence Analysis (MCA) for our analysis due to its valuable mathematical properties, capability for producing insightful visual representations, and efficient computational features. The analysis reveals four distinct groups within the Italian FFF community based on their attitudes and actions related to environmental sustainability. These groups include Activist Equalizer, Disillusioned Technophobes, Institution Trustee, and Laissez-faire Solitaries, challenging the prevailing notion that FFF activists solely fit the profile of Activist Equalizers often depicted in media and public discourse. Findings offer a novel picture of the FFF movement in Italy and contribute to a better understanding of how the internal diversity of FFF impacts the efficacy and future trajectory of environmental activism. This research offers new insight into the political role of FFF and its potential influence on climate-related political actions.

Easy-to-prepare graphene-based inkjet-printed electrodes for diclofenac electrochemical sensing

Inkjet-printed electrodes (IPEs) from flexible Kapton® as substrate and easy to prepare graphene oxide (GO)-based inks (K/GO) were prepared using a standard desktop printer. Subsequently, they were submitted to a post-processing thermal treatment (K/GO_TR400) and assessed as disposable working electrodes (WEs) for diclofenac (DCF) indirect electrochemical detection at pH 7.0 (close to physiological pH value). DCF monitoring is attracting much interest, due to its classification as contaminant of emerging concern in water sources. The performance of the printed active sensor material was compared to that of thermally reduced (at 400 °C) graphene oxide (TRGO-400, in a powder form), which has been successfully used as glassy carbon electrode (GCE) modifier for the detection of DCF. This electrode worked linearly within the concentration range between 5 and 25 μM with an LOD value of 2.25 μM. Moreover, the morphology and chemical composition of the obtained IPEs were characterized by means of scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) and compared with GCE/TRGO-400. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) measurements using a miniaturized 3-electrode cell of the post-processed IPEs showed a promising electrochemical performance for DCF sensing. Thus, this study demonstrated the effective partial recovery of the valuable properties of graphene on the IPEs after the thermal treatment and the successful production of flexible and disposable electrodes for target analyte detection. Therefore, this is a promising alternative to conventional modified GCEs, as it offers a facile approach for the fabrication of cutting edge graphene-based electrodes and widens the available portfolio of electrochemical sensors towards detection of water contaminants of emerging concern.

Psychometric Properties of the Greek Version of the Connor-Davidson Resilience Scale (CD-RISC-10) in a Sample of Nurses.

Resilience has been defined as one's ability to maintain a mental health state and overall well-being when undergoing grave stress or facing significant adversity. Numerous resilience-investigating research tools have been developed over the years, with the Connor-Davidson Resilience Scale (CD-RISC), a self-rated tool presenting valuable psychometric properties, remaining one of the most prominent. We aimed to translate and validate the brief CD-RISC-10 in a convenience sample of 584 nurses in Greece's secondary and tertiary health care system. We conducted a confirmatory factor analysis and known-groups validity test and estimated the reliability of the CD-RISC-10. Our confirmatory factor analysis revealed that the scale had a unifactorial structure since all the model fit indices were very good. Moreover, the reliability of the CD-RISC-10 was very good since the acquired Cronbach's alpha and McDonald's omega were 0.924 and 0.925, respectively. Therefore, the Greek version of the CD-RISC-10 confirmed the factor structure of the original scale and had very good validity and reliability.

ИЗМЕНЕНИЕ ПРОДУКТИВНОСТИ И ЭЛЕМЕНТОВ СТРУКТУРЫ РАСТЕНИЙ В ПРОЦЕССЕ ГИБРИДИЗАЦИИ ВЕТВЯЩЕЙСЯ И ОГРАНИЧЕННОВЕТВЯЩЕЙСЯ ФОРМ ГРЕЧИХИ

Varieties and hybrid populations with original economically valuable properties are involved in the process of hybridization. Particular attention is drawn to such features as limited branching, high productivity, short stems, early maturity. In order to transfer the positive properties and qualities of the new (2009) shorter, restrictedly branching form of buckwheat, in 2013 a crossing with a branching one was carried out. Plants were obtained that had a larger number of branches compared to parental pairs, different heights of their placement on the stem, and increased productivity. The weather and climatic conditions of the growing season in the years of the study varied significantly: 2018 is dry (HTC = 0.5), 2019 is favorable (HTC = 0.9), 2020 is with heavy precipitation against the background of low temperatures (HTC = 1.2 ). The dominance of the trait "limited branching" and high branching on the stem was noted only in hybrid 234. In the sample of this combination, 50% of plants were found in which branching begins from the fourth and 15% of plants from the fifth internode. An analysis of the relationship between the architectonics of hybrid plants and their productivity revealed that the most productive were plants in which the first primary branch was laid on the second and third internode of the stem. The high productivity of hybrid combinations is formed due to the increased number of inflorescences (37-81 pcs) and seeds (206- 385 pcs) per plant. Correlation analysis of the relationship between the total number of branches and the number of grains matured on them showed a stable positive relationship between these features in the first and second groups: r = 0.9 and r = 0.7. In the third group, the interdependence is weaker - r = 0.4. In further breeding work with these hybrids, it is necessary to select plants with the establishment of the first primary branch on the second and third internodes, taking into account their high productivity.

3D-graphene hydrogel and tungsten trioxide-MnO2 composite for ultra-high-capacity asymmetric supercapacitors: A comparative study

Researchers worldwide use graphene extensively in its powder form for various applications such as supercapacitors, solar cells, drug delivery, and polymer composites, owing to its considerably valuable properties. However, relatively few studies have been made on the 3D-hydrogel form of graphene for these applications. Here we report a simple and fresh method to prepare 3D graphene hydrogel (3DGH) and its bimetal composite with tungsten trioxide (WO3) and manganese dioxide (MnO2). The structure of 3DGH and its composite is confirmed by advanced characterization techniques viz. Raman Spectroscopy, X-Ray diffraction (XRD), Fourier-transformed infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and tunneling electron microscope (TEM). Further, two symmetric devices using 3DGH, 3DGH-metal composite (3DGHMC), and one asymmetric 3DGHMC-3DGH device are comparatively studied using two electrode systems. The effects of scan rates, current densities, voltage window, and frequency were examined for each device by cyclic voltammetry (CV), galvanic charge-discharge (GCD), and Electron impedance spectroscopy (EIS). The asymmetric device showed a high specific capacitance of 657 F g−1 with an excellent energy density of 48.25 W h kg−1 and a high-power density of 596.06 W kg−1 at the current density of 1 A g−1. Also, the asymmetric device retains 100 % of its initial capacitance after 1000 charging-discharging cycles, also extends its stability after 1000 cycling test. Moreover, the quantitative analysis of the device is also made by Dunn's method to evaluate the percentage contribution from surface and diffusion capacitance.

Language, Religion and Culture as Tools for Peaceful Co-Existence: A Case Study of South-Western Nigeria

Nigeria and the world at large has experienced series of conflicts which have led to killing of innocent citizens and wanton destruction of valuable properties. Despite all efforts made at proffering solutions to conflicts and violence, Nigeria is yet to achieve the intended resolution. This paper focuses on investigating the use of language, religion and culture in generating a peaceful co-existence among the people of south-western Nigeria. In this research article, it was uncovered that the intended peak of conflict resolution in Nigeria is yet unattained. The research article was based on social exclusion theory and adopted a survey research design. A structured questionnaire was used to collect data from a total of 180 respondents. Data were analyzed with the use of descriptive statistics. It is expected that the research article will help Nigerians to resolve their internal conflict through the appropriate use of language, culture and religion.

New early ripe variety of fiber flax Strizh for the conditions of the North-West of Russia

The purpose of the research is a comprehensive assessment of the main breeding valuable traits and properties of a new fiber flax variety Strizh on the basis of breeding variety testing. The studies were carried out on sod-weakly podzolic well-cultivated soil in the conditions of the North-West of Russia (Pskov region) in 2018-2020. The most favorable hydrothermal conditions of the growing season for the growth and development of fiber flax were in 2019 (HTC = 1.53; Ij = +1.57), unfavorable – in 2018 (HTC = 0.95; Ij = -0.80). The Strizh variety is a high-yielding in flax fiber early-ripening type (the growing season is 69 days) matures 2-3 days earlier than Dobrynya standard variety. The average yield of flax fiber over the years of the research is 18.6 c/ha, which significantly exceeds the standard variety by 2.3 c/ha or 14.1 % (LSD05 - 0.90 c/ha), maximum yield is 20.3 c/ha. In terms of seed yield, it was inferior to the standard (9.9 c/ha) by 1.8 c/ha or 18.2 %. The new variety is highly resistant to lodging (5 points) and fusarium wilt (85 %). It has a very high flax fiber content in the stems (40.0...40.6 %), which is 3.1...4.8 % (abs.) higher than the standard, and its better quality (strength and flexibility). In production conditions, it provided the production of 19.5 c/ha of flax fiber, that is 2.3 c/ha or 13.4 % higher than the standard (LSD05 = 0.96 c/ha). It has the highest yield under contrasting conditions (genetic flexibility) – 19.3 c/ha and higher stress resistance (-2.0). The Strizh variety and the standard are characterized by low variability of fiber flax yield (CV = 9.8-9.6 %), they are also distinguished by high plasticity (bi = 1.12-1.17), which indicates a good responsiveness of these varieties to improved environmental conditions. The Strizh variety has been in the state variety testing since 2021.