Sorption-catalytic material based on basalt fibers was obtained. The material has a high dynamic sorption capacity exceeding by more than a factor of 5 the capacity of analogs. The properties of the ...sorptioncatalytic material in extraction of manganese ions from water were studied. A reagent method was suggested for regeneration of the sorbent with weak acid solutions.
Properties of filtering-sorption materials based on basalt fibers and bentonite clays intended for the removal of oil products from water were studied. Optimal parameters of a feed providing the ...maximal purification efficiency with the minimal power consumption were determined.
In previous experimental studies on laboratory mice, it was shown that the activation of specific immunity by injection with sheep red blood cells (SRBCs) lessens the olfactory sexual attractiveness ...of male mice to intact female mice. However, reduced attractiveness can only decrease the reproductive efficiency of male mice under the conditions of free mating, which is not obligatory for natural populations. The goal of this work was to study the influence of immunoenhancement on the sexual behavior and reproductive output of outbred ICR male mice. Male mice either injected with saline (control group) or treated with SRBCs were kept with intact female mice for 5 days after injection. While the number of fertile copulations was almost equal in both groups, the potential (ovulated eggs) and actual (number of embryos) fecundity was significantly higher on the 3rd–5th days after injection, when a specific antibody-forming process starts and the scent of male mice becomes less attractive for female mice. Based on the previous and present data, the hypothesis is proposed that, if the quality of a nonalternative mating partner is compromised by the activation of specific immunity, a female tries to maximize its reproductive output (due to the low chance of repeated copulations). This responsibility for the next generation is reminiscent of the Bible story about Lot and his daughters, and may help to sustain specific existence under the conditions of parasitic stress.
In previous experimental studies on laboratory mice, it was shown that activation of specific immunity by injection with sheep red blood cells (SRBC) lessens males' sexual olfactory attractiveness ...for intact females. However, reduced attractiveness can decrease males' reproductive efficiency only under the conditions of free mating, which is not obligatory for natural populations. The goal of this work was to study the influence of immunoenhancement on sexual behavior and reproductive output of outbred ICR male mice. Males, either injected with saline (control group) or SRBC-treated, were kept with intact females during 5 days after injection. While the number of fertile copulations was practically equal in both groups, the potential (ovulated ova) and actual (number of embryos) fecundity was significantly higher in females having been paired off with SRBC-treated males. Main reproductive effects were registered at 3-5th day after injection, when specific antibody-forming process starts and males' scent becomes less attractive for females. On the base of previous and present data, the hypothesis is proposed that if the quality of a non-alternative mating partner is compromised by activation of specific immunity, a female tries to maximize its reproductive output (due to low chance of repeated copulation). This responsibility for the next generation is reminiscent of the Bible story about Lot and his daughters, and may help to sustain the species existence under conditions of parasitic press.
Since non-territorial mice have as good chances for reproduction as territorial mice, we suppose that low territorial compatibility is compensated by higher breeding activity. Based on the scent war ...hypothesis, proteinuria was used as the criterion of territorial compatibility for male mice. Correlation between proteinuria, assessed as the protein/creatinine ratio, and reproductive output was studied in 22 male mice. Each male was caged with two females for five days. HPLC of urinary samples showed that more than 70 per cent of the proteins lay within the range 15-20 kDa. This result is typical for the major urinary proteins (MURs) which play the key role in chemical signalling im mice. Individual variation of the protein/creatinine ratio had good repeatability in the resampled urinary samples. Male proteinuria correlated negatively with early behavioural response to females, with mating success during the first two days, and with prenatal development of the progeny. Thus, the tradeoff between scent-marking efficiency determined by MUPs and breeding efficiency equalized the reproductive success of male mice with different ability of territorial competition.
This article considers the possibilities of introducing the circular economy into various business processes in order to reduce waste and improve environmental sustainability in the conditions of ...transformational changes in the global economy. The combination of innovative approaches of the circular economy and the principles of environmental management allows business entities to reduce the costs of natural resources, improve the quality of products, and reduce the negative impact on the environment. This approach involves creating a sustainable economy where business works in harmony with nature, ensuring economic success and preserving the environment for future generations. The essence and significance of the circular economy from the standpoint of scientists, managers, and business for the sustainable development of the economic system and ensuring environmental sustainability are considered. The formation of institutional foundations (legislative acts) on the example of the EU member states for the integration of the circular economy into business is highlighted. This provided an opportunity to outline the main principles and directions of the circular economy in the business sphere in the context of global environmental security problems. An analysis of the effectiveness of the circular economy was carried out and its dynamics were considered on the example of the countries of Europe and Asia (CAGR), the city of Amsterdam. The change in the level of reuse of materials at the global level (2004-2022) and in the EU countries (2022) was evaluated as the main indicator of the effectiveness of the implementation of the circular economy in business processes. The advantages and challenges of implementing a circular economy are highlighted and the main principles of environmental management in business are defined. According to the results of the study, the possibilities of introducing a circular economy into business processes to reduce waste and increase environmental sustainability have been determined.
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•Accurate carbohydrates MD model is required for food and pharmaceutical industries.•Sucrose has four stable conformations in the solution, which confirm previous data.•Equation of ...state and transport coefficients are well reproduced by the model.•Boundary condition in Stokes-Einstein formula is changed at 40% sugar concentration.
In this work, we study the applicability of the equilibrium molecular dynamics methods for the prediction of solution structure, equation of state and transport properties of sucrose aqueous solution for various concentrations and temperatures. The OPLS-AA force field with 1.14*CM1A charge corrections is used to describe the interactions in the model. We analyze the prediction power of the model against the experimental data and simulation results, obtained previously in CHARMM, OPLS-AA, GLYCAM06 and their modifications. The glycosidic linkage conformations of sucrose in solution are found. Their independence from the sugar concentration and the appearance of the conformation region at temperatures from 283 K to 308 K are observed. Sucrose solution densities are calculated for different sugar concentrations and temperatures. The obtained viscosities and sucrose diffusion coefficients match the experimental data at low sucrose concentrations, and diverge within 41% from the experiment as the concentration increases. The change of boundary condition in Stokes–Einstein formula is observed with an increase of the sucrose concentration above 40%.
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