Studia Universitatis Moldaviae Stiinte reale si ale naturii最新文献

Opportunities for use in practice of intelligent technologies in the evaluation of some biological variables 智能技术在某些生物变量评估中的实际应用机会

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_07

Ana Birsan, Veaceslav Sprincean, Ion Ganea

引用次数: 0

Synthesis of water-soluble analogs-polymers of poly-N-vinylpyrolidone grafted with zinc phthalocyanine 酞菁锌接枝聚n -乙烯基吡啶酮水溶性类似物的合成

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_23

Stefan Robu, Tamara Potlog, Ion Lungu, Petru Bulmaga, Pavel Tiuleanu, Viorel Prisacari, Veronica Sava

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Evolution of regulations in the field of fisheries, protection and use of natural aquatic biological resources 渔业领域法规的演变，自然水生生物资源的保护和利用

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_06

Dumitru Bulat, Nicolae Saptefrati, Denis Bulat, Gheorghe Avornic

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Dynamics of maize pathogens from Fusarium, Aspergillus and Penicillium genera in soil under weather conditions of Republic of Moldova 摩尔多瓦共和国气候条件下土壤中镰刀菌、曲霉和青霉属玉米病原菌的动态

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_14

Cristina Grajdieru, Elena Bylici

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Modern approaches to morphofunctional dynamics of spermatogenesis process 精子发生过程形态功能动力学的现代研究

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_20

Vladimir Sheptitskiy, Ana Leorda, Viorica Raischi, Olesea Grosul-Raileanu

{"title":"Modern approaches to morphofunctional dynamics of spermatogenesis process","authors":"Vladimir Sheptitskiy, Ana Leorda, Viorica Raischi, Olesea Grosul-Raileanu","doi":"10.59295/sum1(171)2023_20","DOIUrl":"https://doi.org/10.59295/sum1(171)2023_20","url":null,"abstract":"This paper summarises modern approaches to the morphofunctional dynamics of spermatogenesis as a complex dynamic process with well-organised cellular and molecular events, which includes three specific basic functional steps - spermatocytogenesis (mitosis), meiosis and spermiogenesis (differentiation with no cell division), and leads to sperm production. The first stage involves the differentiation of spermatogonia (small diploid germ cells) by mitotic division into primary spermatocytes. The second stage requires meiosis, in which diploid cells - spermatocytes form round haploid spermatids. The final stage of spermatogenesis involves the production of mature, motile spermatozoa from round spermatids in a process called spermiogenesis. At any of these stages, functional disorders can occur, which can lead to disruption of the whole process and infertility. To date, a comprehensive understanding of the cell biology and genetics of spermatogenesis is difficult as it takes place in a complex testicular environment, characterised by a close association of developing spermatozoa with additional cells. Therefore, it is necessary to intensify the study of the mechanisms of the morphofunctional dynamics of spermatogenesis and its regulation in general and at different stages.","PeriodicalId":30698,"journal":{"name":"Studia Universitatis Moldaviae Stiinte reale si ale naturii","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135639447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biological particulars of the sun perch – Lepomis gibbosus (linnaeus, 1758) from the Cuciurgan reservoir-cooler 库奇尔干水库冷却器中太阳鲈鱼的生物学特征- Lepomis gibbosus (linnaeus, 1758)

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_11

Mihail Mustea, Serghei Filipenco, Dumitru Bulat

{"title":"Biological particulars of the sun perch – Lepomis gibbosus (linnaeus, 1758) from the Cuciurgan reservoir-cooler","authors":"Mihail Mustea, Serghei Filipenco, Dumitru Bulat","doi":"10.59295/sum1(171)2023_11","DOIUrl":"https://doi.org/10.59295/sum1(171)2023_11","url":null,"abstract":"The sun perch was recorded for the first time at the mouth of the Dniester in 1952. In the ichthyofauna of the Cuciurgan harbor in 1965. Starting with the second half of the 1960s, it was not recorded in the Cuciurgan refrigeration lake until the 2000s. From 2004, unique specimens were recorded, which probably hit, together with the water pumped from the Turunchuk arm. The share of sun perch in the control catches of Cuciurgan Refrigerating Lake increased from 0.5% in 2008 to a record 15.7% in 2017. The high abundance of sun perch in a short period is explained by the type of portioned reproduction, high prolificacy, early age of sexual maturity and also care for offspring. In the Cuciurgan reservoir, mature sun perch females weighing 7.2 g were captured, and with a weight of 13.4 g they were identified in stage IV of gonad maturation. The sun perch of the Cuciurgan Refrigerating Lake is characterized by a high growth rate, thus the maximum standard body length is greater than 17 cm with a mass of 220 g. A polynomial model was used to approximate the sun perch abundance monitoring data of degree IV (reliability coefficient R2 = 0.8211), which determines the characteristic of rapid growth of invasive fish species, then followed for 4 years a stage of stabilization of the population, after which it is characterized by a decrease in abundance, due to the appearance of a foreign species in the tank – the mud crab.","PeriodicalId":30698,"journal":{"name":"Studia Universitatis Moldaviae Stiinte reale si ale naturii","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135639448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biological characteristics of atherina boyeri of the Kucchurgan reservoir lake 库丘尔干水库湖泊波叶红藻的生物学特性

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_12

Mihail Mustea

{"title":"Biological characteristics of atherina boyeri of the Kucchurgan reservoir lake","authors":"Mihail Mustea","doi":"10.59295/sum1(171)2023_12","DOIUrl":"https://doi.org/10.59295/sum1(171)2023_12","url":null,"abstract":"Aterina boyeri for the first time was recorded the cooling lake Cuciurgan in the 1980s. According to our assumptions, nimerind, together with the water pumped from the Turunchuk arm. Being an invasive species with a short life cycle – aterina boyeri, due to its wide ecological valence and high reproductive potential, it occupied, in a short time, a superdominant position. Currently, it is the most numerous fish species in the lake, whose share during the years 2019-2022 reaches the value of 55,3%. The growth rate and age structure of the local population has halved. Due to the high mineralization and increased thermalization of the reservoir, the aterina boyeri, being a mediterranean, thermophilic species, found a favorable ecological niche here. According to the dominance index, it belongs to the D5 category, according to the constancy index – C3, according to the environmental significance index – to the W5 category. The maximum size and weight of males is 9.4 cm and 3.9 g, and females are 9.8 cm and 4.3 g, which is smaller compared to the marine form. In the period of 2008-2022, there is an exponential increase in the population of the aterina boyeri, which can lead to the exclusion of indigenous fish species.","PeriodicalId":30698,"journal":{"name":"Studia Universitatis Moldaviae Stiinte reale si ale naturii","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135639461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of spirulina grown on wastewater on the functional status of the thyroid gland on the background experimental diabetes 以实验糖尿病为背景，研究废水中螺旋藻生长对甲状腺功能状态的影响

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_13

Iurie Bacalov, Adriana Druta, Elena Chirita, Aurelia Crivoi, Sergiu Dobrojan

引用次数: 0

Study of the adsorption processes of vitamin B6 on autochthonous carbon adsorbents 原生碳吸附剂对维生素B6吸附过程的研究

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_24

Nina Timbaliuc, Oleg Petuhov, Tudor Lupascu, Nina Boldurescu

引用次数: 0

The rate constants KOH+S with some antibiotics determination by the competetive inhibitors method KOH+S与某些抗生素的速率常数用竞争抑制剂法测定

Studia Universitatis Moldaviae Stiinte reale si ale naturii Pub Date : 2023-09-01 DOI: 10.59295/sum1(171)2023_25

Tatiana Isac-Gutul, Elena Tutovan, Denis Nika

{"title":"The rate constants KOH+S with some antibiotics determination by the competetive inhibitors method","authors":"Tatiana Isac-Gutul, Elena Tutovan, Denis Nika","doi":"10.59295/sum1(171)2023_25","DOIUrl":"https://doi.org/10.59295/sum1(171)2023_25","url":null,"abstract":"Advanced oxidation processes (AOP) are widely used for the degradation of antibiotics and other micropollutants in surface and waste waters. The degree of degradation of a drug by an AOP can be predicted from the rate constant of the interaction of hydroxyl radicals with the substrate - KOH+S value, as well as from other physicochemical properties accompanying the degradation processes, and therefore these factors are important for the design of technological schemes of treatment of polluted water. Moreover, a substrate withKOH+S value known can be used to evaluate the applicability and efficiency of AOP and elucidate the kinetics and degradation mechanism of the given pollutant. In this work, the rate of the oxidation of N,N-Dimethyl-p-nitrosoaniline (PNDMA) during the photolysis of hydrogen peroxide in distilled water and in the presence of different amounts of polluted water (aqueous solutions containing sulfonamides – acetazolamide (AC) and phthalylsulfathiazole (FL), fluoroquinilones - moxifloxacin (MOX) and ciprofloxacin (CPF) as pollutants) in the UV - H2O2 systems was studied. The concentration of the drugs varied between 2.5 mg/L and 25 mg/L. The ,,ДРТ-1000” high-pressure mercury vapor lamp as the irradiation source was used. Using competitive acceptors method and based on the kinetic curves, the interaction constants of •OH radicals with the mentioned drugs were determined: kOH+AC = 8.5 ×109 L/mol×s; kOH+FL = 8.5×109 L/mol×s; kOH+MOX = 1.42×109 L/mol×s; kOH+CPF = 6.3×109 L/mol×s and the inhibiting capacity of natural waters Σ ki[Si] in the selfpurification process in the model systems used. The calculated values of the respective constants are varies between (5.4-17.7)×106 s-1.","PeriodicalId":30698,"journal":{"name":"Studia Universitatis Moldaviae Stiinte reale si ale naturii","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135639582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0