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Sirvi Autor "Mikaelyan, A.R." järgi

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  • Pisipilt
    Kirje
    Assessment of ‘Complex–co’ preparation efficiency for some cereal crops growth stimulation
    (Estonian University of Life Sciences, 2023) Martirosyan, H.S.; Mikaelyan, A.R.; Asatryan, N.L.; Babayan, B.G.
    The problem of obtaining environmentally friendly products, which are free from unwanted compounds that are harmful for human health like residual nitrates is very actual. The solution to this problem should be started from the initial stage of crop cultivation: seed disinfection. For that goal the new organic origin preparation ‘Complex-Co’ was used. In current paper the effect of a new plant growth stimulation preparation of complex influence ‘ComplexCo’, was studied on cereal crops cultivation. It was produced by the acidic processing of winemaking waste product: the natural cream of tartar. Unlike the high risk classical organic and inorganic fertilizers, ‘Complex-Co’ preparation is based on absolutely vital compounds and can be considered ecologically safe. It contains: amino derivatives of natural tartaric acid (TA), coalmine and micro-nutrient elements, which provide the target properties and improve soil behavior. The effect of ‘Complex-Co’ preparation was studied on three common agricultural crops: barley, emmer and triticale. As a result of the experiments and field-trials it was proved as an effective preparation for root and foliar nutrition of crops. After the usage of the elaborated preparation the significant growth stimulation effect was observed for all the tested cereal crops. Also, the disinfection effect of ‘Complex-Co’ preparation was observed for the seeds of the tested plants. The preparation is being recommended for the further research of its effect on various plants cultivation in farms, greenhouses and orangeries.
  • Pisipilt
    Kirje
    Tartaric acid synthetic derivatives effect on phytopathogenic bacteria
    (Estonian University of Life Sciences, 2022) Mikaelyan, A.R.; Babayan, B.G.; Vartanyan, A.A.; Tokmajyan, H.V.
    The scientific goals of current research were devoted to targeted derivatization of natural tartaric acid (TA) for the enhancement of antimicrobial properties of it such as like the effects of them on multi-drug resistant phytopathogenic bacteria, depends to their structure features and the genetic parameters of studied microorganisms. The main utilitarian goal is to develop new class of antimicrobial biodegradable compounds with possible prospective application as moresafe alternative to traditional antibiotics applicable for: agriculture, horticulture, food industry as well as in medicine. These compounds were developed in basic research laboratory: ‘Agrarian Pesticide Creation and The Quality Control’ at National Polytechnic University of Armenia (NPUA). TA and tartrates are safe antimicrobial food additives. According to the results of in vitro studies, the synthesized cyclohexyl-, benzyl- and phenyl- derivatives of it in the form of amine complex salts (correspondently CAS, BAS and PhAS) and cyclic imides (correspondently CI, BI and PhI) are effective against the model multidrug resistant strains of Gram-negative microorganisms. Bactericidal effects of TA derivatives were demonstrated on 19 model native soil strains of phytopathogenic Xanthomonas beticola (6 strains), X. vesicatoria and Pseudomonas syringae (13 strains) representatives, which are differing in antibiotic resistance. Regarding the transformation results, the absence of transfer of resistance to TA imides and amine complex salts by plasmids, makes them promising objects for further research. Primary studies have not shown any antibacterial effect on various nonpathogenic soil bacteria (Pseudomonas chlororaphis, P. taetrolens, etc.). The described compounds are recommended for further more detailed toxicological studies.