Browsing by Author "Ciocarlan, Alexandru"

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    Effect of some essential oils on Acanthoscelides obtectus Say (coleoptera: bruchidae) and Tetranychus urticae koch, (acari: tetranychidae) adults
    (CEP USM, 2024) Muntyan, Elena; Ciocarlan, Alexandru; Kulcitki, Veaceslav; Batco, Mihail; Aricu, Aculina; Lungu, Lidia; Blaja, Svetlana; Popescu, Violeta
    In search of new and safe pesticides, the toxicity of volatile oils obtained from three plant species against Acanthoscelides obtectus and Tetranychus urticae adults was studied. The essential oils of peppermint (Mentha piperita L), rosemary (Rosmarinus officinalis L) and coriander (Coriandrum sativum L) showed higher toxicity on mites than on weevils. The peppermint and rosemary essential oils demonstrated efficacy against A. obtectus in both fumigant and acute contact toxicity tests. The peppermint and coriander essential oils had the most pronounced fumigant toxicity to mites, with LT50 of 2.5 and 3.7 h, respectively, at 5 μg/cm³ air and are the most promising sources of natural substances with acaricidal properties.
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    SYNTHESIS OF NEW HOMODRIMANE SESQUITERPENOIDS CONTAINING DIAZINE, 1,2,4-TRIAZOLE AND CARBAZOLE RINGS
    (2018) Duca, Gheorghe; Aricu, Aculina; Lungu, Lungu; Tenu, Nadejda; Ciocarlan, Alexandru; Gutu, Yacob; Dragalin, Ion; Barba, Alic
    The present paper reports on six step synthesis of 11-homodrim-6,8-dien-12-oic acid N-substituted amides containing diazine, 1,2,4-triazole and carbazole rings based on commercially available sclareolide. The mentioned compounds were prepared for the first time by interaction of the generated in situ acyl chloride with some heterocyclic amines: 2- and 4-aminopyrimidine, 2-aminopyrazine, 5-amino-1,2,4-triazole and N-aminocarbazole. Their structures were fully elucidated by elemental and spectral analyses (IR, 1H and 13C NMR).