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    The Change of Cyclotrichium niveum (Boiss) Manden & Scheng Essential oils and their components at the different growth stages
    (Chiminform Data S A, 2014) Inan, Memet; Kaya, Durmus Alpaslan; Vuluga, Zina; Albu, Madalina Georgina
    Cyclotrichium niveum (Boiss.) Manden.&Scheng. is an endemic species of Lamiaceae family spreading in different regions of Turkey. In order to determine the different growth stages in this species, the plant was harvested in its natural growing area for three times including the period of pre-flowering, full flowering and post-flowering. The highest rate of essential oil in plant was determined in post-flowering period (5.58 %), and this was followed by full-flowering (5.45%) and pre-flowering periods (2.83%). In all harvest periods, the main component of the essential oil was pulegone, and depending upon the development of the plant, the rate of the essential oil increased, as well. The highest rate of pulegone was determined in full-flowering period as 74.37%.
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    Collagen-essential oil spongious matrices: Thermal and enzymatic stability
    (2012) Kaya, Durmuş Alpaslan; Albu, M?d?lina Georgiana; Vuluga, Zina; Cristian, Nicolae
    The purpose of the present work was to develop and characterize some spongious matrices based on collagen and essential oils, uncross-linked and cross-linked with glutaraldehyde, obtained by lyophilization. The active components from the obtained matrices were thymbra, lavender and oregano essential oils. The components of studied essential oils were identified by GC-MS. The prepared sponges were analyzed by swelling ability, enzymatic degradation and thermal analyses. The results of this work indicated that the properties of collagen-essential oils depend on the composition of essential oils, the most stable matrix being the collagen-lavender oil one. This property allows its uses as long-term wound dressing in infected skin damages.
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    The properties of two natural zeolites modified with oregano essential oil
    (2013) Kaya, Durmuş Alpaslan; Vuluga, Zina; Nicolae, Cristian Andi; Radovici, Constantin; Albu, M?d?lina Georgiana
    The aim of this study was to prepare zeolites modified with oregano essential oil and to establish their morphological and thermal properties as well as the release ability of essential oil from zeolites. The chemical composition of oregano oil was determined by GS-MS. The crystalline structure and chemical composition of two natural zeolites were performed by X-ray diffraction (XRD) and X-ray fluorescence (EDXRF). Both natural zeolites presented similar structure with clinoptilolite type. The thermal characteristics of oregano oil, zeolites and their combination were carried out by thermogravimetric analyses (TGA). The oregano oil was loaded in zeolite in order to improve its stability. It gradually evaporated so that the percentage of oil removed after 2h from zeolites was two times lower than itself evaporation. This property allows to the natural combination between zeolite and essential oil to be used as basic material in medical, pharmaceutical, cosmetic and food industry.
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    THE PROPERTIES OF TWO NATURAL ZEOLITES MODIFIED WITH OREGANO ESSENTIAL OIL
    (Serban Solacolu Foundation, 2013) Kaya, Durmus Alpaslan; Vuluga, Zina; Nicolae, Cristian Andi; Radovici, Constantin; Albu, Madalina Georgiana
    The aim of this study was to prepare zeolites modified with oregano essential oil and to establish their morphological and thermal properties as well as the release ability of essential oil from zeolites. The chemical composition of oregano oil was determined by GS-MS. The crystalline structure and chemical composition of two natural zeolites were performed by X-ray diffraction (XRD) and X-ray fluorescence (EDXRF). Both natural zeolites presented similar structure with clinoptilolite type. The thermal characteristics of oregano oil, zeolites and their combination were carried out by thermogravimetric analyses (TGA). The oregano oil was loaded in zeolite in order to improve its stability. It gradually evaporated so that the percentage of oil removed after 2h from zeolites was two times lower than itself evaporation. This property allows to the natural combination between zeolite and essential oil to be used as basic material in medical, pharmaceutical, cosmetic and food industry.