نتایج جستجو برای: nonadecane
تعداد نتایج: 48 فیلتر نتایج به سال:
The aim of the research was to determine effects top-pruning time on flower yield, rose oil content and constituents in oil-bearing rose. Five-year old plants were top-pruned three different dates starting from 15 March (early), 30 (middle) ending April (late) before they started new growth spring. In addition, non-pruned (untreated) parcels used as controls. Top pruning significantly affected ...
Abstract A numerical analysis of the thermocapillary-driven melting phase change materials (PCMs) in weightlessness is presented. The explored for different PCMs with moderate temperatures, due to their potential thermal control space applications. We consider three alkanes — n-octadecane, n-nonadecane, and n-eicosane gallium. Results are discussed terms dimensionless Stefan (Ste) Marangoni (Ma...
The ability of aerosol particles to take up water before supersaturated activation is defined as hygroscopic growth. The particle hygroscopic growth factor (HGF) is required for calculations of aerosol optical properties. To represent HGF in real environments, it is desirable to initialize a thermodynamic water uptake model with ambient aerosol measurements. The assumptions needed to adapt meas...
We tested different alga-bacterium-archaeon consortia to investigate the production of oil-like mixtures, expecting that n-alkane-rich biofuels might be synthesized after pyrolysis. Thermosipho globiformans and Methanocaldococcus jannaschii were cocultured at 68°C with microalgae for 9 days under two anaerobic conditions, followed by pyrolysis at 300°C for 4 days. Arthrospira platensis (Cyanoba...
گل محمدی با نام علمی Rosa damascena Mill. در مناطق مختلف ایران کشت میگردد. امکان تولید اسانس و گلاب از آن در سطح وسیع وجود دارد. اسانس این گیاه در صنایع عطرسازی، آرایشی و غذایی مصرف گسترده ای دارد. در این تحقیق، استخراج دو نمونه اسانس گل محمدی شهرستان کاشان که به روش تقطیر با آب و به صورت آزمایشگاهی و صنعتی تهیه شده بود، توسط دستگاه های کروماتوگرافی گازی (GC) و کروماتوگرافی گازی متصل به طیف س...
the seasonal variation of volatile oil compositions (vocs) from fresh flowers of persian musk rose was investigated by combi pal headspace techniques. in this study, a total number of 21 vocs were detected by headspace on the combi pal system and gas chromatography-mass spectrometry (hs-gc/ms) from rosa moschata herrm. at different seasons which was representing 92.53-99.37% of total vocs. the ...
Introduction: With increasing resistance to overuse of synthetic chemical antibiotics, it is necessary to find alternative drugs that have both antibacterial and minimal side effects. The aim of this research is the effect of different types of solvents on the extraction of effective antibacterial agents of the plant and the identification of chemical compounds of Arenaria hispanica essential o...
مقدمه: جنس بابونه یا Anthemis از خانواده Asteraceae میباشند، که حدود 130 گونه از جنس آن در جهان انتشار دارند، این جنس در ایران 39 گونه گیاه علفی یک ساله و چند ساله دارد. طبق منابع روی این گونه تحقیقی صورت نگرفته است. هدف: هدف از این مطالعه، بررسی ترکیبهای شیمیایی اسانس گل و برگ گیاهAnthemis cotula L. از استان گیلان است. روش بررسی: در این بررسی نمونه در اواسط خرداد 1384 از رودبار در استا...
Background:Because of the increasing prevalence of fungal infections and antifungal resistance, researchers are seeking new antifungal medications and alternatives. This study aimed to assess the antifungal properties of Myrtus communis L. essential oil and hydroalcoholic extract on Candida species isolated from clinical specimens. Methods: A total of 65 Candida species isolated from clinical ...
The seasonal variation of volatile oil compositions (VOCs) from fresh flowers of Persian Musk rose was investigated by Combi PAL Headspace Techniques. In this study, a total number of 21 VOCs were detected by headspace on the Combi PAL System and gas chromatography-mass spectrometry (HS-GC/MS) from Rosa moschata Herrm. at different seasons which was representing 92.53-99.37% of total VOCs. The ...
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