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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Nanoanalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Catalyst,Temperature,DLC nano-structures,DC-PECVD
- چکیده:
- چکیده انگلیسی: Using DC-Plasma Enhanced Chemical Vapour Deposition (PECVD) system, the impact of pure Co on
the growth of diamond-like carbon (DLC) nano-structures were investigated. In this study, Acetylene
(C2H2) was diluted in H2 and used as the reaction gas and Cobalt (Co) nano-particles were used as
the catalyst. The effect of preparing Co catalyst at temperatures of 240°C and 350°C and growth
conditions was studied. The results showed that the Co catalyst sputtering at 350°C temperature has
a significant impact on purity, morphology, and synthesized diamond-like carbon nano-structures.
This research was conducted to investigate the effect of catalyst preparation and growth conditions.
Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy were used to
characterize the diamond-like carbon nano-structures produced under different conditions.- انتشار مقاله: 28-01-1396
- نویسندگان: Morasa Amani Malkeshi,Karim Zare,Mahmood Ghoranneviss,Zohreh Ghorannevis,Omid Moradi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Molecular and Clinical Microbiology
- نوع مقاله: Journal Article
- کلمات کلیدی: Detoxification,Mycotoxin,Penicillium,Citrinin,Cold Atmospheric Pressure Plasma
- چکیده:
- چکیده انگلیسی: Mycotoxins such as Citrinin are small toxic molecules produced by a great variety of microorganism, which encompass several classes of secondary metabolites with no common chemical structure or mode of action. Citrinin produces by different species of Penicillium. Today, the cold atmospheric pressure plasma (CAPP) method has a potential for mycotoxin detoxification. In this study, a new and promising approach involving the use of cold atmospheric pressure plasma is considered, which may overcome multiple weaknesses associated with the classical methods.
In this study, samples included wheat, corn; rice and Barley were obtained from northern parts of Iran (Lahijan). Initially, the output of the power supply was set to 50 kV, 100 watts, and the electron frequency of 30 kHz (optimal conditions to effective plasma). Then, the effect of cold atmospheric jet plasma (argon) on gas was investigated in 30, 60 and 360 seconds (gas flow rate of 6 liters per minute).
The results showed us that the cold atmospheric pressure plasma method effectively production pure mycotoxins. The rate of various mycotoxins destruction varies according to their structure. It was also shown in the study that the combination of mycotoxins in foods would reduce the plasma's effect, but not prevent them from degrading. Finally, in this study, descendants in all samples were performed successfully.
The atmospheric pressure plasma method has a natural biodegradation effect and has the least negative effect on food products in comparison with conventional methods of disinfection of food products in addition to the detoxification characteristics.- انتشار مقاله: 24-06-1396
- نویسندگان: Narges Vaseghi,Mansour Bayat,Arash Chaichi Nosrati,Mahmood Ghorannevis,Jamal Hashemi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Nano Dimension
- نوع مقاله: Journal Article
- کلمات کلیدی: Carbon nanotubes,Temperature,DC-sputtering,Ni-Co catalyst,TCVD
- چکیده:
- چکیده انگلیسی: The effect of temperature variation on the growth of Carbon Nanotubes (CNTs) using Thermal Chemical Vapor Deposition (TCVD) is presented. Nickel and Cobalt (Ni-Co) thin films on Silicon (Si) substrates were used as catalysts in TCVD technique. Acetylene gas was used in CNTs growth process at the controlled temperature ranges from 850-1000 ̊ C. Catalysts and CNTs characterization was carried out using Atomic Force Microscopy (AFM), Energy Dispersive X-ray (EDX), Field Emission Scanning Electron Microscopy (FESEM) and Raman spectroscopy. It was found that the CNTs diameters increased with the temperature. The CNTs diameters were continually increased from 70 nm to 180 nm in the temperature range. In addition, the degree of crystallinity of the grown CNTs decreased.
- انتشار مقاله: 08-09-1394
- نویسندگان: Sepideh Sadat Madani,Karim Zare,Mahmood Ghoranneviss
- مشاهده