Bismuth based high Tc superconductors are among the materials that have been extensively appreciated in terms of their application. Since this type of superconductors are very sensitive with respect to synthesis process, here, we consider effect of synthesis process on the electrical, magnetic and superconducting properties of Pb-BSCCO compound. The samples were prepared by both solid state and sol-gel reaction. In both of the preparation routes, two different methods of Cold Press (CP) and Spark Plasma Sintering (SPS) were used to compress the samples after, the completion of their calcination and grinding. In the next step, the samples put through the thermal process of sintering with different temperatures with respect to their preparation method. The results of the measurements indicate better superconducting properties in sol-gel method compare to the solid-state method. Also, it indicates better superconducting properties in Cold Press samples with respect to the samples prepared by SPS method. To compare the sintering temperature indicates that 825 and 830 oC are suitable temperature for sol-gel and solid-state samples, respectively, in Cold Press process.

Objective: To investigate the effect of cold plasma on Staphylococcus aureus destruction at different treatment times. Materials and methods: Staphylococcus aureus was cultured on 4 plates of LB Agar medium each at 1. 5 × 103 CFU / mL (colony-forming unit per milliliter) and one group was selected as the control group and the other 3 groups were treated with plasma for 5, 7 and 10 minutes. They were incubated for 24 hours at 37 °, C. Finally, the number of colonies formed was counted. Results: It was shown that treatment with cold atmospheric plasma significantly reduced bacterial colonies and in comparison to the control plate with a colony count of 1. 5 × 10 3 CFU/mL treatment with air plasma for 10 minutes decreased the Pseudomonas colony count to zero. Conclusion: It was observed that the cold atmospheric plasma jet device manufactured in atomic Energy Organization of Iran can significantly kill bacteria in a short time. Increasing the duration of treatment significantly reduces bacterial colonies.

Cold plasma is a novel green technology and refers to an ionized gas in which a small fraction of its atoms lose one or more electrons and contains many active species such as electrons, ions, free radicals, excited states, and a large number of ionized neutral molecules. This technology is produced at low pressures and powers, and the type of gas and the method used to produce plasma determine the nature and quantity of the active species. In recent years, the use of cold plasma for reasons such as not having a negative effect on heat-sensitive materials, improving the moisture properties, increasing the surface activity, printing and coloring potential are considered by researchers in the packaging industry. Accumulation of petroleum-based plastics, which are mainly used in food packaging, is a serious environmental problem today; As a result, researchers' efforts to develop biodegradable films and coatings have increased but these materials, like polymers, do not have the surface properties required in some applications. Cold plasma can modify biopolymers and polymers by methods such as crosslinking, DE polymerization, and plasma etching. This paper investigates the applications of cold plasma in surface modification of polymers and biopolymers.

Cold plasma is a new technology which is originated from the natural phenomenon named tundra. This technology has been used for electronics devices and printing technology before using in agriculture field. It has now been researching for the vast biological area due to its effects on microorganisms, chemical compounds’ of food staffs, rheological aspects, nutrition values and organoleptic characteristics of plant and animal foods. So, several application of cold plasma in industry will be shown as a new area of consideration such as medical, wastewater treatment, and polymer technology and food science. Gas ionization process which forms other reactive chemical materials like radicals, UV light and heat, show specific effect on the process object. Plant products such as pharmaceutical plants are also a new area of scientific investigation subjects for cold plasma applications. Cold plasma in atmospheric pressure has been recorded that it can stabilize nitrogen in plants and soil. Therefore it has an important role in the fortification of plants components. Plasma-induced activation of Phyto-actuators in plants also has been recorded by plant physiology experts. The aim of this article is to review the effects of cold plasma and it will be discussed on plant components from the view of their quality and quantities. Besides its technological aspect in the pharmacological field will be explained such as active components and functional food which are important in industry.

The first laboratory use of plasma in the food industry was to study the possibility of inactivating undesirable microorganisms from the surface of heat-sensitive foods such as fresh fruits and vegetables, meat, and eggs. Plasma treatment can be considered as a potential alternative to chemicals (eg chlorine treatment) or physical methods (eg high pressure, pulsed electric field, irradiation) for surface disinfection. Advantages of using plasma processes include high efficiency at low temperatures (generally <70 ° C), instantaneous production, low impact on the internal matrix of the product, no need for water or solvent and no waste left. Plasma processing can also have several benefits, such as cleaning surfaces, increasing surface energy, improving moisture, increasing printing and dyeability, and creating very thin coatings on films used in the packaging industry.