다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

Elements Of X Ray Diffraction

The synthesis of nanoparticles has become a matter of great interest in recent times due to their various advantageous properties and applications in a variety of fields. The exploitation of different plant materials for the biosynthesis of nanoparticles is considered a green technology because it does not involve any harmful chemicals. In this study, iron oxide nanoparticles (Fe3O4-NPs) were synthesized using a rapid, single step and completely green biosynthetic method by reduction of ferric chloride solution with brown seaweed (BS, Sargassum muticum) water extract containing sulphated polysaccharides as a main factor which acts as reducing agent and efficient stabilizer. The structural and properties of the Fe3O4-NPs were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray fluorescence spectrometry (EDXRF), vibrating sample magnetometry (VSM) and transmission electron microscopy. The average particle diameter as determined by TEM was found to be 18 ± 4 nm. X-ray diffraction showed that the nanoparticles are crystalline in nature, with a cubic shape. The nanoparticles synthesized through this biosynthesis method can potentially useful in various applications.

https://www.mdpi.com/1420-3049/18/5/5954/pdf

Green biosynthesis and characterization of magnetic iron oxide (Fe₃O₄) nanoparticles using seaweed (Sargassum muticum) aqueous extract.

Green biosynthesis and characterization of zinc oxide nanoparticles using brown marine macroalga Sargassum muticum aqueous extract

https://digitalcommons.fiu.edu/cgi/viewcontent.cgi?article=1181&context=cas_bio

Screening of cyanobacteria and microalgae for their ability to synthesize silver nanoparticles with antibacterial activity.

Inflammatory periodontal disease caused by dental plaque is characterized by the clinical signs of inflammation and loss of periodontal tissue support The mechanical removal of this biofilm and adjunctive use of antibacterial disinfectants and antibiotics have been the conventional methods of periodontal therapy But the removal of plaque and the reduction in the number of infectious organisms can be impaired in sites with difficult access The possibility of development of resistance to antibiotics by the target organism has led to the development of a new antimicrobial concept with fewer complications Photodynamic therapy (PDT) involves the use of low power lasers with appropriate wavelength to kill micro organisms treated with a photosensitizer drug PDT could be a useful adjunct to mechanical as well as antibiotics in eliminating periopathogenic bacteria

Antimicrobial photodynamic therapy: An overview

It has been know that silver and its compounds have strong inhibitory and microbicidal activities for bacteria, fungi, and virus. Compared with other metals, silver exhibits higher toxicity to microorganism while it exhibits lower toxicity to mammalian cells. More recent advancement in researches on metal nanoparticles, silver nanoparticles (SNPs) has lot of scope for health care products such as burn dressings, scaffolds, water purification systems, antimicrobial applications and medical devices. Few researches focus for agriculture application. Hence, many people tried to synthesis SNPs with a variety of synthesis methods including chemical reduction, electrochemical techniques, photochemical reactions, and now a day via green chemistry route. Use of plants and microbes in synthesis of SNPs is quite novel method as it coast effective and environmental friendly and easily scaled up for large scale synthesis. In this chapter we highlighted about the various plants, bacteria, fungi and actinmycetes used in this process, synthesizing methodology; nanoparticles size, shape, and their application as antimicrobials in in elaborate manner. We also highlighted the basic mechanism by which SNPs interact with microbes and future recommendations.

Bionanoparticles: synthesis and antimicrobial applications

There have been impressive developments in the field of nanotechnology in the recent past, with numerous methodologies formulated to synthesis bionanoparticles using plants. Currently, there is a growing need to develop environmentally benign nanoparticles synthesis processes that do not use toxic chemicals in the synthesis protocol. We report the use of marine algae Padina pavonica (Linn.) thallus broth in the extra cellular synthesis for bio-silver nanoparticles. The biosynthesized silver nanoparticles were characterized with UV-vis Spectroscopy, FTIR, XRD, SEM and TEM. The thallus extract as well as silver-based nanoparticles of marine alga, P. pavonica (Linn.) were tested against two important pathogens of cotton. Fusarium wilts (Fusarium oxysporum f.sp. vasinfectum) and bacterial leaf blight (Xanthomonas campestris pv malvacearum) are responsible for significant yield losses in cotton worldwide. The P. pavonica based silver nanoparticles inhibited the growth of the test pathogens (12.33±0.33 mm and 10.33±0.33 mm for F. oxysporum and X. campestris respectively). This novel highly stable spherical polydispersed bionanoparticle has synthesized using simple environmental friendly green method, can be used for the management of cotton phytopathogens.

/pdf/silver-nanoparticles-biosynthesis-using-marine-alga-padina-2h624vkeju.pdf

Silver nanoparticles biosynthesis using marine alga padina pavonica (linn.) and its microbicidal activity

Impact of thickness on vacuum deposited PbSe thin films

We report that the jet nebulizer spray coating is a promising route to acquire ruthenium doped molybdenum trioxide (RuMoO3) thin films for the P–N diode application at 500 °C. The influence of Ru doping (0, 3, 6 and 9 wt%) on structural, optical, dc electrical conductivity and diode properties of MoO3 was measured by various techniques. From the X-ray diffraction analysis, the films were polycrystalline with an orthorhombic structure of MoO3. The scanning electron microscope images displayed the dissimilarities of the sub-microsized plate-like structure. The elements of Ru, Mo and O presence were confirmed by the energy dispersive X-ray spectroscopy analysis. From the ultraviolet–visible analysis and current–voltage (I–V) characterization, 6 % Ru doped MoO3 film exhibited minimum absorbance in the visible region and maximum conductivity. The diode measurements were taken in darkness and under halogen light source. To calculate the diode parameter values of ideality factor (n), barrier height (Φb) and sheet resistance (Rs), we have used different methods of I–V, Cheung’s and Norde.

S. Rajesh

Papers

Antimicrobial photodynamic therapy: An overview

Bionanoparticles: synthesis and antimicrobial applications

Silver nanoparticles biosynthesis using marine alga padina pavonica (linn.) and its microbicidal activity

Impact of thickness on vacuum deposited PbSe thin films

Structural, optical and electrical properties of Ru doped MoO3 thin films and its P–N diode application by JNS pyrolysis technique