In this study, we investigate the opportunity of using waste tire char as a cathode material for lithium-ion primary batteries (LPBs). The char obtained by carbonizing waste tires was washed with acid and thermally fluorinated to produce CFX. The structural and chemical properties of the char and CFX were analyzed to evaluate the effect of thermal fluorination. The carbon structure of the char was increasingly converted to CFX structure as the fluorination temperature increased. In addition, the manufactured CFX- based LPBs were evaluated through electrochemical analysis. The discharge capacity of the CFX reached a maximum of 800 mAh/g, which is comparable to that of CFX- based LPBs manufactured from other carbon sources. On the basis of these results, the use of waste tire char-based CFX as a cathode material for LPBs is presented as a new opportunity in the field of waste tire recycling.

The growth characterization and enzyme productivity of halotolerant microorganisms isolated from the Nakdong River estuary wetland in Korea were investigated in this study. The isolation of halotolerant microorganisms was carried out through their cultivation at 37oC for several days using a marine agar medium. After a single-colony isolation, 16 pure colonies were obtained, and phylogenetic analysis was done using 16S-based ID service in the EzBioCloud database. The isolated strains were divided into 3 phyla, 5 families, 7 genera, and 13 species. Possible industrial applications of the strains were confirmed upon testing for amylolytic, lipolytic, and proteolytic activity to confirm the possible production of hydrolytic enzymes, growth at a pH range of 5 to 9, and various salt concentrations being tested. Thirteen strains possessed at least one enzyme activity, and 5 strains possessed 2 enzyme activities. Eight strains could tolerate up to 10% NaCl concentration. This result indicated that isolated strains had shown the possible application in food and cosmetic industries. Therefore, this study would contribute to securing domestic biological resources and improving hydrolytic enzyme activity using these strains.

The characteristic of implant s llrface is the most i mportant factor in osseointegra t ion procesR , Prol i fera tion and rli ffel' entiat ion of osteoblast, a nd local factors concerning bone forma tion a l'e inflllenced by sUl' face cha racteri s tic and it al so con t l'ols bone reactlOn The purpose of this reseal'ch was to s tlldy a boll t ini t ial adhesion. prolife ration and acti vation of osteo blast to titanium surface treated wi th mac hined‘ hydroxyapat ite coating, resorba ble blast materi al blasting and a n odi zing method To attach and culture osteobl ast‘ titanium cylinder block wi th 5mm in di ameter and 5mm in height was mad e , After t l'eating the titanium surface of each bl ock with machined, hydroxyapatite coating, I'esorhable blast ma teri al blasting and anodi zed coating, i.mpllrities wel'e I'emoved and stenllzed The number of cells attached from cultul'ed osteobl ast of I'espective expel’imental groups were measured at 1, 4, 7. and 14day, Al ka line phosphatase, calcium. and inorganic phosphate concen tra ti on 0 1' cultured solution was measul'ed, Anodi zing group showed the hi ghest. and RBM treated grollp was foll owed, Machined grollp was the worst ra te of cell a ttachment and pl 미 ife ra ti o n activity, RBM t l'eated grollp s howed the high est in creasi ng on theil‘ alkaline phosphatase activi ty of 1 and " days in cultllred osteobJast to compnrc wi th othcr groups. Thc rc was no significant differe nce among other grollps , stati stically, RBM trea ted grollp showed the hi ghest rate 0 1' increa s ing on the ca lcillm apposition of 1 a nd 4 days in cllltured osteobl ast to compa re wi th other groups , The re was no s ignificant differ ence among other groups ‘ statistica lly, RBM t reated g roup showed the highest rate of inorganic phospha te apposi t ion to compare with other groups , The re was no s ignifi cant diffe rence among other groups‘ s tati stically, It suggested tha t surface modi fï cation of titani um would be profoundly effected on the attachment. proliferation and activation 0 1' osteoblast in init ial stage osseolll tegrat lOn

중성자가 조사된 흑연에 내재되어 있는 Wigner 에너지를 배출시키는 방법의 하나인 가열냉각공정의 적용 예로 DSC(미분 주사선 열량계) 측정을 통해 흑연으로부터 Wigner 에너지가 배출되는 열 배출 특성을 연구하였다. 일정온도 상승 방법 에 의한 DSC 운전에서 중성자가 조사된 흑연을 가열냉각(annealing)하는 동안 배출되는 Wigner 에너지의 총량과 처리온도에 따른 배출속도를 측정하였다. 연구로 2호기(KRR-2) thermal column 내에 위치별로 중성자의 조사량에 차이가 나는 흑연 시료를 분말로 만들어 상온에서 까지의 온도 범위에서 DSC를 운전하고 이로부터 Wigner 에너지의 배출 속도를 측정하였다. 가열냉각 동안 중성자가 조사된 흑연에서 배출되는 Wigner 에너지의 배출 특성은 가변적 활성화 에너지 속도 식으로 잘 상관시킬 수 있었다.