Bio-imaging and drug carriers for delivery have created a huge demand for crystals. Crystals are fascinating materials that have been grown for a long time but obtaining biocompatible fluorescent crystals is a challenging task. We report on the growth of fluorescent crystals using a carbon dot (C-dot) solution by a hydrothermal process. The crystallization pattern of these C-dots exhibited a unique dendritic structure having a feather-like morphology. The growth temperature and pressure were maintained at 60°C and 200 mmHg, respectively, for crystal growth. A green fluorescence (under UV light) that was observed in the C-dot solution was retained in the crystals formed from the solution. Cytotoxicity studies on Vero cells revealed the crystals to be extremely biocompatible. These fluorescent crystals are extremely well suited for biomedical and optoelectronic applications.

목적: 빛의 세기와 순목속도의 상관관계 및 빛의 세기에 따른 시력 회복시간의 차이 여부를 살펴보았다. 방법: 빛의 세기를 5단계로 구분하였으며 각 단계별로 순목속도를 측정하였고 일정한 시간동안 빛에 노출된 피검자들의 시력회복시간을 측정하였다. 결과: 피검사자 39명의 순목속도 평균은 빛의 세기별로 31.97±10.91~33.38±11.20 mm/s였고 빛의 세기와 순목속도는 유의한 상관관계가 없었으며(r=0.006) 소프트콘택트렌즈 착용 전과 착용 후의 순목속도는 유의한 차이가 없었다(p=0.351). 빛의 세기에 따른 시력회복시간을 분산분석한 결과 유의한 차이가 있었고(F=30.67, p

Unilateral neglect has been the most considerable problem that affects the functional prognosis of CVA patients. The approaches to this symptom are both remedial and compensatory approach. Remedial approach is more valuable method than compensatory approach in terms of reducing the unilateral neglect originally. One of the method of remedial approach is controlled sensory stimulation. The purpose of this study was to investigate the effects of left visual stimuli for reducing the severity of unilateral neglect. The subject was a 40-year-old male patient who had left unilateral neglect. We have put blinking light in the left space of the patient while he performed the line bisection test before and after the stimulation. As a result, the stimulation was not distinctively effective to release the neglect. For further study. it is considered that the environment when stimulating, the strength and duration of stimulation must be controlled.