Preparation of near-infrared Ag 2 S quantum dots for detection of bisphenol A in water

Micro & nano letters

article

Yanling Hu¹  Chun Deng¹  Yu He¹  Yili Ge¹  Gongwu Song¹ 

[1] Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials;Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University;Hubei Key Laboratory of Regional Development and Environmental Response

关键词: silver compounds;    organic compounds;    chemical sensors;    quantum dots;    fluorescence;    radiation quenching;    Ag2S;    near-infrared quantum dots;    bisphenol A detection;    water;    environmental samples;    quenching;    fluorescence peak;    sulphur-hydrazine hydrate complex;    glutathione-protected silver sulphide quantum dots;   

DOI  :  10.1049/mnl.2017.0199

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Background:  Radiation oncology emergencies (ROEs) are common in metastatic or locally advanced cancer accounting for a large proportion of radiotherapy indications in poor resource settings. Aim:  To review pattern, presentation and outcome of ROEs in Lagos University Teaching Hospital (LUTH) and compare with an earlier study in the northern part of the country for possible geographical variation. Setting:  A retrospective review of ROE record from 2008 to 2016 in LUTH. Method:  Demographic data, clinical presentation, treatment and outcomes were analysed using charts and frequency tables. Results:  Total of 458 cases of oncologic emergencies were reviewed. The mean age was 52.3 years with a male-to-female ratio of 1:2.2. The majority (85%) of the patients presented in stage IV, 10% stage III and 5% stage II diseases. Spinal cord compression was the commonest presentation seen in 53.9% of cases, brain metastases in 22.1% of patients and tumour haemorrhage in 22.5% of patients. Time from the onset of symptoms to treatment was between 24 and 48 h in 16.4%, > 48 h to 1 week in 64.4% and above 1 week in 19.2%. There was a complete or significant response in signs and symptoms in 77%, no improvement in 11% and 1.1% had disease progression. Conclusion:  This study showed a varied pattern of presentation in ROEs from what was obtained in northern Nigeria, with spinal cord compression being the commonest in south west Nigeria. Despite a delayed onset in treatment, radiation therapy is vital in oncology emergencies management. There is a need for accessible functional radiotherapy centres in Nigeria to combat the delays in commencing treatment.

【 授权许可】

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