An attempt was made to develop a liquid chromatography-tandem mass spectrometric (LC-MS/MS) method which is rapid, sensitive and validated for the qualitative and quantitative analysis of lutein from the Marigold petals. Linearity, specificity, sensitivity, precision, accuracy, and analyte stability were evaluated. Two multiple reaction-monitoring (MRM) transitions for each analyte were observed: 568.01 > 104.53 and 568.01 > 118.60 for lutein. The retention time of the substance was 3.22 minutes. In this study, an excellent linearity was obtained with correlation coefficient, R, higher than 0.999. The limit of detection (LOD) and limit of quantification (LOQ) were 0.0078 and 0.0240 ng/mL, respectively. This paper is one of the few studies on these subjects and represents the first application of advanced LC-MS/MS technology.

Social networking sites (SNS) are a modern form of communication used by the young people across the world. Many young people discuss on forums and exchange information, opinions on SNS. This study empirically examines the effects of consumer opinion leadership (COL) and consumer susceptibility to interpersonal influence (CSII) on young people’s tourism destinations information seeking and dissemination behavior on SNS from consumers’ point of view. The study aimed to answer the following questions: Does COL and CSII affect young people’s tourism destinations information seeking and dissemination behavior on SNS? Is there gender difference in young people’s tourism destinations information seeking and dissemination behavior on SNS? The data generated from various instruments were organized into emerging themes to validate the findings. The results indicated COL and CSII only affected tourism destinations information seeking and dissemination behaviors on SNS of young people. Gender was not supported by the research. These findings suggest that, marketing activities and tactics should be engaged to attract opinion leaders.

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This study aims to prepare in manganese ferrite/graphene oxide (MnFe2O4/GO) nanocomposites for the removal of ibuprofen drug residue from water. The synthesised nanocomposites with various MnFe2O4 content from 30–60 wt.% were characterised by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, vibrating sample magnetometer, Brunauer - Emmett - Teller specific surface area, and energy dispersive X-ray. It was found that the suitable mass ratio of MnFe2O4 in nanocomposite for ibuprofen removal was 50 wt.%. The adsorption process followed the pseudo-second-order kinetic and Langmuir isotherm model. The maximum capacity of MnFe2O4/GO was found to be 156.25 mg g−1. Accordingly, the MnFe2O4/GO could be used as an efficient adsorbent for the removal of ibuprofen from water.

Mục tiêu: Mô tả kiến thức, thực hành khi trẻ bị sốt và phân tích một số yếu tố liên quan đến việc xử trí của cha mẹ đưa con đến khám tại Bệnh viện đa khoa tỉnh Bình Dương năm 2019. Phương pháp: Nghiên cứu mô tả cắt ngang trên 445 cha, mẹ đưa con đến khám tại phòng khám Nhi, Bệnh viện tỉnh Bình Dương từ tháng 12/2018 đến tháng 04/2019, hình thức phỏng vấn trực tiếp bằng bộ câu hỏi cấu trúc soạn sẵn. Kết quả: 73,5% cha, mẹ có kiến thức đúng về nhiệt độ trẻ khi sốt, có 68,1% có kiến thức đúng về nhiệt độ cần dùng thuốc; 50,1% cha, mẹ biết rằng sốt là yếu tố có lợi cho cơ thể trẻ và chỉ 44,7% biết nếu sốt cao thì sẽ gây co giật ở trẻ. Tỷ lệ 79,8% có kiến thức đúng về lau mát hạ sốt cho trẻ. Có 24,7% biết lựa chọn đúng thuốc hạ sốt cho trẻ, 45,6% thực hành đúng về xem xét liều lượng thuốc hạ sốt dựa vào cân nặng của trẻ và có 78,7% cha mẹ sử dụng thuốc hạ sốt cho trẻ bằng đường uống. 51,1% cha mẹ tuân thủ sử dụng kháng sinh theo toa của bác sỹ và 15,5% thực hành sai là cho trẻ sử dụng kháng sinh khi trẻ bị sốt.