Mapping (Dis-)Information Flow about the MH17 Plane Crash

Digital media enables not only fast sharing of information, but also disinformation. One prominent case of an event leading to circulation of disinformation on social media is the MH17 plane crash. Studies analysing the spread of information about this event on Twitter have focused on small, manually annotated datasets, or used proxys for data annotation. In this work, we examine to what extent text classifiers can be used to label data for subsequent content analysis, in particular we focus on predicting pro-Russian and pro-Ukrainian Twitter content related to the MH17 plane crash. Even though we find that a neural classifier improves over a hashtag based baseline, labeling pro-Russian and pro-Ukrainian content with high precision remains a challenging problem. We provide an error analysis underlining the difficulty of the task and identify factors that might help improve classification in future work. Finally, we show how the classifier can facilitate the annotation task for human annotators

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Simultaneous assaying of famotidine, calcium carbonate and magnesium hydroxide in the extemporaneously prepared suspension

INTRODUCTION: The share of extemporaneously prepared drugs on the pharmaceutical  market  has been on the increase lately. The suspension of famotidine with calcium carbonate and magnesium hydrox- ide is one of such drugs.AIM: The aim of our study is to develop the assay methods for each component in the simultaneous sample of the suspension in order to decrease the volume of the medical form and the time for  analysis.MATERIALS AND METHODS: The object of study is the extemporaneously prepared suspension with the content of active substances per 5 ml: famotidine 10 mg; calcium carbonate 400 mg; magnesium hydrox- ide 120 mg. Tablets with famotidine content (20 mg) were used for suspension   preparation.The substance of famotidine was used as the working standard sample (WSS). The `Evolution 60S` spectro- photometer, the AB 204 S/A Mettler Toledo analytical balances, class A measuring vessels as well as reagents that meet the requirements of the State Pharmacopeia of Ukraine were used in the   study.RESULTS: Complexometric titration for calcium carbonate and magnesium hydroxide using murexide and Eriochrome Black T as indicators and UV-spectrophotometric determination of  famotidine at  λmax=265 nm wavelength were carried out in the simultaneous sample of the suspension. The metrological character- istics confirm the correctness of the proposed  methods.CONCLUSIONS: The developed methods can be used to determine the active compounds in the simultane- ous sample of the suspension. The uncertainty of the average results for calcium carbonate quantitative de- termination was 0.94%, for magnesium hydroxide - 1.14%, and for famotidine -   0.75%