11 research outputs found
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
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 Î»max=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%