Pengaruh Penggunaan Media Komik Sains terhadap Hasil Belajar Ilmu Pengetahuan Alam di Sekolah Dasar

Research which aims to view the effect of using science comic media towards learning outcome, and quantity of effect towards science learning of 2nd grade student of SD Negeri 35 South Pontianak. Research method uses nonequivalent control group design research plan, which uses Twenty multiple choice objective test as data collecting instrument. Subjects of this research are 73 2nd grade student in SD Negeri 35 in South Pontianak school year of 2015-2016. Analysis result of t-test is thitung = 1.22 and ttabel =1.997 with (α=5% and dk=67), thus hypothesis of the research is H0 which conclude learning science using science comic media had no effect towards learning outcome of 2nd grade student of SD Negeri 35 South Pontianak. Effect size of 0.29 is categorized as low which also shows learning science using science comic media had no significant effect on learning outcome of 2nd grade student of SD Negeri 35 South Pontianak

Catalysis of a 1,3-dipolar reaction by distorted DNA incorporating a heterobimetallic platinum(II) and copper(II) complex

A novel catalytic system based on covalently modified DNA is described. This catalyst promotes 1,3-dipolar reactions between azomethine ylides and maleimides. The catalytic system is based on the distortion of the double helix of DNA by means of the formation of Pt(II) adducts with guanine units. This distortion, similar to that generated in the interaction of DNA with platinum chemotherapeutic drugs, generates active sites that can accommodate N-metallated azomethine ylides. The proposed reaction mechanism, based on QM(DFT)/MM calculations, is compatible with thermally allowed concerted (but asynchronous) [pi4s + pi2s] mechanisms leading to the exclusive formation of racemic endo-cycloadducts.MINECO: Grants CTQ2013-45415-P, CTQ2016-80375-P MAT2013-46006-R, CTQ2016-81797-REDC and PCIN-2015-240 Gobierno Vasco / Eusko Jaurlaritza: Grants IT673-13 and PI-2013 57 European Commission: Grants ERC Starting-Grant St 209842 (MATRIX) and ERC PoC 713641 (ESSENS

Local Chatter or International Buzz? Language Differences on Posts about Zika Research on Twitter and Facebook

Background When the Zika virus outbreak became a global health emergency in early 2016, the scientific community responded with an increased output of Zika-related research. This upsurge in research naturally made its way into academic journals along with editorials, news, and reports. However, it is not yet known how or whether these scholarly communications were distributed to the populations most affected by Zika. Methodology/Principal findings To understand how scientific outputs about Zika reached global and local audiences, we collected Tweets and Facebook posts that linked to Zika-related research in the first six months of 2016. Using a language detection algorithm, we found that up to 90% of Twitter and 76% of Facebook posts are in English. However, when none of the authors of the scholarly article are from English-speaking countries, posts on both social media are less likely to be in English. The effect is most pronounced on Facebook, where the likelihood of posting in English is between 11 and 16% lower when none of the authors are from English-speaking countries, as compared to when some or all are. Similarly, posts about papers written with a Brazilian author are 13% more likely to be in Portuguese on Facebook than when made on Twitter. Conclusions/Significance Our main conclusion is that scholarly communication on Twitter and Facebook of Zikarelated research is dominated by English, despite Brazil being the epicenter of the Zika epidemic. This result suggests that scholarly findings about the Zika virus are unlikely to be distributed directly to relevant populations through these popular online mediums. Nevertheless, there are differences between platforms. Compared to Twitter, scholarly communication on Facebook is more likely to be in the language of an author’s country. The Zika outbreak provides a useful case-study for understanding how scientific outputs are communicated to relevant populations. Our results suggest that Facebook is a more effective channel than Twitter, if communication is desired to be in the native language of the affected country. Further research should explore how local media—such as governmental websites, newspapers and magazines, as well as television and radio—disseminate scholarly publication