Pengaruh Metode Demonstrasi Terhadap Hasil Belajar Siswa Pada Materi Sistem Koloid

The demonstration method is a method that can make students' attention more focused on what is being taught so that students are more active and do not feel bored in learning. This study aims to see the effect of the demonstration method on student chemistry learning outcomes on colloidal system material at SMA Negeri 1 Tutuyan in the 2020/2021 academic year. This research is a pre-experimental research with one group pretest-posttest design. The population in the study were all students of class XI IPA and the sample taken was class XI IPA MIA 1, totaling 30 people. Testing the hypothesis using the t-test formula at the significant level = 0.05. Based on the data analysis, the value of tcount = 23.90 and ttable = 2.045. The value of tcount > ttable then H1 is accepted and H0 is rejected, so it can be concluded that H1 is accepted, which means there is a significant difference between student learning outcomes on colloidal system material before and after using the demonstration method because there are differences. student learning outcomes. To find out how much the effectiveness of using the demonstration method is continued with the N-Gain test and obtained is 0.76 with high criteria.Metode demonstrasi merupakan metode yang dapat membuat perhatian siswa lebih terfokuskan kepada apa yang diajarkan sehingga siswa lebih aktiv dan tidak merasa bosan dalam belajar. Penelitian ini bertujuan untuk melihat pengaruh metode demonstrasi terhadap hasil belajar kimia siswa pada materi sistem koloid di SMA Negeri 1 Tutuyan pada tahun ajaran 2020/2021. Penelitian ini merupakan penelitian Pra-eksperimen dengan rancangan penelitian one group pretest-posttest design. Populasi dalam peneitian adalah seluruh siswa kelas XI IPA dan sampel yang diambil yaitu kelas XI IPA MIA 1 yang berjumlah 30 orang. Instrumen penelitian yang digunakan berupa tes pada siswa diawal  dan  diakhir  pembelajaran. Data dianalisis dengan menggunakan rumus t-test untuk menguji hipotesis penelitian, analisis N-Gain untuk  melihat peningkatan dari hasil belajar siswa. Berdasarkan analisis data diperoleh dari nilai pretest rata-rata 49,47 dan posttest rata-rata 87,67. Analisis hasil belajar menunjukkan bahwa hasil belajar kimia siswa pada materi sistem koloid mengalami peningkatan, analisis N-Gain diperoleh yaitu 0,76 dengan kriteria tinggi. Pengujian hipotesis yang menunjukkan bahwa thitung > ttabel , yang berarti bahwa metode demonstrasi dapat memberikan pengaruh terhadap  hasil belajar siswa

Factors affecting the choice of farmers' practices and strategies in a bacterial wilt of banana in the Bushi area, east of the Democratic Republic of Congo

Article purchasedUncertainty forces the daily lives of small farmers Bushi in eastern Democratic Republic of Congo, for over a decade after the banana bacterial wilt has literally broken the economic landscape, social, cultural and ecological region. This study attempts to highlight the socio-economic factors that influence the choice of strategies and practices of farmers face this crisis. The data, both quantitative and qualitative, were collected from 232 farmers in 16 localities of Kabare and Walungu in South Kivu in the eastern Democratic Republic of Congo. The result of the econometric analysis shows a correlation between socioeconomic factors and farmers' practices. All things being equal, factors such as age, participation in off-farm activities, experience, size of household, size, membership in the association, access to credit, possession of livestock, traumatic history, the importance of the banana and the severity of the crisis significantly influenced the choice of practices and copings strategies. These results suggest approaches and agricultural and economic stimulus programs that integrate various farmers' logic in the Bushi area to the east of the Democratic Republic of Congo

Analysis of how Dual-tasking Effects Selected Gait Variables in Older Adults with a Known Relative Power

Please view abstract in the attached PDF file

A global perspective on the influence of environmental exposures on the nervous system

Economic transitions in the era of globalization warrant a fresh look at the neurological risks associated with environmental change. These are driven by industrial expansion, transfer and mobility of goods, climate change and population growth. In these contexts, risk of infectious and non-infectious diseases are shared across geographical boundaries. In low- and middle-income countries, the risk of environmentally mediated brain disease is augmented several fold by lack of infrastructure, poor health and safety regulations, and limited measures for environmental protection. Neurological disorders may occur as a result of direct exposure to chemical and/or non-chemical stressors, including but not limited to, ultrafine particulate matters. Individual susceptibilities to exposure-related diseases are modified by genetic, epigenetic and metagenomic factors. The existence of several uniquely exposed populations, including those in the areas surrounding the Niger Delta or north western Amazon oil operations; those working in poorly regulated environments, such as artisanal mining industries; or those, mostly in sub-Saharan Africa, relying on cassava as a staple food, offers invaluable opportunities to advance the current understanding of brain responses to environmental challenges. Increased awareness of the brain disorders that are prevalent in low- and middle-income countries and investments in capacity for further environmental health-related research are positive steps towards improving human health

Teacher of Christian Religion Education, Quality of Education and the Future of the Morality of the Nation of the First

This paper aims to provide an understanding that Christian Education teachers have a significant role in improving the quality of education and the future of national morality. The development of globalization and modernization makes teachers must be ready and contribute in preparing the nation's young generation in entering the era of globalization and modernization. At least there are two roles that must be possessed by the Christian Religious Education teacher, namely participating in realizing quality education and maintaining the nation's morality. With this writing, it is expected that every Christian Education teacher will become more aware and more enthusiastic in carrying out his duties and vocation as a teacher of Christian Religious Education

Phylogenetic analysis of canine distemper virus in South African wildlife

<div><p>Canine distemper virus (CDV) causes a severe contagious disease in a broad range of hosts. This is the first study to genetically characterise CDV strains from four different wildlife species in South Africa. The phylogenetic diversity of CDV is examined, using the haemagglutinin gene. The South African wildlife CDV isolates showed a high degree of similarity to CDV in South African domestic dogs. Phylogenetic analyses confirmed the presence of 12 geographical lineages with CDV strains from South African wildlife falling within the Southern African lineage. The study reveals two possible co-circulating sub-genotypes corresponding to the northern and southern regions of South Africa respectively. CDV strains from the non-canid species were distinct, but similar to CDV isolates from domestic dog and wild canids. Residues at amino acid sites of the SLAM binding region support the notion that CDV strains encoding 519I / 549H are better adapted to non-canid species than canid species. The amino acids present at site 530 are conserved regardless of host species. Strains from South African wild carnivores showed no difference between host species with all strains presenting 530N. All non-canid strains in this study presented the combination 519I/549H. No evidence of host adaptation or lineage grouping was observed for the Nectin-4 binding region. Further studies should include CDV strains isolated from various hosts from a wider geographical range in South Africa.</p></div