Bedbugs are harmful human blood-sucking ectoparasites. The disadvantages of a bedbug bite cause itching, redness bumps, secondary infections, and anemia in children. Bedbugs controller so far uses harmful chemical pesticides, but reappearance of bedbugs indicates less effective chemical pesticides, and becomes a serious problem. So it needs safer controller for human health. This study aims to analyze the d-Limonene activity of orange peel (Citrus sinensis L.) in controlling the bedbug infestation (Cimex cimicidae). The study was conducted through 5 stages: d-Limonene isolation, GC-MS characterization, bioassay Y test d-Limonene nanoparticles, SEM characterization, and d-Limonene activity test on bedbug. The results showed that the essential oil of orange peel contained the main compounds as d-Limonene (90.018%), 1,6-Octadien-3-ol, 3,7-dimethyl- (3,017%), β-Myrcene (2.071%), Octanal (0.349%), 1-Octanol (0.589%), 1R-α-Pinene (0.688%), 6-Octen-1-ol, 3,7-dimethyl- (0.667%), 3-Cyclohexene-1- methanol, α, α, 4-trimethyl-, (S) - (1.453%), and Bicyclo [3.1.1] heptane, 6.6-dimethyl-2-methylene-, (1S) - (1.147%). The Bioassay Y test shows that d-Limonene was both repellent and fumigant, d-Limonene nanoparticles had uneven and irregular surface morphology, and in the flea activity test showed more than 50% bedbugs death. These research concluded that d-Limonene compounds from sweet orange peel had activity to control the bedbugs.
Th e study aims to develop a portfolio assessment to measure the student's skill of using primary source evidence in historical learning. Th e portfolio assessment was developed based on Seixas' concept of historical thinking. Th e portfolio assessment consists of essay test and interview guide, which has proved to be valid and reliable. Th e developed portfolio assessment can be used to depict the student's skills to organize information from historical documents or other written resources, and then reconstruct it as historical narratives. Th e developed portfolio assessment can be posited as an alternative evaluation mode for history teachers.
Knowledge sharing terbentuk ketika setiap anggota dalam organisasi saling berbagi pengetahuan secara bersama-sama untuk mengungkapkan pendapat, ide, kritik dan komentar kepada anggota lainnya. Universitas Gunadarma menjadi salah satu perguruan tinggi yang sudah menerapkan pembelajaran kolaborasi cloud meeting dan UGTV selama pandemi Covid-19 sehingga terjadi peningkatan knowledge sharing menggunakan Whatsapp dan Line. Penelitian ini bertujuan untuk menganalisis faktor pendukung knowledge sharing dalam komunitas mahasiswa Universitas Gunadarma dengan menggunakan media Whatsapp dan Line grup selama pandemi Covid-19. Metodologi penelitian ini adalah kuantitatif dengan menggunakan perangkat lunak Structural Equation Modeling (SEM), AMOS dan Teori Computer Mediated Communication untuk menganalisis data yang dikumpulkan menggunakan kuesioner dengan skala likert 1-5 kepada mahasiswa Universitas Gunadarma. Populasi penelitian adalah mahasiswa Fakultas Ilmu Komunikasi Universitas Gunadarma dan sampel penelitian adalah 741 responden yang terdiri dari laki-laki dan perempuan berusia 18-24 tahun. Teknik sampling menggunakan metode purposive sampling dengan kriteria mahasiswa Universitas Gunadarma yang rutin melakukan knowledge sharing. Hasil analisis SEM menunjukkan bahwa terjadi interaksi sosial dan ekspektasi hasil memengaruhi knowledge sharing untuk memenuhi kebutuhannya akan pengetahuan, dan kegunaan komunitas memengaruhi niat berbagi pengetahuan secara terus menerus. Sedangkan interaksi sosial tidak berpengaruh terhadap kebermanfaatan mahasiswa dan knowledge sharing tidak berpengaruh terhadap niat berbagi pengetahuan secara berkelanjutan. Pembatasan jarak yang diberlakukan oleh pemerintah sebagai akibat Pandemi Covid-19 menjadikan grup Whatshapp dan grup Line menjadi penting dan berguna dalam mencari dan berbagi ilmu di kalangan mahasiswa.
Penelitian ini bertujuan untuk mengetahui pengaruh latihan shuttle run terhadap hasil dribble bola basket siswa kelas X SMA Negeri 1 Sekayu. Penelitian ini menggunakan metode eksperimen dengan desain Quasi Experimental Design dengan menggunakan pretest posttest randomized control group. Sampel yang digunakan berjumlah 60 siswa, setelah itu dibagi menjadi dua kelompok yaitu 30 siswa kelompok eksperimen dan 30 siswa kelompok kontrol. Kelompok eksperimen diberikan perlakuan latihan shuttle run sedangkan kelompok kontrol tidak diberi perlakuan. Teknik analisis menggunakan metode uji “t”. Setelah melakukan latihan dan dilakukan posttest, terjadi peningkatan rata-rata sebesar 5,2 untuk kelompok eksperimen dan kelompok kontrol hanya mengalami penurunan sebesar 1,15. Serta hasil hipotesis menunjukkan nilai thitung lebih besar dari ttabel yaitu 6,67 > 1,67 maka Ha diterima dan Ho ditolak, hal ini menunjukkan bahwa metode latihan shuttle run memberikan pengaruh terhadap hasil dribble bola basket. Implikasi penelitian ini adalah latihan shuttle run dapat digunakan dalam dribble pada permainan bola basket.Kata-kata kunci : latihan shuttle run, dribble, bola basket
Abstract-The purpose of the study is to obtain empirical data on the improved competence in English language through the roles in a drama. This research is an action research, meaning, an activity to improve performance between the lecturer and the student. An action research has different characteristics such as situational, contextual, collaborative, self-reflective, evaluative set and flexible ones. This study includes qualitative and quantitative measures. In a qualitative manner, the student is trained to recognise his problems, and the lecturer helps to analyse problems. The student is then trained to solve his own problems and to plan what he is going to do. The qualitative result of the study is that the student's speaking competence can be improved through applications in the drama roles. The applications or method of learning may improve student's confidence in learning English language.
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