Abstract. Manullang JR, Nugroho RA, Rohmah M, Rudianto, Qorysuchi A. 2021. Plant-extract-mediated biosynthesis of silver nanoparticles using Eleutherine americana bulb extract and its characterization. Nusantara Bioscience 13: 247-254. The plant-based biosynthesis of nanoparticles has gained increasing momentum due to being lower in cost and eco-friendly. This study aimed to biosynthesize nanoparticles from the bulb ethanolic extract of Eleutherine americana (Aubl.) Merr. ex K.Heyne (Ea-AgNPs), then characterize Ea-AgNPs and determine their phytochemical content and antioxidant capacity. The Ea-AgNPs were synthesized using ethanolic extract of E. americana bulb along with various concentrations of AgNO3 (0.5-4 mM). The Ea-AgNPs were then characterized using UV-VIS spectroscopic, Scanning Electron Microscopy/ Energy Dispersive X-ray (SEM/EDX), Transmission Electron Microscopy (TEM), X-ray Powder Diffractometry (XRD), and Fourier-Transform Infrared Spectroscopy (FTIR) techniques. The results indicated that E. americana can be used to reduce AgNO3 to synthesize Ea-AgNPs, indicated by color change, and had optimum UV/VIS spectra at 400 nm. The FTIR analysis found that Ea-AgNPs showed peaks at 2919, 2850, 1586, and 1031 cm1, containing several important biocompounds. Additionally, the XRD results found an amorphous Ea-AgNP peak with maximum intensity and proportion of silver occurring at 24 Theta. The particle size distribution curve of Ea-AgNPs showed a size of 105 nm. Furthermore, SEM/EDX analysis revealed an optical absorption characteristic peak at 3 keV. The EDX examination revealed three signals: a strong signal from the C atom (70.99 %), an O atom (28.95 %), and Ag atom (0.06 %). The TEM imaging also showed the characteristics of Ea-AgNPs. Some phytochemicals such as flavonoids, tannins, alkaloids, and saponins were found in Ea-AgNPs, with IC50 values of 45.30 ppm.
Jahe merah (Zingiber officinale Var. Rubrum) dikenal sebagai bakteriasida. Penelitian ini bertujuan untuk mengetahui aktivitas antibakterial bubuk jahe terhadap pertumbuhan bakteri anaerob dan coliform (Escherichia coli dan Salmonella sp.) secara in vivo pada Broiler. Penelitian ini menggunakan dua puluh empat DOC dengan berat badan 40,7 g. Pemberian bubuk jahe diberikan pada Broiler selama 5 hari dengan konsentrasi ekstrak jahe merah yaitu, 0,5, 1, dan 1,5% per kg pakan. Peubah yang diamati adalah berat badan, asupan pakan dan koloni bakteri. Hasil penelitian menunjukkan terdapat pengaruh ekstrak jahe merah pada total koloni bakteri yang cenderung menurun dengan semakin tinggi konsentrasi ekstrak jahe merah, semakin tinggi efek hambatan pertumbuhan bakteri. Dapat disimpulkan bahwa ekstrak jahe merah memiliki sejumlah aktivitas antibakteri untuk pertumbuhan bakteri anaerob dan coliform (E. coli dan Salmonella sp.).
ABSTRAKBerbagai metode terus dilakukan dan digalakkan untuk menumbuhkan dan mengembangkan semangat berwirausaha di Universitas Mulawarman sehingga mahasiswa semakin tertarik untuk berwirausaha. Tujuan dari kegiatan Program Pengembangan Kewirausahaan (PPK) ini adalah untuk mengembangkan kewirausahaan di Universitas Mulawarman yang berorientasi dari keilmuan dan potensi lokal sehingga menghasilkan wirausaha yang handal , mandiri dan professional. Dalam pencapaian target tersebut program PPK pada tahun ke tiga ini diawali dengan melakukan kegiatan webinar yang menghadirkan narasumber dari Bank Indonesia, dosen Universitas Mulawarman dan startup serta peserta PPK yang sudah mandiri. Kegiatan webinar dilaksanakan juga merupakan dari proses sosialisasi PPK dan sekaligus menjaring peserta mahasiswa/alumni Universitas Mulawarman yang berminat untuk mendaftar. Sosialisasi ke fakultas juga Jurusan/program Studi dan sampai akhir pendaftaran sebanyak 55 orang mahasiswa/alumni mendaftar dari berbagai fakultas di Universitas Mulawarman Seleksi tenant dilakukan secara transparan dengan wawancara melalui video call. Penetapan calon tenant sejumlah dua puluh orang yang lolos seleksi dari berbagai fakultas. Pelaksanaan pelatihan kewirausahaan melalui offline/online teori dan praktek. Kunjungan lapang dilakukan ke wirausaha UMKM yang sudah maju, pendampingan secara kontiniu dan magang wirausaha Dilakukan juga presentasi proposal bisnis untuk mengetahui sampai sejauh mana peserta PPK mampu menyusun proposal bisnis. Kata kunci: magang; pelatihan; pendampingan; PPK; universitas mulawarman ABSTRACTVarious methods continue to be carried out and are encouraged to grow and develop the spirit of entrepreneurship at Mulawarman University so that students are increasingly interested in entrepreneurship. The purpose of this Entrepreneurship Development Program (PPK) activity is to develop entrepreneurship at Mulawarman University which is oriented from local knowledge and potential so as to produce reliable, independent and professional entrepreneurs. In achieving this target, the PPK program in its third year was initiated by conducting a webinar that presented resource persons from Bank Indonesia, Mulawarman University lecturers and startups as well as independent PPK participants. The webinar activity carried out is also part of the PPK socialization process and at the same time attracts Mulawarman University student/alumni participants who are interested in registering. Socialization to faculties as well as Departments/Study programs and until the end of registration as many as 55 students/alumni enrolled from various faculties at Mulawarman University. Tenant selection is carried out transparently by interview via video call. Determination of prospective tenants as many as twenty people who passed the selection from various faculties. Implementation of entrepreneurship training through offline/online theory and practice. Field visits were conducted to advanced MSME entrepreneurs, continuous mentoring and entrepreneurial internships. Business proposal presentations were also conducted to find out to what extent KDP participants were able to develop business proposals. Keywords : internship; trainin; mentoring; PPK; mulawarman university
Many efforts have been made to increase entrepreneurship mental in higher education level so that students are interested to be entrepreneurs. This need to be done since the number of entrepreneurs in Indonesia is still limited. The Objective of this Entrepreneurship Development Program (EDP) was that to develop entrepreneurship at Mulawarman University which focused on local based content. This was done in order to bear professional, independent, and reliable entrepreneurs. To achieve the goals, this EDP socialized its program to all Faculties and Departments before conducting tenant open recruitment. Next, the selected tenants got training from experts. The training activities covered basic knowledge and practice of entrepreneurship and field trip to some local industries, which were considered to be successful. Afterward, the trainers were allowed to join internship program. In this program, trainers got expert assistance to help them to construct entrepreneurship proposal which was related to their field of study. When these targeted tenant had successfully run their small businesses professionally and independently, the new tenant were recruited in the next following year. By doing so, the cycles of entrepreneurship in Mulawarman University would continue to generate.
Ayam petelur dibudidayakan khusus untuk menghasilkkan telur secara komersial. Seiring bertambahnya usia ayam kualitas telur yang dihasilkan mengalami penurunan. Telur merupakan bahan pangan hasil hewani yang mudah rusak dan mudah menurun kualitasnya. Salah satu langkah yang dapat dilakukan untuk meningkatkan kualitas telur adalah dengan menambahkan Feed additive dalam pakan. Penelitian ini dilakukan untuk mengetahui pengaruh penambahan tepung daun katuk terhadap kualitas eksterior dan kualitas interior pada telur ayam konsumsi. Penelitian dilaksanakan di peternakan ayam petelur CV. Zafa Anugrah Mandiri dan Laboratoriun Nutrisi Ternak pada bulan November sampai Desember 2020. Percobaan menggunakan Rancangan Acak Lengkap dengan empat perlakuan dan enam ulangan. Faktor tunggal dalam penelitian ini adalah konsentrasi tepung daun katuk dalam pakan. Data yang diperoleh dianalisi menggunakan sidik ragam (ANOVA) dan diuji lanjut menggunakan uji beda nyata tekecil (BNT) pada taraf 5 %. Penelitian ini menunjukan hasil yang berbeda tidak nyata pada bobot telur, indeks telur, berat jenis telur, indeks kuning telur, indeks putih telur dan Haugh Unit akan tetapi berpengaruh nyata pada tebal kerabang dan pH telur. Nilai bobot telur yang dihasilkan memiliki rataan 62,36 – 63,85, nilai indeks telur memiliki rataan 74,21- 77,76, nilai berat jenis yang dihasilkan yaitu 1,09 – 1,15, indeks kuning telur meiliki nilai rataan 0,43 – 0,45, nilai indeks putih telur memiliki rata – rata 0,12 – 0,13 dan nilai Haugh Unit 92,90 – 95,59, adapun untuk nilai kerabang telur 0,38 – 0,44, untuk nilai pH dalam penelitian ini adalah 6,60 – 6,85. Dapat disimpulkan bahwa semakin banyak penambahan tepung daun katuk dalam pakan memberikan pengaruh terhadap penambahan ketebalan kerabang dan nilai pH telur.
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