1,720,956 research outputs found
Formulasi Dan Karakterisasi Granul NPK Lepas Lambat Dengan Teknik Double Coating Menggunakan Polimer Penyalut Bioblend Polistiren – Polikaprolakton Dan Uji Efektifitasnya SecaraIn-Planta
Full text linkABSTRAK
Telah dilakukan penyalutan untuk mendapatkan granul NPK lepas lambat dengan metode dua lapis menggunakan bahan penyalut dan pelarut yang murah dan ramah lingkungan yaitu polistiren dan polimer biodegradabel polikaprolakton dengan pelarut etil asetat yang di produksi pada skala pilot. Polistiren tidak bersifat biodegradable, sehingga untuk mendapatkan karakteristik biodegradable, pada polistiren ditambahkan biopolimer polikaprolakton yang diharapkan dapat membentuk pori-pori. Bioblend polistiren - polikaprolakton memiliki kompatibilitas yang baik dengan butiran NPK, yang dapat mengurangi tingkat pelepasan nutrisi dari pupuk. Hasil penelitian menunjukkan bahwa tingkat pelepasan granul pupuk NPK dua lapis (Double Coating) yang diperoleh lebih lambat dibandingkan dengan granul NPK yang tidak dilapisi. Pelepasan zat aktif dalam media air suling setelah 48 jam pengujian adalah 21,050 % untuk NPK dua lapis (Double Coating) dan 84,563 % untuk NPK yang tidak dilapisi. Formula pelapisan NPK lepas lambat Double Coating dengan bioblend polistiren - polikaprolakton memenuhi kriteria sebagai produk pupuk lepas lambat.
Kata kunci : Granul NPK, polistiren, polikaprolakton, bioblend, Double Coating
STRATEGI PENGEMBANGAN USAHAGALAMAI RASA DURIAN AMAN DI KOTA PADANG
Full text linkUsaha yang berskala kecil merupakan bagian integral dunia usaha nasional
yang mempunyai kedudukan, potensi dan peranan yang sangat penting dan
strategis. Tak dapat dipungkiri selama krisis moneter laju perekonomian Indonesia
digerakkan oleh sektor industri kecil dan pertanian. Hal ini disebabkan industri
kecil yang sifatnya sangat adaptif dan fleksibel dalam menghadapi situasi krisis
ekonomi (Siregar, 2000).
Salah satu usaha kecil yang mengolah hasil pertanian di kota Padang
adalah usaha yang memproduksi galamai rasa durian. Dimana kegiatan usaha ini
melakukan proses produksi dengan mengolah durian, tepung ketan, gula, kelapa,
dan garam menjadi produk yang siap dikonsumsi. Usaha galamai rasa durian
sangat berpotensi untuk dikembangkan karena masih sedikitnya orang yang
melirik peluang usaha ini selain itu walaupun buah durian tergolong kedalam
buah musiman, tetapi pada saat panennya datang ketersediaan bahan baku
utamanya sangat melimpah. Ini dapat dilihat dari jumlah produksi durian di
Sumatera Barat, dimana hampir setiap kabupaten/kota yang ada di Sumatera Barat
memproduksi durian (Lampiran
The Effect Of The Healthy Clean Live Knowledge (Phbs) Toward Student Personal Cleanliness By Using A Saintific Approach At The Fourth And Fifth Grade Students In The Environment Of Sd Negeri 04 Minas
No full textFactors affecting individual health and public health are heredity, environment, behavior and public service (Soekidjo Notoatmodjo, 2010). In addition to factors affecting health, there are factors that influence clean life behavior, among others social class and economy class, knowledge, attitude, health status and personal habits. In relation to this matter, SD Negeri 04 Minas is a Primary School which has applied about healthy clean living in school by giving the material about school environment health. But in reality SD Negeri 04 Minas are less clean and tidy in dressing and shodding, picket cleaning classrooms that should always be reminded, there is a garbage disposal is not in place, students do not wash hands after exercise and before eating, students have cavities, Students have long and unsanitary nails, and students have less clean hair (there are ticks). Based on the phenomenon exists can be concluded that on the students.
Based on the background and identification of problems that have been mentioned above, then the problem in this research is "How High Level of Knowledge of Clean Healthy Behavior (PHBS) to Personal Hygiene Student by using scientific approach in Class IV and V at SD Negeri 04 Minas? "
The research used in this research is quantitative descriptive research.According Sugiyono (2013: 30-31), quantitative descriptive is research conducted with the main purpose of making an objective description or description of a situation that is about PHBS knowledge of personal hygiene of students by using scientific approach in class IV and V SD Negeri 04 Minas.The method used in this research is with technique of taking data using test.The test is a questionnaire filled by students of grade IV and V of SD Negeri 04 Minas who acts as research respondents.From these results it can be known level of knowledge about PHBS on personal hygiene of students by using scientific approach in class IV and V SD Negeri 04 Minas.The type of data in this study is data taken directly in the field.The study took place from March 2016.
Based on the results of research and discussion of researchers in students of Class IV and V SD Negeri 04 Minas presented, it can be concluded that the students of grade IV and V in SD Negeri 04 Minas as much as 66.7% or 28 students into either category, 31.0% or 13 Students enter enough category and 2.4% enter the category less or 1 student.Thus the need for in-depth knowledge and practice repeatedly so that students of grade IV and V SD Negeri 04 Minas on Clean Healthy Behavior (PHBS) on personal hygiene can run continuously
Penetapan Kadar Pektin dan Metoksil Kulit Buah Naga Merah (Hylocereus Polyrhizus) yang Diekstraksi Dengan Metode Refluks
Full text linkSalah satu buah yang banyak dimanfaatkan di Indonesia adalah buah naga merah (Hylocereus polyrhizus). Buah naga merah banyak dikonsumsi secara langsung atau diolah menjadi jus, agar-agar, dan pewarna alami, sedangkan kulitnya mengandung pektin ± 10,8% . Pektin merupakan komponen tambahan dalam industri makanan, farmasi dan kosmetik, pektin digunakan sebagai pengental, pengikat, obat-obatan. Tujuan penelitian ini adalah untuk mengetahui kadar pektin yang terdapat pada kulit buah naga merah. Pengambilan pektin yang terdapat pada kulit buah naga merah dilakukan dengan metode ekstraksi menggunakan pelarut asam klorida (HCl) 0,35 N. Proses ekstraksi pektin pada penelitian ini menggunakan waktu 90 menit. Setelah ekstraksi selesai dilakukan karakterisasi pektin antara lain, kadar pektin, kadar air , berat ekivalen, kadar metoksil. Hasil penelitian yang dilakukan didapatkan kadar pektin 6,118% dan 1,895%, kadar air 23,747% dan 18,059%, berat ekivalen 346,284 mg dan 456,898 mg, kadar metoksil 2,504% dan 1,638%.
One fruit that is widely used in Indonesia is the red dragon fruit (Hylocereus polyrhizus). Dragon fruit is consumed directly or processed into juice, jelly, and natural dyes, while the peel contains ± 10.8% pectin. Pectin is an additional component in the food, pharmaceutical and cosmetic industries, pectin is used as a thickener, binder, medicine. The purpose of this study was to determine the levels of pectin found in red dragon peel. Extraction of pectin contained in red dragon was carried out by extraction method using 0.35 N hydrochloric acid (HCl) solvent. The pectin extraction process in this study used 90 minutes. The results of the research showed that pectin content was 6.118% and 1.895%, water content was 23.747% and 18.059%, equivalent weight was 346.284 mg and 456.898 mg, methoxyl content was 2.504% and 1.638%
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
