1,720,963 research outputs found
STERILISASI MIKROBA BUBUK TALC MENGGUNAKAN SINAR GAMMA (Co-60)
Full text linkKerusakan produk bedak talek umumnya disebabkan oleh pertumbuhan mikroba. Beberapa industri mengatasi masalah ini dengan menggunakan teknik pengawetan iradiasi sinar gamma (Cobalt-60). Penelitian ini mengidentifikasi jumlah mikroba yang tersisa dalam bedak talek dan struktur sel bakteri yang diiradiasi. Pada studi pendahuluan, proses iradiasi dilakukan dengan memberikan dosis iradiasi bedak talek yang terdiri dari 4 taraf yaitu 0kGy, 5kGy, 7kGy, dan 9kGy yang dilakukan di PT. Rel-ion Bekasi menggunakan sinar gamma irradiator (Co-60), dan dilanjutkan dengan uji mikrobiologi terhadap sisa mikroba dalam bedak talk yang diradiasi yang dilakukan di Laboratorium Biokimia Fakultas Sains Universitas Brawijaya. Pengujian terdiri dari penghitungan jumlah bakteri dengan metode plate count dan identifikasi struktur sel bakteri dominan menggunakan metode pewarnaan gram dan pengamatan mikroskopis. Hasil penelitian menunjukkan bahwa jumlah bakteri pada bedak talek menurun seiring dengan meningkatnya dosis iradiasi. Identifikasi struktur sel bakteri yang dominan pada bedak talk yang diiradiasi menunjukkan ciri-ciri bakteri Pseudomonas aeruginosa dengan koloni bulat, licin, putih, memberikan pigmen kehijauan pada medium, dan menunjukkan sel bakteri gram negatif, dengan struktur batang, kadang-kadang bergandengan dan bercabang tidak beraturan dan berwarna merah.Kerusakan produk bedak talek umumnya disebabkan oleh pertumbuhan mikroba. Beberapa industri mengatasi masalah ini dengan menggunakan teknik pengawetan iradiasi sinar gamma (Cobalt-60). Penelitian ini mengidentifikasi jumlah mikroba yang tersisa dalam bedak talek dan struktur sel bakteri yang diiradiasi. Pada studi pendahuluan, proses iradiasi dilakukan dengan memberikan dosis iradiasi bedak talek yang terdiri dari 4 taraf yaitu 0kGy, 5kGy, 7kGy, dan 9kGy yang dilakukan di PT. Rel-ion Bekasi menggunakan sinar gamma irradiator (Co-60), dan dilanjutkan dengan uji mikrobiologi terhadap sisa mikroba dalam bedak talk yang diradiasi yang dilakukan di Laboratorium Biokimia Fakultas Sains Universitas Brawijaya. Pengujian terdiri dari penghitungan jumlah bakteri dengan metode plate count dan identifikasi struktur sel bakteri dominan menggunakan metode pewarnaan gram dan pengamatan mikroskopis. Hasil penelitian menunjukkan bahwa jumlah bakteri pada bedak talek menurun seiring dengan meningkatnya dosis iradiasi. Identifikasi struktur sel bakteri yang dominan pada bedak talk yang diiradiasi menunjukkan ciri-ciri bakteri Pseudomonas aeruginosa dengan koloni bulat, licin, putih, memberikan pigmen kehijauan pada medium, dan menunjukkan sel bakteri gram negatif, dengan struktur batang, kadang-kadang bergandengan dan bercabang tidak beraturan dan berwarna merah
STERILISASI MIKROBA BUBUK TALC MENGGUNAKAN SINAR GAMMA (Co-60)
No full textKerusakan produk bedak talek umumnya disebabkan oleh pertumbuhan mikroba. Beberapa industri mengatasi masalah ini dengan menggunakan teknik pengawetan iradiasi sinar gamma (Cobalt-60). Penelitian ini mengidentifikasi jumlah mikroba yang tersisa dalam bedak talek dan struktur sel bakteri yang diiradiasi. Pada studi pendahuluan, proses iradiasi dilakukan dengan memberikan dosis iradiasi bedak talek yang terdiri dari 4 taraf yaitu 0kGy, 5kGy, 7kGy, dan 9kGy yang dilakukan di PT. Rel-ion Bekasi menggunakan sinar gamma irradiator (Co-60), dan dilanjutkan dengan uji mikrobiologi terhadap sisa mikroba dalam bedak talk yang diradiasi yang dilakukan di Laboratorium Biokimia Fakultas Sains Universitas Brawijaya. Pengujian terdiri dari penghitungan jumlah bakteri dengan metode plate count dan identifikasi struktur sel bakteri dominan menggunakan metode pewarnaan gram dan pengamatan mikroskopis. Hasil penelitian menunjukkan bahwa jumlah bakteri pada bedak talek menurun seiring dengan meningkatnya dosis iradiasi. Identifikasi struktur sel bakteri yang dominan pada bedak talk yang diiradiasi menunjukkan ciri-ciri bakteri Pseudomonas aeruginosa dengan koloni bulat, licin, putih, memberikan pigmen kehijauan pada medium, dan menunjukkan sel bakteri gram negatif, dengan struktur batang, kadang-kadang bergandengan dan bercabang tidak beraturan dan berwarna merah
Synthesis of Mn(II)-Loaded Ti<sub>x</sub>Si<sub>1-x</sub>O<sub>4</sub> Composite Acting as a Visible-Light Driven Photocatalyst
Full text linkThe synthesis and characterization of Mn-loaded TixSi1-xO4 (x= 0.4-0.8) composites and a preliminary study of an activity testing their ability to work as photocatalysts for the degradation of methylene blue (MB) have been studied. Synthesis was conducted by the sol-gel method at room temperature using tetraethyl orthosilicate, titanium tetraisopropoxide, and manganese(II) chloride as precursors followed by thermal treatment at 500 °C. The characterizations were performed by X-ray diffraction, FT-IR spectrometry, UV-Vis diffuse reflectance spectrometry and a surface area analyzer. The photocatalytic activity test of composites for degradation of MB was carried out in a closed reactor equipped with UV and visible lights. In this test, the effects of ratio of Ti/Si composites, Mn2+ ion concentration, pH, and time of irradiation on the effectiveness of photodegradation of MB were studied. The results indicated that Mn-Ti0.6Si0.4O4 composite could be synthesized through the sol-gel method followed by thermal treatment with a molar ratio of Ti/Si=60/40 and the optimum concentration of manganese was 2.5 wt%. The Mn-Ti0.6Si0.4O4 composite significantly increased the photodegradation of MB at pH 10, with a percent degradation of 84.41% for 30 min under irradiation of visible light. The percent degradation of Ti0.6Si0.4O4 was only 18.23% under irradiation of visible light
PEMURNIAN GALUR KACANG HIJAU (Vigna radiata L.) LOKAL KAMPAR GENERASI KEEMPAT
Full text linkKampar Regency is one of the areas of mungbean production in Riau Province. As a germ-plasmin genetic diversity, Kampar mungbean is a local variety that can produce high yield mungbean cultivar. The color of pods and seeds of mungbean may affect the consumer taste. The research was aimed to give information about genetic diversity of Kampar local mungbean and its use as a germ-plasm resource to produce a new cultivar with high yield trait. The research was conducted from August to November 2015 at the Biology garden, Faculty of Mathematics and Science, University of Riau. The randomized complete design with 9 lines and 5 replications was used. The result showed the G0, G1, G2, G5, G6, G7, and G8 lines produced black color pods, while G3 line produced blackish brown, and G4 line produced brown color of pods. The seed color of all of the lines exept G0 produced shiny green, while G0 line produce dull and shiny brownish green seed. The color characteristics of pods and seeds had an effect on the consumer taste, but it did not affect on the yield production. Therefore, this information could be used as germ-plasm resource to produce a new high yield cultivar
Effect of Carbonization Time of Mesoporous Carbon in the Dyes Adsorption: Rhodamine B, Methylene Blue and Carmine
Full text linkoai:ijfac.unsri.ac.id:article/168Study of dyes adsorption (rhodamine B, methylene blue and carmine) by using mesoporous carbon synthesized at various carbonization time has been done. Purpose of this research was to understand influence of carbonization time to performance of the mesoporous carbon in dyes adsorption. In addition, adsorption performance of the mesoporous carbon and commercial carbon were compared. The adsorption test were conducted at conditions: 0.1 g of adsorbent, 25 mL of dyes solutions 100 ppm and shaking rate 125 rpm for 4 hour. Filtrate was used to determine remain concentration of the dyes with UV-visible spectrophotometry. Result of the research showed that the carbonization time from 1 to 3 hours improved the adsorption, whereas from 3 to 5 hours decreased it. The best character of the mesoporous carbon was obtained at carbonization time of 3 hours with adsorption values of 96.43 ± 0.37 % for rhodamine-B, 38.80 ± 1.44 % for methylene blue and 48.51 ± 1.55 % for carmine. The adsorption values of the mesoporous carbon were 0.97 times for rhodamine B, 0.48 times for carmine, and 0.39 times for methylene blue compared with the commercial activated carbon
KETERSEDIAAN SARANA DAN PRASARANA PENDIDIKAN DI PAUD SE KECAMATAN MERIGI KABUPATEN KEPAHIANG
No full textTujuaan dari penelitian ini adalah untuk mendeskripsikan ketersediaan
sarana dan prasarana pendidikan di PAUD se Kecamatan Merigi Kabupaten
Kepahiang. Jenis penelitian ini adalah kuantitatif, dengan survey. Teknik
pengambilan sampel, menggunakan teknik total sampling dengan jumlah
populasi dan sampel penelitian sebanyak 6 PAUD. Teknik pemgumpulan data
menggunakan teknik observasi dan teknik analisis data menggunakan uji statistik
dengan rumus persentase. Hasil penelitian menunjukan bahwa secara umum
ketersediaan sarana dan prasarana di PAUD se-Kecamatan Merigi Kabupaten
Kepahiang berada pada kategori kurang tersedia, artinya ketersediaan PAUD Se�Kecamatan Merigi Kabupaten Kepahiang belum sesuai dengan persyaratan dan
ketentuan permendikbud 137 tahun 2014
Kata Kunci: Sarana, Prasaran
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
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