1,725,487 research outputs found
Pengaruh Konsentrasi Molase Terhadap Aktivitas Enzim Fibrinolitik dari Bacillus subtilis ATCC 6633
Get PDFMolasse adalah salah satu sumber karbon paling murah dan mudah diperoleh sebagai limbah industri pabrik gula yang kaya nutrisi dan mineral. Molase mengandung gula 62% dari total gula, sehingga memiliki potensi yang memadai untuk media pertumbuhan mikroba. Peran molase sebagai media nutrisi untuk produksi enzim fibrinolitik telah diteliti. Bacillus subtilis ATCC 6633 digunakan sebagai penghasil enzim fibrinolitik menggunakan molase sebagai substrat atau salah satu komponen medium pertumbuhan dan fermentasi. Molase dapat ditambahkan ke media fermentasi pada berbagai konsentrasi (0,1%, 0,25%, 0,5% dan 2%). Enzim fibrinolitik sebagai produk fermentasi diuji dengan metode plat fibrin. Pertumbuhan maksimum Bacillus subtilis ATCC 6633 diamati 30 jam setelah inkubasi pada thermo-shaker 90 rpm dan suhu 28C. Hasil studi menunjukkan bahwa Bacillus subtilis ATCC 6633 mampu menghasilkan enzim fibrinolitik dengan nilai indeks fibrinolitik 2,30 ± 0,20 mm. Molase dapat digunakan sebagai media pertumbuhan Bacillus subtilis ATCC 6633 untuk produksi enzim fibrinolitik dengan konsentrasi optimum 0,1% tanpa sumber karbon lain dengan aktivitas sebesar 0,3254 ± 0,0392 Unit.mLo -11.menit
NS 6633, hibrid kukuruza
No full textOvo je novostvoreni hibrid kukuruza (Zea mays L.) NS 6633 priznat od strane Uprave za zaštitu bilja Ministarstva poljoprivrede, šumarstva i vodoprivrede Republike Srbije.This is registered newly-developed hybrid of maize (Zea mays L.) NS 6633 released by the Plant Protection Directorate of the Ministry of Agriculture, Forestry and Water Management of the Republic of Serbia.Broj rešenja: 320-09-02540/2/2021-11
Datum rešenja: 23.03.2023
X-rays from the open cluster NGC 6633
No full textNGC 6633 is a young, open cluster with a similar age to the Hyades and Praesepe, but probably a lower metallicity. We present the results of ROSAT High Resolution Imager observations of an optically selected catalogue of likely members of NGC 6633. 8 out of 51 NGC 6633 members have been detected, with main-sequence spectral types A to G, above a threshold X-ray luminosity of ≈6−12×1028 erg s−1. We find that NGC 6633 does not contain cool stars that are as X-ray luminous as the most active objects in the Hyades and that the median X-ray luminosity of F-G stars in NGC 6633 is less than that in the Hyades, but probably greater than in Praesepe. However, when X-ray activity is expressed as the X-ray to bolometric flux ratio we find that NGC 6633 and the Hyades are very similar and display similar peak levels of coronal activity. We attribute this discrepancy to a number of possible wide binary systems with higher X-ray (and bolometric) luminosities in the Hyades sample and either a low metallicity in NGC 6633, which makes its cool stars both X-ray and bolometrically less luminous at the same colour, or a distance to NGC 6633 that has been underestimated, which would decrease stellar X-ray luminosities without changing X-ray to bolometric flux ratios
X-rays from the open cluster NGC 6633
No full textNGC 6633 is a young, open cluster with a similar age to the Hyades and Praesepe, but probably a lower metallicity. We present the results of ROSAT High Resolution Imager observations of an optically selected catalogue of likely members of NGC 6633. 8 out of 51 NGC 6633 members have been detected, with main-sequence spectral types A to G, above a threshold X-ray luminosity of ≈6−12×1028 erg s−1. We find that NGC 6633 does not contain cool stars that are as X-ray luminous as the most active objects in the Hyades and that the median X-ray luminosity of F-G stars in NGC 6633 is less than that in the Hyades, but probably greater than in Praesepe. However, when X-ray activity is expressed as the X-ray to bolometric flux ratio we find that NGC 6633 and the Hyades are very similar and display similar peak levels of coronal activity. We attribute this discrepancy to a number of possible wide binary systems with higher X-ray (and bolometric) luminosities in the Hyades sample and either a low metallicity in NGC 6633, which makes its cool stars both X-ray and bolometrically less luminous at the same colour, or a distance to NGC 6633 that has been underestimated, which would decrease stellar X-ray luminosities without changing X-ray to bolometric flux ratios
PENGARUH KONSENTRASI BUNGKIL INTI SAWIT TERHADAP AKTIVITAS MANANASE HASIL FERMENTASI Bacillus subtilis ATCC 6633
Get PDFInfluence of Palm Kernel Cake Concentration
To Mannanase Activi ty From Bacillus subtilis ATCC 6633
Mannanase is an hydrolytic enzyme that can hydrolize both the
polysaccharide mannan and manno-oligosaccharides linked by a β-1,4
mannosidic bond. Mannanase can be applied to animal feed industry, paper,
pharmacy, food, detergent and oil and gas. Plants and microorganisms
especially bacteria Gram positive like Bacillus subtilis can produce
mannanase by fermentation process using palm kernel cake (PKC) as a
substrate. In this research, a Bacillus subtilis ATCC 6633 used as
mannanase resource fermented in agar media containing PKC. This research
was carried out to find the ability of Bacillus subtilis ATCC 6633 to
produce mannanase by fermentation process using PKC as a subtrate and
concentration of PKC which can produce maximum mannanase activity.
The research is conducted in several steps, as follows: reduction of PKC
particle size, inoculation of Bacillus subtilis ATCC 6633, growth test of
Bacillus subtilis ATCC 6633 and act ivity test of mannanase using locust
bean gum (LBG) and PKC as a subtrate. The fermentation was performed
using agar-well difusion method at 120 hours and 37 °C.The results showed
that mannanase activity appears as clear zone obtained around the bacterial
colonies. Diameter of clear zone is converted into mannanolytic index.
Mannanase activity at 0,5% LBG produced mannanolytic index of 2,6 ±
0,22 and 0,25% BIS produced mannanolytic index of 4,0 ± 0,98.
Keywords : Mannanase, Enzyme, Mannan, Bacillus subtilis ATCC 6633,
Palm kernel cak
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Mutations in <i>B</i>. <i>subtilis</i> subsp. <i>spizizenii</i> ATCC 6633.
No full textMutations in B. subtilis subsp. spizizenii ATCC 6633.</p
Variations on the Author
Get PDF“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
Get PDFWe 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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