1,721,673 research outputs found
Public-Key Cryptography (Dagstuhl Seminar 11391)
No full textFrom September 25th till September 30th, 2011, the Dagstuhl Seminar 11391 about
``Public-Key Cryptography'' took place at Schloss Dagstuhl. The meeting hosted
33 international researchers and incited active discussions about recent developments in this area
Optimizing conditions for augmented production of amylase by Talaromyces islandicus AUMC 11391
No full textBackground: To satisfy rising biotechnological needs, climate change, and depleting water supplies, amylases that can survive high temperatures, and salt concentrations must be developed. Amylases are the most important enzymes that comprise approximately 25–33% of the international enzyme market and have a great role in many industries. Results: In this investigation, Talaromyces islandicus AUMC 11391 was used to produce amylase in submerged fermentation (SmF) in an augmented concentration of 232 ± 36 U/mL after 8 d of incubation at pH 6.0 and 30°C using sodium nitrate as a nitrogen supply. The obtained enzyme was partly purified employing 70% ammonium sulfate and then dialysis. The activity of the produced amylase exhibited reached the peak (992.14 ± 80 U/mg protein) at pH 5.0 and 55°C. Cu, Co, Fe, Ni, Ca, and Zn had an activating effect on the activity of the amylase enzyme at pH 5.0 and 55°C by 134.57, 123.1, 115.4, 109.76, 105.43, and 103.2%, respectively. The Km and Vmax were recorded as 132.1 mM and 60.6 µmol/min, respectively. T. islandicus AUMC 11391′s-amylase hydrolyzed the raw starch of maize, sorghum, wheat, rice, and oat at rates of 12.3, 113.7, 32.25, 34.67, and 73.6% in contrast to the soluble starch. Conclusions: This enhanced α-amylase from T. islandicus AUMC 11391 looks to be a potential option to meet the present amylase requirements of a variety of industrial processes because of its improved production and beneficial properties.How to cite: Al - Bedak O.A.M., Moharram AM., Ameen F, et al. Optimizing conditions for augmented production of amylase by Talaromyces islandicus AUMC 11391. Electron J Biotechnol 2025;75. https://doi.org/10.1016/j.ejbt.2025.01.008
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
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
The-11391 G/A Polymorphism of the Adiponectin Gene Promoter is Associated with Metabolic Syndrome Traits and the Outcome of an Energy-restricted Diet in Obese Subjects
No full textAdiponectin is an adipose tissue-specific hormone that is commonly decreased in obese Subjects. Furthermore, single-nucleotide polymorphisms (SNPs) of the adiponectin gene have been associated with metabolic phenotypes. The present Study investigated whether the adiponectin gene promoter variant - 11391 G/A (rs17300539) Could predict the risk of developing traits characterizing the metabolic syndrome (MetS) and the impact of weight management. The - 11391 G/A SNP was genotyped in 180 Spanish volunteers (BMI: 31.4 +/- 3.2 kg/m(2); age: 35 +/- 5 years). Clinical measurements were determined at baseline, following an 8-week low-calorie diet (LCD), and at 32 and 60 weeks. At baseline, the GG genotype was associated with higher HOMA-IR, insulin and triacylglyceride concentrations than other genotypes (p0.05). By 32 weeks after dietary therapy (n=84), GG carriers had recovered the risk of metabolic comorbidities (OR: 2.420, p=0.043). This risk was even more evident after 60 weeks (OR: 2.875, p=0.014). These data show an increased risk of insulin resistance and MetS complications in obese subjects of the - 11391 GG genotype. The risk was markedly reduced during an energy-restricted diet, but was not sustained. Carriage of the A allele therefore confers protection from weight regain, and the effect is particularly evident 32-60 weeks after the dietary intervention, when improvement in GG subjects had disappeared
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