1,720,956 research outputs found
Oral carriage of Staphylococcus aureus in people with different body mass index
Get PDFBackground: The association between obesity and the oral microbiome has received great attention. Objective: This study aimed to determine the association of oral Staphylococcus aureus with different body mass index people. Material and Methods: A total of 155 saliva samples were collected. The individuals were grouped into three categories according to their BMI, normal weight, overweight and obese individuals. A loopful of saliva sample was cultured and incubated at 37 °C for 24. Staphylococcus aureus isolates were diagnosed by colony characteristics, morphology, and biochemical tests. Results: The oral carriage rate of Staphylococcus aureus was 61.3% (65.1% females and 56.5% males). The Staphylococcus aureus rate was 68% in married and 60% in single people. The differences of oral carriage rates of Staphylococcus aureus in obese (73.6%) and overweight (85.4%) populations was statistically significant (p<0.0001) compared to the rate in normal weight group (34%). Among males, the highest oral carriage rate of Staphylococcus aureus was in overweight individuals (82.6%). Likewise, in females, the highest rate of salivary Staphylococcus aureus was among the overweight group (88.9%). Regarding marital status, in single people, the differences of Staphylococcus aureus in obese (p=0.0003) and overweight (p<0.0001) people was significantly compared to normal weight people. But, in married people, the differences in Staphylococcus aureus rates among all groups were statistically not significant (p=0.0935). Conclusion: Staphylococcus aureus was significantly related to overweight and obese individuals. The human oral Staphylococcus aureus may play a key role in the manifestation of obesity. The oral microbiota could provide a new target for improving the physical well being of humans
Prevalence and molecular characterization of extended spectrum beta-Lactamases-producing uropathogenic Escherichia coli isolated in Zakho, Iraq
No full textISOLATION AND CHARACTERIZATION OF RHIZOBIAL ISOLATES IN IRAQ: A FIRST RECORD OF SYMBIOSIS
No full textRhizobia can fix atmospheric nitrogen and they have a good potential of use as biological control agents against human pathogens and soil borne plant pathogens. This research aimed to isolate and characterize of local isolates of rhizobia using conventional methods. 42 rhizobial isolates were isolated from root nodules of different host plants from different cultural areas in different cities in Iraq. The rhizobial cultures were purified and their agronomic and biochemical characteristics were studied. Three rhizobial isolates, viz: OJ27, OJ29 and OJ31 were isolated from root nodules of Bauhinia purpurea L. and Parkinsonia aculeata L, respectively. Rhizobial genera and species of these isolates were still unknown. A first record of isolation of rhizobial bacteria from root nodules/swellings of Catalpa speciose L. All isolates were sensitive to Ciprofloxacin. A high tolerance to Pb (CH3COO)2 were obtained with the exception of R. grahamii OJ26. A maximum mean value of inhibition zone was noticed 18.6 mm when filtrate culture of OJ31 were applied against Candida albicans AS43. A maximum effect of rhizobial filtrate culture of R. leuguminisarm bv. phaseoli OJ6 against a pathogenic plant Aspergillus niger BI1 was 15.6 mm inhibition zone diameter, whereas a minimum effect was 7.0 mm when Ensifer fredii bv. fredii OJ12 filtrate culture applied against Fusarium solani BI2. It was concluded that there was a potential with the isolates for detail research work for production of exopolysaccharides and antimicrobial activity
Prevalence and molecular characterization of extended spectrum beta-Lactamases-producing uropathogenic Escherichia coli isolated in Zakho, Iraq
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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
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