Bibliografie tematiche / 813/.54

Letteratura scientifica selezionata sul tema "813/.54"

Autore: Grafiati

Pubblicato: 25 luglio 2024

Ultima modifica: 31 luglio 2024

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Articoli di riviste sul tema "813/.54"

WILLIAMS, NICOLE C., e STEVEN C. INGHAM. "Thermotolerance of Escherichia coli O157:H7 ATCC 43894, Escherichia coli B, and an rpoS-Deficient Mutant of Escherichia coliO157:H7 ATCC 43895 Following Exposure to 1.5% Acetic Acid". Journal of Food Protection 61, n. 9 (1 settembre 1998): 1184–86. http://dx.doi.org/10.4315/0362-028x-61.9.1184.

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On a beef carcass, Escherichia coli may sequentially encounter acid- and heat-intervention steps. This study tested whether acid stress (1.5% [vol/vol] acetic acid, pH 4.0, 37°C, 15 min) would enhance subsequent heat resistance of E. coli. Initially, cells (E. coli O157:H7 ATCC 43894, nonpathogenic E. coli B [strain FRIK-124], and rpoS-deficient mutant 813-6 [derived from E. coli O157:H7 ATCC 43895]) were acid stressed and transferred to 54°C tiypticase soy broth (TSB), and survivors were immediately enumerated after at least three intervals of 12, 2, and 6 min, respectively, by plating. The ATCC 43894 and 813-6 strains survived the acid stress but strain FRIK-124 did not. Acid-stressed ATCC 43894 had significantly lower D values than the non-acid-stressed controls. Strain 813-6 had significantly lower D values than strain ATCC 43894, with no significant difference between acid-stressed and non-acid-stressed cells. In a second experiment, cooling of cells prior to plating resulted in an increased D value for acid-stressed ATCC 43894 cells, such that it was not significantly different from the D value for non-acid-stressed Controls. Using this protocol, there was no significant difference in D values between acid-stressed and non-acid-stressed ATCC 43894 cells in prewarmed TSB (54, 58, and 62°C), in prewarmed ground beef slurry (GBS; 58°C), or in TSB and GBS inoculated at 5°C and heated to 58°C. The acid stress tested does not enhance subsequent heat resistance of E. coli.

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Zhang, Xiangyan, Wenwen Ran, Jie Wu, Hong Li, Huamin Liu, Lili Wang, Yujing Xiao, Xiaonan Wang, Yujun Li e Xiaoming Xing. "Deficient mismatch repair and RAS mutation in colorectal carcinoma patients: a retrospective study in Eastern China". PeerJ 6 (5 febbraio 2018): e4341. http://dx.doi.org/10.7717/peerj.4341.

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Objectives To investigate the frequency and prognostic role of deficient mismatch repair (dMMR) and RAS mutation in Chinese patients with colorectal carcinoma. Methods Clinical and pathological information from 813 patients were reviewed and recorded. Expression of mismatch repair proteins was tested by immunohistochemistry. Mutation analyses for RAS gene were performed by real-time polymerase chain reaction. Correlations of mismatch repair status and RAS mutation status with clinicopathological characteristics and disease survival were determined. Results The overall percentage of dMMR was 15.18% (121/797). The proportion of dMMR was higher in patients <50 years old (p < 0.001) and in the right side of the colon (p < 0.001). Deficient mismatch repair was also associated with mucinous production (p < 0.001), poor differentiation (p < 0.001), early tumor stage (p < 0.05) and bowel wall invasion (p < 0.05). The overall RAS mutation rate was 45.88%, including 42.56% (346/813) KRAS mutation and 3.69% (30/813) NRAS mutation (including three patients with mutations in both). KRAS mutation was significantly associated with mucinous production (p < 0.05), tumor stage (p < 0.05) and was higher in non-smokers (p < 0.05) and patients with a family history of colorectal carcinoma (p < 0.05). Overall, 44.63% (54/121) dMMR tumors harbored KRAS mutation, however, dMMR tumors were less likely to have NRAS mutation. Moreover, dMMR, KRAS and NRAS mutation were not prognostic factors for stage I–III colorectal carcinoma. Conclusions This study confirms that the status of molecular markers involving mismatch repair status and RAS mutation reflects the specific clinicopathological characteristics of colorectal carcinoma.

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Bhamani, Shireen Shehzad, Omrana Pasha, Rozina Karmaliani, Nargis Asad e Iqbal Azam. "Validation of the Urdu Version of Wagnild and Young’s Long and Short Resilience Scales Among 20- to 40-Year-Old Married Women Living in Urban Squatter Settlements of Karachi, Pakistan". Journal of Nursing Measurement 23, n. 3 (2015): 425–35. http://dx.doi.org/10.1891/1061-3749.23.3.425.

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Background: There were no instrument exists in South Asia to assess resilience. Thus, this study assessed the validity and reliability of the Urdu version of Wagnild and Young’s long and short Resilience Scales. Methods: Study was carried out in two urban squatter settlements of Karachi, Pakistan. Resilience Scales were validated against the depression, anxiety, and life satisfaction scales among 20- to 40-year-old married women. Sample size for validity and reliability were 636 and 319. Results: Moderate negative correlation with the depression and anxiety and moderate positive significant correlation with life satisfaction were found with both scales. The test–retest correlation were .54 and .49, respectively. Internal consistency were found acceptable. Concurrent validity were .729 and .813. Conclusions: Study found a valid and reliable resilience scale in Urdu language.

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Ruusunen, Anu, Soili M. Lehto, Tommi Tolmunen, Jaakko Mursu, George A. Kaplan e Sari Voutilainen. "Coffee, tea and caffeine intake and the risk of severe depression in middle-aged Finnish men: the Kuopio Ischaemic Heart Disease Risk Factor Study". Public Health Nutrition 13, n. 8 (1 aprile 2010): 1215–20. http://dx.doi.org/10.1017/s1368980010000509.

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AbstractObjectiveOnly a few cross-sectional studies have assessed the association between coffee, tea and caffeine and the risk of depression. Our aim was to determine the association in a population-based cohort study.DesignThe population-based Kuopio Ischaemic Heart Disease Risk Factor Study cohort was recruited between 1984 and 1989 and followed until the end of 2006. We investigated the association between the intake of coffee, tea and caffeine and depression.SettingEastern Finland.SubjectsMiddle-aged men (n 2232).ResultsAltogether, forty-nine men received a discharge diagnosis of depression. We classified subjects into quartiles according to their mean daily coffee intake: non-drinkers (n 82), light drinkers (<375 ml/d, n 517), moderate drinkers (375–813 ml/d, n 1243) and heavy drinkers (>813 ml/d, n 390). Heavy drinkers had a decreased risk (RR = 0·28, 95 % CI 0·08, 0·98) for depression when compared with non-drinkers, after adjustment for age and examination years. Further adjustment for socio-economic status, alcohol consumption, smoking, maximal oxygen uptake, BMI and the energy-adjusted daily intakes of folate and PUFA did not attenuate this association (relative risk (RR) = 0·23, 95 % CI 0·06, 0·83). No associations were observed between depression and intake of tea (drinkers v. non-drinkers; RR = 1·19, 95 % CI 0·54, 2·23) or caffeine (highest quartile v. lowest quartile; RR = 0·99, 95 % CI 0·40, 2·45).ConclusionsCoffee consumption may decrease the risk of depression, whereas no association was found for tea and caffeine intake.

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Trac, Hy, Renyue Cen e Philip Mansfield. "SCORCH. I. THE GALAXY–HALO CONNECTION IN THE FIRST BILLION YEARS". Astrophysical Journal 813, n. 1 (28 ottobre 2015): 54. http://dx.doi.org/10.1088/0004-637x/813/1/54.

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Teo, Seng Chong, Kok Jun Liew, Mohd Shahir Shamsir, Chun Shiong Chong, Neil C. Bruce, Kok-Gan Chan e Kian Mau Goh. "Characterizing a Halo-Tolerant GH10 Xylanase from Roseithermus sacchariphilus Strain RA and Its CBM-Truncated Variant". International Journal of Molecular Sciences 20, n. 9 (9 maggio 2019): 2284. http://dx.doi.org/10.3390/ijms20092284.

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A halo-thermophilic bacterium, Roseithermus sacchariphilus strain RA (previously known as Rhodothermaceae bacterium RA), was isolated from a hot spring in Langkawi, Malaysia. A complete genome analysis showed that the bacterium harbors 57 glycoside hydrolases (GHs), including a multi-domain xylanase (XynRA2). The full-length XynRA2 of 813 amino acids comprises a family 4_9 carbohydrate-binding module (CBM4_9), a family 10 glycoside hydrolase catalytic domain (GH10), and a C-terminal domain (CTD) for type IX secretion system (T9SS). This study aims to describe the biochemical properties of XynRA2 and the effects of CBM truncation on this xylanase. XynRA2 and its CBM-truncated variant (XynRA2ΔCBM) was expressed, purified, and characterized. The purified XynRA2 and XynRA2ΔCBM had an identical optimum temperature at 70 °C, but different optimum pHs of 8.5 and 6.0 respectively. Furthermore, XynRA2 retained 94% and 71% of activity at 4.0 M and 5.0 M NaCl respectively, whereas XynRA2ΔCBM showed a lower activity (79% and 54%). XynRA2 exhibited a turnover rate (kcat) of 24.8 s−1, but this was reduced by 40% for XynRA2ΔCBM. Both the xylanases hydrolyzed beechwood xylan predominantly into xylobiose, and oat-spelt xylan into a mixture of xylo-oligosaccharides (XOs). Collectively, this work suggested CBM4_9 of XynRA2 has a role in enzyme performance.

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Rubio Rincón, Gina Sorel, e Claudia Xiomara Amaya Perozzo. "Miopía, alteración visual en habitantes de Bogotá y Cundinamarca". Ciencia & Tecnología para la Salud Visual y Ocular, n. 9 (1 dicembre 2007): 43. http://dx.doi.org/10.19052/sv.1514.

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<p>Objetivo: conocer la prevalencia de la miopía en dos instituciones médicas de Bogotá y tres de Cundinamarca durante marzo de 2006 y febrero de 2007, a través de una investigación descriptiva. Materiales y métodos: se examinaron 813 pacientes, de bajos estratos socioeconómicos y principalmente afiliados al régimen subsidiado en salud, que asistieron a la consulta de optometría de los Hospitales Rafael Uribe Uribe, Centro Médico San Camilo de Bogotá, Hospitales El Salvador de Ubaté, San Rafael de Girardot y Mario Gaitán Yanguas de Soacha, de Cundinamarca; mediante valoración optométrica y previa estandarización de la prueba, se recolectó la información en bases de datos SPSS 15.0, determinando aquellas refracciones para ambos ojos, que tuvieran esferas negativas y cilindros menores o iguales a su tercera parte. Resultados: se advirtió que la prevalencia de la miopía fue 17,5% (20/114) en el grupo de 54 - 71 años seguido por el grupo de 18 – 35 años en 16% (24/150). E igualmente la prevalencia por sexo fue en un 10,3% (53/515) en mujeres y en 9,1% (27/298) en hombres. Conclusiones: la miopía se presenta principalmente en personas adultas en edad económicamente productiva, lo que refleja la importancia del diagnóstico y el tratamiento oportuno de la misma por presentar una prevalencia media y significativas alteraciones visuales en la población.</p>

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Moravec, Jaromír, Miloš Mičian, Miloslav Málek e Martin Švec. "Determination of CCT Diagram by Dilatometry Analysis of High-Strength Low-Alloy S960MC Steel". Materials 15, n. 13 (1 luglio 2022): 4637. http://dx.doi.org/10.3390/ma15134637.

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High-strength steels are used more than general structural steel due to their combination of properties such as high strength, good toughness and weldability. They are mainly used in the manufacture of heavy vehicles for the mining industry, cranes, transportation, etc. However, welding these grades of steel brings new challenges. Also, a simulation for welding high-strength steel is required more often. To insert a material database into the simulation program, it is necessary to conduct investigations using CCT (Continuous Cooling Transformation) diagrams, welded joints research, and more. To investigate the behavior of S960MC steel during heating and cooling, we used dilatometry analysis supported by EBSD (Electron Backscatter Diffraction) analysis. A CCT diagram was constructed. The transformation temperatures of Ac1 and Ac3 increase with increasing heating rate. The Ac1 temperature increased by 54 °C and the Ac3 temperatures by 24 °C as the heating rate increased from 0.1 °C/s to 250 °C/s. The austenite decomposition temperatures have a decreasing trend in the cooling phase with increasing cooling rate. As the cooling rate changes from 0.03 °C/s to 100 °C/s, the initial transformation temperature drops from 813 °C to 465 °C. An increase in the cooling rate means a higher proportion of bainite and martensite. At the same time, the hardness increases from 119 HV10 to 362 HV10.

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Ivanova, Elena S., Anna P. Geraskina e Sergei E. Spiridonov. "Two new species of Phasmarhabditis Andrássy, 1976 (Nematoda: Rhabditidae) associated with land snails in Northwest Caucasus, Russian Federation: description and molecular affiliation". Nematology 22, n. 2 (10 febbraio 2020): 179–97. http://dx.doi.org/10.1163/15685411-00003299.

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Summary Two new nematode species of Phasmarhabditis were isolated from land snails in North and West Caucasus, Russian Federation. Phasmarhabditis circassica sp. n. originated from Oxychilus sp. collected by the Nickel settlement in the Adygea Republic while P. clausiliiae sp. n. came from Clausiliidae gen. sp. in the Stavropol district. Phasmarhabditis circassica sp. n. is characterised morphologically by male spicules with a hollow tip, a widely conoid, spicate female tail, ensheathed dauer juveniles 896 (813-982) μm long with a tiny but distinct cuticular apical cap and a long filamentous tail, and exsheathed dauers 773 (670-950) μm long with a tail half as long as in the ensheathed dauers and with a rounded tip. Phasmarhabditis clausiliiae sp. n. is very close to P. circassica sp. n. in having similar morphological traits and is differentiated mainly in having a longer female tail of 94 (79-111) vs 82 (54-125 μm) and the much smaller ratio c of 13.7 (10.3-18.4) vs 22.7 (16.8-27.5) and by its molecular characteristics. The molecular analysis based on partial sequences of LSU rDNA, and ITS rDNA regions has been performed and showed that the closest match for both new species was P. bohemica. Despite the morphological similarity between the species described, significant difference between these two new species was reported both for LSU rDNA and ITS rDNA.

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Yang, Eu, Ye Shim, Heung Kim, Young Lim, Ho Im, Kyung-Nam Koh, Hyery Kim et al. "Genetic Confirmation and Identification of Novel Variants for Glanzmann Thrombasthenia and Other Inherited Platelet Function Disorders: A Study by the Korean Pediatric Hematology Oncology Group (KPHOG)". Genes 12, n. 5 (6 maggio 2021): 693. http://dx.doi.org/10.3390/genes12050693.

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The diagnosis of inherited platelet function disorders (IPFDs) is challenging owing to the unavailability of essential testing methods, including light transmission aggregometry and flow cytometry, in several medical centers in Korea. This study, conducted by the Korean Pediatric Hematology Oncology Group from March 2017 to December 2020, aimed to identify the causative genetic variants of IPFDs in Korean patients using next-generation sequencing (NGS). Targeted exome sequencing, followed by whole-genome sequencing, was performed for diagnosing IPFDs. Of the 11 unrelated patients with suspected IPFDs enrolled in this study, 10 patients and 2 of their family members were diagnosed with Glanzmann thrombasthenia (GT). The variant c.1913+5G>T of ITGB3 was the most common, followed by c.2333A>C (p.Gln778Pro) of ITGB2B. Known variants of GT, including c.917A>C (p.His306Pro) of ITGB3 and c.2975del (p.Glu992Glyfs*), c.257T>C (p.Leu86Pro), and c.1750C>T (p.Arg584*) of ITGA2B, were identified. Four novel variants of GT, c.1451G>T (p.Gly484Val) and c.1595G>T (p.Cys532Phe) of ITGB3 and c.1184G>T (p.Gly395Val) and c.2390del (p.Gly797Valfs*29) of ITGA2B, were revealed. The remaining patient was diagnosed with platelet type bleeding disorder 18 and harbored two novel RASGRP2 variants, c.1479dup (p.Arg494Alafs*54) and c.813+1G>A. We demonstrated the successful application of NGS for the accurate and differential diagnosis of heterogeneous IPFDs.

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Libri sul tema "813/.54"

Reed, Kit. Weird women, wired women. Hanover, NH: Published by University Press of New England [for] Wesleyan University Press, 1998.

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Carver, Raymond. Where I'm calling from: New and selected stories. New York: Vintage Books, 1989.

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Carver, Raymond. Where I'm Calling From: New and selected stories. New York, USA: Atlantic Monthly Press, 1988.

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Carver, Raymond. Where I'm calling from: New and selected stories. New York: Atlantic Monthly Press, 1988.

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K, Dick Philip. Selected stories of Philip K. Dick. New York: Pantheon Books, 2002.

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Nabokov, Vladimir Vladimirovich. Despair: A novel. New York: Vintage Books, 1989.

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Flannery, O'Connor. Collected works. New York, NY: Library of America, 1988.

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D, Smith Jeffrey, a cura di. Her smoke rose up forever. San Francisco, Calif: Tachyon Publications, 2004.

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1940-, Nicol Charles, e Barabtarlo Gennady 1949-, a cura di. A Small Alpine form: Studies in Nabokov's short fiction. New York: Garland Pub., 1993.

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Kurt, Vonnegut. Novels & stories, 1963-1973. A cura di Offit Sidney. New York: Library of America, 2011.

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Atti di convegni sul tema "813/.54"

Timms, Chris, Doug Swanek, Duane DeGeer, Arjen Meijer, Ping Liu, Erich Jurdik e Jay Chaudhuri. "TurkStream Collapse Test Program". In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78454.

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The TurkStream pipeline project is designed to transport approximately 32 billion cubic meters of natural gas annually from Russia to Turkey under the Black Sea, with more than 85% of the deep-water route being deeper than 2000 m. The offshore section is intended to consist of two parallel lines, each approximately 900 km long. The preliminary stages of the front end engineering design (pre-FEED) phase was managed by INTECSEA. To support the analyses and design of the deepest portions, a full scale collapse test program was performed by C-FER Technologies (C-FER). This collapse test program, which included 62 full-scale collapse and pressure+bend tests, 54 medium-scale ring collapse tests, and hundreds of small-scale tests, was primarily aimed at measuring, quantifying and documenting the increase in pipe strength and collapse resistance resulting from the thermal induction heat treatment effect (thermal ageing) that arises during the pipe coating process. Two grades of 32-inch (813 mm) outside diameter (OD) line-pipe, SAWL450 and SAWL485 with wall thicknesses of 39.0 mm or 37.4 mm, respectively, were supplied from various mills for testing. The collapse test program objectives were as follows: • Determine the collapse resistance of line pipes originating from various pipe mills; • Determine the pressure+bend performance of line pipes originating from various pipe mills; • Measure the effect of thermal ageing on material and collapse testing results, including the impact of multiple thermal cycles; and • Evaluate the results of medium-scale ring collapse tests as compared to full-scale tests. This paper presents selected results of this work, along with some comparisons to predictive equations.

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