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Journal articles on the topic '657 438'

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Published: 4 June 2021

Last updated: 4 February 2022

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1

Wang, Hong, Run He Shi, and Pu Dong Liu. "Theoretical Simulation and Feasibility Analysis of the Estimation of Crop Leaf Chlorophyll Using Narrow Band NDVI." Applied Mechanics and Materials 651-653 (September 2014): 317–22. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.317.

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Remote sensing technology is one of the best methods for the large-scale monitoring of chlorophyll in crops. This study analyzes the feasibility of estimating the contents of chlorophyll by means of narrow band normalized difference vegetation indices (NDVInb). The reflectance of the two bands forming the NDVInbis from simulations run on the PROSPECT model. A traversal of possible combinations of NDVInbare examined from 400 nm to 800 nm. Our results indicate that, at the leaf level, estimation of chlorophyll content can be identified in NDVInb. Ranges for these bands include: 1) 720-735 nm combined with 400-428 nm; 2) 550-615 nm, 692-701 nm or 707-715 nm combined with 400-432 nm or 462-496 nm; 3) 562-589 nm, 616-662 nm or 729-737 nm combined with 434-454 nm; and 4) 664-687 nm combined with 550-615 nm or 692-701 nm.

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2

Gurlit, W., H. Bösch, H. Bovensmann, J. P. Burrows, A. Butz, C. Camy-Peyret, M. Dorf, et al. "The UV-A and visible solar irradiance spectrum: inter-comparison of absolutely calibrated, spectrally medium resolution solar irradiance spectra from balloon- and satellite-borne measurements." Atmospheric Chemistry and Physics Discussions 4, no. 6 (December 20, 2004): 8439–69. http://dx.doi.org/10.5194/acpd-4-8439-2004.

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Abstract. Within the framework of the ENVISAT/-SCIAMACHY satellite validation, solar irradiance spectra are absolutely measured at moderate resolution in the UV/visible spectral range (in the UV from 316.7–418 nm and the visible from 400–652 nm at a full width half maximum resolution of 0.55 nm and 1.48 nm, respectively) from aboard the azimuth-controlled LPMA/DOAS balloon gondola at around 32 km balloon float altitude. After accounting for the atmospheric extinction due to Rayleigh scattering and gaseous absorption (O3, and NO2), the measured solar spectra are compared with previous observations. Our solar irradiance is +1.6% larger than the re-calibrated Kurucz et al. (1984) solar spectrum (Fontenla et al., 1999, called MODTRAN 3.5) in the visible spectral range (435–650 nm), +1.5% larger in the (370–415 nm) wavelength interval, but −4% smaller in the UV spectral range (316.7–370 nm), when the Kurucz spectrum is convolved to the spectral resolution of our instrument. The same comparison with the SOLSPEC solar spectrum (Thuillier et al., 1997, 1998a, b) confirms the somewhat larger solar irradiance (+1.7%) measured by the balloon instrument from 435–500 nm, but not from 500–650 nm, where the SOLSPEC is −1.3% lower than MODTRAN 3.5. Comparison of the SCIAMACHY solar spectrum from channels 1 to 4 (– re-calibrated by the University of Bremen –) with MODTRAN 3.5 indicates an agreement of +0.2% in the visible spectral range (435–585 nm). With this calibration, the SCIAMACHY solar spectrum is congruent with the balloon observations (−1%) in the 316.7–370 nm wavelength range, but both are up to −5%/−3% smaller than MODTRAN 3.5 and SOLSPEC, respectively. In agreement with findings of Skupin et al. (2002) our study emphasizes that the present ESA SCIAMACHY level 1 calibration is systematically +15% larger in the considered wavelength intervals when compared to all available other solar irradiance measurements.

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Bundy, Jacob J., Jeffrey Forris Beecham Chick, Anthony N. Hage, Ravi N. Srinivasa, Neeraj Chaudhary, Rajiv N. Srinivasa, Venu Vadlamudi, and Joseph J. Gemmete. "#Stroke." Journal of NeuroInterventional Surgery 10, no. 12 (April 20, 2018): e33-e33. http://dx.doi.org/10.1136/neurintsurg-2018-013877.

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PurposeTo describe the stroke-related Twitter network through analysis of the #Stroke hashtag.Materials and methods621 653 tweets containing the #Stroke hashtag were analyzed from 20 March 2012 to 31 January 2018. Twitter activity metrics, engagement, user characteristics, content analysis, and network analysis were obtained using the healthcare social media analytics platform, Symplur Signals.ResultsThe number of users, the number of impressions, and the number of tweets containing the #Stroke hashtag increased by an annual average of 64.9%, 87.7%, and 89.2% over the past 6 years from 20 March 2012 to 31January 2018. 69 371 tweets (11.2%) contained novel content and 48 568 tweets (7.8%) related to patient care. 181 120 (29.1%) tweets contained at least one image and 436 132 tweets (70.2%) contained links to outside resources. Stroke prevention, diabetes, and atrial fibrillation were commonly discussed topics. With regard to engagement, there were 259 438 retweets (41.7%), 366 561 mentions (59.0%), and 8549 replies (1.4%). Physicians and patients authored 52 197 (8.4%) and 41 822 (6.7%) tweets, respectively. Advocate organizations, patients, and non-healthcare individuals most frequently used the #Stroke hashtag on Twitter.ConclusionThe use of the #Stroke hashtag on Twitter has grown significantly over the 6-year study period. The majority of the discussions were held between stroke support groups and non-healthcare-related individuals, with discussion content centering around stroke prevention, stroke symptoms, associated medical conditions, and treatment options.

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4

Hyung, Siek, and Lawrence H. Aller. "High Dispersion Spectra of Bright Planetary Nebulae." Symposium - International Astronomical Union 155 (1993): 193. http://dx.doi.org/10.1017/s007418090017055x.

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The Hamilton Echelle Spectrograph at the coudé focus of the Shane 3 m telescope at Lick Observatory permits us to obtain high resolution spectra of bright planetary nebulae over the spectral range from 3500á to 10300á. Not only is it possible to separate pairs such as λ 5198, 5200 [NI], 4860 HeII and 4861 HI, but one may secure the profiles of Doppler broadened lines. It appears to be possible to separate the HI and HeI contributions of the 3889 line in Hu 1–2. The nebulae most suitable for observation are those of high surface brightness. NGC 7027 was the first nebula intensively studied with this equipment (Keyes et al. 1990); subsequently we have observed NGC 2440, 6537, 6543, 6567, 6572, 6741, 7009, 7662, IC 351, 418, 2149, 2165, 4634, 4997, 5217, Hb 12, and Hu 1–2. In NGC 7009 we measured line fluxes at the ends of major and minor axes. Small compact objects were centered on the slit; other were observed in the bright ring. These planetary nebulae cover a range in excitation level, chemical composition, and evolutionary status.

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5

Dai, Xinyu, and Christopher S. Kochanek. "ChandraObservations of the Gravitational Lenses B1600+434 and B1608+656." Astrophysical Journal 625, no. 2 (June 2005): 633–42. http://dx.doi.org/10.1086/429485.

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6

Weerasekara, Ishanka, Sampath U. B. Tennakoon, and Hilary J. Suraweera. "Pain Level, Range of Motion, and Foot Volume Do Not Differ in Recurrent and First-Time Ankle Sprains." Foot & Ankle Specialist 13, no. 2 (April 15, 2019): 116–22. http://dx.doi.org/10.1177/1938640019843331.

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Objective. This study aims to describe the clinical features in terms of pain perception, ankle range of motion, and foot volume in participants with recurrent ankle sprains compared with first-time sprains. Methods. Individuals with grade I and II ankle sprains were referred to physiotherapy care for further rehabilitation by their general practitioner. Primary outcome measures were range of movement, pain, and foot volume. Recurrences were described according to engagement in sport. Results. A total of 115 participants were recruited (age = 22.2 ± 6.9 years; female, 84). Neither pain level (P = .822), nor range of motion (dorsiflexion P = .452; plantar flexion P = .436; inversion P = .383; eversion P = .657), nor foot volume (P = .654) were significantly different between the groups: individuals with first-time sprain or with recurrences. Conclusion. Pain and high existence of other lower-limb injuries were reported disregarding the presence of a recurrence. Clinically, it is difficult to differentiate recurrent sprain from a first-time ankle sprain by means of foot volume, range of movement, or pain intensity.

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7

Mukherjee, K., and G. Sahoo. "Performance Analysis of Cloud Computing using Multistage Ant System." International Journal of Computer Applications 1, no. 20 (February 25, 2010): 75–80. http://dx.doi.org/10.5120/418-617.

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Suganya, R., K. Priyadharsini, and Dr S. Rajaram. "Intensity Based Image Registration by Maximization of Mutual Information." International Journal of Computer Applications 1, no. 20 (February 25, 2010): 1–7. http://dx.doi.org/10.5120/432-637.

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9

TABER, H. "Isolation and Properties of Cytochrome a Deficient Mutants of Bacillus subtilis." Microbiology 81, no. 2 (February 1, 2000): 435–44. http://dx.doi.org/10.1099/00221287-81-2-435.

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Summary: Three classes of cytochrome a deficient mutants of Bacillus subtilis have been isolated. These classes were defined by concentration ratios of cytochromes a, b and c relative to the parent strain, and by responses to non-fermentable substrates. The cytochrome deficiencies were not due to blocks in haem biosynthesis or to failure of the control mechanisms which alter the respiratory chain during growth of B. subtilis. Mutational loss of cytochrome a did not reduce proportionately the rate of oxygen consumption by late exponential phase cells, although exponential growth rates were generally lower than the parent strain. The cytochrome system of wild-type B. subtilis appears to contain cytochromes a (or a+a3), b, c, c1, and o. A previously unreported absorption maximum at 617 nm was discovered, which was elevated in some of the cytochrome a deficient mutants. In these mutants, a new maximum also appeared at 627 nm.

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Rosati, Luca, Angelo Spena, and Fedora Quattrocchi. "Application of the ITS-UCD Model for the Assessment of CO2 Compression and Transport Costs for the Simeri Crichi - Botricello1 Route in a Theoretical CCS Retrofit Project of the Simeri Crichi Thermal Power Plant." TECNICA ITALIANA-Italian Journal of Engineering Science 65, no. 2-4 (July 30, 2021): 401–8. http://dx.doi.org/10.18280/ti-ijes.652-438.

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The power plant of Simeri Crichi (Calabria Region, Italy) under study was already managed by Edison S.p.A. and it is fueled by natural gas. This study is dealing with the hypothesis to perform a retrofit device of the plant, with the addition of a standard “CO2 Capture”, able to perform a capture rate up to 90%; it has been proposed here the sizing of the compression station and the pipeline which connects the plant to the injection site Botricello 1, studied in the frame of a gross screening of the storage sites in the Calabria Region in Italy. This study took into account the costs of construction, operation and maintenance (O&M) of both the compression plant and the sound pipeline. Eventually, an estimation of the gross static storage capacity of the Botricello1 reservoir is provided.

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Osei Asibey, Benedict, Seth Agyemang, and Augustina Boakye Dankwah. "The Internet Use for Health Information Seeking among Ghanaian University Students: A Cross-Sectional Study." International Journal of Telemedicine and Applications 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/1756473.

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The aim of the study was to investigate university students’ use of the Internet for health purpose in the Ghanaian context. The study employed a quantitative cross-sectional design. A total of 650 out of 740 students selected from 3 different universities participated, giving a response rate of 87.7% (650/740). Data were obtained using questionnaires and frequency and percentages were used to analyze data. The results show that university students are active users of the Internet as 78.3% (509/650) used Internet daily and 67.7% (440/650) use Internet for health purposes, for reasons including availability and ease of accessing information, privacy, confidentiality, and affordability. Use of Internet was constrained by unreliable and slow connection, high cost of Internet, and unreliable power supply. Also, 72.4% (315/435) used the online health information obtained as a basis for lifestyle change and only 39.5% (170/430) consulted health professionals after obtaining online information. The study concludes that students use Internet to seek online health support. The use of Internet to communicate with young people in relation to their health must therefore be explored. There is the need to be aware of online safety issues for young adults, including the need to provide information on privacy options.

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Zeng, Xiang-Chao, Shi-Hai Xu, Jian Gu, and Dong-Sheng Deng. "1-Methyl-6,7-dihydropyrrolo[2,3-c]azepine-4,8(1H,5H)-dione." Acta Crystallographica Section E Structure Reports Online 61, no. 3 (February 26, 2005): o795—o796. http://dx.doi.org/10.1107/s1600536805005532.

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13

Clark, Robert B., Jorge L. Cervantes, Mark W. Maciejewski, Vahid Farrokhi, Reza Nemati, Xudong Yao, Emily Anstadt, et al. "Serine Lipids of Porphyromonas gingivalis Are Human and Mouse Toll-Like Receptor 2 Ligands." Infection and Immunity 81, no. 9 (July 8, 2013): 3479–89. http://dx.doi.org/10.1128/iai.00803-13.

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ABSTRACTThe total cellular lipids ofPorphyromas gingivalis, a known periodontal pathogen, were previously shown to promote dendritic cell activation and inhibition of osteoblasts through engagement of Toll-like receptor 2 (TLR2). The purpose of the present investigation was to fractionate all lipids ofP. gingivalisand define which lipid classes account for the TLR2 engagement, based on bothin vitrohuman cell assays andin vivostudies in mice. Specific serine-containing lipids ofP. gingivalis, called lipid 654 and lipid 430, were identified in specific high-performance liquid chromatography fractions as the TLR2-activating lipids. The structures of these lipids were defined using tandem mass spectrometry and nuclear magnetic resonance methods.In vitro, both lipid 654 and lipid 430 activated TLR2-expressing HEK cells, and this activation was inhibited by anti-TLR2 antibody. In contrast, TLR4-expressing HEK cells failed to be activated by either lipid 654 or lipid 430. Wild-type (WT) or TLR2-deficient (TLR2−/−) mice were injected with either lipid 654 or lipid 430, and the effects on serum levels of the chemokine CCL2 were measured 4 h later. Administration of either lipid 654 or lipid 430 to WT mice resulted in a significant increase in serum CCL2 levels; in contrast, the administration of lipid 654 or lipid 430 to TLR2−/−mice resulted in no increase in serum CCL2. These results thus identify a new class of TLR2 ligands that are produced byP. gingivalisthat likely play a significant role in mediating inflammatory responses both at periodontal sites and, potentially, in other tissues where these lipids might accumulate.

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Myakin, Timothey. "A woman's right is a goddess's right? The meaning and function of the image of Helen in the poetry of Sappho (in light of recent papyrology’s discoveries)." ΣΧΟΛΗ. Ancient Philosophy and the Classical Tradition 14, no. 1 (2020): 184–206. http://dx.doi.org/10.25205/1995-4328-2020-14-1-184-206.

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The image of the Helen in Sapph. Fr. 16 (Neri–Cinti) is analyzed in detail on the basis of the new papyrus fragments which were published by Dirk Obbink (Obbink, 2016a). According to the results of the comparative analysis, it is concluded that the form of the aoristic active participle from the verb περιέχειν, which is used in Sapph. Fr. 16, refers not only to the vocabulary of Homer, but also to the vocabulary of legal documents (cf.: Hom. Il. XV, 653–654; Hellanic., Fr. 31, 50 Jacoby; IG XII(2), №58, 8–9 etc.). Thus, we confirm a special significance of the Sapph. Fr. 16, which is a "program" song of Sappho’s thiasos (cf. Bierl, 2003).

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Wahlen, Martina. "Klute, Wilfried: Deutsch-Zensuren : Eine Handreichung zur Bewertungspraxis auf der Sekundarstufe 11. München : Ehrenwirth, 1985 (Unterrichtspraxis). - ISBN 3-431-02701-6. 116 Seiten, DM 20,-." Informationen Deutsch als Fremdsprache 13, no. 5-6 (December 1, 1986): 475–76. http://dx.doi.org/10.1515/infodaf-1986-135-657.

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Qiao, Yina, Ting Jin, Shengdong Guan, Shaojie Cheng, Siyang Wen, Huan Zeng, Maojia Zhao, et al. "Long non-coding RNA Lnc-408 promotes invasion and metastasis of breast cancer cell by regulating LIMK1." Oncogene 40, no. 24 (June 2, 2021): 4198–213. http://dx.doi.org/10.1038/s41388-021-01845-y.

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AbstractInvasion and metastasis are the leading causes of death in patients with breast cancer (BC), and epithelial-mesenchymal transformation (EMT) plays an essential role in this process. Here, we found that Lnc-408, a novel long noncoding RNA (lncRNA), is significantly upregulated in BC cells undergoing EMT and in BC tumor with lymphatic metastases compared with those without lymphatic metastases. Lnc-408 can enhance BC invasion and metastasis by regulating the expression of LIMK1. Mechanistically, Lnc-408 serves as a sponge for miR-654-5p to relieve the suppression of miR-654-5p on its target LIMK1. Knockdown or knockout of Lnc-408 in invasive BC cells clearly decreased LIMK1 levels, and ectopic Lnc-408 in MCF-7 cells increased LIMK1 expression to promote cell invasion. Lnc-408-mediated enhancement of LIMK1 plays a key role in cytoskeletal stability and promotes invadopodium formation in BC cells via p-cofilin/F-actin. In addition, the increased LIMK1 also facilitates the expression of MMP2, ITGB1, and COL1A1 by phosphorylating CREB. In conclusion, our findings reveal that Lnc-408 promotes BC invasion and metastasis via the Lnc-408/miR-654-5p/LIMK1 axis, highlighting a novel promising target for the diagnosis and treatment of BC.

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Jun-ichi Nishizawa, P. Plotka, H. Makabe, and T. Kurabayashi. "GaAs TUNNETT diodes oscillating at 430-655 GHz in CW fundamental mode." IEEE Microwave and Wireless Components Letters 15, no. 9 (September 2005): 597–99. http://dx.doi.org/10.1109/lmwc.2005.855381.

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18

Naveira, H., E. Hauschteck-Jungen, and A. Fontdevila. "Evolutionary history of Drosophila buzzatii. XV. Meiosis of inversion heterozygotes in backcross hybrids between D. buzzatii and its sibling D. koepferae." Genome 32, no. 2 (April 1, 1989): 262–70. http://dx.doi.org/10.1139/g89-438.

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Interspecific F1 hybrid females between Drosophila koepferae and D. buzzatii are fertile, but hybrid males are sterile. By successive backcrossing of hybrid females to D. buzzatii males, it was possible to reduce progressively the genomic contribution of D. koepferae to the hybrid karyotype. Finally, only selected chromosome sections containing inversions restricted to D. koepferae were individually left in the otherwise D. buzzatii karyotype, namely: 2 C2b – F4a (j9m9n9), 3 C5a – G1b (k2), 4 E2a – G2f (m), and 5 C5d – F2h[Formula: see text]. Any of these sections produces hybrid male sterility in heterozygous condition. The present paper deals with the influence of these chromosome sections on meiosis. The observed abnormalities varied according to the introgressed segment borne by the hybrid males. The section from chromosome 2 of D. koepferae, representing about 6.7% of the total polytene karyotype, had the most drastic effect, giving rise to the same phenotype observed in the F1 hybrids, which was characterized by the complete lack of meiotic stages. The disruption produced by the chromosome section containing inversion 3 k2 (4.9% of the karyotype) was only a little more severe than that containing [Formula: see text] (4.2% of the karyotype), and both may be distinguished only quantitatively. Anaphase I exhibited precocious separation of sister chromatids and aberrant segregations; metaphase II was also always abnormal, with the chromosomes separated into their constituent chromatids and no apparent junction between sister centromeres; anaphase II rarely took place, and then it was always highly abnormal, with aberrant segregations and frequent tripolar or tetrapolar spindles; finally, cytokinesis also failed quite often, giving rise to multinuclear spermatids. The introgression of the chromosome segment containing inversion 4 m (3.2% of the karyotype) produced the least deviation from normal meiosis, which consisted simply of a relative increase in the number of metaphase II among the cells undergoing meiosis. These results show a positive correlation between the size of the introgressed segments and the importance of the disturbances they bring about. A similarity with some described meiotic-sterile mutations is suggested.Key words: Drosophila, hybrids, meiosis, chromosomal inversions.

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Brovkin, Vladimir. "The critics of religion in early Hellenistic philosophy." ΣΧΟΛΗ. Ancient Philosophy and the Classical Tradition 13, no. 2 (2019): 637–47. http://dx.doi.org/10.25205/1995-4328-2019-13-2-637-647.

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This article discusses the socio-historical conditions of the formation of criticism of religious representations in Greek philosophy in the period of early Hellenism. It is established that the formation of this criticism according to Epicurus, Theodorus, Bion and Euhemerus was influenced by the following factors. First, it is the rapid development of the cult of Hellenistic kings. Secondly, it is the emergence of new influential gods, the growing popularity of the Eastern gods in Greece, and religious syncretism. Thirdly, it is a gradual weakening of the traditional cult of the Olympian gods. Fourthly, it is the crisis of the polis, which contributed to the growth of individualism, weakening of religious and moral norms.

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20

LARKIN, C., C. van DONKERSGOED, A. MAHDI, P. JOHNSON, B. McNAB, and J. ODUMERU. "Antibiotic Resistance of Campylobacter jejuni and Campylobacter coli Isolated from Hog, Beef, and Chicken Carcass Samples from Provincially Inspected Abattoirs in Ontario." Journal of Food Protection 69, no. 1 (January 1, 2006): 22–26. http://dx.doi.org/10.4315/0362-028x-69.1.22.

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Campylobacter jejuni is one of the most common causes of bacterial foodborne infection in the United States, and there are reports of resistance of Campylobacter spp. to antimicrobial agents used for the treatment of gastroenteritis. The purpose of this study was to determine the antimicrobial resistance patterns of Campylobacter spp. isolated from hog, beef, and chicken carcasses from provincially inspected abattoirs in Ontario. The agar dilution method was performed to measure antimicrobial resistance of the isolates. Antimicrobial resistance of Campylobacter isolates from hogs (n = 401), beef (n = 21), and chicken (n = 435) to ampicillin, azithromycin, chloramphenicol, ciprofloxacin, clindamycin, erythromycin, gentamicin, nalidixic acid, streptomycin, and tetracycline was determined. Resistance of chicken, hog, and beef isolates was 14.3, 18.2, and 9.5% to ampicillin; 17.9, 67.3, and 38.1% to azithromycin; 0, 0.5, and 0% to chloramphenicol; 3.7, 1.2, and 0% to ciprofloxacin; 2.3, 46.6, and 4.8% to clindamycin; 6.7, 43.6, and 4.8% to erythromycin; 0.2, 0, and 0% to gentamicin; 5.1, 10.7, and 0% to nalidixic acid; 13.6, 57.4, and 4.8% to streptomycin; and 52.6, 44.1, 42.9% to tetracycline, respectively. The hog isolates had the greatest resistance to seven of the ten antimicrobials tested. Results of this study confirm the existence of antimicrobial resistance of Campylobacter to various antimicrobial agents, especially ciprofloxacin and erythromycin, commonly used for treatment of campylobacteriosis in humans.

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Herzog, H., K. P. Schäfers, S. Käpplinger, O. Schober, and J. Eckardt. "Impact of the lower energy threshold on the NEMA NU2-2001 count-rate performance of a LSO based PET-CT scanner." Nuklearmedizin 47, no. 05 (2008): 210–14. http://dx.doi.org/10.3413/nukmed-0148.

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SummaryThe aim of this study was to investigate the impact of the lower energy threshold (LET) on the NEMA NU2–2001 count-rate performance of a LSO-based PET scanner (Siemens PET-CT Biograph Sensation 16). The quantitative measurements were focused on three different aspects: noise equivalent count rate (NEC), scatter fraction, and absolute sensitivity. Methods: According to the NEMA-NU2–2001 protocol count-rate-performance (NEC-2R, scatter fraction) and sensitivity were evaluated performing serial measurements at LETs of 350, 375, 400, 410, 420, 430, 440, and 450 keV (the upper energy threshold was fixed to 650 keV). NEMA protocols were adapted to account for the intrinsic radioactivity of 176Lu in the LSO crystals. Results: Up to a radioactivity concentration of 8 kBq/ml the highest NECrates were obtained at an LET of 410 keV, between 8 and 20 kBq/ml at an LET of 420 keV and above 20 kBq/ml at an LET of 430 keV. The overall NEC maximum was 67 kcps at 430 keV (at 28 kBq/ml). The minimum scatter fraction was measured at a radioactivity concentration of ~ 0.5 kBq/ml. The scatter fraction decreased continuously from 45% at an energy threshold of 350 keV to 24% at 450 keV. The maximum sensitivity of 5.8 kcps/MBq, was obtained at an LET of 350 keV and the minimum sensitivity of 4.2 kcps/MBq at an LET of 450 keV. At the LET with the maximum NEC-rate (430 keV) the sensitivity was 4.8 kcps/MBq. Conclusion: The optimal count-rate performance of the LSO-based PET system was found at LETs between 410 keV and 430 keV depending on the actual radioactivity concentration placed in the scanner. A global maximum in NEC count rate was obtained at an LET of 430 keV.

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Baniyas, Noura, Mohamud Sheek-Hussein, Nouf Al Kaabi, Maitha Al Shamsi, Maitha Al Neyadi, Rauda Al Khoori, Suad Ajab, Muhammad Abid, Michal Grivna, and Fikri M. Abu-Zidan. "COVID-19 knowledge, attitudes, and practices of United Arab Emirates medical and health sciences students: A cross sectional study." PLOS ONE 16, no. 5 (May 12, 2021): e0246226. http://dx.doi.org/10.1371/journal.pone.0246226.

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The COVID-19 pandemic is the largest viral pandemic of the 21st century. We aimed to study COVID-19 knowledge, attitudes, and practices (KAP) among medical and health sciences students in the United Arab Emirates (UAE). We performed a cross-sectional study between 2 June and 19 August 2020. The survey was distributed online using Survey Monkey. It was conducted in English and comprised two parts: socio-demographic characteristics, and KAP towards COVID-19. 712 responses to the questionnaire were collected. 90% of respondents (n = 695) were undergraduate students, while 10% (n = 81) were postgraduates. The majority (87%, n = 647) stated that they obtained COVID-19 information from multiple reliable sources. They were highly knowledgeable about the COVID-19 pandemic, but 76% (n = 539) did not recognize its routes of transmission. Medical students were significantly more knowledgeable compared with allied health students (P<0.0001, Mann Whitney U test) but there was no difference in knowledge between undergraduate and postgraduate students (P = 0.14, Mann Whitney U test). Medical students thought that more could be done to mitigate the COVID-19 situation compared with the allied health students (66.2% compared with 51.6%, p = 0.002 Fisher’s Exact test). 63% (n = 431) were worried about getting COVID-19 infection, while 92% (n = 633)) were worried that a family member could be infected with the virus. 97% (n = 655) took precautions when accepting home deliveries, 94% (n = 637) had been washing their hands more frequently, and 95% (n = 643) had been wearing face masks. In conclusion, medical and health sciences students in the UAE showed high levels of knowledge and good attitudes and practices towards the COVID-19 pandemic. Nevertheless, they were worried about themselves or their family members becoming infected. Medical students had more knowledge about COVID-19 pandemic which was reflected in their opinion that more can be done to mitigate its effects.

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Zeng, Xiang-Chao. "3-Bromo-1-methyl-6,7-dihydropyrrolo[2,3-c]azepine-4,8(1H,5H)-dione." Acta Crystallographica Section E Structure Reports Online 62, no. 12 (November 10, 2006): o5505—o5507. http://dx.doi.org/10.1107/s1600536806046289.

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FU, ZHIXI, CAIFEI ZHANG, and TIANGANG GAO. "The identity of Aster lushiensis (Asteraceae)." Phytotaxa 105, no. 1 (May 30, 2013): 29. http://dx.doi.org/10.11646/phytotaxa.105.1.5.

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Aster lushiensis (J.Q.Fu 1983: 110) Brouillet, Semple & Y.L.Chen (2011: 607) (Astereae, Asteraceae) was recently combined from the genus Gymnaster Kitamura (1937: 301) (=Miyamayomena Kitamura (1982: 409)) without a study of specimens. It is only known from the type specimens collected in Lushi County, Henan Province, China. Examination of morphological characters of types showed that it is conspecific with Chrysanthemum vestitum (Hemsley 1888: 438) Stapf (1933: t. 9330) (Anthemideae; Shih et al. 2011), and is here reduced to a synonym of the latter species.

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Kasum, B., RH Prager, and C. Tsopelas. "Dihydroindol-7(6H)-ones and 6,7-Dihydropyrrolo[2,3-c]azepine-4,8(1H,5H)-dione." Australian Journal of Chemistry 43, no. 2 (1990): 355. http://dx.doi.org/10.1071/ch9900355.

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3-Methylcyclohexenones may be converted into dihydroindol-7(6H)-ones by conversion of the epoxide into the 2-benzylamino-3-methylcyclohexenone, which reacts with dimethyl- formamide dimethyl acetal to give N-benzyldihydroindol-7(6H)-ones. The limitations of the process are discussed, as is the failure to convert the dihydroindol-7(6H)-ones into dihydropyrroloazepinediones by Beckmann or Schmidt rearrangements. An example of the latter compounds was made by a simple procedure from pyrrolecarboxylic acid.

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Nemes, Gergő. "The resurgence properties of the large-order asymptotics of the Hankel and Bessel functions." Analysis and Applications 12, no. 04 (June 17, 2014): 403–62. http://dx.doi.org/10.1142/s021953051450033x.

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The aim of this paper is to derive new representations for the Hankel and Bessel functions, exploiting the reformulation of the method of steepest descents by Berry and Howls [Hyperasymptotics for integrals with saddles, Proc. R. Soc. Lond. A 434 (1991) 657–675]. Using these representations, we obtain a number of properties of the large-order asymptotic expansions of the Hankel and Bessel functions due to Debye, including explicit and numerically computable error bounds, asymptotics for the late coefficients, exponentially improved asymptotic expansions, and the smooth transition of the Stokes discontinuities.

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Lehtihet, Mikael, Dominic-Luc Webb, Richard E. Honkanen, and Åke Sjöholm. "Corrigendum to “Glutamate inhibits protein phosphatases and promotes insulin exocytosis in pancreatic b-cells” [Biochem. Biophys. Res. Commun. 438 (2005) 601–607]." Biochemical and Biophysical Research Communications 441, no. 1 (November 2013): 273. http://dx.doi.org/10.1016/j.bbrc.2013.10.061.

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Chasqui, Revista. "El meme en Internet. Identidad y usos sociales (Gabriel Pérez Salazar)." Chasqui. Revista Latinoamericana de Comunicación, no. 136 (December 31, 2017): 417. http://dx.doi.org/10.16921/chasqui.v0i136.3522.

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Родина, И. В., О. Д. Линников, and А. Ю. Сунцов. "Сорбция ионов меди угольным сорбентом МИУ-С." Сорбционные и хроматографические процессы 17, no. 5 (February 22, 2018): 725–32. http://dx.doi.org/10.17308/sorpchrom.2017.17/432.

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Изучены сорбционные свойства по отношению к ионам меди угольного сорбента марки МИУ-С4. Исследования проводились на модельном растворе сульфата меди(II), содержащем дополнительно 400 мг/дм3 сульфата натрия. Показано, что угольный сорбент марки МИУ-С4 способен очищать загрязнённые растворы от ионов двухвалентной меди путём сорбции их на своей поверхности по механизму простой физической адсорбции, описываемой уравнением Ленгмюра. Определены параметры этого уравнения для разных значений рН модельного раствора. С повышением рН очищаемого раствора от 4 до 6.7 адсорбция ионов меди на поверхности МИУ-С4 возрастает (диапазоны рН<4 и рН>6.7 не были исследованы), что обусловлено ростом ёмкости монослоя МИУ-С4. При этом наблюдается также возрастание константы адсорбционного равновесия

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Wechalekar, H., B. P. Setchell, W. G. Breed, M. Ricci, C. Leigh, and E. Peirce. "437. Whole body heat stress induces selective germ cell apoptosis in mice." Reproduction, Fertility and Development 20, no. 9 (2008): 117. http://dx.doi.org/10.1071/srb08abs437.

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Introduction: In scrotal mammals, heat stress (43°C/ 20 min) to the scrotum results in germ cell death in the testes1, abnormal spermatozoa, and infertility2 whereas two days of whole body heating (36°C, 12 h/ day) reduces testes weight, sperm numbers and fertility3. The aim of the present study was to determine the intratesticular effects of whole body heating on germ cell maturation and apoptosis. Methods: C57BL/6 mice (n = 16) were housed at 37–38°C for 8 h/ day for 3 days while controls (n = 4) were kept at 23–24°C. Animals from heat treated (n = 4), and control groups (n = 1) were sacrificed at 16 h, 7, 14 and 21 days post exposure to heat. Testes were weighed and analysed by t-test. In testes from each animal, two sections 70µm apart were end labelled for TdT-mediated-dUTP nick (TUNEL). Apoptosis was determined in 200 seminiferous tubules by a colour threshold set in the particle analysis program (Olympus).The tubules were staged as I-VI (early), VII-VIII, IX-X and XI-XII (late) and results analysed using Wilcoxon test. Results: The weights of testes were significantly reduced in heat-treated animals (P < 0.05) at 16 h, 7 and 14 days with no significant difference at 21 days. Apoptosis was significantly higher in the heat-treated group in stages I-VI and XI-XII at 16 h, 7 and 14 days (P < 0.05). In addition, in stages VII-VIII and IX-X apoptosis was significantly higher at 16 h (P < 0.05) with no statistical difference between other time intervals. By day 21, the levels of apoptosis did not differ significantly from the controls in any of the stages (P > 0.05).Conclusion: Whole body heat stress can induce stage and cell specific degeneration of the germ cells in the seminiferous epithelium. The germ cells undergoing apoptosis are spermatogonia, primary spermatocytes and early spermatids. In addition, heat stress produces significant apoptosis of germ cells in the hormone dependent stages VII-VIII immediately after heat stress. (1) Rockett, J.C. et al. (2001) Biol. Reprod. 65:229–239. (2) Banks, S. et al. (2005) Reproduction 129:505–514. (3) Yaeram, J. et al. (2006) Reprod. Fert. Dev. 18:647–653.

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Contardi, Magali. "No proprietary protection for individual non-geographical components of protected geographical denominations, says AG Hogan." Journal of Intellectual Property Law & Practice 14, no. 11 (September 20, 2019): 838–40. http://dx.doi.org/10.1093/jiplp/jpz121.

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Chen, Yu, Yu Long Song, and Fu Rong Huo. "Location Technology of Correlation Peaks Based on Joint Transform Correlator." Applied Mechanics and Materials 651-653 (September 2014): 451–54. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.451.

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By comparing the similarity of their contour information, hybrid photoelectric joint transform correlator (JTC) is used to recognize the specific target. An effective method to increase the recognition rate is to extract the contour information of target and template and decrease the noise interference in image background. The principle of joint transform correlator is given in this paper. To increase the recognizing rate, a mask algorithm is presented, with which the coordinate of the correlation peaks can be located precisely. Before the mask algorithm, edge extraction with Robert operator is carried out to enhance the target contour information and reduce the background noise. Amounts of experiments prove the mask algorithm can locate the correlation peaks precisely. As an example, an experimental result is given with a car as the detected target. The coordinate of this car is (362, 438). Experimental results confirm the feasibility and effectiveness of the mask algorithm.

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Berry, Matthew, Mark Nelson, Brian Monaghan, and Ben Whale. "The effects of oscillating boundary conditions on thermal ignition." ANZIAM Journal 61 (June 16, 2020): C45—C58. http://dx.doi.org/10.21914/anziamj.v61i0.15035.

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We investigate the effect that oscillating ambient temperatures have on the ignition times of supercritical stockpiles. Large stockpiles are exposed to seasonal and diurnal temperature variation. We analyse the effects of seasonal temperature variation. When considering ignition within a year of construction, stockpiles built in spring ignited with a lower critical parameter than those built at other times. Consequently, seasonal temperature variation needs to be accounted for when predicting stockpile ignition times. References P. C. Bowes. Self-heating: evaluating and controlling the hazards. Dept. of the Environment, Building Research Establishment, 1984. R. J. Longbottom, B. J. Monaghan, G. Zhang, D. J. Pinson, and S. J. Chew. Self-sintering of BOS filter cake for improved recyclability. ISIJ Int., 59(3):432–441, 2019. doi:10.2355/isijinternational.ISIJINT-2018-627. V. Novozhilov. Thermal explosion in oscillating ambient conditions. Sci. Rep., 6:29730, 07 2016. doi:10.1038/srep29730. N. C. Roy. Convection characteristics in a closed vessel in the presence of exothermic combustion and ambient temperature oscillations. Int. J. Heat Mass Trans., 116:655–666, 2018. doi:10.1016/j.ijheatmasstransfer.2017.09.058.

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Clausen, Johan. "Comment to “A method for smoothing multiple yield functions” by Wilkins, Spencer, Jain and Gencturk. Int J Numer Methods Eng. 2020; 121:434–449." International Journal for Numerical Methods in Engineering 121, no. 24 (September 4, 2020): 5784–88. http://dx.doi.org/10.1002/nme.6507.

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Filosa, Elsa. "Intertestualità tra Decameron e De mulieribus claris: La tragica storia di Tisbe e Piramo." Colloquium, no. 9788879166539 (September 2013): 153–60. http://dx.doi.org/10.7359/653-2013-filo.

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Le intertestualità traedimostrano come, tra il Boccaccio novelliere in volgare e il Boccaccio biografo in latino, la distanza sia solo apparente. Nel caso particolare, la storia di Gerolamo e Salvestra (. 4.8), ispirata in parte dalla favola di Piramo e Tisbe raccontata da Ovidio (. 4.55-62), offre degli addentellati decameroniani nella versione boccacciana inclusa nel.

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Kharseeva, Galina G., E. O. Mangutov, O. M. But, A. V. Chepusova, and E. L. Alutina. "ANALYSIS OF THE FREQUENCY OF ISOLATION OF CORYNEBACTERIA NON-DIPHTHERIA FROM PATIENTS WITH INFLAMMATORY DISEASES OF THE RESPIRATORY TRACT." Russian Clinical Laboratory Diagnostics 64, no. 7 (October 7, 2019): 430–34. http://dx.doi.org/10.18821/0869-2084-2019-64-7-430-434.

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Corynebacteria non-diphtheria and, in particular, C. pseudodiphtheriticum species that are closely related to C. propinquum and C. striatum form a group of new respiratory pathogens leading to the development of bronchitis, tracheitis, exacerbation of chronic obstructive pulmonary diseases, nosocomial pneumonia and other pathology. The goal is to analyze the frequency of the release of Сorynebacteria non-diphtheria from the upper respiratory tract of patients with various inflammatory diseases of the respiratory tract. Strains of Сorynebacteria non-diphtheria (C. pseudodiphtheriticum, C. propinquum, C. accolens, et al.), isolated from patients with inflammatory diseases of the respiratory tract (60 pcs.) and practically healthy individuals (31 pcs.) were studied. Identification of Сorynebacteria was performed using the method of mass spectrometry (MALDI-ToFMS). Сorynebacteria non-diphtheria in the amount of 105 and higher were more frequently detected with the development of chronic tonsillitis (60.0%) and nasopharyngitis (30%). The strains of C. pseudodiphtheriticum (40.0±6.4%) and the closely related species C. propinquum (21.7±5.3%) were mainly found; much less often - C. accolens (8.3±3.6%), C. afermentans (6.7±3.3%), et al. In 86.7% of cases, Corynebacteria non-diphtheria were isolated from children. In chronic tonsillitis, C. pseudodiphtheriticum and the closely related species of C. propinquum were isolated more often; in nasopharyngitis and bronchitis - С. pseudodiphtheriticum. Isolation of Corynebacteria non-diphtheria and, especially, C. pseudodiphtheriticum, C. propinquum, C. accolens species from patients with inflammatory diseases of the respiratory tract in the amount of 105 and above, if there are no other pathogenic microorganisms in the role of microbial associates, of clinical importance.

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Harvey, Ramon. "The Legal Epistemology of Qur'anic Variants: The Readings of Ibn Masʿūd in Kufan fiqh and the Ḥanafī madhhab." Journal of Qur'anic Studies 19, no. 1 (February 2017): 72–101. http://dx.doi.org/10.3366/jqs.2017.0268.

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The companion Ibn Masʿūd (d. 32/652–653) has long been recognised for the variance of his Qur'anic qirāʾa (‘reading’, or ‘recitation’) from the canonical ʿUthmānī codex. His reading continued to enjoy popularity for at least a century within Kufa, the place of origin for much of the Ḥanafī madhhab's jurisprudential corpus. This article analyses Masʿūdian variants with legal implications in the doctrine of the early jurist Ibrāhīm al-Nakhaʿī (d. 96/715), the seminal writings ascribed to Muḥammad b. al-Ḥasan al-Shaybānī (d. 189/805), as well as the furūʿ and uṣūl works of key Ḥanafī figures from the fourth/tenth and fifth/eleventh centuries: al-Jaṣṣāṣ (d. 370/981), al-Qudūrī (d. 428/1036–1037) and al-Sarakhsī (d. 483/1090). Close study of these figures’ use of Masʿūdian variants indicates that while their non-canonicity demanded a compelling solution, their quasi-Qur'anic status presented opportunities within the arena of juristic debate. Furthermore, the manner in which they were ultimately accommodated within the practical and theoretical toolkit of the Ḥanafī school illustrates broader developments in its epistemology of revelation, abrogation and transmission.

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Fujii, S., R. Okamoto, and K. Suzuki. "Erratum to “Unitary-model-operator approach to Λ hypernuclei” [Nucl. Phys. A 651 (1999) 411–433]." Nuclear Physics A 676, no. 1-4 (August 2000): 475–76. http://dx.doi.org/10.1016/s0375-9474(00)00285-2.

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Levkin, Pavel A., Eberhard Schweda, Heinz-Jürgen Kolb, Volker Schurig, and Remir G. Kostyanovsky. "Solid-phase racemic compound–conglomerate transformation of 2,3:6,7-dibenzobicyclo[3.3.1]nona-2,6-diene-4,8-dione." Tetrahedron: Asymmetry 15, no. 9 (May 2004): 1445–50. http://dx.doi.org/10.1016/j.tetasy.2004.03.020.

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Levkin, Pavel A., Yuri A. Strelenko, Konstantin A. Lyssenko, Volker Schurig, and Remir G. Kostyanovsky. "Temperature-dependent racemic compound-conglomerate crystallization of 2,3:6,7-dibenzobicyclo[3.3.1]nona-2,6-diene-4,8-dione." Tetrahedron: Asymmetry 14, no. 14 (July 2003): 2059–66. http://dx.doi.org/10.1016/s0957-4166(03)00399-9.

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Xu, Na, Yun-Yin Niu, and Seik Weng Ng. "6,7-Dihydro-5H-1,4-diazepino[1,2,3,4-lmn][1,10]phenanthroline-4,8-diium tris(thiocyanato-κN)cuprate(I)." Acta Crystallographica Section E Structure Reports Online 66, no. 10 (September 18, 2010): m1280. http://dx.doi.org/10.1107/s1600536810036779.

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Amaral, Leila. "TORRE, Renée de la; ZÚÑIGA, Cristina Gutiérrez; HUET, Nahayeilli Juárez (coord.). Variaciones y Apropriaciones Latinoamericanas Del New Age." Revista de Estudos da Religião (REVER). ISSN 1677-1222 14, no. 1 (June 30, 2014): 327. http://dx.doi.org/10.21724/rever.v14i1.20287.

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Resenha: TORRE, Renée de la; ZÚÑIGA, Cristina Gutiérrez; HUET, Nahayeilli Juárez (coord.). Variaciones y Apropriaciones Latinoamericanas Del New Age. México: Publicaciones de la Casa Chata, 2013, ISBN: 978-607-486-218-8, 436 p.

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Piwpankaew, Yotthachai, Supa Sakulsirirat, Sunee Nitisinprasert, Thu-Ha Nguyen, Dietmar Haltrich, and Suttipun Keawsompong. "Cloning, secretory expression and characterization of recombinant β-mannanase from Bacillus circulans NT 6.7." SpringerPlus 3, no. 1 (2014): 430. http://dx.doi.org/10.1186/2193-1801-3-430.

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Khodzhieva, M. V., V. A. Skvortsova, T. E. Borovik, L. S. Namazova-Baranova, T. V. Margieva, T. V. Bushueva, O. S. Melnichuk, and S. V. Nekrasova. "Evaluating the Physical Development of Early Age Schoolchildren (7–10 Years): Cohort Study Results." Pediatric pharmacology 13, no. 4 (November 15, 2016): 362–66. http://dx.doi.org/10.15690/pf.v13i4.1608.

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Background:Misbalance between energy intake and consumption is considered the main reason of obesity. However, over the recent years there has been a lot of emerging data concerning early origins of obesity that forms during intrauterine development and/or early age periods.Objective:Our aim was to study how physically developed are the children of early school ages.Methods:The study included children aged 7 to 10 years. Their physical development was assessed with the WHO AnthroPlus (2009) software.Results:652 children were examined. Of them, balanced development was found in: according to the WAZ index (body mass/age) — 466/530 (87,9%) schoolchildren; HAZ index (height/age) — 620/652 (95,1%); BAZ (body mass index/age) — only 438/652 (67,2%) children. Excessive body weight was found in 61 (18,8%) of the 324 girls and 65 (19,8%) of the 328 boys (р = 0,891), obesity — in 24 (7,4%) and 52 (15,9%) children correspondingly (р = 0,038).Conclusion:Having evaluated the physical development of early aged schoolchildren between the ages of 7 and 10 years, it is possible to state that there is evidence in favour of higher readings of mass-weight indexes as compared to the standard WHO population. Every third early age schoolchild can have physical development deviations, at the same time boys are obese twice as often as girls.

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Peláez, Rodolfo, and Orlando Merino. "Tragedia griega." Estudios Cinematográficos, no. 2 (March 4, 2021): 130–32. http://dx.doi.org/10.22201/enac.25942670e.2020.2.93.

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Reseña editorialTragedia griega: un estudio literario [Greek Tragedy: A Literary Study, 3rd edition], H. D. F. Kitto, tr. Miguel Bustos García, Centro Universitario de Estudios Cinematográficos : UNAM, México, 2018; 432 páginas. ISBN 978-607-30-1225-6

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Lyra, Joana, Rita Valente, Marta Rosário, and Mariana Guimarães. "Errata ao artigo “Parto por Cesariana em Grávida com COVID-19: O Primeiro Caso Descrito em Portugal”, publicado em Acta Med Port 2020 Jun;33(6):429-431." Acta Médica Portuguesa 33, no. 6 (June 1, 2020): 449. http://dx.doi.org/10.20344/amp.14039.

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Article published with errors:https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/13883On page 430, section “Discussion”, line 5, where it reads: (...) given the conflicting data about pre and postnatal transmission,6,7 a multi-disciplinary team consensus comprising obstetricians, neonatologists and infectious diseases specialists at our institution decided on mother-neonate separation immediately after birth until both were tested negative for SARS-CoV-2.4It should read: (...) given the conflicting data about pre and postnatal transmission,6,7 after thoughtful discussion between a multidisciplinary team and the mother, and respecting her expressed will, a shared decision was made of mother infant separation immediately after birth until both were tested negative for SARS-CoV-2.4 Artigo publicado com erros:https://www.actamedicaportuguesa.com/revista/index.php/amp/article/view/13883Na página 430, secção “Discussão”, linha 6, onde se lê: (...) given the conflicting data about pre and postnatal transmission,6,7 a multi-disciplinary team consensus comprising obstetricians, neonatologists and infectious diseases specialists at our institution decided on mother-neonate separation immediately after birth until both were tested negative for SARS-CoV-2.4Deverá ler-se: (...) given the conflicting data about pre and postnatal transmission,6,7 after thoughtful discussion between a multidisciplinary team and the mother, and respecting her expressed will, a shared decision was made of mother infant separation immediately after birth until both were tested negative for SARS-CoV-2.4

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Waisberg, Idel, Jason Dexter, Pierre Olivier-Petrucci, Guillaume Dubus, and Karine Perraut. "Collimated radiation in SS 433." Astronomy & Astrophysics 624 (April 2019): A127. http://dx.doi.org/10.1051/0004-6361/201834747.

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Context. The microquasar SS 433 is well known for its precessing, relativistic, and highly collimated baryonic jets, which manifest in its optical spectrum as pairs of hydrogen and helium emission lines moving with large Doppler shifts. Depending on their heating mechanism, the optical jet bullets may serve as a probe of the collimated radiation coming from the inner region close to the compact object, and which is not directly visible to observers on Earth. Aims. We aim to better understand the baryonic jet phenomenon in SS 433, in particular the properties of the optical bullets and their interaction with the ionizing collimated radiation. Methods. The optical interferometer VLTI/GRAVITY has allowed us to spatially resolve the optical jets in SS 433 for the first time. We present here the second such observation taken over three nights in July 2017. In addition, we used the X-shooter spectrograph at VLT to study the optical bullets in SS 433 in detail. Over the full wavelength range 0.3−2.5 μm, we identified up to twenty pairs of jet lines observed simultaneously, which we modeled with the spectral synthesis code Cloudy. Results. GRAVITY reveals elongated exponential-like radial spatial profiles for the optical jets on scales ≲1−10 mas, suggestive of a heating mechanism acting throughout a long portion of the jet and naturally explained by photoionization by the collimated radiation. We also spatially resolve the movement of the optical bullets for the first time, detecting more extended jet components corresponding to previous ejections. Cloudy photoionization models can explain the spatial intensity profiles measured with GRAVITY and the emission line ratios from X-shooter, and constrain the properties of the optical bullets and the ionizing radiation. We find that the latter must peak in the UV with an isotropic luminosity (as inferred by a face-on observer) ∼1041 erg s−1. Provided that the X-ray spectral energy distribution is sufficiently hard, the collimated X-ray luminosity could still be high enough so that the face-on observer would see SS 433 as ultraluminous X-ray source and it would still be compatible with the H/He/He+ ionization balance of the optical bullets. The kinetic power in the optical jets is constrained to 2−20 × 1038 erg s−1, and the extinction in the optical jets to AV = 6.7 ± 0.1. We suggest there may be substantial AV ≳ 1 and structured circumstellar extinction in SS 433, likely arising from dust formed in equatorial outflows.

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Mirzaei, Verrelst, Marofi, Abbasi, and Azadi. "Eco-Friendly Estimation of Heavy Metal Contents in Grapevine Foliage Using In-Field Hyperspectral Data and Multivariate Analysis." Remote Sensing 11, no. 23 (November 20, 2019): 2731. http://dx.doi.org/10.3390/rs11232731.

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Heavy metal monitoring in food-producing ecosystems can play an important role in human health safety. Since they are able to interfere with plants’ physiochemical characteristics, which influence the optical properties of leaves, they can be measured by in-field spectroscopy. In this study, the predictive power of spectroscopic data is examined. Five treatments of heavy metal stress (Cu, Zn, Pb, Cr, and Cd) were applied to grapevine seedlings and hyperspectral data (350–2500 nm), and heavy metal contents were collected based on in-field and laboratory experiments. The partial least squares (PLS) method was used as a feature selection technique, and multiple linear regressions (MLR) and support vector machine (SVM) regression methods were applied for modelling purposes. Based on the PLS results, the wavelengths in the vicinity of 2431, 809, 489, and 616 nm; 2032, 883, 665, 564, 688, and 437 nm; 1865, 728, 692, 683, and 356 nm; 863, 2044, 415, 652, 713, and 1036 nm; and 1373, 631, 744, and 438 nm were found most sensitive for the estimation of Cu, Zn, Pb, Cr, and Cd contents in the grapevine leaves, respectively. Therefore, visible and red-edge regions were found most suitable for estimating heavy metal contents in the present study. Heavy metals played a significant role in reforming the spectral pattern of stressed grapevine compared to healthy samples, meaning that in the best structures of the SVM regression models, the concentrations of Cu, Zn, Pb, Cr, and Cd were estimated with R2 rates of 0.56, 0.85, 0.71, 0.80, and 0.86 in the testing set, respectively. The results confirm the efficiency of in-field spectroscopy in estimating heavy metals content in grapevine foliage.

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Matyasek, R., J. Fulnecek, K. Y. Lim, A. R. Leitch, and A. Kovarik. "Evolution of 5S rDNA unit arrays in the plant genus Nicotiana (Solanaceae)." Genome 45, no. 3 (June 1, 2002): 556–62. http://dx.doi.org/10.1139/g02-017.

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Nicotiana tabacum (tobacco, Solanaceae) has two 5S ribosomal DNA (rDNA) families, one of unit length ~646 bp and the other ~430 bp, that differ in the length of the 5S rDNA non-transcribed spacer (NTS). The long 5S rDNA family, found on the T genome of tobacco and in Nicotiana tomentosiformis, contains a GC-rich subregion that is absent in the short family. We designed primers for this subregion and generated a probe that we used against a range of Nicotiana and related Solanaceous species. We demonstrated the presence of the GC-rich subregion in a range of Nicotiana species, but it was absent in Nicotiana sylvestris, Nicotiana longiflora, and two closely related genera, Petunia and Solanum. These data suggest that this subregion of the NTS is likely to have evolved with the genus Nicotiana. The absence of the subregion in N. sylvestris and N. longiflora is likely to have arisen by a deletion event in the evolution of section alatae. We demonstrate patterns of evolution in the 5S rDNA unit cluster in relation to a phylogenetic reconstruction of species relationships in section tomentosae. Nicotiana glutinosa diverged early from the section and contains a 5S rDNA family based on a 550-bp unit. After this divergence, 430- and 650-bp rDNA unit families evolved. The 650-bp family is found in all species of tomentosae (except N. glutinosa) and in tobacco. The 430-bp family within tomentosae includes the GC-rich subregion and is thus unrelated to the 430-bp family in N. sylvestris. Nicotiana setchellii is unusual in that it has three 5S rDNA loci, including one locus that is exceptionally large. This species, unique to tomentosae, has a very abundant 900-bp unit family. It is possible that this 900-bp family occurs on this one large locus. In N. tomentosa and N. kawakamii, the 650-bp family is predominant, whereas N. tomentosiformis and N. otophora have only the 650-bp family. There is no clear relationship between the number of 5S families and the number of 5S rDNA loci. Certainly the replacement of 5S rDNA units, perhaps by gene conversion, has occurred repeatedly in the evolution of genus Nicotiana.Key words: 5S rDNA, evolution, Nicotiana, Solanaceae, satellite homogenization.

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Slavinskaya, Galina V., and Olga V. Kurenkova. "О полифункциональности высокоосновных анионитов." Сорбционные и хроматографические процессы 19, no. 1 (February 6, 2019): 101–10. http://dx.doi.org/10.17308/sorpchrom.2019.19/655.

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Abstract:

Методом потенциометрического титрования в высокоосновном анионите АВ-17-8 установлено наличие трех типов функциональных групп. Определены константы их ионизации: pKb1=1.72÷1.78; pKb2=4.32÷4.38; pKb3=7.72÷7.82. В ионный обмен с кремниевыми кислотами вступают две функциональные группы с меньшими величинами pKb. Доля слабоосновных групп (с pKb3=7.72÷7.82) в разных партиях анионита достигает 12-34 % от полной обменной емкости. Полифункциональность анионита АВ-17-8 нужно учитывать при обсуждении различных закономерностей ионообменных процессов, а также при прогнозировании сорбции анионов слабых органических и минеральных кислот.

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