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Artículos de revistas sobre el tema "COMET-22"

Autor: Grafiati
Publicado: 5 de junio de 2025
Última modificación: 2 de agosto de 2025

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1

Aravind, K., Shashikiran Ganesh, Kumar Venkataramani, et al. "Activity of the first interstellar comet 2I/Borisov around perihelion: results from Indian observatories." Monthly Notices of the Royal Astronomical Society 502, no. 3 (2021): 3491–99. http://dx.doi.org/10.1093/mnras/stab084.

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ABSTRACT Comet 2I/Borisov is the first true interstellar comet discovered. Here, we present results from observational programs at two Indian observatories, 2 m Himalayan Chandra Telescope at the Indian Astronomical Observatory, Hanle (HCT) and 1.2 m telescope at the Mount Abu Infrared Observatory (MIRO). Two epochs of imaging and spectroscopy were carried out at the HCT and three epochs of imaging at MIRO. We found CN to be the dominant molecular emission on both epochs, 2019 November 30 and December 22, at distances of rH = 2.013 and 2.031 au, respectively. The comet was inferred to be relat
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2

Shinnaka, Yoshiharu, Hideyo Kawakita, Hitomi Kobayashi, Reiko Furusho, and Jun-ichi Watanabe. "Optical Imaging Polarimetry of Comet 21P/Giacobini–Zinner during Its 2018 Apparition." Planetary Science Journal 4, no. 7 (2023): 125. http://dx.doi.org/10.3847/psj/acdf49.

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Abstract We conducted polarimetric observations of comet 21P/Giacobini–Zinner in the optical wavelength region using the polarimetric imager PICO equipped with the 50 cm telescope for Public Outreach at the Mitaka Campus of the National Astronomical Observatory of Japan on UT 2018 September 16, at a solar phase angle of 77° for the comet. We used Gunn’s i′-band filter to cover the wavelength region where sunlight reflected by dust grains dominates cometary spectra. The intensity map of comet 21P/Giacobini–Zinner showed an elongated coma structure along the east–west direction. The linear polar
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3

Miller, F. D. "Properties of a compact side-ray system - Comet 1957V, 22 August 1957." Astronomical Journal 95 (February 1988): 553. http://dx.doi.org/10.1086/114655.

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4

de Pater, Imke, J. R. Forster, Melvyn Wright, et al. "BIMA and VLA Observations of Comet Hale-Bopp at 22–115 GHz." Astronomical Journal 116, no. 2 (1998): 987–96. http://dx.doi.org/10.1086/300470.

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5

Matlovič, Pavol, Leonard Kornoš, Martina Kováčová, Juraj Tóth, and Javier Licandro. "Characterization of the June epsilon Ophiuchids meteoroid stream and the comet 300P/Catalina." Astronomy & Astrophysics 636 (April 2020): A122. http://dx.doi.org/10.1051/0004-6361/202037727.

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Aims. Prior to 2019, the June epsilon Ophiuchids (JEO) were known as a minor unconfirmed meteor shower with activity that was considered typically moderate for bright fireballs. An unexpected bout of enhanced activity was observed in June 2019, which even raised the possibility that it was linked to the impact of the small asteroid 2019 MO near Puerto Rico. Early reports also point out the similarity of the shower to the orbit of the comet 300P/Catalina. We aim to analyze the orbits, emission spectra, and material strengths of JEO meteoroids to provide a characterization of this stream, identi
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6

Oldroyd, William J., Colin Orion Chandler, Chadwick A. Trujillo, et al. "Comet-like Activity Discovered on Quasi-Hilda Asteroid 2009 DQ118." Research Notes of the AAS 7, no. 3 (2023): 42. http://dx.doi.org/10.3847/2515-5172/acc17c.

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Abstract We report evidence of comet-like activity on asteroid 2009 DQ118, a quasi-Hilda object near the 3:2 interior mean-motion resonance with Jupiter. This discovery was made by volunteers as part of the Active Asteroids Citizen Science project, a NASA Partner hosted on the Zooniverse platform. Follow-up archival searches yielded over 20 images of 2009 DQ118 exhibiting a comet-like tail on UT 2016 March 8 and 9 acquired with the Dark Energy Camera on the Blanco 4 m telescope at the Cerro Tololo Inter-American Observatory, Chile. These images were taken when 2009 DQ118 was near its 2016 peri
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7

Geem, Jooyeon, Masateru Ishiguro, Yoonsoo P. Bach, et al. "A polarimetric study of asteroids in comet-like orbits." Astronomy & Astrophysics 658 (February 2022): A158. http://dx.doi.org/10.1051/0004-6361/202142014.

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Context. Asteroids in comet-like orbits (ACOs) consist of asteroids and dormant comets. Due to their similar appearance, it is challenging to distinguish dormant comets from ACOs via general telescopic observations. Surveys for discriminating dormant comets from the ACO population have been conducted via spectroscopy or optical and mid-infrared photometry. However, they have not been conducted through polarimetry. Aims. We conducted the first polarimetric research of ACOs. Methods. We conducted a linear polarimetric pilot survey for three ACOs: (944) Hidalgo, (3552) Don Quixote, and (331471) 1
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8

Han, K. C., W. C. Wong, and Iris F. F. Benzie. "Genoprotective effects of green tea (Camellia sinensis) in human subjects: results of a controlled supplementation trial." British Journal of Nutrition 105, no. 2 (2010): 171–79. http://dx.doi.org/10.1017/s0007114510003211.

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Green tea is rich in polyphenolic antioxidants and has widely reported but largely unsubstantiated health benefits. In the present study, genoprotective effects of two types of green tea were studied both in an in vitro and in a human supplementation trial. For the in vitro study, human lymphocytes were pre-incubated in tea (0·005–0·1 %, w/v), washed and subjected to oxidant challenge induced by H2O2. In a placebo-controlled, cross-over supplementation study, eighteen healthy volunteers took 2 × 150 ml/d of 1 % (w/v) green tea (‘Longjing’ green tea or ‘screw-shaped’ green tea) or water (contro
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9

Iwamoto, Naoko, Miyako Nara, Shin-ichiro Horiguchi, and Tomoyuki Aruga. "Surgical upstaging rates in patients meeting the eligibility for active surveillance trials." Japanese Journal of Clinical Oncology 51, no. 8 (2021): 1219–24. http://dx.doi.org/10.1093/jjco/hyab082.

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Abstract Purpose Four clinical active surveillance trials including LORIS, COMET, LORD and LORETTA, are being conducted to assess whether women with low-risk ductal carcinoma in situ can safely avoid surgery. The present study aimed to determine the rate of upstaging to invasive cancer among patients with a preoperative diagnosis of ductal carcinoma in situ and to evaluate the incidence of upstaging in patients meeting the eligibility criteria for four active surveillance clinical trials. Methods The present study initially enrolled 180 patients with 183 calcifications who received the diagnos
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10

Maha Tareq Hussein, Abdulsahib Kadhim Ali, and Amel Jabbar Mutta. "HPRT gene mutation, sister chromatid exchange and comet assay in peripheral lymphocytes of radiation laborers at Al-Amal Cancer Hospital in Baghdad." International Journal of Biological and Pharmaceutical Sciences Archive 3, no. 1 (2022): 001–7. http://dx.doi.org/10.53771/ijbpsa.2022.3.1.0102.

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A Study performed on 30 Iraqi radiation Labors had been exposed tо a low dose tо ionizing radiation at Al-Amal Cancer Hospital in Baghdad the use of three genetic endpoints. Covered 12 females and 18 males between the aged tо (22-57) years. In addition to 20 Healthy individuals from the population, dwelling Baghdad, covered, 7 females and 13 males, aged (19 - 55) years which are non-smokers, non- alcoholic. The cytogenetic analysis, including, HPRT gene mutation¸ comet assay and SCE have been carried out on peripheral blood lymphocytes of labors and control groups. The HPRT gene mutation assay
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11

Oldroyd, William J., Colin Orion Chandler, Chadwick A. Trujillo, et al. "Recurring Activity Discovered on Quasi-Hilda 2009 DQ118." Astrophysical Journal Letters 957, no. 1 (2023): L1. http://dx.doi.org/10.3847/2041-8213/acfcbc.

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Abstract We have discovered two epochs of activity on quasi-Hilda 2009 DQ118. Small bodies that display comet-like activity, such as active asteroids and active quasi-Hildas, are important for understanding the distribution of water and other volatiles throughout the solar system. Through our NASA Partner Citizen Science project, Active Asteroids, volunteers classified archival images of 2009 DQ118 as displaying comet-like activity. By performing an in-depth archival image search, we found over 20 images from UT 2016 March 8–9 with clear signs of a comet-like tail. We then carried out follow-u
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12

Cosmovici, Cristiano B., Stelio Montebugnoli, Alessandro Orfei, Sergej Pogrebenko, and Stefano Cortiglioni. "The puzzling detection of the 22 GHz water emission line in Comet Hyakutake at perihelion." Planetary and Space Science 46, no. 4 (1998): 467–70. http://dx.doi.org/10.1016/s0032-0633(97)00230-4.

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13

Oldani, Virginio, Federico Manzini, Paolo Ochner, et al. "Comet 19/P Borrelly in 2021–22: Change in the spin axis orientation versus previous apparitions." Icarus 395 (May 2023): 115451. http://dx.doi.org/10.1016/j.icarus.2023.115451.

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14

Mitkovska, Vesela, Spas Dzhoglov, Doychin Boyadzhiev, et al. "SPERMATOZOA DNA DAMAGE IN MEN WITH REPRODUCTIVE PROBLEMS." Journal of IMAB - Annual Proceeding (Scientific Papers) 28, no. 3 (2022): 4511–16. http://dx.doi.org/10.5272/jimab.2022283.4511.

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Male infertility is a serious emerging problem of public health, with high social significance due to its direct connection to negative demographic trends in Bulgaria and in different regions of the world. The targeted and multifaceted studies in this field are contradictory and incomplete. Purpose: The present study analyzes the degree of spermatozoa DNA damages in men with reproductive problems. The aim of the study was to investigate the spermatozoa DNA damage in men with reproductive problems by complex approach combining comet assay and conventional sperm analysis. Material and methods: T
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15

Hsieh, Henry H., John W. Noonan, Michael S. P. Kelley, et al. "The Volatile Composition and Activity Evolution of Main-belt Comet 358P/PANSTARRS." Planetary Science Journal 6, no. 1 (2025): 3. https://doi.org/10.3847/psj/ad9199.

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Abstract We report the detection of water vapor associated with main-belt comet 358P/PANSTARRS on UT 2024 January 8–9 using the NIRSPEC instrument on board JWST. We derive a water production rate of Q H 2 O = ( 5.0 ± 0.2 ) × 10 25 molecules s−1, marking only the second direct detection of sublimation products of any kind from a main-belt comet, after 238P/Read. Similar to 238P, we find a remarkable absence of hypervolatile species, finding Q CO 2 < 7.6 × 10 22 molecules s−1, corresponding to Q CO 2 / Q H 2 O < 0.2 %. Upper limits on CH3OH and CO emission are also estimated. Photometry fr
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16

Ahmadova, S. "A COMPARATIVE QUALITY ASSESSMENT OF CHATGPT MODELS AND HUMAN TRANSLATION OF SCIENTIFIC TEXTS." Slovak international scientific journal, no. 83 (May 14, 2024): 90–94. https://doi.org/10.5281/zenodo.11189071.

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This paper aims to examine and compare translations of scientific texts from English to Russian performed by ChatGPT-3.5, ChatGPT-4, and human translators. The study conducts a comparative quality analysis of these translations and utilizes the neural-based machine translation evaluation metrics COMET-22 and BLEURT-20. A key aspect of this paper is to identify errors, shedding the light on the strengths and limitations of both the deep learning based language models in order to better estimate their performance in comparison to human translation. Using a mixed-method research approach, this st
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17

Hourcade, J. D., M. Perez-Crespo, B. Pintado, and A. Gutiérrez-Adán. "3 SELECTION OF UNFRAGMENTED-DNA SPERMATOZOA FROM HEAT STRESSED MICE BY FEMALE UTERINE TRACT AND ZONA PELUCIDA BINDING." Reproduction, Fertility and Development 21, no. 1 (2009): 102. http://dx.doi.org/10.1071/rdv21n1ab3.

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Physiological bases of the sperm selection processes within the female reproductive tract before they meet and fertilize the oocyte are unknown. The aim of this work was to determine if one of the keys of spermatozoa selection could be DNA integrity. It has been reported that sperm DNA damage does not impair in vitro fertilization (IVF). However, it has been suggested that the zona pelucida (ZP) is able to select spermatozoa with unfragmented DNA (Liu and Baker 2007 Hum. Reprod. 22, 1597–1602). In this work, DNA damage of spermatozoa was artificially induced by scrotal heat treatment (HT) (42°
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18

Li, Zhenhong, Tim Wright, Andrew Hooper, et al. "TOWARDS INSAR EVERYWHERE, ALL THE TIME, WITH SENTINEL-1." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 14, 2016): 763–66. http://dx.doi.org/10.5194/isprs-archives-xli-b4-763-2016.

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Sentinel-1A was launched in April 2014, and has been collecting data routinely over more than one year. Sentinel-1B is set for launch on 22 April 2016. The Sentinel-1 constellation has several advantages over previous radar missions for InSAR applications: (1) Data are being acquired systematically for tectonic and volcanic areas, (2) Images cover a wide footprint, 250 km from near to far range in Interferometric Wide Swath (TOPS) mode, (3) Small perpendicular and temporal baselines greatly improve interferometric coherence at C-band, (4) Data are freely available to all users, (5) The mission
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19

BORISENKO, M. N., V. V. VASEKHA, and V. A. MATVEEV. "WINTER HARDINESS OF THE PROSPECTIVE HYBRIDS OF THE CULTIVATED CHERRY PLUM." Fruit-Growing 33 (August 16, 2021): 75–82. http://dx.doi.org/10.47612/0134-9759-2021-33-75-82.

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One of the chief limiting factors for the cultivated cherry plum in the central zone of Belarus is winter hardiness. The
 main components of cherry plum winter hardiness were studied by the method of artificial freezing. The main test modes
 were: resistance to autumn slight frosts and early frosts; the maximum value of frost resistance developed by plants after
 the end of organic dormancy; the ability to maintain resistance to low temperatures during the winter thaws, to restore frost
 resistance during re-hardening after thaws.
 In the field, as well as in artificia
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20

Li, Zhenhong, Tim Wright, Andrew Hooper, et al. "TOWARDS INSAR EVERYWHERE, ALL THE TIME, WITH SENTINEL-1." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 14, 2016): 763–66. http://dx.doi.org/10.5194/isprsarchives-xli-b4-763-2016.

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Sentinel-1A was launched in April 2014, and has been collecting data routinely over more than one year. Sentinel-1B is set for launch on 22 April 2016. The Sentinel-1 constellation has several advantages over previous radar missions for InSAR applications: (1) Data are being acquired systematically for tectonic and volcanic areas, (2) Images cover a wide footprint, 250 km from near to far range in Interferometric Wide Swath (TOPS) mode, (3) Small perpendicular and temporal baselines greatly improve interferometric coherence at C-band, (4) Data are freely available to all users, (5) The mission
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21

Miller, Freeman D. "Erratum: Properties of a Compact Side-Ray System: Comet 1957V, 22 August 1957 [Astron. J. 95, 553 (1988)]." Astronomical Journal 95 (June 1988): 1908. http://dx.doi.org/10.1086/114785.

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22

Voelzke, M. R., and O. T. Matsuura. "The onsets of disconnection events of comet P/Halley on 1985 December 13-14 and 1986 February 22." Astronomy and Astrophysics Supplement Series 146, no. 1 (2000): 1–5. http://dx.doi.org/10.1051/aas:2000259.

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23

Jones, A. R., D. C. Sanders, and R. J. Dufault. "EARLY TEMPERATURES INFLUENCE BROCCOLI GROWTH AND HEAD QUALITY." HortScience 25, no. 8 (1990): 865C—865. http://dx.doi.org/10.21273/hortsci.25.8.865.

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Three broccoli (Brassica oleracea L. Italica group) cultivars (Baccus, Packman, and Southern Comet) were grown for 14, 24, or 34 days at 22/18C (day/night) in a greenhouse. Then plants were moved to growth chambers where temperatures were maintained at 26/22, 30/26, or 34/30C and were grown for 1, 2, or 3 weeks before returning them to the greenhouse. A1 varieties when exposed to high temperatures developed smaller heads Packman when exposed to high temperatures resulted in a reduction in uniformity. Other cultivars were not effected. Lack of openness, an important marketable characteristic wa
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24

Jones, A. R., D. C. Sanders, and R. J. Dufault. "EARLY TEMPERATURES INFLUENCE BROCCOLI GROWTH AND HEAD QUALITY." HortScience 25, no. 8 (1990): 865c—865. http://dx.doi.org/10.21273/hortsci.25.8.865c.

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Three broccoli (Brassica oleracea L. Italica group) cultivars (Baccus, Packman, and Southern Comet) were grown for 14, 24, or 34 days at 22/18C (day/night) in a greenhouse. Then plants were moved to growth chambers where temperatures were maintained at 26/22, 30/26, or 34/30C and were grown for 1, 2, or 3 weeks before returning them to the greenhouse. A1 varieties when exposed to high temperatures developed smaller heads Packman when exposed to high temperatures resulted in a reduction in uniformity. Other cultivars were not effected. Lack of openness, an important marketable characteristic wa
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25

Feng, Fei, Fei Chen, and Bin Ma. "Color doppler sonogram showing hyperechoic dots with comet-tail signs along the vascular structure at 22 weeks of gestation." ASVIDE 11 (October 2024): 271. http://dx.doi.org/10.21037/asvide.2024.271.

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26

Voronin, Mikhail V., Ilya A. Kadnikov, Liana F. Zainullina, et al. "Neuroprotective Properties of Quinone Reductase 2 Inhibitor M-11, a 2-Mercaptobenzimidazole Derivative." International Journal of Molecular Sciences 22, no. 23 (2021): 13061. http://dx.doi.org/10.3390/ijms222313061.

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The ability of NQO2 to increase the production of free radicals under enhanced generation of quinone derivatives of catecholamines is considered to be a component of neurodegenerative disease pathogenesis. The present study aimed to investigate the neuroprotective mechanisms of original NQO2 inhibitor M-11 (2-[2-(3-oxomorpholin-4-il)-ethylthio]-5-ethoxybenzimidazole hydrochloride) in a cellular damage model using NQO2 endogenous substrate adrenochrome (125 µM) and co-substrate BNAH (100 µM). The effects of M-11 (10–100 µM) on the reactive oxygen species (ROS) generation, apoptosis and lesion o
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27

Nelson, Robert M. "The Deep Space 1 Encounter with Comet 19P/Borrelly." Highlights of Astronomy 13 (2005): 725. http://dx.doi.org/10.1017/s1539299600016932.

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On 22 Sept 2001 at 22h 29m 33s UTC the Deep Space 1 (DS1) spacecraft encountered the comet 19P/Borrelly at a distance of 2171 km. Measurements were undertaken by two dedicated science instruments on the spacecraft and by the spacecraft’s ion propulsion system diagnostic sensors (IDS). The images are the highest resolution ever obtained of a cometary nucleus and show topography and albedo differences on the surface at a resolution of 47m. The disk averaged geometric albedo is less than 0.03, among the lowest of any solar system object observed. The surface reflectance varies by a factor of thre
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28

Groussin, O., P. L. Lamy, M. S. P. Kelley, et al. "Spitzer Space Telescope observations of bilobate comet 8P/Tuttle." Astronomy & Astrophysics 632 (December 2019): A104. http://dx.doi.org/10.1051/0004-6361/201936458.

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Context. Comet 8P/Tuttle is a nearly isotropic comet whose physical properties are poorly known and might be different from those of ecliptic comets owing to their different origin. Two independent observations have shown that 8P/Tuttle has a bilobate nucleus. Aims. Our goal is to determine the physical properties of the nucleus (size, shape, thermal inertia, and albedo) and coma (water and dust) of 8P/Tuttle. Methods. We observed the inner coma of 8P/Tuttle with the infrared spectrograph and the infrared camera of the Spitzer Space Telescope. We obtained one spectrum (5–40 μm) on 2 November 2
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29

Leblanc, Y., and G. A. Dulk. "Changes in brightness of Jupiter's radiation belts at 13 and 22 cm during and after impacts of comet SL‐9." Geophysical Research Letters 22, no. 13 (1995): 1793–96. http://dx.doi.org/10.1029/95gl01193.

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30

Bromley, S. J., B. Neff, S. D. Loch, et al. "Atomic Iron and Nickel in the Coma of C/1996 B2 (Hyakutake): Production Rates, Emission Mechanisms, and Possible Parents." Planetary Science Journal 2, no. 6 (2021): 228. http://dx.doi.org/10.3847/psj/ac2dff.

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Abstract Two papers recently reported the detection of gaseous nickel and iron in the comae of over 20 comets from observations collected over two decades, including interstellar comet 2I/Borisov. To evaluate the state of the laboratory data in support of these identifications, we reanalyzed archived spectra of comet C/1996 B2 (Hyakutake), one of the nearest and brightest comets of the past century, using a combined experimental and computational approach. We developed a new, many-level fluorescence model that indicates that the fluorescence emissions of Fe I and Ni I vary greatly with helioce
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31

FAULLIMEL, CEDRIC, SAÏD ENNAHAR, DALAL AOUDE-WERNER, PATRICK GUTERL, and ERIC MARCHIONI. "DNA Comet Assay for the Detection of Time-Temperature Abuse during the Storage of Poultry." Journal of Food Protection 68, no. 7 (2005): 1414–20. http://dx.doi.org/10.4315/0362-028x-68.7.1414.

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Effects of abusive storage conditions on the quality of fresh chicken were studied by detecting DNA damage to breast fillets and liver with the neutral comet assay. Chilled samples were kept at 4°C for prolonged periods, whereas frozen samples were exposed to temperatures of 4°C, representing inadvertent thawing, and 20°C, representing extreme abuse in the distribution chain. Comets' mean tail moment distributions reflected the increasing patterns of DNA damage, but the differences of values between close levels of treatment were sometimes insignificant. The design of the DNA damage index, int
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32

Gargon, Elizabeth, Sarah L. Gorst, Karen Matvienko-Sikar, and Paula R. Williamson. "Choosing important health outcomes for comparative effectiveness research: 6th annual update to a systematic review of core outcome sets for research." PLOS ONE 16, no. 1 (2021): e0244878. http://dx.doi.org/10.1371/journal.pone.0244878.

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Background An annual update to a systematic review of core outcome sets (COS) for research ensures that the COMET database is up-to-date. The aims of this study were to: (i) identify COS that were published or indexed in 2019 and to describe the methodological approaches used in these studies; (ii) investigate whether children have been included as participants in published COS development studies, and which methods have been used to facilitate their participation; iii) update a previous exercise to identify COS relevant to the most burdensome global diseases and injuries. Methods MEDLINE and
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33

Rivest, François, Victor de Gautard, Vytautas Navikas, et al. "Abstract 4616: Automated multiplex immunofluorescence enables single cell analysis of tumor stroma." Cancer Research 83, no. 7_Supplement (2023): 4616. http://dx.doi.org/10.1158/1538-7445.am2023-4616.

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Abstract Background: The tumor microenvironment (TME) consists of malignant cells and supporting non-malignant cellular and non-cellular components that form the tumor stroma. The tumor stroma plays an important role in tumor progression and has emerged as a modulator of anti-tumor immunity (Salmon et al., Nat Rev Cancer 2019) and responses to therapy (Hirata and Sahai, Cold Spring Harb Perspect Med 2017). As such, several therapeutic approaches have recently been developed to target stromal cells as anti-cancer treatments (Valkenburg et al., Nat Rev Clin Oncol 2018, Bejarano et al., Cancer Di
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34

Tao, Yi, Zhimin Gu, Ye Yang, et al. "High Trip13 and Low P31 Comet Cause Drug Resistance and Poor Prognosis In Multiple Myeloma." Blood 122, no. 21 (2013): 3820. http://dx.doi.org/10.1182/blood.v122.21.3820.3820.

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Abstract Background We have recently established that increased chromosomal instability (CIN) signature is linked to drug resistance and poor outcome in multiple myeloma (MM) and other cancers. Thyroid Hormone Receptor Interactor 13 (Trip13), one of the 56 drug-resistant genes, plays a key role in chromosomal recombination and structure development during meiosis and has been reported to be increased in some malignancies including lung cancer, prostate cancer and breast cancer. In this study, we investigated how important Trip13 is in myelomagenesis and progression. Materials and Methods Gene
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35

Cambianica, P., M. Fulle, G. Cremonese, et al. "Time evolution of dust deposits in the Hapi region of comet 67P/Churyumov-Gerasimenko." Astronomy & Astrophysics 636 (April 2020): A91. http://dx.doi.org/10.1051/0004-6361/202037485.

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Aims. We provide a measurement of the seasonal evolution of the dust deposit erosion and accretion in the Hapi region of comet 67P/Churyumov-Gerasimenko with a vertical accuracy of 0.2–0.9 m. Methods. We used OSIRIS Narrow Angle Camera images with a spatial scale of lower than 1.30 m px−1 and developed a tool to monitor the time evolution of 22 boulder heights with respect to the surrounding dust deposit. The tool is based on the measurement of the shadow length projected by the boulder on the surrounding pebble deposit. Assuming the position of the boulders does not change during the observat
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36

Djuari, M. A., L. Elenschneider, M. Engelke, J. Höfert, and C. Ziemann. "P03-22: Sensitivity of primary human hepatocytes and HepG2 cells for genotoxicity testing of N-nitrosamines in the alkaline comet assay." Toxicology Letters 384 (September 2023): S91—S92. http://dx.doi.org/10.1016/s0378-4274(23)00486-1.

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37

Hsieh, Henry H., Colin O. Chandler, Larry Denneau, et al. "Physical Characterization of Main-belt Comet (248370) 2005 QN173." Astrophysical Journal Letters 922, no. 1 (2021): L9. http://dx.doi.org/10.3847/2041-8213/ac2c62.

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Abstract We report results from new and archival observations of the newly discovered active asteroid (248370) 2005 QN173 (also now designated Comet 433P), which has been determined to be a likely main-belt comet based on a subsequent discovery that it is recurrently active near perihelion. From archival data analysis, we estimate g ′ -, r ′ -, i ′ -, and z ′ -band absolute magnitudes for the nucleus of H g = 16.62 ± 0.13, H r = 16.12 ± 0.10, H i = 16.05 ± 0.11, and H z = 15.93 ± 0.08, corresponding to nucleus colors of g ′ − r ′ = 0.50 ± 0.16 , r ′ − i ′ = 0.07 ± 0.15 , and i ′ − z ′ = 0.12 ±
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38

Levasseur-Regourd, A. C. "Space Exploration of Comets and the Evolution of Amateur-Professional Cooperation." International Astronomical Union Colloquium 98 (1988): 150–51. http://dx.doi.org/10.1017/s0252921100092587.

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In 1985–86 when spaceprobes flew past P/Giacobini-Zinner and P/Halley, many amateurs observed these comets and submitted their results to national or international (IHW) organisations. Their visual, photographic, photometric and spectroscopic observations made a contribution to scientific knowledge. It is pertinent to ask if space programmes under consideration will allow similar cooperation to be continued.The least uncertain project is that of another cometary fly-past by GIOTTO. Following orbital corrections made between 1986 March 19 and April 2, (ΔV =115 ms−1), the European probe should p
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39

Bryce, Casey C., Gerda Horneck, Elke Rabbow, Howell G. M. Edwards, and Charles S. Cockell. "Impact shocked rocks as protective habitats on an anoxic early Earth." International Journal of Astrobiology 14, no. 1 (2014): 115–22. http://dx.doi.org/10.1017/s1473550414000123.

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AbstractOn Earth, microorganisms living under intense ultraviolet (UV) radiation stress can adopt endolithic lifestyles, growing within cracks and pore spaces in rocks. Intense UV irradiation encountered by microbes leads to death and significant damage to biomolecules, which also severely diminishes the likelihood of detecting signatures of life. Here we show that porous rocks shocked by asteroid or comet impacts provide protection for phototrophs and their biomolecules during 22 months of UV radiation exposure outside the International Space Station. The UV spectrum used approximated the hig
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40

Zhang, Shu-Han, Yun Wang, Jing Yang, et al. "Comparative Analysis of Aristolochic Acids in Aristolochia Medicinal Herbs and Evaluation of Their Toxicities." Toxins 14, no. 12 (2022): 879. http://dx.doi.org/10.3390/toxins14120879.

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Aristolochic acids (AAs) are a group of nitrophenanthrene carboxylic acids present in many medicinal herbs of the Aristolochia genus that may cause irreversible hepatotoxicity, nephrotoxicity, genotoxicity and carcinogenicity. However, the specific profile of AAs and their toxicity in Aristolochia plants, except for AAs Ι and ΙΙ, still remain unclear. In this study, a total of 52 batches of three medicinal herbs belonging to the Aristolochia family were analyzed for their AA composition profiles and AA contents using the UPLC-QTOF-MS/MS approach. The studied herbs were A. mollissima Hance (AMH
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41

Takahashi, M., M. Sakatani, S. Kobayashi, S. Kobayashi, and H. Nagashima. "145 STAGE-SPECIFIC EFFECT OF OXIDATIVE STRESS ON DEVELOPMENTAL COMPETENCE, ROS GENERATION AND DNA DAMAGE OF PORCINE PARTHENOGENETIC EMBRYOS." Reproduction, Fertility and Development 18, no. 2 (2006): 180. http://dx.doi.org/10.1071/rdv18n2ab145.

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We investigated the effect of oxidative stress on stage specific developmental ability, reactive oxygen species (ROS) generation and DNA damage of parthenogenetically activated porcine embryos. Cumulus-oocyte complexes (COCs) were aspirated from follicles on the surface of ovaries. The COCs were matured in NCSU-23 containing 10% (vol/vol) porcine follicular fluid and 10 IU/mL hCG during the first 22 h followed by an extra 22 h of culture in the hormone free NCSU-23. After 44 h of maturation, oocytes were denuded of cumulus cells and used for activation. Oocytes were activated by a 100-�sec pul
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42

Van Dongen, Hans, Bala Koritala, Kenneth Porter, et al. "0025 Circadian Dysregulation of Human DNA Repair Genes and Elevated DNA Damage in Simulated Night Shift Schedule." Sleep 45, Supplement_1 (2022): A11—A12. http://dx.doi.org/10.1093/sleep/zsac079.024.

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Abstract Introduction Circadian misalignment from night shift (NS) work is associated with increased risk of cancer. In a simulated NS study, we sought to investigate the potential role of circadian disruption of cancer hallmark pathway genes. Methods N=14 healthy adults (aged 22-34) participated in a laboratory study. Seven were assigned to a simulated day shift (DS) schedule involving 3 days of daytime wakefulness (06:00-22:00); the other seven were assigned to a simulated NS schedule involving 3 days of nighttime wakefulness (18:00-10:00). Subjects then underwent a 24-hour constant routine
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43

Van Dongen, H., B. Koritala, J. E. McDermott, et al. "0025 Circadian Dysregulation of DNA Repair and Increased Endogenous and Exogenous Sensitivity to DNA Damage Precipitate Elevated Cancer Risk Associated with Night Shift Work." Sleep 43, Supplement_1 (2020): A10. http://dx.doi.org/10.1093/sleep/zsaa056.024.

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Abstract Introduction The elevated cancer risk associated with night shift work is poorly understood. To investigate whether circadian disruption may play a role, we assessed the circadian transcriptome and its association with hallmark cancer pathways, as well as sensitivity to endogenous and exogenous sources of DNA damage, after in-laboratory simulated shift work. Methods N=14 healthy humans (aged 22-34y; 10m, 4f) were exposed to a simulated night shift schedule (daytime sleep: 10:00-18:00) or a simulated day shift schedule (nighttime sleep: 22:00-06:00) for 3 days (n=7 in each condition).
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44

Basch, Ethan M., Mark C. Scholz, Johann Sebastian De Bono, et al. "Final analysis of COMET-2: Cabozantinib (Cabo) versus mitoxantrone/prednisone (MP) in metastatic castration-resistant prostate cancer (mCRPC) patients (pts) with moderate to severe pain who were previously treated with docetaxel (D) and abiraterone (A) and/or enzalutamide (E)." Journal of Clinical Oncology 33, no. 7_suppl (2015): 141. http://dx.doi.org/10.1200/jco.2015.33.7_suppl.141.

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141 Background: Cabo inhibits tyrosine kinases including MET and VEGFRs. In a phase 2 study in mCRPC pts, Cabo was associated with improvements in pain, bone scans, measurable disease, and circulating tumor cells. COMET-2 compared the effects of Cabo versus MP on pain palliation in men with progressive mCRPC. Methods: In this double-blind, controlled phase 3 study (NCT01522443), pts with moderate to severe pain and disease progression following D, and A and/or E were randomized 1:1 to receive Cabo (60 mg qd) or MP (12 mg/m2 q3wk and 5 mg bid, resp). All pts were required to have a 7-day averag
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45

Jama, Adel, Dragana Mitic-Culafic, S. Kolarevic, Sinisa Djurasevic, and Jelena Knezevic-Vukcevic. "Protective effect of probiotic bacteria against cadmium-induced genotoxicity in rat hepatocytes in vivo and in vitro." Archives of Biological Sciences 64, no. 3 (2012): 1197–206. http://dx.doi.org/10.2298/abs1203197j.

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The protective effect of probiotic bacteria against cadmium (Cd)-induced genotoxicity was studied in rat hepatocytes in vivo and in vitro. Male Wistar rats, Rattus norvegicus, were treated for five weeks with (i) CdCl2 (70 ppm in the drinking water), (ii) a mixture of lyophilized probiotic bacteria Lactobacillus rhamnosus, L. acidophilus and Bifido-bacterium longum (5?108 cfu/g of food), or (iii) CdCl2 and probiotic bacteria. In addition, single cells obtained from the untreated rat liver were exposed to CdCl2 (70 ppm), probiotic bacteria (1.28 mg/ml), or CdCl2 and probiotic bacteria, for 15 m
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46

Meisgen, Thomas, Ewald Roemer, Lynda L. Conroy, et al. "Cigarette-Smoke- and Age-Dependent Oxidative Stress Effects in Rats." Beiträge zur Tabakforschung International/Contributions to Tobacco Research 26, no. 3 (2014): 109–20. http://dx.doi.org/10.2478/cttr-2014-0014.

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SUMMARYOxidative stress is a basic mechanism involved in both ageand smoking-related diseases. To test whether smoking affects young, old, and calorie-restricted organisms to the same extent, we assessed oxidative stress parameters in the lung, heart, and liver of male Fischer 344 rats (4 months old and 19-22 months old) exposed to air or cigarette mainstream smoke. Smoke-related effects were seen for parameters of DNA damage, lipid peroxidation, protein oxidation, and glycoxidation. No smoke-related effects were observed for DNA damage in the lung and heart (Comet assay) and for malondialdehy
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47

Mascarenhas, Maria do Socorro, Larissa Pires Mueller, Margareth Batistote, and Claudia Andrea Lima Cardoso. "Damage to deoxyribonucleic acid - DNA and its influence on ethanol production in industrial lines of Saccharomyces cerevisiae in relation to fermentative cycles." Revista de Biologia Neotropical / Journal of Neotropical Biology 19, no. 2 (2022): 69–77. http://dx.doi.org/10.5216/rbn.v19i2.74455.

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In industrial processes, more robust and tolerant Saccharomyces cerevisiae strains are needed, as stress conditions can affect these microorganisms and cause cellular changes. Thus, this study aimed to evaluate the genetic and physiological effect of fermentation cycles in industrial strains of S. cerevisiae. A pre-inoculum was performed by inoculating 0.10 g of Pedra-2, FT858 and Fleischmann yeasts in YPD 2% liquid medium and incubated at 30°C for 10 hours at 250 rpm. The cells were recovered and the biomass obtained was inoculated in sugarcane juice with 22°Brix at a temperature of 30°C at 2
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48

Li, Huai-Zhen, Di-Fu Guo, Long-Hua Qin, et al. "Optical Monitoring and Long-term Optical Spectral Variability of BL Lacertae Object S5 0716+714." Astrophysical Journal Supplement Series 277, no. 1 (2025): 18. https://doi.org/10.3847/1538-4365/adaeb6.

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Abstract We present photometric observations of the BL Lacertae object S5 0716+714 with a temporal resolution of 120 s in the Sloan i ′ and r ′ bands. These observations were conducted using the Comet Search Program telescope at Xingming Observatory from 2018 December 22 to 2020 February 15, and more than 5600 effective images were obtained on each filter across 79 nights. Additionally, we compiled long-term variability data spanning 34 yr in the optical UBVRI bands. Using the power-enhanced F-test and nested ANOVA test, we found intraday variability (IDV) on 31 nights and possible IDV on 20 n
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49

Agurell, Eva, Ann-Marie Hamreby, Jeanette Lind, Maud Palm, Gunilla Rylander, and Annmari Westman. "P XIV B.22 Comparison of effects induced in vivo by carbon tetrachloride, 1-ethyl-1-nitrosourea and methyl methanesulfonate using the alkaline comet assay." Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis 379, no. 1 (1997): S133. http://dx.doi.org/10.1016/s0027-5107(97)83078-3.

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50

Basiouni, Shereen, Nina Abel, Wolfgang Eisenreich, Helen L. May-Simera, and Awad A. Shehata. "Structural Analysis of Cardanol and Its Biological Activities on Human Keratinocyte Cells." Metabolites 15, no. 2 (2025): 83. https://doi.org/10.3390/metabo15020083.

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Background/Objectives: Cashew nutshell liquid (CNSL) is obtained during the industrial processing of cashew nuts. It contains anacardic acid (2-hydroxy-6-n-pentadecylbenzoic acid) and cardanol (3-n-pentadecylphenol). Therefore, CNSL provides a rich source of phenolic lipids serving as natural antioxidants or precursors for industrial uses. Here, we have analyzed in detail a commercial sample of cardanol by nuclear magnetic resonance (NMR) spectroscopy and its biological activities in the human keratinocyte cell line (HaCaT cells). Methods: The cytotoxic effects, genotoxicity, cell proliferatio
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