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Wyświetlanie 1-10 z 97
Tytuł:
Chromosome abnormalities in domestic sheep [Ovis aries]
Autorzy:
Long, S E
Tematy:
Ovis aries
translocation
chromosome abnormality
domestic sheep
sheep
karyotype
infertility
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/2046598.pdf  Link otwiera się w nowym oknie
Opis:
The clinical effects of twenty different chromosome anomalies in sheep are reviewed. It is concluded that not all anomalies give rise to reproductive problems or phenotypic variations. In particular, the centric fusion translocations appear not to have affected fertility and they have been helpful in determining the karyotype of the sheep.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Image processing of coarse and fine aggregate images
AMAS Workshop - SIAIC02, Warsaw, October 21-23, 2002
Conference Proceedings 3
Autorzy:
Walsh, P.
Long, A. E.
Crookes, D.
Qiao, Xiaoyu
Basheer, P. A. M.
Murtagh, F.
Współwytwórcy:
Kasperkiewicz, Janusz. Red.
Brandt, Andrzej Marek (1930– ). Red.
Wydawca:
Institute of Fundamental Technological Research Polish Academy of Sciences
Centre of Excellence for Advanced Materials and Structures
Powiązania:
Conference Proceedings AMAS
Opis:
Bibliogr. przy rozdz.
[231]-238 s. : il., rys., wykr. ; 24 cm
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
Tytuł:
Measurement of doublepolarization asymmetries in the quasi-elastic $^{3}\vec{He} \left ( \vec{e}, {e}d \right )$ process
Autorzy:
Pan, K.
Annand, J. R. M.
John, J. St.
Khanal, H. P.
Qui, X.
Posik, M.
Širca, S.
Dutta, C.
Ye, Z.
Golak, Jacek
Flay, D.
Nanda, S.
Averett, T.
Zhang, Y.
Muangma, N.
Jiang, X.
Schoenrock, B.
Allada, K.
Deur, A.
El Fassi, L.
Cates, G. D.
Monaghan, P.
LeRose, J.
Zhan, X.
Riordan, S.
Wang, Y.
Puckett, A. J. R.
Jensen, E.
Glamazdin, O.
Canan, M.
King, P.
Qian, X.
Parno, D.
Witała, Henryk
Mihovilovič, M.
Gao, H.
de Jager, C. W.
Lindgren, R.
Saha, A.
De Leo, R.
Garibaldi, F.
Viviani, M.
Tireman, W.
Kang, H.
Hansen, O.
Watson, J.
Zhao, B.
Gomez, J.
Sulkosky, V.
Long, E.
Lu, H.-J.
Zhu, L.
Qiang, Y.
Boeglin, W.
Gilad, S.
Chudakov, E.
Higinbotham, D. W.
Luo, W.
Moffit, B.
Shabestari, M.
Markowitz, P.
Sawatzky, B.
Subedi, R.
Huang, J.
Chen, C.
Gilman, R.
Kievsky, A.
Holmstrom, T.
Golge, S.
Anderson, B.
Chen, J. P.
Skibiński, Roman
Korsch, W.
Punjabi, V.
Deng, X.
Bradshaw, P.
Schiavilla, R.
Sauer, P. U.
Deltuva, A.
Jones, M.
Marcucci, L. E.
Shahinyan, A.
Urciuoli, G. M.
Wang, D.
Michaels, R.
Tobias, W. A.
Meziane, M.
Zhang, Y.-W.
Katich, J.
Piasetzky, E.
Norum, B. E.
Jin, G.
Wang, K.
Frullani, S.
Wojtsekhowski, B.
Ibrahim, H.
Camsonne, A.
Zheng, X.
Opis:
We present a precise measurement of double-polarization asymmetries in the $^{3}\vec{He} \left ( \vec{e}, {e}'d \right )$ reaction. This particular process is a uniquely sensitive probe of hadron dynamics in $^{3}He$ and the structure of the underlying electromagnetic currents. The measurements have been performed in and around quasielastic kinematics at $Q^{2}=0.25(GeV/c)^{2}$ for missing momenta up to 270  MeV/c. The asymmetries are in fair agreement with the state-of-the-art calculations in terms of their functional dependencies on $p_{m}$ and $\omega$ , but are systematically offset. Beyond the region of the quasielastic peak, the discrepancies become even more pronounced. Thus, our measurements have been able to reveal deficiencies in the most sophisticated calculations of the three-body nuclear system, and indicate that further refinement in the treatment of their two-and/or three-body dynamics is required.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Factors underlying persistently high radon levels in a house located in a karst limestone region of Ireland : lessons learned about remediation
Autorzy:
Long, S. C.
Fenton, D.
Scivyer, C.
Monahan, E.
Tematy:
karst geology
lessons learned
radon
remediation methods
Pokaż więcej
Wydawca:
Instytut Chemii i Techniki Jądrowej
Powiązania:
https://bibliotekanauki.pl/articles/147388.pdf  Link otwiera się w nowym oknie
Opis:
The remediation of buildings with elevated radon concentrations is generally straightforward. However, in some cases a number of attempts may be needed to reduce concentrations to below the reference level and, occasionally, it may be impossible to reduce concentrations to below the reference level in a cost effective way. This paper details the work carried out between 2004 and 2012 to reduce radon concentrations in a house with initial radon concentrations of almost 1500 Bq/m3. Over this period, high radon levels were consistently recorded despite the introduction of various radon remedial measures. Remedial work was carried out on ten occasions with 29 radon tests carried out to measure the effect of this work. The paper describes the structure of the house and the karst geology that it is built on and the likely contribution of these factors to the difficulties encountered reducing concentrations. Ultimately, radon concentrations were reduced to about 450 Bq/m3 but no further reductions were considered practicable without substantial and costly renovation to the house. Nonetheless, the remedial work carried out to date has resulted in a significant reduction in the risk to the homeowner of developing lung cancer. This work has also added to the understanding of radon remediation techniques in Ireland, particularly for houses built on karst limestone.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Early Histochemical Changes in Perinatal Asphyxia
Autorzy:
Myers, Ronald E.
Rodriguez de Curet, H.
Long, D. M.
Mossakowski, Mirosław Jan (1929–2001)
Klatzo, Igor
Wydawca:
Lawrence Ks.
Powiązania:
Journal of Neuropathology and Experimental Neurology
Opis:
Histochemical observations were carried out on newborn monkeys delivered by caesarean section at 153 to 163 days of gestation and immediately asphyxiated for approximately 12 minutes.The main histochemical finding consisted in widespread, abnormal accumulation of glycogen in glial cells (predominantly astrocytes) of both gray and white matter, which became conspicuous approximately 10 hours after asphyxia and tended to disappear after several days. Abnormal deposition of glycogen in glial cells was also demonstrated by electron microscopy.Glycogen accumulation was preceded by a marked increase in phosphorylases and UDPG-glycogen transferase activities already demonstrable in animals sacrificed 1 hour after asphyxia.Similarly early was the appearance of abnormal activity of aminopeptidase in neuronal groups which were shown to be especially susceptible to asphyxia and displayed evidence of histopathological damage at later stages.The changes in respiratory enzymes were generally of a nature previously described, and they were characterized mainly by reduction in the activity of individual enzymes in regions of the gray matter which later showed evidence of histopathological damage.Disturbances of the blood-brain barrier were demonstrable in animals sacrificed 10 hours and later after asphyxia. The main feature consisted in selective localization of the tracer in the cellular components of the parenchyma, mainly in the neurons. The changes were confined mostly to the gray matter without any clear correlation to the intensity of the histopathological damage.
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
Tytuł:
The Effect of Hypothermia on Electric Impedance and Penetration of Substances from the CSF into the Periventricular Brain Tissue
Autorzy:
Rasmussen, L. E.
Chou-Lu, Li
Long, D.
Mossakowski, Mirosław Jan (1929–2001)
Bak, A. F.
Parker, L. O.
Klatzo, Igor
Wydawca:
Elsevier
Powiązania:
Progress in Brain Research
Opis:
Lowering the temperature of the brain can affect it in either a beneficial or an adverse manner. The ability of mild hypothermia to reduce brain volume has been extensively used by neurosurgeons in alleviating increased intracranial pressure and cerebral edema. On the other hand, a number of adverse effects have been reported following cooling of the brain below 28°C. At these temperatures numerous clinical complications (such as cerebral edema or hypoxic brain injury) and experimental disturbances (such as a breakdown of the blood-brain barrier) have been reported (Brendel et al., 1966). A further elucidation of the basic changes due to lowering brain temperature appears to be of considerable importance.Hypothermia causes an increase in the electric impedance of brain tissue in the rabbit (Collewijn and Schade, 1962, 1964). This increase was thought to be a result of changed physical properties of the tissue since a similar change was found in electrolyte solutions at corresponding temperatures (Collewijn and Schade, 1962).Recently a series of experiments were designed in our laboratory (Li et al., 1966) for the study of physiological changes in the brain under hypothermia. These experiments show that impedance changes recorded from the grey matter at temperatures above 20°C were in accordance with temperature coefficients of the blood serum and NaCl solution. Below this temperature, the changes were greater than those recorded from serum and electrolyte fluid. These observations probably reflect changes in the electrolyte and extracellular compartments, as has been reported to occur in asphyxia (Van Harreveld, 1957).It was then conjectured that alteration in such basic properties of nervous parenchyma should influence penetration of various substances from the cerebrospinal fluid (CSF) (Davson and Spaziani, 1962). After crossing the ependymal barrier the substances can migrate further in several ways. Generally, the inert, extracellular compounds, such as inulin, may spread primarily by passive diffusion through extracellular spaces (Rail et al., 1962), whereas, an active transport mechanism has been implicated in penetration of diverse substances such as histamine (Draskoci et a!., 1960), amino acids(Lajtha, 1962; Levin et al., 1966), and albumin (Klatzo et a!., 1964).The purpose of the present study is to correlate some of the electrophysiological data obtained after brain cooling with observations on periventricular penetration of substances, selected for their association with either diffusion or active transport.
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
Tytuł:
The Refurbished Z Facility: Capabilities and Recent Experiments
Autorzy:
Matzen, M.
Atherton, B.
Cuneo, M.
Donovan, G.
Hall, C.
Herrmann, M.
Kiefer, M.
Leeper, R.
Leifeste, G.
Long, F.
Mckee, G.
Mehlhorn, T.
Porter, J.
Schneider, L.
Struve, K.
Stygar, W.
Weinbrecht, E.
Tematy:
52.58.Lq
52.59.Qy
64.60.A-
81.30.Bx
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/1807851.pdf  Link otwiera się w nowym oknie
Opis:
The Z Refurbishment Project was completed in September 2007. Prior to the shutdown of the Z facility in July 2006 to install the new hardware, it provided currents of ≤ 20 MA to produce energetic, intense X-ray sources ( ≈1.6 MJ, > 200 TW) for performing high energy density science experiments and to produce high magnetic fields and pressures for performing dynamic material property experiments. The refurbishment project doubled the stored energy within the existing tank structure and replaced older components with modern, conventional technology and systems that were designed to drive both short-pulse Z-pinch implosions and long-pulse dynamic material property experiments. The project goals were to increase the delivered current for additional performance capability, improve overall precision and pulse shape flexibility for better reproducibility and data quality, and provide the capacity to perform more shots. Experiments over the past year have been devoted to bringing the facility up to full operating capabilities and implementing a refurbished suite of diagnostics. In addition, we have enhanced our X-ray backlighting diagnostics through the addition of a two-frame capability to the Z-Beamlet system and the addition of a high power laser (Z-Petawatt). In this paper, we will summarize the changes made to the Z facility, highlight the new capabilities, and discuss the results of some of the early experiments.
Dostawca treści:
Biblioteka Nauki
Artykuł
Autorzy:
Dong, Guang-Hui
Ding, Yizhen
Chen, Shi
Knibbs, Luke D.
Markevych, Iana
Dadvand, Payam
Yang, Bo-Yi
Heinrich, Joachim
Yi-Dan Zhang
Lu Wang
Gang-Long Zhou
Liu, Kang-Kang
Zhao, Tianyu
Browning, Matthew H.E.M.
Opis:
Background: Potential effect of greenspace exposure on human microbiota have been explored by a number of observational and interventional studies, but the results remained mixed. We comprehensively synthesized these studies by performing a systematic review following Preferred Reporting Items for Systematic Reviews and Meta- Analyses guidelines. Methods: Comprehensive literature searches in three international databases (PubMed, Embase, and Web of Science) and three Chinese databases (China National Knowledge Infrastructure, Wanfang, and China Biology Medicine disc) were conducted from inception to November 1, 2023. Observational and interventional studies that evaluated associations between greenspace exposure and human microbiota at different anatomical sites were included. Studies were assessed using the National Toxicology Program’s office of Health Assessment and Translation risk of bias tool and certainty of evidence was assessed using the Grading of Recommendations, Assessment, Development and Evaluation framework. Two authors independently performed study selection, data extraction, and risk of bias assessment, and evidence grading. Study results were synthesized descriptively. Results: Twenty studies, including 11 observational studies and 9 interventional studies, were finally included into the systematic review. The microbiota of the included studies was from gut (n = 13), skin (n = 10), oral cavity (n = 5), nasal cavity (n = 5) and eyes (n = 1). The majority of studies reported the associations of greenspace exposure with increased diversity (e.g., richness and Shannon index) and/or altered overall composition of human gut (n = 12) and skin microbiota (n = 8), with increases in the relative abundance of probiotics (e.g., Ruminococcaceae) and decreases in the relative abundance of pathogens (e.g., Streptococcus and Escherichia/Shigella). Due to limited number of studies, evidence concerning greenspace and oral, nasal, and ocular microbiota were still inconclusive.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
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