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AbstractAbstract
[en] A functional relationship determining the survival curve for reproductive cell death caused by low -LET radiation is derived on the basis of Lea's repair/interaction model. Radiation-induced primary lesions are assumed to interact pair-wise to form long-lived lethal lesions, simultaneously with the repair of the primary lesions. The formula derived for a short single irradiation gives a typical shouldered survival curve. At doses below the shoulder the interaction entirely occurs at low levels of primary lesion concentration, resulting in the parabolic shape of the logarithmic survival curve. At higher doses the interaction initially proceeds at high levels of primary lesion concentration, a state whose duration is determined by the dose and the finite speed of the first-order reaction of repair; this initial phase of the interaction results in the exponential tail of the survival curve. Survival after fractionated and protracted irradiation are also obtained. The dependence of cell survival on the irradiation conditions can be interpreted in terms of the basic parameters of the model. (author)
Primary Subject
Source
11. L.H. Gray conference on cellular repair of radiation damage: mechanisms and modifying agents; Glasgow (UK); 18-22 Jul 1983
Record Type
Journal Article
Literature Type
Conference
Journal
British Journal of Cancer; ISSN 0007-0920;
; v. 49(suppl. 6); p. 243-247

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INIS VolumeINIS Volume
INIS IssueINIS Issue
Harley, K; Van Heijster, P; Pettet, G J; Marangell, R; Wechselberger, M, E-mail: ke.harley@student.qut.edu.au2014
AbstractAbstract
[en] We prove the existence of novel, shock-fronted travelling wave solutions to a model of wound healing angiogenesis studied in Pettet et al (2000 IMA J. Math. App. Med. 17 395–413) assuming two conjectures hold. In the previous work, the authors showed that for certain parameter values, a heteroclinic orbit in the phase plane representing a smooth travelling wave solution exists. However, upon varying one of the parameters, the heteroclinic orbit was destroyed, or rather cut-off, by a wall of singularities in the phase plane. As a result, they concluded that under this parameter regime no travelling wave solutions existed. Using techniques from geometric singular perturbation theory and canard theory, we show that a travelling wave solution actually still exists for this parameter regime. We construct a heteroclinic orbit passing through the wall of singularities via a folded saddle canard point onto a repelling slow manifold. The orbit leaves this manifold via the fast dynamics and lands on the attracting slow manifold, finally connecting to its end state. This new travelling wave is no longer smooth but exhibits a sharp front or shock. Finally, we identify regions in parameter space where we expect that similar solutions exist. Moreover, we discuss the possibility of more exotic solutions. (paper)
Primary Subject
Source
Available from http://dx.doi.org/10.1088/0951-7715/27/12/2975; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Nonlinearity (Print); ISSN 0951-7715;
; v. 27(12); p. 2975-3003

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Reference NumberReference Number
INIS VolumeINIS Volume
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Kong, Fanhou; Xu, Weichang; Zhang, Xuelong; Wang, Xin; Zhang, Yu; Wu, Jinglong, E-mail: kongfanhou@163.com2018
AbstractAbstract
[en] Based on the principle of emulsion technology and self-assembly of materials, aromatic isocyanate derivatives easily reacted with polyols to form polyurethanes, and nonaromatic isocyanate derivatives were responsible for generating the capsule core of the self-healing microcapsules. In this paper, epoxy resin-based self-healing smart anticorrosion coatings with different types of microcapsules were prepared. The cores were IPDI/TMP–IPDI/DiPE–IPDI. The optimal conditions for the preparation of self-repairing microcapsules to achieve controlled assembly of a microcapsule material structure were determined. We set up a test model, incorporating thermal analysis, depression repair level calculation, salt spray corrosion tests, adhesion tests, and other indicators of application performance. The corrosion resistance was in the order: DiPE–IPDI > TMP–IPDI > IPDI > pure epoxy. The experimental results showed a self-healing efficiency of more than 80% for cores of DiPE–IPDI. Taking into account the overall properties, the best-quality coatings contained approximately 5% microcapsules of DiPE–IPDI.
Primary Subject
Source
Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
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Reference NumberReference Number
INIS VolumeINIS Volume
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AbstractAbstract
[en] The high radiosensitivity of the lymphoid tissues is mainly due to a high interphase death of lymphocytes. The lymphoid tissues functionally show a high radiosensitivity as has been observed for other cell renewal systems such as bone marrow, gut and skin. Repopulation of lymphoid tissues with immune responsive precursor cells occurs more slowly than repopulation of haemoporetic tissues with stem cells
Primary Subject
Source
Gomez Lopez, J.; Bonmati, J.; Berry, R.J.; Hopewell, J.W. (eds.); International Congress Series; no. 338; v. 1 p. 626-629; ISBN 9021902591;
; 1974; Excerpta Medica; Amsterdam; 13. International congress of radiology; Madrid, Spain; 15 Oct 1973

Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] This study was aimed at evaluating the sanitary harmlessness of radiation-treated food products. The procedure used involved biological and microbiological tests, physicochemical analyses, and organoleptic studies. (E.T.)
Original Title
Sanitarnaya bezvrednost' pishchevykh produktov, podvergaemykh radiatsionnoj obrabotke
Primary Subject
Source
Sovet Ehkonomicheskoj Vzaimopomoshchi, Moscow (USSR). Postoyanniya Komissiya po Ispol'zovaniyu Atomnoj Ehnergii v Mirnykh Tselyakh; p. 441-451; 1974; Symposium on radiation processing of food and agricultural products; Sofia, Bulgaria; 15 Oct 1973
Record Type
Report
Literature Type
Conference
Report Number
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Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The authors propose a model for the maximum repair factor which is independent of the saturation effect of the maximum Elkind repair, and present experimental dose-response curves for the survival rates of V-79 cells for comparison. It is pointed out that the parabolic shape of the dose-response curve makes it possible to explain the progressive weakening of the CFU of the surviving cells which goes on with increasing dose. (U.K.)
Primary Subject
Record Type
Journal Article
Journal
Physics in Medicine and Biology; ISSN 0031-9155;
; v. 29(7); p. 895-898

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Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Mekid, Samir; Saheb, Nouari; Khan, Shafique M A; Qureshi, Khurram K, E-mail: smekid@kfupm.edu.sa2015
AbstractAbstract
[en] Further to prior development in enhancing structural health using smart materials, an innovative class of materials characterized by the ability to feel senses like humans, i.e. ‘nervous materials’, is discussed. Designed at all scales, these materials will enhance personnel and public safety, and secure greater reliability of products. Materials may fail suddenly, but any system wishes that failure is known in good time and delayed until safe conditions are reached. Nervous materials are expected to be the solution to this statement. This new class of materials is based on the novel concept of materials capable of feeling multiple structural and external stimuli, e.g. stress, force, pressure and temperature, while feeding information back to a controller for appropriate real-time action. The strain–stress state is developed in real time with the identified and characterized source of stimulus, with optimized time response to retrieve initial specified conditions, e.g. shape and strength. Sensors are volumetrically embedded and distributed, emulating the human nervous system. Immediate applications are in aircraft, cars, nuclear energy and robotics. Such materials will reduce maintenance costs, detect initial failures and delay them with self-healing. This article reviews the common aspects and challenges surrounding this new class of materials with types of sensors to be embedded seamlessly or inherently, including appropriate embedding manufacturing techniques with modeling and simulation methods. (focus issue review)
Primary Subject
Source
Available from http://dx.doi.org/10.1088/1468-6996/16/3/034607; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Science and Technology of Advanced Materials; ISSN 1468-6996;
; v. 16(3); [15 p.]

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INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Multiple shoot development and plant regeneration were achieved from nodal segments of Phyla nodiflora. Percentage of shoot regeneration was highest (90) when the explants were cultured on MS medium supplemented with 2-3 mg/l BA. The MS medium supplemented with 2 mg/l Kin was found most effective for shoot multiplication where number of shoots per explant was found maximum (5.7). Highest shoot elongation (4.9 cm) was found when medium was supplemented with 1 mg/l GA3. Supplementation of 1 and 1.5 mg/l IBA in half strength of MS medium appeared best for early rooting (15-20 days). However, highest per cent (85) of cuttings rooted on 1 mg/l NAA. Highest number (6.8) and length (2.8 cm) of roots per microcuttings were obtained in 1.0 mg/l IBA supplemented medium. The complete plants were gradually acclimatized and eventually transferred to soil.(authors)
Primary Subject
Source
12 refs., 6 figs., 2 tabs.
Record Type
Journal Article
Journal
Nuclear Science and Applications (1989); ISSN 1016-197X;
; v. 15(1); p. 76-79

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Zainol, N.A.; Voo, S.C.; Sarmidi, M.R.; Aziz, R.A.
The Malaysian Analytical Sciences Society (ANALIS), International Education Center (INTEC), UiTM Shah Alam, Selangor (Malaysia)2008
The Malaysian Analytical Sciences Society (ANALIS), International Education Center (INTEC), UiTM Shah Alam, Selangor (Malaysia)2008
AbstractAbstract
[en] Centella Asiatica is one of those phyto chemical that has been consume for hundreds years and it is claimed that the plant possess various healing effect and antioxidant properties. For many years, a lot of commercial and medicinal researches have been focusing their resources on this plant. Hence, the profiling of this plant is vital. This study was done to investigate the behaviour of active components in two different accessions commercially grown in Johore Bahru. Research procedures were carried out according to the modified method utilizing TLC and HPLC analysis method. The findings suggested that in different parts of Centella Asiatica contain different amount of phytochemicals. The highest concentration of phytochemicals was found in the second accession that was asiaticoside (2.56 μg/ ml), madecasoside (5.30 μg/ ml) and asiatic acids (3421.60 μg/ ml). Leaves contain a higher concentration of those phytochemicals relative to the petioles and the roots. (author)
Primary Subject
Secondary Subject
Source
2 tab. Abstract and full text available in http://pkukmweb.ukm.my/mjas/; Official journal of The Malaysian Analytical Sciences Society (ANALIS)
Record Type
Journal Article
Journal
Malaysian Journal of Analytical Sciences; ISSN 1394-2506;
; v. 12(2); p. 322-327

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AbstractAbstract
[en] The sensitivity of the black hole spectrum when introducing short distance dispersion is studied in the context of atomic Bose condensates. By considering flows characterized by several length scales, we show that, while the spectrum remains remarkably Planckian, the temperature is no longer fixed by the surface gravity. Rather it is determined by the average of the flow gradient across the horizon over an interval fixed by the healing length and the surface gravity, as if the horizon were broadened. This remains valid as long as the flow does not induce nonadiabatic effects that produce oscillations or some parametric amplification of the flux.
Primary Subject
Source
(c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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