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15. The internal structure of magnetic nanoparticles determines the magnetic response

Author

Comunidad de Madrid, Ministerio de Economía y Competitividad (España), Czech Science Foundation, Pacakova, B., Kubickova, S., Salas, Gorka, Mantlikova, A. R., Marciello, Marzia, Morales, M. P., Niznansky, D., Vejpravova, J., Comunidad de Madrid, Ministerio de Economía y Competitividad (España), Czech Science Foundation, Pacakova, B., Kubickova, S., Salas, Gorka, Mantlikova, A. R., Marciello, Marzia, Morales, M. P., Niznansky, D., and Vejpravova, J.

Abstract

This work aims to emphasize that the magnetic response of single-domain magnetic nanoparticles (NPs) is driven by the NPs' internal structure, and the NP size dependencies of magnetic properties are overestimated. The relationship between the degree of the NPs' crystallinity and magnetic response is unambiguously demonstrated in eight samples of uniform maghemite/magnetite NPs and corroborated with the results obtained for about 20 samples of spinel ferrite NPs with different degrees of crystallinity. The NP samples were prepared by the thermal decomposition of an organic iron precursor subjected to varying reaction conditions, yielding variations in the NP size, shape and relative crystallinity. We characterized the samples by using several complementary methods, such as powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), high resolution TEM (HR-TEM) and Mössbauer spectroscopy (MS). We evaluated the NPs' relative crystallinity by comparing the NP sizes determined from TEM and PXRD and further inspecting the NPs' internal structure and relative crystallinity by using HR-TEM. The results of the structural characterization were put in the context of the NPs' magnetic response. In this work, the highest saturation magnetization (M) was measured for the smallest but well-crystalline NPs, while the larger NPs exhibiting worse crystallinity revealed a lower M. Our results clearly demonstrate that the NP crystallinity level that is mirrored in the internal spin order drives the specific magnetic response of the single-domain NPs.

Published
2017

24. Structural disorder versus spin canting in monodisperse maghemite nanocrystals

Author

European Commission, Ministry of Education, Youth and Sports (Czech Republic), Kubickova, S., Niznansky, D., Morales, M. P., Salas, Gorka, Vejpravova, J., European Commission, Ministry of Education, Youth and Sports (Czech Republic), Kubickova, S., Niznansky, D., Morales, M. P., Salas, Gorka, and Vejpravova, J.

Abstract

Monodisperse maghemite nanoparticles with diameter ranging from 7 to 20 nm were examined by the In-field Mössbauer Spectroscopy (IFMS) in varying external magnetic field up to 6 T. Surprisingly, the small-sized particles (7 nm) exhibit nearly no spin canting in contrast to the larger particles with lower surface-to-volume ratio. We demonstrate that the observed phenomenon is originated by lower relative crystallinity of the larger particles with different internal structure. Hence, the persistence of the 2nd and 5th absorption lines in the IFMS cannot be unambiguously assigned to the surface spins.

Published
2014

39. Impact of punctual mutations in the cap gene of Junonia coenia densovirus (JcDNV) on virus assembly and infectivity to Ld 652 cells and Spodoptera littoralis larvae

Author

Iatrou, Kostas, Couble, Pierre, Abd-Alla, A., Jousset, F-X., Cousserans, F., Bergoin, M., Abe, H., Fujii, T., Mita, K., Ajimura, M., Shimada, T., Sahara, K., Tamura, T., Altstein, M., Hariton, A., Davidovitch, M., Ben-Aziz, O., Barat-Houari, M., Hilliou, F., Jousset, F.-X., Sofer, L., Deleury, E., Rocher, J., Ravallec, M., Galibert, L., Feyereisen, R., Fournier, P., Volkoff, A-N., Baxter, Simon W., Chamberlain, Nicola, Papa, Riccardo, Humphray, Sean J., ffrench-Constant, Richard H., McMillan, W. Owen, Jiggins, Chris D., Behere, G.T., Russell, D., Batterham, P., Tay, W. T., Beldade, P., Rudd, S., Gruber, J.D., Long, A.D., Breugelmans, B., Simonet, G., de Velde, S. Van, Soest, S. Van, Smagghe, G., Broeck, J. Vanden, Clark, R., Brown, S., Heckel, D., Jiggins, C. D., Collins, S., Vogler, A. P, Chamberlain, N., Baxter, S., Jiggins, C., ffrench-Constant, R.H., Chortyk, O., Friz, J., Thompson, C., Kumar, P., Tice, C., Vertin, B., Palli, R., Kumar, M., Meyer, A., Meteyer, T., Smith, H., Cress, D., Li, B., Hormann, R., Collinge, Derek, Gordon, Karl, Behm, Carolyn, Whyard, Steve, Alençon, d', Audant, E., Bernard-Samain, P., Bidegainberry, S., Brehélin, V., Brun-Barale, M., Cousserans, A., Duvic, C., Escoubas, B., Feyereisen, J-M., Fournier, R., Gagneur, Ph., Gordon, C., Gimenez, K., Heckel, S., Hotelier, D., Hilliou, Th., Mita, F., Negre, K., Sabourault, V., Suraporn, C., Volkoff, S., Weissenbach, N., Maria, De Simone Anna, Angela, Sorrentino, Francesca, Di Cara, Polito, Lino, Anna, Digilio F., Drezen, J-M, Bezier, A., Lesobre, J., Huguet, E., Dupuy, C., Eleftherianos, I., Millichap, P. J., Felföldi, G., Gökcen, F., Waterfield, N., Clarke, D. J., ffrench-Constant, R. H., Reynolds, S. E., Elias, M., Joron, M., Willmott, K., Kaiser, V., Silva-Brandão, K. L., Freitas, A.V.L., Arias Mejía, C., Gomez Pineres, L.M., Brower, A.V.Z., Escoubas, J.-M., Girard, P.-A., Volkoff, N., Boublik, Y., D'Alençon, E., Taillez, P., Brehélin, M., Venekei, I., Fischer, H. M., Wheat, C. W., Wittstock, U., Heckel, D. G., Vogel, H., Freitak, D., Katsuma, S., Futahashi, R., Fujiwara, H., Garel, Annie, Briolay, Jérôme, Brouilly, Patrick, Royer, Corinne, Sasanuma, Shun-ichi, Sasanuma, Motoe, Keime, Céline, Gandrillon, Olivier, Chavancy, Gérard, Mita, Kasuei, Geber, M., Faye, I., Terenius, O., Goldsmith, M., Proestou, D., Carter, D., Nicholson, E., Wu, C., Zhang, H., Gopinathan, K. P., Parthasarathy, R., Dhawan, S., Gordon, K., Colebatch, G., Campbell, P.M., Horne, I., East, P.D., Hughes, T.M., Marcus, J.M., Serbielle, C., Douris, V., Lalmanach, G., Iatrou, K., Iga, Masatoshi, Sekimoto, Takayuki, Elmogy, Mohamed, Iwami, Masafumi, Sakurai, Sho, Jacquin-Joly, E., Merlin, C., Malpel, S., Pelletier, J., Brigaud, I., François, M-C., Maïbèche, M., Jarvis, D.L., Aumiller, J.J., Geisler, C., Hensley, J., Hollister, J.R., Shi, X., Jiggins, Chris D, Joron, Mathieu, Mallet, James, Jostova, P., Svatos, A., Pichova, Iva, Kadono-Okuda, K., Ito, K., Nohata, J., Yamamoto, K., Sasanuma, M., Sasanuma, S., Eguchi, R., Hara, W., Kiyokawa, I., Kobayashi, I., Uchino, K., Sezutsu, H., Kanda, T., Miura, T., Ohashi, T., Katayama, K., Kourti, A., Gkouvitsas, T., Kusakabe, T., Mon, H., Takahashi, M., Lee, J.M., Kawaguchi, Y., Labropoulou, V., Stefanou, D., Magkrioti, C., Andronopoulou, E., Swevers, L., Lapointe, R., Tanaka, K., Barney, W., Whitfield, J., Banks, J., Béliveau, C., Stoltz, D., Webb, B.A., Cusson, M., Lee, Siu Fai, Heckel, David G., Li, Yi, Guarino, Linda A., Li, Muwang, Li, Minhui, Guo, Qiuhong, Miao, Xuexia, Hou, Chengxiang, Lin, Hongxuan, Huang, Yongping, Li, Lan, Zheng, Sichun, Ladd, Tim, Zhang, Dayu, Buhlers, Deborah, Krell, Peter J., Arif, Basil M., Retnakaran, Arthur, Feng, Qili, Doucet, Daniel, Machado, Ednildo, Swevers, Luc, Makhijani, Kalpana, Bharathi, V, Kannan, Ramakrishnan, Shashidhara, L S, Mauchamp, Bernard, Jalabert, Audrey, Rocha, Martine Da, Grenier, Anne-Marie, Labas, Valérie, Vinh, Joëlle, Mita, Kazuei, Kadono-Okuda, Keiko, Miao, Yungen, Yue, Wanfu, Li, Xinghua, Wu, Xiaofeng, Miller, T.A., Park, Y., Ren, X., Kasahara, M., Sasaki, S., Nagayasu, Y., Yamada, T., Kanamori, H., Namiki, N., Kitagawa, M., Yamashita, H., Yasukochi, Y., Rvikumar, G., Shimomura, M., Nagamura, Y., Shin-I, T., Morishita, S., Sasaki, T., Sugahara, R., Monteiro, Antónia, Chen, Bin, Ramos, Diane, Kamal, Firdous, Glaser, Gary, Stockslager, Steven, Nieberding, C., Schneider, V., Vos, H. De, Lassance, J.M., Lofstedt, C., Brakefield, P.M., Nighorn, A., Papanicolaou, A., Blaxter, M.L., Jiggins, C.D., Papantonis, A., Sourmeli, S., Lecanidou, R., Rocha, M. Da, Royer, C., Pennacchio, F., Falabella, P., Varricchio, P., Malva, C., Pohl, Nelida, Sison-Mangus, Marilou, Briscoe, Adriana D., Saenko, S.V., Satish, V., Shukla, J.N., Nagaraju, J., Frank, Scholz, Tine, Lesch, Susann, Beez, Traute, Holthusen, Ines, Anderl, Geuenich, Silvia, Tina, Trenczek, Kojima, K., Niimi, T., Hatakeyama, M., Shiotsuki, Takahiro, Tan, An-Jiang, Tamura, Toshiki, Simpson, Robert, Newcomb, Richard, Beuning, Lesley, Yauk, Yah-Khing, Crowhurst, Ross, Gatehouse, Heather, Gatehouse, Laurence, Markwick, Ngaire, Chagne, Dave, Gleave, Andrew, Christeller, John, Strand, M. R., Soin, T., Loocke, K. Van, Wheelock, C., Harada, T., Akamatsu, M., Nakagawa, Y., Truman, JW, Hiruma, K, Allee, JP, MacWhinnie, SGB, Champlin, D, Riddiford, LM, Turnbull, M.W., Vitkova, M., Kubickova, S., Marec, F., Kroymann, J., Mithöfer, A., Boland, W., Vogt, R.G., Franco, M-d., Bohbot, J, Fernandez, K., Kobres, P., Hanna, J., Poppy, J., Webb, Bruce A., Gill, Torrence A., Fath-Goodin, Angelika, Kroemer, Jeremy, Wedde, M., Altincicek, B., Vilcinskas, A., Wee, Choon Wei, Robin, Charles, Heckel, David G, Wheat, Christopher W., Labandeira, Conrad, Andolfatto, P., Feng, Q., Simpson, R., Vogel, Heiko, Williams, A. K., Xia, Qingyou, Zhou, Zeyang, Lu, Cheng, Xiang, Zhonghuai, Zhang, Liang, Yamamoto, Kimiko, Narukawa, Junko, Nohata, Junko, Suetsugu, Yoshitaka, Minami, Hiroshi, Shimomura, Michihiko, Yukuhiro, K., Itoh, M., Banno, Y., Kômoto, N., Kosegawa, E., Hirokawa, M., Tatematsu, K., Nishimura, M., Maekawa, H., Kawanishi, Y., Nakajima, Y., and Krell, Peter J

Subjects
Article
Published
2007

44. A Comparative Study of Meiotic Recombination in Cattle (Bos taurus) and Three Wildebeest Species (Connochaetes gnou, C. taurinus taurinus and C. t. albojubatus).

Author

Vozdova, M., Sebestova, H., Kubickova, S., Cernohorska, H., Vahala, J., and Rubes, J.

Subjects
BOVIDAE, KARYOKINESIS, PLOIDY, CHROMOSOMES, IN situ hybridization, CENTROMERE
Abstract

The karyotypic evolution in the family Bovidae is based on centric fusions of ancestral acrocentric chromosomes. Here, the frequency and distribution of meiotic recombination was analyzed in pachytene spermatocytes from Bos taurus (2n = 60) and 3 wildebeest species (Connochaetes gnou, C. taurinus taurinus and C. t. albojubatus) (2n = 58) using immunofluorescence and fluorescence in situ hybridization. Significant differences in mean numbers of recombination events per cell were observed between B. taurus and members of the genus Connochaetes (47.2 vs. 43.7, p < 0.001). The number of MLH1 foci was significantly correlated with the length of the autosomal synaptonemal complexes. The average interfocus distance was influenced by interference. The male recombination maps of bovine chromosomes 2 and 25 and of their fused homologues in wildebeests were constructed. A significant reduction of recombination in the fused chromosome BTA25 was observed in wildebeests (p = 0.005). This was probably caused by interference acting across the centromere, which was significantly stronger than the intra-arm interference. This comparative meiotic study showed significant differences among the species from the family Bovidae with the same fundamental number of autosomal arms (FNa = 29) which differ by a single centric fusion. Copyright © 2013 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]

Published
2013
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45. Cytotypes of Kirk's Dik-Dik (Madoqua kirkii,Bovidae) Show Multiple Tandem Fusions.

Author

Cernohorska, H., Kubickova, S., Vahala, J., Robinson, T. J., and Rubes, J.

Subjects
*MADOQUA kirkii, *ANTELOPES, *CYTOGENETICS, *FLUORESCENCE in situ hybridization, *SATELLITE DNA
Abstract

Madoqua kirkii, a miniature African antelope, is noted for extensive chromosomal variation that has been categorized in four distinct cytotypes (A-D). In this investigation, we analyzed the A cytotype (2n = 46, FN = 48) using a suite of molecular cytogenetic approaches that entailed (i) whole chromosome and subchromosomal painting by fluorescence in situ hybridization (FISH), (ii) the study of Madoqua centromeric-specific DNA derived from pooled DNA obtained from the centromeric regions of the acrocentric chromosomes, and (iii) DNA from the telomere:centromere junctions of tandemly fused chromosomes. DNA from these sources was used to probe for the persistence of interstitial satellite DNA and residual centromeric sequences in the tandem and centric fusion junctions by PCR and FISH. The analyses show centromeric sequences at two of the six tandem fusion junctions. These data, and those of hybrid specimens (A × B cytotypes) in conjunction with published information permitted an interpretation of the probable sequence of chromosomal rearrangements among the M. kirkii cytotypes. We discuss the findings in the context of chromosomal evolution in these antelopes, and the implications that these hold for ex-situ breeding programs of the species. Copyright © 2010 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]

Published
2011
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46. Highly efficient mesenchymal stem cell proliferation on poly-ε-caprolactone nanofibers with embedded magnetic nanoparticles

Author

Daňková J, Buzgo M, Vejpravová J, Kubíčková S, Sovková V, Vysloužilová L, Mantlíková A, Nečas A, and Amler E

Subjects
Magnetic particles, mesenchymal stem cells, nanofibers, tissue engineering, Medicine (General), R5-920
Abstract

Jana Danková,1,2 Matej Buzgo,1,3,4 Jana Vejpravová,5 Simona Kubíčková,5 Věra Sovková,1,2 Lucie Vysloužilová,4,6 Alice Mantlíková,5 Alois Nečas,7 Evžen Amler1–31Laboratory of Tissue Engineering, Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic; 2Institute of Biophysics, Second Faculty of Medicine, Charles University in Prague, Prague, Czech Republic; 3Faculty of Biomedical Engineering, Czech Technical University in Prague, Kladno, Czech Republic; 4University Center for Energy Efficient Buildings, Czech Technical University in Prague, Bustehrad, Czech Republic; 5Department of Magnetic Nanosystems, Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic; 6Department of Nonwoven Textiles, Faculty of Textile Engineering, Technical University of Liberec, Liberec, Czech Republic; 7Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech RepublicAbstract: In this study, we have developed a combined approach to accelerate the proliferation of mesenchymal stem cells (MSCs) in vitro, using a new nanofibrous scaffold made by needleless electrospinning from a mixture of poly-ε-caprolactone and magnetic particles. The biological characteristics of porcine MSCs were investigated while cultured in vitro on composite scaffold enriched with magnetic nanoparticles. Our data indicate that due to the synergic effect of the poly-ε-caprolactone nanofibers and magnetic particles, cellular adhesion and proliferation of MSCs is enhanced and osteogenic differentiation is supported. The cellular and physical attributes make this new scaffold very promising for the acceleration of efficient MSC proliferation and regeneration of hard tissues.Keywords: magnetic particles, mesenchymal stem cells, nanofibers, tissue engineering

Published
2015

49. Correlation between integration of high--risk HPV genome into human DNA detected by molecular combing and the severity of cervical lesions: First results of the EXPL-HPV-002 study,Korelace mezi integrací genomu vysoce rizikových HPV do lidské DNA detekované molekulárním combingem a závažností cervikální léze: První výsledky EXPL-HPV-002 studie

Author

Bouchilloux, S., Fer, F., Lemée, F., Barradeau, S., Dvorak, V., Kubickova, S., Pavel Ventruba, Tachezy, R., Trnkova, M., Janda, P., Abscheidt, J., Annibal, E., El Mhali, D., Garcia, F., Kech, M., Pilger, G., Bensimon, A., and Mahé, F.

50. Sexing river buffalo (Bubalus bubalis L.), sheep (Ovis aries L.), goat (Capra hircus L.), and cattle spermatozoa by double color FISH using bovine (Bos taurus L.) X- and Y-painting probes

Author

Halina Cernohorska, Jiri Rubes, Svatava Kubickova, Giuseppe Enne, Dino Di Berardino, Miluse Vozdova, Gianfranco Coppola, Giuseppe Coppola, DI BERARDINO, Dino, Vozdova, M, Kubickova, S, Cernohorska, H, Coppola, Gianfranco, Coppola, Gf, Enne, G, and Rubes, J.

Subjects
Male, Sex Determination Analysis, X Chromosome, Buffaloes, Sexing, Biology, Andrology, Animal science, Species Specificity, FISH, spermatozoa, Y Chromosome, Genetics, medicine, Capra hircus, Animals, sexing, Ovis, In Situ Hybridization, In Situ Hybridization, Fluorescence, Fluorescent Dyes, Sheep, medicine.diagnostic_test, urogenital system, Goats, Lasers, Embryo, Cell Biology, biology.organism_classification, Sperm, Cattle, Bubalus, Ploidy, Developmental Biology, Fluorescence in situ hybridization
Abstract

River buffalo, sheep, and goat spermatozoa were cross-hybridized using double color fluorescence in situ hybridization (FISH) with bovine Xcen- and Y-chromosome painting probes, prepared by DOP-PCR of laser-microdissected-catapulted chromosomes, to investigate the possibility of using bovine probes for sexing sperm of other members of the family Bovidae. Before sperm analysis, the probes were hybridized on metaphase chromosomes of each species, as control. Frozen-thawed spermatozoa of cattle, river buffalo, sheep, and goat were decondensed in suspension with 5 mM DTT. Sperm samples obtained from three individuals of each species were investigated, more than 1,000 spermatozoa were scored in each animal. FISH analysis of more than 12,000 sperm revealed high level of sperm with X- or Y-signals in all of the species investigated, indicating FISH efficiency over 99%. Significant interspecific differences were detected in the frequency of aberrant spermatozoa (aneuploid and diploid) between goat (0.393%) and sheep (0.033%) (P

Published
2003
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