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Journal articles on the topic 'Generic Preformation'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Powell, Graham R. "On buds man." Forestry Chronicle 84, no. 4 (2008): 590–94. http://dx.doi.org/10.5558/tfc84590-4.

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The nature of scaly buds, homologies of their bud scales and degrees of preformation of contained leaf primordia are briefly described. Distinction is made among vegetative, reproductive, mixed, latent, and adventitious buds. Character of buds as associated with position along and around their supporting shoots and with relative vigour of those supporting shoots is discussed. Reference is made to how knowledge of buds and their fates is useful not only in species identification but also in understanding and modelling development of tree crowns, and in how inter- and intra-generic differences m

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2

Mensch, Jennifer. "Genealogy and Critique in Kant’s Organic History of Reason." Con-Textos Kantianos. International Journal of Philosophy, no. 1 (June 11, 2015): 176–94. https://doi.org/10.5281/zenodo.18512.

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Although scholarly attention has been mostly paid to the many connections existing between Kant and the <em>exact</em> sciences, the landscape of Kant studies has begun to noticeably change during the last decade, with many new pieces devoted to a consideration of Kant’s relation to the life sciences of his day.  It is in this vein, for example, that investigators have begun to discuss the importance of Kant’s essays on race for the development of Anthropology as an emerging field.  The bulk of the contributions to this recent trend, however, have focused on Kant’s

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3

Kaur, Manpreet, BirBikram Singh, S. K. Patra, and P. K. Raina. "Alpha clustering in ^{41, 45, 49}Ca^* nuclei formed in neutron induced reactions." Journal of Physics: Conference Series 2663, no. 1 (2023): 012049. http://dx.doi.org/10.1088/1742-6596/2663/1/012049.

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Abstract The light neutron-rich nuclei play a vital role in nucleosynthesis process and the extent of alpha (α) clustering significantly influence the astrophysical rates. Thus, it is significant to explore the α clustering in these nuclei and in the present work, we have studied the α clustering in 41,45,49Ca* nuclei formed in neutron induced reactions within the dynamical cluster decay model (DCM). The results present that with progression towards neutron-rich 45Ca* and 49Ca* nuclei, there is a significant decrease in the α-cluster preformation factor P0. The inclusion of relativistic mean f

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4

Balasubramaniam, M., and N. S. Rajeswari. "An empirical relation for cluster decay preformation probability." International Journal of Modern Physics E 23, no. 03 (2014): 1450018. http://dx.doi.org/10.1142/s0218301314500189.

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Empirical relations for the preformation probability of cluster decay process in terms of the Q-value, mass asymmetry (η), mass number of the emitted cluster A2 is analyzed based on the discrepancy between the calculated and experimental half-lives of the cluster emitters. For the different empirical expressions considered corresponding to different physical quantities the preformation probability for the complete binary breakup of 226 Ra is calculated and the obtained results are compared with the preformed cluster model calculation (P0( PCM )) and another calculation in which the overlapping

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5

Colonnetta, Megan M., Yogesh Goyal, Heath E. Johnson, Sapna Syal, Paul Schedl, and Girish Deshpande. "Preformation and epigenesis converge to specify primordial germ cell fate in the early Drosophila embryo." PLOS Genetics 18, no. 1 (2022): e1010002. http://dx.doi.org/10.1371/journal.pgen.1010002.

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A critical step in animal development is the specification of primordial germ cells (PGCs), the precursors of the germline. Two seemingly mutually exclusive mechanisms are implemented across the animal kingdom: epigenesis and preformation. In epigenesis, PGC specification is non-autonomous and depends on extrinsic signaling pathways. The BMP pathway provides the key PGC specification signals in mammals. Preformation is autonomous and mediated by determinants localized within PGCs. In Drosophila, a classic example of preformation, constituents of the germ plasm localized at the embryonic poster

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6

Johnson, Andrew D., Emma Richardson, Rosemary F. Bachvarova, and Brian I. Crother. "Evolution of the germ line–soma relationship in vertebrate embryos." REPRODUCTION 141, no. 3 (2011): 291–300. http://dx.doi.org/10.1530/rep-10-0474.

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The germ line and soma together maintain genetic lineages from generation to generation: the germ line passes genetic information between generations; the soma is the vehicle for germ line transmission, and is shaped by natural selection. The germ line and somatic lineages arise simultaneously in early embryos, but how their development is related depends on how primordial germ cells (PGC) are specified. PGCs are specified by one of two means. Epigenesis describes the induction of PGCs from pluripotent cells by signals from surrounding somatic tissues. In contrast, PGCs in many species are spe

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7

Li, Jun, Tongji Li, Qingjun Song, and Chaofei Ma. "Performance Evaluation of Four Ocean Reflectance Model." Remote Sensing 13, no. 14 (2021): 2748. http://dx.doi.org/10.3390/rs13142748.

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Phytoplankton are the main factors influencing light under the sea surface in Case Ι water. The ocean reflectance model (ORM), which takes into account the chlorophyll a concentration data, can calculate the remote sensing reflectance of Case Ι water. In this study, we examined the differences and performance of four ORMs, including Morel and Maritorena (2001, MM01), Morel and Gentili (2007, MG07), Mobley (2014, MO14), and Hydrolight Abcase1 Lookup Tables. The differences between the four ORMs in terms of their absorption and backscattering coefficients were evaluated. Preformation of the four

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8

Spann*, Timothy M., Robert H. Beede, Steven A. Weinbaum, and Theodore M. DeJong. "Effect of Rootstock on Shoot Preformation and Neoformation in Pistachio cv. Kerman." HortScience 39, no. 4 (2004): 760C—760. http://dx.doi.org/10.21273/hortsci.39.4.760c.

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Rootstock significantly alters the pattern of shoot growth of pistachio (Pistacia vera) cv. Kerman. Trees on P. atlantica typically produce a single flush of spring growth whereas trees on P. integerrima selection PGI and P. atlantica × P. integerrima selection UCB-1 can produce multiple flushes during the season. Terminal buds of shoots on all three rootstocks were dissected during the dormant season to determine the number of preformed nodes. Data indicate that there are 8-9 nodes preformed in the dormant terminal bud of shoots from Kerman trees and that this number is independent of rootsto

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9

Lovas, R. G. "Preformation of alpha-clusters in alpha-decay." Journal of Physics: Conference Series 863 (June 2017): 012011. http://dx.doi.org/10.1088/1742-6596/863/1/012011.

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10

Qian, YiBin, та ZhongZhou Ren. "Model-independent trend of α-preformation probability". Science China Physics, Mechanics and Astronomy 56, № 8 (2013): 1520–24. http://dx.doi.org/10.1007/s11433-013-5159-5.

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11

Cheung, Tobias. "The Hidden Order of Preformation: Plans, Functions, and Hierarchies in the Organic Systems of Louis Bourguet, Charles Bonnet and Georges Cuvier." Early Science and Medicine 11, no. 1 (2006): 11–49. http://dx.doi.org/10.1163/157338206775569754.

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AbstractIn eighteenth-century French natural history, the notion of preformation was not only a model for a small preexisting embryo that gradually extended its shape through the influx of particles, but also for an order that coordinated the dynamic relation between organic parts. Preformation depended therefore also on a hidden order behind the continuity of visible forms. Louis Bourguet, Charles Bonnet, and Georges Cuvier distinguished three organizational levels: First, the synchronic or functional order of organic systems; second, the diachronic order of the initiation of mechanical proce

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12

LUDU, A., W. GREINER, and A. SANDULESCU. "ON THE PREFORMATION FACTORS IN ALPHA DECAY." International Journal of Modern Physics E 02, no. 04 (1993): 855–72. http://dx.doi.org/10.1142/s0218301393000406.

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Alpha decay is described as a new large amplitude collective motion in nuclei. The total energy is evaluated in the frame of the nonlinear hydrodynamics approach which leads to the formation of solitons on the nuclear surface. A new minimum appears in the total energy due to the shell effects for 208 Pb and 4 He introduced phenomenologically. The minimum was chosen to be degenerate with the ground state minimum. Consequently a new coexistence model consisting of the usual shell model and an alpha particle cluster-like model describing a soliton moving on the nuclear surface is obtained. The co

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13

Gao-Long, Zhang, та Le Xiao-Yun. "α preformation and penetration probability for heavy nuclei". Chinese Physics B 18, № 9 (2009): 3810–14. http://dx.doi.org/10.1088/1674-1056/18/9/032.

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14

Short, R. V. "The ovary of Eve: egg and sperm and preformation." BioEssays 20, no. 12 (1999): 1056. http://dx.doi.org/10.1002/(sici)1521-1878(199812)20:12<1056::aid-bies16>3.0.co;2-o.

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15

Monti, Maria Teresa. "Epigenesis of the Monstrous Form and Preformistic 'Genetics' (Lémery - Winslow - Haller)." Early Science and Medicine 5, no. 1 (2000): 3–32. http://dx.doi.org/10.1163/157338200x00272.

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AbstractThe present essay analyzes an eighteenth-century phase of the querelle des monstres and highlights two main points. 1) As the cases of Lémery and Winslow demonstrate, in the period when preformation was the dominant view, the dispute over the origin of monsters carried into the very field of preformation the contrast which had originally opposed it to the now defeated model of epigenesis, namely the alternative between mechanical genesis and pre-existence of the monstrous form itself. 2) One of the most important episodes in the shift of teratology from a primarily theological or metap

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16

Riddle, J. M. "The Ovary of Eve: Egg and Sperm and Preformation." JAMA: The Journal of the American Medical Association 280, no. 22 (1998): 1961—a—1962. http://dx.doi.org/10.1001/jama.280.22.1961-a.

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17

Alsaif, Norah A. M., and Saad M. Saleh Ahmed. "Alpha-cluster preformation probability in even-even actinide nuclei." Results in Physics 12 (March 2019): 1158–62. http://dx.doi.org/10.1016/j.rinp.2018.12.083.

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18

Poenaru, D. N., and R. A. Gherghescu. "Cluster preformation at the nuclear surface in cold fission." EPL (Europhysics Letters) 118, no. 2 (2017): 22001. http://dx.doi.org/10.1209/0295-5075/118/22001.

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19

Meloche, Christopher G., and Pamela K. Diggle. "Preformation, architectural complexity, and developmental flexibility inAcomastylis rossii(Rosaceae)." American Journal of Botany 88, no. 6 (2001): 980–91. http://dx.doi.org/10.2307/2657079.

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20

Dawson, Virginia P. (Virginia Parker). "The Ovary of Eve: Egg and Sperm and Preformation (review)." Bulletin of the History of Medicine 73, no. 3 (1999): 497–98. http://dx.doi.org/10.1353/bhm.1999.0107.

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21

Kaur, Jagdeep, Mahinderpal Sharma, Rita Chhetri, and Amandeep Kaur. "Exploring Isotope Production through 2n-Emission in Reactions Induced by ⁴⁸Ca: A Theoretical Investigation." Journal of Physics: Conference Series 2663, no. 1 (2023): 012058. http://dx.doi.org/10.1088/1742-6596/2663/1/012058.

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Abstract In this investigation, we employ the Dynamical Cluster-decay Model (DCM) approach to scrutinize the fragmentation channels emerging from 245Es* and 251Md*. These nuclei are produced through 48Ca+197Au and 48Ca+203Tl reactions with similar beam energies of approximately 210.0 MeV and 212.7 MeV. This methodology involves adjusting the neck formation (ΔR) within the DCM framework to compute 2n-emission cross-sections for these systems. These calculated cross-sections are then juxtaposed against experimental data to validate the predictive capabilities of the model. Furthermore, this stud

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22

Liu, Hong-Ming, Jun-Yao Xu, Jun-Gang Deng, Biao He та Xiao-Hua Li. "Predictions of α decay half-lives for even–even superheavy nuclei with 104 ≤ Z ≤ 128 based on two-potential approach within cluster-formation model". International Journal of Modern Physics E 28, № 10 (2019): 1950089. http://dx.doi.org/10.1142/s0218301319500897.

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In this work, we systematically study the [Formula: see text] decay half-lives of 170 even–even nuclei with [Formula: see text] within the two-potential approach while the [Formula: see text] decay preformation factor [Formula: see text] is obtained by the cluster-formation model. The calculated results can well reproduce the experimental data. In addition, we extend this model to predict the [Formula: see text] decay half-lives of 64 even–even nuclei with [Formula: see text] whose [Formula: see text] decay is energetically allowed or observed but not yet quantified. For comparison, the two fa

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23

Gutowsky, Sarah E., Michael H. Janssen, and D. Ryan Norris. "The Preformative Molt of Marbled Murrelets." Northwestern Naturalist 91, no. 3 (2010): 333–36. http://dx.doi.org/10.1898/nwn10-02.1.

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24

Czaplik, Waldemar Maximilian, Matthias Mayer, Sabine Grupe, and Axel Jacobi von Wangelin. "On direct iron-catalyzed cross-coupling reactions." Pure and Applied Chemistry 82, no. 7 (2010): 1545–53. http://dx.doi.org/10.1351/pac-con-09-10-10.

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A new methodology for the direct cross-coupling reaction between aryl halides and alkyl halides under iron catalysis is described. Unlike conventional protocols, the direct cross-coupling obviates the need for the preformation of stoichiometric amounts of Grignard species and thus exhibits a reduced hazard potential. The underlying one-pot reaction involves iron-catalyzed Grignard formation followed by a rapid cross-coupling step. Mechanistic data on the role of N,N,N',N'-tetramethylethylenediamine (TMEDA) as additive, the concentration of intermediates, and the nature of the catalyst species

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25

Aydelotte, Allison R., and Pamela K. Diggle. "Analysis of developmental preformation in the alpine herb Caltha leptosepala (Ranunculaceae)." American Journal of Botany 84, no. 12 (1997): 1646–57. http://dx.doi.org/10.2307/2446462.

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26

Xing, Liuxi, Pan Liao, Hangjie Mo, Dongfang Li, and Dong Sun. "Preformation Characterization of a Torque-Driven Magnetic Microswimmer With Multi-Segment Structure." IEEE Access 9 (2021): 29279–92. http://dx.doi.org/10.1109/access.2021.3058527.

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27

Gardner, R. L., M. A. Surani, and D. Solter. "Introduction." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 358, no. 1436 (2003): 1313–15. http://dx.doi.org/10.1098/rstb.2003.1335.

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The elaboration of a physiologically integrated organism from a fertilized egg depends on processes of cellular growth and diversification that require very precise coordination in both space and time. The extent to which the final outcome is presaged in the egg is an issue that has engaged those seeking to explain embryonic development since antiquity. According to the concept of preformation espoused by Charles Bonnet, the new organism was already present in its final form in the egg, so that development simply entailed enlargement without any accompanying increase in complexity (Oppenheimer

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28

Seyyedi, S. A. "Systematic study of alpha-decay of super-heavy isotopes with Z = 120–126." Modern Physics Letters A 36, no. 06 (2021): 2150033. http://dx.doi.org/10.1142/s0217732321500334.

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Alpha-decay half-lives of the even–even superheavy isotopes with proton numbers [Formula: see text] have been calculated within the cluster model. The alpha-daughter potential was constructed by employing the density-dependent double-folding model with a realistic nucleon–nucleon interaction whose exchange part has a finite range approximation. The half-lives were calculated using Wentzel–Kramers–Brillouin (WKB) approximation with the alpha preformation factor. The results have shown that the computed alpha-decay half-lives were in good agreement with their counterpart calculated by different

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29

Ayala, Francisco J. "The Ovary of Eve: Egg and Sperm and Preformation. Clara Pinto-Correia." Quarterly Review of Biology 74, no. 1 (1999): 58–59. http://dx.doi.org/10.1086/392954.

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30

Nick McElhinny, Stephanie A., Carey M. Snowden, Joseph McCarville, and Dale A. Ramsden. "Ku Recruits the XRCC4-Ligase IV Complex to DNA Ends." Molecular and Cellular Biology 20, no. 9 (2000): 2996–3003. http://dx.doi.org/10.1128/mcb.20.9.2996-3003.2000.

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ABSTRACT Genetic experiments have determined that Ku, XRCC4, and ligase IV are required for repair of double-strand breaks by the end-joining pathway. The last two factors form a tight complex in cells. However, ligase IV is only one of three known mammalian ligases and is intrinsically the least active in intermolecular ligation; thus, the biochemical basis for requiring this ligase has been unclear. We demonstrate here a direct physical interaction between the XRCC4-ligase IV complex and Ku. This interaction is stimulated once Ku binds to DNA ends. Since XRCC4-ligase IV alone has very low DN

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31

Sarkin, TL. "The origin and evolution of vertebrate pattern and form—a theory of vertebrate development by preformation based on the genetic molecular shape." Medical Hypotheses 21, no. 1 (1986): 1–41. http://dx.doi.org/10.1016/0306-9877(86)90061-7.

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32

Kaur, Manpreet, BirBikram Singh, and Manoj K. Sharma. "Comparative Analysis of 13,14C Induced Reactions on 232Th Target." Journal of Nuclear Physics, Material Sciences, Radiation and Applications 9, no. 1 (2021): 47–53. http://dx.doi.org/10.15415/jnp.2021.91009.

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We have investigated the pairing and magicity effect in context of a comparative study of 13,14C induced reactions on 232Th target at energies in the vicinity of Coulomb barrier. The fission distribution and related properties are explored in terms of the summed-up preformation probabilities. The barrierpenetrability is found to be higher for fragments emitted from 246Cm* formed in 14C+232Th reaction than those emitted in the fission of 245Cm*, leading to higher magnitude of cross-section for earlier case. The DCM calculated fusion-fission cross-sections using ΔR=0 fm are normalised to compare

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33

Adashev, Vladimir E., Alexei A. Kotov, and Ludmila V. Olenina. "RNA Helicase Vasa as a Multifunctional Conservative Regulator of Gametogenesis in Eukaryotes." Current Issues in Molecular Biology 45, no. 7 (2023): 5677–705. http://dx.doi.org/10.3390/cimb45070358.

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Being a conservative marker of germ cells across metazoan species, DEAD box RNA helicase Vasa (DDX4) remains the subject of worldwide investigations thanks to its multiple functional manifestations. Vasa takes part in the preformation of primordial germ cells in a group of organisms and contributes to the maintenance of germline stem cells. Vasa is an essential player in the piRNA-mediated silencing of harmful genomic elements and in the translational regulation of selected mRNAs. Vasa is the top hierarchical protein of germ granules, liquid droplet organelles that compartmentalize RNA process

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34

Jones, Cynthia S., and Maxine A. Watson. "Heteroblasty and preformation in mayapple,Podophyllum Peltatum(Berberidaceae): developmental flexibility and morphological constraint." American Journal of Botany 88, no. 8 (2001): 1340–58. http://dx.doi.org/10.2307/3558442.

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SĂNDULESCU, AUREL, RAJ K. GUPTA, WALTER GREINER, FLORIN CARSTOIU, and MIHAI HOROI. "ROLE OF CLUSTER DEFORMATIONS ON THEIR PREFORMATION PROBABILITIES IN RADIOACTIVE CLUSTER–DECAY STUDIES." International Journal of Modern Physics E 01, no. 02 (1992): 379–88. http://dx.doi.org/10.1142/s0218301392000199.

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The folded Michigan — 3–Yukawa (M3Y) potential is used for the first time for calculating the WKB penetration probabilities, with deformation effects of the emitted clusters also included for the first time. For the clusters to be spheres, our calculations of the (empirical) performation probabilities P0 show that, depending rather sensitively on the choice of nuclear potential, P0 decreases with mass Ac of the emitted cluster, as is the case for other two model calculations of Blendowske–Walliser and Malik–Gupta. The deformation effects of the emitted clusters are shown to reduce the performa

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Mittal, Rajni, Kirandeep Sandhu, and M. K. Sharma. "Role of Polar vs Non-polar Configurations in the Decay of 268Sg* Compound Nucleus Within the Skyrme Energy Density Formalism." Journal of Nuclear Physics, Material Sciences, Radiation and Applications 9, no. 1 (2021): 61–66. http://dx.doi.org/10.15415/jnp.2021.91011.

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The effect of polar and non-polar configurations is investigated in the decay of 268Sg* compound nucleus formed via spherical projectile (30Si) and prolate deformed target (238U) using the dynamical cluster decay model. The SSK and GSkI skyrme forces are used to investigate the impact of polar and nonpolar (equatorial) configurations on the preformation probability P0 and consequently on the fission cross-sections of 268Sg* nucleus. For non-polar configuration some secondary peaks corresponding to magic shells Z=28 and N=50 are observed, whose magnitude is significantly suppressed for the pola

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37

Reese, R. Scott, and Marye Anne Fox. "Spectral and cyclic voltammetric characterization of self-assembled monolayers on gold of pyrene end-labeled oligonucleotide duplexes." Canadian Journal of Chemistry 77, no. 5-6 (1999): 1077–84. http://dx.doi.org/10.1139/v99-098.

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Self-assembled monolayers of sulfur-terminated oligonucleotide duplexes were formed on flat gold surfaces, either by exposure of a self-assembled monolayer bearing one oligonucleotide strand to the complementary strand or by preformation of a oligonucleotide duplex that was then deposited on a fresh gold surface. Virtually identical spectral behavior was observed whether the duplex was produced before deposition or by in situ complementary association. With a duplex bearing an appropriate pyrene end-label, the resulting thin film was photoresponsive. Surface emission measurements show no evide

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Worley, Anne C., and Lawrence D. Harder. "Consequences of preformation for dynamic resource allocation by a carnivorous herb, Pinguicula vulgaris (Lentibulariaceae)." American Journal of Botany 86, no. 8 (1999): 1136–45. http://dx.doi.org/10.2307/2656977.

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Kovács, József, Ferenc Joó, and Carl D. Frohning. "Anion effects in the formation of the active catalyst in the Ruhrchemie Rhône-Poulenc aqueous biphasic hydroformylation process. Are there any?" Canadian Journal of Chemistry 83, no. 6-7 (2005): 1033–36. http://dx.doi.org/10.1139/v05-088.

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The water soluble [Rh(OAc)(CO)(mtppms)2] containing monosulfonated triphenylphosphine ligands was prepared for the first time and its hydrogenation was studied in aqueous solutions. In the presence of additional mtppms, the reaction yielded [RhH(CO)(mtppms)3], a close analogue of [RhH(CO)(mtppts)3], the immediate catalyst precursor in the Ruhrchemie Rhône-Poulenc aqueous biphasic hydroformylation process. The extent of the [Rh(OAc)(CO)(mtppms)2] → [RhH(CO)(mtppms)3] transformation strongly depended on the solution pH, similar to the case of the hydrogenation of [RhCl(CO)(mtppms)2] studied ea

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40

Sarkar, Gayatri, Moumita Maiti, Amandeep Kaur, and Manoj K. Sharma. "Decay Analysis of 197Tl* Compound Nucleus Formed in 16O + 181Ta Reaction at above Barrier Energy Ec.m.~100 MeV." Journal of Nuclear Physics, Material Sciences, Radiation and Applications 9, no. 1 (2021): 103–7. http://dx.doi.org/10.15415/jnp.2021.91017.

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The decay dynamics of 197Tl* compound nucleus has been studied within the framework of the dynamical cluster-decay model (DCM) at above barrier energy Ec.m. ≈ 100 MeV using quadrupole deformed configuration of decay fragments. The influence of various nuclear radius parameters on the decay path and mass distributions has been investigated by analysing the fragmentation potential and preformation probability. It is observed that 197Tl* nucleus exhibits the triple-humped mass distribution, independent of nuclear radius choice. The most preferred fission fragments of both fission modes (symmetric

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Kaur, Amandeep, and Manoj K. Sharma. "Fission decay modes of ²⁵⁴Fm* compound nucleus formed in ¹⁶O+²³⁸U reaction." EPJ Web of Conferences 290 (2023): 02011. http://dx.doi.org/10.1051/epjconf/202329002011.

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The quantum mechanical fragmentation theory (QMFT) based dynamical cluster-decay model (DCM) is applied to analyze the probable fission decay modes of 254Fm* compound nucleus produced in 16O+238U nuclear reaction at excitation energy EC*N =45.9 MeV. The fission valley of collective fragmentation potential and the multi-humped peaks of preformation probability P0 profile are analyzed by considering compact as well as elongated configurations of quadrupole (β2) deformed fragments. The competitive emergence of different symmetric [symmetric superlong (SL), symmetric supershort (SS)] and asymmetri

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42

KANWAR, SHEFALI, MANOJ K. SHARMA, BIRBIKRAM SINGH, RAJ K. GUPTA, and WALTER GREINER. "DECAY OF 202Pb* FORMED IN 48Ca+154Sm REACTION USING THE DYNAMICAL CLUSTER-DECAY MODEL." International Journal of Modern Physics E 18, no. 07 (2009): 1453–67. http://dx.doi.org/10.1142/s0218301309013725.

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The decay of compound nucleus 202 Pb *, formed in entrance channel reaction 48 Ca +154 Sm at different incident energies, is studied by using the dynamical cluster-decay model (DCM) where all decay products are calculated as emissions of preformed clusters through the interaction barriers. The calculated results show an excellent agreement with experimental data for the fusion-evaporation residue cross-section σ ER together with the fusion-fission cross-section σ FF (taken as a sum of the energetically favored symmetric [Formula: see text] and near symmetric A=65–75 plus complementary fragment

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43

Díaz, Alexis, Pamela Ayala, Elizabeth Valdiviezo, et al. "Molt patterns and age and sex determination criteria for selected landbirds in an urban area of the Peruvian Central Coast." Caldasia 44, no. 1 (2022): 165–77. http://dx.doi.org/10.15446/caldasia.v44n1.84650.

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Despite molting is an important and expensive activity in the life cycle of birds, this process is poorly known for neotropical species and even less so for species inhabiting urban zones. We studied molt patterns, aging and sexing criteria, and morphometrics for seven common resident species in an urban area of Lima city, Peru. All species evidenced complete prebasic molts. Partial to eccentric incomplete preformative molts were evidenced for six species (Camptostoma obsoletum, Pyrocephalus rubinus, Catamenia analis, Poospiza hispaniolensis, Coereba flaveola, and Thraupis episcopus); wherea

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Witt, Elke. "Form – A Matter of Generation: The Relation of Generation, Form, and Function in the Epigenetic Theory of Caspar F. Wolff." Science in Context 21, no. 4 (2008): 649–64. http://dx.doi.org/10.1017/s0269889708001993.

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ArgumentThe question, how organisms obtain their specific complex and functional forms, was widely discussed during the eighteenth century. The theory of preformation, which was the dominant theory of generation, was challenged by different alternative epigenetic theories. By the end of the century it was the vitalist approach most famously advocated by Johann Friedrich Blumenbach that prevailed. Yet the alternative theory of generation brought forward by Caspar Friedrich Wolff was an important contribution to the treatment of this question. He turned his attention from the properties of matte

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SINGH, BIRBIKRAM, S. K. PATRA, and RAJ K. GUPTA. "IMPORTANCE OF PREFORMATION PROBABILITY IN CLUSTER RADIOACTIVE-DECAYS USING RELATIVISTIC MEAN FIELD THEORY WITHIN THE PREFORMED CLUSTER MODEL." International Journal of Modern Physics E 20, no. 04 (2011): 1003–7. http://dx.doi.org/10.1142/s0218301311019143.

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Using the preformed cluster model (PCM) of Gupta and collaborators, we have deduced empirically the preformation probability P0emp from experimental data on both the α and exotic-cluster radioactive decays in the trans-lead region having doubly magic 208 Pb or its neighboring nuclei as daughters, using the spherical and (in some cases) deformed relativistic mean field (RMF) densities. For spherical considerations, the P0α(emp) for alpha-decays is almost constant ~ 10-2 - 10-3 for all the parent nuclei studied, and P0c(emp) for cluster-decays of the same parents decrease with increasing size of

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GHALEHNO, MOHAMMAD DAHMARDEH, BABAK NOSRATI SHESHKAL, FARHAD KOOL, MIHA HUMAR, and MOHSEN BAHMANI. "CHARACTERIZATION OF ANATOMICAL, MORPHOLOGICAL, PHYSICAL AND CHEMICAL PROPERTIES OF KONAR (ZIZIPHUS SPINA-CHRISTI) WOOD." WOOD RESEARCH 66(6) 2021 66, no. 6 (2021): 912–20. http://dx.doi.org/10.37763/wr.1336-4561/66.6.912920.

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The goal of this research is to investigate some morphological (fibre length, fibre diameter, cell wall thickness, Runkel coefficient, flexibility coefficient, slenderness coefficient, rigidity coefficient, Luce's coefficient, solid coefficient), physical (dry wood density, volumetric shrinkage) and chemical (cellulose, hemicellulose, lignin, ash and acetone soluble extractives contents) composition of Konar (Ziziphus spina-christi) wood grown in Hormozgan province, Iran. For this purpose, three normal trees were selected randomly and a disk was cut from each one at breast height. Anatomical i

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Wang, Kai, Haoran Qi, Simu Ma, Linrui Wang, Naijun He, and Fuguo Li. "Effect of Nickel Addition on Solidification Microstructure and Tensile Properties of Cast 7075 Aluminum Alloy." Crystals 13, no. 11 (2023): 1589. http://dx.doi.org/10.3390/cryst13111589.

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In order to explore the casting technology of a high–strength aluminum alloy, the effects of nickel on the solidified microstructure and tensile properties of a 7075 aluminum alloy were studied. 7075 aluminum alloys without nickel and with 0.6% and 1.2% nickel were prepared by a casting method. The results showed that the increase of Ni content in the 7075 alloys increased the liquidus temperatures, primary α (Al) grains were refined significantly, and the divorced eutectic structure was gradually formed among α (Al) grains with the preformation of the Al3Ni phase. In comparison, the 7075 allo

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Inouye, David W. "LONG-TERM PREFORMATION OF LEAVES AND INFLORESCENCES BY A LONG-LIVED PERENNIAL MONOCARP, FRASERA SPECIOSA (GENTIANACEAE)." American Journal of Botany 73, no. 11 (1986): 1535–40. http://dx.doi.org/10.1002/j.1537-2197.1986.tb10903.x.

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Fouke, Daniel C. "Mechanical and “Organical” Models in Seventeenth-Century Explanations of Biological Reproduction." Science in Context 3, no. 2 (1989): 365–81. http://dx.doi.org/10.1017/s0269889700000867.

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The ArgumentThe claim that Jan Swammerdam's empirical research did not support his theory of biological preformation is shown to rest on a notion of evidence narrower than that used by many seventeenth-century natural philosophers. The principles of evidence behind the use of mechanical models are developed. It is then shown that the Cartesian theory of biological reproduction and embryology failed to gain acceptance because it did not meet the evidential requirements of these principles. The problems in this and other mechanistic theories prior to Swammerdam are found to arise from certain di

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Majekodunmi, Joshua T., K. Anwar, Shilpa Rana, et al. "Systematic Analysis for Neck-Length and Q-Values on Cluster Decay from Ba Isotopes." ECS Transactions 107, no. 1 (2022): 2893–902. http://dx.doi.org/10.1149/10701.2893ecst.

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The present study provides a detailed investigation of the neck-configuration and Q-values on the cluster decay of proton-rich even-even 124-128Ba isotopes using the relativistic mean-field (RMF) formalism with the NL3* parameter set. The densities of the interacting nuclei from the RMF approach are folded with the R3Y and M3Y interactions to obtain the nuclear potential via the double-folding technique. The preformed cluster model (PCM) based on the quantum mechanical fragmentation theory is employed for the calculation of the decay half-lives. The preformation probability P0 and the penetrat

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