Kinematics of a relativistic particle with de Sitter momentum space

We discuss kinematical properties of a free relativistic particle with deformed phase space in which momentum space is given by (a submanifold of) de Sitter space. We provide a detailed derivation of the action, Hamiltonian structure and equations of motion for such free particle. We study the action of deformed relativistic symmetries on the phase space and derive explicit formulas for the action of the deformed Poincare' group. Finally we provide a discussion on parametrization of the particle worldlines stressing analogies and differences with ordinary relativistic kinematics.Comment: RevTeX, 12 pages, no figure

Relative-locality distant observers and the phenomenology of momentum-space geometry

We study the translational invariance of the relative-locality framework proposed in arXiv:1101.0931, which had been previously established only for the case of a single interaction. We provide an explicit example of boundary conditions at endpoints of worldlines, which indeed ensures the desired translational invariance for processes involving several interactions, even when some of the interactions are causally connected (particle exchange). We illustrate the properties of the associated relativistic description of distant observers within the example of a $\kappa$-Poincar\'e-inspired momentum-space geometry, with de Sitter metric and parallel transport governed by a non-metric and torsionful connection. We find that in such a theory simultaneously-emitted massless particles do not reach simultaneously a distant detector, as expected in light of the findings of arXiv:1103.5626 on the implications of non-metric connections. We also show that the theory admits a free-particle limit, where the relative-locality results of arXiv:1102.4637 are reproduced. We establish that the torsion of the $\kappa$-Poincar\'e connection introduces a small (but observably-large) dependence of the time of detection, for simultaneously-emitted particles, on some properties of the interactions producing the particles at the source.Comment: 45 pages, 10 figure

Considerationi Di Monsig. Michele Mercati Sopra Gli Avvertimenti Del Sig. Latino Latini : Intorno Ad Alcvne cose scritte nel libro de gli Obelischi di Roma ; Insieme con alcuni sopplimenti al medesimo libro

CONSIDERATIONI DI MONSIG. MICHELE MERCATI SOPRA GLI AVVERTIMENTI DEL SIG. LATINO LATINI : INTORNO AD ALCVNE COSE SCRITTE NEL LIBRO DE GLI OBELISCHI DI ROMA ; INSIEME CON ALCUNI SOPPLIMENTI AL MEDESIMO LIBRO Considerationi Di Monsig. Michele Mercati Sopra Gli Avvertimenti Del Sig. Latino Latini : Intorno Ad Alcvne cose scritte nel libro de gli Obelischi di Roma ; Insieme con alcuni sopplimenti al medesimo libro (1) Fotodokumentation (-) Titelblatt (1) Considerationi Di Monsig. Michele Mercati. Al Sig. Latino Latini (3) Nomi De Gli Autori (6) Le Cose Piu Notabili (7) Avvertimento Primo. Del Sig. Latino Latini (9) Prima consideratione Sopra il primo avvertimento (10) Avvertimento Secondo. Del Sig. Latino Latini (47) Seconda consideratione Sopra il secondo avvertimento (48) Avvertimento Terzo. Del Sig. Latino Latini (56) Terza consideratione Sopra il terzo avvertimento (57) Avvertimento Quarto. Del Sig. Latino Latini (69) Quarta consideratione Sopra il Quarto Avvertimento (70) Avvertimento Quinto. Del Sig. Latino Latini (74) Quinta consideratione Sopra il quinto avvertimento (75) Avvertimento Sesto. Del Sig. Latino Latini (112) Sesta consideratione sopra il sesto avvertimento (113) Avvertimento Settimo. Del Sig. Latino Latini (115) Settima consideratione Sopra il settimo avvertimento (116) Alcuni Sopplimenti al libro de gli Obelischi (117

De Gli Obelischi Di Roma / Di Monsig. Michele Mercati Protonot. Apostolico

DE GLI OBELISCHI DI ROMA / DI MONSIG. MICHELE MERCATI PROTONOT. APOSTOLICO De Gli Obelischi Di Roma / Di Monsig. Michele Mercati Protonot. Apostolico (1) Einband (1) Titelseite (3) Titelblatt (8) Beatissimo Padre (10) Beiträge (14) Tavola Dei Capito (21) Nomi De Gli Autori citati nella presente opera (23) Capitolo I.-X. (24) Capitolo XI.-XIV. (105) Capitolo XV.-XXII. (186) Capitolo XXIII.-XXXII. (250) Capitolo XXXIII.-XXXV. (315) Capitolo XXXVI.-XLIII. (363) Tavola Universale De Gli Obelischi Di Roma (416) Tavola Per Alfabeto (424

De gli obelischi di Roma

Sign.: *\p4\s, 2*\p6\s, A-Z\p4\s, 2A-2Z\p4\s, 3A-3I\p4\sPort. con grab. calc., escudo pontifici

Transcriptome analysis and codominant markers development in caper, a drought tolerant orphan crop with medicinal value

Caper (Capparis spinosa L.) is a xerophytic shrub cultivated for its fower buds and fruits, used as food and for their medicinal properties. Breeding programs and even proper taxonomic classifcation of the genus Capparis has been hampered so far by the lack of reliable genetic information and molecular markers. Here, we present the frst genomic resource for C. spinosa, generated by transcriptomic approach and de novo assembly. The sequencing efort produced nearly 80million clean reads assembled into 124,723 unitranscripts. Careful annotation and comparison with public databases revealed homologs to genes with a key role in important metabolic pathways linked to abiotic stress tolerance and bio-compounds production, such purine, thiamine and phenylpropanoid biosynthesis, α-linolenic acid and lipid metabolism. Additionally, a panel of genes involved in stomatal development/ distribution and encoding for Stress Associated Proteins (SAPs) was also identifed. We also used the transcriptomic data to uncover novel molecular markers for caper. Out of 50 SSRs tested, 14 proved polymorphic and represent the frst set of SSR markers for the genus Capparis. This transcriptome will be an important contribution to future studies and breeding programs for this orphan crop, aiding to the development of improved varieties to sustain agriculture in arid conditions

Agronomic Evaluation and Genetic Characterization of Different Accessions in Lentil (Lens culinaris Medik.)

Lentil is an important winter-sown legume for semi-arid and temperate areas, food consumption of seed is considerable in several countries of Mediterranean Basin. In Central and Southern Italy different lentil landraces are cultivated within specific marginal areas and commercialized with a recognizable geographical indication of origin. Considering the extensive germplasm and the economic importance of lentil in several rural areas, detailed knowledge of existing genetic variation from different regions is the first important step both for conservation and exploitation of genetic resources, allowing to develop breeding programs. In field experiments over three cropping seasons (2002-2005), 25 lentil accessions from Plant Genetic Institute of National Research Council (Bari), representing part of a large germplasm collection from different areas, were carried out at the University of Reggio Calabria in order to characterize the agronomic performances in a semi-arid environment and to study genetic variability. For this purpose, 10 AFLP primer combinations and 6 SSR markers were used. The agronomic results highlighted the influence of different climatic conditions on phenological, biometrical and yielding traits. A considerable production level of lentil (2,55 t ha-1) and a low yield variability in the three years was observed, showing the high adaptability of the germplasm tested to semi-arid environment. The earliness and the plant height appeared as the most important traits negatively correlated to grain yield; in particular the earliness was confirmed as suitable mechanism of escape from abiotic stress. Genetic characterization showed that a few number of microsatellites and primer combinations are able to provide significant insights on genetic diversity combining the 25 accessions in 3 large clusters that mainly mirror their geographic origin. Principal Component Analysis that consider genetic as well as morphological and agronomic data allowed the discrimination of groups with higher similarity and the Laird variety was far from all the other accessions. The macrosperma accession MG 106401 from Algeria results the closest to Laird because of their late-flowering. The fingerprinting of these elite genotypes and the evaluated suitability of agronomic traits could usefully represent strategic tools for new targeted lentil breeding programs in Mediterranean area

The sperm of Matsucoccus feytaudi (Insecta, Coccoidea): Can the microtubular bundle be considered as a true flagellum?

In the present work the spermiogenesis and sperm structure of Matsucoccus feytaudi, a primary pest of the maritime pine in southern eastern Europe, is studied. In addition to the already known characteristics of coccid sperm, such as the absence of the acrosome and mitochondria, and the presence of a bundle of microtubules responsible for sperm motility, a peculiar structure from which the microtubule bundle takes origin is described. Such a structure - a short cylinder provided with a central hub surrounded by several microtubules with a dense wall - is regarded as a Microtubule Organizing Centre (MTOC). During spermiogenesis, quartets of fused spermatids are formed; from each spermatid, a bundle of microtubules, generated by the MTOC, projects from the cell surface. Each cell has two centrioles, suggesting the lack of a meiotic process and the occurrence of parthenogenesis. At the end of the spermiogenesis, when the cysts containing bundles of sperm are formed, part of the nuclear material together with the MTOC structure is eliminated. Based on the origin of the microtubular bundle from the MTOC, the nature of the bundle as a flagellum is discussed

The Apelinergic System Immuno-Detection in the Abomasum and Duodenum of Sheep Grazing on Semi-Natural Pasture

Apelin (APLN) is an adipokine mainly produced by adipose tissue and related to an individual’s nutritional status as well as digestive apparatus functions. In this work, APLN and its receptor (APLNR) were investigated, by immunohistochemistry, in the abomasum and duodenum of 15 Comisana × Appenninica adult sheep reared in a semi-natural pasture. Organ samples were collected after maximum pasture flowering (M × F group) and after maximum pasture dryness (M × D group); the experimental group (E × p group) received a feed supplementation of 600 grams/day/head of barley and corn in addition to M × D group feeding. APLN and APLNR were identified in the lining epithelium and the fundic gland chief cells of the abomasum. APLNR was observed in the lining epithelium, in the crypts and the serotonin secreting cells of the duodenum. Similar reactivity was observed between the M × F and E × p groups, while the M × D group showed a lower intensity of immunostaining for both APLN and APLNR in all positive structures but the duodenal serotonin neuroendocrine cells. Hence, our findings show that the E × p group presents a picture quite overlapped with M × F and suggest that food supplementation has a maintaining effect on the apelinergic system expression in the investigated digestive tracts of the sheep

Different Cell Types Affect the Transition from Juvenile to Mature Phase in Citrus Plants Regenerated through Somatic Embryogenesis

Robust protocols for the regeneration of somatic embryos in vitro are essential for the efficient use of the most modern biotechnologies. Unfortunately, in perennial trees such as Citrus, plants regenerated from juvenile tissues usually exhibit strong, undesirable juvenile characters such as thorny habit and delayed flowering and fruit production. In this work, we tested whether the cell types (nucellar and stigma/style) used to regenerate Citrus plants through somatic embryogenesis affected the transition from the juvenile to mature phase. The results show that regenerants from nucellar cells presented persistent juvenile characters, whereas plants originating from stigma/style explants transited to the mature phase more rapidly. Our observations support the hypothesis that the totipotent cells originated from different cell types are not equivalent, possibly by maintaining memory of their previously differentiated state