114,233 research outputs found
Argyropelecus hemigymnus Cocco.
No full text40. Argyropelecus hemigymnus, Cocco. Argyropelecus hemigymnus, Cocco, Giorn. Sc. Sic. 1829, fasc. 77, p. 146.Bonaparte, Faun. Ital. Pesc.Cuv. & Val., Ilist. Nat. Poiss., XXII. p. 398. Günther, Cat. Fish. Brit. Mus., V. p. 385. Sternoptyx hemigymnus, Valenciennes, in Cuvier, Regne Animal, 111. Poiss., PI. 103, fig. 3.? Sternoptyx mediterráneo., Cocco, Giorni il Faro, 1838, IV. p. 7, fig. 2.Bonaparte, Faun. Ital. Pesc., Fig. This species was obtained at Station 315, at a depth of 225 fathoms. It was also obtained by the steamer " Fish Hawk," August 18, 1882, at Station 1112 (Lat. 39° 5(3' N., Long. 70° 35' W., 245 fathoms), and was seen by Dr. Bean on the same vessel in 18S0.Published as part of Goode, G. B. & Bean, T. H., 1883, Reports on the results of dredging under the supervision of Alexander Agassiz, on the east coast of the United States, during the summer of 1880, by the U. S. coast survey steamer " Blake, " Commander J. R. Bartlett, U. S. N., commanding., pp. 183-226 in Bulletin of the Museum of Comparative Zoology at Harvard College 10 (5) on page 220, DOI: 10.5281/zenodo.2809
Nuclear inositides: PI-PLC signaling in cell growth, differentiation and pathology
No full textThe existence of phospholipids in chromosomes has been suggested by the work of La Cour et al.
(1958). In the 1970s, Manzoli and colleagues demonstrated that addition of phospholipids to purified
nuclei could influence in vitro transcription (Manzoli et al., 1978). The same group demonstrated that
negatively charged lipids led to chromatin decondensation, while positive charged lipids had the
opposite effect. In 1987, the first demonstration came from a work by Cocco et al., that a nuclear PI
metabolism exists and it is regulated during Friend cells differentiation (Cocco et al., 1987). Since then,
progress has been made on the regulation of nuclear phosphoinositides (PI), as well as their role in
cellular functions, i.e. growth and differentiation. Nevertheless, much still needs to be understood
about the function, regulation and physical properties of this nuclear component. For example, while it
is clear that these PIs are not part of the nuclear envelope but they reside within the nuclear domains,
the physicochemical form of nuclear lipids still needs to be clarified (Irvine, 2006).
We know that inositol lipid signaling molecules are essential components of the extremely
complicated, multistep process that allows one extracellular signal to be transduced inside the cell, to
the nucleus. In the nuclear compartment, lipid second messengers elicit reactions that regulate gene
transcription, DNA replication or repair, and DNA cleavage, eventually resulting in cellular differentiation,
proliferation, apoptosis and other cell functions. Inositol-containing phospholipids are the most
intensively studied lipid second messengers. Albeit most of the research on signal transduction
pathways based on PI has been devoted to phenomena that take place at the cell periphery and plasma
membrane, it has become clear that the nuclear PI cycle is regulated in a totally independent manner
from that at the plasma membrane level. This suggests that nuclear inositol lipids themselves can
modulate nuclear processes, as important as transcription and pre-mRNA splicing, growth, proliferation,
cell cycle regulation and differentiation
High yield design of MMIC transimpedance amplifiers for multigigabit optical transmission systems
No full textIn this paper we present a design methodology for optical receivers based on transimpedance gain stage which reduces the receiver performance sensitivity to the photodiode parameter set. A transimpedance amplifier has been designed following this approach and experimental results are reported which show an improvement in the overall yield of the receiver. The design methodology proposed here has been easily implemented in a microwave simulator
Testosterone, cortisol, vitamin Dand oxidative stress and their relationships in professional soccer players
No full textBACKGROUND: The testosterone/cortisol ratio has been used in sport physiology to evaluate the balance between anabolism and catabolism; its decrease below 30% has been considered a marker of overtraining. In this framework recent studies in soccer players have investigated the relationships between testosterone, cortisol, vitamin Dand reactive oxygen species, but with unconvincing results. The aim of the present study was to evaluate the behavior of such biological parameters and their relationships both in winter (the season of championship) and in summer (off-competition season), characterized by different homeostatic situations. METHODS: Twenty-seven professional male football players (Second Italian Division), were studied. Blood levels of free testosterone, cortisol, vitamin Dand reactive oxygen species were evaluated in August (pre-season training) and in February, in the midseason. Acomparison between these two periods was performed and for each of them the relationships between the biological parameters were evaluated. RESULTS: Blood levels of testosterone were higher during summer whereas those of cortisol were higher in winter. Vitamin Dlevels were higher in summer; in this season a positive significant relationship between vitamin D and testosterone was observed (P=0.001), but not in winter (P=0.592). Reactive oxygen species were higher in winter; in this season a significant positive relationship between these substances and cortisol was observed (0.000), but not in summer (P=0.325). CONCLUSIONS: In professional soccer players it was found a positive relationship between vitamin Dand testosterone in summer and between reactive oxygen species and cortisol in winter. However, the question whether such results are genuine cause-effect relationships or mere casual or spurious statistical correlations is still unsolved. As matter of fact, such results could be dependent from other determinants which might drive the aforementioned biological parameters in the same direction. These conclusions must be considered valid only in relation to the experimental conditions (training workload, diet and sun exposure) of the present study
Experimental preventive protocols for bronj: three years of clinical experienceSalgarello S, Di Rosario F, Stranieri F, Cocco V, Dalessandri D, Paganelli C
No full textInfluence of dipping time on cracking during bending of hot dip galvanized coatings with Sn and Ti contents
No full textIn the last years, the attention to environmental topics led a new approach solution in classical protection techniques, introducing innovative way oriented to optimize different coating properties. Hot-dip galvanizing is a classical process aimed to generate coatings on iron-based surfaces, used unchanged since 200 years: some chemical elements are added in the bath with different aims (e.g., Pb is really important for its
fluidizing properties, sometimes replaced by Sn) but sometimes these elements are dangerous for human health (e.g . . .. Pb!).
In this work, the influence of dipping time and coatings chemical compositions on damaging micromechanisms was investigated considering different Sn and Ti contents. Main damaging micromechanisms in hot dip zinc coated ipersandelin steel specimens were investigated by means of bending tests. Longitudinal sections of bended specimens were observed by means of a LOM (Light Optical Microscope): main damage micromechanisms were identifìed as longitudinal and radial cracks
author-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
22 Cr 5 Ni duplex and 25 Cr 7 Ni superduplex stainless steel: Hydrogen influence on fatigue crack propagation resistance
No full textDuplex stainless steels (DSS) fatigue crack propagation resistance is strongly affected by both microstructure and environment. In this work, environment influence on the fatigue crack propagation in a 22 Cr 5 Ni duplex and in a 25 Cr 7 Ni superduplex stainless steels is investigated considering three different stress ratios (R = Kmin/Kmax = 0.1, 0.5, 0.75). Tests are performed according to ASTM E 647 standard, both in air and under hydrogen charging conditions (0.1 M H2SO4 + 0.01 M KSCN aqueous solution, -0.9 V/SCE). Crack fracture surfaces are extensively analysed by means of a scanning electron microscope. Furthermore, crack paths are investigated by means of a crack profile analysis performed through a light optical microscope. Nickel coated fracture surface sections obtained for constant ΔK values are considered in order to analyse the loading (R values) and environment influence on fatigue crack paths. © 2007 Elsevier Ltd. All rights reserved
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