187,527 research outputs found
Experimental tests about the cooling/freezing of the molten salts in the receiver tubes of a solar power plant with parabolic trough
No full textIn 2003 ENEA realized the PCS experimental Facility at Casaccia Research Centre (Rome, Italy), in order to test in real operating conditions the components of a parabolic trough solar plant, and to evaluate the technical feasibility of using the solar molten salts mixture (60% NaNO3, 40% KNO3, melting point 220÷240°C) in such a type of plant. ENEA also had the need to assess the behaviour of the solar receiver tubes during abnormal operating situations (wrong operation, pump block, power failure, etc.), when a block of the circulation of the molten salts may occur and cause the cooling or, worse, the freezing of the salts mixture inside the pipes. Some experimental tests have been performed, aimed to examine what happens in such a cases. In fact, without quick maneuvers to restart the circulation of the molten salts or to readily empty the receiver tubes, the molten salts contained in them may cool down to temperatures near/below the solidification. In this report are shown the results of the experimental tests carried out on the receiver tubes of the PCS Facility by cooling the process fluid down to temperatures near or below its freezing point. The tests show that the solidification of the salts does not damage the components of the plant but it is manageable and reversible, provided you apply the correct procedures. © 2017 Author(s)
Maladera gansuensis Fabrizi & Liu & Bai & Yang & Ahrens 2021
No full text<i>Maladera gansuensis</i> (Miyake & Yamaya, 2001) group <p> <b> Key to species of the <i>Maladera gansuensis</i> (Miyake & Yamaya, 2001) group (³³):</b> </p> <p> 1 Body more robust and convex, elytral humeri reduced.............. <i>Maladera shaluishanica</i> Ahrens, Fabrizi & Liu, sp. n.</p> <p>1’ Body elongate, elytral humeri not reduced.................................................................. 2</p> <p> 2 Dorsal distal apophysis of phallobase with a fine suture at base. Aedeagus narrow and fine..................................................................................... <i>Maladera houzhenziensis</i> Ahrens, Fabrizi & Liu, sp. n.</p> <p>2’ Dorsal distal apophysis of phallobase without a suture at base. Aedeagus robust.................................... 3</p> <p>3 Right paramere on dorsomedian margin with a large blunt extension at basal third (lateral view)....................... 4</p> <p> 3’ Right paramere on dorsomedian margin with a small blunt extension at basal third (lateral view)............................................................................... <i>Maladera hongyuanensis</i> Ahrens, Fabrizi & Liu, sp. n.</p> <p> 4 Frons with long and dense setae on disc. Phallobase before dorsal distal apophysis weakly emarginate laterally. Right paramere bent at middle (lateral view).......................................... <i>Maladera yangi</i> Ahrens, Fabrizi & Liu, sp. n.</p> <p> 4’ Frons without setae on disc. Phallobase before dorsal distal apophysis distinctly emarginate laterally. Right paramere straight, with ventral margin (lateral view) more or less straight.................. <i>Maladera gansuensis</i> (Miyake & Yamaya, 2001)</p>Published as part of <i>Fabrizi, Silvia, Liu, Wan-Gang, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2021, A monograph of the genus Maladera Mulsant & Rey, 1871 of China (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), pp. 1-400 in Zootaxa 4922 (1)</i> on page 214, DOI: 10.11646/zootaxa.4922.1.1, <a href="http://zenodo.org/record/4496316">http://zenodo.org/record/4496316</a>
Maladera pseudohongkongica Ahrens & Fabrizi 2016
No full text<i>Maladera pseudohongkongica</i> Ahrens & Fabrizi, 2016 <p>Figures 16 A–E, 93</p> <p> <i>Maladera pseudohongkongica</i> Ahrens & Fabrizi, 2016: 242.</p> <p> <b>Additional material examined.</b> <b>China:</b> 1 ♂ “ Yunnan 1500-2500m 25.22N 98.49E 17-24/5 Gaoligong mts. Vit Kuban leg. 1995” (CP), 1 ♂, 1 ♀ “ China: Yunnan province, Mazhan env., 6.VI.2007 Volcano Geological Park, 25°13.5N 098°30.0‘E, 1930m, J. Hajek & J. Ruzicka leg.” (NMPC), 2 ♂♂ “ China: Yunnan Prov. Tongbiguan vill., 24.-26.vi.2016 24°36.7’N, 97°39.4’E, 1340 m at light in village near river J. Hajek & J. Ruzicka leg.” (NMPC), 1 ♂ “ Mengzi, Southeast of Yunnan, 2.VI.1956, 1350m, leg. Panfilov / Maladera sp133” (IZAS), 1 ♂ “ Mengzi, Southeast of Yunnan, 2.VI.1956, 1350m, leg. Panfilov / LW-918” (IZAS), 1 ♂ “ China, SE-Yunnan Xichou—E env. 1400- 1700m, 13.-18.5.95 25°22-26’/ 104°41-49’ L.+ R. Businsky lgt./ 1037 Sericini Asia spec.” (CP). <b>Thailand:</b> 1 ♂ “N- Thailand 1.-17.VII.1990 Doi Inthanon lg. Malicky” (ZSM), 1 ♂ “ Thai 28-31/5 1995 19.27N 98.20E Soppong 1500 m Vit Kuban leg.” (CP). <b>Myanmar:</b> 2 ex. “ Burma (Myanmar) SW Shan state Taunggyi J. Rejsek 1.- 18.6.1997 ” (ZFMK).</p> <p> <b>Distribution.</b> See map (Fig. 93) and Table 1.</p>Published as part of <i>Fabrizi, Silvia, Liu, Wan-Gang, Bai, Ming, Yang, Xing-Ke & Ahrens, Dirk, 2021, A monograph of the genus Maladera Mulsant & Rey, 1871 of China (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), pp. 1-400 in Zootaxa 4922 (1)</i> on page 79, DOI: 10.11646/zootaxa.4922.1.1, <a href="http://zenodo.org/record/4496316">http://zenodo.org/record/4496316</a>
La disfunzione erettile. In Simonelli C., Fabrizi A., Rossi R., Tripodi F (a cura di) Sessuologia clinica. Diagnosi, trattamento e linee guida internazionali,
No full textGli script sociali nella cultura occidentale definiscono la sessualità maschile come “attiva, caratterizzata da un costante ed elevato desiderio sessuale, e orientata alla prestazione”, attribuendo così un ruolo centrale all’erezione [1,2]. La mascolinità è definita attraverso attributi come la forza fisica, l’eterosessualità, il potere sulle donne e sugli altri uomini, il non comunicare alcune emozioni (come rimorso e in-certezza, che possono far pensare alla vulnerabilità), l’indipendenza economica e l’abilità nella conquista sessuale. In un tale quadro culturale, la difficoltà a ottenere o mantenere l’erezione può rappresentare una forte fonte di disagio per l’uomo e lo stesso timore riguardo le fu-ture performance può divenire un fattore di rischio per la disfunzione erettile e il benessere sessuale in generale.
La salute sessuale è un concetto articolato, influenzato da fattori biologici, psicologici e relazionali [3-5] in cui le dimensioni socioculturali modulano l’espressione sessuale in entrambi i generi [6]. Anche le esperienze passate, sia nella famiglia d’origine sia con il gruppo dei pari e più in generale nelle istituzioni e nel contesto sociale allargato (religione, scuola, insegnanti, mass-media), esercitano un’influenza importante nello sviluppo individuale e incidono profondamente sulla modalità in cui ci si rappresenta e si vive l’affetto e l’amore. Sempre più chiaramente si osserva come i fattori psicologici e interpersonali hanno un ruolo importante nell’eziologia e nel mantenimento dei problemi sessuali
Author Correction:EEG, behavioural and physiological recordings following a painful procedure in human neonates
No full textCorrection to: Scientific Data, published online 13 November 2018 The original corresponding author of the work, Dr Laura Jones, has left UCL is no longer able to respond to correspondence relating to this paper. Please contact Dr Lorenzo Fabrizi ([email protected]) for any queries, including requests for data access, rather than the listed corresponding author in the paper.</p
Maladera pseudohongkongica Ahrens & Fabrizi 2016
No full textMaladera pseudohongkongica Ahrens & Fabrizi, 2016 Additional material examined. 1 ♂ “ India: Jharkhand, West Singbhum, Kamdeyong Nursery, Porahat, 22.770744 N, 85.373445 E, 15.vii.2021, leg. P. Das ” (NZSI). Remarks. This is the first state record for Jharkhand state of India (Fig. 9). So far the species is known only from NE India (Arunachal Pradesh, Meghalaya, Assam), Bangladesh, Myanmar, China (Yunnan), and Thailand (Ahrens & Fabrizi 2016; Fabrizi et al. 2021).Published as part of Bhunia, Debika, Gupta, Devanshu, Chandra, Kailash & Ahrens, Dirk, 2022, New species and records of Sericini of India (Coleoptera: Scarabaeidae: Melolonthinae) III, pp. 489-494 in Zootaxa 5200 (2) on page 493, DOI: 10.11646/zootaxa.5200.5.6, http://zenodo.org/record/727100
Figure 3 from: Liu W-G, Fabrizi S, Yang X, Bai M, Ahrens D (2017) New species of Nipponoserica and Paraserica from China (Coleoptera, Scarabaeidae, Sericini). ZooKeys 721: 65-91. https://doi.org/10.3897/zookeys.721.13918
No full textFigure 3 A–D Paraserica camillerii Ahrens, Fabrizi, & Liu, sp. n. (holotype) E–H P. mupuensis Ahrens, Fabrizi, & Liu, sp. n. (holotype) I–L N. wangi Ahrens, Fabrizi, & Liu, sp. n. (holotype) A, E, I aedeagus, left side lateral view C, G, K aedeagus, right side lateral view B, F, J parameres, dorsal view D, H, L habitus. Scale bar 0.5 mm. Habitus not to scale
Emphania lacroixi Ahrens & Fabrizi 2008, n. sp.
No full text<i>Emphania lacroixi</i> n. sp. <p>TYPE MATERIAL. — Holotype: ♂ “ Madagascar (Sud, forêts Nord Ft. Dauphin Allaud 1900/16/Muséum Paris” (MNHN).</p> <p>Paratypes: 2 ♂♂ “ Madagascar (Sud, forêts Nord Ft. Dauphin Allaud 1900/ Muséum Paris ” (MNHN, coll. DA); 1 ♀ “ Madagascar Fénerive E. Perrot ” (MNHN).</p> <p>ETYMOLOGY. — This new species is dedicated to Marc Lacroix (Paris) for his merits in study of melolonthine chafer beetles of Madagascar.</p> <p>DESCRIPTION OF HOLOTYPE</p> <p> Length: 8.2 mm; length of elytra: 5.9 mm; width: 4.2 mm. Body surface brown with greenish shine. Head and antenna as in <i>E. metallica</i>; eyes small, ratio of diameter/interocular width: 0.58. Antennomeres 3-5 not fused; club a little longer than the remaining antennomeres combined. Pronotum and scutellum as in <i>E. metallica</i>, except the basal marginal line of pronotum being more distinct and widely interrupted medially and its surface bearing a single long seta on the center of each pronotal half. Elytra as in <i>E. metallica</i>. Metacoxa and pygidium as in <i>E. metallica</i>. Ratio of length of metepisternum/ metacoxa: 1/1.89. Legs as in <i>E. metallica</i>; ratio of metatibial width/length: 1/4.17, medial face of metatibia with one or two punctures beside the dorsal margin.</p> <p>Aedeagus: Figure 1 E-G.</p> <p>VARIATION</p> <p>Length: 8.2-9.9 mm; length of elytra: 5.9-6.2 mm; width: 4.2-5.3 mm. The colour varies from blackish green to reddish purple. The female has the antennal club slightly shorter and the punctures on pygidium are very indistinct.</p> <p> REMARKS The species is very similar in external morphology to <i>E. metallica</i> and may externally only be distinguished by the unfused antennomeres 3-5. The shape of parameres provides more confidence for separating both taxa; parameres are longer in <i>E. lacroixi</i> n. sp. with a widely curved apical hook.</p>Published as part of <i>Ahrens, Dirk & Fabrizi, Silvia, 2008, A taxonomic revision of the Malagasy genus Emphania Erichson, 1847 (Insecta, Coleoptera, Scarabaeidae, Sericini), pp. 917-927 in Zoosystema 30 (4)</i> on page 922, DOI: <a href="http://zenodo.org/record/4525859">10.5281/zenodo.4525859</a>
Meta-analysis of observational studies: Hepatitis C and survival after renal transplant
No full textRecent evidence has shown that anti-HCV-positive serologic status is significantly linked to lower patient and graft survival after renal transplant, but conflicting results have been given on this point. The aim of this study was to conduct a systematic review of the published medical literature concerning the impact of HCV infection on all-cause mortality and graft loss after RT. The relative risk of all-cause mortality and graft loss was regarded as the most reliable outcome end-point. Study-specific relative risks were weighted by the inverse of their variance to obtain fixed- and random-effect pooled estimates for mortality and graft loss with HCV across the published studies. We identified eighteen observational studies involving 133 530 unique renal transplant recipients. The summary estimate for adjusted relative risk (aRR) of all-cause mortality was 1.85 with a 95% confidence interval (CI) of 1.49; 2.31 (P < 0.0001); heterogeneity statistics, Ri = 0.87 (P-value by Q-test = 0.001). The overall estimate for adjusted RR of all-cause graft loss was 1.76 (95% CI, 1.46; 2.11) (P < 0.0001), heterogeneity statistics, Ri = 0.65 (P-value by Q-test = 0.001). Stratified analysis did not change meaningfully these results. Meta-regression showed that living donor rate had a favourable influence on patient (P = 0.031) and graft survival (P = 0.01), whilst diabetes mellitus having a detrimental role on patient survival (P = 0.001). This meta-analysis of observational studies supports the notion that HCV-positive patients after RT have an increased risk of mortality and graft loss. Further studies are in progress to understand better the mechanisms underlying the relationship between HCV and mortality or graft dysfunction after renal transplant
Recent advances in the management of hepato-renal syndrome (HRS)
No full textHepato-renal syndrome (HRS) is a functional renal failure complicating end-stage liver disease, HRS is characterized by marked arterial vasodilation (mainly of the splanchnic bed) and severe renal vasoconstriction. HRS is classified into 2 types: type I HRS shows a rapid and progressive decline in renal function with a very poor prognosis (median survival of about 2 weeks); HRS type 2 has a more stable renal failure, With a median survival of about 6 months. The management of HRS is still a big challenge. The definitive therapy for HRS is liver transplantation (LT); however, the survival rate of HRS patients is poor, and important organ shortage exists. Various approaches have been used for HRS treatment including vasoconstrictor therapy. Recent evidence has shown that vasoconstrictor agents are effective and serve as a bridge to LT, the rationale for vasoconstrictors is to counteract the splanchnic arterial vasodilation and increase the effective arterial blood volume. Thus, renal perfusion and glomerular filtration rates improve. Terlipressin, a V1 vasopressin agonist, has been used frequently. A recent meta-analysis of clinical trials showed that the pooled rate of patients who reversed HRS after terlipressin therapy was 0.52 (95% CI, 0.42; 0.61; P=0.0001, I-2=24.6%). The pooled Odds Ratio (OR) for mortality rate in HRS patients who were not responders to terlipressin versus responders was 5.746 (95% CI, 1.5; 21.9; P=0.0005). Prospective, controlled clinical trials are in progress to address the impact of vasoconstrictor use on survival in HRS patients. Alternative therapies such as transjugular intrahepatic portosystemic shunts (TIPS) and extracorporeal albumin dialysis (ECAD) have given encouraging results but experience is extremely limited
- …
