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Article ; Online: Growth regimes in three-dimensional phase separation of liquid-vapor systems.

Negro, G / Gonnella, G / Lamura, A / Busuioc, S / Sofonea, V

2024 Volume 109, Issue 1-2, Page(s) 15305

Abstract: The liquid-vapor phase separation is investigated via lattice Boltzmann simulations in three dimensions. After expressing length and time scales in reduced physical units, we combined data from several large simulations (on 512^{3} nodes) with different ... ...

Abstract	The liquid-vapor phase separation is investigated via lattice Boltzmann simulations in three dimensions. After expressing length and time scales in reduced physical units, we combined data from several large simulations (on 512^{3} nodes) with different values of viscosity, surface tension, and temperature, to obtain a single curve of rescaled length l[over ̂] as a function of rescaled time t[over ̂]. We find evidence of the existence of kinetic and inertial regimes with growth exponents α_{d}=1/2 and α_{i}=2/3 over several time decades, with a crossover from α_{d} to α_{i} at t[over ̂]≃1. This allows us to rule out the existence of a viscous regime with α_{v}=1 in three-dimensional liquid-vapor isothermal phase separation, differently from what happens in binary fluid mixtures. An in-depth analysis of the kinetics of the phase separation process, as well as a characterization of the morphology and the flow properties, are further presented in order to provide clues into the dynamics of the phase-separation process.
Language	English
Publishing date	2024-02-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	2844562-4
ISSN	2470-0053 ; 2470-0045
ISSN (online)	2470-0053
ISSN	2470-0045
DOI	10.1103/PhysRevE.109.015305
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Where the Great Cities Go, Do Other Cities Follow? Divergent Trajectories of LGBTQ Organizational Growth Across the United States During the AIDS Crisis.

Somashekhar, Mahesh / Negro, Giacomo

Journal of homosexuality

2023 , Page(s) 1–26

Abstract: Numerous studies examine how LGBTQ life differs between large, cosmopolitan cities like San Francisco and other, less prominent cities. Nevertheless, most of this research is done through case studies of one or a handful of LGBTQ communities, making it ... ...

Abstract	Numerous studies examine how LGBTQ life differs between large, cosmopolitan cities like San Francisco and other, less prominent cities. Nevertheless, most of this research is done through case studies of one or a handful of LGBTQ communities, making it unclear how unique the large hubs of LGBTQ life truly are. This study leverages nationally complete data from the U.S. Gayellow Pages, a historical listing of local LGBTQ organizations, to evaluate how the organizational response of LGBTQ communities to the AIDS crisis-arguably the most prolific era of organizational creation in LGBTQ history-differed between large hubs and other cities. Findings make clear the risks of generalizing about LGBTQ life from large hubs alone. Although AIDS stimulated the creation of health-related and social movement organizations in large hubs, AIDS was more strongly associated with organizational creation outside of rather than within large hubs. The types of organizations created due to AIDS tended to be more varied outside of rather than within large hubs as well. These differences highlight the value of decentering the large hubs of LGBTQ life as units of analysis in the study of sexuality and space.
Language	English
Publishing date	2023-06-15
Publishing country	United States
Document type	Journal Article
ZDB-ID	193138-6
ISSN	1540-3602 ; 0091-8369
ISSN (online)	1540-3602
ISSN	0091-8369
DOI	10.1080/00918369.2023.2221995
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Article ; Online: Phase behaviour and dynamics of three-dimensional active dumbbell systems.

Caporusso, C B / Negro, G / Suma, A / Digregorio, P / Carenza, L N / Gonnella, G / Cugliandolo, L F

Soft matter

2024 Volume 20, Issue 4, Page(s) 923–939

Abstract: We present a comprehensive numerical study of the phase behavior and dynamics of a three-dimensional active dumbbell system with attractive interactions. We demonstrate that attraction is essential for the system to exhibit nontrivial phases. We ... ...

Abstract	We present a comprehensive numerical study of the phase behavior and dynamics of a three-dimensional active dumbbell system with attractive interactions. We demonstrate that attraction is essential for the system to exhibit nontrivial phases. We construct a detailed phase diagram by exploring the effects of the system's activity, density, and attraction strength. We identify several distinct phases, including a disordered, a gel, and a completely phase-separated phase. Additionally, we discover a novel dynamical phase, that we name percolating network, which is characterized by the presence of a spanning network of connected dumbbells. In the phase-separated phase we characterize numerically and describe analytically the helical motion of the dense cluster.
Language	English
Publishing date	2024-01-24
Publishing country	England
Document type	Journal Article
ZDB-ID	2191476-X
ISSN	1744-6848 ; 1744-683X
ISSN (online)	1744-6848
ISSN	1744-683X
DOI	10.1039/d3sm01030a
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Article: Novelties in slipped capital femoral epiphysis imaging: A narrative review.

De Angelis, R / Aparisi Gomez, M P / Negro, G / Ikhlef, S / Fichera, G / Bazzocchi, A / Simoni, P

Heliyon

2024 Volume 10, Issue 7, Page(s) e28734

Abstract: Rationale and objectives: Imaging plays a key role in Slipped Capital Femoral Epiphysis diagnosis and severity assessment. In the last two decades, signs and measurements emerged in literature showed potential to help in SCFE diagnosis and tailoring ... ...

Abstract	Rationale and objectives: Imaging plays a key role in Slipped Capital Femoral Epiphysis diagnosis and severity assessment. In the last two decades, signs and measurements emerged in literature showed potential to help in SCFE diagnosis and tailoring treatment. The purpose of this review is to collect and discuss new imaging signs, measurements, and techniques according to investigations published after 2000 to improve SCFE diagnosis. Material and methods: The PubMed, Scopus, and Science Direct databases were used to search for relevant articles related to imaging in SCFE diagnosis from January 2000 to March 2023. Article selection and review was performed by two board-certified radiologists). Article quality assessment were conducted by authors using QUADAS-2 and SANRA evaluation tools. Results: The research resulted in a total of 2577 articles. After duplicates removal and abstract analysis, 28 articles were finally selected for full-text analysis. Seventeen articles were focused on Radiographs, 6 on CT, 1 on both Radiographs and CT, 4 on MRI. No study focused on ultrasound was selected. Conclusions: Use of modified Klein's line and S-sign may improve radiographs accuracy in daily routine. Lucency sign may help in early diagnosis on radiographs. Preoperative CT may be useful in planning a tailored treatment predicting SCFE severity and instability. MRI is the most accurate modality to diagnose SCFE at early stage. Nevertheless, it cannot be used to predict the risk of contralateral SCFE. Risk prediction can be assessed with radiographs, using a new rapid mOBS. Further investigation and validation of these sign is needed.
Language	English
Publishing date	2024-04-05
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2024.e28734
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Article ; Online: Topological phases and curvature-driven pattern formation in cholesteric shells.

Negro, G / Carenza, L N / Gonnella, G / Marenduzzo, D / Orlandini, E

Soft matter

2023 Volume 19, Issue 10, Page(s) 1987–2000

Abstract: We study the phase behaviour of cholesteric liquid crystal shells with different geometries. We compare the cases of tangential anchoring and no anchoring at the surface, focussing on the former case, which leads to a competition between the intrinsic ... ...

Abstract	We study the phase behaviour of cholesteric liquid crystal shells with different geometries. We compare the cases of tangential anchoring and no anchoring at the surface, focussing on the former case, which leads to a competition between the intrinsic tendency of the cholesteric to twist and the anchoring free energy which suppresses it. We then characterise the topological phases arising close to the isotropic-cholesteric transition. These typically consist of quasi-crystalline or amorphous tessellations of the surface by half-skyrmions, which are stable at lower and larger shell sizes, respectively. For ellipsoidal shells, defects in the tessellation couple to a local curvature, and according to the shell size, they either migrate to the poles or distribute uniformly on the surface. For toroidal shells, the variations in the local curvature of the surface stabilise heterogeneous phases where cholesteric or isotropic patterns coexist with hexagonal lattices of half-skyrmions.
Language	English
Publishing date	2023-03-08
Publishing country	England
Document type	Journal Article
ZDB-ID	2191476-X
ISSN	1744-6848 ; 1744-683X
ISSN (online)	1744-6848
ISSN	1744-683X
DOI	10.1039/d2sm01347a
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Article ; Online: Hydrodynamic effects on the liquid-hexatic transition of active colloids.

Negro, G / Caporusso, C B / Digregorio, P / Gonnella, G / Lamura, A / Suma, A

The European physical journal. E, Soft matter

2022 Volume 45, Issue 9, Page(s) 75

Abstract: We study numerically the role of hydrodynamics in the liquid-hexatic transition of active colloids at intermediate activity, where motility induced phase separation (MIPS) does not occur. We show that in the case of active Brownian particles (ABP), the ... ...

Abstract	We study numerically the role of hydrodynamics in the liquid-hexatic transition of active colloids at intermediate activity, where motility induced phase separation (MIPS) does not occur. We show that in the case of active Brownian particles (ABP), the critical density of the transition decreases upon increasing the particle's mass, enhancing ordering, while self-propulsion has the opposite effect in the activity regime considered. Active hydrodynamic particles (AHP), instead, undergo the liquid-hexatic transition at higher values of packing fraction [Formula: see text] than the corresponding ABP, suggesting that hydrodynamics have the net effect of disordering the system. At increasing densities, close to the hexatic-liquid transition, we found in the case of AHP the appearance of self-sustained organized motion with clusters of particles moving coherently.
MeSH term(s)	Colloids ; Hydrodynamics ; Motion
Chemical Substances	Colloids
Language	English
Publishing date	2022-09-13
Publishing country	France
Document type	Journal Article
ZDB-ID	2004003-9
ISSN	1292-895X ; 1292-8941
ISSN (online)	1292-895X
ISSN	1292-8941
DOI	10.1140/epje/s10189-022-00230-1
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Article ; Online: Cholesteric Shells: Two-Dimensional Blue Fog and Finite Quasicrystals.

Carenza, L N / Gonnella, G / Marenduzzo, D / Negro, G / Orlandini, E

Physical review letters

2022 Volume 128, Issue 2, Page(s) 27801

Abstract: We study the phase behavior of a quasi-two-dimensional cholesteric liquid crystal shell. We characterize the topological phases arising close to the isotropic-cholesteric transition and show that they differ in a fundamental way from those observed on a ... ...

Abstract	We study the phase behavior of a quasi-two-dimensional cholesteric liquid crystal shell. We characterize the topological phases arising close to the isotropic-cholesteric transition and show that they differ in a fundamental way from those observed on a flat geometry. For spherical shells, we discover two types of quasi-two-dimensional topological phases: finite quasicrystals and amorphous structures, both made up of mixtures of polygonal tessellations of half-skyrmions. These structures generically emerge instead of regular double twist lattices because of geometric frustration, which disallows a regular hexagonal tiling of curved space. For toroidal shells, the variations in the local curvature of the surface stabilizes heterogeneous phases where cholesteric patterns coexist with hexagonal lattices of half-skyrmions. Quasicrystals and amorphous and heterogeneous structures could be sought experimentally by self-assembling cholesteric shells on the surface of emulsion droplets.
Language	English
Publishing date	2022-01-28
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.128.027801
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Article ; Online: Physical habitat modeling for river macroinvertebrate communities.

Pinna, Beatrice / Laini, Alex / Negro, Giovanni / Burgazzi, Gemma / Viaroli, Pierluigi / Vezza, Paolo

Journal of environmental management

2024 Volume 358, Page(s) 120919

Abstract: Habitat models rarely consider macroinvertebrate communities as ecological targets in rivers. Available approaches mainly focus on single macroinvertebrate species, not addressing the ecological needs and functionality of the whole community. This ... ...

Abstract	Habitat models rarely consider macroinvertebrate communities as ecological targets in rivers. Available approaches mainly focus on single macroinvertebrate species, not addressing the ecological needs and functionality of the whole community. This research aimed at providing an approach to model the habitat of the macroinvertebrate communities. The study was carried out in three rivers, located in Italy and characterized by a braiding morphology, gravel riverbeds, and low flows during the summer period. The approach is based on the recently developed Flow-T index, together with a Random Forest (RF) regression, which is employed to apply the Flow-T index at the mesohabitat scale. Using different datasets gathered from field data collection and 2D hydrodynamic simulations, the model was calibrated in the Trebbia River (2019 field campaign) and validated in the Trebbia, Taro, and Enza rivers (2020 field campaign). The RF model selected 12 mesohabitat descriptors as important for the macroinvertebrate community. These descriptors belong to different frequency classes of water depth, flow velocity, substrate grain size, and connectivity to the main river channel. The cross-validation R
Language	English
Publishing date	2024-04-23
Publishing country	England
Document type	Journal Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2024.120919
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Article: The D.D.T. in its practical applications.

NEGRO, G

Giornale di batteriologia e immunologia

2010 Volume 35, Issue 2, Page(s) 179–184

Title translation	Il D.D.T. nelle sue applicazioni pratiche.
MeSH term(s)	DDT ; Ethyl Chloride
Chemical Substances	Ethyl Chloride (46U771ERWK) ; DDT (CIW5S16655)
Language	Italian
Publishing date	2010-02-28
Publishing country	Italy
Document type	Journal Article
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Article ; Online: Feeding rumen-protected methionine during the peripartum period improved milk fat content and reduced the culling rate of Holstein cows in a commercial herd.

Leão, G F M / Santos, S K / Askel, E J / Michelotti, T C A / Negro, G / Lopes, F / Luchini, D / Cardoso, F C / Almeida, R

Journal of dairy science

2024

Abstract: Researchers have reported the benefits of feeding rumen-protected methionine (RPM) during the peripartum on the health parameters of dairy cows. Rumen-protected methionine has reportedly improved milk yield, milk components and liver health, but the ... ...

Abstract	Researchers have reported the benefits of feeding rumen-protected methionine (RPM) during the peripartum on the health parameters of dairy cows. Rumen-protected methionine has reportedly improved milk yield, milk components and liver health, but the literature is scarce on its effects in commercial herds. Therefore, we aimed to determine the effects of feeding RPMet (Smartamine M®, Adisseo Inc., Antony, France) prepartum (8 g per cow per day) and postpartum (15 g per cow per day) on performance, metabolic profile, and culling rate of Holstein cows in a commercial herd. One-hundred and 66 (n = 166) Holstein cows, 58 nulliparous and 108 parous, were randomly assigned to 1 of 2 dietary treatments, consisting of TMR top-dressed with RPMet (2.35 and 2.24% Met of MP for close-up and fresh cows, respectively) or without (control, CON, (2.03 and 1.89% Met of MP for close-up and fresh cows, respectively), fed from 21 ± 6 d prepartum until 16 ± 5 d postpartum. From 17 d in milk (DIM) until dry-off, all cows received RPMet. Daily milk yield was recorded, and milk samples were collected in the first and second weeks after calving to determine their composition. Blood samples were collected before the morning feeding on -14, -7, +1, +7, and +14 d relative to calving. Mortality and morbidity were recorded during the first 60 DIM. Cows supplemented with RPMet had greater milk yield during the first 16 DIM (31.76 vs. 30.37 kg/d; SEM = 1.04, respectively), and had greater milk fat content (4.45 vs. 4.10%; SEM = 0.11, respectively), but not milk total protein (3.47 vs. 3.39%; SEM = 0.04, respectively) and casein contents (2.74 vs. 2.66%; SEM = 0.04, respectively) than CON cows. Cows in RPMet had increased plasma Met concentrations than cows in CON (24.9 vs. 21.0 µmol/L; SEM = 1.2, respectively). Although morbidity was similar between treatments, the culling rate from calving until 60 DIM was lower for RPMet cows than for CON cows (2.4 vs. 12.1%; SEM = 0.02). In conclusion, cows receiving RPMet have greater milk yield, improved milk fat content, and a lower culling rate at 60 DIM than CON cows.
Language	English
Publishing date	2024-04-24
Publishing country	United States
Document type	Journal Article
ZDB-ID	242499-x
ISSN	1525-3198 ; 0022-0302
ISSN (online)	1525-3198
ISSN	0022-0302
DOI	10.3168/jds.2024-24636
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