3,816 results on '"Macchia, A."'
Search Results
2. pH-conditioning of recognition layers enables single-molecule affinity detections at 10E-20 molar
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Macchia, Eleonora, Di Franco, Cinzia, Scandurra, Cecilia, Sarcina, Lucia, Piscitelli, Matteo, Catacchio, Michele, Caputo, Mariapia, Bollella, Paolo, Scamarcio, Gaetano, and Torsi, Luisa
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Physics - Applied Physics - Abstract
While nucleic-acids can be readily amplified for single-marker detection, a comparable method for proteins assay is currently unavailable. Proteins potentiometric detections at 10-20 molar have been demonstrated, but the mechanism remains elusive. Here, we unveil how pH-conditioning within the trillions of recognition elements densely packed on a millimeter-large surface, enables single protein or DNA selective detections in 0.1 mL of a biofluid. Plasmonic, electronic and surface probing techniques demonstrate that a conformational change, elicited by a single-affinity binding, alters the secondary and tertiary structure of the recognition elements. A phenomenological mechanism foresees that the pH-conditioning initiates a hydrophobization process leading to the formation of a partially aggregated and metastable state that facilitates the amplification spreading. Impact on protein aggregates control and biomarker-based diagnostics, is envisaged.
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- 2024
3. A synthesis of evidence for policy from behavioural science during COVID-19.
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Ruggeri, Kai, Stock, Friederike, Haslam, S, Capraro, Valerio, Boggio, Paulo, Ellemers, Naomi, Cichocka, Aleksandra, Douglas, Karen, Rand, David, van der Linden, Sander, Cikara, Mina, Finkel, Eli, Druckman, James, Wohl, Michael, Petty, Richard, Tucker, Joshua, Shariff, Azim, Gelfand, Michele, Packer, Dominic, Jetten, Jolanda, Van Lange, Paul, Pennycook, Gordon, Peters, Ellen, Baicker, Katherine, Crum, Alia, Weeden, Kim, Napper, Lucy, Tabri, Nassim, Zaki, Jamil, Skitka, Linda, Kitayama, Shinobu, Mobbs, Dean, Sunstein, Cass, Ashcroft-Jones, Sarah, Todsen, Anna, Hajian, Ali, Verra, Sanne, Buehler, Vanessa, Friedemann, Maja, Hecht, Marlene, Mobarak, Rayyan, Karakasheva, Ralitsa, Tünte, Markus, Yeung, Siu, Rosenbaum, R, Lep, Žan, Yamada, Yuki, Hudson, Sa-Kiera, Macchia, Lucía, Soboleva, Irina, Dimant, Eugen, Geiger, Sandra, Jarke, Hannes, Wingen, Tobias, Berkessel, Jana, Mareva, Silvana, McGill, Lucy, Papa, Francesca, Većkalov, Bojana, Afif, Zeina, Buabang, Eike, Landman, Marna, Tavera, Felice, Andrews, Jack, Bursalıoğlu, Aslı, Zupan, Zorana, Wagner, Lisa, Navajas, Joaquín, Vranka, Marek, Kasdan, David, Chen, Patricia, Hudson, Kathleen, Novak, Lindsay, Teas, Paul, Rachev, Nikolay, Galizzi, Matteo, Milkman, Katherine, Petrović, Marija, Van Bavel, Jay, and Willer, Robb
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Humans ,Behavioral Sciences ,Communication ,COVID-19 ,Culture ,Evidence-Based Practice ,Health Policy ,Leadership ,Pandemics ,Policy Making ,Public Health ,Social Norms - Abstract
Scientific evidence regularly guides policy decisions1, with behavioural science increasingly part of this process2. In April 2020, an influential paper3 proposed 19 policy recommendations (claims) detailing how evidence from behavioural science could contribute to efforts to reduce impacts and end the COVID-19 pandemic. Here we assess 747 pandemic-related research articles that empirically investigated those claims. We report the scale of evidence and whether evidence supports them to indicate applicability for policymaking. Two independent teams, involving 72 reviewers, found evidence for 18 of 19 claims, with both teams finding evidence supporting 16 (89%) of those 18 claims. The strongest evidence supported claims that anticipated culture, polarization and misinformation would be associated with policy effectiveness. Claims suggesting trusted leaders and positive social norms increased adherence to behavioural interventions also had strong empirical support, as did appealing to social consensus or bipartisan agreement. Targeted language in messaging yielded mixed effects and there were no effects for highlighting individual benefits or protecting others. No available evidence existed to assess any distinct differences in effects between using the terms physical distancing and social distancing. Analysis of 463 papers containing data showed generally large samples; 418 involved human participants with a mean of 16,848 (median of 1,699). That statistical power underscored improved suitability of behavioural science research for informing policy decisions. Furthermore, by implementing a standardized approach to evidence selection and synthesis, we amplify broader implications for advancing scientific evidence in policy formulation and prioritization.
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- 2024
4. A nanoencapsulated oral formulation of fenretinide promotes local and metastatic breast cancer dormancy in HER2/neu transgenic mice
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Maria Laura De Angelis, Federica Francescangeli, Eleonora Aricò, Paola Verachi, Massimo Zucchetti, Cristina Matteo, Elena Petricci, Emanuela Pilozzi, Isabella Orienti, Alessandra Boe, Adriana Eramo, Rachele Rossi, Tiberio Corati, Daniele Macchia, Anna Maria Pacca, Ann Zeuner, and Marta Baiocchi
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Fenretinide ,Breast cancer ,Tumor dormancy ,Cancer stem cells ,Retinoids ,Metastasis ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Prevention and treatment of metastatic breast cancer (BC) is an unmet clinical need. The retinoic acid derivative fenretinide (FeR) was previously evaluated in Phase I-III clinical trials but, despite its excellent tolerability and antitumor activity in preclinical models, showed limited therapeutic efficacy due to poor bioavailability. We recently generated a new micellar formulation of FeR, Bionanofenretinide (Bio-nFeR) showing enhanced bioavailability, low toxicity, and strong antitumor efficacy on human lung cancer, colorectal cancer, and melanoma xenografts. In the present study, we tested the effect of Bio-nFeR on a preclinical model of metastatic BC. Methods We used BC cell lines for in vitro analyses of cell viability, cell cycle and migratory capacity. For in vivo studies, we used HER2/neu transgenic mice (neuT) as a model of spontaneously metastatic BC. Mice were treated orally with Bio-nFeR and at sacrifice primary and metastatic breast tumors were analyzed by histology and immunohistochemistry. Molecular pathways activated in primary tumors were analyzed by immunoblotting. Stem cell content was assessed by flow cytometry, immunoblotting and functional assays such as colony formation ex vivo and second transplantation assay in immunocompromised mice. Results Bio-nFeR inhibited the proliferation and migration of neuT BC cells in vitro and showed significant efficacy against BC onset in neuT mice. Importantly, Bio-nFeR showed the highest effectiveness against metastatic progression, counteracting both metastasis initiation and expansion. The main mechanism of Bio-nFeR action consists of promoting tumor dormancy through a combined induction of antiproliferative signals and inhibition of the mTOR pathway. Conclusion The high effectiveness of Bio-nFeR in the neuT model of mammary carcinogenesis, coupled with its low toxicity, indicates this formulation as a potential candidate for the treatment of metastatic BC and for the adjuvant therapy of BC patients at high risk of developing metastasis.
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- 2024
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5. Ultra-Hypofractionated Whole Breast Radiotherapy with Automated Hybrid-VMAT Technique: A Pilot Study on Safety, Skin Toxicity and Aesthetic Outcomes
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Boccardi M, Cilla S, Fanelli M, Romano C, Bonome P, Ferro M, Pezzulla D, Di Marco R, Deodato F, and Macchia G
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breast cancer ,ultra-hypofractionated radiotherapy ,cutometer ,hybrid-vmat technique. ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Mariangela Boccardi,1 Savino Cilla,2 Mara Fanelli,3 Carmela Romano,2 Paolo Bonome,1 Milena Ferro,1 Donato Pezzulla,1 Roberto Di Marco,4 Francesco Deodato,1,5,* Gabriella Macchia1,* 1Radiation Oncology Unit, Responsible Research Hospital, Campobasso, Italy; 2Medical Physics Unit, Responsible Research Hospital, Campobasso, Italy; 3Research Laboratories, Responsible Research Hospital, Campobasso, Italy; 4Department of Medicina e Scienze della Salute “V. Tiberio”, Università degli Studi del Molise, Campobasso, Italy; 5Istituto di Radiologia, Università Cattolica del Sacro Cuore, Roma, Italy*These authors contributed equally to this workCorrespondence: Milena Ferro, Responsible Research Hospital, L.go Gemelli, 1, Campobasso, 86100, Italy, Email milena.ferro@responsible.hospitalPurpose: The most prevalent treatment-related side effect related to adjuvant radiotherapy (RT) for breast cancer is acute skin toxicity in the irradiated area. The purpose of this single-institution pilot study is to provide preliminary clinical results on the feasibility and safety of a breast ultra-hypofractionated radiation treatment delivered using an automated hybrid-VMAT technique. Skin damage was assessed both with clinical examination and objectively using a Cutometer equipment.Patients and Methods: Patients received 26 Gy to the whole breast and 30 Gy to the tumoral bed in 5 fractions using an automated hybrid-VMAT approach with the option for the breath hold technique if necessary. Acute and late toxicities were clinically evaluated at baseline, 1- and 6-months after treatment using the CTC-AE v.5.0 scale. An instrumental evaluation of the skin elasticity was performed using a Cutometer® Dual MP580. Two parameters per patient, R0 (the total skin firmness) and Q1 (the elastic recovery), were registered at the different timelines.Results: From June 2022 to January 2024, 30 patients, stage T1-T2, N0 were enrolled in the study. Four out of 30 (13.3%) patients reported G2 acute skin toxicities. At 6 months, G2 late toxicity was registered in 3 patients (10%). A total of 2160 measures of R0 and Q1 were recorded. At 1 month after treatment, no correlation was found between measured values of R0 and Q1 and clinical evaluation. At 6 months after treatment, clinical late toxicity ≥ 1 was strongly associated with decreased R0 and Q1 values ≥ 24% (p = 0.003) and ≥ 18% (p = 0.022), respectively.Conclusion: Ultra-hypofractionated whole-breast radiotherapy, when supported by advanced treatment techniques, is both feasible and safe. No severe adverse effects were observed at any of the different timeframes. Acute and late skin toxicities were shown to be lower in contrast to data presented in the literature.Keywords: breast cancer, ultra-hypofractionated radiotherapy, Cutometer, hybrid-VMAT technique
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- 2024
6. Operational description of rare diseases: a reference to improve the recognition and visibility of rare diseases
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Chiuhui Mary Wang, Amy Heagle Whiting, Ana Rath, Roberta Anido, Diego Ardigò, Gareth Baynam, Hugh Dawkins, Ada Hamosh, Yann Le Cam, Helen Malherbe, Caron M. Molster, Lucia Monaco, Carmencita D. Padilla, Anne R. Pariser, Peter N. Robinson, Charlotte Rodwell, Franz Schaefer, Stefanie Weber, and Flaminia Macchia
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Rare diseases ,Visibility ,Definition ,Coding ,Healthcare systems ,Prevalence ,Medicine - Abstract
Abstract Improving health and social equity for persons living with a rare disease (PLWRD) is increasingly recognized as a global policy priority. However, there is currently no international alignment on how to define and describe rare diseases. A global reference is needed to establish a mutual understanding to inform a wide range of stakeholders for actions. A multi-stakeholder, global panel of rare disease experts, came together and developed an Operational Description of Rare Diseases. This reference describes which diseases are considered rare, how many persons are affected and why the rare disease population demands specific attention. The operational description of rare diseases is framed in two parts: a core definition of rare diseases, complemented by a descriptive framework of rare diseases. The core definition includes parameters that permit the identification of which diseases are considered rare, and how many persons are affected. The descriptive framework elaborates on the impact and burden of rare diseases on patients, their caregivers and families, healthcare systems, and society overall. The Operational Description of Rare Diseases establishes a common point of reference for decision-makers across the world who strive to understand and address the unmet needs of persons living with a rare disease. Adoption of this reference is essential to improving the visibility of rare conditions in health systems across the world. Greater recognition of the burden of rare diseases will motivate new actions and policies to address the unmet needs of the rare disease community.
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- 2024
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7. A combinatorial characterization of $S_2$ binomial edge ideals
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Bolognini, Davide, Macchia, Antonio, Rinaldo, Giancarlo, and Strazzanti, Francesco
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Mathematics - Combinatorics ,Mathematics - Commutative Algebra - Abstract
Several algebraic properties of a binomial edge ideal $J_G$ can be interpreted in terms of combinatorial properties of its associated graph $G$. In particular, the so-called cut-point sets of a graph $G$, special sets of vertices that disconnect $G$ in a minimal way, play an important role since they are in bijection with the minimal prime ideals of $J_G$. In this paper we establish the first graph-theoretical characterization of binomial edge ideals $J_G$ satisfying Serre's condition $(S_2)$ by proving that this is equivalent to having $G$ accessible, which means that $J_G$ is unmixed and the cut-point sets of $G$ form an accessible set system. The proof relies on the combinatorial structure of the Stanley-Reisner simplicial complex of a multigraded generic initial ideal of $J_G$, whose facets can be described in terms of cut-point sets. Another key step in the proof consists in proving the equivalence between accessibility and strong accessibility for the collection of cut sets of $G$ with $J_G$ unmixed. This result, interesting on its own, provides the first relevant class of set systems for which the previous two notions are equivalent.
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- 2023
8. A nanoencapsulated oral formulation of fenretinide promotes local and metastatic breast cancer dormancy in HER2/neu transgenic mice
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De Angelis, Maria Laura, Francescangeli, Federica, Aricò, Eleonora, Verachi, Paola, Zucchetti, Massimo, Matteo, Cristina, Petricci, Elena, Pilozzi, Emanuela, Orienti, Isabella, Boe, Alessandra, Eramo, Adriana, Rossi, Rachele, Corati, Tiberio, Macchia, Daniele, Pacca, Anna Maria, Zeuner, Ann, and Baiocchi, Marta
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- 2024
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9. Operational description of rare diseases: a reference to improve the recognition and visibility of rare diseases
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Wang, Chiuhui Mary, Whiting, Amy Heagle, Rath, Ana, Anido, Roberta, Ardigò, Diego, Baynam, Gareth, Dawkins, Hugh, Hamosh, Ada, Le Cam, Yann, Malherbe, Helen, Molster, Caron M., Monaco, Lucia, Padilla, Carmencita D., Pariser, Anne R., Robinson, Peter N., Rodwell, Charlotte, Schaefer, Franz, Weber, Stefanie, and Macchia, Flaminia
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- 2024
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10. Flavor and taste recognition impairments in people with type 1 diabetes
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Nettore, Immacolata Cristina, Palatucci, Giuseppe, Ungaro, Paola, Scidà, Giuseppe, Corrado, Alessandra, De Vito, Rosa, Vitale, Marilena, Rivieccio, Anna Maria, Annuzzi, Giovanni, Bozzetto, Lutgarda, Colao, Annamaria, and Macchia, Paolo Emidio
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- 2024
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11. Sterile inflammation via TRPM8 RNA-dependent TLR3-NF-kB/IRF3 activation promotes antitumor immunity in prostate cancer
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Alaimo, Alessandro, Genovesi, Sacha, Annesi, Nicole, De Felice, Dario, Subedi, Saurav, Macchia, Alice, La Manna, Federico, Ciani, Yari, Vannuccini, Federico, Mugoni, Vera, Notarangelo, Michela, Libergoli, Michela, Broso, Francesca, Taulli, Riccardo, Ala, Ugo, Savino, Aurora, Cortese, Martina, Mirzaaghaei, Somayeh, Poli, Valeria, Bonapace, Ian Marc, Papotti, Mauro Giulio, Molinaro, Luca, Doglioni, Claudio, Caffo, Orazio, Anesi, Adriano, Nagler, Michael, Bertalot, Giovanni, Carbone, Francesco Giuseppe, Barbareschi, Mattia, Basso, Umberto, Dassi, Erik, Pizzato, Massimo, Romanel, Alessandro, Demichelis, Francesca, Kruithof-de Julio, Marianna, and Lunardi, Andrea
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- 2024
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12. Flavor and taste recognition impairments in people with type 1 diabetes
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Immacolata Cristina Nettore, Giuseppe Palatucci, Paola Ungaro, Giuseppe Scidà, Alessandra Corrado, Rosa De Vito, Marilena Vitale, Anna Maria Rivieccio, Giovanni Annuzzi, Lutgarda Bozzetto, Annamaria Colao, and Paolo Emidio Macchia
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Nutritional diseases. Deficiency diseases ,RC620-627 - Abstract
Abstract Background/objectives Adherence to dietary recommendations is a critical component in the management of type 1 diabetes (T1D). Taste and flavor significantly influence food choices. The aim of this study was to investigate taste sensitivity and flavor recognition ability in adults with T1D compared to healthy individuals. Subjects/methods Seventy-two people with T1D and 72 matched healthy controls participated in the study. Participants underwent the gustometry test for sweet, sour, salty, and bitter tastes and the flavor test, which consisted of oral administration of aqueous aromatic solutions identifying 21 different compounds. Results Participants with T1D had significantly lower flavor scores and gustometry scores than controls (p
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- 2024
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13. Towards Human-Centred Crowd Computing: Software for Better Use of Computational Resources
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Fernando, Niroshinie, Arora, Chetan, Loke, Seng W., Alam, Lubna, La Macchia, Stephen, and Graesser, Helen
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Computer Science - Software Engineering - Abstract
Internet-connected smart devices are increasing at an exponential rate. These powerful devices have created a yet-untapped pool of idle resources that can be utilised, among others, for processing data in resource-depleted environments. The idea of bringing together a pool of smart devices for ``crowd computing'' (CC) has been studied in the recent past from an infrastructural feasibility perspective. However, for the CC paradigm to be successful, numerous socio-technical and software engineering (SE), specifically the requirements engineering (RE)-related factors are at play and have not been investigated in the literature. In this paper, we motivate the SE-related aspects of CC and the ideas for implementing mobile apps required for CC scenarios. We present the results of a preliminary study on understanding the human aspects, incentives that motivate users, and CC app requirements, and present our future development plan in this relatively new field of research for SE applications.
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- 2023
14. Cohen-Macaulay binomial edge ideals of small graphs
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Bolognini, Davide, Macchia, Antonio, Rinaldo, Giancarlo, and Strazzanti, Francesco
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Mathematics - Commutative Algebra ,Mathematics - Combinatorics - Abstract
A combinatorial property that characterizes Cohen-Macaulay binomial edge ideals has long been elusive. A recent conjecture ties the Cohen-Macaulayness of a binomial edge ideal $J_G$ to special disconnecting sets of vertices of its underlying graph $G$, called \textit{cut sets}. More precisely, the conjecture states that $J_G$ is Cohen-Macaulay if and only if $J_G$ is unmixed and the collection of the cut sets of $G$ is an accessible set system. In this paper we prove the conjecture theoretically for all graphs with up to $12$ vertices and develop an algorithm that allows to computationally check the conjecture for all graphs with up to $15$ vertices and all blocks with whiskers where the block has at most $11$ vertices. This significantly extends previous computational results.
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- 2022
15. Discordancias entre las normas y el ambiente en el contexto de expansión urbana de la ciudad bonaerense de Tandil, República Argentina
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Jorge Lapena, María Lorena La Macchia, and Luis Ramírez
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Plan de Desarrollo Territorial (PDT) ,Expansión urbana ,Procesos geomorfológicos ,Discordancias político-ambientales ,Geography. Anthropology. Recreation ,Geography (General) ,G1-922 - Abstract
La ciudad de Tandil (Buenos Aires, República Argentina) presenta un crecimiento poblacional influenciado por el turismo y otras actividades demandantes de espacio urbano. Ello dispara valores inmobiliarios y provoca expansión en nuevas periferias regidas por un Plan de Desarrollo Territorial (PDT), no siempre concordante con la vitalidad ambiental. Esto se corrobora en la periferia noreste. En salidas de campo, el equipo de investigación se propuso analizar los efectos del diseño urbano en función de las características del medio físico y, asimismo, si los problemas se vinculan con violaciones a las normas de urbanización o simplemente no están contempladas. En encuestas y entrevistas se constató lo segundo y, mediante relevamientos, se verificó que también la remoción del suelo y de su cobertura vegetal conducen a una degradación ambiental, con impacto sobre aquellos hogares que escogieron este lugar ante la imposibilidad de radicarse en otras áreas, signadas por los altos valores en el arrendamiento de la vivienda o la compra de esos inmuebles. Aun así, el ordenamiento urbano materializado con el trazado de calles y otras obras, cumple con las prescripciones del PDT; lo que devela una discordancia en relación a los problemas ambientales detectados.
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- 2024
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16. Control biológico por conservación: conceptos clave, estrategias y avances para construir una agroecología sostenible
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Gabriel Macchia
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memoria ecosistémica ,control biológico por conservación ,enemigos naturales ,Agriculture (General) ,S1-972 ,Animal culture ,SF1-1100 ,Ecology ,QH540-549.5 ,Plant ecology ,QK900-989 - Abstract
El control biológico por conservación (CBC) ofrece un camino prometedor para las nuevas prácticas agroecológicas sostenibles que permitan hacer un uso razonable de los recursos disponibles. Estas prácticas involucran la participación de múltiples áreas del conocimiento que convergen con el fin de asegurar la coexistencia entre las actividades agropecuarias y el ecosistema que las rodea. En este escenario, los insectos cumplen un rol fundamental como principales depredadores/parasitoides de otros insectos que son plagas de cultivos. Entender las múltiples y variadas interacciones que tienen lugar en los campos de cultivo es cruciales para las investigaciones en control biológico. Esto permitiría tomar medidas de control sin descuidar el equilibrio de estos ecosistemas. Por esta razón gran parte de los esfuerzos de estas prácticas están relacionadas a la conservación y protección de los insectos. En este trabajo se busca hacer un resumen de la literatura más reciente sobre los conceptos relacionados al CBC, su implicancia económica y las proyecciones futuras.
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- 2024
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17. Luca Vitone: Monitoring of Four Living Canvases
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Camilla Zaratti, Simona Brunetti, Veronica Fondi, Chiara Alisi, Fernanda Prestileo, Tilde de Caro, Stefania Montorsi, and Andrea Macchia
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“atmospheric” painting ,monitoring ,storage ,museum ,microbiology ,cultural heritage preservation ,Archaeology ,CC1-960 - Abstract
“Atmospheric” painting stands as a new frontier in contemporary art, presenting challenges and new considerations in museum practices. This article aims to analyze the possible evolution of four atmospheric paintings created by artist Luca Vitone during their transition from exhibition halls to the storage facilities of the MAXXI museum. The presence of active microbiological consortium raises question regarding the potential interaction these artworks may have with the surrounding environment. The year-long monitoring involved macroscopic and microscopic observation, spectrophotometric analyses, and cell vitality assessments using a bioluminometer. Additionally, the collected data were correlated with the prevailing microclimate within the storage. Indeed, the canvases underwent an evolution during their transfer to the storage; it was mainly the photosynthetic part of the consortium that underwent the greatest changes, resulting in changes in the color tones of the canvases. The viability of the cells in the consortium also underwent changes as indicated by measurements obtained with the bioluminometer. The monitoring has provided invaluable insights into the dynamic evolution of Vitone’s artworks and allowed the authors to hypothesize some strategies for the conservation of these types of artworks.
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- 2024
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18. Long-term electrical characteristics of a poly-3-hexylthiophene water-gated thin-film transistor
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Luukkonen, Axel, Tewari, Amit, Björkström, Kim, Ghafari, Amir Mohammad, Österbacka, Ronald, Macchia, Eleonora, Torricelli, Fabrizio, and Torsi, Luisa
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Physics - Applied Physics - Abstract
Organic water-gated thin-film transistors (WG-TFTs) are of great interest in developing low-cost and high-performance biosensors. The device's sensitivity to changes in measurement conditions can impair long-term operation, and care must be taken to ensure that the WG-TFT sensor response is due to an actual biorecognition event occurring on the sensing electrode. This work aims to clarify the long-term stability of a poly-3-hexylthiophene (P3HT) WG-TFT operated intermittently over two months during 5750 measurement cycles. We have evaluated the device figures of merit (FOM), such as threshold voltage, mobility, and trap density, during the whole measurement period. Short-term changes in the FOM are mainly attributed to work function changes on the gate electrode, whereas long-term changes are consistent with an increase in the semiconductor trap density. The shift in threshold voltage and decrease in mobility are found to be linear as a function of measurement cycles and caused by electrical stress, with time immersed in water having a negligible effect on the device. The trap density-of-states estimated using the subthreshold slope is similar to earlier reported values for P3HT OFETs and exhibits a gradual increase during device use and a partial recovery after rest, indicating the formation of shorter- and longer-lived traps., Comment: Eight pages and five figures
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- 2022
19. Watermelon: setup and validation of an in silico fragment-based approach
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Miriana Di Stefano, Salvatore Galati, Lisa Piazza, Francesca Gado, Carlotta Granchi, Marco Macchia, Antonio Giordano, Tiziano Tuccinardi, and Giulio Poli
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Pharmacophore model ,drug design ,virtual screening ,Therapeutics. Pharmacology ,RM1-950 - Abstract
We present a new computational approach, named Watermelon, designed for the development of pharmacophore models based on receptor structures. The methodology involves the sampling of potential hotspots for ligand interactions within a protein target’s binding site, utilising molecular fragments as probes. By employing docking and molecular dynamics (MD) simulations, the most significant interactions formed by these probes within distinct regions of the binding site are identified. These interactions are subsequently transformed into pharmacophore features that delineates key anchoring sites for potential ligands. The reliability of the approach was experimentally validated using the monoacylglycerol lipase (MAGL) enzyme. The generated pharmacophore model captured features representing ligand-MAGL interactions observed in various X-ray co-crystal structures and was employed to screen a database of commercially available compounds, in combination with consensus docking and MD simulations. The screening successfully identified two new MAGL inhibitors with micromolar potency, thus confirming the reliability of the Watermelon approach.
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- 2024
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20. Final assessment of the COVID-19 pandemic impact between the different social and economic strata population of the city of Buenos Aires
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Alejandro Macchia, Cristian Biscayart, Patricia Angeleri, Javier Mariani, and Daniel Ferrante
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COVID-19 ,Health services accessibility ,Time series studies ,Public aspects of medicine ,RA1-1270 - Abstract
Background: During the pandemic, epidemiological communications reported an estimation of excess deaths. However, the final calculation requires a detailed analysis. The study aim was to ascertain the number and distribution of COVID-19 fatalities among various socio-economic strata in a large, moderate to low-income city. Study design: Observational time series analysis in a large city, treated as a natural experiment. Methods: Analysis of death certificates, demographic data, and health system records of positive RT-PCR COVID-19 tests from 2015 to 2021, categorizing by age, sex, and place of residence. The study measured the pandemic's impact on mortality, including COVID and non-COVID deaths, using corrected Poisson regression models for different demographics and assessing socio-economic status impact via ecological community-level analysis. Results: Compared to the pre-pandemic period (2015–2019, IRR = 1.00), the sex- and age-adjusted rate of all-cause death increased significantly during the pandemic (2020–2021) IRR = 1.109 [1.054–1.167], p
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- 2024
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21. Analysis of Clinical Samples of Pancreatic Cyst's Lesions with A Multi‐Analyte Bioelectronic Simot Array Benchmarked Against Ultrasensitive Chemiluminescent Immunoassay
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Cecilia Scandurra, Kim Björkström, Mariapia Caputo, Lucia Sarcina, Enrico Genco, Francesco Modena, Fabrizio Antonio Viola, Celestino Brunetti, Zsolt M. Kovács‐Vajna, Cinzia Di Franco, Lena Haeberle, Piero Larizza, Maria Teresa Mancini, Ronald Österbacka, William Reeves, Gaetano Scamarcio, May Wheeler, Mario Caironi, Eugenio Cantatore, Fabrizio Torricelli, Irene Esposito, Eleonora Macchia, and Luisa Torsi
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bioelectronic transistors ,liquid biopsy ,multivariate data processing ,SIMOA‐single‐molecule‐array‐ ,SiMoT‐single‐molecule‐with‐a‐large‐transistor ,single‐molecule biosensors ,Science - Abstract
Abstract Pancreatic cancer, ranking as the third factor in cancer‐related deaths, necessitates enhanced diagnostic measures through early detection. In response, SiMoT‐Single‐molecule with a large Transistor multiplexing array, achieving a Technology Readiness Level of 5, is proposed for a timely identification of pancreatic cancer precursor cysts and is benchmarked against the commercially available chemiluminescent immunoassay SIMOA (Single molecule array) SP‐X System. A cohort of 39 samples, comprising 33 cyst fluids and 6 blood plasma specimens, undergoes detailed examination with both technologies. The SiMoT array targets oncoproteins MUC1 and CD55, and oncogene KRAS, while the SIMOA SP‐X planar technology exclusively focuses on MUC1 and CD55. Employing Principal Component Analysis (PCA) for multivariate data processing, the SiMoT array demonstrates effective discrimination of malignant/pre‐invasive high‐grade or potentially malignant low‐grade pancreatic cysts from benign non‐mucinous cysts. Conversely, PCA analysis applied to SIMOA assay reveals less effective differentiation ability among the three cyst classes. Notably, SiMoT unique capability of concurrently analyzing protein and genetic markers with the threshold of one single molecule in 0.1 mL positions it as a comprehensive and reliable diagnostic tool. The electronic response generated by the SiMoT array facilitates direct digital data communication, suggesting potential applications in the development of field‐deployable liquid biopsy.
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- 2024
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22. Archaeometric Investigations on Archaeological Findings from Palazzo Corsini Alla Lungara (Rome)
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Tilde de Caro, Fiammetta Susanna, Paola Fraiegari, Renato Sebastiani, Veronica Romoli, Simone Bruno, and Andrea Macchia
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ceramic production ,Roman technology ,Palazzo Corsini ,Technology ,Chemical technology ,TP1-1185 - Abstract
This study reports the analytical investigations on clayey and ceramic finds, characterised by high variability in terms of prime materials, with the aim to determine the role of this important ceramic production situated close to the city walls, fortuitously found during service excavations developed in the garden of Palazzo Corsini in Rome. The complexity of the finds led to the choices of appropriate methodologies and techniques suitable for defining the diagnostic elements of each find. Optical microscopy (OM) combined with micro-Raman (µ-Raman) spectroscopy, X-ray diffractometry (XRD), scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDS), and differential thermal analysis (DTA) were used to analyse the nature and microstructure of the ceramic and burned clay that were found. In such a complicated setting, the objective of conducting chemical analyses is to provide clues to describe the various kinds of ceramics produced, the production and processing methods, and, as a result, the typology of the workshop.
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- 2024
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23. Why a diffusing single-molecule can be detected in few minutes by a large capturing bioelectronic interface
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Macchia, Eleonora, De Caro, Liberato, Torricelli, Fabrizio, Di Franco, Cinzia, Mangiatordi, Giuseppe Felice, Scamarcio, Gaetano, and Torsi, Luisa
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Physics - Chemical Physics ,Condensed Matter - Materials Science ,62P10 - Abstract
Single-molecule detection at a nanometric interface in a femtomolar solution, can take weeks as the encounter rate between the diffusing molecule to be detected and the transducing nano-device is negligibly small. On the other hand, several experiments prove that macroscopic label-free sensors based on field-effect-transistors (FET), engaging micrometric or millimetric detecting interfaces are capable to assay a single-molecule in a large volume within few minutes. The present work demonstrates why at least a single molecule out of a few diffusing in a 100 ul volume has a very high probability to hit a large capturing and detecting electronic interface. To this end, sensing data, measured with an electrolyte-gated FET whose gate is functionalized with 1012 capturing anti-immunoglobulin G, are here provided along with a Brownian diffusion-based modelling. The EG-FET assays solutions down to some tens of zM in concentrations with volumes ranging from 25 ul to 1 ml in which the functionalized gates are incubated for times ranging from 30 s to 20 min., Comment: 30 Pages, 7 figure, submitted
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- 2022
24. Powers of monomial ideals with characteristic-dependent Betti numbers
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Bolognini, Davide, Macchia, Antonio, Strazzanti, Francesco, and Welker, Volkmar
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Mathematics - Commutative Algebra ,Mathematics - Combinatorics - Abstract
We explore the dependence of the Betti numbers of monomial ideals on the characteristic of the field. A first observation is that for a fixed prime $p$ either the $i$-th Betti number of all high enough powers of a monomial ideal differs in characteristic $0$ and in characteristic $p$ or it is the same for all high enough powers. In our main results we provide constructions and explicit examples of monomial ideals all of whose powers have some characteristic-dependent Betti numbers or whose asymptotic regularity depends on the field. We prove that, adding a monomial on new variables to a monomial ideal, allows to spread the characteristic dependence to all powers. For any given prime $p$, this produces an edge ideal such that the Betti numbers of all its powers over $\mathbb{Q}$ and over $\mathbb{Z}_p$ are different. Moreover, we show that, for every $r \geq 0$ and $i \geq 3$ there is a monomial ideal $I$ such that some coefficient in a degree $\geq r$ of the Kodiyalam polynomials $\mathfrak P_3(I),\ldots,\mathfrak P_{i+r}(I)$ depends on the characteristic. We also provide a summary of related results and speculate about the behaviour of other combinatorially defined ideals.
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- 2022
25. The link between MiFID and Risk Appetite Framework as an application of best practices for wealth management and the entire value chain of the financial industry
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Gianluca Macchia, Emanuele De Angelis, and Michele Vitagliano
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mifid ,risk appetite framework ,Risk in industry. Risk management ,HD61 - Abstract
After a short review of the MiFID regulations and the RAF, the paper identifies the link between them which allows to mitigate a balance sheet risk sustained by the financial intermediary and, at the same time, to improve its stability and value creation, through a maximization of customer loyalty. The client’s attitude towards risk can be summarized in these terms: "I don't like risk, but I like to win". Thus, a three-dimensional approach towards expected utility is suggested for estimating risk tolerance: risk aversion, loss aversion and reflection. In addition, a definition of the client's financial objectives is required, combined with greater disclosure - which allows the construction of a financial statement – to attest that risk-taking is indeed a luxury, as indicated by the metrics of the discretionary wealth ratio, and therefore, of the Standard of Living Risk (SLR). The next step consists in the determination of a set of portfolios along the efficient frontier where risk is represented by the expected shortfall, the determination of which belongs to a Generalized Extreme Value Theory logic. The client's objectives are described in terms of probability of success, where the latter is a function of an initial endowment, a potential positive contribution of financial resources over time as well as an expected return level. The above is expressed through a practical case that envisages the determination of a set of EGPF portfolios and the identification of the specific portfolio, obtained as a solution to a static and dynamic optimization problem, where the objectives have been formalized through the calculation of the associated utility.
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- 2023
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26. Multispecies Trichoderma in Combination with Hydrolyzed Lignin Improve Tomato Growth, Yield, and Nutritional Quality of Fruits
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Stefania Lanzuise, Gelsomina Manganiello, Cono Vincenzo, Petronia Carillo, Vito Macchia, Suvi Pietarinen, Giovanna Marta Fusco, Rosalinda Nicastro, Matteo Lorito, and Sheridan Lois Woo
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biostimulants ,microbial consortia ,sustainable agriculture ,GABA ,essential amino acids ,lycopene ,Agriculture - Abstract
The application of biological pesticides as alternatives to chemical phytosanitary products is a natural and innovative method to improve environmental protection and sustainable agricultural production. In this work, the compatibility between Trichoderma spp. and a commercial lignin extract was assessed in vitro and in vivo. The beneficial effects of lignin in combination with different Trichoderma consortia were evaluated in terms of improved growth and quantitative and qualitative tomato productivity. T. virens GV41 + T. asperellum + T. atroviride + lignin formulation was the most effective in growth promotion and increased root and stem dry weight compared to control (45.4 and 43.9%, respectively). This combination determined a 63% increase in tomato yield compared to the control, resulting in the best-performing treatment compared to each individual constituent. Consistent differences in terms of lycopene, GABA, ornithine, total, essential, and branched-chain amino acids were revealed in fruits from tomato plants treated with Trichoderma–lignin formulations (T. asperellum + T. virens GV41 + lignin) or with the microbial consortia (T. asperellum + T. virens GV41, T. atroviride + T. virens GV41). The developed bioformulations represent a sustainable biological strategy to increase yield and produce nutritional compound-enriched vegetables.
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- 2024
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27. Comparative Analysis on Polyphenolic Composition of Different Olive Mill Wastewater and Related Extra Virgin Olive Oil Extracts and Evaluation of Nutraceutical Properties by Cell-Based Studies
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Doretta Cuffaro, Andrea Bertolini, Ana Margarida Silva, Francisca Rodrigues, Daniela Gabbia, Sara De Martin, Alessandro Saba, Simone Bertini, Maria Digiacomo, and Marco Macchia
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olive mill wastewater ,polyphenols ,nutraceutical ,oleacein ,antiinflammatory ,by-products ,Chemical technology ,TP1-1185 - Abstract
This study reports a comparative analysis of the polyphenolic composition and nutraceutical properties of different olive mill wastewater (OMWW) and corresponding extra virgin olive oil (EVOO) extracts. Specifically, four OMWWs and corresponding EVOOs from cultivars Frantoio (A) and Leccino (B) obtained from different crushing seasons (early-stage (A1 and B1) and later-stage (A2 and B2)) were analyzed. Employing HPLC-DAD and LC-MS methods, the primary polyphenol content was identified and quantified. Overall, OMWW extracts showed a greater polyphenolic content compared to corresponding EVOO extracts, with OMWW B1 displaying the highest levels of polyphenols. The antiradical properties of extracts towards radical species (DPPH, ABTS, O2−, and HOCl−) were demonstrated in vitro, revealing a correlation with polyphenolic content. In fact, OMWW B1 and B2 demonstrated the strongest antiradical activity. Exploring nutraceutical properties of OMWWs, the intestinal permeation of the main polyphenols in a co-culture model (Caco-2 and HT29-MTX cell lines) was assessed, with tyrosol achieving a permeation of almost 60%. Furthermore, the involvement in the inflammation process has been evaluated in cell studies on THP1-derived macrophages by immunocytochemistry, demonstrating that OMWW B1 may exert an anti-inflammatory effect by modulating specific phenotype expression on macrophages. In conclusion, this study provides evidence supporting the reuse of OMWWs as a source of polyphenols with nutraceutical properties.
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- 2024
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28. T Cell Peptide Prediction, Immune Response, and Host–Pathogen Relationship in Vaccinated and Recovered from Mild COVID-19 Subjects
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Iole Macchia, Valentina La Sorsa, Alessandra Ciervo, Irene Ruspantini, Donatella Negri, Martina Borghi, Maria Laura De Angelis, Francesca Luciani, Antonio Martina, Silvia Taglieri, Valentina Durastanti, Maria Concetta Altavista, Francesca Urbani, and Fabiola Mancini
- Subjects
COVID-19 ,bioinformatics ,ELISpot ,T cell epitopes ,T peptide ,neutralizing antibodies ,Microbiology ,QR1-502 - Abstract
COVID-19 remains a significant threat, particularly to vulnerable populations. The emergence of new variants necessitates the development of treatments and vaccines that induce both humoral and cellular immunity. This study aimed to identify potentially immunogenic SARS-CoV-2 peptides and to explore the intricate host–pathogen interactions involving peripheral immune responses, memory profiles, and various demographic, clinical, and lifestyle factors. Using in silico and experimental methods, we identified several CD8-restricted SARS-CoV-2 peptides that are either poorly studied or have previously unreported immunogenicity: fifteen from the Spike and three each from non-structural proteins Nsp1-2-3-16. A Spike peptide, LA-9, demonstrated a 57% response rate in ELISpot assays using PBMCs from 14 HLA-A*02:01 positive, vaccinated, and mild-COVID-19 recovered subjects, indicating its potential for diagnostics, research, and multi-epitope vaccine platforms. We also found that younger individuals, with fewer vaccine doses and longer intervals since infection, showed lower anti-Spike (ELISA) and anti-Wuhan neutralizing antibodies (pseudovirus assay), higher naïve T cells, and lower central memory, effector memory, and CD4hiCD8low T cells (flow cytometry) compared to older subjects. In our cohort, a higher prevalence of Vδ2-γδ and DN T cells, and fewer naïve CD8 T cells, seemed to correlate with strong cellular and lower anti-NP antibody responses and to associate with Omicron infection, absence of confusional state, and habitual sporting activity.
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- 2024
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29. Anti-Tumor Immunity to Patient-Derived Breast Cancer Cells by Vaccination with Interferon-Alpha-Conditioned Dendritic Cells (IFN-DC)
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Caterina Lapenta, Stefano Maria Santini, Celeste Antonacci, Simona Donati, Serena Cecchetti, Patrizia Frittelli, Piera Catalano, Francesca Urbani, Iole Macchia, Massimo Spada, Sara Vitale, Zuleika Michelini, Domenico Cristiano Corsi, Ann Zeuner, Rosanna Dattilo, and Manuela Tamburo De Bella
- Subjects
cancer vaccines ,immunotherapy ,breast cancer ,dendritic cells ,Medicine - Abstract
Background: Breast cancer represents one of the leading causes of death among women. Surgery can be effective, but once breast cancer has metastasized, it becomes extremely difficult to treat. Conventional therapies are associated with substantial toxicity and poor efficacy due to tumor heterogeneity, treatment resistance and disease relapse. Moreover, immune checkpoint blockade appears to offer limited benefit in breast cancer. The poor tumor immunogenicity and the immunosuppressive tumor microenvironment result in scarce T-cell infiltration, leading to a low response rate. Thus, there is considerable interest in the development of improved active immunotherapies capable of sensitizing a patient’s immune system against tumor cells. Methods: We evaluated the in vitro anti-tumor activity of a personalized vaccine based on dendritic cells generated in the presence of interferon (IFN)-α and granulocyte-macrophage colony-stimulating factor (IFN-DC) and loaded with an oxidized lysate from autologous tumor cells expanded as 3D organoid culture maintaining faithful tumor antigenic profiles. Results: Our findings demonstrate that stimulation of breast cancer patients’ lymphocytes with autologous IFN-DC led to efficient Th1-biased response and the generation in vitro of potent cytotoxic activity toward the patients’ own tumor cells. Conclusions: This approach can be potentially applied in association with checkpoint blockade and chemotherapy in the design of new combinatorial therapies for breast cancer.
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- 2024
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30. Unraveling the Protective Role of Oleocanthal and Its Oxidation Product, Oleocanthalic Acid, against Neuroinflammation
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Maria Cristina Barbalace, Michela Freschi, Irene Rinaldi, Lorenzo Zallocco, Marco Malaguti, Clementina Manera, Gabriella Ortore, Mariachiara Zuccarini, Maurizio Ronci, Doretta Cuffaro, Marco Macchia, Silvana Hrelia, Laura Giusti, Maria Digiacomo, and Cristina Angeloni
- Subjects
oleocanthal ,oleocanthalic acid ,neuroinflammation ,BV-2 microglial cells ,lipopolysaccharide ,TLR4 ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Neuroinflammation is a critical aspect of various neurodegenerative diseases, such as Alzheimer’s and Parkinson’s diseases. This study investigates the anti-neuroinflammatory properties of oleocanthal and its oxidation product, oleocanthalic acid, using the BV-2 cell line activated with lipopolysaccharide. Our findings revealed that oleocanthal significantly inhibited the production of pro-inflammatory cytokines and reduced the expression of inflammatory genes, counteracted oxidative stress induced by lipopolysaccharide, and increased cell phagocytic activity. Conversely, oleocanthalic acid was not able to counteract lipopolysaccharide-induced activation. The docking analysis revealed a plausible interaction of oleocanthal, with both CD14 and MD-2 leading to a potential interference with TLR4 signaling. Since our data show that oleocanthal only partially reduces the lipopolysaccharide-induced activation of NF-kB, its action as a TLR4 antagonist alone cannot explain its remarkable effect against neuroinflammation. Proteomic analysis revealed that oleocanthal counteracts the LPS modulation of 31 proteins, including significant targets such as gelsolin, clathrin, ACOD1, and four different isoforms of 14-3-3 protein, indicating new potential molecular targets of the compound. In conclusion, oleocanthal, but not oleocanthalic acid, mitigates neuroinflammation through multiple mechanisms, highlighting a pleiotropic action that is particularly important in the context of neurodegeneration.
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- 2024
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31. Final assessment of the COVID-19 pandemic impact between the different social and economic strata population of the city of Buenos Aires
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Macchia, Alejandro, Biscayart, Cristian, Angeleri, Patricia, Mariani, Javier, and Ferrante, Daniel
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- 2024
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32. Computationally driven discovery of SARS-CoV-2 Mpro inhibitors: from design to experimental validation
- Author
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Khoury, L. El, Jing, Z., Cuzzolin, A., Deplano, A., Loco, D., Sattarov, B., Hédin, F., Wendeborn, S., Ho, C., Ahdab, D. El, Inizan, T. Jaffrelot, Sturlese, M., Sosic, A., Volpiana, M., Lugato, A., Barone, M., Gatto, B., Macchia, M. Ludovica, Bellanda, M., Battistutta, R., Salata, C., Kondratov, I., Iminov, R., Khairulin, A., Mykhalonok, Y., Pochepko, A., Chashka-Ratushnyi, V., Kos, I., Moro, S., Montes, M., Ren, P., Ponder, J. W., Lagardère, L., Piquemal, J. -P., and Sabbadin, D.
- Subjects
Physics - Chemical Physics ,Quantitative Biology - Biomolecules - Abstract
We report a fast-track computationally-driven discovery of new SARS-CoV2 Main Protease (M$^{pro}$) inhibitors whose potency range from mM for initial non-covalent ligands to sub-$\mu$M for the final covalent compound (IC50=830 +/- 50 nM). The project extensively relied on high-resolution all-atom molecular dynamics simulations and absolute binding free energy calculations performed using the polarizable AMOEBA force field. The study is complemented by extensive adaptive sampling simulations that are used to rationalize the different ligands binding poses through the explicit reconstruction of the ligand-protein conformation spaces. Machine Learning predictions are also performed to predict selected compound properties. While simulations extensively use High Performance Computing to strongly reduce time-to-solution, they were systematically coupled to Nuclear Magnetic Resonance experiments to drive synthesis and to in vitro characterization of compounds. Such study highlights the power of in silico strategies that rely on structure-based approaches for drug design and allows to address the protein conformational multiplicity problem. The proposed fluorinated tetrahydroquinolines open routes for further optimization of M$^{pro}$ inhibitors towards low nM affinities.
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- 2021
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33. General non-realizability certificates for spheres with linear programming
- Author
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Gouveia, Joao, Macchia, Antonio, and Wiebe, Amy
- Subjects
Mathematics - Combinatorics ,Mathematics - Commutative Algebra - Abstract
In this paper we present a simple technique to derive certificates of non-realizability for an abstract polytopal sphere. Our approach uses a variant of the classical algebraic certificates introduced by Bokowski and Sturmfels in [Computational Synthetic Geometry, 1989], the final polynomials. More specifically we reduce the problem of finding a realization to that of finding a positive point in a variety and try to find a polynomial with positive coefficients in the generating ideal (a positive polynomial), showing that such point does not exist. Many, if not most, of the techniques for proving non-realizability developed in the last three decades can be seen as following this framework, using more or less elaborate ways of constructing such positive polynomials. Our proposal is more straightforward as we simply use linear programming to exhaustively search for such positive polynomials in the ideal restricted to some linear subspace. Somewhat surprisingly, this elementary strategy yields results that are competitive with more elaborate alternatives, and allows us to derive new examples of non-realizable abstract polytopal spheres.
- Published
- 2021
34. Agency appraisal of emotions and brand trust
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Sung, Billy, La Macchia, Stephen, and Stankovic, Michelle
- Published
- 2023
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35. Towards an understanding of genetic resistance to Flavobacterium psychrophilum in Atlantic salmon (Salmo salar L.) and rainbow trout (Oncorhynchus mykiss (Walbaum, 1792))
- Author
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Macchia, Valeria, Desbois, Andrew, and Bartie, Kerry
- Subjects
Flavobacterium psychrophilum ,Disease resistance ,Flavobacteriosis ,Atlantic salmon ,Rainbow trout ,Fishes--Diseases ,Fishes--Genetics ,Natural immunity - Abstract
Flavobacteriosis is a widespread challenge for the aquaculture sector, with infections reported in salmonids farmed in Scotland, Chile, Norway, and Canada, causing major welfare, environmental and economic concerns. A better understanding of the interactions between the host immune system and the pathogens are required for the development of new methods to control or prevent disease outbreaks. The current treatment and prevention programmes are limited to antimicrobial therapy and vaccines (ALPHA JECT® IPNV-Flavo) delivered by injection and therefore not suitable for fry, which is when the fish are most vulnerable to this pathogen. As the sector continues to move away from antibiotic treatments, a genetic breakthrough could be the key to preventing Flavobacterium psychrophilum infections in Atlantic salmon and rainbow trout. The selection of families of fish with resistance or decreased susceptibility to this pathogen offers another possibility for addressing the problems posed by F. psychrophilum. Therefore, the aim of this thesis was to study F. psychrophilum infection in rainbow trout, Oncorhynchus mykiss (Walbaum, 1792), and Atlantic salmon (Salmo salar L.) resistant and susceptible families, and to uncover the genetic underpinnings of resistance to F. psychrophilum. To achieve this, a successful immersion challenge model for F. psychrophilum in Atlantic salmon and rainbow trout, which mimics the natural infection route, was developed. Rainbow trout and Atlantic salmon were challenged using this newly developed challenge model, and a genome wide association study (GWAS) was conducted in both species, which identified genetic markers for disease resistance. In rainbow trout resistance to F. psychrophilum is a polygenic trait, while in Atlantic salmon the trait is oligogenic, which suggests that the trait is influenced by few genes with large effects (Chapter 2). A SYBR Green quantitative polymerase chain reaction (qPCR) was developed, validated, and used to quantify F. psychrophilum load in Atlantic salmon and rainbow trout head kidney tissues at different time points post challenge. However, there was not a clear relationship between fish genotype and bacterial load in head kidney tissues (Chapter 3). Since F. psychrophilum infection was not solely localised to the head kidney, and low bacterial load was determined in this tissue, the mucosal immune response of Atlantic salmon and rainbow trout was investigated by immunohistochemistry (IHC) by detecting and quantifying F. psychrophilum in different tissues (gills, head kidney, and gut), and the IHC supported the qPCR results of low bacterial load in the head kidney. Similarly, immunoglobulin T (IgT) positive cells were detected in all mucosal tissues, with the highest detection in the secondary lamellae of the gills, suggesting the importance of this immunoglobulin (Ig) in teleosts (Chapter 4). Finally, for the first time the transcriptomic response to F. psychrophilum infection in Atlantic salmon head kidney was investigated to unravel genes and pathways that take part in disease resistance. Genes and pathways up regulated in infected Atlantic salmon head kidney included those related to the immune response, cell chemotaxis and iron homeostasis; pattern recognition receptors (PRRs), complement molecules, inflammatory cytokines, chemokines, and iron-related genes, which indicated these genes participate in the response of Atlantic salmon to F. psychrophilum challenge (Chapter 5). This present study is the first to describe a F. psychrophilum immersion challenge model that can be used to study host-pathogen interactions, and molecular and immunological techniques that allow for the rapid detection of this bacterium in infected fish tissues. Moreover, the transcriptomic study provided an insight into the immune system and the defence mechanisms of Atlantic salmon against F. psychrophilum, which is an important step forward towards preventing infections by this bacterium in farmed Atlantic salmon.
- Published
- 2022
36. Water‐Based Conductive Ink Formulations for Enzyme‐Based Wearable Biosensors
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Angelo Tricase, Anna Imbriano, Marlene Valentino, Nicoletta Ditaranto, Eleonora Macchia, Cinzia Di Franco, Reshma Kidayaveettil, Dónal Leech, Matteo Piscitelli, Gaetano Scamarcio, Gaetano Perchiazzi, Luisa Torsi, and Paolo Bollella
- Subjects
glucose biosensors ,lactate biosensors ,modified electrodes ,water‐based conductive inks ,wearable biosensors ,Technology (General) ,T1-995 ,Science - Abstract
Abstract Herein, this work reports the first example of second‐generation wearable biosensor arrays based on a printed electrode technology involving a water‐based graphite ink, for the simultaneous detection of l‐lactate and d‐glucose. The water‐based graphite ink is deposited onto a flexible polyethylene terephthalate sheet, namely stencil‐printed graphite (SPG) electrodes, and further modified with [Os(bpy)2(Cl)(PVI)10] as an osmium redox polymer to shuttle the electrons from the redox center of lactate oxidase from Aerococcus viridans (LOx) and gluocose oxidase from Aspergillus niger (GOx). The proposed biosensor array exhibits a limit of detection as low as (9.0 ± 1.0) × 10−6 m for LOx/SPG‐[Os(bpy)2(Cl)(PVI)10] and (3.0 ± 0.5) × 10−6 m for GOx/SPG‐[Os(bpy)2(Cl)(PVI)10], a sensitivity as high as 1.32 μA mm−1 for LOx/SPG‐[Os(bpy)2(Cl)(PVI)10] and 28.4 μA mm−1 for GOx/SPG‐[Os(bpy)2(Cl)(PVI)10]. The technology is also selective when tested in buffer and artificial sweat and is endowed with an operational/storage stability of ≈80% of the initial signal retained after 20 days. Finally, the proposed array is integrated in a wristband and successfully tested for the continuous monitoring of l‐lactate and d‐glucose in a healthy volunteer during daily activity. This is foreseen as a real‐time wearable device for sport‐medicine and healthcare applications.
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- 2024
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37. An extended amygdala-midbrain circuit controlling cocaine withdrawal-induced anxiety and reinstatement
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Tian, Guilian, Hui, May, Macchia, Desiree, Derdeyn, Pieter, Rogers, Alexandra, Hubbard, Elizabeth, Liu, Chengfeng, Vasquez, Jose J, Taniguchi, Lara, Bartas, Katrina, Carroll, Sean, and Beier, Kevin T
- Subjects
Biological Sciences ,Substance Misuse ,Behavioral and Social Science ,Basic Behavioral and Social Science ,Neurosciences ,Drug Abuse (NIDA only) ,2.1 Biological and endogenous factors ,Mental health ,Good Health and Well Being ,Amygdala ,Anxiety ,Cocaine ,Cocaine-Related Disorders ,Dopamine ,Humans ,Ventral Tegmental Area ,CP: Neuroscience ,addiction ,anxiety ,calcium imaging ,chemogenetics ,cocaine withdrawal ,dopamine ,extended amygdala ,rabies circuit mapping ,reinstatement ,Biochemistry and Cell Biology ,Medical Physiology ,Biological sciences - Abstract
Although midbrain dopamine (DA) circuits are central to motivated behaviors, our knowledge of how experience modifies these circuits to facilitate subsequent behavioral adaptations is limited. Here we demonstrate the selective role of a ventral tegmental area DA projection to the amygdala (VTADA→amygdala) for cocaine-induced anxiety but not cocaine reward or sensitization. Our rabies virus-mediated circuit mapping approach reveals a persistent elevation in spontaneous and task-related activity of inhibitory GABAergic cells from the bed nucleus of the stria terminalis (BNST) and downstream VTADA→amygdala cells that can be detected even after a single cocaine exposure. Activity in BNSTGABA→midbrain cells is related to cocaine-induced anxiety but not reward or sensitization, and silencing this projection prevents development of anxiety during protracted withdrawal after cocaine administration. Finally, we observe that VTADA→amygdala cells are strongly activated after a challenge exposure to cocaine and that activity in these cells is necessary and sufficient for reinstatement of cocaine place preference.
- Published
- 2022
38. A student-centered seminar course as a complementary approach to a traditional journal club
- Author
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Rogers, Alexandra, Toledano, Michael, Hubbard, Elizabeth, Macchia, Desiree, Hui, May, and Beier, Kevin T
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Curriculum and Pedagogy ,Education ,Clinical Research ,Achievement ,Curriculum ,Humans ,Retrospective Studies ,Students ,Writing ,graduate seminar ,student centered ,Physiology ,Specialist Studies in Education ,Curriculum and pedagogy - Abstract
Graduate physiology programs strive to provide students with in-depth expertise in a particular academic discipline, often facilitating this process in the form of a departmental seminar course. Within the Department of Physiology and Biophysics at the University of California Irvine (UCI), students are required to attend a seminar course, most often designed as a journal club, each quarter until they are ready to graduate. While this format may work well in departments where research topics are closely related, it has historically been less successful in UCI's Department of Physiology and Biophysics, where wide-ranging interests make for little overlap in foundational knowledge, limiting meaningful engagement with the material or with peers in the class. In this paper, we describe a complementary approach of developing a syllabus around student interests and covering topics that are critical for student success but often omitted from graduate curricula, such as interview skills, grant writing, and scientific communication. Results from our preclass survey motivated this approach to the class, and our retrospective survey demonstrated the substantial differences in student engagement, enthusiasm, and perceived benefits of this course relative to the journal club style course. We hope that the success of our course may serve as an exemplar for strategies to engage students more effectively and provide critical training in diverse skillsets that will help students after graduation.
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- 2022
39. Slack matrices, $k$-products, and $2$-level polytopes
- Author
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Aprile, Manuel, Conforti, Michele, Faenza, Yuri, Fiorini, Samuel, Huynh, Tony, and Macchia, Marco
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Computer Science - Discrete Mathematics ,Mathematics - Combinatorics ,Mathematics - Optimization and Control - Abstract
In this paper, we study algorithmic questions concerning products of matrices and their consequences for recognition algorithms for polyhedra. The 1-product of matrices $S_1$, $S_2$ is a matrix whose columns are the concatenation of each column of $S_1$ with each column of $S_2$. The $k$-product generalizes the $1$-product, by taking as input two matrices $S_1, S_2$ together with $k-1$ special rows of each of those matrices, and outputting a certain composition of $S_1,S_2$. Our study is motivated by a close link between the 1-product of matrices and the Cartesian product of polytopes, and more generally between the $k$-product of matrices and the glued product of polytopes. These connections rely on the concept of slack matrix, which gives an algebraic representation of classes of affinely equivalent polytopes. The slack matrix recognition problem is the problem of determining whether a given matrix is a slack matrix. This is an intriguing problem whose complexity is unknown. Our algorithm reduces the problem to instances which cannot be expressed as $k$-products of smaller matrices. In the second part of the paper, we give a combinatorial interpretation of $k$-products for two well-known classes of polytopes: 2-level matroid base polytopes and stable set polytopes of perfect graphs. We also show that the slack matrix recognition problem is polynomial-time solvable for such polytopes. Those two classes are special cases of $2$-level polytopes, for which we conjecture that the slack matrix recognition problem is polynomial-time solvable., Comment: arXiv admin note: substantial text overlap with arXiv:2002.02264
- Published
- 2021
40. New Chemical Systems for the Removal of Calcareous Encrustations on Monumental Fountains: A Case Study of the Nymphaeum of Cerriglio
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Claudia Squarciafico, Giorgia Salatino, Mauro Francesco La Russa, Teresa Peluso, Lorenzo Basile, Fina Serena Barbagallo, Monica Coppola, and Andrea Macchia
- Subjects
monumental fountains ,calcareous encrustation ,chelators ,chemical system ,Archaeology ,CC1-960 - Abstract
This study aims to compare the effects of some chemical agents on the removal of calcareous encrustations, which are characterized by the presence of both calcium and silicon. The experimentation was conducted during the conservation treatments of Cerriglio’s nymphaeum (Massa Lubrense, Naples, Italy). Tests were carried out in the laboratory on specimens and in situ to define the most efficient choice between several chelant agents, in the recovery of calcium and silicon, using ICP/OES and spectrocolorimetric and microscopic analyses.
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- 2023
- Full Text
- View/download PDF
41. Uncovering the Connectivity Logic of the Ventral Tegmental Area
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Derdeyn, Pieter, Hui, May, Macchia, Desiree, and Beier, Kevin T
- Subjects
Biomedical and Clinical Sciences ,Neurosciences ,Drug Abuse (NIDA only) ,Substance Misuse ,Behavioral and Social Science ,Basic Behavioral and Social Science ,1.1 Normal biological development and functioning ,Neurological ,Good Health and Well Being ,Dopamine ,Logic ,Substantia Nigra ,Tegmentum Mesencephali ,Ventral Tegmental Area ,VTA ,rabies ,circuit mapping ,dopamine ,inputs and outputs ,high dimension datasets ,spatial patterning ,Biological psychology - Abstract
Decades of research have revealed the remarkable complexity of the midbrain dopamine (DA) system, which comprises cells principally located in the ventral tegmental area (VTA) and substantia nigra pars compacta (SNc). Neither homogenous nor serving a singular function, the midbrain DA system is instead composed of distinct cell populations that (1) receive different sets of inputs, (2) project to separate forebrain sites, and (3) are characterized by unique transcriptional and physiological signatures. To appreciate how these differences relate to circuit function, we first need to understand the anatomical connectivity of unique DA pathways and how this connectivity relates to DA-dependent motivated behavior. We and others have provided detailed maps of the input-output relationships of several subpopulations of midbrain DA cells and explored the roles of these different cell populations in directing behavioral output. In this study, we analyze VTA inputs and outputs as a high dimensional dataset (10 outputs, 22 inputs), deploying computational techniques well-suited to finding interpretable patterns in such data. In addition to reinforcing our previous conclusion that the connectivity in the VTA is dependent on spatial organization, our analysis also uncovered a set of inputs elevated onto each projection-defined VTADA cell type. For example, VTADA→NAcLat cells receive preferential innervation from inputs in the basal ganglia, while VTADA→Amygdala cells preferentially receive inputs from populations sending a distributed input across the VTA, which happen to be regions associated with the brain's stress circuitry. In addition, VTADA→NAcMed cells receive ventromedially biased inputs including from the preoptic area, ventral pallidum, and laterodorsal tegmentum, while VTADA→mPFC cells are defined by dominant inputs from the habenula and dorsal raphe. We also go on to show that the biased input logic to the VTADA cells can be recapitulated using projection architecture in the ventral midbrain, reinforcing our finding that most input differences identified using rabies-based (RABV) circuit mapping reflect projection archetypes within the VTA.
- Published
- 2022
42. Cohen-Macaulay binomial edge ideals and accessible graphs
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Bolognini, Davide, Macchia, Antonio, and Strazzanti, Francesco
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Mathematics - Commutative Algebra ,Mathematics - Combinatorics - Abstract
The cut sets of a graph are special sets of vertices whose removal disconnects the graph. They are fundamental in the study of binomial edge ideals, since they encode their minimal primary decomposition. We introduce the class of accessible graphs as the graphs with unmixed binomial edge ideal and whose cut sets form an accessible set system. We prove that the graphs whose binomial edge ideal is Cohen-Macaulay are accessible and we conjecture that the converse holds. We settle the conjecture for large classes of graphs, including chordal and traceable graphs, providing a purely combinatorial description of Cohen-Macaulayness. The key idea in the proof is to show that both properties are equivalent to a further combinatorial condition, which we call strong unmixedness., Comment: accepted in Journal of Algebraic Combinatorics
- Published
- 2021
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43. Functionalization of Artwork Packaging Materials Utilizing Ag-Doped TiO2 and ZnO Nanoparticles
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Tilde de Caro, Roberta Grazia Toro, Luminita Cassone, Francesca Irene Barbaccia, Camilla Zaratti, Irene Angela Colasanti, Mauro Francesco La Russa, and Andrea Macchia
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storage ,packaging ,smart ,museum ,nanomaterials ,TiO2 ,Organic chemistry ,QD241-441 - Abstract
Most of the artworks stored in museums are often kept in inappropriate climatic and environmental conditions that facilitate the formation and growth of microorganisms, such as fungi, which are responsible for many types of biodegradation phenomena. To mitigate and prevent these deteriorative processes, functionalized packaging materials can be used for the storage and handling of artworks. The aim of this study was to develop a potential anti-biodeterioration coating suitable for packaging purposes. TiO2 and ZnO doped with different amounts of Ag (0.5 wt%, 1 wt%, and 3 wt%) were synthesized and dispersed in polyvinyl alcohol (PVA) and acrylic resin (Paraloid B72), then applied on different types of packaging materials (cellulose and the high-density spunbound polyethylene fiber Tyvek®, materials that are frequently used as packaging in museums). Analytical investigations (SEM/EDS, Raman, FTIR, and XRD) were employed to assess dispersion on the packaging material. Furthermore, resistance against biodeteriogens was assessed using Cladosporium sp., a bioluminometer, to define the biocidal efficacy.
- Published
- 2024
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44. Mattel’s ©Barbie: Preventing Plasticizers Leakage in PVC Artworks and Design Objects through Film-Forming Solutions
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Andrea Macchia, Livia Marinelli, Francesca Irene Barbaccia, Tilde de Caro, Alice Hansen, Lisa Maria Schuberthan, Francesca Caterina Izzo, Valentina Pintus, Katiuscia Testa Chiari, and Mauro Francesco La Russa
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p-PVC ,phthalate ,SEM analysis ,microbial attack ,chitosan ,collagen ,Organic chemistry ,QD241-441 - Abstract
The main conservation problem of p-PVC artworks is phthalate-based plasticizer migration. Phthalate migration from the bulk to the surface of the materials leads to the formation of a glossy and oily film on the outer layers, ultimately reducing the flexibility of the material. This study aimed to develop a removable coating for the preservation of contemporary artworks and design objects made of plasticized polyvinyl chloride (p-PVC). Several coatings incorporating chitosan, collagen, and cellulose ethers were assessed as potential barriers to inhibiting plasticizer migration. Analytical techniques including optical microscopy (OM), ultraviolet/visible/near-infrared spectroscopy (UV/Vis/NIR), Fourier transform infrared spectroscopy with attenuated total reflection (FTIR-ATR), and scanning electron microscopy (SEM) were utilized to evaluate the optical and chemical stability of selected coating formulations applied to laboratory p-PVC sheet specimens. Subsequently, formulations were tested on a real tangible example of a design object, ©Barbie doll, characterized by the prevalent issue of plasticizer migration. Furthermore, the results obtained with the tested formulations were evaluated by a group of conservators using a tailored survey. Finally, a suitable coating formulation capable of safeguarding plastic substrates was suggested.
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- 2024
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45. Ultra-Processed Foods and Human Health: A Systematic Review and Meta-Analysis of Prospective Cohort Studies
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Vitale, Marilena, Costabile, Giuseppina, Testa, Roberta, D’Abbronzo, Giovanna, Nettore, Immacolata Cristina, Macchia, Paolo Emidio, and Giacco, Rosalba
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- 2024
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46. No-Thing and Causality in Realistic Non-Standard Interpretations of the Quantum Mechanical Wave Function: Ex Nihilo Aliquid?
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Tarozzi, Gino and Macchia, Giovanni
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Cambridge University Press ,Book publishing -- Standards ,Quantum theory -- Physiological aspects ,Science and technology - Abstract
It has been shown that quantum mechanics in its orthodox interpretation violates four different formulations of causality principle endowed with empirical meaning. The present work aims to highlight how even a realistic non-standard interpretation of the theory conflicts with causality in its Cartesian formulation of the principle of the non-inferiority of causes over effects. Such an interpretation, which attributes some form of weak physical reality to the wave function (called empty wave, regarded as a zero-energy wave-like phenomenon), is a sort of precursor of the more recent so-called wavefunction realism. We also discuss a more radical realistic interpretation according to which physical properties can also be assigned to non-metaphysical relative nothing, seen as the simple absence of a particle such as a photon, but not of its corresponding state (no-photon), which is considered real. By interpreting the wave function collapse as a consequence of an interaction with empty waves or of a detection of the no-photon, we will highlight how more real physical effects can derive from lower causes, including relative nothing. Finally, we will show how these interpretations, while violating Cartesian causality in its two variants, do not seem to affect the validity of the principle of a rational explanation that nothing can derive from (absolute) nothing, which does not seem satisfied by the orthodox interpretation., Author(s): Gino Tarozzi [sup.1], Giovanni Macchia [sup.2] Author Affiliations: (1) grid.12711.34, 0000 0001 2369 7670, Department of Pure and Applied Sciences, University of Urbino Carlo Bo, , Urbino, Italy (2) [...]
- Published
- 2023
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47. Modeling dust mineralogical composition: sensitivity to soil mineralogy atlases and their expected climate impacts
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M. Gonçalves Ageitos, V. Obiso, R. L. Miller, O. Jorba, M. Klose, M. Dawson, Y. Balkanski, J. Perlwitz, S. Basart, E. Di Tomaso, J. Escribano, F. Macchia, G. Montané, N. M. Mahowald, R. O. Green, D. R. Thompson, and C. Pérez García-Pando
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Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Soil dust aerosols are a key component of the climate system, as they interact with short- and long-wave radiation, alter cloud formation processes, affect atmospheric chemistry and play a role in biogeochemical cycles by providing nutrient inputs such as iron and phosphorus. The influence of dust on these processes depends on its physicochemical properties, which, far from being homogeneous, are shaped by its regionally varying mineral composition. The relative amount of minerals in dust depends on the source region and shows a large geographical variability. However, many state-of-the-art Earth system models (ESMs), upon which climate analyses and projections rely, still consider dust mineralogy to be invariant. The explicit representation of minerals in ESMs is more hindered by our limited knowledge of the global soil composition along with the resulting size-resolved airborne mineralogy than by computational constraints. In this work we introduce an explicit mineralogy representation within the state-of-the-art Multiscale Online Nonhydrostatic AtmospheRe CHemistry (MONARCH) model. We review and compare two existing soil mineralogy datasets, which remain a source of uncertainty for dust mineralogy modeling and provide an evaluation of multiannual simulations against available mineralogy observations. Soil mineralogy datasets are based on measurements performed after wet sieving, which breaks the aggregates found in the parent soil. Our model predicts the emitted particle size distribution (PSD) in terms of its constituent minerals based on brittle fragmentation theory (BFT), which reconstructs the emitted mineral aggregates destroyed by wet sieving. Our simulations broadly reproduce the most abundant mineral fractions independently of the soil composition data used. Feldspars and calcite are highly sensitive to the soil mineralogy map, mainly due to the different assumptions made in each soil dataset to extrapolate a handful of soil measurements to arid and semi-arid regions worldwide. For the least abundant or more difficult-to-determine minerals, such as iron oxides, uncertainties in soil mineralogy yield differences in annual mean aerosol mass fractions of up to ∼ 100 %. Although BFT restores coarse aggregates including phyllosilicates that usually break during soil analysis, we still identify an overestimation of coarse quartz mass fractions (above 2 µm in diameter). In a dedicated experiment, we estimate the fraction of dust with undetermined composition as given by a soil map, which makes up ∼ 10 % of the emitted dust mass at the global scale and can be regionally larger. Changes in the underlying soil mineralogy impact our estimates of climate-relevant variables, particularly affecting the regional variability of the single-scattering albedo at solar wavelengths or the total iron deposited over oceans. All in all, this assessment represents a baseline for future model experiments including new mineralogical maps constrained by high-quality spaceborne hyperspectral measurements, such as those arising from the NASA Earth Surface Mineral Dust Source Investigation (EMIT) mission.
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- 2023
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48. Comparative Effectiveness of Chemotherapy Alone Versus Radiotherapy-Based Regimens in Locally Advanced Pancreatic Cancer: A Real-World Multicenter Analysis (PAULA-1)
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Alessandra Arcelli, Giuseppe Tarantino, Francesco Cellini, Milly Buwenge, Gabriella Macchia, Federica Bertini, Alessandra Guido, Francesco Deodato, Savino Cilla, Valerio Scotti, Maria Elena Rosetto, Igor Djan, Salvatore Parisi, Gian Carlo Mattiucci, Michele Fiore, Pierluigi Bonomo, Liliana Belgioia, Rita Marina Niespolo, Pietro Gabriele, Mariacristina Di Marco, Nicola Simoni, Johnny Ma, Lidia Strigari, Renzo Mazzarotto, and Alessio Giuseppe Morganti
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pancreatic cancer ,chemotherapy ,stereotactic body radiotherapy ,conventionally fractionated radiotherapy ,chemoradiation ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Different options for locally advanced pancreatic cancer (LAPC) are available based on international guidelines: chemotherapy (CHT), chemoradiation (CRT), and stereotactic body radiotherapy (SBRT). However, the role of radiotherapy is debated in LAPC. We retrospectively compared CHT, CRT, and SBRT ± CHT in a real-world setting in terms of overall survival (OS), local control (LC), and distant metastasis-free survival (DMFS). LAPC patients from a multicentric retrospective database were included (2005–2018). Survival curves were calculated using the Kaplan–Meier method. Multivariable Cox analysis was performed to identify predictors of LC, OS, and DMFS. Of the 419 patients included, 71.1% were treated with CRT, 15.5% with CHT, and 13.4% with SBRT. Multivariable analysis showed higher LC rates for CRT (HR: 0.56, 95%CI 0.34–0.92, p = 0.022) or SBRT (HR: 0.27, 95%CI 0.13–0.54, p < 0.001), compared to CHT. CRT (HR: 0.44, 95%CI 0.28–0.70, p < 0.001) and SBRT (HR: 0.40, 95%CI 0.22–0.74, p = 0.003) were predictors of prolonged OS with respect to CHT. No significant differences were recorded in terms of DMFS. In selected patients, the addition of radiotherapy to CHT is still an option to be considered. In patients referred for radiotherapy, CRT can be replaced by SBRT considering its duration, higher LC rate, and OS rate, which are at least comparable to that of CRT.
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- 2023
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49. Use of a commercial feed supplement based on yeast products and microalgae with or without nucleotide addition in calves
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Aristide Maggiolino, Gerardo Centoducati, Elisabetta Casalino, Gabriella Elia, Tiziana Latronico, Maria Grazia Liuzzi, Luigi Macchia, Geoffrey E. Dahl, Gianluca Ventriglia, Nicola Zizzo, and Pasquale De Palo
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calves ,yeasts ,peripheral blood mononuclear cell ,redox balance ,Dairy processing. Dairy products ,SF250.5-275 ,Dairying ,SF221-250 - Abstract
ABSTRACT: The use of feed additives with antioxidant and immune response modulatory activity could be a useful strategy in suckling calves to reduce morbidity and mortality. This strategy is based on several feed additives tested for these purposes. The aim of the paper is the examination of a commercial feed additive for adult cows for use in calves, with and without nucleotide supplementation. Seventy-five Holstein Friesian male calves were divided in 3 groups, with each calf randomly assigned to a group according to birth order. All calves received 2 L of pooled colostrum within 2 h of birth. The commercial feed supplement group was orally administered with 5 g/head of Decosel (dried brewer's yeast lysate (Saccharomyces cerevisiae), brewer's yeast walls (Saccharomyces cerevisiae), diatoms, spirulina, barley flour, calcium carbonate; Agroteam srl, Torrimpietra, Italy) and the nucleotides + commercial feed supplement group was orally administered with 5 g/head of an additive containing 2.5 g of Decosel and 2.5 g of nucleotides once daily from birth to 25 d. The control group was orally administered 20 mL of fresh water/head once daily. Calves that received the supplement and the nucleotides showed lower rates of protein and metabolizable energy conversion, with longer villi and greater crypt depth in duodenum. Moreover, the commercial feed supplement alone increased antioxidant capacity [2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) and ferric-reducing antioxidant power] in plasma some activity of antioxidant liver enzymes, and peripheral blood mononuclear cell viability after in vitro concanavalin A and H2O2 stimuli. Dietary supplementation with a commercial feed supplement containing yeast products (yeast cell walls and hydrolyzed yeast) and microalgae enhanced the redox balance and gut morphology in calves, allowing calves to improve their immune response, increasing resistance to stress. Moreover, these beneficial effects were strongly potentiated when dietary nucleotides were added to the supplement.
- Published
- 2023
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50. Editorial: Systemic cellular immune responses and immunological biomarkers in emerging and re-emerging viral infections: an evolving landscape
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Iole Macchia, Valentina La Sorsa, and Sonia Moretti
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emerging diseases ,immune response ,viral infection ,circulating biomarkers ,highthroughput methods ,Immunologic diseases. Allergy ,RC581-607 - Published
- 2024
- Full Text
- View/download PDF
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