LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 753

Search options

  1. Article ; Online: Management of non-ST elevation acute myocardial infarction in frail older adults: revascularization or not?

    Bellini, Beatrice / Di Marco, Maurizio / Tonelli, Francesca / Torres, Alessandra / Zoncapè, Mirko

    Internal and emergency medicine

    2024  Volume 19, Issue 2, Page(s) 561–563

    MeSH term(s) Humans ; Aged ; Frail Elderly ; Myocardial Infarction/therapy ; Coronary Artery Disease ; Non-ST Elevated Myocardial Infarction ; ST Elevation Myocardial Infarction ; Treatment Outcome ; Percutaneous Coronary Intervention ; Myocardial Revascularization
    Language English
    Publishing date 2024-01-16
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 2454173-4
    ISSN 1970-9366 ; 1828-0447
    ISSN (online) 1970-9366
    ISSN 1828-0447
    DOI 10.1007/s11739-023-03497-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Comparative structural and functional analysis of the glycine-rich regions of Class A and B J-domain protein cochaperones of Hsp70.

    Ciesielski, Szymon J / Schilke, Brenda A / Stolarska, Milena / Tonelli, Marco / Tomiczek, Bartlomiej / Craig, Elizabeth A

    FEBS letters

    2024  

    Abstract: J-domain proteins are critical Hsp70 co-chaperones. A and B types have a poorly understood glycine-rich region ( ... ...

    Abstract J-domain proteins are critical Hsp70 co-chaperones. A and B types have a poorly understood glycine-rich region (G
    Language English
    Publishing date 2024-03-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 212746-5
    ISSN 1873-3468 ; 0014-5793
    ISSN (online) 1873-3468
    ISSN 0014-5793
    DOI 10.1002/1873-3468.14857
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Ancient human colonization explains dung beetle species richness in the Mediterranean and Macaronesian islands

    Tonelli, Mattia / Dellacasa, Marco / Lobo, Jorge M.

    Journal of Biogeography. 2023 Dec., v. 50, no. 12 p.2095-2108

    2023  

    Abstract: AIM: Different hypothesis have been proposed to explain differences in species richness among islands. However, few studies have attempted to compare the explanatory power of multiple hypotheses using a large data set. Here, we analyse how different ... ...

    Abstract AIM: Different hypothesis have been proposed to explain differences in species richness among islands. However, few studies have attempted to compare the explanatory power of multiple hypotheses using a large data set. Here, we analyse how different types of predictors (energetic/climatic, environmental heterogeneity, island biogeography and anthropogenic) affect variation in dung beetle species richness on Mediterranean and Macaronesian islands. LOCATION: Mediterranean and Macaronesian islands. TAXON: Dung beetles. METHODS: Using a large data set of islands (n = 147), we extracted the species richness of dung beetles on each island using 362 bibliographic reference sources. We performed GLMs to analyse the relationship between the species richness of dung beetles and 11 explanatory variables (temperature, evapotranspiration, aridity, area, maximum elevation, connection to continent during LGM, geological origin, distance from continent, nearest continent, years since first human colonization and human density) representing four types of causal hypotheses. We also included as a covariate the number of published papers studying dung beetles as a surrogate of the survey/study effort carried out in each island. RESULTS: GLMs suggest that the years since first human colonization, the number of published papers and island area were the predictors with a higher explanatory capacity. The volcanic character of the islands and the distance from the mainland had some relevance in the case of Scarabaeinae and Geotrupinae, and maximum elevation appeared relevant in the species richness of Scarabaeinae and Aphodiidae. The anthropogenic and island biogeography hypotheses on the variation in species richness were the ones that have the strongest explanatory capacity, regardless of the inclusion of the surrogate of survey effort as a covariate in the models. MAIN CONCLUSIONS: The long history of human movements and agricultural activities has facilitated the colonization of dung beetles and provided trophic resources for their persistence, leading to increased species richness. Thus, the importance of anthropogenic factors in shaping the biodiversity patterns of island biogeography cannot be ignored. These human‐induced influences may play a fundamental role in altering the biogeographic patterns of islands, even overriding the importance of other variables. Consequently, our findings underline the profound impact of historical human actions on islands biodiversity.
    Keywords Scarabaeidae ; biogeography ; data collection ; dry environmental conditions ; dung beetles ; evapotranspiration ; feces ; geographical distribution ; humans ; species richness ; surveys ; temperature
    Language English
    Dates of publication 2023-12
    Size p. 2095-2108.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 188963-1
    ISSN 0305-0270
    ISSN 0305-0270
    DOI 10.1111/jbi.14715
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  4. Article ; Online: Smart contracts software metrics: A first study.

    Tonelli, Roberto / Pierro, Giuseppe Antonio / Ortu, Marco / Destefanis, Giuseppe

    PloS one

    2023  Volume 18, Issue 4, Page(s) e0281043

    Abstract: Smart contracts (SC) are software programs that reside and run over a blockchain. The code can be written in different languages with the common purpose of implementing various kinds of transactions onto the hosting blockchain. They are ruled by the ... ...

    Abstract Smart contracts (SC) are software programs that reside and run over a blockchain. The code can be written in different languages with the common purpose of implementing various kinds of transactions onto the hosting blockchain. They are ruled by the blockchain infrastructure with the intent to automatically implement the typical conditions of traditional contracts. Programs must satisfy context-dependent constraints which are quite different from traditional software code. In particular, since the bytecode is uploaded in the hosting blockchain, the size, computational resources, interaction between different parts of the program are all limited. This is true even if the specific programming languages implement more or less the same constructs as that of traditional languages: there is not the same freedom as in normal software development. The working hypothesis used in this article is that Smart Contract specific constraints should be captured by specific software metrics (that may differ from traditional software metrics). We tested this hypothesis on 85K Smart Contracts written in Solidity and uploaded on the Ethereum blockchain. We analyzed Smart Contracts from two repositories "Etherscan" and "Smart Corpus" and we computed the statistics of a set of software metrics related to Smart Contracts and compared them to the metrics extracted from more traditional software projects. Our results show that generally, Smart Contract metrics have more restricted ranges than the corresponding metrics in traditional software systems. Some of the stylized facts, like power law in the tail of the distribution of some metrics, are only approximate but the lines of code follow a log-normal distribution which reminds us of the same behaviour already found in traditional software systems.
    MeSH term(s) Blockchain ; Software ; Programming Languages
    Language English
    Publishing date 2023-04-12
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0281043
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: State-of-the-art Review on the Antiparasitic Activity of Benzimidazolebased Derivatives: Facing Malaria, Leishmaniasis, and Trypanosomiasis.

    Francesconi, Valeria / Rizzo, Marco / Schenone, Silvia / Carbone, Anna / Tonelli, Michele

    Current medicinal chemistry

    2023  Volume 31, Issue 15, Page(s) 1955–1982

    Abstract: Protozoan parasites represent a significant risk for public health worldwide, afflicting particularly people in more vulnerable categories and cause large morbidity and heavy economic impact. Traditional drugs are limited by their toxicity, low efficacy, ...

    Abstract Protozoan parasites represent a significant risk for public health worldwide, afflicting particularly people in more vulnerable categories and cause large morbidity and heavy economic impact. Traditional drugs are limited by their toxicity, low efficacy, route of administration, and cost, reflecting their low priority in global health management. Moreover, the drug resistance phenomenon threatens the positive therapy outcome. This scenario claims the need of addressing more adequate therapies. Among the diverse strategies implemented, the medicinal chemistry efforts have also focused their attention on the benzimidazole nucleus as a promising pharmacophore for the generation of new drug candidates. Hence, the present review provides a global insight into recent progress in benzimidazole-based derivatives drug discovery against important protozoan diseases, such as malaria, leishmaniasis and trypanosomiasis. The more relevant chemical features and structure-activity relationship studies of these molecules are discussed for the purpose of paving the way towards the development of more viable drugs for the treatment of these parasitic infections.
    MeSH term(s) Humans ; Antiparasitic Agents/therapeutic use ; Antiprotozoal Agents/pharmacology ; Antiprotozoal Agents/therapeutic use ; Antiprotozoal Agents/chemistry ; Malaria/drug therapy ; Trypanosomiasis/drug therapy ; Leishmaniasis/drug therapy ; Benzimidazoles/pharmacology ; Benzimidazoles/therapeutic use
    Chemical Substances Antiparasitic Agents ; Antiprotozoal Agents ; Benzimidazoles
    Language English
    Publishing date 2023-09-16
    Publishing country United Arab Emirates
    Document type Review ; Journal Article
    ZDB-ID 1319315-6
    ISSN 1875-533X ; 0929-8673
    ISSN (online) 1875-533X
    ISSN 0929-8673
    DOI 10.2174/0929867331666230915093928
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Full opening of helix bundle crossing does not lead to NaK channel activation.

    Kurauskas, Vilius / Tonelli, Marco / Henzler-Wildman, Katherine

    The Journal of general physiology

    2022  Volume 154, Issue 12

    Abstract: A critical part of ion channel function is the ability to open and close in response to stimuli and thus conduct ions in a regulated fashion. While x-ray diffraction studies of ion channels suggested a general steric gating mechanism located at the helix ...

    Abstract A critical part of ion channel function is the ability to open and close in response to stimuli and thus conduct ions in a regulated fashion. While x-ray diffraction studies of ion channels suggested a general steric gating mechanism located at the helix bundle crossing (HBC), recent functional studies on several channels indicate that the helix bundle crossing is wide-open even in functionally nonconductive channels. Two NaK channel variants were crystallized in very different open and closed conformations, which served as important models of the HBC gating hypothesis. However, neither of these NaK variants is conductive in liposomes unless phenylalanine 92 is mutated to alanine (F92A). Here, we use NMR to probe distances at near-atomic resolution of the two NaK variants in lipid bicelles. We demonstrate that in contrast to the crystal structures, both NaK variants are in a fully open conformation, akin to Ca2+-bound MthK channel structure where the HBC is widely open. While we were not able to determine what a conductive NaK structure is like, our further inquiry into the gating mechanism suggests that the selectivity filter and pore helix are coupled to the M2 helix below and undergo changes in the structure when F92 is mutated. Overall, our data show that NaK exhibits coupling between the selectivity filter and HBC, similar to K+ channels, and has a more complex gating mechanism than previously thought, where the full opening of HBC does not lead to channel activation.
    MeSH term(s) Ion Channel Gating/physiology ; Ion Channels/chemistry ; Ions ; Protein Conformation
    Chemical Substances Ion Channels ; Ions
    Language English
    Publishing date 2022-11-03
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 3118-5
    ISSN 1540-7748 ; 0022-1295
    ISSN (online) 1540-7748
    ISSN 0022-1295
    DOI 10.1085/jgp.202213196
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Backbone and side chain chemical shift assignment of diisopropyl fluorophosphatase (DFPase) from Loligo vulgaris, an organophosphorus-degrading enzyme.

    Chen, Julian C-H / Tonelli, Marco / Anderson, Penelope / Michalczyk, Ryszard / Blum, Marc-Michael / Williams, Robert F

    Biomolecular NMR assignments

    2023  Volume 17, Issue 1, Page(s) 55–60

    Abstract: NMR chemical shift assignments are reported for backbone ( ...

    Abstract NMR chemical shift assignments are reported for backbone (
    MeSH term(s) Animals ; Loligo/metabolism ; Nuclear Magnetic Resonance, Biomolecular ; Phosphoric Triester Hydrolases/chemistry ; Phosphoric Triester Hydrolases/metabolism ; Organophosphorus Compounds/chemistry ; Organophosphorus Compounds/metabolism
    Chemical Substances diisopropyl-fluorophosphatase (EC 3.1.8.2) ; Phosphoric Triester Hydrolases (EC 3.1.8.-) ; Organophosphorus Compounds
    Language English
    Publishing date 2023-02-10
    Publishing country Netherlands
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2388861-1
    ISSN 1874-270X ; 1874-2718
    ISSN (online) 1874-270X
    ISSN 1874-2718
    DOI 10.1007/s12104-023-10120-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Smart contracts software metrics

    Roberto Tonelli / Giuseppe Antonio Pierro / Marco Ortu / Giuseppe Destefanis

    PLoS ONE, Vol 18, Iss 4, p e

    A first study.

    2023  Volume 0281043

    Abstract: Smart contracts (SC) are software programs that reside and run over a blockchain. The code can be written in different languages with the common purpose of implementing various kinds of transactions onto the hosting blockchain. They are ruled by the ... ...

    Abstract Smart contracts (SC) are software programs that reside and run over a blockchain. The code can be written in different languages with the common purpose of implementing various kinds of transactions onto the hosting blockchain. They are ruled by the blockchain infrastructure with the intent to automatically implement the typical conditions of traditional contracts. Programs must satisfy context-dependent constraints which are quite different from traditional software code. In particular, since the bytecode is uploaded in the hosting blockchain, the size, computational resources, interaction between different parts of the program are all limited. This is true even if the specific programming languages implement more or less the same constructs as that of traditional languages: there is not the same freedom as in normal software development. The working hypothesis used in this article is that Smart Contract specific constraints should be captured by specific software metrics (that may differ from traditional software metrics). We tested this hypothesis on 85K Smart Contracts written in Solidity and uploaded on the Ethereum blockchain. We analyzed Smart Contracts from two repositories "Etherscan" and "Smart Corpus" and we computed the statistics of a set of software metrics related to Smart Contracts and compared them to the metrics extracted from more traditional software projects. Our results show that generally, Smart Contract metrics have more restricted ranges than the corresponding metrics in traditional software systems. Some of the stylized facts, like power law in the tail of the distribution of some metrics, are only approximate but the lines of code follow a log-normal distribution which reminds us of the same behaviour already found in traditional software systems.
    Keywords Medicine ; R ; Science ; Q
    Subject code 005
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  9. Article: Magnetic-Field Dependence of LC-Photo-CIDNP in the Presence of Target Molecules Carrying a Quasi-Isolated Spin Pair.

    Li, Siyu / Yang, Hanming / Hofstetter, Heike / Tonelli, Marco / Cavagnero, Silvia

    Applied magnetic resonance

    2022  Volume 54, Issue 1, Page(s) 59–75

    Abstract: NMR spectroscopy is well known for its superb resolution, especially at high applied magnetic field. However, the sensitivity of this technique is very low. Liquid-state low-concentration photo-chemically-induced dynamic nuclear polarization (LC-photo- ... ...

    Abstract NMR spectroscopy is well known for its superb resolution, especially at high applied magnetic field. However, the sensitivity of this technique is very low. Liquid-state low-concentration photo-chemically-induced dynamic nuclear polarization (LC-photo-CIDNP) is a promising emerging methodology capable of enhancing NMR sensitivity in solution. LC-photo-CIDNP works well on solvent-exposed Trp and Tyr residues, either in isolation or within proteins. This study explores the magnetic-field dependence of the LC-photo-CIDNP experienced by two tryptophan isotopologs in solution upon
    Language English
    Publishing date 2022-10-15
    Publishing country Austria
    Document type Journal Article
    ZDB-ID 1480644-7
    ISSN 1613-7507 ; 0937-9347
    ISSN (online) 1613-7507
    ISSN 0937-9347
    DOI 10.1007/s00723-022-01506-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: The transition to electric vehicles and a net zero economy: A model based on circular economy, stakeholder theory, and system thinking approach

    Demartini, Melissa / Ferrari, Marco / Govindan, Kannan / Tonelli, Flavio

    Journal of Cleaner Production. 2023 Apr. 14, p.137031-

    2023  , Page(s) 137031–

    Abstract: Greenhouse gas emissions and air pollution are major contributors to climate change, causing harm to both the planet and people. Since transportation is a significant source of these emissions, several European countries have implemented plans to switch ... ...

    Abstract Greenhouse gas emissions and air pollution are major contributors to climate change, causing harm to both the planet and people. Since transportation is a significant source of these emissions, several European countries have implemented plans to switch to electric cars and decrease emissions by 2050. However, this transition presents many challenges, including issues with redesigning supply chains, scarcity of raw materials, and impacts on employment, technology, mobility behaviour, and infrastructure. The aim of this study is to develop a model based on system dynamics and agent-based approaches to evaluate effects of the electric and net zero economy transitions on the automotive supply chains and relevant stakeholders. The study incorporates principles of circular economy, stakeholder theory, and system thinking approach. The research considers various stakeholders such as automotive manufacturers, suppliers, and workers, and it explores several operations such as production, de-manufacturing, and end-of-life activities for three types of vehicles: fuel, hybrid, and electric. The results of the model show that a transition towards electric vehicles and a net zero economy is only possible through the implementation of circular economy, which can generate new business opportunities, reductions in raw material consumption, and a resulting increase in competitiveness; however, at the same time, this transition can have several implications for job. Indeed, the EV transition will significantly reduce the number of manufacturing jobs available in the automotive industry due to an increase in automation, fewer moving parts, and simpler engines. Therefore, it is fundamental that companies and policy makers use the results of this study to reduce the negative effects on employment and plan specific programs and policies to support the developing of new skills for workers and favour their relocation in the supply chain (i.e., end of life activities).
    Keywords air pollution ; automation ; circular economy ; climate change ; employment ; fuels ; greenhouse gases ; industry ; infrastructure ; issues and policy ; raw materials ; stakeholders ; supply chain ; transportation ; Electric vehicle ; Net zero economy ; de-manufacturing ; Stakeholder theory ; System thinking ; System dynamics ; Agent based
    Language English
    Dates of publication 2023-0414
    Publishing place Elsevier Ltd
    Document type Article ; Online
    Note Pre-press version
    ISSN 0959-6526
    DOI 10.1016/j.jclepro.2023.137031
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

To top