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Improved Peptidyl Linkers for Self-Assembly of Semiconductor Quantum dot Bioconjugates

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Nano Research 2009年第2期2卷 121-129页

作者： Lorenzo Berti paola Serena d'Agostino Kelly Boeneman Igor L.Medintz CNR-INFM National Research Center on nanoStructures and bioSystems at Surfaces(S3)Via Campi213/A 41100 ModenaItaly University of California davis Medical Center SacramentoCA 95817USA Center for Bio/Molecular Science and Engineering Code 6900 U.S.Naval Research LaboratoryWashingtonDC 20375USA

We demonstrate improved peptide linkers which allow both conjugation to biomolecules such as dNA and self-assembly with luminescent semiconductor quantum dots.A hexahistidine peptidyl sequence was generated by standard solid phase peptide synthesis and modified with the succinimidyl ester of iodoacetamide to yield a thiol-reactive iodoacetyl polyhistidine *** reactive peptide was conjugated to dye-labeled thiolated dNA which was utilized as a model target *** gel electrophoresis and fluorescence resonance energy transfer analysis confirmed that the linker allowed the dNA to self-assemble with quantum dots via metal-affinity driven *** contrast to previous peptidyl linkers that were based on disulfide exchange and were thus labile to reduction,the reactive haloacetyl chemistry demonstrated here results in a more stable thioether bond linking the dNA to the peptide which can withstand strongly reducing environments such as the intracellular *** thiol groups occur naturally in proteins,can be engineered into cloned proteins,inserted into nascent peptides or added to dNA during synthesis,the chemistry demonstrated here can provide a simple method for self-assembling a variety of stable quantum dot bioconjugates.

关键词： Semiconductor quantum dot peptide dNA nanocrystal bioconjugation iodoacetyl sulfhydryl polyhistidine metal-affinity fluorescence fluorescence resonance energy transfer(FRET)

Extreme Cities and Bad Places

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International Journal of disaster Risk Science 2012年第1期3卷 3-10页

作者： paola Viganò department of Urbanism University IUAV of Venice(Istituto Universitario di Architettura di Venezia)30125 VeniceItaly

This article considers places where climate change-induced hazards will be particularly important,focusing on two examples,the lagoon location of Venice and the Garonne riverbank location of Bordeaux. The Venice lagoon territory is close to the coast and has a dispersed form of urban development. Our project experiments resulted in the formulation of a series of adaptation strategies to increased disaster risks,including returning current agricultural land and residential areas to their original state as wetlands and marshes before their reclamation during the early decades of the twentieth century. The scenarios introduce space as a relevant variable into the debate about the impact of climate change and adaptation. This article also deals with the recovery of “bad places,” such as the urban blight on the Garonne riverbanks of Bordeaux,and their relationship with sustainability and disaster risks. Increasingly,the emphasis on minimizing energy consumption and promoting recycling forces cities to reuse places of elevated risk. Only very recently in modern urban planning are polluted and risky areas frequently selected for new development projects to reclaim the vast areas of existing brownfields in the name of sustainability. Integrating disaster risk reduction into a new economic and social context has thus become an extremely important part of contemporary urban design and planning for these reclaimed(bad) areas. The research concludes that urban and territorial design should and can integrate the inevitability of risk. This is necessary for developing approaches and strategies that offer some rethinking about “wicked” problems,long-term time horizons,radical imagination,dynamic representations,and minute territorial readings in contemporary urban planning.

关键词： disaster urban contemporary

Conduction disorder and primary cardiac tumor: a fatal case of multiple lipomas of the right atrium

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Journal of Geriatric Cardiology 2019年第5期16卷 431-433页

作者： Stefano d’Errico Andrea Mazzanti paola Frati Vittorio Fineschi department of Legal Medicine Azienda Ospedaliera Universitaria Sant’Andreavia di GrottarossaRomaItaly Molecular Cardiology Istituti Clinici Scientifici MaugeriIstituto di Ricovero e Cura a Carattere ScientificoPaviaItalyDepartment of Molecular MedicineUniversity of PaviaPaviaItaly department SAIMLAL Sapienza University of RomaViale Regina ElenaRomaItaly

Cardiac primary tumors are uncommon with an estimated prevalence between 0.17%and 0.19%.[1,2]Cardiac lipoma are extremely rare representing only 10%?19%of primary cardiac tumors and only few are symptomatic,depending on their location within the heart.[3,4]They originate from the subendocardium(50%),subepicardium(25%)or myocardium(25%)and with different sizes and locations.[5]Few cases of sudden death due to primary cardiac tumors are reported in literature(0.0025%);in these cases,conductive and haemodinamic abnormalities have been indicated as the cause of death.

关键词： Autopsy Lipoma Primary cardiac tumor Sudden cardiac death

Genetic predisposition to pancreatic cancer

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World Journal of Gastroenterology 2014年第31期20卷 10778-10789页

作者： paola Ghiorzo department of Internal Medicine and Medical Specialties University of Genoa and IRCCS Azienda Ospedaliera Universitaria San Martino-IST Istituto Nazioanle per la Ricerca sul Cancro 16132 Genoa Italy

Pancreatic adenocarcinoma(PC) is the most deadly of the common cancers. Owing to its rapid progression and almost certain fatal outcome, identifying individuals at risk and detecting early lesions are crucial to improve outcome. Genetic risk factors are believed to play a major role. Approximately 10% of PC is estimated to have familial inheritance. Several germline mutations have been found to be involved in hereditary forms of PC, including both familial PC(FPC) and PC as one of the manifestations of a hereditary cancer syndrome or other hereditary conditions. Although most of the susceptibility genes for FPC have yet to be identified, next-generation sequencing studies are likely to provide important insights. The risk of PC in FPC is sufficiently high to recommend screening of high-risk individuals; thus, defining such individuals appropriately is the key. Candidate genes have been described and patients considered for screening programs under research protocols should first be tested for presence of germline mutations in the BRCA2, PALB2 and ATM genes. In specific PC populations, including in Italy, hereditary cancer predisposition genes such as CdKN2 A also explain a considerable fraction of FPC.

关键词： Pancreatic adenocarcinoma Susceptibility genes CdKN2A Melanoma Hereditary cancer syndromes Screening

Geothermal diatoms: Seasonal Variability in the El Tatio Geothermal Field (Altiplano, Chile)

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Advances in Microbiology 2018年第3期8卷 211-234页

作者： Alejandro Angel Irma Vila Carolina díaz Ximena Molina paola Sepúlveda Faculty of Science Universidad de Chile Santiago Chile Laboratorio Ambiental Centro de Ecología Aplicada Santiago Chile

diatom floras were examined in a high-altitude geothermal field, 4200 - 4500 m (29°19'S 68°W'), located in the Central Andean dry Puna ecoregion or southern Altiplano. These locations include hostile environments subjecting living organisms to extreme conditions. The aim of the present study was to investigate the spatial patterns and describe the response of diatom assemblages to differences in physical and chemical variables. different shallow (Achnanthidium exiguum (Grunow) Czarnecki, Cocconeis placentula var. lineata (Ehrenberg) Van Heurck, Eolimna minima (Grunow) Lange-Bertalot, Staurosirella pinnata (Ehrenberg) Williams and Round, Navicula gregaria donkin, Nitzschia inconspicua Grunow, Nitzschia palea (Kützing) Smith, Nitzschia perminuta (Grunow) Peragallo, and Planothidium lanceolatum (Brébisson ex Kützing) Lange-Bertalot. As expected, the 20 to 200 μm-size fraction contained the highest numbers of diatom taxa (53 species), although an unexpectedly high number (47 species) were also found in the smaller 5 to 20 μm-size fraction, more associated to fumaroles and saline systems. The 180 to 2000 μm size fraction contained only two species, including rosette-forming diatom Ulnaria ulna (Nitzsch) Compère, and the unicellular species Surirella chilensis Janisch, both species exclusively reported in freshwater systems. Canonical correspondence analysis (CCA) and Monte Carlo permutation tests showed clear correlations between species, conductivity, TP (total phosphorous), NO3- , HO3- , Mg2+, temperature and dissolved oxygen (dO). The gradient of ionic composition values explaining most variation in diatom assemblages ranged from waters dominated by Ca2+ and SO4- to waters with higher proportions of Na+, K+, F-, Li+, Mg2+ and Cl-. Other factors include substrate type, presence of macrophytes, current velocity and other local environmental conditions. The results presented here enhance our understanding of diatom richness/composition in hostile environments from a high

关键词： Canonical Correspondence Analysis Cluster Conductivity Fumaroles Size Fraction

Minimal Free Resolutions of Zero-dimensional Schemes in P1 ×P1

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Algebra Colloquium 2015年第1期22卷 97-108页

作者： paola Bonacini Lucia Marino Universita degli Studi di Catania ViMe A. Doria 6 95125 Catania Italy

Let X be a zero-dimensional scheme in p1 × p1. Then X has a minimal free resolution of length 2 if and only if X is ACM. In this paper we determine a class of reduced schemes whose resolutions, similarly to the ACM case, can be obtained by their Hilbert functions and depend only on their distributions of points in a grid of lines. Moreover, a minimal set of generators of the ideal of these schemes is given by curves split into the union of lines.

关键词： resolution Hilbert function separators

Plant virus-derived siRNAs“turn on”broad-spectrum plant immunity in wheat

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Molecular Plant 2021年第7期14卷 1038-1040页

作者： paola Leonetti Vitantonio Pantaleo department of Biology Agricultural and Food SciencesInstitute for Sustainable Plant ProtectionBari UnitCNRBari 70126Italy

Viruses are the most abundant biological entities on Earth and the major carriers of disease and mortality as well as the drivers of global *** plant viruses potentially influence global processes is an emergent issue,particularly for their putative implications in *** infection and spread,plant viruses are capable of reprogramming host gene expression via RNA silencing by releasing viral suppressors of RNA silencing,viral small interfering RNAs(vsiRNAs),and by inducing the production of viral-associated small interfering RNAs(va-siRNAs).Recently,studies on various crop-virus pathosystems suggest that RNA silencing suppressors(RSSs)。

关键词： immunity mortality releasing

Thermal survival limits of young and mature larvae of a cold stenothermal chironomid from the Alps （diamesinae： Pseudodiamesa branickii [Nowicki, 1873]）

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Insect Science 2017年第2期24卷 314-324页

作者： Valeria Lencioni paola Bernabo Section of Invertebrate Zoology and Hydrobiology MUSE-Museo delle Scienze Corso del Lavoro e della Scienza 3 38123 Trento Italy

The threats posed by climate change make it important to expand knowl- edge concerning cold and heat tolerance in stenothermal species from habitats potentially threatened by temperature changes. Thermal limits and basal metabolism variations were investigated in Pseudodiamesa branickii （diptera： Chironomidae） under thermal stress between -20 and 37 ℃. Supercooling point （SCP）, lower （LLTs） and upper lethal temper- atures （ULTs）, and oxygen consumption rate were measured in overwintering young （lst and 2nd instar） and mature （3rd and 4th instar） larvae from an Alpine glacier-fed stream. Both young and mature larvae were freezing tolerant （SCPs = -7.1 ℃ and -6.4 ℃, re- spectively; LLT100 〈SCP and 〉 -20 ℃） and thermotolerant （ULTso = 31.7 ± 0.4, 32.5± 0.3, respectively）. However, ontogenetic differences in acute tolerance were observed. The LLT50 calculated for the young larvae （=-7.4 ℃） was almost equal to their SCP （= -7.1 ℃） and the overlapping of the proportion of mortality curve with the CPIF curve highlighted that the young larvae are borderline between freezing tolerance and freezing avoidance. Furthermore, a lower ULT100 in the young larvae （of ca. 1 ℃）, suggests that they are less thermotolerant than mature larvae. Finally, young larvae exhibit a higher oxygen consumption rate （mgO2/gAFdM/h） at any temperature tested and are overall less resistant to oxygen depletion compared to mature larvae at ≥ 10 ℃. These findings sug- gest that mature larvae enter into a dormant state by lowering their basal metabolism until environmental conditions improve in order to save energy for life cycle completion during stressful conditions.

关键词： basal metabolism glacier-fed streams larval development supercooling point thermotolerance

Binary Operations for the Lattice Structure in a Many-to-Many MatchingModel

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Journal of the Operations Research Society of China 2021年第1期9卷 207-228页

作者： paola Belén Manasero Instituto de Matemática Aplicada San Luis Universidad Nacional de San Luis and CONICETAv.Ejército de los andes 950D5700HHW San LuisArgentina

The lattice structure of the set of stable matchings in many-to-many matching model is well known in *** preferences of the agents are substitutable,this result can be obtained by fixed-point methods,for that purpose an algorithm for finding a fixed-point matching is *** the fixed-point set equals the set of stable matchings,the latter has a lattice structure *** this paper,we consider a many-to-many matching market where the preferences of firms satisfy substitutability and the law of aggregate demand,and workers have responsive *** this many-to-many matching market,we explicitly compute for any pair of stable matchings the least upper bound and the greatest lower bound,without using fixed-point methods.

关键词： Many-to-many matching model Binary operations Lattice structure