293 research outputs found

    Synthesis of Novel Nanoparticles by Using «Europium Instead of Indium in the Conventional CIS Composition for Photovoltaic Application»

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    Eu has been placed instead of In in Cu-In-S2 which is used for CIS solar cells and effect of different capping agents on composition, size, distribution and morphology of the nanoparticles was investigated by scanning electron microscopy equipped with energy dispersive X-ray and transmission electron microscopy with the corresponding selected area electron diffraction pattern. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3530

    Insecticide resistance in Italian populations of Tribolium flour beetles

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    As a consequence of the widespread use of chemical insecticides in the control of insect pests in grain warehouses and in the food industry, insecticide resistance in grain insect pests has greatly increased all over the world. The goal of this work was to investigate insecticide resistance levels in Italian populations of Tribolium castaneum (Herbst) and Tribolium confusum du Val collected in grain and food storage facilities of 18 different localities. Six contact insecticides were tested on seven populations of the red flour beetle and on eleven populations of the confused flour beetle. Topical application bioassays were carried out on adults. Dose-mortality lines were estimated to determine the resistance ratios for each insecticide and population. A Principal Components Analysis (PCA) was performed on a data matrix describing the pattern of occurrence of the RR values of each insecticide across the set of data provided by 18 different sites. In both species, the slopes of LD-lines range within a rather narrow interval with respect to susceptible strains, while the highest RR value can be observed in a population of the confused flour beetle from Molise assayed with deltamethrin. The distribution of the experimental points in the PCA graph suggests that T. castaneum populations were generally more susceptible to malathion, diazinon and pirethrins than the T. confusum populations. RR values obtained in bioassays suggest that insecticide resistance is not a widespread problem in Italian strains of T. castaneum and T. confusum, but there are populations in which the phenomenon exists. An extended monitoring activity could, therefore, be crucially important in adopting proper control measures for pest management

    Difference between invasive alien and native vegetation in trapping beach litter: A focus on a typical sandy beach of W-Mediterranean Basin

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    Beach litter is one of the most pervasive pollution issues in coastal environments worldwide. In this study, we aim to assess the amount and distribution of beach litter on Porto Paglia beach, its entrapment across psammophilous habitats, and whether the invasive Carpobrotus acinaciformis (L.) L.Bolus plays a different role in trapping litter than native vegetation. To this end, two seasonal samplings (in spring and autumn) were conducted using a paired sampling method that considers plots in all coastal habitats with and without C. acinaciformis. Our results confirm that the main beach litter category is plastic, and that its distribution varies across habitats: the white dune seems to play a greater role in trapping and filtering beach litter, reducing its amount in the backdune. A correlation was found between the Naturalness index (N) and the beach litter amount, supporting the finding that invaded habitats trap beach litter better than native ones

    The first record in Italy of Trichogramma cordubense Vargas & Cabello 1985 (Hymenoptera: Trichogrammatidae) emerging from the eggs of Lobesia botrana (Denis & Schiffermüller, 1775) (Lepidoptera: Tortricidae)

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    This study investigated the egg parasitoids of Lobesia botrana (Denis & Schiffermüller, 1775) feeding on Daphne gnidium L. (Malvales, Thymelaeaceae) in the San Rossore-Migliarino-Massaciuccoli Nature Reserve (Tuscany, Italy). Four species of egg parasitoids of the genus Trichogramma spp. were obtained. The parasitization rate gradually increased over the season, reaching its maximum level in September 2015, with a percentage of parasitized eggs close to 55 %. Three of the species obtained were already known as L. botrana parasitoids, whereas the finding of Trichogramma cordubense Vargas & Cabello, 1985 represents the first recording in Italy, as well as the first report of this species among the natural enemies of L. botrana

    Insights on Funeral Practices and Insects Associated with the Tombs of King Ferrante II d'Aragona and Other Renaissance Nobles

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    The impressive Sacristy of the Basilica of San Domenico Maggiore contains 38 wooden sarcophagi with the bodies of 10 Aragonese princes and other Neapolitan nobles, who died in the 15th and 16th centuries. To improve the knowledge about the entomofauna associated with bodies in archaeological contexts, herein we provide insights on the funerary practices and the insect community associated to Ferrante II King of Naples and other Italian Renaissance mummies of the Aragonese dynasty buried in the Basilica of St. Domenico Maggiore. We identified 842 insect specimens: 88% were Diptera (Muscidae, Fanniidae, and Phoridae), followed by 9% Lepidoptera (Tineidae) and 3% Coleoptera (Dermestidae and Ptinidae). Ninety-seven percent of the specimens were collected from the coffin of Francesco Ferdinando d'Avalos, which was the best preserved. A lack of fly species characterizing the first colonization waves of exposed bodies was noted. The most common fly was the later colonizing muscid Hydrotaea capensis (Wiedemann); only a few Fanniidae (Fannia spp.) were retrieved. The lack of blowflies, coupled with recording H. capensis as the dominant fly, supports our hypothesis that corpses have been kept indoors for a long time under confined environmental conditions. Other explanations include odorous oils/balms having been used in the embalming process, causing the delay or stopping the arrival of first colonizer flies. Hermetically sealing of the coffin with bitumen may also have played a role in preventing access to the corpses. This scenario describes a historical context characterized by a well-advanced knowledge of body preparation, with specific burial techniques adopted for nobles

    Obesity across America: Geographic Variation in Disease Prevalence and Treatment Options

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    More than 4 in 10 adults in the US are affected by obesity, defined as experiencing an accumulation of body fat higher than what is considered healthy for a given height. Obesity is associated with increased risks for serious health conditions such as type 2 diabetes, hypertension, stroke, and various cancers. People of all genders, of all races and ethnicities, and in all geographic areas experience obesity.This report examines existing data and research to comprehensively describe the scope and prevalence of obesity and available obesity treatments in the US. We look at the current state-level prevalence of obesity and changes in state-level obesity prevalence from 2011 to 2020. We also examine current county-level obesity prevalence and which counties have the highest and lowest levels of obesity and related comorbidities. Then, we describe insurance coverage for four obesity treatment options (screening and counseling, nutritional counseling, pharmacotherapy, and bariatric surgery) for four insurance plans (fee-for-service Medicaid, Medicaid managed care, state employee health plans, and state essential health benefits benchmark plans)

    Retail Food Access and Obesity Prevalence: Mapping Variation across the United States

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    Obesity has increased rapidly during the last few decades and is a significant risk factor for many chronic diseases, often resulting in higher rates of morbidity and mortality. The role of eating behaviors and individual food choices, as well as the growing array of clinical tools to reduce obesity at the individual level, has received extensive attention as public health researchers seek to understand why the rate of obesity in the US has escalated so rapidly in a relatively short period. But the focus on individual actions and tailored clinical management can obscure how the larger environment shapes the available choices and opportunities, particularly for those in communities where obesity is common. A central feature of that environment is the quality of food access.We explore how access to different types of retail food stores—which may in turn shape the foods that consumers choose—varies widely across the US, with particular attention to areas with higher rates of obesity.

    Braconinae parasitoids (Hymenoptera, Braconidae) emerged from larvae of Lobesia botrana (Denis & Schiffermüller) (Lepidoptera, Tortricidae) feeding on Daphne gnidium L.

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    The Bracon Fabricius, 1804 species, B. admotus Papp, 2000, and three species of the genus Habrobracon Ashmead, 1895, H. concolorans (Marshall, 1900), H. hebetor (Say, 1836) and H. pillerianae Fischer, 1980, were obtained from the larvae of Lobesia botrana (Denis & Schiffermüller, 1775) (Lepidoptera, Tortricidae) living on Daphne gnidium Linnaeus, 1753 (Thymelaeaceae) in the natural reserve of Migliarino-San Rossore- Massaciuccoli (Pisa - Central Italy). Bracon admotus, Habrobracon concolorans and H. pillerianae were found for the first time to be associated with L. botrana, while H. hebetor was reared for the first time from the larvae of Cryptoblabes gnidiella (Milliere, 1867) (Lepidoptera, Pyralidae, Phycitinae). Bracon admotus and H. pillerianae are new fauna to Italy and Western Europe. A key is proposed for the determination of Habrobracon species reared from L. botrana and related Palaearctic species of this genus. Bracon (Habrobracon) lineatellae Fisher, 1968 is considered as a valid species

    Proposal of A New Bois Noir Epidemiological Pattern Related to ‘Candidatus Phytoplasma Solani’ Strains Characterized by A Possible Moderate Virulence in Tuscany

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    Bois noir (BN), associated with 'Candidatus Phytoplasma solani' (CaPsol), is the most widespread disease of the grapevine yellows complex worldwide. In this work, BN epidemiology was investigated in a case study vineyard where an unusual CaPsol strain, previously detected only in other host plants, was found to be prevalent in grapevine. Experimental activities included: symptom observation; sampling of symptomatic vines, Auchenorrhyncha specimens, and weeds; molecular detection and typing of CaPsol strains; statistical analyses for determining possible relationships between CaPsol relative concentration, strain type, and symptom severity. Among insects, Reptalus quinquecostatus was the most abundant and was found to be highly infected by CaPsol, while Hyalesthes obsoletus, the main CaPsol vector, was not caught. Moreover, R. quinquecostatus harbored CaPsol strains carrying uniquely the stamp sequence variant St10, also identified as prevalent in vines and in the majority of weeds, and all the secY variants identified in the vineyard. Statistical analyses revealed that CaPsol strains carrying the St10 variant are not associated with severe symptoms, suggesting their possible moderate virulence. Based on such evidence, a new BN epidemiological pattern related to these CaPsol strains and involving grapevine, R. quinquecostatus, and/or weeds is proposed. Furthermore, the possible presence of other players (vectors and weeds) involved in CaPsol transmission to grapevines was highlighted
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