74 research outputs found

    Parasitoids (Hymenoptera) of leaf-spinning moths (Lepidoptera) feeding on Vaccinium uliginosum L. along an ecological gradient in central European peat bogs

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    Parasitoids of leaf-spinning Lepidoptera associated with two isolated central European peat bogs were investigated. Five families of parasitoid Hymenoptera (Braconidae, Ichneumonidae, Eulophidae, Pteromalidae and Encyrtidae) were recorded. Three categories were recognised: (1) primary parasitoids, (2) facultative hyperparasitoids and (3) obligatory hyperparasitoids. Ten species of Braconidae, five species and seven marked morphospecies among Ichneumonidae, and three species of Chalcidoidea were identified. Despite of some niche-specific (but less host-specific) parasitoids, all these hymenopterans are likely to be generalists and none of them were confirmed to be habitat and/or host specialists. Unlike their eurytopic (opportunistic tyrphoneutral) parasitoids, the Lepidoptera hosts associated with peat bogs are partially highly stenotopic (tyrphobionts and tyrphophiles). The occurrence of parasitoids compared to their potential hosts was structured along an ecological (mesoclimatic) gradient, so most parasitoids were recorded from margins while stenotopic (narrow habitat adaptation) moths were mostly distributed near the centre of the bog habitat

    Apanteles laspeyresiellus (Hymenoptera: Braconidae), a new record for Iran insect fauna

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    این تحقیق در سال 1385 به منظور شناسایی زنبورهای پارازیتویید لارو‌ کرم گلوگاه انار،Ectomyelois ceratoniae (Zeller) (Lep.: Pyralidae: Phycitinae) در روستای حسن‌آباد واقع در 50 کیلومتری جنوب شهر قم انجام شد. در نتیجه‌ی این تحقیق، دو گونه زنبور از خانواده‌ی Braconidae شامل Bracon (Habrobracon) hebetor (Say) و Apanteles laspeyresiellus Papp جمع‌آوری و شناسایی شد که گونه‌ی دوم برای اولین‌بار از ایران گزارش می‌شود

    The first report of Microplitis fulvicornis (Hym.: Braconidae: Microgastrinae) as a parasitoid of Spodoptera exigua (Lep.: Noctuidae) from Iran

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    طی انجام پژوهشی روی جدول زندگی صحرایی شب‌پره Spodoptera exigua (Hübner) در استان خراسان رضوی، زنبور پارازیتوئید Microplitis fulvicornis (Wesmael) متعلق به خانواده Braconidae جمع‌آوری شد. افراد این زنبور از داخل لاروهای سن سوم S. exigua خارج شدند. نام علمی این زنبور توسط نگارنده آخر تأیید شد. این گونه برای اولین‌بار از ایران گزارش می‌شود

    Cardiochiles fallax (Hym.: Braconidae), a new species record for Iran

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    در این تحقیق که در سال 1388 به‌منظور شناسایی زنبورهای پارازیتوئید شب‌پره‌ی دانه‌خوار سویا، Etiella zinckenella (Treitschke) (Lep.: Pyralidae)، در روستای حسن‌آباد استان فارس صورت گرفت، دو گونه زنبور از خانواده‌ی Braconidae شامل‌ Cardiochiles fallax Kokujev و Ascogaster quadridentata Wesmael جمع‌آوری و شناسایی شد که گونه‌ی اول برای اولین بار از ایران گزارش می‌شود. شب‌پره‌ی دانه‌خوار سویا نیز میزبان جدید برای هر دو گونه می‌باشد

    First report of the parasitoid wasps, Microchelonus subcontractus and Bracon intercessor (Hym.: Braconidae), from Iran

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    This paper reports the occurrence of the hymenoterous parasitoids of the beet moth, Scrobipalpa ocellatella Boyd larvae in Iran for the first time. Two braconid species of Microchelonus subcontractus Abdinbekova and Bracon intercessor Nees were collected from the larvae of S. ocellatella in the sugar beet fields located in Ray, the southern district of Tehran. These parasitoids are belonging to the subfamilies Cheloninae and Braconinae, respectively

    Report of the parasitoid wasp, Cotesia plutellae (Hym.: Braconidae), from Iran

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    This paper reports the occurrence of the hymenoterous parasitoid of the diamondback moth larvae in Iran. One species of Braconidae, Cotesia plutellae (Kurdjumov), was collected from larvae of Plutella xylostella (L.) (Lep.: Plutellidae). This parasitoid, which belongs to the subfamily Microgastrinae, is newly recorded from Iran

    INHIBITORII PROLIFERĂRII BACTERIEI BACILLUS CEREUS ÎN BAZA COMPUŞILOR COORDINATIVI AI CUPRULUI(II) CARE CONŢIN 4-FENILTIOSEMICARBAZONA 2-FORMILPIRIDINEI ŞI SULFANILAMIDE

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    Uiniversitatea de Stat de Medicină şi Farmacie “N. Testemiţanu”, Catedra Microbiologie, Virusologie şi Imunologie; Universitatea de Stat din Moldova, Catedra Chimie anorganică.Rezumat Studiul dat se referă la obţinerea unui grup de compuşi coordinativi noi de cupru (II) care conţin 4-feniltiosemicarbazona 2-formilpiridinei şi sulfanilamide şi care manifestă activitate antibacteriană pronunţată faţă de bacteriile din genul Bacillus cereus. Proprietăţile stabilite ale compuşilor nominalizaţi asupra altor tipuri de bacterii gram-pozitive şi gramnegative prezintă oportunitate de utilizare în practica medicală din punctul de vedere al extinderii arsenalului de remedii antimicrobiene, iar complecşii respectivi pot fi utilizaţi şi în cazul altor tulpini de microorganisme rezistente la medicamentele tradiţionale. This paper describes a new group of copper (II) coordinative compounds, containing 4-phenyl thiosemi-carbazone 2-formylpyridine and sulfanilamides with a pronounced antibacterial activity against bacteria of the genus Bacillus cereus and other gram-positive and gram-negative microorganisms, which represents new directions in the development of antibacterial products. Были получены новые координационные соединения меди (II) содержащие 4- фенилтиoсемикарбазон 2-формилпиридина и сульфаниламиды с выраженной антибактериальной активностью по отношению к бактериям рода Bacillus сеreus, а также к другим грамположительным и грамотрицательным микроорганизмам. Выявленные антимикробные свойства позволяют рекомендовать соответствующие комплексы меди (II) с 4- фенилтисемикарбазоном 2-формилпиридина и сульфаниламидами для применения в медицинской практике против резистентных штаммов микроорганизмов

    Diversity and Distribution of Braconidae, a Family of Parasitoid Wasps in the Central European Peatbogs of South Bohemia, Czech Republic

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    An ecological overview of seven years investigation of Braconidae, a family of parasitoid wasps (Hymenoptera: Ichneumonoidea) and a tyrpho-classification of parasitoids in peatbog areas of South Bohemia, Czech Republic are given. A total of 350 species were recorded in investigated sites, but only five tyrphobionts (1.4%) are proposed: Microchelonus basalis, Microchelonus koponeni, Coloneura ate, Coloneura danica and Myiocephalus niger. All of these species have a boreal-alpine distribution that, in Central Europe, is associated only with peatbogs. Tyrphophilous behaviour is seen in at least four (1.1%) species: Microchelonus pedator, Microchelonus subpedator, Microchelonus karadagi and Microchelonus gravenhorstii; however, a number of other braconids prefer peatbogs because they were more frequently encountered within, rather than outside, the bog habitat. The rest of the braconids (342 species, 97.5%) are tyrphoneutrals, many of them being eurytopic components of various habitats throughout their current ranges. Lists of tyrphobiontic braconids and a brief commentary on species composition, distributional picture of actual ranges, and parasitoid association to bog landscape are provided. Being true refugial habitats for populations in an ever-changing world, peatbogs play a significant role in harboring insect communities

    The platelet receptor CLEC-2 blocks neutrophil mediated hepatic recovery in acetaminophen induced acute liver failure

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    Acetaminophen (APAP) is the main cause of acute liver failure in the West. Specific efficacious therapies for acute liver failure (ALF) are limited and time-dependent. The mechanisms that drive irreversible acute liver failure remain poorly characterized. Here we report that the recently discovered platelet receptor CLEC-2 (C-type lectin-like receptor) perpetuates and worsens liver damage after toxic liver injury. Our data demonstrate that blocking platelet CLEC-2 signalling enhances liver recovery from acute toxic liver injuries (APAP and carbon tetrachloride) by increasing tumour necrosis factor-α (TNF-α) production which then enhances reparative hepatic neutrophil recruitment. We provide data from humans and mice demonstrating that platelet CLEC-2 influences the hepatic sterile inflammatory response and that this can be manipulated for therapeutic benefit in acute liver injury. Since CLEC-2 mediated platelet activation is independent of major haemostatic pathways, blocking this pathway represents a coagulopathy-sparing, specific and novel therapy in acute liver failure
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