Revisión de las especies de Hypoxylon propuestas por Spegazzini

Hladki, Adriana I. y Andrea I. Romero, 2006. ?Revisión de las especies de Hypoxylon Bull. propuestas por Spegazzini?. Lilloa 43 (1-2). Se realiza una revisión de trece holotipos, detallando su estado nomenclatural y taxonómico actual. Se sinominiza H. epimyces Speg. con Nemania efusa (Nitschke) Pouzar, se elige como lectotipo de H. dubiosum Speg. el especimen legado por Balansa 2763 y como lectotipo de H. pseudopachyloma Speg. el especimen coleccionado en Slogget-bay; se acepta la especie H. kermesi Speg. escogiendo como neotipo el especimen LPS 2015. Además se amplia el área de distribución de Biscogniauxia capnodes (Berk.) Y. M. y J. D. Rogers para el norte de la Argentina, anteriormente registrada en Tierra del Fuego y Buenos Aires

Contribución al estudio de las Xylariaceae de la República Argentina. III) Nuevos registros del género Xylaria

Hladki, A.I. & A.I. Romero. 2005. Contribución al estudio de las Xylariaceae de la República Argentina. III) Nuevos registros del género Xylaria. Lilloa 42 (1-2). Se amplia el área de distribución de X. anisopleura (Mont.) Fr., X. apiculata Cooke, X. arbuscula Sacc., X. grammica (Mont.) Fr. y X. ianthino-velutina (Mont.) Fr. para el noroeste del país; y de X. curta Fr. para el noroeste y sur de la Argentina. Se describen los teleomorfos y anamorfos obtenidos en cultivo, incluyendo ilustraciones y fotografías

Xylaria berkeleyi (Xylariaceae, Ascomycota) primera cita para la República Argentina

Hladki, Adriana I. y Andrea I. Romero. 2009. Xylaria berkeleyi (Xylariaceae-Ascomycota) primera cita para la República Argentina. Lilloa 46 (1-2). Se cita a Xylaria berkeleyi por primera vez para el país. Se describen los estromas teleomórficos y las características del cultivo en agar-avena, incluyendo ilustraciones y fotografías

Spectrophotometric determination of the deltamethrin

In the province of Corrientes is found highest production of indoor plants from all Argentina, specially in the northeast of this province. This is because the low frequency orthelack of frosts, allowing a lower cost in the production, since heating is not needed. In this type of cultive is commonly used thedeltamethrin, as the result of this, the validation of a simple method comparable with the gas chromatography for the determination of this Pesticide on both, irrigation and consumption water, was studied. In this work, a spectrophotometric method is proposed for the determination of deltamethrin inirrigation water from the area of flower crops located in the Department of Concepción in the province of Corrientes. Deltamethrin solutions in a range from 0,025 to 1 mg/L on irrigation water were prepared. The absorbance spectrum was scanned between 200 and 400 nm. The maximum absorbance was found at 220 nm. A calibration curve in the range from 0.025 to 1 mg/L, responded to A = (0.3246± 0.0224) C + (0.0096 ± 0.0068) with R2 = 0.998. The % RSD was 0.961 indicating good repeatability for the analytical procedure. The accuracy in the recovery experience was 99.0 - 109.6%. The statistical comparison using the t-test and the F-test indicates that there are no significant differences between GC and spectrophotometric methods, with a confidence level of 95%. The specificity and intermediate accuracy tests were satisfactory.Fil: Gimenez, L. I.. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Departamento de Química; ArgentinaFil: Michellod, A. M. M.. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Departamento de Química; ArgentinaFil: Jorge, M. J.. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Departamento de Química; ArgentinaFil: Pila, Andrea Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Modelado e Innovación Tecnológica. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Instituto de Modelado e Innovación Tecnológica; ArgentinaFil: Bordón, Alexander Germán. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Departamento de Química; ArgentinaFil: Profeta, Mariela Inés. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Departamento de Química; ArgentinaFil: Romero, Jorge Marcelo. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Departamento de Química; ArgentinaFil: Jorge, Nelly Lidia. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas Naturales y Agrimensura. Departamento de Química; Argentin

Ten simple rules for aspiring graduate students.

Several supervillains have higher degrees—why don’t you? There can be a variety of reasons for wanting to go to grad school and for applying to a particular school and program. But often, one can only tell apart good and bad reasons from hindsight. Failing at something is perhaps the best way to know what can go wrong and what advice would have been useful when considering graduate school applications.We should know: one of us started graduate school 4 separate times, and another learned what a PhD was only after having started one; lost 2 supervisors before even starting to write her thesis, and yet another accepted a PhD offer from the lab where she was working, without considering any alternatives; finally, one of us had applied to graduate schools for 5 years (with 19 rejections) before finally landing a PhD offer from their dream school. We hope that our hard-earned lessons will help you to avoid some of the pitfalls that we ourselves fell prey to. In this article, we address how to choose a graduate program, how to apply strategically, and some of the key challenges that may arise along the way toward graduate school. Conveniently, our advice can be summarized as 10 simple rules . . . so here they are.The authors acknowledge the support of the Gates Cambridge Trust [AIL], Cancer Research UK [RRG], Alzheimer’s Society [CCN], Merck [CCN], and the Isaac Newton Trust [EG]

Resurrection and emendation of the Hypoxylaceae, recognised from a multigene phylogeny of the Xylariales

A multigene phylogeny was constructed, including a significant number of representative species of the main lineages in the Xylariaceae and four DNA loci the internal transcribed spacer region (ITS), the large subunit (LSU) of the nuclear rDNA, the second largest subunit of the RNA polymerase II (RPB2), and beta-tubulin (TUB2). Specimens were selected based on more than a decade of intensive morphological and chemotaxonomic work, and cautious taxon sampling was performed to cover the major lineages of the Xylariaceae; however, with emphasis on hypoxyloid species. The comprehensive phylogenetic analysis revealed a clear-cut segregation of the Xylariaceae into several major clades, which was well in accordance with previously established morphological and chemotaxonomic concepts. One of these clades contained Annulohypoxylon, Hypoxylon, Daldinia, and other related genera that have stromatal pigments and a nodulisporium-like anamorph. They are accommodated in the family Hypoxylaceae, which is resurrected and emended. Representatives of genera with a nodulisporium-like anamorph and bipartite stromata, lacking stromatal pigments (i.e. Biscogniauxia, Camillea, and Obolarina) appeared in a clade basal to the xylarioid taxa. As they clustered with Graphostroma platystomum, they are accommodated in the Graphostromataceae. The new genus Jackrogersella with J. multiformis as type species is segregated from Annulohypoxylon. The genus Pyrenopolyporus is resurrected for Hypoxylon polyporus and allied species. The genus Daldinia and its allies Entonaema, Rhopalostroma, Ruwenzoria, and Thamnomyces appeared in two separate subclades, which may warrant further splitting of Daldinia in the future, and even Hypoxylon was divided in several clades. However, more species of these genera need to be studied before a conclusive taxonomic rearrangement can be envisaged. Epitypes were designated for several important species in which living cultures and molecular data are available, in order to stabilise the taxonomy of the Xylariales.Fil: Wendt, Lucile. Helmholtz-Zentrum für Infektionsforschung GmbH. Department of Microbial Drugs; Alemania. German Centre for Infection Research; AlemaniaFil: Sir, Esteban Benjamin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Unidad Ejecutora Lillo. Fundación Miguel Lillo. Unidad Ejecutora Lillo; ArgentinaFil: Kuhnert, Eric. Helmholtz-Zentrum für Infektionsforschung GmbH. Department of Microbial Drugs; Alemania. German Centre for Infection Research; AlemaniaFil: Heitkämper, Simone. Helmholtz-Zentrum für Infektionsforschung GmbH. Department of Microbial Drugs; Alemania. German Centre for Infection Research; AlemaniaFil: Lambert, Christopher. Helmholtz-Zentrum für Infektionsforschung GmbH. Department of Microbial Drugs; Alemania. German Centre for Infection Research; AlemaniaFil: Hladki, Adriana I.. Fundación Miguel Lillo. Dirección de Botánica. Instituto de Micologia; ArgentinaFil: Romero, Andrea Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Micología y Botánica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Micología y Botánica; ArgentinaFil: Luangsa-Ard, Janet Jennifer. National Center for Genetic Engineering and Biotechnology; TailandiaFil: Srikitikulchai, Prasert. National Center for Genetic Engineering and Biotechnology; TailandiaFil: Peršoh, Derek. Ruhr-Universität Bochum; AlemaniaFil: Stadler, Marc. Helmholtz-Zentrum für Infektionsforschung GmbH. Department of Microbial Drugs; Alemania. German Centre for Infection Research; Alemani

Microcallis negii (Chaetothyriales, Ascomycota) primer registro para la Argentina y sobre Podocarpus parlatorei

Catania, Myriam del V. y Andrea I. Romero. 2011. “Microcallis negii (Chaetothyriales, Ascomycota) primer registro para la Argentina y sobre Podocarpus parlatorei”. Lilloa 48 (2). Se cita a Microcallis negii por primera vez para Sudamérica y Argentina. Se describen los ascomas peritecioides, sus características macroscópicas y microscópicas; incluyendo ilustraciones. Se aporta información sobre su distribución geográfica y hábita

Micromicetes asociados con corteza y/o madera de Podocarpus parlatorei en la Argentina. VII. Ascomycota, Hysteriales

Catania, Myriam del Valle; Andrea I. Romero. 2010. “Micromicetes asociados con corteza y/o madera de Podocarpus parlatorei en la Argentina. VII. Ascomycota, Hysteriales”. Lilloa 47 (1-2). Se describen e ilustran especies de Glonium, Gloniopsis e Hysterographium sobre corteza y/o madera de Podocarpus parlatorei. Son nuevos registros para el noroeste de la Argentina. Se aporta información actualizada sobre las relaciones teleomorfo-anamorfo, localización geográfica y hábitat

Micromicetes asociados con corteza y/o madera de Podocarpus parlatorei Pilg. en la Argentina. IV. Ascomycetes

Myriam del Valle Catania y Andrea I. Romero. 2008. “Micromicetes asociados con corteza y/o madera de Podocarpus parlatorei Pilg . en la Argen tina . IV. Ascomycetes”. Lilloa 45 (1-2). Se describen e ilustran diez especies de Ascomycetes, sobre madera y/o corteza de Podocarpus parlatorei Pilg. Bertia moriformis (Tode: Fr) de Not. var. latispora, Bertia moriformis (Tode) de Not. var. moriformis, Cosmospora vilior (Starbäck) Rossman & Samuels, Nectria aurantiaca (Tul. & C. Tul.) Jacz., Lewia scrophulariae (Desm.) M. E. Barr & E. G. Simmons, son nuevos registros para la Argentina. Se amplía el área de distribución en nuestro país de las siguientes especies: Capronia coronata G. J. Samuels, Diaporthe aff. eres Nitschke, Diaporthe medusaea Nitschke, Nectria pseudotrichia Berk. & M. A. Curtis y Pleospora helvetica Niessl

Trichoglossum hirsutum var. hirsutum (Pers.) Boud. (Geoglossaceae, Helotiales) un nuevo registro en el Noroeste Argentino

Catania, Myriam del Valle y Andrea I. Romero. 2007. “Trichoglossum hirsutum var. hirsutum (Pers.) Boud. (Geoglossaceae, Helotiales) un nuevo registro en el Noroeste Argentino”. Lilloa 44 (1-2). Se registra por primera vez para la Argentina, en la provincia de Tucumán y Catamarca a Trichoglossum hirsutum var. hirsutum (Pers.) Boud. Se describe, incluyendo ilustraciones y fotografías