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DIATOMEAS (BACILLARIOPHYCEAE) DE ZONAS ANDINAS DEL NORTE DE CHILE: NUEVA LOCALIDAD GEOGRáFICA PARA HALOROUNDIA SPECIOSA (HUSTEDT) DIAZ ET MAIDANA
Rivera,Patricio; Cruces,Fabiola;
Gayana. Botánica , 2009, DOI: 10.4067/S0717-66432009000200013
Abstract: this note reports the first finding of haloroundia speciosa (hustedt) diaz et maidana (bacillariophyceae) in a sample collected from the salar de aguas calientes, loa province, northern chile (23°30's; 67°33'w). this species is restricted to the andes mountains. comments about its morphological features and geographical distribution in north andean areas are given.
Diatomeas (Bacillariophyceae) de Ambientes Acuáticos de Altura de la Provincia de Catamarca, Argentina II
Maidana,Nora I.; Seeligmann,Claudia;
Bolet?-n de la Sociedad Argentina de Bot??nica , 2006,
Abstract: in this research focusing the diatoms of high topographic wetlands, 14 samples of different freshwater bodies (between 2,420 and 4,240 m a. s. l.) were studied. two hundred and eight infrageneric taxa were identified, 90 of them are new records for the catamarca province. the genera: frankophila and microcostatus and the species achnanthes thermalis var. rumrichorum lange-bertalot; amphora mira krasske; brachysira atacamae hustedt; frankophila similioides lange-bertalot & rumrich; gomphonema punae lange-bertalot & rumrich; haloroundia speciosa diaz & maidana; luticola mollis lange-bertalot & rumrich; mastogloia atacamae hustedt; microcostatus andinus lange-bertalot& rumrich; navicula atacamana patrick; navicula parinacota rumrich & lange-bertalot; planothidium chilense (hustedt) lange-bertalot; staurosira pseudoconstruens (marciniak) lange-bertalot; surirella chilensis var constricta hustedt y surirella wetzellii hustedt are new records for argentina. a new combination is proposed: ulnaria ulna var. constricta.
Diatomeas (Bacillariophyceae) de Ambientes Acuáticos de Altura de la Provincia de Catamarca, Argentina II Diatoms (Bacillariophyceae) from high altitude aquatic environments of Catamarca Province in Argentina. II  [cached]
Nora I. Maidana,Claudia Seeligmann
Boletín de la Sociedad Argentina de Botánica , 2006,
Abstract: En esta contribución al conocimiento de las diatomeas de humedales de altura, se analizaron 14 muestras pertenecientes a distintos cuerpos de agua de la Provincia de Catamarca (Argentina), entre los 2420 y 4240 m s. n. m. Se identificaron 208 taxones infragenéricos de los cuales 90 son nuevas citas para la Provincia de Catamarca. Se mencionan por primera vez para Argentina los géneros: Frankophila y Microcostatus y las especies: Achnanthes thermalis var. rumrichorum Lange-Bertalot; Amphora mira Krasske; Brachysira atacamae Hustedt; Frankophila similioides Lange-Bertalot & Rumrich; Gomphonema punae Lange-Bertalot & Rumrich; Haloroundia speciosa Diaz & Maidana; Luticola mollis Lange-Bertalot& Rumrich; Mastogloia atacamae Hustedt; Microcostatus andinus Lange-Bertalot & Rumrich; Navicula atacamana Patrick; Navicula parinacota Rumrich & Lange-Bertalot; Planothidium chilense (Hustedt) Lange-Bertalot; Staurosira pseudoconstruens (Marciniak) Lange-Bertalot; Surirella chilensis var constricta Hustedt y Surirella wetzellii Hustedt. Además se propone una nueva combinación: Ulnaria ulna var. constricta. In this research focusing the diatoms of high topographic wetlands, 14 samples of different freshwater bodies (between 2,420 and 4,240 m a. s. l.) were studied. Two hundred and eight infrageneric taxa were identified, 90 of them are new records for the Catamarca province. The genera: Frankophila and Microcostatus and the species Achnanthes thermalis var. rumrichorum Lange-Bertalot; Amphora mira Krasske; Brachysira atacamae Hustedt; Frankophila similioides Lange-Bertalot & Rumrich; Gomphonema punae Lange-Bertalot & Rumrich; Haloroundia speciosa Diaz & Maidana; Luticola mollis Lange-Bertalot & Rumrich; Mastogloia atacamae Hustedt; Microcostatus andinus Lange-Bertalot& Rumrich; Navicula atacamana Patrick; Navicula parinacota Rumrich & Lange-Bertalot; Planothidium chilense (Hustedt) Lange-Bertalot; Staurosira pseudoconstruens (Marciniak) Lange-Bertalot; Surirella chilensis var constricta Hustedt y Surirella wetzellii Hustedt are new records for Argentina. A new combination is proposed: Ulnaria ulna var. constricta.
An improvement to an algorithm of Belabas, Diaz y Diaz and Friedman  [PDF]
Lo?c Grenié,Giuseppe Molteni
Mathematics , 2015,
Abstract: In [BDyDF08] Belabas, Diaz y Diaz and Friedman show a way to determine, assuming the Generalized Riemann Hypothesis, a set of prime ideals that generate the class group of a number field. Their method is efficient because it produces a set of ideals that is smaller than earlier proved results. Here we show how to use their main result to algorithmically produce a bound that is lower than the one they prove.
REVIEW: Understanding the Mindanao Conflict (Patricio P. Diaz)  [cached]
Maria Anna Rowena Luz Layador
Kasarinlan : Philippine Journal of Third World Studies , 2004,
Abstract: Review of Understanding the Mindanao Conflict by Patricio P. Diaz.
LEPTOCYLINDRUS MINIMUS GRAN (BACILLARIOPHYCEAE): MORFOLOGIA Y DISTRIBUCION EN CHILE LEPTOCYLINDRUS MINIMUS GRAN (BACILLARIOPHYCEAE): MORPHOLOGY AND DISTRIBUTION IN CHILE  [cached]
Patricio Rivera,Fabiola Cruces,Alejandro Clement
Gayana. Botanica , 2002,
Abstract: Sobre la base de material recolectado en Calbuco, Chiloé, se confirma la presencia en Chile de Leptocylindrus minimus Gran (Bacillariophyceae) Based on material collected in Calbuco, Chiloé, the presence of Leptocylindrus minimus Gran (Bacillariophyceae) in Chile is confirmed
LEPTOCYLINDRUS MINIMUS GRAN (BACILLARIOPHYCEAE): MORFOLOGIA Y DISTRIBUCION EN CHILE
Rivera,Patricio; Cruces,Fabiola; Clement,Alejandro;
Gayana. Botánica , 2002, DOI: 10.4067/S0717-66432002000100002
Abstract: based on material collected in calbuco, chiloé, the presence of leptocylindrus minimus gran (bacillariophyceae) in chile is confirmed
A Checklist of Navicula (Class Bacillariophyceae) of the Philippines  [cached]
Milagrosa Martinez-Goss
Science Diliman , 2001,
Abstract: A unified acocunt of all known diatoms in the genus Navicula, class Bacillariophyceae, of the Philippines from 1886 to 1987 is presented. A total of 226 taxa are listed. Included herewith are the references that originally described or cited the taxon and the ecological/habitat records for each taxon. As much as possible, a list of exsciccata materials is given together with their repository places.
Tratamiento del insulinoma con diazóxido Insulinoma treated with diazoxide  [cached]
M. V. Mateu,F. O. Gonzalez Pardo,A. Cristino,S. Lasdica
Medicina (Buenos Aires) , 2003,
Abstract: Los insulinomas son tumores pancreáticos de las células beta que segregan insulina en cantidad suficiente como para producir hipoglucemia. Habitualmente benignos se manifiestan como adenomas solitarios, y en menor medida como microadenomas múltiples o carcinomas. Con una incidencia anual de un caso por millón de habitantes, generalmente en adultos de más de 30 a os, se localizan con mayor frecuencia en el cuerpo y cola del páncreas. El diagnóstico se realiza sobre la base de los síntomas, la glucemia por debajo de 50mg% y niveles elevados de insulina plasmática y péptido C en ayunas. El mejor método preoperatorio para localizar el tumor es la arteriografía subselectiva del tronco celíaco. La mayoría de los adenomas que no logran evidenciarse por estudios por imágenes se diagnostican durante la cirugía. El tratamiento de elección del insulinoma es la cirugía. Cuando ésta fracasa o se contraindica, se utiliza tratamiento médico con diazóxido. Presentamos un caso de un paciente con un insulinoma que fue tratado médicamente, con excelente respuesta, realizando una actualización de las manifestaciones clínicas, los métodos diagnósticos y las opciones terapéuticas de una enfermedad muy poco frecuente. Insulinomas are islet cell tumors of the pancreas that produce hypoglycemia due to inappropriate insulin secretion. They appear generally as solitary adenomas, and less commonly as multifocal microadenomas or malignant insulinomas. Their incidence is approximately one case per 1 million population per year, and they appear mostly in patients above thirty years old. They are mainly situated in the pancreas tail or body. The diagnosis is based on the symptoms related to hypoglycemia, a blood glucose level under 50mg% and high levels of fast insulin and C-peptide. Selective angiography is the best preoperative procedure to localize the tumor. Occult adenomas, which cannot be represented by preoperative imaging diagnosis, are detectable through intraoperative methods. Primary treatment of insulinoma is surgical resection of the tumor. When it fails or is contraindicated, medical treatment is considered. We present a case of a patient with an insulinoma, who has had excellent response to medical treatment, and we review the clinical manifestations, diagnostic methods and different types of treatment for such a rare disease.
Discusión taxonómica de algunas especies interesantes de los géneros Biddulphia Gray y Triceratium Ehrenberg (Bacillariophyceae)
Ortiz, Maria Consuelo Carbonell;
Boletim do Instituto Oceanográfico , 1980, DOI: 10.1590/S0373-55241980000200016
Abstract: a taxonomic revision of some diatom species of the genera biddulphia gray and triceratium ehrenberg is made. the species are: b. azorica pavillard, b. schroederiana schussnig, b. membranacea cleve. t. formosum brightwell f.formosum, t. formosum f. quadrangularis (hustedt), t. formosum f. quinquelobulata (hustedt), t. shadboltianum greville, t. shadbottianum f. elongata (grunow) hustedt and t. pelagicum (schroder) sournia. these species have poor siliciflcation of the frustules, reduced valvar apendixes and spines or none; these features could be regarded as adaptations to pelagic life. descriptions and microphotographies of the species were made. these biddulphia spp were found to be very close and some morphometric differences in the relation apical axe/pervalvar axe were taken in order to identify them quickly. all forms were found to be more frequent in no rain season and in high salinity waters (36 ‰). for t. formosum f. quadrangularis (hustedt) and t. formosum f. quinquelobulata (hustedt) some explanations were made about its real infrasnecific position, so that t. quadrangulare greville and t. quinquelobutarum greville should be regarded as different species of that forms of t.formosum brightwell. b. azorica pavillard and b. schroederiana schussnig are first reported for the caribbean sea area.
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