Search results for "InSe"
showing 10 items of 3069 documents
The fine structure of colleterial glands in two cockroaches and three termites, including a detailed study of Cryptocercus punctulatus (Blattaria, Cr…
2007
1873-5495 (Electronic) Journal Article Research Support, U.S. Gov't, Non-P.H.S.; The colleterial glands of insects are organs associated with the female genital apparatus. In cockroaches, these glands produce secretions that cover two parallel rows of eggs during oviposition, and in oviparous species, these secretions become the tanned, sculpted, rigid outer casing of the ootheca. The goal of this study was to compare the gross anatomy of the colleterial glands and the ultrastructure of their component tubules in the phylogenetically significant genera Cryptocercus (Blattaria) and Mastotermes (Isoptera). Recent studies indicate that cockroaches in the genus Cryptocercus are the sister group…
Performance of Host-Races of the Fruit Fly,Tephritis conuraon a Derived Host Plant, the Cabbage ThistleCirsium oleraceum: Implications for the Origin…
2008
The thistle-infesting fruit fly Tephritis conura Loew (Diptera: Tephritidae) forms host races on the melancholy thistle, Cirsium hetewphyllum (L.) Hill (Asterales: Asteraceae) and the cabbage thistle, Cirsium olemceum (L.). Scop. Previous research indicates that the host shift occurred from C. hetewphyllum to C. oleraceum. In this paper we address whether the host shift involved physiological adaptations by studying oviposition acceptance and survival of the two host races on the derived host C. oleraceum. Performance differed significantly between host races. T. conura originating from C. oleraceum produced adults in 75% of all egg-laying trials in contrast to only 6.6% in T. conura origin…
Gas chromatography/mass spectrometry characterization of historical varnishes of ancient Italian lutes and violin
2007
The organic constituents of historical vanishes from two ancient Italian lutes and a Stradivari violin, kept in the Musée de la musique in Paris, have been characterized using gas chromatography-mass spectrometry. Results have been compared with the chromatograms and mass spectra of recent as well as old naturally aged reference materials. The three historical varnishes analyzed have been shown to be oil varnishes, probably mixtures of linseed oil with resins. Identification of diterpenoids and triterpenoids compounds, and of the resins that may have been ingredients of the varnishes, are discussed in this paper.
Direct Electricity Production from Linseed Oil
2019
Today’s energy industry is currently facing an increasing demand for electricity. Besides to the use of coal, oil and gas, in recent years renewable energy sources have also are used. One of devices using renewable energy sources is fuel cell (FC). The most commonly used fuel for fuel cells is hydrogen. But, problems with storage of this fuel causes, that the finding new fuels for FCs are very desirable. One of these fuels can be linseed oil. Powering high efficiency power sources (like FCs) with renewable fuels (like linseed oil) will allow development of renewable energy sources and elimination or reduce of toxic substances emissions. The paper presents the research of linseed oil electro…
Analysis of pteridines in Pyrrhocoris apterus (L.) (Heteroptera, Pyrrhocoridae) during development and in body-color mutants
1997
By using thin-layer chromatography (TLC) and high-performance liquid chromatography (HPLC), five different pteridines have been quantified in extracts from Pyrrhocoris apterus: neopterin, isoxanthopterin, isoxantholumazine (violapterin), 7-methylxanthopterin, and erythropterin. Biopterin was also detected using HPLC. Pteridines have been analyzed separately in bodies and eyes of the wild type regarding developmental stage and sex. The pteridine content in both bodies and eyes increased from nymphs to 2-day-old adults. After this period, the concentration of pteridines in the eyes of adults remained approximately constant, while in the bodies isoxantholumazine, 7-methylxanthopterin, and isox…
Application of Potassium Ion Impregnated Titanium Dioxide as Nanocatalyst for Transesterification of Linseed Oil
2018
The current work comprises the investigation of biodiesel production from linseed oil using TiO2 and a potassium L-tartrate monobasic (C4H5KO6)-modified TiO2 nanocatalyst. Different amounts of C4H5KO6 were considered for TiO2 modification. The nanocatalyst TiO2–0.5C4H5KO6 (1:0.5 molar ratio) showed the best conversion rate for biodiesel production. The nanocatalyst was characterized by FTIR, XRD, TEM, BET, and XPS, and the Hammett indicator–benzenecarboxylic acid titration method was used for basicity measurement. The biodiesel was characterized by GC-MS and 1H and 13C NMR. Furthermore, the optimum reaction parameters for transesterification reaction were analyzed, and the yield was determi…
El perfil laboral y educativo de los jóvenes psicólogos
2013
En este trabajo se analiza la inserción ocupacional de una muestra de jóvenes profesionales egresados de la Licenciatura en Psicología. Se trata de una temática de gran relevancia y poco abordada hasta la actualidad Su estudio permite conocer la situación de los jóvenes profesionales hoy y su grado de inserción laboral. Este estudio contribuye a la comprensión de las características propias de un campo profesional singular, con rasgos distintivos. A su vez los datos arrojados tienen un alto grado de trasferencia ya que aportan información para evaluar y repensar la formación actual del Psicólogo en la Argentina, considerando sus fortalezas y debilidades, analizando los logros y las deudas p…
Diseño e implementación de talleres para la cualificación y el empleo. Una experiencia en formación profesional
2018
En esta comunicación se presenta el diseño y desarrollo de diferentes seminarios y talleres para la búsqueda de empleo implementando estrategias de trabajo en equipo. Asumimos que las instituciones educativas tienen que acercar al alumnado en formación al mundo empresarial dotándoles de herramientas para la búsqueda de empleo 2.0 Pretendemos los siguientes objetivos: fomentar el desarrollo de habilidades y potencialidades de los alumnos para que puedan gestionar su propia carrera profesional; Mejorar el perfil profesional del alumnado y sus oportunidades de inserción laboral; Promover la reflexión del alumnado sobre sus propias capacidades y expectativas; y, conocer las diferentes opciones …
Las empresas de inserción como espacios educativos: Las prácticas de acompañamiento en el puesto de trabajo
2017
El objetivo de la comunicación es mostrar el marco general del estudio denominado “Procesos de formación, acompañamiento, cualificación y desarrollo personal en empresas de inserción: innovación en la inclusión social desde el empleo” (EDU2013-45919-R, EMPLEA). La investigación parte del concepto de las empresas de inserción como empresas del tercer sector que promueven procesos formativos intencionales de carácter formal e informal de personas que salen de procesos de exclusión social. El objetivo principal del proyecto es conocer las prácticas de acompañamiento en el puesto de trabajo y sus efectos sobre los procesos de desarrollo personal, formativo y profesional de las y los trabajadore…
La formazione degli insegnanti della scuola secondaria di secondo grado per orientare gli studenti alla scelta formativo-professionale post-diploma
2022
I professionisti dell’orientamento non sono gli unici attori chiamati a intervenire nei processi decisionali delle persone più giovani: gli insegnanti, proprio perché sono quotidianamente in contatto diretto con gli alunni in classe, possono intervenire in loro favore aiutandoli nel delicato processo di sviluppo personale e professionale. Per questo motivo è descritto inizialmente il quadro teorico della didattica orientativa, (l’orientare insegnando), per poi enunciare subito dopo le esigenze formative specifiche di un insegnante che voglia realizzare in classe la dimensione orientativa dell’attività docente. L’insegnante che vuole orientare i suoi alunni ha bisogno sia di una formazione t…