Calendario Sesión Circulo Emprendimiento Sesiones 1 al 4

Desarrollo empresarial y creación de empresa

The Badger: Vol. 1 Issue 4

Brock's student newspaper.

Some aspects of the chemistry of 1, 3, 4 - Thiadiazolium salts and related compounds

The work described in this thesis has been divided into seven sections. The first section involves the preparation of N'-acyl-N'-arylN- benzothiohydrazides by the acylation of N'-aryl-N-benzothiohydrazides and is followed by a brief discussion of their possible conformation in solution. The second section deals with the preparation of 1,3,4-thiadiazolium salts by the action of perchloric acid/acetic anhydride on N'-acylN'- aryl-N-benzothiohydrazides and also by the reaction of N'-arylN- benzothiohydrazides with nitriles in an acidic medium. The preparation of 2-methylthio-I,3,4-thiadiazolium methosulfate by methylating the corresponding thione is also described. The third section deals with the reaction of 2-phenyl- and 2-methyl-I,3,4-thiadiazolium salts with alcohols in the presence of base. The stability and spectra of these compounds are discussed. Treatment of the 2-methyl-I,3,4-thiadiazolium salt with base was found to give rise to a dimeric anhydrobase and evidence supporting its structure is given. The anhydrobase could be trapped by a variety of acylating and thioacylating agents before dimerization occurred. In the fourth section, the reaction of N'-acyl-N'-aryl-N-benzothiohydrazides with a variety of acid anhydrides is described. These compounds were found to be identical with those obtained by acylating the anhydrobase. The mass spectral fragmentation of these compounds is described and the anomolous product obtained upon thiobenzoylation of 3-methyl-l-phenyl-pyrazal-5-one is also discussed. The fifth section deals with thioacyl derivatives of the anhydrobase which were prepared by the action of phosphorus pentasulfide upon the oxygen analogues and also obtained as the major product of the reaction of thioacetic acid with compounds related to N'-aryl-N-benzothiohydrazides. The mass spectra and p.m.r. spectra of these compounds are discussed. In the sixth section, the reaction of the 2-methylthio-l,3,4- thiadiazolium salt with active methylene compounds to give acyl and diacyl derivatives of the anhydrobase is described. Some aspects of these compounds are discussed. The seventh section describes the synthesis of ncyanine~' type dyes incorporating the l,3,4-thiadiazole ring and their spectra are briefly discussed.

Second Welland Canal - Book 1, Survey Map 7 - Through Grantham Township

Survey map of the Second Welland Canal created by the Welland Canal Company showing a portion of the Grantham Township. Identified structures associated with the Canal include the floating tow path. The surveyors' measurements and notes can be seen in red and black ink and pencil. Local area landmarks are also identified and include streets and roads (ex. Road to Port Dalhousie, and Road to St. Catharines), Georges Point, Browns Island, and an unnamed island. Properties and property owners of note are: Concession 2 Lots 21 and 22, Concession 3 Lots 21 and 22, John Clark, C. May, George May, and J. R. Tenbroeck.

The War, 18 July 1812 (vol. 1, no.4) - Newspaper

Volumes of interest were published between 1812 and 1815 with articles about the War of 1812.

Parasitosis y desnutrición en niños de 1 a 4 años en la comunidad de Pueblo Nuevo, Apodaca, Nuevo León

Tesis (Maestría en Salud Pública con Especialidad en Nutrición Comunitaria) UANL.

Relación entre la evolución de la curva ponderal de niños de 1 a 4 años de edad y su respuesta al tratamiento antiparasitario a base de planta local y farmacológico Matlapa, Tamazunchale, San Luis Potosí, México [por] Marie Lourdes Dennery Museau

Tesis (Maestría en Salud Pública con Especialidad en Nutrición Comunitaria) U.A.N.L.

Análisis multifactorial de la participación popular comunitaria de la mujer investigación realizada en los sectores 1 y 4 de la colonia San Gilberto, Santa Catarina, N.L. por Ma. Elena Zamora González

Tesis (Maestría en Trabajo Social) U.A.N.L.

L'Action universitaire – vol. 1, no 4, mars 1935

Pour toute demande de reproduction de contenu se trouvant dans cette publication, communiquer avec l’Association des diplômés de l’UdeM.

Monolithic fused 1 x 4 couplers with high uniformity

A new method for the fabrication of high uniformity monolithic 1 x 4 single mode fused coupler is described together with details of its performance in terms of coupling ratio, spectral response and uniformity. The fabricated device exhibits ultra-broadband performance with a port-to-port uniformity of 0.4 dB. The reliability of such couplers is also evaluated and found to have good stability. Moreover, by controlling the process parameters it is possible to control the power remaining in the through put port of the device, which can be used for dedicated non-intrusive network health monitoring.

Monolithic fused 1 x 4 couplers with high uniformity

A new method for the fabrication of high uniformity monolithic 1 x4 single-mode fused coupler is described together with details of its performance in terms of coupling ratio, spectral response and uniformity. The fabricated device exhibits ultra-broadband performance with a port-to-port uniformity of 0.4 dB. The reliability of such couplers is also evaluated and found to have good stability. Moreover, by controlling the process parameters it is possible to control the power remaining in the through put port of the device, which can be used for dedicated non-intrusive network health monitoring

Epistemologia feminista: profunditzant sobre el coneixement situat (Part 1 de 4)

Ponent: Maria Puig de la Bellacasa / Presenta: Víctor Jorquera