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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
321

Characterisation of starches isolated from Arracacha xanthorriza, Canna edulis and Oxalis tuberosa and extracted from potato leaf /

Santacruz, Stalin, January 2004 (has links) (PDF)
Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniversitet, 2004. / Härtill 5 uppsatser.
322

Dosimetry in brachytherapy : application of the Monte Carlo method to single source dosimetry and use of correlated sampling for accelerated dose calculations /

Hedtjärn, Håkan January 2003 (has links) (PDF)
Diss. (sammanfattning) Linköping : Univ., 2003. / Härtill 4 uppsatser.
323

Isparta'da okul çağı çocuklarda florozis ve iyot durumunun tiroid volümüne etkisi /

Kutlucan, Ali. Tamer, Mehmet Numan. January 2007 (has links) (PDF)
Tez (Tıpta Uzmanlık) - Süleyman Demirel Üniversitesi, Tıp Fakültesi, İç Hastalıkları Anabilim Dalı, 2007. / Kaynakça var.
324

Investigating chemical change in the laboratory : a curriculum resource for introductory chemistry teachers based on the synthesis, decomposition and analysis of zinc iodide /

DeMeo, Stephen. January 1994 (has links)
Thesis (Ed.D.)--Teachers College, Columbia University, 1994. / Includes tables. Typescript; issued also on microfilm. Sponsor: Jean Lythcott. Dissertation Committee: Roger O. Anderson. Includes bibliographical references (leaves 174-186).
325

Photochemical reaction of iodine with ethyl ether, isopentane, ethyl alcohol and propane [I.] II. Electron spin resonance studies of radicals produced in the ethyl halides by Co⁶⁰ gamma irradiation at 77⁰K /

Filseth, Stephen Vincent, January 1962 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1962. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 131-135).
326

L'iode et le xénon dans les magmas : deux comportements différents / Iodine and xenon inside magmas : two different behaviours

Leroy, Clémence 24 May 2016 (has links)
La présence de magmas en profondeur permet de contraindre des processus géologiques passés et actuels. Ces magmas (i.e. liquides silicatés) participent aux cycles géochimiques des éléments volatils comme vecteur de matière.Nous étudions deux éléments volatils complémentaires : l'iode (I), un halogène, et le xénon (Xe), un gaz rare. Leur système radioactif éteint 129I/129Xe (T1/2 = 15.7Ma) est utilisé pour dater les processus hadéens et la formation de l'atmosphère, issu de l'évolution d'un océan magmatique. Or on connait peu le comportement de l'iode et du xénon dans les magmas en profondeur à haute pression et température.Notre protocole expérimental vise l'étude de l'incorporation de l'iode et du xénon et de leur solubilité dans les magmas. Pour étudier l'incorporation, la structure des silicates liquides a été caractérisée par diffraction de rayons X avec des expériences in situ réalisées dans des cellules à enclumes de diamant et dans des presses Paris-Édimbourg. Les teneurs de solubilité de l'iode et du xénon ainsi que l'eau ont été mesurés par les méthodes PIXE et ERDA.À hautes pressions, l'iode possède une forte solubilité (quelques %pds) dans les magmas. Les résultats préliminaires sur son incorporation dans du basalte montrent que l'iode ne formerait pas des liaisons covalentes. À haute pression et température (T>300°C - P>1GPa), le xénon forme une liaison covalente Xe-O avec les oxygènes des anneaux de 6 tétraèdres SiO44-. Le xénon a une solubilité élevée dans les magmas (4pds% - 1600°C - 3.5GPa).Les modèles de datation et des cycles géochimiques de l'iode et du xénon doivent être revus en tenant compte de leur comportement différentiel dans les magmas. / The presence of magmas at depth helps to constrain past and actual geological processes. Magmas (i.e. silicate melts) participate in geochemical cycles of volatile elements, as vectors of chemical transfers. We study two complementary volatile elements: iodine (I), a halogen, and xenon (Xe), a noble gas. Their extinct 129I/129Xe isotopic system (half-life of 15.7Ma) is used to date Hadean processes and Earth’s atmosphere formation since the atmosphere originated from the Magma Ocean’s evolution. However, little is known about the behavior of both iodine and xenon in silicate melts at depth, under HT and HP conditions. Our experimental protocol aims at elucidating the incorporation process of xenon and iodine in silicate melts, and their solubility. To understand the incorporation of iodine and xenon in magmas, the structure of silicate melts was investigated by in situ diamond anvil cells and Paris-Edinburgh press experiments coupled with X-ray diffraction characterization. Iodine and xenon’s solubility, along with water content are obtained by PIXE and ERDA methods using a nuclear microprobe. At high pressure, iodine has a high solubility (about few wt.%) in magmas. Preliminary results on iodine incorporation in basaltic melt show an absence of covalent bond. At high pressure and temperature conditions (T>300°C – P>1GPa), xenon forms a Xe-O covalent bond with the oxygens of the 6-membered-rings of the melt network. Its solubility in silicate melts is also high (about 4wt.% in haplogranite melts at 1600°C and 3.5GPa). Considering the xenon and iodine differential behavior in melts at depth, a revision of dating models in xenon and iodine cycles must be considered.
327

Marcacao, distribuicao e estudo cinetico da benziodarona com I-131 em ratos da linhagem Wistar

SHIMIZU, SANAE 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:23:16Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:56:08Z (GMT). No. of bitstreams: 1 01036.pdf: 919968 bytes, checksum: 8432333a9ebb3f09ef6cf9cbf84c9622 (MD5) / Dissertacao (Mestrado) / IEA/D / Instituto de Biociencias, Universidade de Sao Paulo - IB/USP
328

Studium chemického kyslík-jodového laseru s produkcí atomárního jodu z plynných sloučenin / Study of the Chemical Oxygen-iodine Laser with the production of atomic iodine from gaseous compounds

Picková, Irena January 2014 (has links)
This work deals with the study of dissociation of iodine molecule for Chemical and Discharge Oxygen-Iodine Laser. Chemical way of HI dissociation and discharge way of dissociation of CH3I and CF3I molecules is examined. Main diagnostics method is absorption spectroscopy. Part of the work is also the modeling of system of chemical reactions. Last part of this work is dealing with the study of plasma generated by the radiofrequency generator in the hollow cathode plasma jet system using argon or mixture of argon with iodine. Diagnostic method used is Langmuir probe.
329

Nouvelle structure BINOL-Maléimide. Applications en catalyse d'oxydation asymétrique / New Structure BINOL-Fused Maleimide. Applications in Catalysed Asymmetric Oxidations.

Brenet, Simon 18 November 2013 (has links)
Les réactions asymétriques catalysées constituent une approche élégante au problème de l'introduction de centres stéréogène pour la synthèse de molécules complexes. Dans ce contexte, les oxydations sont notables de par la possibilité de créer en une seule étape à la fois le centre asymétrique ainsi que les fonctions dont les réactivités sont à la base des méthodologies de synthèse. La sélectivité d'un catalyseur est le plus souvent contrôlée par sa structure même. Notre groupe étudie les oxydations aérobies asymétriques par activation C-H par des analogues chiraux du N-hydroxyphtalimide (NHPI). Nous avons développé une nouvelle structure de catalyseur comportant un cœur BINOL-maléimide afin de dépasser les limitations intrinsèque des précédentes générations de catalyseurs. La première série n'a pas montré d'énantiosélectivité, cela nous a conduit a synthétiser une deuxième série dont les caractéristiques permettraient d'améliorer l'efficacité de ces catalyseurs d'oxydation aérobie asymétrique. Le développement d'un analogue portant deux iodes nous a conduit à étudier cette structure en tant que cœur de catalyseurs à base d'iode hypervalent. Nous avons analysé trois séries de ces catalyseurs pour l'oxytosylation de cétones prochirales et montré que notre structure est comparable avec celles présentées dans la littérature. / Catalysed asymmetric reactions are an elegant approach towards the synthesis of complex molecules for the controlled introduction of stereocenters. Within this field, oxidations are noteworthy since they allow to create in one step both the stereogenic elements and the moieties whose reactivities are the cornerstone of the methodologies of synthesis. The selectivity of a catalyst is most often controlled by its own structure. Our group has investigated catalysed asymmetric aerobic oxidations by C-H activation through the use of chiral analogues of N-hydroxyphtalimide (NHPI). We have developed a new structure of catalyst based upon a BINOL-fused maleimide core to circumvent the inherent limitations of previous catalysts generations. The first series showed no enantioselectivity and led us to synthesize a second series whose features are expected to improve the overall efficiency of those catalysts for asymmetric aerobic oxidations. The development of an analogue bearing two iodine moieties prompted us to study this structure as a core for chiral hypervalent organo-iodine(lll) catalysts. We have investigated three series of such catalysts for the asymmetric α-oxytosylation of prochiral ketones and showed that our structure is comparable with the ones found in the literature.
330

Sledování aktivity štítné žlázy u koz / Monitoring of thyroid activity in goats

BENDOVÁ, Markéta January 2015 (has links)
This thesis deals with the activity of a thyroid gland of a goat in terms of an excessive iodine excretion in urine and milk. The milk iodine content as a potential source of iodine for humans is still a significant affair. Five milk collections were done in five observed farms during a lactation period. It was collected 144 individual mixed milk samples from 32 animals in total. Urine collections were made five times in the five observed farms 29 individual urine samples in total from 12 animals. The total iodine excretion in milk and urine was set. The average iodine content in milk of individual farms ranged from 41.72 to 143.54 ?g I.l-1 and the average iodine content in urine of individual farms ranged from 104,1 to 165,3 ?g I.l-1. It appears from that that type of stabling and also ration with mineral supplements have an impact on the iodine content. No impact on the iodine content was registered from lactation stage, age or specific breed. There's possible dependency on iodine content in milk and iodine content in urine.

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