AXUDAS PARA A CONSOLIDACIÓN E ESTRUTURACIÓN DE UNIDADES DE INVESTIGACIÓN COMPETITIVAS.GRC 2022
| Funding entity | Consellería de Educación |
| Main researches | Carlos Peinador Veira |
| Type | Proyecto Programas Autonomicos |
| Dates | From 01/01/2022 to 20/11/2025 |
| Department | Chemistry |
| Knowledgment area | Organic Chemistry |
| Research | Research group Química molecular y de materiales |
| Research lines | Química orgánica Compuestos organometálicos Síntesis de productos naturales |
| Keywords | Química orgánica Compuestos organometálicos Síntesis de productos naturales |
| Contacto | UDC directory |
| Orcid id0000-0002-9245-0951 ResearcherIDH-9226-2015 Scopus23028497500 | |
This section shows the teaching given in degrees, masters and other officers studies in last 6 years.
| Subject and involved studies | Type | Distance hours | Total hours |
|---|---|---|---|
| Chemicals and Biological Agents | Optional | 0 | 5.5 |
| Chemistry | Core | 0 | 44 |
| Experimental Organic Chemistry | Compulsory | 0 | 60 |
| Final Year Dissertation | Compulsory | 0 | 3 |
| Industrial Safety | Optional | 0 | 10.5 |
| Master's Dissertation | Compulsory | 0 | 5 |
| Medicinal Chemistry | Optional | 0 | 4.5 |
| Occupational Risk Prevention Techniques. Industrial Hygiene | Compulsory | 0 | 21 |
| Subject and involved studies | Type | Distance hours | Total hours |
|---|---|---|---|
|
Chemicals and Biological Agents
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Optional | 0 | 5.5 |
|
Chemistry
Degree in Biology
|
Core | 0 | 44 |
|
Experimental Organic Chemistry
Concurrent Programme of Studies for Degree in Biology and Degree in Chemistry
Degree in Chemistry by the University of A Coruña
|
Compulsory | 0 | 60 |
|
Final Year Dissertation
Concurrent Programme of Studies for Degree in Biology and Degree in Chemistry
Degree in Chemistry by the University of A Coruña
|
Compulsory | 0 | 0.5 |
|
Industrial Safety
Master in Chemistry Research and Industrial Chemistry
|
Optional | 0 | 11 |
|
Master's Dissertation
Master in Chemistry Research and Industrial Chemistry
|
Compulsory | 0 | 11 |
|
Master's Dissertation
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 10.5 |
|
Medicinal Chemistry
Master in Chemistry Research and Industrial Chemistry
|
Optional | 0 | 11 |
|
Occupational Risk Prevention Techniques. Industrial Hygiene
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 21 |
| Subject and involved studies | Type | Distance hours | Total hours |
|---|---|---|---|
|
Chemicals and Biological Agents
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Optional | 0 | 5.5 |
|
Chemistry
Degree in Biology
|
Core | 0 | 44 |
|
Experimental Organic Chemistry
Concurrent Programme of Studies for Degree in Biology and Degree in Chemistry
Degree in Chemistry by the University of A Coruña
|
Compulsory | 0 | 60 |
|
Final Year Dissertation
Concurrent Programme of Studies for Degree in Biology and Degree in Chemistry
Degree in Chemistry by the University of A Coruña
|
Compulsory | 0 | 2.5 |
|
Industrial Safety
Master in Chemistry Research and Industrial Chemistry
|
Optional | 0 | 9 |
|
Master's Dissertation
Master in Chemistry Research and Industrial Chemistry
|
Compulsory | 0 | 5 |
|
Master's Dissertation
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 6 |
|
Medicinal Chemistry
Master in Chemistry Research and Industrial Chemistry
|
Optional | 0 | 9 |
|
Occupational Risk Prevention Techniques. Industrial Hygiene
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 21 |
|
Organic Chemistry 2
Concurrent Programme of Studies for Degree in Biology and Degree in Chemistry
Degree in Chemistry by the University of A Coruña
|
Compulsory | 0 | 20 |
|
Work Placement
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 2 |
| Subject and involved studies | Type | Distance hours | Total hours |
|---|---|---|---|
|
Chemicals and Biological Agents
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Optional | 0 | 8.5 |
|
Chemistry
Degree in Biology
|
Core | 0 | 44 |
|
Industrial Safety
Master in Chemistry Research and Industrial Chemistry
|
Optional | 0 | 9 |
|
Master's Dissertation
Master in Chemistry Research and Industrial Chemistry
|
Compulsory | 0 | 5 |
|
Master's Dissertation
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 3 |
|
Medicinal Chemistry
Master in Chemistry Research and Industrial Chemistry
|
Optional | 0 | 9 |
|
Occupational Risk Prevention Techniques. Industrial Hygiene
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 21 |
|
Organic Chemistry 2
Concurrent Programme of Studies for Degree in Biology and Degree in Chemistry
Degree in Chemistry by the University of A Coruña
|
Compulsory | 0 | 20 |
|
Work Placement
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 2 |
| Subject and involved studies | Type | Distance hours | Total hours |
|---|---|---|---|
|
Chemicals and Biological Agents
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Optional | 0 | 8.5 |
|
Chemistry
Degree in Biology
|
Core | 0 | 44 |
|
Chemistry Laboratory 1
Degree in Chemistry by the University of A Coruña
|
Core | 0 | 60 |
|
Industrial Safety
Master in Chemistry Research and Industrial Chemistry
|
Optional | 0 | 9 |
|
Medicinal Chemistry
Master in Chemistry Research and Industrial Chemistry
|
Optional | 0 | 1 |
|
Occupational Risk Prevention Techniques. Industrial Hygiene
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 21 |
|
Work Placement
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 3 |
| Subject and involved studies | Type | Distance hours | Total hours |
|---|---|---|---|
|
Chemicals and Biological Agents
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Optional | 0 | 8.5 |
|
Chemistry
Degree in Biology
|
Core | 0 | 28 |
|
Chemistry Laboratory 1
Degree in Chemistry by the University of A Coruña
|
Core | 0 | 30 |
|
Experimental Organic Chemistry
Concurrent Programme of Studies for Degree in Biology and Degree in Chemistry
Degree in Chemistry by the University of A Coruña
|
Compulsory | 0 | 120 |
|
Final Year Dissertation
Concurrent Programme of Studies for Degree in Biology and Degree in Chemistry
Degree in Chemistry by the University of A Coruña
|
Compulsory | 0 | 5 |
|
Master's Dissertation
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 6 |
|
Medicinal Chemistry
Master in Chemistry Research and Industrial Chemistry
Master in Investigation Chemistry and Industrial Chemistry
|
Optional | 0 | 9 |
|
Occupational Risk Prevention Techniques. Industrial Hygiene
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 21 |
|
Work Placement
Master´s Degree in Occupational Risk Prevention and Common Risks
|
Compulsory | 0 | 3 |
Defined tutoring by teacher for 2025/2026 academic course.
| Quarter | Day | Site |
|---|---|---|
| 1st quarter |
Monday
10:00 a 13:00 |
Despacho |
| 1st quarter |
Tuesday
10:00 a 13:00 |
Despacho |
| 1st quarter |
Wednesday
10:00 a 13:00 |
Despacho |
| 1st quarter |
Thursday
10:00 a 13:00 |
Despacho |
| 1st quarter |
Friday
10:00 a 13:00 |
Despacho |
| 2nd quarter |
Monday
10:00 a 13:00 |
Despacho |
| 2nd quarter |
Tuesday
10:00 a 13:00 |
Despacho |
| 2nd quarter |
Wednesday
10:00 a 13:00 |
Despacho |
| 2nd quarter |
Thursday
10:00 a 13:00 |
Despacho |
| 2nd quarter |
Friday
10:00 a 13:00 |
Despacho |
Directed or codirected by current teacher since 2013 year.
| Analysis and characterization of polymers and fine chemical products. |
| Evaluation of exposure to chemical agents in metal structure machining and fabrication of metal structures: metals from welding fumes |
| Silicosis and manufacture of quartz aglomerates. Exposure assesment and preventive measures. |
| Analysis and characterization of diallyldimethylammonium chloride and its polymers in a control laboratory. |
| Study and evaluation of chemical and biological risks in the beekeeping sector |
| Methodology and estimation of the carbon footprint for agri-food products. |
| Risks of Exposure to biological and chemical agents in nursing |
| Analysis of the use of natural gas for mobility and electricity generation in explosion engines. Methods of determining the methane number and its meaning. |
| Hygienic risk from exposure to chemical agents in the laboratories of the CICA |
| Reactions of indium(III) organometallics with a,a,a-difluorobromoamides. |
| Study of hygienic risk in a processing plant for skimmed milk powder |
| Research project of decontamination of soils by diesel in the Eptisa construction laboratory. |
| Specific hygienic assessment for chemical agents in the process of labelling in the brewing industry |
| Transition-Metal Catalyzed Cross-Coupling Reactions of α-Bromo Amides. |
| Risk assessment in a service station |
| Transition metal-catalyzed carbon-carbon bond forming reactions. Synthetic applications |
| Metal-catalyzed reactions of organometallics with propargylic esters . |
| Study and risk assessment of Loira Inter, s.l company |
| Crystalline silica in construction materials. Health hazards |
| Health and Safety Plan for the project: "Improving pavement and street lightning at Poblado del Barreiro. Second phase" |
Select merit type and year to query research merits.
AXUDAS PARA A CONSOLIDACIÓN E ESTRUTURACIÓN DE UNIDADES DE INVESTIGACIÓN COMPETITIVAS.GRC 2022
| Funding entity | Consellería de Educación |
| Main researches | Carlos Peinador Veira |
| Type | Proyecto Programas Autonomicos |
| Dates | From 01/01/2022 to 20/11/2025 |
AXUDAS PARA A CONSOLIDACIÓN E ESTRUTURACIÓN DE UNIDADES DE INVESTIGACIÓN COMPETITIVAS.GRC
| Funding entity | Consellería de Cultura, Educación e Ordenación Universitaria |
| Main researches | Carlos Peinador Veira |
| Type | Proyecto Programas Autonomicos |
| Dates | From 01/01/2019 to 20/11/2021 |
El indio como herramienta sintética en reacciones de acoplamiento y en catálisis
| Funding entity | Ministerio de Ciencia, Innovación y Universidades |
| Main researches | Luis Sarandeses da Costa / José Pérez Sestelo |
| Type | Proyecto Programas Nacionales |
| Dates | From 01/01/2019 to 31/12/2021 |
INDIO EN REACCIONES DE ACOPLAMIENTO Y CATALISIS: ESTRUCTURA, REACTIVIDAD Y APLICACIONES SINTÉTICAS
| Funding entity | Ministerio de Economía y Competitividad (MINECO) |
| Main researches | Luis Sarandeses da Costa/José Pérez Sestelo |
| Type | Proyecto Programas Nacionales |
| Dates | From 01/01/2016 to 30/06/2019 |
Axudas para a consolidación e estruturación de unidades de investigación competitivas. Grupo de Química molecular e de materiais. QUIMOLMAT
| Funding entity | Consellería de Cultura, Educación e Ordenación Universitaria |
| Main researches | José M. Quintela López |
| Type | Proyecto Programas Autonomicos |
| Dates | From 01/01/2014 to 31/12/2017 |
Reacciones de organometálicos de indio catalizadas por metales de transición.
| Funding entity | Ministerio de Economía y Competitividad |
| Main researches | Luis Alberto Sarandeses da Costa |
| Type | Proyecto Otros Programas |
| Dates | From 01/01/2010 to 31/12/2012 |
Organometálicos de indio y de oro en reacciones de acoplamiento cruzado: Nuevas estrategias y aplicaciones en síntesis orgánica. Grupos de investigación SUG.
| Funding entity | Consellería de Innovación e Industria |
| Main researches | Luis A. Sarandeses da Costa |
| Type | Proyecto Programas Autonomicos |
| Dates | From 01/01/2010 to 31/12/2010 |
Consolidación e estruturación de grupos de investigación: "Síntese orgánica e química organometálica"
| Type | Proyecto Otros Programas |
| Dates | From 01/01/2009 to 16/12/2009 |
Consolidación e estruturación de grupos de investigación: "Síntese orgánica e química organometálica"
| Funding entity | Dirección Xeral de Investigación, Desenvolvemento e Innovación |
| Type | Proyecto Otros Programas |
| Dates | From 01/01/2008 to 07/11/2008 |
Síntese de novos productos naturais bioloxicamente activos e derivados de interese farmacolóxico.
| Funding entity | Dirección Xeral de Investigación, Desenvolvemento e Innovación |
| Type | Proyecto Otros Programas |
| Dates | From 01/01/2008 to 31/10/2011 |
Compuestos organometálicos de indio en síntesis asimétrica
| Funding entity | MINISTERIO DE EDUCACIÓN Y CIENCIA |
| Main researches | Luis Alberto Sarandeses da Costa |
| Type | Proyecto Otros Programas |
| Dates | From 01/10/2006 to 30/09/2009 |
Compuestos organometálicos de indio en síntesis asimétrica
| Funding entity | MINISTERIO DE EDUCACIÓN Y CIENCIA |
| Main researches | Luis Alberto Sarandeses da Costa |
| Type | Proyecto Otros Programas |
| Dates | From 01/10/2006 to 30/09/2009 |
Nuevas metodologías de síntesis de productos naturales de interés farmacológico: síntesis de neomarinona, barrenacina y lamellarinas.
| Type | Proyecto Otros Programas |
| Dates | From 05/08/2005 to 04/08/2008 |
Nuevas aplicaciones de los Organometálicos de Indio en Síntesis Orgánica
| Funding entity | Comisión Interministerial de Ciencia y Tecnología (CICYT) |
| Main researches | Luis Alberto Sarandeses Da Costa |
| Type | Proyecto Otros Programas |
| Dates | From 15/11/2003 to 14/11/2006 |
Triorganoindium Reagents in Rh-Catalyzed C-H Activation/C-C Cross-Coupling Reactions of 2-Arylpyridines
| Authors | Riveiros, Ricardo, Tato, Ruben, Perez Sestelo, Jose, Sarandeses, Luis A. |
| Journal | Molecules Vol. 23 Num. 7 (pages 1582 to 1593) |
| DOI | https://doi.org/10.3390/molecules23071582 |
Rhodium-Catalyzed Allylic Substitution Reactions Using Indium(III) Organometallics
| Authors | Ricardo Riveiros Santiago, Tato, R., José Pérez Sestelo, Sarandeses, L. A. |
| Journal | EUROPEAN JOURNAL OF ORGANIC CHEMISTRY (pages 3018 to 3023) |
| DOI | https://doi.org/10.1002/ejoc.201200104 |
Rhodium-Catalyzed Conjugate Addition of Arylindium Reagents to a,b-Unsaturated Carbonyl Compounds
| Authors | Rubén Tato, R. Riveiros, José Pérez Sestelo, Sarandeses, L. A. |
| Journal | TETRAHEDRON Vol. 68 (pages 1606 to 1611) |
Cross-coupling reactions of indium organometallics with 2,5-dihalopyrimidines: synthesis of hyrtinadine A
| Authors | Ángeles Mosquera Lamas, Ricardo Riveiros Santiago, José Pérez Sestelo, Luis Alberto Sarandeses da Costa |
| Journal | ORGANIC LETTERS Vol. 10 Num. 17 (pages 3745 to 3748) |
Palladium-catalyzed cross-coupling reactions of triorganoindium reagents with alkenyl halides
| Authors | Ricardo Riveiros Santiago, Lucía Saya Codesal, José Pérez Sestelo, Luis Alberto Sarandeses da Costa |
| Journal | EUROPEAN JOURNAL OF ORGANIC CHEMISTRY Num. 11 (pages 1959 to 1966) |
Synthesis and conformational analysis of new 17?,21-cyclo-22-unsaturated analogues of calcitriol
| Authors | Ricardo Riveiros Santiago, Antonio Rumbo Gómez, Luis Alberto Sarandeses da Costa, Antonio Mouriño Mosquera |
| Journal | JOURNAL OF ORGANIC CHEMISTRY Vol. 72 Num. 15 (pages 5477 to 5485) |
Synthesis of allenes by palladium-catalyzed SN2¿ reaction of indium organometallics with propargylic esters
| Authors | Ricardo Riveiros Santiago, José Pérez Sestelo, Luis Alberto Sarandeses da Costa |
| Journal | SYNTHESIS-STUTTGART Vol. 22 (pages 3595 to 3598) |
Synthesis of two carboxylic haptens for raising antibodies to 25-Hydroxyvitamin D3 and 1á,25-Dihydroxyvitamin D3
| Authors | Juan Carlos Gregorio Pérez, Silvina Eduardo, Luis C. Rodrígues, María A. Regueira, Ramón Fraga, Ricardo Riveiros Santiago, Miguel Anxo Maestro Saavedra, Antonio Mouriño Mosquera |
| Journal | JOURNAL OF STEROID BIOCHEMISTRY AND MOLECULAR BIOLOGY Vol. 103 Num. 3 (pages 227 to 230) |
Palladium-catalyzed cross-coupling reaction of triorganoindium reagents with propargylic esters
| Authors | Ricardo Riveiros Santiago, José Pérez Sestelo, Luis Alberto Sarandeses da Costa |
| Journal | ORGANIC LETTERS Vol. 8 Num. 7 (pages 1403 to 1406) |
Total Syntheses of Amphidinolide T1, T3, T4, and T5
| Authors | Aïsa Christophe, Ricardo Riveiros Santiago, Ragot Jacques, Fürstner Alois |
| Journal | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Vol. 125 Num. 50 (pages 15512 to 15520) |
Total Synthesis of Amphidinolide T4
| Authors | Fürstner Alois, Aïssa, Christoph, R. Riveiros, Ragot Jacques |
| Journal | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION Vol. 41 (pages 4763 to 4766) |
Organometálicos de Indio(III) en Reacciones Catalizadas por Rodio
| Autor | Rubén Tato Rodríguez |
| Director/s | Sarandeses, L.A. Pérez Sestelo, J. Riveiros, R. |
| Scope | Facultade de Ciencias. Universidade da Coruña |
| Qualification | Sobresaliente Cum Laude |
Organometálicos de Indio(III) en Reacciones de Acoplamiento Cruzado: Síntesis de Pirimidinas 2,5-Disustituidas, 1,1'-Binaftilos y 1,2-Ditieniletenos
| Autor | Ángeles Mosquera Lamas |
| Director/s | Sarandeses, L. A. Pérez Sestelo, J. Riveiros, R. |
| Scope | Facultade de Ciencias, Universidade da Coruña |
| Qualification | Apto Cum Laude |
Estereoselectividad de la reacción de acoplamiento cruzado catalizada por paladio entre organometálicos de indio(III) y halogenuros alquenílicos
XXXIV Reunión Bienal de la Real Sociedad Española de Química
National
| Authors | Ricardo Riveiros Santiago, Lucía Saya Codesal, José Pérez Sestelo, Luis Alberto Sarandeses da Costa |
| Place | Santander (España) |
Avances en la química de los organometálicos de indio: desde nuevas reacciones hasta materiales moleculares
XXIV Reunión Bienal de Química Orgánica
International
| Authors | Sarandeses, L. A., José Pérez Sestelo, Martinez, E., R. Riveiros, Rubén Tato, Ángeles Mosquera Lamas, Cristina Pérez Caaveiro |
| Organization | Real Sociedad Española de Química |
| Place | Donostia-San Sebastián (España) |
Rhodium(I)-catalyzed reactions of indium(III) organometallics
IV School on Organometallic Chemistry"Marcial Moreno Mañas"
International
| Authors | Rubén Tato, R. Riveiros, José Pérez Sestelo, Sarandeses, L. A. |
| Organization | Consolider Ingeno 2010 / Orfeo Team CSD2007-00006 |
| Place | Santiago de Compostela (España) |
Rhodium-catalyzed conjugate addition of arylindium reagents to a,b-unsaturated carbonyl compounds
2º Simposio Iberoamericano de Química Orgánica (II SIBEAQO)
International
| Authors | Rubén Tato, R. Riveiros, José Pérez Sestelo, Sarandeses, L. A. |
| Organization | SIBEAQO |
| Place | Santiago de Compostela (España) |
Organometálicos de indio(III) en reacciones de sustitución alílica catalizadas por rodio
XXXII Reunión Bienal de la Real Sociedad Española de Química
National
| Authors | R. Riveiros, Rubén Tato, José Pérez Sestelo, Sarandeses, L. A. |
| Organization | Real Sociedad Española de Química |
| Place | Oviedo (España) |
Proyecto docente para la asignatura "Experimentación en Química Orgánica"
IV Reunión de Innovación Docente en Química (INDOQUIM 2009)
National
| Authors | Martinez, E., Marcos D. García, R. Riveiros, José Pérez Sestelo |
| Organization | UNIVERSIDAD DE BURGOS |
| Place | Burgos (España) |
Synthesis of functionalized 1,1'-binaphtyls by cross-coupling reactions using triorganoindium reagents
9th International Conference on Heteroatom Chemistry
International
| Authors | Ángeles Mosquera Lamas, Miguel A. Pena, R. Riveiros, José Pérez Sestelo, Sarandeses, L. A. |
| Organization | IUPAC |
| Place | Oviedo (España) |
Synthesis of hyrtinadine A by cross-coupling reactions with indium organometallics
2nd EuCheMS Chemistry Congress
International
| Authors | Ángeles Mosquera Lamas, R. Riveiros, José Pérez Sestelo, Sarandeses, L. A. |
| Organization | EuCheMS |
| Place | Turín (Italia) |
Palladium-catalyzed cross-coupling reactions of indium organometallics with pyrimidines. Synthesis of hyrtinadine A
7th Spanish-Italian Symposium on Organic Chemistry (SISOC7)
International
| Authors | Ángeles Mosquera Lamas, R. Riveiros, José Pérez Sestelo, Sarandeses, L. A. |
| Place | Oviedo (España) |
Organometálicos de Indio en Síntesis Orgánica
I Xornadas dos Investigadores Parga Pondal e Ramón y Cajal de Galicia
National
| Authors | Ricardo Riveiros Santiago, Ángeles Mosquera Lamas, José Pérez Sestelo, Luis Alberto Sarandeses da Costa |
| Place | Santiago de Compostela (España) |
Síntesis de alenos por reacción entre organometálicos de indio(III) y esters propargílicos bajo catálisis de paladio
XXI Reunion Bienal de Química Orgánica
National
| Authors | Ricardo Riveiros Santiago, David Rodríguez, José Pérez Sestelo, Luis Alberto Sarandeses da Costa |
| Place | Valladolid (España) |
Transition-metal catalyzed reactions using indium organometallics
2005 International Chemical Congress of Pacific Basin Societies (Pacifichem 2005)
International
| Authors | Luis Alberto Sarandeses da Costa, José Pérez Sestelo, Ignacio Pérez, Miguel A. Pena, David Rodríguez, Lucía Saya, Ricardo Riveiros Santiago |
| Place | Honolulu (Hawai) (Estados Unidos) |
Compuestos organometálicos de indio: una nueva herramienta en síntesis orgánica
VII Reunión Nacional de Electrocerámica
National
| Authors | Luis Alberto Sarandeses da Costa, José Pérez Sestelo, Miguel A. Pena, L. Saya, Ricardo Riveiros Santiago, I. Pérez, D. Rodríguez |
| Place | Teruel (España) |
Academic or management positions held by teacher.