cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25549/annis-ouc17179899
title: "Santa Teresa - Antigua," with "view from," Antigua, Guatemala, 1934

description: Ruins of the Templo y Convento de Santa Teresa and view from them, Antigua, Sacatepéquez, Guatemala, 1934 August 1, 8, and 10.
DOI: 10.25549/annis-ouc17188794
title: Church in San Pedro Las Huertas, Guatemala, 1966

description: Parroquia de San Pedro Las Huertas, in a village near Antigua, San Pedro Las Huertas, Guatemala, 1966 May.
DOI: 10.25549/annis-ouc17188581
title: Church in San Pedro Las Huertas, Guatemala, 1966

description: Parroquia de San Pedro Las Huertas, in a village near Antigua, San Pedro Las Huertas, Guatemala, 1966 May.
DOI: 10.25549/annis-ouc17186054
title: Church in San Pedro Las Huertas, Guatemala, 1966

description: Parroquia de San Pedro Las Huertas, in a village near Antigua, San Pedro Las Huertas, Guatemala, 1966 May.
DOI: 10.25549/annis-ouc17194618
title: Wharf and town of Panajachel, Guatemala, 1934

description: Panajachel and wharf, Lake Atitlán, Sololá, Guatemala, 1934 August 3 and 21.
DOI: 10.25549/annis-ouc17198173
title: Lake Atitlán and Volcán de Atitlán at Panajachel, Guatemala, 1934

description: The lake and volcano of Atitlán at the town of Panajachel, Sololá, Guatemala, 1934 August 21.
DOI: 10.25549/annis-ouc17197099
title: Hotel Museo Mayan Inn, Chichicastenango, Guatemala, 1945

description: The Mayan Inn, later the Hotel Museo Mayan Inn, Chichicastenango, El Quiché, Guatemala, 1945 April 2.
DOI: 10.25549/annis-ouc17199005
title: Hotel Museo Mayan Inn, Chichicastenango, Guatemala, 1945

description: The Mayan Inn, later the Hotel Museo Mayan Inn, Chichicastenango, El Quiché, Guatemala, 1945 April 2.
DOI: 10.25549/annis-ouc17195130
title: Iglesia de Santo Tomás, Chichicastenango, Guatemala, 1934

description: Catholic church eventually containing the Museo Regional, Chichicastenango, El Quiché, Guatemala, 1934 August 26.
DOI: 10.25549/annis-ouc17179860
title: La Merced Church, Guatemala City, Guatemala, 1934, 1938, & 1965

description: La Merced Church with dome, Guatemala City, Guatemala Department, Guatemala, 1934-07-30/1965.
DOI: 10.25549/annis-ouc17187648
title: "New National Palace of Guatemala, Guatemala City," Guatemala, 1945

description: "Palacio Nacional de la Cultura" of Guatemala, completed in 1943, Guatemala City, Guatemala Department, Guatemala, 1945 July.
DOI: 10.25549/annis-ouc17188373
title: "New public health building, Guatemala City," Guatemala, 1938

description: "New public health building, Guatemala City," Guatemala Department, Guatemala, 1938 April 13.
DOI: 10.25549/annis-ouc17187756
title: "New public health building, Guatemala City," Guatemala, 1938

description: "New public health building, Guatemala City," Guatemala Department, Guatemala, 1938 April 13.
DOI: 10.25549/annis-ouc17183774
title: "University of Guatemala, Guatemala City," Guatemala, 1934 & 1938

description: Views of different areas of the "University of Guatemala, Guatemala City," Guatemala Department, Guatemala, 1934 August 17, 1938 April 13, and 1938 July 29.
DOI: 10.25549/annis-ouc17179113
title: Iglesia de Nuestra Señora del Carmen, Guatemala City, Guatemala, 1934 & 1938

description: Also known as Rectoría Nuestra Señora del Carmen, dedicated in 1814 to succeed the church ruined by the Antigua 1773 earthquake, Guatemala City, Guatemala Department, Guatemala, 1934 August 17 and 1938 April 13.
DOI: 10.25549/annis-ouc17186106
title: Cathedral of Guatemala City, Guatemala, 1934 & 1938

description: Cathedral of Guatemala City, with views from "Caritas del Carmen," Guatemala City, Guatemala Department, Guatemala, 1934 July 29 and 30, and 1938 July 1.
DOI: 10.25549/annis-ouc17186112
title: Cathedral of Guatemala City, Guatemala, 1934 & 1938

description: Cathedral of Guatemala City, with views from "Caritas del Carmen," Guatemala City, Guatemala Department, Guatemala, 1934 July 29 and 30, and 1938 July 1.
DOI: 10.25549/annis-ouc17185369
title: Basilica of Our Lady of the Rosary, Guatemala City, Guatemala, 1934

description: The rebuilt Church of Santo Domingo, Basilica of Our Lady of the Rosary, interiors and one exterior view, Guatemala City, Guatemala Department, Guatemala, 1934 August 17.
DOI: 10.25549/annis-ouc17188815
title: Basilica of Our Lady of the Rosary, Guatemala City, Guatemala, 1934

description: The rebuilt Church of Santo Domingo, Basilica of Our Lady of the Rosary, interiors and one exterior view, Guatemala City, Guatemala Department, Guatemala, 1934 August 17.
DOI: 10.25549/annis-ouc17202946
title: Iglesia de Santo Tomás, Chichicastenango, Guatemala, 1934

description: Catholic church eventually containing the Museo Regional, Chichicastenango, El Quiché, Guatemala, 1934 August 26.
DOI: 10.25549/annis-ouc17194155
title: Iglesia de Santo Tomás and market square, Chichicastenango, Guatemala, 1934

description: The Iglesia de Santo Tomás and the town open market, Chichicastenango, El Quiché, Guatemala, 1934 August 4, 22, and 26.
DOI: 10.25549/annis-ouc17198337
title: Iglesia de Santo Tomás and market square, Chichicastenango, Guatemala, 1934

description: The Iglesia de Santo Tomás and the town open market, Chichicastenango, El Quiché, Guatemala, 1934 August 4, 22, and 26.
DOI: 10.25549/annis-ouc17197095
title: Iglesia de Santo Tomás and market square, Chichicastenango, Guatemala, 1934

description: The Iglesia de Santo Tomás and the town open market, Chichicastenango, El Quiché, Guatemala, 1934 August 4, 22, and 26.
DOI: 10.25549/annis-ouc17196446
title: Iglesia de Santo Tomás and market square, Chichicastenango, Guatemala, 1934

description: The Iglesia de Santo Tomás and the town open market, Chichicastenango, El Quiché, Guatemala, 1934 August 4, 22, and 26.
DOI: 10.25549/annis-ouc17184051
title: Campo Marte, Guatemala City, Guatemala, 1938

description: "Reviewing stand at Campo de Martes [Campo Marte]," showing 3 stories, Guatemala City, Guatemala Department, Guatemala, 1938 July 29.
DOI: 10.25549/annis-ouc17188954
title: Campo Marte, Guatemala City, Guatemala, 1938

description: "Reviewing stand at Campo de Martes [Campo Marte]," showing 3 stories, Guatemala City, Guatemala Department, Guatemala, 1938 July 29.
DOI: 10.15468/dl.uzgg86
title: Occurrence Download

description: A dataset containing 14378 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Achirus",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 14378 records from 158 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001451-260221153910048/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/annis-ouc17182100
title: Chamber of Deputies and Presidential Palace, Guatemala City, Guatemala, 1934 & 1938

description: National government buildings in Guatemala City--the "Chamber of Deputies" and "Presidential Palace," 1934 August 17, 1938 July 1 and 29.
DOI: 10.25549/annis-ouc17182027
title: Chamber of Deputies and Presidential Palace, Guatemala City, Guatemala, 1934 & 1938

description: National government buildings in Guatemala City--the "Chamber of Deputies" and "Presidential Palace," 1934 August 17, 1938 July 1 and 29.
DOI: 10.25549/annis-ouc17185228
title: "National Museum" and Tipografía Nacional, Guatemala City, Guatemala, 1938

description: The museum Tipografía Nacional and an unidentified "National Museum," Guatemala City, Guatemala Department, Guatemala, 1938 July 29.
DOI: 10.25549/annis-ouc17188790
title: Church of San Pedro Las Huertas, Guatemala, 1966

description: Parroquia de San Pedro Las Huertas, in a village near Antigua, San Pedro Las Huertas, Sacatepéquez, Guatemala, 1966 May.
DOI: 10.25549/annis-ouc17184095
title: Church of San Pedro Las Huertas, Guatemala, 1966

description: Parroquia de San Pedro Las Huertas, in a village near Antigua, San Pedro Las Huertas, Sacatepéquez, Guatemala, 1966 May.
DOI: 10.25549/annis-ouc17186462
title: Church of San Pedro Las Huertas, Guatemala, 1966

description: Parroquia de San Pedro Las Huertas, in a village near Antigua, San Pedro Las Huertas, Sacatepéquez, Guatemala, 1966 May.
DOI: 10.15468/dl.gm2z9t
title: Occurrence Download

description: A dataset containing 15848 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Helicopsyche",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 15848 records from 187 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001452-260221153910048/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/annis-ouc17184054
title: Church of San Pedro Las Huertas, Guatemala, 1966

description: Parroquia de San Pedro Las Huertas, in a village near Antigua, San Pedro Las Huertas, Sacatepéquez, Guatemala, 1966 May.
DOI: 10.25549/annis-ouc17189076
title: Church and cross of San Pedro Las Huertas, Guatemala, 1936

description: Parroquia de San Pedro Las Huertas with cross, San Pedro Las Huertas, Sacatepéquez, Guatemala, 1936 June 6.
DOI: 10.25549/annis-ouc17185323
title: "National Museum" and Tipografía Nacional, Guatemala City, Guatemala, 1938

description: The museum Tipografía Nacional and an unidentified "National Museum," Guatemala City, Guatemala Department, Guatemala, 1938 July 29.
DOI: 10.25549/annis-ouc17184593
title: "National Museum" and Tipografía Nacional, Guatemala City, Guatemala, 1938

description: The museum Tipografía Nacional and an unidentified "National Museum," Guatemala City, Guatemala Department, Guatemala, 1938 July 29.
DOI: 10.25549/annis-ouc17188468
title: "Guatemala City airport," Guatemala City, Guatemala, 1938

description: The Guatemala City airport terminal with control tower, Guatemala City, Guatemala Department, Guatemala, 1938 March 23.
DOI: 10.25549/annis-ouc17180910
title: "Guatemala City airport," Guatemala City, Guatemala, 1938

description: The Guatemala City airport terminal with control tower, Guatemala City, Guatemala Department, Guatemala, 1938 March 23.
DOI: 10.25549/annis-ouc17185976
title: "National Post Office" and "National Telegraph Office," Guatemala City, Guatemala, 1938

description: Two buildings, the "National Post Office" and "National Telegraph Office," Guatemala City, Guatemala, 1938 April 13.
DOI: 10.25549/annis-ouc17180484
title: Walls in Guatemala, 1945

description: Walls with no place specified, Guatemala, 1945.
DOI: 10.25549/annis-ouc17187709
title: Views from roof showing Antigua, Guatemala, 1945

description: Panoramic views from the roof of the Iglesia de La Merced showing Antigua, Sacatepéquez, Guatemala, 1945.
DOI: 10.25549/annis-ouc17181023
title: Views from roof showing Antigua, Guatemala, 1945

description: Panoramic views from the roof of the Iglesia de La Merced showing Antigua, Sacatepéquez, Guatemala, 1945.
DOI: 10.25549/annis-ouc17184223
title: Hermitage of the Holy Trinity, Antigua, Guatemala, 1934 & 1938

description: Ruins of the Hermita de la Santísima Trinidad, Antigua, Sacatepéquez, Guatemala, 1934 September 2 and 1938 March 28.
DOI: 10.25549/annis-ouc17187755
title: Church of San Miguel Escobar, Antigua, Guatemala, 1966

description: The church in the Barrio of San Miguel Escobar, Antigua, Sacatepéquez, Guatemala, 1966 May.
DOI: 10.25549/annis-ouc17185612
title: Church and cross of San Pedro Las Huertas, Guatemala, 1936

description: Parroquia de San Pedro Las Huertas with cross, San Pedro Las Huertas, Sacatepéquez, Guatemala, 1936 June 6.
DOI: 10.25549/annis-ouc17186737
title: Church and cross of San Pedro Las Huertas, Guatemala, 1936

description: Parroquia de San Pedro Las Huertas with cross, San Pedro Las Huertas, Sacatepéquez, Guatemala, 1936 June 6.
DOI: 10.25549/annis-ouc17181028
title: Walls in Guatemala, 1934

description: Walls with no place specified, Guatemala, 1934 August 27.
DOI: 10.25549/annis-ouc17186014
title: Walls in Guatemala, 1945

description: Walls with no place specified, Guatemala, 1945.
DOI: 10.25549/annis-ouc17185251
title: Walls in Guatemala, 1945

description: Walls with no place specified, Guatemala, 1945.
DOI: 10.25549/annis-ouc17185395
title: Iglesia del Cerrito del Carmen, Guatemala City, Guatemala, 1934

description: Iglesia del Cerrito del Carmen, first construction by Spanish conquerors in what became Guatemala City, Guatemala Department, Guatemala, 1934 July 30.
DOI: 10.25549/annis-ouc17185322
title: Iglesia del Cerrito del Carmen, Guatemala City, Guatemala, 1934

description: Iglesia del Cerrito del Carmen, first construction by Spanish conquerors in what became Guatemala City, Guatemala Department, Guatemala, 1934 July 30.
DOI: 10.25549/annis-ouc17187779
title: Gate, Cathedral of Guatemala City, Guatemala, 1934

description: Wall, fence, and gate of the Cathedral of Guatemala City, Guatemala Department, Guatemala, 1934 August 17.
DOI: 10.25549/annis-ouc17188397
title: Iglesia del Cerrito del Carmen in Guatemala City, Guatemala, 1934

description: Iglesia del Cerrito del Carmen, first construction by Spanish conquerors in what became Guatemala City, Guatemala Department, Guatemala, 1934 July 30 and August 14.
DOI: 10.25549/annis-ouc17188644
title: Iglesia del Cerrito del Carmen in Guatemala City, Guatemala, 1934

description: Iglesia del Cerrito del Carmen, first construction by Spanish conquerors in what became Guatemala City, Guatemala Department, Guatemala, 1934 July 30 and August 14.
DOI: 10.25549/annis-ouc17180331
title: Interiors, La Merced Church, Guatemala City, Guatemala, 1938 & 1965

description: "Interior, altars and benches of Merced Church in Guatemala City," Guatemala Department, Guatemala, 1938 July 29 and 1965.
DOI: 10.25549/annis-ouc17179720
title: Interiors, La Merced Church, Guatemala City, Guatemala, 1938 & 1965

description: "Interior, altars and benches of Merced Church in Guatemala City," Guatemala Department, Guatemala, 1938 July 29 and 1965.
DOI: 10.25549/annis-ouc17184692
title: Iglesia San Miguel de Capuchinas, Guatemala City, 1965

description: "Altars of Capuchinas now in Guatemala City," Guatemala Department, Guatemala, 1965.
DOI: 10.25549/annis-ouc17187800
title: Interiors, La Merced Church, Guatemala City, Guatemala, 1965

description: Organ, sanctuary, and transept of the La Merced Church, Guatemala City, Guatemala Department, Guatemala, 1965.
DOI: 10.25549/annis-ouc17180500
title: Interiors, La Merced Church, Guatemala City, Guatemala, 1965

description: Organ, sanctuary, and transept of the La Merced Church, Guatemala City, Guatemala Department, Guatemala, 1965.
DOI: 10.25549/annis-ouc17186742
title: "National Post Office" and "National Telegraph Office," Guatemala City, Guatemala, 1938

description: Two buildings, the "National Post Office" and "National Telegraph Office," Guatemala City, Guatemala, 1938 April 13.
DOI: 10.25549/annis-ouc17189221
title: "Palace Hotel" with no information, probably Guatemala City, Guatemala, 1934-1966

description: Large fruit display on a table in a courtyard with the tab "Palace Hotel," probably in Guatemala City, Guatemala Department, Guatemala, 1934-1966.
DOI: 10.25549/annis-ouc17181572
title: "Palace Hotel" with no information, probably Guatemala City, Guatemala, 1934-1966

description: Large fruit display on a table in a courtyard with the tab "Palace Hotel," probably in Guatemala City, Guatemala Department, Guatemala, 1934-1966.
DOI: 10.25549/annis-ouc17184364
title: Scenes and parade in Guatemala City, Guatemala, 1934

description: A "parade of athletes," with an outdoor market, a "new Colonial Museum," and a porter, Guatemala City, Guatemala Department, Guatemala, 1934 July 29.
DOI: 10.25549/annis-ouc17186152
title: Scenes and parade in Guatemala City, Guatemala, 1934

description: A "parade of athletes," with an outdoor market, a "new Colonial Museum," and a porter, Guatemala City, Guatemala Department, Guatemala, 1934 July 29.
DOI: 10.25549/annis-ouc17188362
title: Chamber of Deputies and Presidential Palace, Guatemala City, Guatemala, 1934 & 1938

description: National government buildings in Guatemala City--the "Chamber of Deputies" and "Presidential Palace," 1934 August 17, 1938 July 1 and 29.
DOI: 10.25549/annis-ouc17185986
title: "National Museum" and Tipografía Nacional, Guatemala City, Guatemala, 1938

description: The museum Tipografía Nacional and an unidentified "National Museum," Guatemala City, Guatemala Department, Guatemala, 1938 July 29.
DOI: 10.25549/annis-ouc17184832
title: "National Post Office" and "National Telegraph Office," Guatemala City, Guatemala, 1938

description: Two buildings, the "National Post Office" and "National Telegraph Office," Guatemala City, Guatemala, 1938 April 13.
DOI: 10.25549/annis-ouc17181594
title: "National Post Office" and "National Telegraph Office," Guatemala City, Guatemala, 1938

description: Two buildings, the "National Post Office" and "National Telegraph Office," Guatemala City, Guatemala, 1938 April 13.
DOI: 10.25549/annis-ouc17179345
title: "Palace Hotel" with no information, probably Guatemala City, Guatemala, 1934-1966

description: Large fruit display on a table in a courtyard with the tab "Palace Hotel," probably in Guatemala City, Guatemala Department, Guatemala, 1934-1966.
DOI: 10.25549/annis-ouc17201120
title: Street scenes, arch, Chichicastenango, Guatemala, 1934

description: "Street scenes" and the entrance arch, Chichicastenango, El Quiché, Guatemala, 1934 August 5 and 22.
DOI: 10.25549/annis-ouc17199365
title: "Market day," Chichicastenango, Guatemala, 1934

description: "Market day," with a "family group," Chichicastenango, El Quiché, Guatemala, 1934 August 5 and 26.
DOI: 10.15468/dl.rq4emz
title: Occurrence Download

description: A dataset containing 5152 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Coreoperca",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 5152 records from 38 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001453-260221153910048/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/annis-ouc17193183
title: "Market day," Chichicastenango, Guatemala, 1934

description: "Market day," with a "family group," Chichicastenango, El Quiché, Guatemala, 1934 August 5 and 26.
DOI: 10.25549/annis-ouc17195836
title: "Market day," Chichicastenango, Guatemala, 1934

description: "Market day," with a "family group," Chichicastenango, El Quiché, Guatemala, 1934 August 5 and 26.
DOI: 10.25549/annis-ouc17200465
title: "Market day," Chichicastenango, Guatemala, 1934

description: "Market day," with a "family group," Chichicastenango, El Quiché, Guatemala, 1934 August 5 and 26.
DOI: 10.25549/annis-ouc17186002
title: Parque Hippodrome, Guatemala City, Guatemala, 1934 & 1938

description: Temple of Minerva in Parque Hippodrome, Guatemala City, Guatemala Department, Guatemala, 1934 July 30 and 1938 March 17.
DOI: 10.25549/annis-ouc17179331
title: Parque Hippodrome, Guatemala City, Guatemala, 1934 & 1938

description: Temple of Minerva in Parque Hippodrome, Guatemala City, Guatemala Department, Guatemala, 1934 July 30 and 1938 March 17.
DOI: 10.25549/annis-ouc17188800
title: Plaza and monument near church, Guatemala City, Guatemala, 1934

description: Monument near El Cerrito del Carmen, and plaza, Guatemala City, Guatemala Department, Guatemala, 1934 August 14 and 17.
DOI: 10.25549/annis-ouc17185388
title: Relief Map of Guatemala, Guatemala City, Guatemala, 1934

description: The "Relief Map of Guatemala," a topographic model of the country covering approximately 1,800 square meters, Guatemala City, Guatemala Department, Guatemala, 1934 July 30.
DOI: 10.25549/annis-ouc17184254
title: Relief Map of Guatemala, Guatemala City, Guatemala, 1938

description: The "Relief Map of Guatemala," a topographic model "in Parque Hippodrome," Guatemala City, Guatemala Department, Guatemala, 1938 March 17.
DOI: 10.25549/annis-ouc17185132
title: Scenes and parade in Guatemala City, Guatemala, 1934

description: A "parade of athletes," with an outdoor market, a "new Colonial Museum," and a porter, Guatemala City, Guatemala Department, Guatemala, 1934 July 29.
DOI: 10.25549/annis-ouc17185807
title: Scenes and parade in Guatemala City, Guatemala, 1934

description: A "parade of athletes," with an outdoor market, a "new Colonial Museum," and a porter, Guatemala City, Guatemala Department, Guatemala, 1934 July 29.
DOI: 10.25549/annis-ouc17189063
title: Scenes and parade in Guatemala City, Guatemala, 1934

description: A "parade of athletes," with an outdoor market, a "new Colonial Museum," and a porter, Guatemala City, Guatemala Department, Guatemala, 1934 July 29.
DOI: 10.25549/annis-ouc17187193
title: Scenes and parade in Guatemala City, Guatemala, 1934

description: A "parade of athletes," with an outdoor market, a "new Colonial Museum," and a porter, Guatemala City, Guatemala Department, Guatemala, 1934 July 29.
DOI: 10.25549/annis-ouc17181026
title: Scenes and parade in Guatemala City, Guatemala, 1934

description: A "parade of athletes," with an outdoor market, a "new Colonial Museum," and a porter, Guatemala City, Guatemala Department, Guatemala, 1934 July 29.
DOI: 10.25549/annis-ouc17182032
title: Church of San Miguel Escobar, Antigua, Guatemala, 1966

description: The church in the Barrio of San Miguel Escobar, Antigua, Sacatepéquez, Guatemala, 1966 May.
DOI: 10.15468/dl.a5m7qc
title: Occurrence Download

description: A dataset containing 14415 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Trivia",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 14415 records from 242 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001454-260221153910048/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/annis-ouc17185167
title: Ruins, "Beatas Indias," Antigua, Guatemala, 1934

description: Ruins labeled "Beatas Indias," Antigua, Sacatepéquez, Guatemala, 1934 August 28.
DOI: 10.5286/isis.e.rb2510298-1
title: Protons in silica supported phosphotungstic acid catalysts

description: Acid catalysts use highly mobile protons to activate a range of organic compounds such as olefins. The radicals then react to form long chain olefins. The reaction mechanism can be controlled by adjusting the acidity of the solid catalyst. Phosphorus tungsten acid (PTA) is such a catalyst whose catalytic activity can be enhanced by interaction with oxide supports. Catalysis experiments have demonstrated the efficacy of silica supported PTA, but the origin of the activity, e.g. due to a change in acidity, is debated. We performed X-ray photoelectron spectroscopy experiments, which indicate electronic structure changes due to electron transfer between PTA and oxide. However, electron spectroscopy cannot measure the hydrogen partial density of state, making it difficult to attribute the measured changes to increased acidity. We therefore plan to use neutron inelastic scattering (INS) at TOSCA to measure the hydrogen-dominated vibrational density of states, which will allow us to distinguish between protons and other hydrogen atoms (mainly as water) in the compound.
DOI: 10.25549/annis-ouc17184814
title: Views of Antigua and Volcán de Agua, Antigua, Guatemala, 1966

description: Views of Antigua and Volcán de Agua from Manchén Hill, Antigua, Sacatepéquez, Guatemala, 1966 June.