12 datasets found
  1. T

    Nigeria Population

    • tradingeconomics.com
    • es.tradingeconomics.com
    • +13more
    csv, excel, json, xml
    Updated Oct 10, 2012
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    TRADING ECONOMICS (2012). Nigeria Population [Dataset]. https://tradingeconomics.com/nigeria/population
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    json, csv, xml, excelAvailable download formats
    Dataset updated
    Oct 10, 2012
    Dataset authored and provided by
    TRADING ECONOMICS
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Time period covered
    Dec 31, 1960 - Dec 31, 2024
    Area covered
    Nigeria
    Description

    The total population in Nigeria was estimated at 232.7 million people in 2024, according to the latest census figures and projections from Trading Economics. This dataset provides the latest reported value for - Nigeria Population - plus previous releases, historical high and low, short-term forecast and long-term prediction, economic calendar, survey consensus and news.

  2. h

    Data from: Cellular development and evolution of the mammalian cerebellum...

    • heidata.uni-heidelberg.de
    tar, tiff, txt
    Updated Nov 29, 2023
    + more versions
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    Mari Sepp; Kevin Leiss; Florent Murat; Konstantin Okonechnikov; Piyush Joshi; Evgeny Leushkin; Lisa Spänig; Noe Mbengue; Céline Schneider; Julia Schmidt; Nils Trost; Maria Schauer; Philipp Khaitovich; Steven Lisgo; Miklós Palkovits; Peter Giere; Lena M. Kutscher; Simon Anders; Margarida Cardoso-Moreira; Ioannis Sarropoulos; Stefan M. Pfister; Henrik Kaessmann; Mari Sepp; Kevin Leiss; Florent Murat; Konstantin Okonechnikov; Piyush Joshi; Evgeny Leushkin; Lisa Spänig; Noe Mbengue; Céline Schneider; Julia Schmidt; Nils Trost; Maria Schauer; Philipp Khaitovich; Steven Lisgo; Miklós Palkovits; Peter Giere; Lena M. Kutscher; Simon Anders; Margarida Cardoso-Moreira; Ioannis Sarropoulos; Stefan M. Pfister; Henrik Kaessmann (2023). Cellular development and evolution of the mammalian cerebellum [Research Data] [Dataset]. http://doi.org/10.11588/DATA/QDOC4E
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    tar(20350269440), tar(21980160000), tar(19810949120), tar(25514854400), tar(22932060160), tar(17551349760), tar(15733514240), tar(19228313600), tar(20169728000), tar(11970498560), tar(20195031040), tiff(2206433448), tar(19439288320), tar(25579212800), tar(26459678720), tar(23409940480), tar(21405020160), tar(27482992640), tar(29459220480), tar(21361039360), tar(19694049280), tar(29291632640), tar(21800714240), tar(22317301760), tar(21639761920), tar(27280506880), tar(11223654400), tar(1076756480), tar(21334528000), tar(23717488640), txt(137324347), tar(14376755200), tar(20467507200), tar(20749107200), tar(21716500480), tar(23754731520), tar(17895004160), tar(20245166080), tar(20888360960), tar(7283353600), tar(14475786240), tar(27152670720), tar(28158003200), tar(11142369280), tar(20514600960), tar(22130892800), tar(23066265600), tar(35991889920), tar(20624230400), tar(17603379200), tar(26110709760), tar(20361984000), tar(16560875520), tar(25992980480), tar(19984629760), tar(18859448320), tar(21740492800), tar(15778037760), tar(15849410560), tar(22592942080), tar(26309048320), tar(21611601920), tar(19946915840), tar(20704440320), tar(23422238720), tar(23225825280), tar(19465349120), tar(21694791680), tar(28068986880), tar(29115514880), tar(20250746880), tar(20358656000), tar(22247444480), tar(21845360640), tar(21514496000), tar(19325429760), tar(16944547840), tar(21540239360), tar(27765135360), tar(25437573120), tar(20602849280), tar(22602178560), tar(20406200320), tar(12627240960), tar(23452815360), tar(19094466560), tar(22352230400), tar(26556672000), tar(27219609600)Available download formats
    Dataset updated
    Nov 29, 2023
    Dataset provided by
    heiDATA
    Authors
    Mari Sepp; Kevin Leiss; Florent Murat; Konstantin Okonechnikov; Piyush Joshi; Evgeny Leushkin; Lisa Spänig; Noe Mbengue; Céline Schneider; Julia Schmidt; Nils Trost; Maria Schauer; Philipp Khaitovich; Steven Lisgo; Miklós Palkovits; Peter Giere; Lena M. Kutscher; Simon Anders; Margarida Cardoso-Moreira; Ioannis Sarropoulos; Stefan M. Pfister; Henrik Kaessmann; Mari Sepp; Kevin Leiss; Florent Murat; Konstantin Okonechnikov; Piyush Joshi; Evgeny Leushkin; Lisa Spänig; Noe Mbengue; Céline Schneider; Julia Schmidt; Nils Trost; Maria Schauer; Philipp Khaitovich; Steven Lisgo; Miklós Palkovits; Peter Giere; Lena M. Kutscher; Simon Anders; Margarida Cardoso-Moreira; Ioannis Sarropoulos; Stefan M. Pfister; Henrik Kaessmann
    License

    https://heidata.uni-heidelberg.de/api/datasets/:persistentId/versions/3.0/customlicense?persistentId=doi:10.11588/DATA/QDOC4Ehttps://heidata.uni-heidelberg.de/api/datasets/:persistentId/versions/3.0/customlicense?persistentId=doi:10.11588/DATA/QDOC4E

    Dataset funded by
    Wellcome Trust
    Brain Research Program
    European Research Council
    UK Medical Research Council
    Cancer Research UK
    Description

    The expansion of the neocortex, a hallmark of mammalian evolution1,2, was accompanied by an increase in cerebellar neuron numbers3. However, little is known about the evolution of the cellular programs underlying cerebellum development in mammals. In this study, we generated single-nucleus RNA-sequencing data for ~400,000 cells to trace cerebellum development from early neurogenesis to adulthood in human, mouse, and the marsupial opossum. We established a consensus classification of the cellular diversity in the developing mammalian cerebellum and validated it by spatial mapping in the fetal human cerebellum. Our cross-species analyses revealed a largely conserved developmental dynamics of cell type generation, except for Purkinje cells, where we observed an expansion of early-born subtypes in the human lineage. Global transcriptome profiles, conserved cell state markers, and gene expression trajectories across neuronal differentiation show that cerebellar cell type-defining programs have been overall preserved for at least ~160 million years. However, we also identified many orthologous genes that gained or lost expression in cerebellar neural cell types in one of the species, or evolved new expression trajectories during neuronal differentiation, indicating widespread gene repurposing at the cell type level. Altogether, our study unveils shared and lineage-specific gene expression programs governing the development of cerebellar cells, and expands our understanding of mammalian brain evolution.

  3. e

    LTSER Zone Atelier Seine - Estuaire de la Seine - France - Dataset - B2FIND

    • b2find.eudat.eu
    Updated Nov 16, 2022
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    (2022). LTSER Zone Atelier Seine - Estuaire de la Seine - France - Dataset - B2FIND [Dataset]. https://b2find.eudat.eu/dataset/20441688-1f2b-54b0-af66-8d6b2f65379f
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    Dataset updated
    Nov 16, 2022
    Area covered
    Seine, France
    Description

    The Seine estuary is a megatidal estuary located in northern France. It is the third largest estuarine ecosystem in the country after the Gironde and Loire along the French Atlantic coast; its waters flow into the English Channel. The geographical zone of influence of the Seine estuary runs from just upstream of the Poses dam, at the limit of the tidal penetration into the estuary — 160 km upstream of Le Havre —to the eastern part of the Bay of Seine. It can be divided into three sections: the fresh water upstream section (125 km), the mixing zone characterized by varying salinity levels (35 km), and the marine downstream section under the influence of the Seine River. The megatidal regime generates a turbidity maximum in the mixing zone (middle estuary) between the marine and fluvial sections of the estuary. The Seine estuary is a typical estuarine ecosystem: highly stressed by natural fluctuations and anthropogenic pressures, and hosting a rich ecological system. The Seine valley and its estuary are of major economic importance for France, with the presence of two maritime ports. It’s watershed (79,000 km2) is the home to 17 million people, and accounts for 50 % of the river traffic in France, 40 % of the country's economic activity, and 30 % of its agricultural activities. In addition to the Greater Paris area (> 11 million inhabitants), which contributes heavily to the Seine estuary's upstream inputs, two other major river settlements — Rouen (500,000 inhabitants) and Le Havre (300,000 inhabitants) — are maritime ports of international importance. Due to economic development, the Seine estuary has been subjected to major hydrodynamic, ecological, biogeomorphological and biogeochemical changes. The importance of studying the effects of anthropogenic impacts on estuarine ecosystems has increased in the last decade, especially under the Water Framework Directive, which aims to achieve “good environmental status” of all European water bodies.

  4. Irish Times - Waxy-Wany News

    • kaggle.com
    Updated Sep 25, 2021
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    Rohit Kulkarni (2021). Irish Times - Waxy-Wany News [Dataset]. https://www.kaggle.com/therohk/ireland-historical-news/code
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    CroissantCroissant is a format for machine-learning datasets. Learn more about this at mlcommons.org/croissant.
    Dataset updated
    Sep 25, 2021
    Dataset provided by
    Kaggle
    Authors
    Rohit Kulkarni
    License

    https://creativecommons.org/publicdomain/zero/1.0/https://creativecommons.org/publicdomain/zero/1.0/

    Description

    Context

    This news dataset is a composition of 1.61 million headlines posted by the Irish Times that cover a quarter of a century.

    Created over 160 years ago, the agency can provides long term birds eye view of the happenings in Europe. The major categories include business, sport, culture, lifestyle and opinion in addition to news.

    See these reports for date distribution and missing dates.

    Content

    CSV Records: 1;611;495

    • 1 publish_date: Date of the article being published in yyyyMMdd format
    • 2 headline_category: Category of the headline, Ascii, dot delimited, lowercase values
    • 3 headline_text: Title of the article in English in UTF-8 charset

    Start Date: 1996-01-01 ; End Date: 2021-06-30 ;

    A separate bonus dataset containing fifteen months of observational data from Nigeria is included.

    Inspiration

    Special Thanks to the journalists who were involved in the creation of this dataset.

    Great care has been taken to conserve these headlines exactly in the order in which they were published by the agency.

    Minimal cleanup and processing was required for this dataset due to generally optimal categories, a clean site layout and formatting.

  5. T

    United States Employed Persons

    • tradingeconomics.com
    • ar.tradingeconomics.com
    • +13more
    csv, excel, json, xml
    Updated Jul 15, 2025
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    TRADING ECONOMICS (2025). United States Employed Persons [Dataset]. https://tradingeconomics.com/united-states/employed-persons
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    csv, excel, json, xmlAvailable download formats
    Dataset updated
    Jul 15, 2025
    Dataset authored and provided by
    TRADING ECONOMICS
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Time period covered
    Jan 31, 1948 - Jul 31, 2025
    Area covered
    United States
    Description

    The number of employed persons in The United States decreased to 163106 Thousand in July of 2025 from 163366 Thousand in June of 2025. This dataset provides - United States Employed Persons - actual values, historical data, forecast, chart, statistics, economic calendar and news.

  6. d

    B2B Contact Data | 249 Countries Coverage | 800m+ Professional Profiles

    • datarade.ai
    .json, .csv
    Updated Jul 18, 2023
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    Rhetorik (2023). B2B Contact Data | 249 Countries Coverage | 800m+ Professional Profiles [Dataset]. https://datarade.ai/data-products/neuron360-global-b2b-profile-data-rhetorik
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    .json, .csvAvailable download formats
    Dataset updated
    Jul 18, 2023
    Dataset authored and provided by
    Rhetorik
    Area covered
    Cocos (Keeling) Islands, Aruba, Belarus, Mauritius, Belgium, Nigeria, Burundi, Ascension and Tristan da Cunha, El Salvador, Georgia
    Description

    Reach more people, wherever they are.

    Rhetorik360-Profiles is the perfect solution to find professional profiles globally. Plug into 800M+ profiles globally to boost your software, products, and talent analytics. Rhetorik360-Profiles responds to real-time queries and provides weekly updates of both current and historical employment data from a wide array of geographic regions and industries. Comprising dozens of data fields, Rhetorik360-Profiles includes current employer, job title, skills, career and educational levels and more!

    Available for lead lists, data enrichment, account and contact data hygiene and validation, company technographics, leads, ABM, recruiting and other uses. One-time and annual use licensing available.

    Use the Rhetorik360 Global Professional Profiles DB with its linked sister database, the Rhetorik360 Global B2B Companies Database to get the best global coverage of Companies, Offices and Professionals.

    230 Million Companies 800 Million Professional Profiles 109 Company Attributes 192 Professional Profile Attributes

    This is a new-to-market, uniquely sourced data set using the power of Rhetorik's proprietary AI. We amalgamate billions of data points from scores of sources to create a world-class BTB Company and Contact data asset.

    North America: 290M+ Professionals EMEA: 250M+ Professionals APAC: 160M+ Professionals LATAM: 100M+ Professionals

    Smarter B2B Profile data for product developers, workforce analytics, recruiters, and talent acquisition teams. Build robust applications and comprehensive data-driven products with smarter profile data via API, Snowflake Marketplace, or flat file. Research and analyze your target audiences to identify the right peoples using the latest in-depth and comprehensive professional profiles.

    Access it where and when you need it. Rhetorik360-Profiles is available via APIs, Snowflake Marketplace, or bulk delivery in JSON and CSV formats and supports a wide range of use cases. Data is refreshed weekly, so you can be sure your information is always up to date!

  7. o

    Somalia Districts hit by 2015 Tropical Cyclone Megh - Dataset - SODMA Open...

    • sodma-dev.okfn.org
    Updated May 23, 2025
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    sodma-dev.okfn.org (2025). Somalia Districts hit by 2015 Tropical Cyclone Megh - Dataset - SODMA Open Data Portal [Dataset]. https://sodma-dev.okfn.org/dataset/icpac-geonode-somalia-districts-hit-by-2015-tropical-cyclone-megh
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    Dataset updated
    May 23, 2025
    Dataset provided by
    Somali Disaster Management Agencyhttps://sodma.gov.so/
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Area covered
    Somalia
    Description

    2015 TC Megh struck Berbera and Bossaso Districts in Somalia. The storm orignated from the Arabian Sea causing even more rains in parts of Bari region in Puntland and Somaliland. On November 9, 2015 just days after TC Chapala, TC Megh passed 57 km (36 mi) north of Cape Guardafui, Somalia, where it dropped heavy rainfall 300% of the annual average. Eyl reported 160 mm (6.3 in) of rainfall over 24 hours. The villages hitted in the two districts included, Af Kalahay, Alula, Bareda, BiyoCade, Boolimoog, Dhurbo, Fagoora, Geesalay, Murcanyo, Sayn Weyn, Sayn Yar, Toxin, Xaabo, Baargaal, Bander, Bareeda, Butiyaal, Caluula, Murcanyo, Qandalla, Xaabo and some parts of Xaafun, Biyacad, Bulahar, Ceelsheik and Shacable TC Megh damaged roads, crops, and schools. Re-estimated population figures after Tropical Megh, showed 4.9 million people were in need of assistance, 308,700 children under-5 were acutely malnourished, of which 55,800 were severely malnourished and 1.1 million remain in a protracted internal displacement situation. Summary of impacts include: People affected: 132,000 People Displace: 3,000 Worst hit people: 800 Destroyed houses: 1,129

  8. s

    Vernachlaessigte Vielfalt in einem Biodiversitaethotspot: die Amphibien und...

    • katalog.satudata.go.id
    Updated Nov 7, 2022
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    (2022). Vernachlaessigte Vielfalt in einem Biodiversitaethotspot: die Amphibien und Reptilien von Sulawesi, Indonesien - Dataset - Portal Satu Data Indonesia [Dataset]. https://katalog.satudata.go.id/dataset/vernachlaessigte-vielfalt-in-einem-biodiversitaethotspot-die-amphibien-und-reptilien-von-sulawe
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    Dataset updated
    Nov 7, 2022
    Area covered
    Sulawesi, Indonesia
    Description

    Southeast Asia is one of the biologically most diverse regions on earth. At the same time, this natural wealth and global heritage is threatened by enormous economic growth rates and high human population pressure. Consequently, this vast tropical area is distinguished by the highest density of internationally recognized biodiversity hotspots. The Wallacea hotspot is located between the continental shelves of Eurasia and Australia and comprises Sulawesi, the Lesser Sunda Islands, and the Moluccas (Spice Islands). Sulawesi, formerly known as Celebes, is the largest land mass within the biogeographic transition zone between Asia and Australia and unites unique faunal elements from both biologically distinct regions. Compared with the amphibians and reptiles of the three Greater Sunda Islands, the herpetofaunal diversity of Sulawesi is impoverished, since many wide-spread Southeast Asian amphibian and reptile genera did not succeed in colonizing Sulawesi in the past. This depauperate faunal character is the result of the million-year long geological isolation of Sulawesi from surrounding island regions due to marine barriers and strong sea currents. However, despite ambitious investigations by several industrious scientists during the past two centuries, recent fieldwork on Sulawesi and its smaller offshore islands has revealed that the diversity of amphibian and reptile species has been largely underestimated. Since the last herpetological synopsis was published in 1996, 36 new amphibian and reptile species plus five subspecies have been described or were newly recorded for Sulawesi and its satellite islands. In addition, about 40 species, mainly skinks, have been identified as new to science and still await formal scientific description. This represents an increase by 35 persen! In total, about 215 different species of amphibians (ca. 50 species) and reptiles (ca. 160 species) are currently recognized from the Sulawesi region and further will be discovered in the future. Zeitschrift des Koelner Zoos 56 (4): 149-162

  9. T

    United States Non Farm Payrolls

    • tradingeconomics.com
    • zh.tradingeconomics.com
    • +13more
    csv, excel, json, xml
    Updated Aug 1, 2025
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    TRADING ECONOMICS (2025). United States Non Farm Payrolls [Dataset]. https://tradingeconomics.com/united-states/non-farm-payrolls
    Explore at:
    csv, xml, json, excelAvailable download formats
    Dataset updated
    Aug 1, 2025
    Dataset authored and provided by
    TRADING ECONOMICS
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Time period covered
    Feb 28, 1939 - Jul 31, 2025
    Area covered
    United States
    Description

    Non Farm Payrolls in the United States increased by 73 thousand in July of 2025. This dataset provides the latest reported value for - United States Non Farm Payrolls - plus previous releases, historical high and low, short-term forecast and long-term prediction, economic calendar, survey consensus and news.

  10. d

    Data from: Data sets of China sedimentary rock-hosted Au deposits: Appendix...

    • dataone.org
    • data.doi.gov
    • +1more
    Updated Dec 1, 2016
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    Peters, Stephen G. (editor); Li, Z.; Huang, J.; Leonard, C. (2016). Data sets of China sedimentary rock-hosted Au deposits: Appendix III and Appendix IV [Dataset]. https://dataone.org/datasets/31a5bf11-9af5-418a-96a4-681696f00b54
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    Dataset updated
    Dec 1, 2016
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Authors
    Peters, Stephen G. (editor); Li, Z.; Huang, J.; Leonard, C.
    Area covered
    Variables measured
    C, F, S, U, W, Ag, As, Au, Ba, Bi, and 58 more
    Description

    These data sets include deposit description, location, and geochemistry of sedimentary rock-hosted (Carlin-type) Au deposits in P.R. China. Deposit data was compiled by U.S. Geological Survey and Tianjim Geological Academy into a series of tables (.xls and .csv) provided in Open-File Report 02-131, Appendix III and IV. Since the 1980s, Chinese geologists have devoted a large-scale exploration and research effort to the deposits. As a result, there are more than 20 million oz of proven Au reserves in sedimentary rock-hosted Au deposits in P.R. China. Additional estimated and inferred resources are present in over 160 deposits and occurrences, which are undergoing exploration. This makes China second to Nevada in contained ounces of Au in Carlin-type deposits. It is likely that many of the Carlin-type Au ore districts in China, when fully developed, could have resource potential comparable to the multi-1,000-tonne Au resource in northern Nevada.

  11. Number of data compromises and impacted individuals in U.S. 2005-2024

    • statista.com
    Updated Jul 14, 2025
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    Statista (2025). Number of data compromises and impacted individuals in U.S. 2005-2024 [Dataset]. https://www.statista.com/statistics/273550/data-breaches-recorded-in-the-united-states-by-number-of-breaches-and-records-exposed/
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    Dataset updated
    Jul 14, 2025
    Dataset authored and provided by
    Statistahttp://statista.com/
    Area covered
    United States
    Description

    In 2024, the number of data compromises in the United States stood at 3,158 cases. Meanwhile, over 1.35 billion individuals were affected in the same year by data compromises, including data breaches, leakage, and exposure. While these are three different events, they have one thing in common. As a result of all three incidents, the sensitive data is accessed by an unauthorized threat actor. Industries most vulnerable to data breaches Some industry sectors usually see more significant cases of private data violations than others. This is determined by the type and volume of the personal information organizations of these sectors store. In 2024 the financial services, healthcare, and professional services were the three industry sectors that recorded most data breaches. Overall, the number of healthcare data breaches in some industry sectors in the United States has gradually increased within the past few years. However, some sectors saw decrease. Largest data exposures worldwide In 2020, an adult streaming website, CAM4, experienced a leakage of nearly 11 billion records. This, by far, is the most extensive reported data leakage. This case, though, is unique because cyber security researchers found the vulnerability before the cyber criminals. The second-largest data breach is the Yahoo data breach, dating back to 2013. The company first reported about one billion exposed records, then later, in 2017, came up with an updated number of leaked records, which was three billion. In March 2018, the third biggest data breach happened, involving India’s national identification database Aadhaar. As a result of this incident, over 1.1 billion records were exposed.

  12. Data Set for Thermogel Actuation for Driving Directional Stromal Cell...

    • figshare.com
    bin
    Updated Mar 22, 2024
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    Jacek K. Wychowaniec; Athanasia Pylostomou; Charlotte J. C. Edwards-Gayle; Andrea vernengo (2024). Data Set for Thermogel Actuation for Driving Directional Stromal Cell Communication and Migration into Columnar Arrays [Dataset]. http://doi.org/10.6084/m9.figshare.24915897.v1
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    binAvailable download formats
    Dataset updated
    Mar 22, 2024
    Dataset provided by
    Figsharehttp://figshare.com/
    Authors
    Jacek K. Wychowaniec; Athanasia Pylostomou; Charlotte J. C. Edwards-Gayle; Andrea vernengo
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Description

    This dataset presents information on the freeform printing and temperature actuation of a hydrogel. The hydrogel, comprising a blend of poly(N-isopropylacrylamide) grafted with chondroitin sulfate, gelatin, and Carbopol 940, facilitates cell spatial communication through mild temperature changes, a process referred to as actuation. The dataset includes NMR, rheological, SAXS characterization, as well as cell images stained with DAPI/Phalloidin. Poly(N-isopropylacrylamide)-g-chondroitin sulfate Synthesis: Free radical polymerization of pNIPAAm-CS was performed as described previously according to the following publication with a molar ratio of NIPAAm:CS of 2500:1. Christiani, T., Mys, K., Dyer, K., Kadlowec, J., Iftode, C. and Vernengo, A.J., 2021. Using embedded alginate microparticles to tune the properties of in situ forming poly (N‐isopropylacrylamide)‐graft‐chondroitin sulfate bioadhesive hydrogels for replacement and repair of the nucleus pulposus of the intervertebral disc. JOR spine, 4(3), p.e1161. The functionalization degree of CS was assessed by 1H-NMR analysis according to Wang et al. [86] and found to be 35.4%. Wang, L.F., Shen, S.S. and Lu, S.C., 2003. Synthesis and characterization of chondroitin sulfate–methacrylate hydrogels. Carbohydrate Polymers, 52(4), pp.389-396. Preparation of EXPECT Hydrogels Aqueous solutions of 3% (w/v) pNIPAAm-CS + 0.8% (w/v) Carbopol® 940 (CP, Acros Organics Geel, Belgium) + 1% (w/v) gelatin (from porcine skin, 175 g Bloom, type A, Sigma, St. Louis, USA) were prepared. To produce the hydrogel for cell culture, the required reagents were UV-sterilized for 12 hours, and an aqueous solution of 3% (w/v) pNIPAAm-CS + 0.8% (w/v) CP + 1% (w/v) gelatin was prepared. For all formulations, the pH was adjusted to 7.4 with 50% sodium hydroxide (NaOH) and the hydrogel was stored at 4°C until testing. Rheological Characterization Rheological testing was conducted with an Anton Paar MCR-302 rheometer (Anton Paar GmbH, Austria). All measurements were taken with a gap size of 0.5 mm and a parallel plate with a diameter of 25 mm. Unless stated otherwise, the rheological properties were assessed at a temperature of 25°C, with a frequency of 1 Hz and with n = 3 samples per group. To prevent sample drying during the measurements, silicone oil was applied around the plate to seal the hydrogel. A 0.8% (w/v) CP hydrogel served as a control group for all tests. Amplitude Sweep Test An amplitude sweep test with oscillatory strain was used to determine storage modulus (G') and loss modulus (G'') within the range of 0.01% and 1000% strain. The flow stress was calculated at the point of the curves cross-over (G' = G'') using the integrated analysis tool of the RheoCompassTM software (version 1.26.22, Anton Paar GmbH, Austria). Temperature Ramp Test An oscillatory temperature ramp test with 1% constant strain (within linear viscoelastic region (LVR) as established by primary amplitude test) was used to evaluate viscoelastic properties as a function of temperature. The test was divided into three intervals, the first of which was a 60 s measurement at 25°C. After this, the temperature was increased to 37°C in the second interval for 600 s. In the third interval, the temperature was reduced to 25°C and the measurements were taken for 300 s. To calculate the absolute increase of G' caused by the increase of temperature from 25°C to 37°C, the following equation was used: ∆G^'= G_(t=y s)^'- G_(t=x s)^' (1) where G_(t=y s)^' defines the 4th data point of the first interval and G_(t=x s)^' the 30th data point of the second interval. Step Strain Test (Recovery) In an oscillatory step strain test, G' and G'' were measured while the strain was alternated between a low strain, set to 1%, and a high strain, set to 250%, over the course of seven intervals. The step strain test was started with 1% strain in the 1st interval, followed by 250% strain in the 2nd interval, and so on. Each interval was 120 s, except the 7th, which lasted 160 s at 1% strain. Small angle X-ray scattering (SAXS) Analysis SAXS was performed at B21 beamline, Diamond Light Source, UK with sample loading into MPS sticks enclosed with Kapton tape. Briefly, samples were collected and measured at 25 or 37°C, for 21 frames with 1 s exposure each. Relevant methods are here: Cowieson, N.P., Edwards-Gayle, C.J., Inoue, K., Khunti, N.S., Doutch, J., Williams, E., Daniels, S., Preece, G., Krumpa, N.A., Sutter, J.P. and Tully, M.D., 2020. Beamline B21: high-throughput small-angle X-ray scattering at Diamond Light Source. Journal of Synchrotron Radiation, 27(5), pp.1438-1446. Sceglovs, A., Wychowaniec, J.K., Skadins, I., Reinis, A., Edwards-Gayle, C.J., D'Este, M. and Salma-Ancane, K., 2023. Effect of steam sterilisation on physico-chemical properties of antibacterial covalently cross-linked ε-polylysine/hyaluronic acid hydrogels. Carbohydrate Polymer Technologies and Applications, 6, p.100363. Expansion of Human Mesenchymal Stromal Cells This work was done using cells isolated from the same donor (male, born in 1958), at University Hospital of Freiburg in Germany with the full approval of the patient. Furthermore, for supplementary Figure 5, an additional donor was evaluated (female, born in 1961), from the same university hospital with the patient’s consent. For the human MSC growth and expansion prior printing, Minimum Essential Medium Eagle - alpha modification (10.08g α-MEM powder, Gibco, Thermo Fischer, Switzerland and 2.2 g sodium bicarbonate (56014-1KG, Sigma-Aldrich, Switzerland) for 1L of basal medium), supplemented with 10% corning serum (FBS, Corning Incorporated, New York, USA), 1% (v/v) penicillin-streptomycin (Pen/Strep, Gibco, Carlsbad, USA), and 5 ng/ml basic Fibroblast Growth Factor (bFGF, Fitzgerald Industries International, Acton, MA, USA) was used. Cells were cultured at 37°C with 5% CO2 and 90% relative humidity. The expansion medium was changed three times per week, cells were passaged at 80% confluency and used at passage 4 for bioprinting. For MSC aggregate generation, AggreWell™ 400 Microwell Culture Plates (STEMCELLS technologies, Canada) were utilized. The wells were pretreated with AggreWell™ Rinsing solution for the prevention of cell adhesion to the well’s surface and the promotion of efficient spheroid formation. The cells were detached from the flasks using Trypsin-EDTA (Gibco, Thermo Fisher). The viable cells were determined by a hematocytometer and Trypan Blue exclusion, while the seeding of the cells took place at a concentration of 2 million cells per well following the manufacturer’s protocol for the aggregate generation. The cells were kept in the incubator overnight (24 hours) at 37°C with 5% CO2 to form the spheroids prior to 3D printing. 3D Printing For freeform 3D printing, MSCs (single cells or spheroidal aggregate format) were suspended in 6% (w/v) gelatin in the MSC growth medium described above at a total density of 4.0 x 106 cells/mL. The cell-laden bioinks were extruded through a PTFE-lined needle with 0.3 mm inner diameter and 12.7 mm length, inside 1 mL of the patternable hydrogel composed of 3% (w/v) pNIPAAm-CS + 0.8% (w/v) CP + 1% (w/v) gelatin. The printing pattern consisted of three circles with a radius of 5 mm, stacked in Z-direction with 1 mm spacing, and was deposited at a starting height of 2 mm inside the hydrogel. Printing parameters were as follows: 25°C ambient temperature, 16% relative humidity, 0.2 – 0.8 bar printing pressure, 25°C bioink temperature, and 0.5 mm/s deposition velocity. The cells were cultured in expansion medium for 14, 21 or 36 days at 37°C with 5% CO2 and 90% relative humidity. The culture medium was changed three times per week. For the purpose of the chondrogenic induction, chondrogenic medium was used for the MSCs post printing. The chondrogenic medium was composed of High glucose Dulbecco’s Modified Eagle Medium (Hg DMEM, Lot: 2551077,13.38 g H.g DMEM with 3.7 g of sodium bicarbonate (56014-1KG, Sigma-Aldrich, Switzerland) and 0.11 g of sodium pyruvate (P5280-25G, Sigma-Aldrich, Switzerland) for 1L basal medium), supplemented with 1% (v/v) Non-essential amino acid cell culture supplement (NEAA, Lot: 2554642, Gibco, Thermo Fischer, UK), 1% (v/v) insulin, human transferrin and selenous acid (ITS-plus,Lot: 3046004, Corning, Discovery Labware, Inc., Bedford, USA), 1% (v/v) L-Ascorbic Acid 2-phosphate sesquimagnesium salt hydrate (AA2P, A8960-5G, Sigma-Aldrich, Switzerland), 0.1% (v/v) dexamethasone (D2915-100MG, Lot: 029K1187, Sigma-Aldrich, Switzerland) and 0.1% (v/v) Transforming growth factor beta (TGFβ, Fitzgerald Industries International, USA). After the printing, the hydrogels were placed in the incubator (at 37°C with 5% CO2 and 90% relative humidity) for about an hour for solidification and then the chondrogenic medium was added. The culture of the MSCs and spheroids within the hydrogels took place under the same conditions. The medium was changed 3 times per week. Temperature Actuation of Printed EXPECT Samples Immediately post-printing, hydrogel from all groups was removed for a baseline imaging (referred to as day 0). Subsequently, on days 1, 3, and 5, and every 5 days thereafter, temperature actuation was implemented. The final temperature actuation cycle was applied until day 35, after which the hydrogels were equilibrated for 24 hours at 37°C before being harvested for imaging on day 36. The temperature actuation involved exposing culture plates to 25°C (ambient conditions outside the incubator) for 15 minutes. In contrast, static (control) samples were kept outside the incubator under the same conditions, except on a 37°C surface, to prevent the phase transition of the hydrogels.

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TRADING ECONOMICS (2012). Nigeria Population [Dataset]. https://tradingeconomics.com/nigeria/population

Nigeria Population

Nigeria Population - Historical Dataset (1960-12-31/2024-12-31)

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62 scholarly articles cite this dataset (View in Google Scholar)
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Dataset updated
Oct 10, 2012
Dataset authored and provided by
TRADING ECONOMICS
License

Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
License information was derived automatically

Time period covered
Dec 31, 1960 - Dec 31, 2024
Area covered
Nigeria
Description

The total population in Nigeria was estimated at 232.7 million people in 2024, according to the latest census figures and projections from Trading Economics. This dataset provides the latest reported value for - Nigeria Population - plus previous releases, historical high and low, short-term forecast and long-term prediction, economic calendar, survey consensus and news.

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