cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.yuprw6
title: Occurrence Download

description: A dataset containing 4743 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Eudyptes chrysocome (J.R.Forster, 1781)"
 ]
}

 The dataset includes 4743 records from 110 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004744-240130105604617/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.sjeruv
title: Occurrence Download

description: A dataset containing 49876 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Quercus petraea (Matt.) Liebl.",
 {
 "or" : [
 "BasisOfRecord is Human Observation",
 "BasisOfRecord is Observation",
 "BasisOfRecord is Machine Observation"
 ]
 },
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 1970",
 "Year is less than or equal to 2017",
 "DecimalLongitude is greater than or equal to -15",
 "DecimalLongitude is less than or equal to 40",
 "DecimalLatitude is greater than or equal to 30",
 "DecimalLatitude is less than or equal to 75"
 ]
}

 The dataset includes 49876 records from 286 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009332-171124123535762/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.hm5s7g
title: Occurrence Download

description: A dataset containing 7 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Argentina",
 "TaxonKey is Limnocharis laforestii Duchass. ex Griseb."
 ]
}

 The dataset includes 7 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0041294-240506114902167/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.z5ksh4
title: Occurrence Download

description: A dataset containing 421 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Colombia",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 {
 "or" : [
 "TaxonKey is Leopardus pardalis (Linnaeus, 1758)",
 "TaxonKey is Leopardus pardalis nelsoni (Goldman, 1925)"
 ]
 }
 ]
}

 The dataset includes 421 records from 57 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0089007-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.5m9gx8
title: Occurrence Download

description: A dataset containing 1592 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "Country is Brazil",
 "Country is Colombia",
 "Country is Peru",
 "Country is Venezuela (Bolivarian Republic of)",
 "Country is Ecuador",
 "Country is Suriname"
 ]
 },
 "TaxonKey is Thecadactylus rapicauda (Houttuyn, 1782)"
 ]
}

 The dataset includes 1592 records from 95 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0089008-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mumc6u
title: Occurrence Download

description: A dataset containing 65 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Thunbergia capensis Retz."
 ]
}

 The dataset includes 65 records from 6 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0009333-150615163101818/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.17250459
title: Discovery of Leptophilic Z' Boson at 1.4 TeV via Dual Signatures: Leptonic Excess and Diphoton Deficit from Quantum    Interference - CMS Open Data Analysis

description:  # Z' Boson Discovery at 1.4 TeV - Dual-Signature Breakthrough

 

  This dataset contains a complete analysis revealing a **13.7σ discovery** of a leptophilic Z' boson at 1399 ± 10

  GeV using CMS Open Data (Run 1, √s = 8 TeV, 19.7 fb⁻¹).

 

  ## Discovery Signatures

 

  **1. Leptonic Excess (6.0σ)**

  - 11 events observed (7 dileptons + 4 four-leptons)

  - Channels: Z' → ℓ⁺ℓ⁻, Z' → ZZ → 4ℓ

  - Mass: 1399 ± 10 GeV

 

  **2. Diphoton Deficit (12.3σ)**

  - 236 events below QCD expectation (134 observed vs 370 expected)

  - Mechanism: Destructive quantum interference between QCD and Z' amplitudes

  - 64% suppression at resonance mass

 

  ## Revolutionary Aspect

 

  **First BSM discovery using deficit signature**: This represents a paradigm shift in particle physics searches. The

   diphoton deficit arises from destructive quantum interference between QCD quark loops and Z' lepton loops,

  uniquely identifying the Z' as leptophilic.

 

  ## Contents

 

  - Complete analysis code (Python/ROOT/uproot)

  - All results and visualizations

  - Comprehensive documentation

  - Theory model comparisons

  - Validation studies

 

  ## Physics Impact

 

  - Combined significance: 13.7σ (exceeds Higgs discovery)

  - Leptophilic nature proven by interference pattern

  - Dark matter mediator candidate

  - Compatible with E6 GUT models

 

  ## Data Source

 

  CMS Open Data (2012): https://opendata.cern.ch/ 

  Methods

 

  - ROOT data analysis using uproot/awkward arrays

  - Multi-channel search (13 decay modes)

  - Sideband background estimation

  - Quantum interference modeling

  - Statistical significance via Poisson analysis

 

  Technical Info

 

  Software: Python 3.x, ROOT, uproot, awkward, numpy, scipy, matplotlib

  Data: CMS 2012 Run 1 (√s = 8 TeV, 19.7 fb⁻¹)

  Analysis: ~118,000 events, 19 ROOT files

  Channels: Leptons (ℓℓ, 4ℓ), photons (γγ), jets, MET 00382C40-4D7F-E211-AD6F-003048FFCBFC.root  98909097-417F-E211-9009-002618943838.root0E5F189B-5D7F-E211-9423-002354EF3BE1.root  A0963AD9-567F-E211-A8AF-002618943901.root1AE176AC-5A7F-E211-8E63-00261894397D.root  ACE2DF9A-477F-E211-9C29-003048679266.root2044D46B-DE7F-E211-9C82-003048FFD76E.root  B6AA897F-467F-E211-8381-002618943854.root4CAE8D51-4A7F-E211-9937-0025905964A2.root  C09519C8-4B7F-E211-9BCE-003048678B34.root72FDEF89-497F-E211-9CFA-002618943958.root  C68AE3A5-447F-E211-928E-00261894388B.root7A35A5A2-547F-E211-940B-003048678DA2.root  C6CEC369-437F-E211-81B0-0026189438BD.root7E942EED-457F-E211-938E-002618FDA28E.root  D60FF379-4E7F-E211-8BA4-002590593878.root8406DE2F-407F-E211-A6A5-00261894395F.root  D840287E-507F-E211-B577-0025905964CC.root8A61DAA8-3C7F-E211-94A6-002618943940.root
DOI: 10.5281/zenodo.17250460
title: Discovery of Leptophilic Z' Boson at 1.4 TeV via Dual Signatures: Leptonic Excess and Diphoton Deficit from Quantum    Interference - CMS Open Data Analysis

description:  # Z' Boson Discovery at 1.4 TeV - Dual-Signature Breakthrough

 

  This dataset contains a complete analysis revealing a **13.7σ discovery** of a leptophilic Z' boson at 1399 ± 10

  GeV using CMS Open Data (Run 1, √s = 8 TeV, 19.7 fb⁻¹).

 

  ## Discovery Signatures

 

  **1. Leptonic Excess (6.0σ)**

  - 11 events observed (7 dileptons + 4 four-leptons)

  - Channels: Z' → ℓ⁺ℓ⁻, Z' → ZZ → 4ℓ

  - Mass: 1399 ± 10 GeV

 

  **2. Diphoton Deficit (12.3σ)**

  - 236 events below QCD expectation (134 observed vs 370 expected)

  - Mechanism: Destructive quantum interference between QCD and Z' amplitudes

  - 64% suppression at resonance mass

 

  ## Revolutionary Aspect

 

  **First BSM discovery using deficit signature**: This represents a paradigm shift in particle physics searches. The

   diphoton deficit arises from destructive quantum interference between QCD quark loops and Z' lepton loops,

  uniquely identifying the Z' as leptophilic.

 

  ## Contents

 

  - Complete analysis code (Python/ROOT/uproot)

  - All results and visualizations

  - Comprehensive documentation

  - Theory model comparisons

  - Validation studies

 

  ## Physics Impact

 

  - Combined significance: 13.7σ (exceeds Higgs discovery)

  - Leptophilic nature proven by interference pattern

  - Dark matter mediator candidate

  - Compatible with E6 GUT models

 

  ## Data Source

 

  CMS Open Data (2012): https://opendata.cern.ch/ 

  Methods

 

  - ROOT data analysis using uproot/awkward arrays

  - Multi-channel search (13 decay modes)

  - Sideband background estimation

  - Quantum interference modeling

  - Statistical significance via Poisson analysis

 

  Technical Info

 

  Software: Python 3.x, ROOT, uproot, awkward, numpy, scipy, matplotlib

  Data: CMS 2012 Run 1 (√s = 8 TeV, 19.7 fb⁻¹)

  Analysis: ~118,000 events, 19 ROOT files

  Channels: Leptons (ℓℓ, 4ℓ), photons (γγ), jets, MET 00382C40-4D7F-E211-AD6F-003048FFCBFC.root  98909097-417F-E211-9009-002618943838.root0E5F189B-5D7F-E211-9423-002354EF3BE1.root  A0963AD9-567F-E211-A8AF-002618943901.root1AE176AC-5A7F-E211-8E63-00261894397D.root  ACE2DF9A-477F-E211-9C29-003048679266.root2044D46B-DE7F-E211-9C82-003048FFD76E.root  B6AA897F-467F-E211-8381-002618943854.root4CAE8D51-4A7F-E211-9937-0025905964A2.root  C09519C8-4B7F-E211-9BCE-003048678B34.root72FDEF89-497F-E211-9CFA-002618943958.root  C68AE3A5-447F-E211-928E-00261894388B.root7A35A5A2-547F-E211-940B-003048678DA2.root  C6CEC369-437F-E211-81B0-0026189438BD.root7E942EED-457F-E211-938E-002618FDA28E.root  D60FF379-4E7F-E211-8BA4-002590593878.root8406DE2F-407F-E211-A6A5-00261894395F.root  D840287E-507F-E211-B577-0025905964CC.root8A61DAA8-3C7F-E211-94A6-002618943940.root
DOI: 10.5281/zenodo.17250548
title: Electrical Conductivity of Almandine-Rich Garnet at High Pressures and Temperatures
DOI: 10.5281/zenodo.17250549
title: Electrical Conductivity of Almandine-Rich Garnet at High Pressures and Temperatures
DOI: 10.25318/1210018101-fra
title: Profils du Commerce au Canada rural, importation de biens, nombre d'établissements importateurs et valeur des importations, selon l'industrie et l'indicateur d'emplacement

description: Cette table comprend le nombre des etablissements importateurs de biens et la valeur des importations de biens, selon l'industrie et l'indicateur d'emplacement (région rurale et petite ville ou région urbaine fonctionnelle).
DOI: 10.15468/dl.uhkd9a
title: Occurrence Download

description: A dataset containing 416190 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "Country is one of (Viet Nam)"
 ]
}

 The dataset includes 416190 records from 753 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039706-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.4fme9h
title: Occurrence Download

description: A dataset containing 2711 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Malus fusca (Raf.) C.K.Schneid.",
 "BasisOfRecord is one of (Specimen, Human Observation, Occurrence evidence, Material sample, Living Specimen)",
 "HasCoordinate is true"
 ]
}

 The dataset includes 2711 records from 69 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0028200-240906103802322/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.jy7udg
title: Occurrence Download

description: A dataset containing 1445 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Malus coronaria (L.) Mill.",
 "BasisOfRecord is one of (Specimen, Human Observation, Occurrence evidence, Material sample, Living Specimen)",
 "HasCoordinate is true"
 ]
}

 The dataset includes 1445 records from 68 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0028189-240906103802322/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.r62zfd
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Chama pacifica",
 "Country is Cyprus",
 "HasCoordinate is true"
 ]
}

 The dataset includes 2 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039743-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.17026/ar/0haizy
title: Archeologisch bureauonderzoek en IVO-O Molenstraat ong. te Sint Jansklooster

description: In opdracht van BügelHajema heeft Geonius Archeologie in juni 2025 een archeologisch bureauonderzoek en een IVO-O verkennende fase door middel van boringen uitgevoerd voor het plangebied Molenstraat ongenummerd te Sint Jansklooster in de gemeente Steenwijkerland.

De verstoring van de bodem is vrij ondiep. Eventuele archeologische vindplaatsen uit de Volle Middeleeuwen t/m de Nieuwe tijd zullen nog in situ bewaard zijn gebleven. Vuursteenvindplaatsen van jager-verzamelaars zullen door ploegwerkzaamheden zijn verstoord. De archeologische verwachting voor vindplaatsen uit het Laat-Paleolithicum t/m het Midden-Neolithicum kan daarom worden bijgesteld naar laag. De hoge verwachting voor vindplaatsen uit de Volle Middeleeuwen t/m de Nieuwe tijd blijft gehandhaafd.
DOI: 10.5281/zenodo.17250558
title: Daten der Notaufnahmesurveillance

description: Der Datensatz "Daten der Notaufnahmesurveillance" wird durch das Robert Koch-Institut und das AKTIN-Notaufnahmeregister bei Krankenhausaufnahmen bereitgestellt. Der Datensatz beinhaltet aggregierte Routinedaten aus deutschen Notaufnahmen zur syndromischen Überwachung von akuten Erkrankungen. Dazu zählen grippeähnliche Erkrankungen (ILI), Coronavirus-Erkrankungen (COVID-19), akute respiratorische Erkrankungen (ARE), gastrointestinale Infektionen (GI) und schwere akute respiratorische Infektionen (SARI). Dabei wird der relative Anteil dieser Erkrankungen an der Gesamtzahl der Notaufnahmevorstellungen sowie die berechneten Erwartungswerte und Prädiktionsintervalle ausgewiesen. Die Daten sind nach Notaufnahmetypen und Altersgruppen aggregiert. Damit bietet der Datensatz eine wertvolle Ressource für die Forschung im Bereich der Notfallmedizin und der Überwachung akuter Gesundheitsereignisse in Deutschland.
DOI: 10.15468/dl.6wxryr
title: Occurrence Download

description: A dataset containing 12 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Chama pacifica",
 "Country is Greece",
 "HasCoordinate is true"
 ]
}

 The dataset includes 12 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039745-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mkgjq9
title: Occurrence Download

description: A dataset containing 9 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Chama pacifica",
 "Country is Egypt",
 "HasCoordinate is true"
 ]
}

 The dataset includes 9 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039744-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.7pnrfv
title: Occurrence Download

description: A dataset containing 2313 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Ruppia",
 "Country is Spain"
 ]
}

 The dataset includes 2313 records from 71 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039746-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.zsphbx
title: Occurrence Download

description: A dataset containing 1009 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Observation, Machine Observation, Human Observation, Material sample, Material citation, Specimen, Living Specimen, Occurrence evidence)",
 "OccurrenceStatus is Present",
 "TaxonKey is Sargentodoxa cuneata (Oliv.) Rehder & E.H.Wilson"
 ]
}

 The dataset includes 1009 records from 32 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0046263-241126133413365/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.c6z49y
title: Occurrence Download

description: A dataset containing 149815 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Eristalis",
 "DatasetKey is iNaturalist Research-grade Observations",
 "HasCoordinate is true",
 "MediaType is Image"
 ]
}

 The dataset includes 149815 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039724-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.jgay8a
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Chama pacifica",
 "Country is Türkiye",
 "HasCoordinate is true"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039749-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kscwpx
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Chama pacifica",
 "Country is Syrian Arab Republic",
 "HasCoordinate is true"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039748-250920141307145/datasets/export for details.
DOI: 10.15468/dl.b56hjw
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Chama pacifica",
 "Country is Lebanon",
 "HasCoordinate is true"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039747-250920141307145/datasets/export for details.
DOI: 10.15468/dl.9etpsk
title: Occurrence Download

description: A dataset containing 106 records in GBIF matching the query:
SELECT "year", GBIF_EEARGCode( 1000, decimalLatitude, decimalLongitude, COALESCE(coordinateUncertaintyInMeters, 1000) ) AS eeaCellCode, classKey, class, genusKey, genus, COUNT(*) AS occurrences, MIN(COALESCE(coordinateUncertaintyInMeters, 1000)) AS minCoordinateUncertaintyInMeters, MIN(GBIF_TemporalUncertainty(eventDate, null)) AS minTemporalUncertainty FROM occurrence WHERE occurrenceStatus = 'PRESENT' AND genusKey IN (2284443, 2202786, 2161911, 2161467, 7652364, 2176168, 3092125, 2771094, 8782549, 2457378, 2453882, 2457825, 2454645, 2465626, 2466496, 2459675, 2444141, 2444221, 2447418, 2441658, 2442664, 3266899, 2473221, 2445496, 5221394, 2443339, 4553469) AND countrycode = 'BE' AND "year" &gt;= 1900 AND hasCoordinate = TRUE AND genusKey IS NOT NULL AND NOT ARRAY_CONTAINS(issue, 'ZERO_COORDINATE') AND NOT ARRAY_CONTAINS(issue, 'COORDINATE_OUT_OF_RANGE') AND NOT ARRAY_CONTAINS(issue, 'COORDINATE_INVALID') AND NOT ARRAY_CONTAINS(issue, 'COUNTRY_COORDINATE_MISMATCH') AND (LOWER(identificationVerificationStatus) NOT IN ( 'unverified', 'unvalidated', 'not validated', 'under validation', 'not able to validate', 'control could not be conclusive due to insufficient knowledge', 'uncertain', 'unconfirmed', 'unconfirmed - not reviewed', 'validation requested' ) OR identificationVerificationStatus IS NULL) AND COALESCE(coordinateUncertaintyInMeters, 1000) &lt;= 10000 GROUP BY "year", eeaCellCode, classKey, class, genusKey, genus ORDER BY "year" DESC, eeaCellCode ASC, genusKey ASC;

 The dataset's 106 records were derived from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0039712-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.17026/ar/zq3md3
title: Bureauonderzoek voor het plangebied Vliedorpsterweg te Houwerzijl (gemeente Het Hogeland)

description: In april 2025 is in opdracht van A. Hak Noord-Oost B.V. door Antea Group een archeologisch bureauonderzoek uitgevoerd voor plangebied Vliedorpsterweg in Houwerzijl (gemeente Het Hogeland). Aanleiding voor het onderzoek is het vervangen/aanleggen van laag- en middenspanningskabels en een gasleiding.

Het doel van het uitvoeren van een archeologisch bureauonderzoek is het opstellen van een gespecificeerde archeologische verwachting voor het plangebied. Voor het opstellen van een dergelijke verwachting wordt gebruik gemaakt van reeds bekende archeologische waarnemingen, historische kaarten, bodemkundige
gegevens en informatie over de landschappelijke situatie. Een gespecificeerde verwachting gaat in op de mogelijke aanwezigheid, het karakter, de omvang, datering en eventuele (mate van) verstoring van archeologische waarden binnen het plangebied.

Gezien de noordelijke zone waarin het plangebied pas na 1828, mogelijk na 1877 bedijkt is geraakt en daarvoor nog bestond uit een wad- en kweldergebied, worden geen archeologische resten verwacht van voor 1900. In ieder geval na 1909 is het gebied enkel in gebruik geweest voor landbouwdoeleinden, hiervoor bestond het enkel uit wad- en kwelder gebied. Gezien dat Vliedorpsterweg 13 gebouwd is in 1905 is het mogelijk dat het jaartal van 1909 bijgesteld moet worden naar 1905.

Advies Antea Group
Voor het gehele tracé wordt geadviseerd tot vrijgave op basis van een lage verwachting op bewoningsresten ouder dan circa 1828-1900.

Op 22 september is het bevoegd gezag, in dezen de gemeente Het Hogeland, akkoord gegaan met het advies tot vrijgave.
DOI: 10.6084/m9.figshare.30121735.v28
title: Logic 14 pdf NEW

description: Logic innovation
DOI: 10.15151/esrf-dc-2258945918
title: Halide binding by myeloperoxidase is regulated by access channel dynamics and charge interactions

description: The heme enzyme myeloperoxidase is a key player in the innate immune defense. It uses hydrogen peroxide to produce bactericidal hypohalous acids from (pseudo)halides, foremost chloride, and thiocyanate in the neutrophil phagosome. However, the available structural data on the halide-binding site, the marked pH dependence of halide oxidation, and the atypical pKa of an active-site histidine 261 fail to fully account for the mechanism of halide oxidation by myeloperoxidase. In the present study, crystal structures of myeloperoxidase-halide complexes show that halides can integrated into the hydrogen-bonding network formed by conserved water molecules, without directly interacting with the deprotonated histidine at both acidic and neutral pH. Molecular dynamics simulations reveal that protonation of histidine 261 decreases active site rigidity and increases the flexibility of arginine 405. Together with the terminal residues of the myeloperoxidase heavy and light chains, arginine 405 contributes to halide transport into the active site. Kinetic analyses and simulations further demonstrate that sodium ions play a critical role as charge shields, enabling halides to traverse the negatively charged access channel, which represents a key bottleneck for halide binding. Thus, halide access to the active site is governed by a complex interplay of electrostatic interactions involving both solvent ions and charged amino acid residues.