cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.tzgn1a
title: Occurrence Download

description: A dataset containing 85 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dyschoriste lavandulacea (Nees) Kuntze"
 ]
}

 The dataset includes 85 records from 17 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002008-171113114016250/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.3s3hy2
title: Occurrence Download

description: A dataset containing 6 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Psammisia glandulolaminata Pedraza"
 ]
}

 The dataset includes 6 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0185800-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.hj4qep
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dianthus woroschilovii Barkalov & Prob."
 ]
}

 The dataset includes 2 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0172312-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.vtjzh9
title: Occurrence Download

description: A dataset containing 61 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Pomacea insularum (Orbigny, 1835)"
 ]
}

 The dataset includes 61 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0249419-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.8ztzdf
title: Occurrence Download

description: A dataset containing 5 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Piper arundinetorum Trel."
 ]
}

 The dataset includes 5 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0185801-240321170329656/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.eccv73
title: Occurrence Download

description: A dataset containing 85 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dianthus webbianus Parl. ex Vis."
 ]
}

 The dataset includes 85 records from 28 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0172311-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.hxksod
title: Occurrence Download

description: A dataset containing 785 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Elevation 1000.0-3321.0m",
 "Year 1990-2017",
 "HasCoordinate is true",
 "TaxonKey is Myadestes ralloides (Orbigny, 1840)",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 785 records from 30 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002008-171219132708484/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.w7e8dq
title: Occurrence Download

description: A dataset containing 4922 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Leonurus japonicus Houtt."
 ]
}

 The dataset includes 4922 records from 190 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0249438-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.5pjbkg
title: Occurrence Download

description: A dataset containing 10789 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is Centre d'Estudis Avançats de Blanes. Limnological Observatory of the Pyrenees - Diatomeas de lagos pirenaícos"
 ]
}

 The dataset includes 10789 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002008-180131172636756/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.fxz45b
title: Occurrence Download

description: A dataset containing 415 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Diaperia candida (Torr. & A.Gray) Benth., Hook.fil. & Gen.Pl."
 ]
}

 The dataset includes 415 records from 57 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0172318-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.w9aafu
title: Occurrence Download

description: A dataset containing 54790 species occurrences available in GBIF matching the query:
{
 "and" : [
 "OccurrenceStatus is Present",
 "TaxonKey is Marrubium vulgare L."
 ]
}

 The dataset includes 54790 records from 490 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0249450-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.qkdne4
title: Occurrence Download

description: A dataset containing 401 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Colletes algarobiae Cockerell, 1900",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 401 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002009-150330110031120/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wav6wf
title: Occurrence Download

description: A dataset containing 2028 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Diaperia verna (Raf.) Morefield"
 ]
}

 The dataset includes 2028 records from 81 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0172325-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.awyy2c
title: Occurrence Download

description: A dataset containing 340 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Maihuenia (Phil. ex F.A.C.Weber) Schum."
 ]
}

 The dataset includes 340 records from 32 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027051-190918142434337/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.epwyqv
title: Occurrence Download

description: A dataset containing 14974 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Arthropoda",
 "Country is Sri Lanka"
 ]
}

 The dataset includes 14974 records from 118 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002009-150504100648427/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.w7zp42
title: Occurrence Download

description: A dataset containing 10 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Rhipidoglossum arbonnieri (Geerinck) Eb.Fisch., Killmann, J.-P.Lebel & Delep."
 ]
}

 The dataset includes 10 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0172326-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.klhmry
title: Occurrence Download

description: A dataset containing 3803 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Rubus sanctus Schreb."
 ]
}

 The dataset includes 3803 records from 54 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027067-190918142434337/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.qjdfbc
title: Occurrence Download

description: A dataset containing 73 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Adansonia grandidieri Baill."
 ]
}

 The dataset includes 73 records from 15 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002009-150811131857512/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.7mmnfs
title: Occurrence Download

description: A dataset containing 443 species occurrences available in GBIF matching the query:
{
 "and" : [
 "OccurrenceStatus is Present",
 "TaxonKey is Brachyphylla nana Miller, 1902"
 ]
}

 The dataset includes 443 records from 21 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0249460-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.5x8658
title: Occurrence Download

description: A dataset containing 9543 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is Colección de Mamíferos del Instituto de Investigación de Recursos Biológicos Alexander von Humboldt (IAvH-M)"
 ]
}

 The dataset includes 9543 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0172345-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48323/qcmjk-2a080
title: MS_Exploris_2024_January

description: Exploris 480 + Vanquish Neo:
Andrew SP3 Automation
Histones PRM
NLI02AT
STandards
DOI: 10.15468/dl.yi3k2o
title: Occurrence Download

description: A dataset containing 250 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Phaethon aethereus",
 "Country is Mexico",
 "Geometry POLYGON((-117.070312 32.694865,-117.070312 19.145168,-105.996093 19.145168,-105.996093 32.694865,-117.070312 32.694865))"
 ]
}

 The dataset includes 250 records from 12 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002009-150912100344238/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wrge5z
title: Occurrence Download

description: A dataset containing 1718 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Diaperia prolifera (Nutt. ex DC.) Nutt."
 ]
}

 The dataset includes 1718 records from 71 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0172324-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.y2eq9z
title: Occurrence Download

description: A dataset containing 25 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Beaucarnea compacta L.Hern. & Zamudio"
 ]
}

 The dataset includes 25 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0249474-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.89imvc
title: Occurrence Download

description: A dataset containing 82 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Pennisetum setaceum (Forssk.) Chiov.",
 "Country is South Africa"
 ]
}

 The dataset includes 82 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002009-150922153815467/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.b3eg5p
title: Occurrence Download

description: A dataset listing the 24523 species recorded in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "PublishingCountry is Colombia",
 {
 "and" : [
 "Country is Colombia",
 {
 "not" : {
 "Issue" : [
 "is Country coordinate mismatch"
 ]
 }
 }
 ]
 }
 ]
 },
 "StateProvince is one of (cundinamarca)"
 ]
}

 The dataset's 24523 records were derived from 692 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0172319-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48597/4paj-r2r9
title: Measurement of PAHs (polycyclic aromatic hydrocarbons, 16) at De Zilk

description: Measurement of PAHs (polycyclic aromatic hydrocarbons, 16) at De Zilk
DOI: 10.48597/58yx-pgkw
title: Measurement of Carbon_monoxide at Cabauw Wielsekade

description: Measurement of Carbon_monoxide at Cabauw Wielsekade
DOI: 10.48597/5y3h-d567
title: Measurement of Inorganics in precipitation at Diabla Gora

description: Measurement of Inorganics in precipitation at Diabla Gora
DOI: 10.5281/zenodo.10776384
title: Effect of basket height and stocking density on production of the sea urchin Tripneustes gratilla

description: Dataset corresponding to the manuscript "Effects of basket height and stocking density on production of the sea urchin Tripneustes gratilla: insights and recommendations", where two trials were conducted. Trial 1: 3-month grow-out using Ulva as feed; Trial 2: 2-month gonad enhancement trial using formulated feed (pellets). Datasheets correspond to figures included in the manuscript.

Funders included the National Research Foundation (NRF) Research and Technology Fund [RTF15042311753] and the EU Horizon 2020 Research & Innovation Programme ASTRAL Project under Grant Agreement No. 863034.
DOI: 10.5281/zenodo.10776385
title: Effect of basket height and stocking density on production of the sea urchin Tripneustes gratilla

description: Dataset corresponding to the manuscript "Effects of basket height and stocking density on production of the sea urchin Tripneustes gratilla: insights and recommendations", where two trials were conducted. Trial 1: 3-month grow-out using Ulva as feed; Trial 2: 2-month gonad enhancement trial using formulated feed (pellets). Datasheets correspond to figures included in the manuscript.

Funders included the National Research Foundation (NRF) Research and Technology Fund [RTF15042311753] and the EU Horizon 2020 Research & Innovation Programme ASTRAL Project under Grant Agreement No. 863034.
DOI: 10.48597/7wkp-63ub
title: Measurement of Ozone at De Zilk

description: Measurement of Ozone at De Zilk
DOI: 10.48597/8q22-v5p2
title: Measurement of Ozone at Kollumerwaard

description: Measurement of Ozone at Kollumerwaard
DOI: 10.48597/bbbz-2cv7
title: Measurement of PAHs (polycyclic aromatic hydrocarbons, 16) at Diabla Gora

description: Measurement of PAHs (polycyclic aromatic hydrocarbons, 16) at Diabla Gora
DOI: 10.48597/e8rv-h94f
title: Measurement of Conductivity at Stará Lesná

description: Measurement of Conductivity at Stará Lesná
DOI: 10.48597/f4v8-svt4
title: Measurement of Ozone at Eibergen

description: Measurement of Ozone at Eibergen
DOI: 10.48597/hn8f-ats5
title: Measurement of Heavy metals and pm10_mass at Topolniky

description: Measurement of Heavy metals and pm10_mass at Topolniky
DOI: 10.48597/hsdc-xf5b
title: Measurement of Heavy metals at Vredepeel

description: Measurement of Heavy metals at Vredepeel
DOI: 10.48597/hthh-vz2h
title: Measurement of Heavy metals at Diabla Gora

description: Measurement of Heavy metals at Diabla Gora
DOI: 10.48597/m7kq-gme9
title: Measurement of Inorganics in precipitation at De Zilk

description: Measurement of Inorganics in precipitation at De Zilk
DOI: 10.48597/mu8g-2b4h
title: Measurement of Inorganics in precipitation at De Zilk

description: Measurement of Inorganics in precipitation at De Zilk
DOI: 10.48597/mza8-95wr
title: Measurement of Inorganics in air and particle phase at Iskrba

description: Measurement of Inorganics in air and particle phase at Iskrba
DOI: 10.48597/nvxu-bt68
title: Measurement of PAHs (polycyclic aromatic hydrocarbons, 16) at Zielonka

description: Measurement of PAHs (polycyclic aromatic hydrocarbons, 16) at Zielonka
DOI: 10.48597/p367-bk9j
title: Measurement of Ozone at Vredepeel

description: Measurement of Ozone at Vredepeel
DOI: 10.48597/q7mk-pw9w
title: Measurement of Inorganics in air and particle phase at Vredepeel

description: Measurement of Inorganics in air and particle phase at Vredepeel
DOI: 10.48597/qtds-nr5f
title: Measurement of Heavy metals at Zielonka

description: Measurement of Heavy metals at Zielonka
DOI: 10.48597/rbc8-jmyq
title: Measurement of Ozone at Cabauw Wielsekade

description: Measurement of Ozone at Cabauw Wielsekade
DOI: 10.48597/s72f-86kn
title: Measurement of Conductivity at Starina

description: Measurement of Conductivity at Starina
DOI: 10.48597/surf-sv2e
title: Measurement of Precipitation_amount at Stará Lesná

description: Measurement of Precipitation_amount at Stará Lesná
DOI: 10.6084/m9.figshare.23736381
title: Data from Coiro & Seyfullah

description: The scripts for generating the morphospaces (01.morphospace.R), the DTT plots (02.DTT_wholetree.R), the rate analyses (03.rates.R), the DTT plots over 100 posterior trees (04.DTT_100sample.R), and the time series analyses (05.Time_series.R) are included. <br>The 'data' folder containts all the data needed for running the scripts, namely:- cond.tre = consensus tree file from Coiro et al. (2023).- sample100 = sample of 100 trees from the posterior sample of Coiro et al. (2023).- Matrix_20230214 = morphological matrix.- FADLAD.csv = FADLAD data for the tip-only analysis.- timeseries.csv = data for the time series analysis, including bootstrap median data for sum of variance and median centroid distance, Temperature, and CO2.<br>The 'data' folder also contains a nexus version of the Morphological matrix with characters annotated and readable by Mesquite (Matrix_ann_20230214)<br><br>
DOI: 10.6084/m9.figshare.25368061
title: Supplement Material for: Genomic signatures of chromosomal instability and osteosarcoma progression detected by high resolution array CGH and interphase FISH

description:  Osteosarcoma (OS) is characterized by an unstable karyotype which typically has a heterogeneous pattern of complex chromosomal abnormalities. High-resolution array comparative genomic hybridization (CGH) in combination with interphase fluorescence in situ hybridization (FISH) analyses provides a complete description of genomic imbalances together with an evaluation of the contribution of cell-to-cell variation to copy number changes. There have been no analyses to date documenting genomic signatures consistent with chromosomal instability mechanisms in OS tumors using array CGH. In this study, we utilized high-resolution array CGH to identify and characterize recurrent signatures of genomic imbalances using ten OS tumors. Comparison between the genomic profiles identified tumor groups with low, intermediate and high levels of genomic imbalance. Bands 6p22→p21, 8q24 and 17p12→ p11.2 were consistently involved in high copy gain or amplification events. Since these three locations have been consistently associated with OS oncogenesis, FISH probes from each cytoband were used to derive an index of cellular heterogeneity for copy number within each region. OS with the highest degree of genomic imbalance also exhibited the most extreme cell-to-cell copy number variation. Significantly, the three OS with the most imbalance and genomic copy number heterogeneity also had the poorest response to preoperative chemotherapy. This genome wide analysis is the first utilizing oligonucleotide array CGH in combination with FISH analysis to derive genomic signatures of chromosomal instability in OS tumors by studying genomic imbalance and intercellular heterogeneity. This comprehensive genomic screening approach provides important insights concerning the mechanisms responsible for generating complex genomes. The resulting phenotypic diversity can generate tumors with a propensity for an aggressive disease course. A better understanding of the underlying mechanisms leading to OS tumor development could result in the identification of prognostic markers and therapeutic targets.
DOI: 10.48597/tkdv-gxhy
title: Measurement of Inorganics in air and particle phase at K-puszta

description: Measurement of Inorganics in air and particle phase at K-puszta
DOI: 10.48597/wsfz-tqqx
title: Measurement of Ammonium at Starina

description: Measurement of Ammonium at Starina
DOI: 10.48597/y6r5-by7m
title: Measurement of Inorganics in air and particle phase at De Zilk

description: Measurement of Inorganics in air and particle phase at De Zilk
DOI: 10.48597/2fqm-bxuh
title: Measurement of PCB_199 at Alert

description: Measurement of PCB_199 at Alert
DOI: 10.48597/2gc4-sbq7
title: Measurement of PCB_128 at Alert

description: Measurement of PCB_128 at Alert
DOI: 10.48597/2ujr-hgrn
title: Measurement of PCB_95 at Alert

description: Measurement of PCB_95 at Alert
DOI: 10.48597/2uxa-fmcm
title: Measurement of PCB_66 at Alert

description: Measurement of PCB_66 at Alert
DOI: 10.48597/2ygu-nyeh
title: Measurement of PCB_4+10 at Alert

description: Measurement of PCB_4+10 at Alert
DOI: 10.48597/33k6-s83f
title: Measurement of PCB_185 at Alert

description: Measurement of PCB_185 at Alert
DOI: 10.48597/4kdc-u489
title: Measurement of PCB_174 at Alert

description: Measurement of PCB_174 at Alert
DOI: 10.48597/5ajc-vr7h
title: Measurement of PCB_118 at Alert

description: Measurement of PCB_118 at Alert
DOI: 10.48597/5r9d-uud5
title: Measurement of PCB_196+203 at Alert

description: Measurement of PCB_196+203 at Alert
DOI: 10.48597/63pa-frnu
title: Measurement of PCB_180 at Alert

description: Measurement of PCB_180 at Alert
DOI: 10.48597/6wkx-98kd
title: Measurement of PCB_138 at Alert

description: Measurement of PCB_138 at Alert
DOI: 10.48597/72dw-bpu7
title: Measurement of PCB_19 at Alert

description: Measurement of PCB_19 at Alert
DOI: 10.48597/7fhr-xwn7
title: Measurement of PCB_6 at Alert

description: Measurement of PCB_6 at Alert
DOI: 10.48597/7u8z-a8yg
title: Measurement of PCB_172+197 at Alert

description: Measurement of PCB_172+197 at Alert
DOI: 10.48597/83kb-z8nw
title: Measurement of PCB_180 at Alert

description: Measurement of PCB_180 at Alert
DOI: 10.48597/8e7k-6z6c
title: Measurement of PCB_31 at Alert

description: Measurement of PCB_31 at Alert
DOI: 10.48597/8j4c-jrxc
title: Measurement of PCB_171 at Alert

description: Measurement of PCB_171 at Alert
DOI: 10.48597/9c77-95r4
title: Measurement of PCB_198 at Alert

description: Measurement of PCB_198 at Alert
DOI: 10.48597/9gqc-swxh
title: Measurement of PCB_170 at Alert

description: Measurement of PCB_170 at Alert
DOI: 10.48597/9jtc-epxs
title: Measurement of PCB_16+32 at Alert

description: Measurement of PCB_16+32 at Alert
DOI: 10.48597/9mq2-gsv7
title: Measurement of PCB_18 at Alert

description: Measurement of PCB_18 at Alert
DOI: 10.48597/a3ug-fk6r
title: Measurement of PCB_180 at Alert

description: Measurement of PCB_180 at Alert
DOI: 10.48597/b7ue-ek4v
title: Measurement of PCB_44 at Alert

description: Measurement of PCB_44 at Alert
DOI: 10.48597/bchw-d8nx
title: Measurement of PCB_178+129 at Alert

description: Measurement of PCB_178+129 at Alert
DOI: 10.48597/bh7u-hg7c
title: Measurement of PCB_49 at Alert

description: Measurement of PCB_49 at Alert
DOI: 10.48597/c7tx-3ewd
title: Measurement of PCB_146 at Alert

description: Measurement of PCB_146 at Alert
DOI: 10.48597/cmvf-qdyv
title: Measurement of PCB_18 at Alert

description: Measurement of PCB_18 at Alert