Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W1999406711', 'doi': 'https://doi.org/10.1002/(sici)1099-1565(199805/06)9:3<145::aid-pca393>3.0.co;2-k', 'title': 'Quantitative analysis of hop acids, essential oils and flavonoids as a clue to the identification of hop varieties', 'display_name': 'Quantitative analysis of hop acids, essential oils and flavonoids as a clue to the identification of hop varieties', 'publication_year': 1998, 'publication_date': '1998-05-01', 'ids': {'openalex': 'https://openalex.org/W1999406711', 'doi': 'https://doi.org/10.1002/(sici)1099-1565(199805/06)9:3<145::aid-pca393>3.0.co;2-k', 'mag': '1999406711'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1002/(sici)1099-1565(199805/06)9:3<145::aid-pca393>3.0.co;2-k', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S123408762', 'display_name': 'Phytochemical Analysis', 'issn_l': '0958-0344', 'issn': ['0958-0344', '1099-1565'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320595', 'host_organization_name': 'Wiley', 'host_organization_lineage': ['https://openalex.org/P4310320595'], 'host_organization_lineage_names': ['Wiley'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref'], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5014670497', 'display_name': 'Luc De Cooman', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I32597200', 'display_name': 'Ghent University', 'ror': 'https://ror.org/00cv9y106', 'country_code': 'BE', 'type': 'education', 'lineage': ['https://openalex.org/I32597200']}], 'countries': ['BE'], 'is_corresponding': False, 'raw_author_name': 'L. De Cooman', 'raw_affiliation_strings': ['University of Gent, Faculty of Pharmaceutical Sciences, Laboratory of Pharmacognosy and Phytochemistry, Harelbekestraat 72, B-9000 Gent, Belgium'], 'affiliations': [{'raw_affiliation_string': 'University of Gent, Faculty of Pharmaceutical Sciences, Laboratory of Pharmacognosy and Phytochemistry, Harelbekestraat 72, B-9000 Gent, Belgium', 'institution_ids': ['https://openalex.org/I32597200']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5050721608', 'display_name': 'E. Everaert', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I32597200', 'display_name': 'Ghent University', 'ror': 'https://ror.org/00cv9y106', 'country_code': 'BE', 'type': 'education', 'lineage': ['https://openalex.org/I32597200']}], 'countries': ['BE'], 'is_corresponding': False, 'raw_author_name': 'E. Everaert', 'raw_affiliation_strings': ['University of Gent, Faculty of Pharmaceutical Sciences, Laboratory of Pharmacognosy and Phytochemistry, Harelbekestraat 72, B-9000 Gent, Belgium'], 'affiliations': [{'raw_affiliation_string': 'University of Gent, Faculty of Pharmaceutical Sciences, Laboratory of Pharmacognosy and Phytochemistry, Harelbekestraat 72, B-9000 Gent, Belgium', 'institution_ids': ['https://openalex.org/I32597200']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5015562838', 'display_name': 'D. De Keukeleire', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I32597200', 'display_name': 'Ghent University', 'ror': 'https://ror.org/00cv9y106', 'country_code': 'BE', 'type': 'education', 'lineage': ['https://openalex.org/I32597200']}], 'countries': ['BE'], 'is_corresponding': False, 'raw_author_name': 'D. De Keukeleire', 'raw_affiliation_strings': ['University of Gent, Faculty of Pharmaceutical Sciences, Laboratory of Pharmacognosy and Phytochemistry, Harelbekestraat 72, B-9000 Gent, Belgium'], 'affiliations': [{'raw_affiliation_string': 'University of Gent, Faculty of Pharmaceutical Sciences, Laboratory of Pharmacognosy and Phytochemistry, Harelbekestraat 72, B-9000 Gent, Belgium', 'institution_ids': ['https://openalex.org/I32597200']}]}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 1, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': {'value': 3970, 'currency': 'USD', 'value_usd': 3970, 'provenance': 'doaj'}, 'apc_paid': None, 'fwci': 1.436, 'has_fulltext': True, 'fulltext_origin': 'ngrams', 'cited_by_count': 55, 'citation_normalized_percentile': {'value': 0.970051, 'is_in_top_1_percent': False, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 92, 'max': 93}, 'biblio': {'volume': '9', 'issue': '3', 'first_page': '145', 'last_page': '150'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T13798', 'display_name': 'Hops Chemistry and Applications', 'score': 0.9996, 'subfield': {'id': 'https://openalex.org/subfields/3004', 'display_name': 'Pharmacology'}, 'field': {'id': 'https://openalex.org/fields/30', 'display_name': 'Pharmacology, Toxicology and Pharmaceutics'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}, 'topics': [{'id': 'https://openalex.org/T13798', 'display_name': 'Hops Chemistry and Applications', 'score': 0.9996, 'subfield': {'id': 'https://openalex.org/subfields/3004', 'display_name': 'Pharmacology'}, 'field': {'id': 'https://openalex.org/fields/30', 'display_name': 'Pharmacology, Toxicology and Pharmaceutics'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}, {'id': 'https://openalex.org/T10908', 'display_name': 'Analytical Chemistry and Chromatography', 'score': 0.9632, 'subfield': {'id': 'https://openalex.org/subfields/1607', 'display_name': 'Spectroscopy'}, 'field': {'id': 'https://openalex.org/fields/16', 'display_name': 'Chemistry'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, {'id': 'https://openalex.org/T13128', 'display_name': 'Chromatography in Natural Products', 'score': 0.9619, 'subfield': {'id': 'https://openalex.org/subfields/1602', 'display_name': 'Analytical Chemistry'}, 'field': {'id': 'https://openalex.org/fields/16', 'display_name': 'Chemistry'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/humulus-lupulus', 'display_name': 'Humulus lupulus', 'score': 0.9793972}, {'id': 'https://openalex.org/keywords/capillary-gas-chromatography', 'display_name': 'Capillary gas chromatography', 'score': 0.4519843}], 'concepts': [{'id': 'https://openalex.org/C2779421835', 'wikidata': 'https://www.wikidata.org/wiki/Q104212', 'display_name': 'Humulus lupulus', 'level': 3, 'score': 0.9793972}, {'id': 'https://openalex.org/C25906391', 'wikidata': 'https://www.wikidata.org/wiki/Q1432381', 'display_name': 'Hop (telecommunications)', 'level': 2, 'score': 0.9614365}, {'id': 'https://openalex.org/C185592680', 'wikidata': 'https://www.wikidata.org/wiki/Q2329', 'display_name': 'Chemistry', 'level': 0, 'score': 0.92982066}, {'id': 'https://openalex.org/C43617362', 'wikidata': 'https://www.wikidata.org/wiki/Q170050', 'display_name': 'Chromatography', 'level': 1, 'score': 0.6142851}, {'id': 'https://openalex.org/C2777278459', 'wikidata': 'https://www.wikidata.org/wiki/Q170885', 'display_name': 'Essential oil', 'level': 2, 'score': 0.57013035}, {'id': 'https://openalex.org/C27438332', 'wikidata': 'https://www.wikidata.org/wiki/Q2873', 'display_name': 'Principal component analysis', 'level': 2, 'score': 0.5514461}, {'id': 'https://openalex.org/C2993697646', 'wikidata': 'https://www.wikidata.org/wiki/Q677065', 'display_name': 'Capillary gas chromatography', 'level': 3, 'score': 0.4519843}, {'id': 'https://openalex.org/C123460561', 'wikidata': 'https://www.wikidata.org/wiki/Q677065', 'display_name': 'Gas chromatography', 'level': 2, 'score': 0.37950078}, {'id': 'https://openalex.org/C31903555', 'wikidata': 'https://www.wikidata.org/wiki/Q1637030', 'display_name': 'Food science', 'level': 1, 'score': 0.30090025}, {'id': 'https://openalex.org/C154945302', 'wikidata': 'https://www.wikidata.org/wiki/Q11660', 'display_name': 'Artificial intelligence', 'level': 1, 'score': 0.052281976}, {'id': 'https://openalex.org/C31258907', 'wikidata': 'https://www.wikidata.org/wiki/Q1301371', 'display_name': 'Computer network', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C41008148', 'wikidata': 'https://www.wikidata.org/wiki/Q21198', 'display_name': 'Computer science', 'level': 0, 'score': 0.0}, {'id': 'https://openalex.org/C2776242653', 'wikidata': 'https://www.wikidata.org/wiki/Q22907699', 'display_name': 'Pepper', 'level': 2, 'score': 0.0}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1002/(sici)1099-1565(199805/06)9:3<145::aid-pca393>3.0.co;2-k', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S123408762', 'display_name': 'Phytochemical Analysis', 'issn_l': '0958-0344', 'issn': ['0958-0344', '1099-1565'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310320595', 'host_organization_name': 'Wiley', 'host_organization_lineage': ['https://openalex.org/P4310320595'], 'host_organization_lineage_names': ['Wiley'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 0, 'referenced_works': [], 'related_works': ['https://openalex.org/W3128448123', 'https://openalex.org/W2470825704', 'https://openalex.org/W2375972190', 'https://openalex.org/W2076653642', 'https://openalex.org/W2053556147', 'https://openalex.org/W2046245575', 'https://openalex.org/W2043804978', 'https://openalex.org/W2041764670', 'https://openalex.org/W2015445519', 'https://openalex.org/W1999406711'], 'abstract_inverted_index': {'The': [0], 'hop': [1, 11, 42, 76], 'acids,': [2], 'the': [3, 7, 10, 38, 41, 45, 57, 63], 'essential': [4, 58], 'oils': [5], 'and': [6, 18, 44], 'flavonoids': [8], 'of': [9, 40, 62], '(Humulus': [12], 'lupulus': [13], 'L.)': [14], 'varieties': [15], 'Saaz,': [16], 'Nugget': [17], 'Wye': [19], 'Target': [20], 'have': [21], 'been': [22], 'studied': [23], 'for': [24, 37], 'cultivar': [25], 'identification.': [26], 'Optimised': [27], 'reverse': [28], 'phase-high': [29], 'performance': [30], 'liquid': [31], 'chromatographic': [32, 65], 'separations': [33], 'were': [34], 'carried': [35], 'out': [36], 'analysis': [39, 70], 'acids': [43], 'flavonoids,': [46], 'whereas': [47], 'capillary': [48], 'gas': [49], 'chromatography': [50], 'was': [51], 'applied': [52], 'in': [53], 'order': [54], 'to': [55, 74], 'characterize': [56], 'oils.': [59], 'Appropriate': [60], 'handling': [61], 'quantitative': [64], 'data': [66], 'by': [67], 'principal': [68], 'component': [69], 'provided': [71], 'a': [72], 'clue': [73], 'differentiate': [75], 'varieties.': [77], '©': [78], '1998': [79], 'John': [80], 'Wiley': [81], '&': [82], 'Sons,': [83], 'Ltd.': [84]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W1999406711', 'counts_by_year': [{'year': 2024, 'cited_by_count': 2}, {'year': 2023, 'cited_by_count': 2}, {'year': 2022, 'cited_by_count': 2}, {'year': 2021, 'cited_by_count': 1}, {'year': 2020, 'cited_by_count': 2}, {'year': 2019, 'cited_by_count': 4}, {'year': 2018, 'cited_by_count': 4}, {'year': 2017, 'cited_by_count': 2}, {'year': 2016, 'cited_by_count': 3}, {'year': 2015, 'cited_by_count': 2}, {'year': 2014, 'cited_by_count': 2}, {'year': 2013, 'cited_by_count': 4}, {'year': 2012, 'cited_by_count': 4}], 'updated_date': '2024-12-12T03:39:00.836835', 'created_date': '2016-06-24'}