{"doi":"10.5254/1.3546479","title":"Ficus Elastica and Castilloa Latices","abstract":"<jats:title>Abstract</jats:title>\n        <jats:p>Although for all intents and purposes the <jats:italic>Hevea Brasiliensis</jats:italic> or Para rubber tree is the only rubber-yielding tree at present cultivated, this was not always the case. Today the words rubber and latex are almost synonymous with Para rubber and Para latex, but there was a time when rubber from other sources was available and the quality of commercial raw rubber showed very large variations. <jats:italic>HEVEA</jats:italic> LATEX AN EXCEPTIONAL TYPE Owing to the present predominance of rubber from <jats:italic>Hevea Brasiliensis</jats:italic>, almost all chemical investigations have been concentrated on the latex from this tree and the rubber therefrom, and a position has been reached which tends to the assumption that <jats:italic>Hevea</jats:italic> latex and rubber are the normal types, while others are abnormal. Thus, as is well known, <jats:italic>Hevea</jats:italic> latex is readily coagulated by a very small addition of an electrolyte and coagulates spontaneously in the country of origin in about 12 or 14 hours unless an antiseptic or preservative be added. It is therefore assumed that a latex which is not readily coagulated by electrolytes or does not coagulate spontaneously is abnormal whereas as a fact, the reverse is the case. If an examination is made of latices of other botanical origin, rich in hydrocarbon, it will be found that the best known of these are not coagulated either spontaneously or with the aid of electrolytes. Consequently it may be concluded that <jats:italic>Hevea</jats:italic> latex is exceptional and abnormal. Unfortunately much of the data in regard to other latices is scanty and unreliable. Only in a few instances have we the records of trained chemists. Most of the information is based on statements of observers without scientific training or at least without adequate chemical experience. Therefore any contribution to our knowledge of latices other than that of <jats:italic>Hevea</jats:italic> is very welcome.</jats:p>","journal":"Rubber Chemistry and Technology","year":1939,"id":30102,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":0,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":164340,"name":"Henry P. Stevens","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":0.0,"endowment":0.0,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"24523987","pmcid":null,"openalex_id":"https://openalex.org/W2314746342","authors":[],"funders":[],"total_grants":0,"fwci":0.0,"citation_percentile":0.17933723,"influential_citations":0,"citation_trend":[],"oa_status":"closed","license":null,"oa_locations":[{"url":"https://rct.kglmeridian.com/view/journals/rcat/12/4/article-p688.xml","host_type":"publisher"},{"url":"http://meridian.allenpress.com/rct/article-pdf/12/4/688/1927704/1_3546479.pdf","host_type":"publisher"},{"url":"https://rct.kglmeridian.com/downloadpdf/journals/rcat/12/4/article-p688.xml","host_type":"publisher"},{"url":"https://doi.org/10.5254/1.3546479","host_type":"journal"}],"fields_of_study":["Plant biochemistry and biosynthesis","Agricultural and Food Sciences","Materials Science"],"mesh_terms":[],"keywords":["Hevea brasiliensis","Hevea","Natural rubber","Neoprene","Pulp and paper industry","Materials science","Polymer science","Composite material","Engineering"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Life in Land"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-09T01:48:34.915234Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}