Influence of Extraction Duration on the Chemical Composition and Biological Activities of Essential Oil of Thymus pallescens de Noé (Record no. 50812)

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control field 20250625160155.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-16642
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245 10 - TITLE STATEMENT
Title Influence of Extraction Duration on the Chemical Composition and Biological Activities of Essential Oil of Thymus pallescens de Noé
490 0# - SERIES STATEMENT
Volume/sequential designation Arabian Journal for Science and Engineering, 40(7), p.1855-1865, 2015
520 3# - SUMMARY, ETC.
Summary, etc. Thymus pallescens de Noé essential oils were isolated from the plant's dried leaves, by hydrodistillation, with different distillation times (30 min, 1, 2 and 3 h). The essential oils compositions and their antioxidant, antimicrobial and insecticidal activities were examined. The chemical compositions of the oils were determined by GC and GC-MS. The antioxidant capacity was tested by four complementary methods: thiobarbituric acid reactive substances, ferric reducing power and scavenging of radicals DPPHo (2,2-diphenyl-1-picrylhydrazyl)and ABTSo+ [2,2?-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid)]. The antimicrobial activity was tested against three bacteria, two gram-positive (Staphylococcus aureus and Bacillus subtilis)and one gram-negative (Escherichia coli)and one yeast (Candida albicans). The insecticidal activity against confused flour beetle Tribolium confusum Jacquelin du Val (Coleoptera: Tenebrionidae)was evaluated using direct contact application and fumigant method. The predominant components in the oils were carvacrol (63.3-68.2 percent), ?-terpinene (6.9-9.1 percent), p-cymene (6.2-10.3 percent)and thymol (6.5-7.5 percent). The antioxidant activities were dependent on the time of hydrodistillation and the method used. The essential oils extracted for 30 min and 1 h were the most efficient against all the bacteria used. Toxicity tests against T. confusum showed that the oils isolated for 3 h and 30 min caused highest mortality with contact method and fumigant test, respectively. The results suggest that distillation time can determine the value of the oil designed to be applied to any biological material.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element BIOLOGICAL ACTIVITIES
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element ESSENTIAL OIL
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element HYDRODISTILLATION DURATION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element T. PALLESCENS
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Benchabane, O.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Hazzit, M.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Mouhouche, F.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Baaliouamer, A.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1Ur7Ar6Z1kYGY6x5wODC3ZWu6VTBkpdwd/view?usp=drivesdk">https://drive.google.com/file/d/1Ur7Ar6Z1kYGY6x5wODC3ZWu6VTBkpdwd/view?usp=drivesdk</a>
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-16642 25.06.2025 25.06.2025 Documentos solicitados