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Titre : Huiles essentielles de trois espèces d’Eucalyptus d’Algérie : composition et activité acaricide (Varroa destructor). Type de document : texte imprimé Auteurs : Ghania Atmani – Merabet, Auteur ; Abdelmalik Belkhiri, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 177 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Eucalyptus spp huile essentielle toxicité BSL Test CPG/SM Varroa destructor essential oil toxicity GC/MS ????? ??????? ??????? ?????? ??????? ????????? Index. décimale : 540 Chimie et sciences connexes Résumé : The study was aimed to determine the chemical composition, toxicity effect and field
varroacidal efficacy of essential oil from leaf of Eucalyptus robusta (Er), Eucalyptus
sideroxylon (Es) and Eucalyptus globulus (Eg) grown in Algeria. The brine shrimp lethality (BSL) assay and bee hives infected by Varroa destructor were used to assess the toxicity and acaricidal effect, respectively. Steam distillation of (Er), (Es) and (Eg) leaves yielded 0.83%, 1.09 % and 0.93% (v/w) of essential oil (EO) respectively. GC/MS Analysis revealed 13 compounds for (Er), 36 for (Es) and 39 for (Eg). The main constituents for Er EO were 1,8-cineole (65,97%), p-cymene (7,83%) and o-cymene (4,75%), for Es EO 1,8-cineole (20,57%),octane (4.83%) and p-cymene (1,35%), and for Eg EO, 1,8-cineole (78.45 %), o-cymene (2.18 %), and isopinocarveole (1.74 %). The BSL assay of Er EO, Es EO and Eg EO revealed a highly toxic value of LC50 (µg/ml): 9.42, 34.80 and 67.55 respectively. Furthermore, field efficacy testing on bee hives infected with Varroa destructor has confirmed the effectiveness of Eucalyptus robusta essential oil (Er EO), (Es EO) and (Eg EO) and thymol (p < 0, 05) as varroacidal agents. Moreover (EEO + thymol) association was more effective than EEO or thymol alone. Finally the use of (EEO + thymol) may constitute a viable alternative to the thymol based commercial treatment.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/ATM7372.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11022 Huiles essentielles de trois espèces d’Eucalyptus d’Algérie : composition et activité acaricide (Varroa destructor). [texte imprimé] / Ghania Atmani – Merabet, Auteur ; Abdelmalik Belkhiri, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 177 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Eucalyptus spp huile essentielle toxicité BSL Test CPG/SM Varroa destructor essential oil toxicity GC/MS ????? ??????? ??????? ?????? ??????? ????????? Index. décimale : 540 Chimie et sciences connexes Résumé : The study was aimed to determine the chemical composition, toxicity effect and field
varroacidal efficacy of essential oil from leaf of Eucalyptus robusta (Er), Eucalyptus
sideroxylon (Es) and Eucalyptus globulus (Eg) grown in Algeria. The brine shrimp lethality (BSL) assay and bee hives infected by Varroa destructor were used to assess the toxicity and acaricidal effect, respectively. Steam distillation of (Er), (Es) and (Eg) leaves yielded 0.83%, 1.09 % and 0.93% (v/w) of essential oil (EO) respectively. GC/MS Analysis revealed 13 compounds for (Er), 36 for (Es) and 39 for (Eg). The main constituents for Er EO were 1,8-cineole (65,97%), p-cymene (7,83%) and o-cymene (4,75%), for Es EO 1,8-cineole (20,57%),octane (4.83%) and p-cymene (1,35%), and for Eg EO, 1,8-cineole (78.45 %), o-cymene (2.18 %), and isopinocarveole (1.74 %). The BSL assay of Er EO, Es EO and Eg EO revealed a highly toxic value of LC50 (µg/ml): 9.42, 34.80 and 67.55 respectively. Furthermore, field efficacy testing on bee hives infected with Varroa destructor has confirmed the effectiveness of Eucalyptus robusta essential oil (Er EO), (Es EO) and (Eg EO) and thymol (p < 0, 05) as varroacidal agents. Moreover (EEO + thymol) association was more effective than EEO or thymol alone. Finally the use of (EEO + thymol) may constitute a viable alternative to the thymol based commercial treatment.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/ATM7372.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11022 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ATM/7372 ATM/7372 Thèse Bibliothèque principale Thèses Disponible فصل وتحديد بنى نواتج الأيض الثانوي لنبتتين صحراويتين Warionia saharae وPeriploca laevigata. / سامية مزهود
Titre : فصل وتحديد بنى نواتج الأيض الثانوي لنبتتين صحراويتين Warionia saharae وPeriploca laevigata. Type de document : texte imprimé Auteurs : سامية مزهود, Auteur ; رتيبة مكيو, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 187 ورقة. Format : 30 سم. Note générale : 2نسخ موجودة مكتبة المركزية
Langues : Arabe (ara) Catégories : Arabe
الكيمياء و العلوم ذات العلاقةTags : ??????????? ????????????? ????? ????????? ???????? ??????? ??????? ?????? ???????? (.
Warionia scharae Coss. & Dur. Periploca laevigata Aiton coumarins flavonoïds, phenolic acids antioxidant activity GC-MS essential oil coumarines flavonoïdes acides phénoliques activité antioxydante GC/MS huiles essentiellesIndex. décimale : 540 الكيمياء و العلوم ذات العلاقة Résumé : This work is devoted to the phytochemical and biological study of two Saharan species used in traditional medicine, the first Warionia saharae (Asteraceae), the second Periploca laevigata belonging to Asclepiadaceae family.
The phytochemical investigation of chloroform, ethyl acetate and n-butanol extracts from the aerial parts of W. saharae allowed the isolation and identification of 13 products belonging to several classes of secondary metabolites (sterols, coumarins, flavonoids and dicaffeoylquinic acid) isolated for the first time from this species excepted one flavonoid (hispidulin). The nbutanol extract of P. laevigata allowed the isolation and identification of 4 flavonoids glycosides. The structural elucidation of the isolated compounds was carried out by combining the various spectroscopic methods (UV, 1D & 2D NMR, ESIMS), acid hydrolysis as well as by comparing the results with the literature data.
The antioxidant activity of the EtOAc extract of W. saharae was evaluated by the free radical
scavenging method (DPPH) and the inhibition of lipid peroxidation (LPO). The EtOAc extract exhibited a strong effect with the IC50 value )6,90 ± 8,0 µg/ml( compared to the standard ) 3, 5 µ 8,21 μg/ml) and the inhibition of lipid peroxidation ) 2 ,9 µ8,6 ± g/ml(. The quantification of the total polyphenols and total flavonoids of the EtOAc and n-BuOH extracts of P. laevigata was performed by colorimetric methods. This step showed a content of polyphenols and flavonoids more important in the n-butanol extract. The antioxidant activity was evaluated by the free radical scavenging method (DPPH). The n-BuOH extract exhibited the strongest effect with the IC50 value 5,9 μg/ml comparatively with ascorbic acid used as standard IC50 (IC50 = 4,65 μg/ml) utilisé comme.
The analysis of essential oil of leaves and flowers of W. saharae by the GC/MS technique, showed a different chemical composition when compared with author works. are described for the first time. De même, the analysis of the essential oil of the aerial parts of P. laevigata by GC/MS, showed a different chemical composition.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/AMEZ4318.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10876 فصل وتحديد بنى نواتج الأيض الثانوي لنبتتين صحراويتين Warionia saharae وPeriploca laevigata. [texte imprimé] / سامية مزهود, Auteur ; رتيبة مكيو, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 187 ورقة. ; 30 سم.
2نسخ موجودة مكتبة المركزية
Langues : Arabe (ara)
Catégories : Arabe
الكيمياء و العلوم ذات العلاقةTags : ??????????? ????????????? ????? ????????? ???????? ??????? ??????? ?????? ???????? (.
Warionia scharae Coss. & Dur. Periploca laevigata Aiton coumarins flavonoïds, phenolic acids antioxidant activity GC-MS essential oil coumarines flavonoïdes acides phénoliques activité antioxydante GC/MS huiles essentiellesIndex. décimale : 540 الكيمياء و العلوم ذات العلاقة Résumé : This work is devoted to the phytochemical and biological study of two Saharan species used in traditional medicine, the first Warionia saharae (Asteraceae), the second Periploca laevigata belonging to Asclepiadaceae family.
The phytochemical investigation of chloroform, ethyl acetate and n-butanol extracts from the aerial parts of W. saharae allowed the isolation and identification of 13 products belonging to several classes of secondary metabolites (sterols, coumarins, flavonoids and dicaffeoylquinic acid) isolated for the first time from this species excepted one flavonoid (hispidulin). The nbutanol extract of P. laevigata allowed the isolation and identification of 4 flavonoids glycosides. The structural elucidation of the isolated compounds was carried out by combining the various spectroscopic methods (UV, 1D & 2D NMR, ESIMS), acid hydrolysis as well as by comparing the results with the literature data.
The antioxidant activity of the EtOAc extract of W. saharae was evaluated by the free radical
scavenging method (DPPH) and the inhibition of lipid peroxidation (LPO). The EtOAc extract exhibited a strong effect with the IC50 value )6,90 ± 8,0 µg/ml( compared to the standard ) 3, 5 µ 8,21 μg/ml) and the inhibition of lipid peroxidation ) 2 ,9 µ8,6 ± g/ml(. The quantification of the total polyphenols and total flavonoids of the EtOAc and n-BuOH extracts of P. laevigata was performed by colorimetric methods. This step showed a content of polyphenols and flavonoids more important in the n-butanol extract. The antioxidant activity was evaluated by the free radical scavenging method (DPPH). The n-BuOH extract exhibited the strongest effect with the IC50 value 5,9 μg/ml comparatively with ascorbic acid used as standard IC50 (IC50 = 4,65 μg/ml) utilisé comme.
The analysis of essential oil of leaves and flowers of W. saharae by the GC/MS technique, showed a different chemical composition when compared with author works. are described for the first time. De même, the analysis of the essential oil of the aerial parts of P. laevigata by GC/MS, showed a different chemical composition.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/AMEZ4318.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10876 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité مزه/4318 مزه/4318 Thèse Bibliothèque principale Thèses Disponible
