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Partager le résultat de cette recherche Interroger des sources externesNouvelle génération de Chélatants acides phénols méthyle phosphoriques. propriétés thermodynamiques et spectroscopiques / Salah Chafaa
Titre : Nouvelle génération de Chélatants acides phénols méthyle phosphoriques. propriétés thermodynamiques et spectroscopiques Type de document : texte imprimé Auteurs : Salah Chafaa ; Univ.Louis Pasteur, Editeur scientifique ; Marie-José Schwing, Directeur de thèse Année de publication : 1993 Importance : 155 p. Note générale : 1 disponible à la salle de recherche Langues : Français (fre) Tags : Acide phosphorique Phénols Liaisons hydrogène intramoléculaires Potentiomètre Spectrophotométrie d' absorption. Index. décimale : 661 Chimie Industrielle Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=4559 Nouvelle génération de Chélatants acides phénols méthyle phosphoriques. propriétés thermodynamiques et spectroscopiques [texte imprimé] / Salah Chafaa ; Univ.Louis Pasteur, Editeur scientifique ; Marie-José Schwing, Directeur de thèse . - 1993 . - 155 p.
1 disponible à la salle de recherche
Langues : Français (fre)
Tags : Acide phosphorique Phénols Liaisons hydrogène intramoléculaires Potentiomètre Spectrophotométrie d' absorption. Index. décimale : 661 Chimie Industrielle Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=4559 Exemplaires
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Titre : دراسة فيتوكيميائية لنباتات Euphorbia clementei Boiss. (Euphorbiaceae) Eryngium tricuspidatum L. (Apiaceae) Cladanthus mixtus (L.) Oberpr. & Vogt (Asteraceae) Type de document : texte imprimé Auteurs : عباس بن مرعاش, Auteur ; أحمد كعبوش, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 342 ورقة. Format : 30 سم. Note générale : 2نسخ موجودة مكتبة المركزية
Langues : Arabe (ara) Tags : Euphorbia clementei Eryngium tricuspidatum Cladanthus mixtus terpenes flavonoids phenols quinic acid Cladanthus mixtus Terpènes acides phenolques acides quiniques ??????? ?????????? ????? ??????? ????? ????????? ?????? ??? ??????? Index. décimale : 540 الكيمياء و العلوم ذات العلاقة Résumé : From the photochemical study of 3 Algerian plants Euphorbia clementei (Euphorbiaceae), Eryngium tricuspidatum (Apiaceae), Cladanthus mixtus (Asteraceae), 42 compounds from which 3 are new, have been isolated and identified by the use of chromatographic techniques of separation and purification (CC, TLC, HPLC and EPC) and by spectral techniques e.g UV, NMR 1D and 2D, MS HRESI. The latex and CHCL3 extracts of E. clementei led to the isolation of 7 compounds, one new diterpenoid, 2 monoterpenes and 4 triterpenes. 8 Compounds (3 phenols glycosyls from which two are new, 2 monoterpenes, 1 coumarin and 2 flavonoids) have been isolated from the methanol extract of E. tricuspidatum.
The phytochemical investigation of ethyl the acetate and n_butanol extracts of C. mixtus allowed the isolation and identification of 27 compounds from which 15 flavonoids, 5 phenolic acids, 5 quinic acids, 1 phenol glycoside and 1 monoterpene glycoside.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/ABEN4203.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10671 دراسة فيتوكيميائية لنباتات Euphorbia clementei Boiss. (Euphorbiaceae) Eryngium tricuspidatum L. (Apiaceae) Cladanthus mixtus (L.) Oberpr. & Vogt (Asteraceae) [texte imprimé] / عباس بن مرعاش, Auteur ; أحمد كعبوش, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 342 ورقة. ; 30 سم.
2نسخ موجودة مكتبة المركزية
Langues : Arabe (ara)
Tags : Euphorbia clementei Eryngium tricuspidatum Cladanthus mixtus terpenes flavonoids phenols quinic acid Cladanthus mixtus Terpènes acides phenolques acides quiniques ??????? ?????????? ????? ??????? ????? ????????? ?????? ??? ??????? Index. décimale : 540 الكيمياء و العلوم ذات العلاقة Résumé : From the photochemical study of 3 Algerian plants Euphorbia clementei (Euphorbiaceae), Eryngium tricuspidatum (Apiaceae), Cladanthus mixtus (Asteraceae), 42 compounds from which 3 are new, have been isolated and identified by the use of chromatographic techniques of separation and purification (CC, TLC, HPLC and EPC) and by spectral techniques e.g UV, NMR 1D and 2D, MS HRESI. The latex and CHCL3 extracts of E. clementei led to the isolation of 7 compounds, one new diterpenoid, 2 monoterpenes and 4 triterpenes. 8 Compounds (3 phenols glycosyls from which two are new, 2 monoterpenes, 1 coumarin and 2 flavonoids) have been isolated from the methanol extract of E. tricuspidatum.
The phytochemical investigation of ethyl the acetate and n_butanol extracts of C. mixtus allowed the isolation and identification of 27 compounds from which 15 flavonoids, 5 phenolic acids, 5 quinic acids, 1 phenol glycoside and 1 monoterpene glycoside.Diplôme : Doctorat en sciences En ligne : ../theses/chimie/ABEN4203.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10671 Exemplaires
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Titre : Caractérisation de l’arganier (Argania spinosa L.) en Algérie et impact de la salinité Type de document : texte imprimé Auteurs : Mohamed Seif Allah Kechebar, Auteur ; Chaabane Rahmoune, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2016 Importance : 209 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Argania spinosa Tindouf cartographie structure huile d’argan phénols mapping argan oil phenols ???? ???????:????? ??? ??????? ???? ????? Index. décimale : 570 Sciences de la vie. Biologie Résumé : Through this work, we mapped the range of the argan tree in Algeria, studied stand structure, characterized argan oil and assess the impact of soil salinity on secondary metabolites (phenolic compounds). The main results showed that the argan tree covers an area of 96940 ha spread over two main perimeters where the altitude ranging from 315 to 630 m.
Stands are widely dispersed with an average height of 3 to 6 m and a surface crown between
24 and 68m2. Argan oil is a fine virgin oil, rich in linoleic acid (35%) and β-sitosterol (64%), characterized by low chlorophyll content (1.3 mg Pheophytin / kg oil) and low specific
extinction coefficient (K232 = 1.15). Results also showed that the argan tree can support very
salty soils (4.35 to 8.5 millimhos / cm) with an important accumulation of phenolic compounds (77.28 mg GAE g-1MS) as an adaptive response to salt stress. Qualitative analysis by LC-ESI-MS of phenolic compounds found that certain molecules appear under the effect of salt and other disappears when salinity becomes extreme. The study of antioxidant activities confirmed all these results and we have noted the best activities for the plant extracts from very salty soil. The present work has provided scientific information about the argan which inciting to preserve, develop and promote it in a vision of sustainable development.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/KEC6896.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10225 Caractérisation de l’arganier (Argania spinosa L.) en Algérie et impact de la salinité [texte imprimé] / Mohamed Seif Allah Kechebar, Auteur ; Chaabane Rahmoune, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2016 . - 209 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Argania spinosa Tindouf cartographie structure huile d’argan phénols mapping argan oil phenols ???? ???????:????? ??? ??????? ???? ????? Index. décimale : 570 Sciences de la vie. Biologie Résumé : Through this work, we mapped the range of the argan tree in Algeria, studied stand structure, characterized argan oil and assess the impact of soil salinity on secondary metabolites (phenolic compounds). The main results showed that the argan tree covers an area of 96940 ha spread over two main perimeters where the altitude ranging from 315 to 630 m.
Stands are widely dispersed with an average height of 3 to 6 m and a surface crown between
24 and 68m2. Argan oil is a fine virgin oil, rich in linoleic acid (35%) and β-sitosterol (64%), characterized by low chlorophyll content (1.3 mg Pheophytin / kg oil) and low specific
extinction coefficient (K232 = 1.15). Results also showed that the argan tree can support very
salty soils (4.35 to 8.5 millimhos / cm) with an important accumulation of phenolic compounds (77.28 mg GAE g-1MS) as an adaptive response to salt stress. Qualitative analysis by LC-ESI-MS of phenolic compounds found that certain molecules appear under the effect of salt and other disappears when salinity becomes extreme. The study of antioxidant activities confirmed all these results and we have noted the best activities for the plant extracts from very salty soil. The present work has provided scientific information about the argan which inciting to preserve, develop and promote it in a vision of sustainable development.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/KEC6896.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10225 Exemplaires
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Titre : Etude écophysiologique, développement et importance des plantes médicinales du genre Mentha dans le Parc National d’El-Kala (Nord-Est Algérie). Type de document : texte imprimé Auteurs : Amina Benabdallah, Auteur ; Chaabane Rahmoune, Directeur de thèse Importance : 152 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : M. aquatica M. arvensis Mx piperita M.pulegium M. rotundifolia M. x villosa NPEK ElKala RAMSAR phenols flavonoids tannins essential oil antioxidant acetylcholinesterase PNEK phénols, flavonoïdes, huile essentielle antioxydant acétylcholinestérase Index. décimale : 570 Sciences de la vie. Biologie Résumé : Mentha species are widely used by native habitants of El-Tarf region, as condiment, flavor or
herb in culinary preparations but also used for therapeutic properties as carminative, sedative,
antispasmodic and well known to treat stomach pain.
The aim of this work was first to inventory and geolocalisate Mentha species of the National
Park of El-Kala and then to investigate the total phenolics, flavonoids and tannins content and
the in-vitro antioxidant activities of methanolic extracts and essential oils, then to evaluate the
chemical composition of essential oils obtained from aerial parts of six wildMentha species:
M. aquatica, M. arvensis, M x piperita, M. pulegium, M. rotundifolia and M x villosa.
Chemical composition was analyzed by GC-MS method and biological activities investigated
by DPPH, B-carotene bleaching and ion chelating assays for the antioxidant activity, as well
as the inhibition of acetycholinesterase. The methanol extracts of mints were rich in phenolic
compounds and exhibited a powerful antioxidant activity ranged from7.5µg/mlto44.66
µg/ml,which varied significantly among species. M. aquatica stands out with an efficient
antioxidant ability which is correlated to the high total phenolics contents, followed by M.
arvensis and M. piperita with very close values, comparing to M. pulegium, M. rotundifolia
and M. villosa with lowest values. Qualitative and quantitative variations were observed
among species. The highest yield of oils, obtained by hydrodistillation, was recorded for M.
pulegium with 1.8%. A total of 27 compounds were identified with the predominance of
oxygenated monoterpenes such as menthofurane (73.38%), rotundifolone (65.99%), pulegone
(59.12%), menthol (49.89%), menthone (20.84%), neomenthol (20.76%), 1.8-cineol (18.16%)
and β-caryophyllene (12.55%). In general, M. aquatica exhibited the strongest antioxidant
level with IC50 of 0.69±0.06 mg/ml assessed by DPPH assay, 0.16±0.02 mg/ml by β-Carotene
bleaching and 1.73±0.17 mg/ml by ferrous ion chelating method. Whereas M. arvensisstood
out with IC50 of 27.5mg/ml for acetylcholinesterase inhibitory.These results show that Mentha
species from NPEK have a great potential of polyphenols which can be used as a natural food
preservative and antioxidant source. Moreover, mints could be exploited for their
pharmacological application in order to prevent induced diseases relied to oxidative stress.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/BEN7087.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10514 Etude écophysiologique, développement et importance des plantes médicinales du genre Mentha dans le Parc National d’El-Kala (Nord-Est Algérie). [texte imprimé] / Amina Benabdallah, Auteur ; Chaabane Rahmoune, Directeur de thèse . - [s.d.] . - 152 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : M. aquatica M. arvensis Mx piperita M.pulegium M. rotundifolia M. x villosa NPEK ElKala RAMSAR phenols flavonoids tannins essential oil antioxidant acetylcholinesterase PNEK phénols, flavonoïdes, huile essentielle antioxydant acétylcholinestérase Index. décimale : 570 Sciences de la vie. Biologie Résumé : Mentha species are widely used by native habitants of El-Tarf region, as condiment, flavor or
herb in culinary preparations but also used for therapeutic properties as carminative, sedative,
antispasmodic and well known to treat stomach pain.
The aim of this work was first to inventory and geolocalisate Mentha species of the National
Park of El-Kala and then to investigate the total phenolics, flavonoids and tannins content and
the in-vitro antioxidant activities of methanolic extracts and essential oils, then to evaluate the
chemical composition of essential oils obtained from aerial parts of six wildMentha species:
M. aquatica, M. arvensis, M x piperita, M. pulegium, M. rotundifolia and M x villosa.
Chemical composition was analyzed by GC-MS method and biological activities investigated
by DPPH, B-carotene bleaching and ion chelating assays for the antioxidant activity, as well
as the inhibition of acetycholinesterase. The methanol extracts of mints were rich in phenolic
compounds and exhibited a powerful antioxidant activity ranged from7.5µg/mlto44.66
µg/ml,which varied significantly among species. M. aquatica stands out with an efficient
antioxidant ability which is correlated to the high total phenolics contents, followed by M.
arvensis and M. piperita with very close values, comparing to M. pulegium, M. rotundifolia
and M. villosa with lowest values. Qualitative and quantitative variations were observed
among species. The highest yield of oils, obtained by hydrodistillation, was recorded for M.
pulegium with 1.8%. A total of 27 compounds were identified with the predominance of
oxygenated monoterpenes such as menthofurane (73.38%), rotundifolone (65.99%), pulegone
(59.12%), menthol (49.89%), menthone (20.84%), neomenthol (20.76%), 1.8-cineol (18.16%)
and β-caryophyllene (12.55%). In general, M. aquatica exhibited the strongest antioxidant
level with IC50 of 0.69±0.06 mg/ml assessed by DPPH assay, 0.16±0.02 mg/ml by β-Carotene
bleaching and 1.73±0.17 mg/ml by ferrous ion chelating method. Whereas M. arvensisstood
out with IC50 of 27.5mg/ml for acetylcholinesterase inhibitory.These results show that Mentha
species from NPEK have a great potential of polyphenols which can be used as a natural food
preservative and antioxidant source. Moreover, mints could be exploited for their
pharmacological application in order to prevent induced diseases relied to oxidative stress.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/BEN7087.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10514 Exemplaires
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Titre : تقييم الأثر الوقائي و/أو التعديلي للمنتجات الطبيعية النشطة بيولوجيا اثر الإصابة النفرونية المحرضة بالزئبق in vivo و in vitro Type de document : texte imprimé Auteurs : نادية دكدوك, Auteur ; سعاد أمداح, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2016 Importance : 88 ورقة. Format : 30 سم. Note générale : 2نسخ موجودة مكتبة المركزية
Langues : Arabe (ara) Tags : ??????? ????????? ?????? ?????? olea europaea ???????? ??????? ???????? ????? ??????? ????????? luteolin??????? hydroxytyrosol oleuropein ?????? ?????? ??????? ?????? ?????? ????????
Nephropathy Mercury chloride Olea europaea Olive extracts Olive leaves extracts Phenols Glucosylated luteolin Hydroxytyrosol Oleuropein Antioxydante activity Antiinflammatory action Nephropathie Chlorure du mercure Olea europaea L Extraits des olives Extraits
des f Phénols Lutéoline glycosylée Activité antioxydante Activité anti-inflammatoireIndex. décimale : 570 بيولوجيا Résumé :
This study investigate the protector effect of Olea europaea.L against nephropathy induced by chloride mercury in mouse male Albinos wistar. Phenolic composition and biological activities of olives and leaves extracts from Italian and Algerian Olea europaea L. cultivars were studied.Total phenolic and tannin contents were quantified in the extracts. Moreover 14 different phenolic compounds were identified , and their profiles showed remarkable
quantitative differences among analysed olive extracts (OE). Glucosylated luteolin ,hydroxytyrosol and oleuropein are identified in the Chemlal olive leaves (CLE). Results showed that (OE)of Chemlal, between Algerian cultivars, and (OE) of Coratina, among Italian ones , and hydroxytyrosol, among identified phenolic compounds, were found to be the best inhibitors of the DPPH , and Carotene bleaching and a good iron reducers. Although (CLE) markedly provided an antioxidant and anti-inflammatory actions. In vivo ,the study was designed to investigate the possible protective effect of (CLE) in mercuric chloride (HgCl2) induced renal oxidative stress. Adult male albino Wistar mice were exposed to (HgCl2; 5 mg/kg bwt;ip) and (CLE; 200 mg/kg bwt) for 10 days compared with sodium selinate (0.1 mg/kg) as standard reference. Treatment with HgCl2 induced renal dysfunction by increasing urea , creatinin . Lipid peroxidation was elevated and along with a concomitant decrease in glutathione and various antioxidant enzymes, namely superoxide dismutase,
catalase, glutathione peroxidase and glutathione reductase. HgCl2 intoxication increased nitric oxide production and myeloperoxidase and decreased LDH activities . Pretreatment with (CLE) exhibited a good protection as evidenced by the correction of renal functional, amelioration of the antioxidant system . The inflammatory reactions were modulated.
Histopathological examination of the kidney tissues proved the protective effect of (CLE) against HgCl2. The obtained results clearly show that, the response of(CLE)and sodium selinate are comparable in most parameters. These findings showed that , the olive leaf extract possessed an antioxidant and an anti-inflammtory actions that could be attributed to the bioactive principles (glucosylated luteolin, hydroxytyrosol, oleuropein) synergistically acted .Results suggest that Olea europaea leaves and olives extracts can represent an
important natural source with high antioxidant and anti-inflammatory potential and would seem to be applicable in both the health and medical food.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/ADEK4133.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10301 تقييم الأثر الوقائي و/أو التعديلي للمنتجات الطبيعية النشطة بيولوجيا اثر الإصابة النفرونية المحرضة بالزئبق in vivo و in vitro [texte imprimé] / نادية دكدوك, Auteur ; سعاد أمداح, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2016 . - 88 ورقة. ; 30 سم.
2نسخ موجودة مكتبة المركزية
Langues : Arabe (ara)
Tags : ??????? ????????? ?????? ?????? olea europaea ???????? ??????? ???????? ????? ??????? ????????? luteolin??????? hydroxytyrosol oleuropein ?????? ?????? ??????? ?????? ?????? ????????
Nephropathy Mercury chloride Olea europaea Olive extracts Olive leaves extracts Phenols Glucosylated luteolin Hydroxytyrosol Oleuropein Antioxydante activity Antiinflammatory action Nephropathie Chlorure du mercure Olea europaea L Extraits des olives Extraits
des f Phénols Lutéoline glycosylée Activité antioxydante Activité anti-inflammatoireIndex. décimale : 570 بيولوجيا Résumé :
This study investigate the protector effect of Olea europaea.L against nephropathy induced by chloride mercury in mouse male Albinos wistar. Phenolic composition and biological activities of olives and leaves extracts from Italian and Algerian Olea europaea L. cultivars were studied.Total phenolic and tannin contents were quantified in the extracts. Moreover 14 different phenolic compounds were identified , and their profiles showed remarkable
quantitative differences among analysed olive extracts (OE). Glucosylated luteolin ,hydroxytyrosol and oleuropein are identified in the Chemlal olive leaves (CLE). Results showed that (OE)of Chemlal, between Algerian cultivars, and (OE) of Coratina, among Italian ones , and hydroxytyrosol, among identified phenolic compounds, were found to be the best inhibitors of the DPPH , and Carotene bleaching and a good iron reducers. Although (CLE) markedly provided an antioxidant and anti-inflammatory actions. In vivo ,the study was designed to investigate the possible protective effect of (CLE) in mercuric chloride (HgCl2) induced renal oxidative stress. Adult male albino Wistar mice were exposed to (HgCl2; 5 mg/kg bwt;ip) and (CLE; 200 mg/kg bwt) for 10 days compared with sodium selinate (0.1 mg/kg) as standard reference. Treatment with HgCl2 induced renal dysfunction by increasing urea , creatinin . Lipid peroxidation was elevated and along with a concomitant decrease in glutathione and various antioxidant enzymes, namely superoxide dismutase,
catalase, glutathione peroxidase and glutathione reductase. HgCl2 intoxication increased nitric oxide production and myeloperoxidase and decreased LDH activities . Pretreatment with (CLE) exhibited a good protection as evidenced by the correction of renal functional, amelioration of the antioxidant system . The inflammatory reactions were modulated.
Histopathological examination of the kidney tissues proved the protective effect of (CLE) against HgCl2. The obtained results clearly show that, the response of(CLE)and sodium selinate are comparable in most parameters. These findings showed that , the olive leaf extract possessed an antioxidant and an anti-inflammtory actions that could be attributed to the bioactive principles (glucosylated luteolin, hydroxytyrosol, oleuropein) synergistically acted .Results suggest that Olea europaea leaves and olives extracts can represent an
important natural source with high antioxidant and anti-inflammatory potential and would seem to be applicable in both the health and medical food.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/ADEK4133.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10301 Exemplaires
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