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Partager le résultat de cette recherche Interroger des sources externesEnquête sur la consommation des polyphénols auprès d’un échantillon de 200 personnes de la région de Constantine / Fatima Zohra Becila
Titre : Enquête sur la consommation des polyphénols auprès d’un échantillon de 200 personnes de la région de Constantine Type de document : texte imprimé Auteurs : Fatima Zohra Becila, Auteur ; Malika Barkat, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 104 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Tags : Free radicals oxidative stress antioxidants polyphenols health nutrition radicaux libres apport journalier polyphénols santé alimentation ?????? ????? ??????? ?????? ??????? ????? ????????? ????? Index. décimale : 640 Industrie Alimentaire Résumé : The organism produces free radicals daily. They may result from the action of certain chemical components of our environment (X-rays and UV light) of air pollutants (N, NO2), drugs, smoke, tobacco, alcohol, dietary errors.
Oxidative stress due to free radicals causes tissue damage mainly by oxidation of proteins, DNA or lipids; it is involved in many diseases such as trigger or associated with the development of complications. Antioxidants are compound chemicals that reduce cells’ oxidation. Some are endogenous, while others are obtained from the diet (exogenous). Among them, polyphenols represent a very large proportion of micronutrients provided by our diet. They are becoming increasingly important, particularly caused of their effects of natural antioxidants.
The purpose of the survey is to collect as much information on the consumption of certain foods that contain polyphenols end to know the daily consumption of a sample of 200 subjects taken at random in the Constantine. The questionnaire developed has two main components: a first component summarizes information on the identification of the interviewee, his health, risk factors and sedentary behavior. The second part contains information on foods consumed containing polyphenolic compounds, drawn from the database of the site phenol -explorer (http:// www. Phenol-explorer.eu/contents/total? Food- id = aa1). He also discussed in addition to the quantitative aspect and some processing that may affect the polyphenol composition of foods. From the results obtained, we run down the following key points:
For daily consumption, 76% of subjects surveyed consume vegetables, 48% consume fruits, 39% and 20% drink drinks and herbal teas.
Consumption of vegetables, fruits and beverages depends on the price, while the taste is not the primary factor in daily consumption of herbal teas.
The sick patients consume fewer fresh fruits and vegetables and envelopes, more preserved foods, have more risk factors compared to healthy subjects.
Regarding the consumption of polyphenols majority of respondents (75%) consumption complies with the standard (1g per day) which 2,75% corresponds to sick patients and 92,55% with healthy subjects. Among subjects with the standard lower consumption (25%), 97,43% corresponds to sick patients and 7,45% corresponds to healthy subjects. A weak correlation is found between the consumption of polyphenols and health, A weak correlation is found between the consumption of polyphenols and health.Diplôme : Magistère En ligne : ../theses/agronomie/BEC6482.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9543 Enquête sur la consommation des polyphénols auprès d’un échantillon de 200 personnes de la région de Constantine [texte imprimé] / Fatima Zohra Becila, Auteur ; Malika Barkat, Directeur de thèse . - constantine (Route ain el bey, Algérie) : Université Constantine 1, 2014 . - 104 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Free radicals oxidative stress antioxidants polyphenols health nutrition radicaux libres apport journalier polyphénols santé alimentation ?????? ????? ??????? ?????? ??????? ????? ????????? ????? Index. décimale : 640 Industrie Alimentaire Résumé : The organism produces free radicals daily. They may result from the action of certain chemical components of our environment (X-rays and UV light) of air pollutants (N, NO2), drugs, smoke, tobacco, alcohol, dietary errors.
Oxidative stress due to free radicals causes tissue damage mainly by oxidation of proteins, DNA or lipids; it is involved in many diseases such as trigger or associated with the development of complications. Antioxidants are compound chemicals that reduce cells’ oxidation. Some are endogenous, while others are obtained from the diet (exogenous). Among them, polyphenols represent a very large proportion of micronutrients provided by our diet. They are becoming increasingly important, particularly caused of their effects of natural antioxidants.
The purpose of the survey is to collect as much information on the consumption of certain foods that contain polyphenols end to know the daily consumption of a sample of 200 subjects taken at random in the Constantine. The questionnaire developed has two main components: a first component summarizes information on the identification of the interviewee, his health, risk factors and sedentary behavior. The second part contains information on foods consumed containing polyphenolic compounds, drawn from the database of the site phenol -explorer (http:// www. Phenol-explorer.eu/contents/total? Food- id = aa1). He also discussed in addition to the quantitative aspect and some processing that may affect the polyphenol composition of foods. From the results obtained, we run down the following key points:
For daily consumption, 76% of subjects surveyed consume vegetables, 48% consume fruits, 39% and 20% drink drinks and herbal teas.
Consumption of vegetables, fruits and beverages depends on the price, while the taste is not the primary factor in daily consumption of herbal teas.
The sick patients consume fewer fresh fruits and vegetables and envelopes, more preserved foods, have more risk factors compared to healthy subjects.
Regarding the consumption of polyphenols majority of respondents (75%) consumption complies with the standard (1g per day) which 2,75% corresponds to sick patients and 92,55% with healthy subjects. Among subjects with the standard lower consumption (25%), 97,43% corresponds to sick patients and 7,45% corresponds to healthy subjects. A weak correlation is found between the consumption of polyphenols and health, A weak correlation is found between the consumption of polyphenols and health.Diplôme : Magistère En ligne : ../theses/agronomie/BEC6482.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9543 Exemplaires
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Titre : Etude des activités antioxydante et antibactérienne des polyphénols d’Allium triquetrum L. en vue de leur application sur la sardine commune Type de document : texte imprimé Auteurs : Hayat Himed èp Idir, Auteur ; Lila Boulekbache, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 95 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Allium triquetrum L. activité antioxydante activité antimicrobienne polyphénols Sardina pichardus antioxidant activity antimicrobial activity polyphenols ????? ?????? ??????? ????? ?????? ????????? ????????? ?????? ??????? ?????? Index. décimale : 640 Industrie Alimentaire Résumé :
phenolic compounds to study their antioxidant and antibacterial effects. The best phenolic
extract was tested to prevent sardine deterioration.
The extraction of polyphénols from leaves and bulbs was carried out by a conventional method (maceration) and the innovative one (microwave), using three solvent systems (acetone, ethanol, methanol) at 70%. We found that samples irradiated for three minutes gave the best yields.
For comparative purposes, total phenolics, flavonoïds and tannins are quantified from the different extracts. It found that leaves content is higher than that of bulbs. Extraction assisted by microwave, using acetone and ethanol, was best procedure of extraction of these bioactive compounds.
The antioxidant activity of selected extracts (FA, FA3, FE, FE3, BA, BE3) was evaluated by the means of three methods: FRAP method, DPPH essay and the β-carotene bleaching method. Results displayed that leaves extracts exercise notable antioxydant effect than the bulbs ones. The extract FA3 appears the best but less powerful than BHA which is used as standard.
A correlation between these extracts content’s of flavonoïds and antioxidant was highly significant (R2 > 0.95; p < 0.05) and even more significant than that obtained with total phenols and tannins.
Antibacterial potential of these extracts (FA, FA3, FE, FE3, BA, BE3) was tested by the Agar-well diffusion method against Bacillus subtilis ATCC6633, Staphylococcus aureus ATCC43300, Escherichia coli ATCC25922 and Pseudomonas aeruginosa ATCC27853. A moderate antibacterial activity of acetone extracts of leaves against Escherichia coli and Staphylococcus aureus was noted with a load of 1000 μg/disk.
The extract FA3 has been tested for its efficacy upon sardine with a concentration of 10, 25 and 50 mg/ml during 10 days of conservation at 6°C, using the TBARS method. The results showed that this extract reduce significantly the oxidation of sardine’s lipids.Diplôme : Magistère En ligne : ../theses/agronomie/HIM6626.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9750 Etude des activités antioxydante et antibactérienne des polyphénols d’Allium triquetrum L. en vue de leur application sur la sardine commune [texte imprimé] / Hayat Himed èp Idir, Auteur ; Lila Boulekbache, Directeur de thèse . - constantine (Route ain el bey, Algérie) : Université Constantine 1, 2014 . - 95 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Allium triquetrum L. activité antioxydante activité antimicrobienne polyphénols Sardina pichardus antioxidant activity antimicrobial activity polyphenols ????? ?????? ??????? ????? ?????? ????????? ????????? ?????? ??????? ?????? Index. décimale : 640 Industrie Alimentaire Résumé :
phenolic compounds to study their antioxidant and antibacterial effects. The best phenolic
extract was tested to prevent sardine deterioration.
The extraction of polyphénols from leaves and bulbs was carried out by a conventional method (maceration) and the innovative one (microwave), using three solvent systems (acetone, ethanol, methanol) at 70%. We found that samples irradiated for three minutes gave the best yields.
For comparative purposes, total phenolics, flavonoïds and tannins are quantified from the different extracts. It found that leaves content is higher than that of bulbs. Extraction assisted by microwave, using acetone and ethanol, was best procedure of extraction of these bioactive compounds.
The antioxidant activity of selected extracts (FA, FA3, FE, FE3, BA, BE3) was evaluated by the means of three methods: FRAP method, DPPH essay and the β-carotene bleaching method. Results displayed that leaves extracts exercise notable antioxydant effect than the bulbs ones. The extract FA3 appears the best but less powerful than BHA which is used as standard.
A correlation between these extracts content’s of flavonoïds and antioxidant was highly significant (R2 > 0.95; p < 0.05) and even more significant than that obtained with total phenols and tannins.
Antibacterial potential of these extracts (FA, FA3, FE, FE3, BA, BE3) was tested by the Agar-well diffusion method against Bacillus subtilis ATCC6633, Staphylococcus aureus ATCC43300, Escherichia coli ATCC25922 and Pseudomonas aeruginosa ATCC27853. A moderate antibacterial activity of acetone extracts of leaves against Escherichia coli and Staphylococcus aureus was noted with a load of 1000 μg/disk.
The extract FA3 has been tested for its efficacy upon sardine with a concentration of 10, 25 and 50 mg/ml during 10 days of conservation at 6°C, using the TBARS method. The results showed that this extract reduce significantly the oxidation of sardine’s lipids.Diplôme : Magistère En ligne : ../theses/agronomie/HIM6626.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9750 Exemplaires
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Titre : Effets biologiques de polyphénols extraits de plantes médicinales (Ranunculus repens L. et Thymus hirtus Willd) sur l'activité de micro-organismes responsables de certaines pathologies Type de document : texte imprimé Auteurs : Université Mentouri, Editeur scientifique Année de publication : 2001 Importance : 97 f. Note générale : 02 disponibles au magasin de la bibliothèque centrale
01 disponible à la salle de rechercheLangues : Français (fre) Tags : Extraction Flavonoides Polyphénols Chromatographie Activité antimicrobienne Index. décimale : 570 Sciences de la vie. Biologie Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1482 Effets biologiques de polyphénols extraits de plantes médicinales (Ranunculus repens L. et Thymus hirtus Willd) sur l'activité de micro-organismes responsables de certaines pathologies [texte imprimé] / Université Mentouri, Editeur scientifique . - 2001 . - 97 f.
02 disponibles au magasin de la bibliothèque centrale
01 disponible à la salle de recherche
Langues : Français (fre)
Tags : Extraction Flavonoides Polyphénols Chromatographie Activité antimicrobienne Index. décimale : 570 Sciences de la vie. Biologie Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1482 Exemplaires
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Titre : Etude biologique du chêne liège (Quercus suber L.) : caractérisation des polyphénols Type de document : texte imprimé Auteurs : Zoubida Boukheit née Benmekhlouf, Auteur ; Université Mentouri, Editeur scientifique ; R Merghem, Auteur Année de publication : 2002 Importance : 92 f. Note générale : 02 disponibles au magasin de la bibliothèque centrale
01 disponible à la salle de rechercheLangues : Français (fre) Tags : Quercus suber L Excision racinaires Polyphénols Croissance rythmique Index. décimale : 570 Sciences de la vie. Biologie Diplôme : Magistère Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1484 Etude biologique du chêne liège (Quercus suber L.) : caractérisation des polyphénols [texte imprimé] / Zoubida Boukheit née Benmekhlouf, Auteur ; Université Mentouri, Editeur scientifique ; R Merghem, Auteur . - 2002 . - 92 f.
02 disponibles au magasin de la bibliothèque centrale
01 disponible à la salle de recherche
Langues : Français (fre)
Tags : Quercus suber L Excision racinaires Polyphénols Croissance rythmique Index. décimale : 570 Sciences de la vie. Biologie Diplôme : Magistère Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1484 Exemplaires
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Titre : Etude des propriétés biochimiques des polyphénols et tannins issus de Rosmarinus officinalis et Vicia faba L. Type de document : texte imprimé Auteurs : Université Mentouri, Editeur scientifique Année de publication : 2006 Importance : 91 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Tags : Polyphénols Antibactériens Rosmarinus officinalis Vicia fabla L Etude phytochimique Antinutritionnels Antiradicalaires Index. décimale : 570 Sciences de la vie. Biologie En ligne : ../theses/biologie/AKR4668.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1796 Etude des propriétés biochimiques des polyphénols et tannins issus de Rosmarinus officinalis et Vicia faba L. [texte imprimé] / Université Mentouri, Editeur scientifique . - 2006 . - 91 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Tags : Polyphénols Antibactériens Rosmarinus officinalis Vicia fabla L Etude phytochimique Antinutritionnels Antiradicalaires Index. décimale : 570 Sciences de la vie. Biologie En ligne : ../theses/biologie/AKR4668.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=1796 Exemplaires
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