2 résultat(s) recherche sur le tag 'Productivity'    

Etude et modélisation de deux distillateurs solaires symétrique et asymétrique à effet de serre / Abderachid Trad  

Public ISBD Titre : Etude et modélisation de deux distillateurs solaires symétrique et asymétrique à effet de serre Type de document : texte imprimé Auteurs : Abderachid Trad, Auteur ; Abdenacer Kaabi, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 242 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Tags : Distillateur solaire  orientation  comparaison  Productivité  Solar still  Orientation  Comparison  Productivity  ???? ???????  ???????  ????????  ????????? Index. décimale : 626 Génie Climatique Résumé : A computer program has been developed to simulate the effect of the orientations (east– west and south–north), on the performance of a symmetric double slope solar still compared to those of an asymmetric solar still with a double effect, in order to obtain the optimum design parameters for both types, under climatic conditions of Constantine (Eastern area of Algeria), using meteorological data of 1st August of 2005 as the hottest day selected from the last decade (2002–2012). The obtained results show that10° is the optimum inclination angle that allows receiving a maximum solar radiation for both stills by increasing the evaporation condensation processes. A water depth of 0.02 m gives higher daily production. The stability of solar radiation seen in a south–north orientation leads to high reception of solar radiation by both stills.The coefficient of heat transfer by evaporation has contributed in major in the production of solar stills (70%), followed by the coefficient of heat transfer by radiation (23%), and the left is for the heat transfer by convection (7%). The practical limit of optimal insulation thickness that gives the maximum efficiency of the two systems of distillation is about 0.10 m. As a consequence, the daily productivity of an asymmetric still, with a double effect process is found higher than that corresponding to the symmetric one with a double slope system, and where at the south–north orientation we notice an increase of 22.57% and at the east–west orientation it is of 16.23%. It is shown also that a south–north orientation enhances the performance of the asymmetric still with a double effect by 16.76%. Diplôme : Doctorat en sciences En ligne : ../theses/gclim/TRA6716.pdf Format de la ressource électronique : pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9907 Etude et modélisation de deux distillateurs solaires symétrique et asymétrique à effet de serre [texte imprimé] / Abderachid Trad, Auteur ; Abdenacer Kaabi, Directeur de thèse . - constantine (Route ain el bey, Algérie) : Université Constantine 1, 2014 . - 242 f. ; 30 cm. 2 copies imprimées disponibles Langues : Français (fre) Tags : Distillateur solaire  orientation  comparaison  Productivité  Solar still  Orientation  Comparison  Productivity  ???? ???????  ???????  ????????  ????????? Index. décimale : 626 Génie Climatique Résumé : A computer program has been developed to simulate the effect of the orientations (east– west and south–north), on the performance of a symmetric double slope solar still compared to those of an asymmetric solar still with a double effect, in order to obtain the optimum design parameters for both types, under climatic conditions of Constantine (Eastern area of Algeria), using meteorological data of 1st August of 2005 as the hottest day selected from the last decade (2002–2012). The obtained results show that10° is the optimum inclination angle that allows receiving a maximum solar radiation for both stills by increasing the evaporation condensation processes. A water depth of 0.02 m gives higher daily production. The stability of solar radiation seen in a south–north orientation leads to high reception of solar radiation by both stills.The coefficient of heat transfer by evaporation has contributed in major in the production of solar stills (70%), followed by the coefficient of heat transfer by radiation (23%), and the left is for the heat transfer by convection (7%). The practical limit of optimal insulation thickness that gives the maximum efficiency of the two systems of distillation is about 0.10 m. As a consequence, the daily productivity of an asymmetric still, with a double effect process is found higher than that corresponding to the symmetric one with a double slope system, and where at the south–north orientation we notice an increase of 22.57% and at the east–west orientation it is of 16.23%. It is shown also that a south–north orientation enhances the performance of the asymmetric still with a double effect by 16.76%. Diplôme : Doctorat en sciences En ligne : ../theses/gclim/TRA6716.pdf Format de la ressource électronique : pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9907

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دراسة تأثير الاسمد العضوية الطبيعية المختلفة ومستوى النتروجين في نمو و انتاجيةالبطاطا صنف سبونتا)Solanum tuberosum L.)في منطقة وادي سوف / الجيلاني غمام عمارة  

Public ISBD Titre : دراسة تأثير الاسمد العضوية الطبيعية المختلفة ومستوى النتروجين في نمو و انتاجيةالبطاطا صنف سبونتا)Solanum tuberosum L.)في منطقة وادي سوف Type de document : texte imprimé Auteurs : الجيلاني غمام عمارة, Auteur ; محمد مراد السنوسي, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2016 Importance : 215 ورقة. Format : 30 سم. Note générale : 2 copies imprimes disponibles Langues : Arabe (ara) Tags : Potato  organic fertilizer  vegetative nitrogen  growth  productivity  protein  antioxidants  ???????  ??????? ???????  ?????????  ????? ??????  ????????  ?????? ??????? Index. décimale : 570 بيولوجيا Résumé : The experiments of this study were conducted at the region of Hassi khalifa, El-Oued, during the agricultural seasons 2010, 2011 and 2013. The objectives of this study were to investigate the effects of three kinds of organic manure (chicken, sheep and mixed manure chicken and sheep1/1 w/w) with three levels nitrogen for each one (1, 2, 3 kg/h protifert manure ) on the growth and yields of potato. These were compared with control and common fertilization treatment applied by the potato farmers (chicken manure + chemical manure N P k). A Factorial Randomized Complete Block Design (F-RCBD) was selected for the three experiments. Each experiment contained 11 treatments for each treatment with three replicates. The test of Least significant differences (LSD) was used to compare mean with 0.05 levels. In general results of the three experiments could be summarized as follow: - Physiological qualities were no significantly increased in terms of (Ratio and speed emergence, photosynthetic efficiency, relative water content and chlorophyll percentage). As a results of organic manure utilization and addition of three levels nitrogen as compared to untreated control during growing seasons. The results showed the greatest increase at the treatment of chicken manure either alone or mixed with sheep manure with these levels nitrogen in physiological qualities. - The results of vegetative growth reveled the following: Growth was significantly increased in terms of (foliage area, leaf area index, stem numbers/plant and plant height). Treatments chicken manure, chicken manure + 1kg/h protifert and mixed manure + 3kg/h of protifert appeared to be the most effective treatments in improving vegetative growth traits. - The results revealed that using the animal waste with levels nitrogen spraying on the leaves showed a significantly increase in treats of yield quantity terms (tuber number, tuber weight, yield of individual plant, total yield and marketable yield). Add to that treatments first level in chicken manure either alone or mixed better in tuber number, marketable yield. As for as the common fertilization treatment applied by the potato farmers and chicken manure +2 kg/h of protifert increased significantly tuber weight. - The results showed improvement in the chemical properties of the tuber using organic manure subsidized levels of nitrogen, the treatment chicken manure+ 1kg/h protifert lead to dry matter percentage, organic matter and starch percentage of tuber. Their treatments chicken manure + 2 kg/h of protifert better in protein, carbohydrate and nitrogen percentage of tuber. The results showed a significantly increase with treatments chicken manure alone or mixed + 2 kg/h of protifert in phosphor percentage of tuber. The treatment chicken manure +3 kg/h of protifert better in potassium content of the tuber. No significantly increase of treatment manure in anthocyanin and carotenoid content in tuber. - The results also showed a positive relationship between the phenols and flavonoids content, carbohydrates, potassium and phosphor in the tuber with nitrogen levels. In addition, it was observed an inverse relationship between the dry matter, starch and protein percentage. Diplôme : Doctorat en sciences En ligne : ../theses/biologie/AGHE4106.pdf Format de la ressource électronique : pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10152 دراسة تأثير الاسمد العضوية الطبيعية المختلفة ومستوى النتروجين في نمو و انتاجيةالبطاطا صنف سبونتا)Solanum tuberosum L.)في منطقة وادي سوف [texte imprimé] / الجيلاني غمام عمارة, Auteur ; محمد مراد السنوسي, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2016 . - 215 ورقة. ; 30 سم. 2 copies imprimes disponibles Langues : Arabe (ara) Tags : Potato  organic fertilizer  vegetative nitrogen  growth  productivity  protein  antioxidants  ???????  ??????? ???????  ?????????  ????? ??????  ????????  ?????? ??????? Index. décimale : 570 بيولوجيا Résumé : The experiments of this study were conducted at the region of Hassi khalifa, El-Oued, during the agricultural seasons 2010, 2011 and 2013. The objectives of this study were to investigate the effects of three kinds of organic manure (chicken, sheep and mixed manure chicken and sheep1/1 w/w) with three levels nitrogen for each one (1, 2, 3 kg/h protifert manure ) on the growth and yields of potato. These were compared with control and common fertilization treatment applied by the potato farmers (chicken manure + chemical manure N P k). A Factorial Randomized Complete Block Design (F-RCBD) was selected for the three experiments. Each experiment contained 11 treatments for each treatment with three replicates. The test of Least significant differences (LSD) was used to compare mean with 0.05 levels. In general results of the three experiments could be summarized as follow: - Physiological qualities were no significantly increased in terms of (Ratio and speed emergence, photosynthetic efficiency, relative water content and chlorophyll percentage). As a results of organic manure utilization and addition of three levels nitrogen as compared to untreated control during growing seasons. The results showed the greatest increase at the treatment of chicken manure either alone or mixed with sheep manure with these levels nitrogen in physiological qualities. - The results of vegetative growth reveled the following: Growth was significantly increased in terms of (foliage area, leaf area index, stem numbers/plant and plant height). Treatments chicken manure, chicken manure + 1kg/h protifert and mixed manure + 3kg/h of protifert appeared to be the most effective treatments in improving vegetative growth traits. - The results revealed that using the animal waste with levels nitrogen spraying on the leaves showed a significantly increase in treats of yield quantity terms (tuber number, tuber weight, yield of individual plant, total yield and marketable yield). Add to that treatments first level in chicken manure either alone or mixed better in tuber number, marketable yield. As for as the common fertilization treatment applied by the potato farmers and chicken manure +2 kg/h of protifert increased significantly tuber weight. - The results showed improvement in the chemical properties of the tuber using organic manure subsidized levels of nitrogen, the treatment chicken manure+ 1kg/h protifert lead to dry matter percentage, organic matter and starch percentage of tuber. Their treatments chicken manure + 2 kg/h of protifert better in protein, carbohydrate and nitrogen percentage of tuber. The results showed a significantly increase with treatments chicken manure alone or mixed + 2 kg/h of protifert in phosphor percentage of tuber. The treatment chicken manure +3 kg/h of protifert better in potassium content of the tuber. No significantly increase of treatment manure in anthocyanin and carotenoid content in tuber. - The results also showed a positive relationship between the phenols and flavonoids content, carbohydrates, potassium and phosphor in the tuber with nitrogen levels. In addition, it was observed an inverse relationship between the dry matter, starch and protein percentage. Diplôme : Doctorat en sciences En ligne : ../theses/biologie/AGHE4106.pdf Format de la ressource électronique : pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10152

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