PSR

En Côte d’Ivoire, plus de la moitié du couvert forestier (57 %) a disparu en un quart de siècle (1990-2015) avec une perte importante de biodiversité. Pour mieux comprendre les dynamiques en cours et appuyer les politiques de réduction de la déforestation, des cartographies fines et régulières des changements d’occupation et d’usage des terres sont nécessaires. Cependant, ces études sont rarement conduites sur de grands territoires ou bien elles sont parfois obsolètes à cause de la rapidité des processus anthropiques sous-jacents. L’objectif de cette étude est d’évaluer les changements d’occup...

En Côte d’Ivoire, plus de la moitié du couvert forestier (57 %) a disparu en un quart de siècle (1990-2015) avec une perte importante de biodiversité. Pour mieux comprendre les dynamiques en cours et appuyer les politiques de réduction de la déforestation, des cartographies fines et régulières des changements d’occupation et d’usage des terres sont nécessaires. Cependant, ces études sont rarement conduites sur de grands territoires ou bien elles sont parfois obsolètes à cause de la rapidité des processus anthropiques sous-jacents. L’objectif de cette étude est d’évaluer les changements d’occup...

AbstractMost of the West African forests have disappeared or have been deeply fragmented. This deforestation dynamic is still ongoing under a strong demographic pressure, forests being mostly replaced by agricultural lands. On the other hand, some reforestation projects are also undertaken, in particular by planting non-native species like Cedrela odorata. To our knowledge, this study is the first to investigate the causes and consequences of Cedrela odorata spread in West African natural forests. We studied a 400ha area of natural forest where 100ha of permanent plots have been affected by a...

AbstractMost of the West African forests have disappeared or have been deeply fragmented. This deforestation dynamic is still ongoing under a strong demographic pressure, forests being mostly replaced by agricultural lands. On the other hand, some reforestation projects are also undertaken, in particular by planting non-native species like Cedrela odorata. To our knowledge, this study is the first to investigate the causes and consequences of Cedrela odorata spread in West African natural forests. We studied a 400ha area of natural forest where 100ha of permanent plots have been affected by a...

AbstractMost of the West African forests have disappeared or have been deeply fragmented. This deforestation dynamic is still ongoing under a strong demographic pressure, forests being mostly replaced by agricultural lands. On the other hand, some reforestation projects are also undertaken, in particular by planting non-native species like Cedrela odorata. To our knowledge, this study is the first to investigate the causes and consequences of Cedrela odorata spread in West African natural forests. We studied a 400ha area of natural forest where 100ha of permanent plots have been affected by a...

AbstractMost of the West African forests have disappeared or have been deeply fragmented. This deforestation dynamic is still ongoing under a strong demographic pressure, forests being mostly replaced by agricultural lands. On the other hand, some reforestation projects are also undertaken, in particular by planting non-native species like Cedrela odorata. To our knowledge, this study is the first to investigate the causes and consequences of Cedrela odorata spread in West African natural forests. We studied a 400ha area of natural forest where 100ha of permanent plots have been affected by a...

AbstractMost of the West African forests have disappeared or have been deeply fragmented. This deforestation dynamic is still ongoing under a strong demographic pressure, forests being mostly replaced by agricultural lands. On the other hand, some reforestation projects are also undertaken, in particular by planting non-native species like Cedrela odorata. To our knowledge, this study is the first to investigate the causes and consequences of Cedrela odorata spread in West African natural forests. We studied a 400ha area of natural forest where 100ha of permanent plots have been affected by a...

AbstractMost of the West African forests have disappeared or have been deeply fragmented. This deforestation dynamic is still ongoing under a strong demographic pressure, forests being mostly replaced by agricultural lands. On the other hand, some reforestation projects are also undertaken, in particular by planting non-native species like Cedrela odorata. To our knowledge, this study is the first to investigate the causes and consequences of Cedrela odorata spread in West African natural forests. We studied a 400ha area of natural forest where 100ha of permanent plots have been affected by a...

AbstractSubstantial areas of agricultural lands in Sub-Saharan Africa have been invaded by Chromolaena odorata (Asteraceae), but the consequences for arbuscular mycorrhiza fungi (AMF) remains poorly understood. This study explores changes in diverse AMF community attributes and soil available phosphorus following C. odorata invasion in forest and savanna fragments in Côte d’Ivoire (West Africa). Invaded-forest (COF) and savanna (COS) sites were compared to adjacent natural forest (FOR) and savanna (SAV) fragments, respectively. Physico-chemical variables and AMF spore density parameters were d...

AbstractSubstantial areas of agricultural lands in Sub-Saharan Africa have been invaded by Chromolaena odorata (Asteraceae), but the consequences for arbuscular mycorrhiza fungi (AMF) remains poorly understood. This study explores changes in diverse AMF community attributes and soil available phosphorus following C. odorata invasion in forest and savanna fragments in Côte d’Ivoire (West Africa). Invaded-forest (COF) and savanna (COS) sites were compared to adjacent natural forest (FOR) and savanna (SAV) fragments, respectively. Physico-chemical variables and AMF spore density parameters were d...

AbstractSubstantial areas of agricultural lands in Sub-Saharan Africa have been invaded by Chromolaena odorata (Asteraceae), but the consequences for arbuscular mycorrhiza fungi (AMF) remains poorly understood. This study explores changes in diverse AMF community attributes and soil available phosphorus following C. odorata invasion in forest and savanna fragments in Côte d’Ivoire (West Africa). Invaded-forest (COF) and savanna (COS) sites were compared to adjacent natural forest (FOR) and savanna (SAV) fragments, respectively. Physico-chemical variables and AMF spore density parameters were d...

AbstractSubstantial areas of agricultural lands in Sub-Saharan Africa have been invaded by Chromolaena odorata (Asteraceae), but the consequences for arbuscular mycorrhiza fungi (AMF) remains poorly understood. This study explores changes in diverse AMF community attributes and soil available phosphorus following C. odorata invasion in forest and savanna fragments in Côte d’Ivoire (West Africa). Invaded-forest (COF) and savanna (COS) sites were compared to adjacent natural forest (FOR) and savanna (SAV) fragments, respectively. Physico-chemical variables and AMF spore density parameters were d...

AbstractSubstantial areas of agricultural lands in Sub-Saharan Africa have been invaded by Chromolaena odorata (Asteraceae), but the consequences for arbuscular mycorrhiza fungi (AMF) remains poorly understood. This study explores changes in diverse AMF community attributes and soil available phosphorus following C. odorata invasion in forest and savanna fragments in Côte d’Ivoire (West Africa). Invaded-forest (COF) and savanna (COS) sites were compared to adjacent natural forest (FOR) and savanna (SAV) fragments, respectively. Physico-chemical variables and AMF spore density parameters were d...

AbstractSubstantial areas of agricultural lands in Sub-Saharan Africa have been invaded by Chromolaena odorata (Asteraceae), but the consequences for arbuscular mycorrhiza fungi (AMF) remains poorly understood. This study explores changes in diverse AMF community attributes and soil available phosphorus following C. odorata invasion in forest and savanna fragments in Côte d’Ivoire (West Africa). Invaded-forest (COF) and savanna (COS) sites were compared to adjacent natural forest (FOR) and savanna (SAV) fragments, respectively. Physico-chemical variables and AMF spore density parameters were d...

AbstractSubstantial areas of agricultural lands in Sub-Saharan Africa have been invaded by Chromolaena odorata (Asteraceae), but the consequences for arbuscular mycorrhiza fungi (AMF) remains poorly understood. This study explores changes in diverse AMF community attributes and soil available phosphorus following C. odorata invasion in forest and savanna fragments in Côte d’Ivoire (West Africa). Invaded-forest (COF) and savanna (COS) sites were compared to adjacent natural forest (FOR) and savanna (SAV) fragments, respectively. Physico-chemical variables and AMF spore density parameters were d...

AbstractSubstantial areas of agricultural lands in Sub-Saharan Africa have been invaded by Chromolaena odorata (Asteraceae), but the consequences for arbuscular mycorrhiza fungi (AMF) remains poorly understood. This study explores changes in diverse AMF community attributes and soil available phosphorus following C. odorata invasion in forest and savanna fragments in Côte d’Ivoire (West Africa). Invaded-forest (COF) and savanna (COS) sites were compared to adjacent natural forest (FOR) and savanna (SAV) fragments, respectively. Physico-chemical variables and AMF spore density parameters were d...

AbstractSubstantial areas of agricultural lands in Sub-Saharan Africa have been invaded by Chromolaena odorata (Asteraceae), but the consequences for arbuscular mycorrhiza fungi (AMF) remains poorly understood. This study explores changes in diverse AMF community attributes and soil available phosphorus following C. odorata invasion in forest and savanna fragments in Côte d’Ivoire (West Africa). Invaded-forest (COF) and savanna (COS) sites were compared to adjacent natural forest (FOR) and savanna (SAV) fragments, respectively. Physico-chemical variables and AMF spore density parameters were d...

Objectif : L'étude vise à analyser les caractéristiques structurelles et les performances technico-économiques de la riziculture irriguée en Côte d'Ivoire.Méthodologie et résultats : Un diagnostic socio-économique a été conduit au cours du premier cycle de production de paddy en 2009 et a concerné un échantillon aléatoire de 200 riziculteurs répartis sur quatre départements au niveau des deux principales zones agro écologies du pays. Différents niveaux d'analyse ont été considérés, constitués d'une part des zones agro-écologiques et d'autre part des catégories d'origine sociale des producteurs...

Objectif : L'étude vise à analyser les caractéristiques structurelles et les performances technico-économiques de la riziculture irriguée en Côte d'Ivoire.Méthodologie et résultats : Un diagnostic socio-économique a été conduit au cours du premier cycle de production de paddy en 2009 et a concerné un échantillon aléatoire de 200 riziculteurs répartis sur quatre départements au niveau des deux principales zones agro écologies du pays. Différents niveaux d'analyse ont été considérés, constitués d'une part des zones agro-écologiques et d'autre part des catégories d'origine sociale des producteurs...

A highly repeated DNA sequence from the genome of an arbuscular mycorrhizal fungus has been isolated and characterized. This 1,202-bp sequence (SC1) represents about 0.24% of the Scutellospora castanea genome, estimated to be 1 pg by flow cytometry. The sequence was shown to be a Scutellospora-specific probe in Southern blots and dot blot hybridizations. After complete sequencing of SC1, PCR primers were generated and used to amplify a 907-bp fragment from spores of S. castanea or from colonized Allium porrum roots. No amplification products were obtained with DNA from either spores or mycorrh...

A highly repeated DNA sequence from the genome of an arbuscular mycorrhizal fungus has been isolated and characterized. This 1,202-bp sequence (SC1) represents about 0.24% of the Scutellospora castanea genome, estimated to be 1 pg by flow cytometry. The sequence was shown to be a Scutellospora-specific probe in Southern blots and dot blot hybridizations. After complete sequencing of SC1, PCR primers were generated and used to amplify a 907-bp fragment from spores of S. castanea or from colonized Allium porrum roots. No amplification products were obtained with DNA from either spores or mycorrh...

A highly repeated DNA sequence from the genome of an arbuscular mycorrhizal fungus has been isolated and characterized. This 1,202-bp sequence (SC1) represents about 0.24% of the Scutellospora castanea genome, estimated to be 1 pg by flow cytometry. The sequence was shown to be a Scutellospora-specific probe in Southern blots and dot blot hybridizations. After complete sequencing of SC1, PCR primers were generated and used to amplify a 907-bp fragment from spores of S. castanea or from colonized Allium porrum roots. No amplification products were obtained with DNA from either spores or mycorrh...

A highly repeated DNA sequence from the genome of an arbuscular mycorrhizal fungus has been isolated and characterized. This 1,202-bp sequence (SC1) represents about 0.24% of the Scutellospora castanea genome, estimated to be 1 pg by flow cytometry. The sequence was shown to be a Scutellospora-specific probe in Southern blots and dot blot hybridizations. After complete sequencing of SC1, PCR primers were generated and used to amplify a 907-bp fragment from spores of S. castanea or from colonized Allium porrum roots. No amplification products were obtained with DNA from either spores or mycorrh...

Multispectral microscopy enables information enhancement in the study of specimens because of the large spectral band used in this technique. A low cost multimode multispectral microscope using a camera and a set of quasi-monochromatic Light Emitting Diodes (LEDs) ranging from ultraviolet to near-infrared wavelengths as illumination sources was constructed. But the use of a large spectral band provided by non-monochromatic sources induces variation of focal plan of the imager due to chromatic aberration which rises up the diffraction effects and blurs the images causing shadow around them. It...

Multispectral microscopy enables information enhancement in the study of specimens because of the large spectral band used in this technique. A low cost multimode multispectral microscope using a camera and a set of quasi-monochromatic Light Emitting Diodes (LEDs) ranging from ultraviolet to near-infrared wavelengths as illumination sources was constructed. But the use of a large spectral band provided by non-monochromatic sources induces variation of focal plan of the imager due to chromatic aberration which rises up the diffraction effects and blurs the images causing shadow around them. It...

Multispectral microscopy enables information enhancement in the study of specimens because of the large spectral band used in this technique. A low cost multimode multispectral microscope using a camera and a set of quasi-monochromatic Light Emitting Diodes (LEDs) ranging from ultraviolet to near-infrared wavelengths as illumination sources was constructed. But the use of a large spectral band provided by non-monochromatic sources induces variation of focal plan of the imager due to chromatic aberration which rises up the diffraction effects and blurs the images causing shadow around them. It...

Diffuse reflectance spectroscopy (DRS) is a technique that illuminates the surface of the tissue and analyzes the spectrum of backscattered light, in which the signature of various biochemical species can be identified. This promising technique is established in this article for the non-invasive and in vivo characterization of the optical properties of tissues for diagnostic applications. We have introduced a new compact and inexpensive architecture for DRS based on the use of a multispectral image sensor and LEDs to obtain a diffuse reflectance signal in contact with the skin. For the proof o...

Diffuse reflectance spectroscopy (DRS) is a technique that illuminates the surface of the tissue and analyzes the spectrum of backscattered light, in which the signature of various biochemical species can be identified. This promising technique is established in this article for the non-invasive and in vivo characterization of the optical properties of tissues for diagnostic applications. We have introduced a new compact and inexpensive architecture for DRS based on the use of a multispectral image sensor and LEDs to obtain a diffuse reflectance signal in contact with the skin. For the proof o...

Diffuse reflectance spectroscopy (DRS) is a technique that illuminates the surface of the tissue and analyzes the spectrum of backscattered light, in which the signature of various biochemical species can be identified. This promising technique is established in this article for the non-invasive and in vivo characterization of the optical properties of tissues for diagnostic applications. We have introduced a new compact and inexpensive architecture for DRS based on the use of a multispectral image sensor and LEDs to obtain a diffuse reflectance signal in contact with the skin. For the proof o...

Diffuse reflectance spectroscopy (DRS) is a technique that illuminates the surface of the tissue and analyzes the spectrum of backscattered light, in which the signature of various biochemical species can be identified. This promising technique is established in this article for the non-invasive and in vivo characterization of the optical properties of tissues for diagnostic applications. We have introduced a new compact and inexpensive architecture for DRS based on the use of a multispectral image sensor and LEDs to obtain a diffuse reflectance signal in contact with the skin. For the proof o...

Diffuse reflectance spectroscopy (DRS) is a technique that illuminates the surface of the tissue and analyzes the spectrum of backscattered light, in which the signature of various biochemical species can be identified. This promising technique is established in this article for the non-invasive and in vivo characterization of the optical properties of tissues for diagnostic applications. We have introduced a new compact and inexpensive architecture for DRS based on the use of a multispectral image sensor and LEDs to obtain a diffuse reflectance signal in contact with the skin. For the proof o...

Diffuse reflectance spectroscopy (DRS) is a technique that illuminates the surface of the tissue and analyzes the spectrum of backscattered light, in which the signature of various biochemical species can be identified. This promising technique is established in this article for the non-invasive and in vivo characterization of the optical properties of tissues for diagnostic applications. We have introduced a new compact and inexpensive architecture for DRS based on the use of a multispectral image sensor and LEDs to obtain a diffuse reflectance signal in contact with the skin. For the proof o...

Diffuse reflectance spectroscopy (DRS) is a technique that illuminates the surface of the tissue and analyzes the spectrum of backscattered light, in which the signature of various biochemical species can be identified. This promising technique is established in this article for the non-invasive and in vivo characterization of the optical properties of tissues for diagnostic applications. We have introduced a new compact and inexpensive architecture for DRS based on the use of a multispectral image sensor and LEDs to obtain a diffuse reflectance signal in contact with the skin. For the proof o...

<abstract> <p>In the context of the fight against climate change and the development of renewable and new energies, the management of cashew nutshells is an issue. The physico-chemical and energetic properties of cashew nutshells show that they are good raw materials that can be used in thermochemical processes. Cashew nutshells were heated to temperatures of 300 ℃, 350 ℃ and 400 ℃ for 40 to 120 minutes to extract the liquid from the cashew nutshells. Biochar yields by mass were 46.5–52.8 wt%, 46.2–35.9 wt% and 37.8–30.3 wt% at temperatures of 300 ℃, 350 ℃ and 400 ℃, respectively....

<abstract> <p>In the context of the fight against climate change and the development of renewable and new energies, the management of cashew nutshells is an issue. The physico-chemical and energetic properties of cashew nutshells show that they are good raw materials that can be used in thermochemical processes. Cashew nutshells were heated to temperatures of 300 ℃, 350 ℃ and 400 ℃ for 40 to 120 minutes to extract the liquid from the cashew nutshells. Biochar yields by mass were 46.5–52.8 wt%, 46.2–35.9 wt% and 37.8–30.3 wt% at temperatures of 300 ℃, 350 ℃ and 400 ℃, respectively....

<abstract> <p>In the context of the fight against climate change and the development of renewable and new energies, the management of cashew nutshells is an issue. The physico-chemical and energetic properties of cashew nutshells show that they are good raw materials that can be used in thermochemical processes. Cashew nutshells were heated to temperatures of 300 ℃, 350 ℃ and 400 ℃ for 40 to 120 minutes to extract the liquid from the cashew nutshells. Biochar yields by mass were 46.5–52.8 wt%, 46.2–35.9 wt% and 37.8–30.3 wt% at temperatures of 300 ℃, 350 ℃ and 400 ℃, respectively....

<abstract> <p>In the context of the fight against climate change and the development of renewable and new energies, the management of cashew nutshells is an issue. The physico-chemical and energetic properties of cashew nutshells show that they are good raw materials that can be used in thermochemical processes. Cashew nutshells were heated to temperatures of 300 ℃, 350 ℃ and 400 ℃ for 40 to 120 minutes to extract the liquid from the cashew nutshells. Biochar yields by mass were 46.5–52.8 wt%, 46.2–35.9 wt% and 37.8–30.3 wt% at temperatures of 300 ℃, 350 ℃ and 400 ℃, respectively....

<abstract> <p>In the context of the fight against climate change and the development of renewable and new energies, the management of cashew nutshells is an issue. The physico-chemical and energetic properties of cashew nutshells show that they are good raw materials that can be used in thermochemical processes. Cashew nutshells were heated to temperatures of 300 ℃, 350 ℃ and 400 ℃ for 40 to 120 minutes to extract the liquid from the cashew nutshells. Biochar yields by mass were 46.5–52.8 wt%, 46.2–35.9 wt% and 37.8–30.3 wt% at temperatures of 300 ℃, 350 ℃ and 400 ℃, respectively....

Abstract In this study, the characteristics of Musa Paradisiaca (MP) iron-funtionalysed activated carbon (AC) after adsorption of H 2 S from biogas were demonstrated. The AC was chemically impregnated with potassium hydroxide (KOH) and then carbonised at a temperature of 500°C for 3 hours for activation. The activated carbon was then functionalized with iron oxide (Fe 2 O 3 ) and labelled BANK-Fe. The H 2 S adsorption test was performed on a fixed bed column. The biogas flow rate was 1 L.min − 1 . with 25% water (w/w) added. This test resulted in an adsorption capacity of 9.86 mgH 2 S.g-1 afte...

Abstract In this study, the characteristics of Musa Paradisiaca (MP) iron-funtionalysed activated carbon (AC) after adsorption of H 2 S from biogas were demonstrated. The AC was chemically impregnated with potassium hydroxide (KOH) and then carbonised at a temperature of 500°C for 3 hours for activation. The activated carbon was then functionalized with iron oxide (Fe 2 O 3 ) and labelled BANK-Fe. The H 2 S adsorption test was performed on a fixed bed column. The biogas flow rate was 1 L.min − 1 . with 25% water (w/w) added. This test resulted in an adsorption capacity of 9.86 mgH 2 S.g-1 afte...

Abstract In this study, the characteristics of Musa Paradisiaca (MP) iron-funtionalysed activated carbon (AC) after adsorption of H 2 S from biogas were demonstrated. The AC was chemically impregnated with potassium hydroxide (KOH) and then carbonised at a temperature of 500°C for 3 hours for activation. The activated carbon was then functionalized with iron oxide (Fe 2 O 3 ) and labelled BANK-Fe. The H 2 S adsorption test was performed on a fixed bed column. The biogas flow rate was 1 L.min − 1 . with 25% water (w/w) added. This test resulted in an adsorption capacity of 9.86 mgH 2 S.g-1 afte...

Abstract In this study, the characteristics of Musa Paradisiaca (MP) iron-funtionalysed activated carbon (AC) after adsorption of H 2 S from biogas were demonstrated. The AC was chemically impregnated with potassium hydroxide (KOH) and then carbonised at a temperature of 500°C for 3 hours for activation. The activated carbon was then functionalized with iron oxide (Fe 2 O 3 ) and labelled BANK-Fe. The H 2 S adsorption test was performed on a fixed bed column. The biogas flow rate was 1 L.min − 1 . with 25% water (w/w) added. This test resulted in an adsorption capacity of 9.86 mgH 2 S.g-1 afte...

Abstract In this study, the characteristics of Musa Paradisiaca (MP) iron-funtionalysed activated carbon (AC) after adsorption of H 2 S from biogas were demonstrated. The AC was chemically impregnated with potassium hydroxide (KOH) and then carbonised at a temperature of 500°C for 3 hours for activation. The activated carbon was then functionalized with iron oxide (Fe 2 O 3 ) and labelled BANK-Fe. The H 2 S adsorption test was performed on a fixed bed column. The biogas flow rate was 1 L.min − 1 . with 25% water (w/w) added. This test resulted in an adsorption capacity of 9.86 mgH 2 S.g-1 afte...

Abstract In this study, the characteristics of Musa Paradisiaca (MP) iron-funtionalysed activated carbon (AC) after adsorption of H 2 S from biogas were demonstrated. The AC was chemically impregnated with potassium hydroxide (KOH) and then carbonised at a temperature of 500°C for 3 hours for activation. The activated carbon was then functionalized with iron oxide (Fe 2 O 3 ) and labelled BANK-Fe. The H 2 S adsorption test was performed on a fixed bed column. The biogas flow rate was 1 L.min − 1 . with 25% water (w/w) added. This test resulted in an adsorption capacity of 9.86 mgH 2 S.g-1 afte...

Abstract In this study, the characteristics of Musa Paradisiaca (MP) iron-funtionalysed activated carbon (AC) after adsorption of H 2 S from biogas were demonstrated. The AC was chemically impregnated with potassium hydroxide (KOH) and then carbonised at a temperature of 500°C for 3 hours for activation. The activated carbon was then functionalized with iron oxide (Fe 2 O 3 ) and labelled BANK-Fe. The H 2 S adsorption test was performed on a fixed bed column. The biogas flow rate was 1 L.min − 1 . with 25% water (w/w) added. This test resulted in an adsorption capacity of 9.86 mgH 2 S.g-1 afte...

Abstract In this study, the characteristics of Musa Paradisiaca (MP) iron-funtionalysed activated carbon (AC) after adsorption of H 2 S from biogas were demonstrated. The AC was chemically impregnated with potassium hydroxide (KOH) and then carbonised at a temperature of 500°C for 3 hours for activation. The activated carbon was then functionalized with iron oxide (Fe 2 O 3 ) and labelled BANK-Fe. The H 2 S adsorption test was performed on a fixed bed column. The biogas flow rate was 1 L.min − 1 . with 25% water (w/w) added. This test resulted in an adsorption capacity of 9.86 mgH 2 S.g-1 afte...

Abstract In this study, the characteristics of Musa Paradisiaca (MP) iron-funtionalysed activated carbon (AC) after adsorption of H 2 S from biogas were demonstrated. The AC was chemically impregnated with potassium hydroxide (KOH) and then carbonised at a temperature of 500°C for 3 hours for activation. The activated carbon was then functionalized with iron oxide (Fe 2 O 3 ) and labelled BANK-Fe. The H 2 S adsorption test was performed on a fixed bed column. The biogas flow rate was 1 L.min − 1 . with 25% water (w/w) added. This test resulted in an adsorption capacity of 9.86 mgH 2 S.g-1 afte...

Silicon and Silicon carbide particles have been investigated by the mean of infrared (IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) to establish their surface states. The results of this research are based on the estimation of the area under the high resolution peaks by isosceles triangles. This approach leads to the repartition of the particles surfaces in term of atomic percentage and of type of bonds. The surface of silicon particles is divided up into 54.85% of Si-O bonds and 36.85% of Si-Si bonds. The remaining surface is constituted of zeolite, the raw material used to prod...

Silicon and Silicon carbide particles have been investigated by the mean of infrared (IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) to establish their surface states. The results of this research are based on the estimation of the area under the high resolution peaks by isosceles triangles. This approach leads to the repartition of the particles surfaces in term of atomic percentage and of type of bonds. The surface of silicon particles is divided up into 54.85% of Si-O bonds and 36.85% of Si-Si bonds. The remaining surface is constituted of zeolite, the raw material used to prod...

Silicon and Silicon carbide particles have been investigated by the mean of infrared (IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) to establish their surface states. The results of this research are based on the estimation of the area under the high resolution peaks by isosceles triangles. This approach leads to the repartition of the particles surfaces in term of atomic percentage and of type of bonds. The surface of silicon particles is divided up into 54.85% of Si-O bonds and 36.85% of Si-Si bonds. The remaining surface is constituted of zeolite, the raw material used to prod...

Silicon and Silicon carbide particles have been investigated by the mean of infrared (IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) to establish their surface states. The results of this research are based on the estimation of the area under the high resolution peaks by isosceles triangles. This approach leads to the repartition of the particles surfaces in term of atomic percentage and of type of bonds. The surface of silicon particles is divided up into 54.85% of Si-O bonds and 36.85% of Si-Si bonds. The remaining surface is constituted of zeolite, the raw material used to prod...

Silicon and Silicon carbide particles have been investigated by the mean of infrared (IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) to establish their surface states. The results of this research are based on the estimation of the area under the high resolution peaks by isosceles triangles. This approach leads to the repartition of the particles surfaces in term of atomic percentage and of type of bonds. The surface of silicon particles is divided up into 54.85% of Si-O bonds and 36.85% of Si-Si bonds. The remaining surface is constituted of zeolite, the raw material used to prod...

The boreal summer upwelling along the northern coast of the Gulf of Guinea (GG) is characterized using new in situ sea surface temperature (SST) from onset sensor and satellite TRMM Microwave Imager (TMI) datasets. This study aims to encourage intensive in situ SST measurements at the northern coast of the Gulf of Guinea. It shows good agreement between daily in situ SST and TMI SST and similar coastal upwelling onset date, end date, and durations calculated using both datasets. Interannual evolution of the onset date at four stations along the northern coast of GG indicates that the upwelling...

The boreal summer upwelling along the northern coast of the Gulf of Guinea (GG) is characterized using new in situ sea surface temperature (SST) from onset sensor and satellite TRMM Microwave Imager (TMI) datasets. This study aims to encourage intensive in situ SST measurements at the northern coast of the Gulf of Guinea. It shows good agreement between daily in situ SST and TMI SST and similar coastal upwelling onset date, end date, and durations calculated using both datasets. Interannual evolution of the onset date at four stations along the northern coast of GG indicates that the upwelling...

The boreal summer upwelling along the northern coast of the Gulf of Guinea (GG) is characterized using new in situ sea surface temperature (SST) from onset sensor and satellite TRMM Microwave Imager (TMI) datasets. This study aims to encourage intensive in situ SST measurements at the northern coast of the Gulf of Guinea. It shows good agreement between daily in situ SST and TMI SST and similar coastal upwelling onset date, end date, and durations calculated using both datasets. Interannual evolution of the onset date at four stations along the northern coast of GG indicates that the upwelling...

The boreal summer upwelling along the northern coast of the Gulf of Guinea (GG) is characterized using new in situ sea surface temperature (SST) from onset sensor and satellite TRMM Microwave Imager (TMI) datasets. This study aims to encourage intensive in situ SST measurements at the northern coast of the Gulf of Guinea. It shows good agreement between daily in situ SST and TMI SST and similar coastal upwelling onset date, end date, and durations calculated using both datasets. Interannual evolution of the onset date at four stations along the northern coast of GG indicates that the upwelling...

The boreal summer upwelling along the northern coast of the Gulf of Guinea (GG) is characterized using new in situ sea surface temperature (SST) from onset sensor and satellite TRMM Microwave Imager (TMI) datasets. This study aims to encourage intensive in situ SST measurements at the northern coast of the Gulf of Guinea. It shows good agreement between daily in situ SST and TMI SST and similar coastal upwelling onset date, end date, and durations calculated using both datasets. Interannual evolution of the onset date at four stations along the northern coast of GG indicates that the upwelling...

The boreal summer upwelling along the northern coast of the Gulf of Guinea (GG) is characterized using new in situ sea surface temperature (SST) from onset sensor and satellite TRMM Microwave Imager (TMI) datasets. This study aims to encourage intensive in situ SST measurements at the northern coast of the Gulf of Guinea. It shows good agreement between daily in situ SST and TMI SST and similar coastal upwelling onset date, end date, and durations calculated using both datasets. Interannual evolution of the onset date at four stations along the northern coast of GG indicates that the upwelling...

In this study, we propose an unsupervised classification scheme based on the Dempster-Shafer Theory (TDS) and the Dezert-Smarandache Theory (DSmT) to characterize vegetated, aquatic and mineral surfaces. From pre-processed ASTER satellite images (georeferencing, geometric correction and 15 m re-sampling), neo-channels were produced by determining the spectral indices NDVI, MNDWI and NDBaI, considered as sources of information for classification of a given pixel. NDVI is a contrast function to highlight vegetation. By account, the MNDWI makes it possible to characterize the water and the NDBaI...

In this study, we propose an unsupervised classification scheme based on the Dempster-Shafer Theory (TDS) and the Dezert-Smarandache Theory (DSmT) to characterize vegetated, aquatic and mineral surfaces. From pre-processed ASTER satellite images (georeferencing, geometric correction and 15 m re-sampling), neo-channels were produced by determining the spectral indices NDVI, MNDWI and NDBaI, considered as sources of information for classification of a given pixel. NDVI is a contrast function to highlight vegetation. By account, the MNDWI makes it possible to characterize the water and the NDBaI...

In this study, we propose an unsupervised classification scheme based on the Dempster-Shafer Theory (TDS) and the Dezert-Smarandache Theory (DSmT) to characterize vegetated, aquatic and mineral surfaces. From pre-processed ASTER satellite images (georeferencing, geometric correction and 15 m re-sampling), neo-channels were produced by determining the spectral indices NDVI, MNDWI and NDBaI, considered as sources of information for classification of a given pixel. NDVI is a contrast function to highlight vegetation. By account, the MNDWI makes it possible to characterize the water and the NDBaI...

In this study, we propose an unsupervised classification scheme based on the Dempster-Shafer Theory (TDS) and the Dezert-Smarandache Theory (DSmT) to characterize vegetated, aquatic and mineral surfaces. From pre-processed ASTER satellite images (georeferencing, geometric correction and 15 m re-sampling), neo-channels were produced by determining the spectral indices NDVI, MNDWI and NDBaI, considered as sources of information for classification of a given pixel. NDVI is a contrast function to highlight vegetation. By account, the MNDWI makes it possible to characterize the water and the NDBaI...

The Sassandra Basin, like most regions of Côte d’Ivoire, is increasingly affected by droughts that involve many environmental, social and economic impacts. This basin is full of several amenities such as hydroelectric dams, hydraulic and agricultural dams. There is also a strong agricultural activity. In the context of climate change, it is essential to analyze the occurrence of droughts in order to propose mitigation or adaptation measures for water management. The methodological approach consisted initially in characterizing the dry sequences by the use of the SPI (Standardized Precipitation...

The Sassandra Basin, like most regions of Côte d’Ivoire, is increasingly affected by droughts that involve many environmental, social and economic impacts. This basin is full of several amenities such as hydroelectric dams, hydraulic and agricultural dams. There is also a strong agricultural activity. In the context of climate change, it is essential to analyze the occurrence of droughts in order to propose mitigation or adaptation measures for water management. The methodological approach consisted initially in characterizing the dry sequences by the use of the SPI (Standardized Precipitation...

The Sassandra Basin, like most regions of Côte d’Ivoire, is increasingly affected by droughts that involve many environmental, social and economic impacts. This basin is full of several amenities such as hydroelectric dams, hydraulic and agricultural dams. There is also a strong agricultural activity. In the context of climate change, it is essential to analyze the occurrence of droughts in order to propose mitigation or adaptation measures for water management. The methodological approach consisted initially in characterizing the dry sequences by the use of the SPI (Standardized Precipitation...

The Sassandra Basin, like most regions of Côte d’Ivoire, is increasingly affected by droughts that involve many environmental, social and economic impacts. This basin is full of several amenities such as hydroelectric dams, hydraulic and agricultural dams. There is also a strong agricultural activity. In the context of climate change, it is essential to analyze the occurrence of droughts in order to propose mitigation or adaptation measures for water management. The methodological approach consisted initially in characterizing the dry sequences by the use of the SPI (Standardized Precipitation...

The Sassandra Basin, like most regions of Côte d’Ivoire, is increasingly affected by droughts that involve many environmental, social and economic impacts. This basin is full of several amenities such as hydroelectric dams, hydraulic and agricultural dams. There is also a strong agricultural activity. In the context of climate change, it is essential to analyze the occurrence of droughts in order to propose mitigation or adaptation measures for water management. The methodological approach consisted initially in characterizing the dry sequences by the use of the SPI (Standardized Precipitation...

Objectives: the main objective of this study is to characterize the weed floristic diversity of the Bongo rubber trees plantation and to provide a map for sustainable weed managementMethodology and results: a floristic survey of the Para rubber plantations of Bongo (Southeast Côte d’Ivoire) was conducted in 2007 and early 2008. The field tour method was used for weed inventory in 27 plots of 25 ha of different ages. Moreover, the coverage rate of weeds was estimated in samples of 100 square meters each for every plot. Weeds flora is composed of 168 species scattered in the entire rubber trees...

Objectives: the main objective of this study is to characterize the weed floristic diversity of the Bongo rubber trees plantation and to provide a map for sustainable weed managementMethodology and results: a floristic survey of the Para rubber plantations of Bongo (Southeast Côte d’Ivoire) was conducted in 2007 and early 2008. The field tour method was used for weed inventory in 27 plots of 25 ha of different ages. Moreover, the coverage rate of weeds was estimated in samples of 100 square meters each for every plot. Weeds flora is composed of 168 species scattered in the entire rubber trees...

Objectives: the main objective of this study is to characterize the weed floristic diversity of the Bongo rubber trees plantation and to provide a map for sustainable weed managementMethodology and results: a floristic survey of the Para rubber plantations of Bongo (Southeast Côte d’Ivoire) was conducted in 2007 and early 2008. The field tour method was used for weed inventory in 27 plots of 25 ha of different ages. Moreover, the coverage rate of weeds was estimated in samples of 100 square meters each for every plot. Weeds flora is composed of 168 species scattered in the entire rubber trees...

Objectives: the main objective of this study is to characterize the weed floristic diversity of the Bongo rubber trees plantation and to provide a map for sustainable weed managementMethodology and results: a floristic survey of the Para rubber plantations of Bongo (Southeast Côte d’Ivoire) was conducted in 2007 and early 2008. The field tour method was used for weed inventory in 27 plots of 25 ha of different ages. Moreover, the coverage rate of weeds was estimated in samples of 100 square meters each for every plot. Weeds flora is composed of 168 species scattered in the entire rubber trees...

Objectives: the main objective of this study is to characterize the weed floristic diversity of the Bongo rubber trees plantation and to provide a map for sustainable weed managementMethodology and results: a floristic survey of the Para rubber plantations of Bongo (Southeast Côte d’Ivoire) was conducted in 2007 and early 2008. The field tour method was used for weed inventory in 27 plots of 25 ha of different ages. Moreover, the coverage rate of weeds was estimated in samples of 100 square meters each for every plot. Weeds flora is composed of 168 species scattered in the entire rubber trees...

In Ivory Coast, particularly in the south, most paved and unpaved roads are made of clayey sand, given its availability. The early degradation of roads is related to a strong sensitivity of certain materials to the environment (climate, geology, and degrees of alteration) and a poor knowledge of the geotechnical properties could slow down their use in road construction. Within this framework, this paper focuses on determining the chemico-mineralogical nature of the clayey sands of the localities of Bingerville and Samo, in the South-East of Ivory Coast. Tests were conducted based on the chemic...

In Ivory Coast, particularly in the south, most paved and unpaved roads are made of clayey sand, given its availability. The early degradation of roads is related to a strong sensitivity of certain materials to the environment (climate, geology, and degrees of alteration) and a poor knowledge of the geotechnical properties could slow down their use in road construction. Within this framework, this paper focuses on determining the chemico-mineralogical nature of the clayey sands of the localities of Bingerville and Samo, in the South-East of Ivory Coast. Tests were conducted based on the chemic...

In Ivory Coast, particularly in the south, most paved and unpaved roads are made of clayey sand, given its availability. The early degradation of roads is related to a strong sensitivity of certain materials to the environment (climate, geology, and degrees of alteration) and a poor knowledge of the geotechnical properties could slow down their use in road construction. Within this framework, this paper focuses on determining the chemico-mineralogical nature of the clayey sands of the localities of Bingerville and Samo, in the South-East of Ivory Coast. Tests were conducted based on the chemic...

In Ivory Coast, particularly in the south, most paved and unpaved roads are made of clayey sand, given its availability. The early degradation of roads is related to a strong sensitivity of certain materials to the environment (climate, geology, and degrees of alteration) and a poor knowledge of the geotechnical properties could slow down their use in road construction. Within this framework, this paper focuses on determining the chemico-mineralogical nature of the clayey sands of the localities of Bingerville and Samo, in the South-East of Ivory Coast. Tests were conducted based on the chemic...

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Abstract This study was carried out with the aim of reusing waste water from the Me factory by proposing an innovative and sustainable solution, with a view to reducing the environmental impact of discharges and maximizing the reuse of this precious water resource. This involves proposing a recirculation system which will make it possible to use all of the water discharged while maintaining water quality at levels consistent with environmental standards. To do this, physicochemical and bacteriological analyzes were carried out on the waste water in order to assess their quality. Then, the Draw...

Abstract This study was carried out with the aim of reusing waste water from the Me factory by proposing an innovative and sustainable solution, with a view to reducing the environmental impact of discharges and maximizing the reuse of this precious water resource. This involves proposing a recirculation system which will make it possible to use all of the water discharged while maintaining water quality at levels consistent with environmental standards. To do this, physicochemical and bacteriological analyzes were carried out on the waste water in order to assess their quality. Then, the Draw...