Felix Odhiambo - Academia.edu (original) (raw)

Papers by Felix Odhiambo

Research paper thumbnail of A novel microbial electrochemical sensor for on-line monitoring anaerobic biogradation processes

Research paper thumbnail of New urban economies': challenges ahead

Europe’s urban economies do not look the same as ten years ago. And in ten years from now,they wi... more Europe’s urban economies do not look the same as ten years ago. And in ten years from now,they will again be different. The digital revolution is particularly disruptive: entire sectors are being transformed, old players are losing out, newcomers are taking over, and competition is fiercer than ever. At the same time, citizens are not just workers in companies, but many become independent entrepreneurs, and active producers. Innovation is becoming open, involving interaction between companies, universities and users. Working, living and recreation become intertwined in place and time.

Research paper thumbnail of PSIX-23 Inclusion of cocoa husks in the diet for fattening pigs on lipid composition of backfat and muscle

Journal of Animal Science, 2019

Cocoa husks are by-products of chocolate production, characterized by a high content of dietary f... more Cocoa husks are by-products of chocolate production, characterized by a high content of dietary fibre, proteins, lipids and polyphenols, which exert antioxidant activity. The present study investigated the effect of dietary inclusion of cocoa husks on the lipid composition of pig backfat and muscle. Eight finishing pigs were randomly assigned to one of two groups: CTRL, fed a conventional cereal-based diet, and COCOA, fed a diet obtained by substitution of 10% of the control diet with coarsely ground cocoa husks. After 6 weeks, pigs were slaughtered. During the experimental period, the dietary composition was analysed, nutrient digestibility of the diets and N balance were determined. At slaughtering, samples of backfat and Biceps brachii muscle were collected. Total lipids were extracted from samples and analysed for cholesterol content and for fatty acid composition. The experimental diets were isoproteic and isoenergetic, but polyphenolic content was 90% higher in COCOA than CTRL...

Research paper thumbnail of Single-chamber microbial fuel cells as on-line shock-sensors for volatile fatty acids in anaerobic digesters

Waste management (New York, N.Y.), 2018

In anaerobic digesters (AD), volatile fatty acids (VFAs) concentration is a critical operative pa... more In anaerobic digesters (AD), volatile fatty acids (VFAs) concentration is a critical operative parameter, which is usually manually monitored to prevent inhibition of microbial consortia. An on-line VFAs monitoring system as early-warning for increasing concentrations would be of great help for operators. Here, air-cathode membraneless microbial fuel cells (MFCs) were investigated as potential biosensors, whose electrical signal instantaneously moves from its steady value with the accumulation of VFAs in the anodic solution. MFCs were operated equipping four lab-scale ADs with carbon-based electrodes. Reactors were filled with the digestate from a full-scale AD and fed in batch with four kinds of feedstock (cheese whey, kitchen waste, citrus pulp and fishery waste). The MFC signal initially increased in parallel to VFAs production, then tended to a steady value for VFAs concentrations above 1000mgL. Peak concentrations of tVFAs (2500-4500mgL) and MFCs potentials were negatively corr...

Research paper thumbnail of Deformation histories as recorded by serpentinites; 1, Deformation prior to serpentinization

The Canadian Mineralogist, 1984

Serpentine minerals can be actively involved in deformation, and the form they take reflects the ... more Serpentine minerals can be actively involved in deformation, and the form they take reflects the conditions under which the deformation occurred. By combining the results of published experimental studies on serpentine deformation with observations on naturally deformed samples, the types and conditions of deformation can be recognized. Naturally deformed antigorite serpentinites correspond well with the results of experimental deformation. Thus. at low confining pressures and low to intermediate tempeiatures, antigorite serpentinites fail by brittle fracture, At high confining pressures and low to intermediate temperatures, they fail by ductile solid flow; at low to high confining pressures and high temperatures, they fail by brittle fractuie due ro the dehydroxylation of antigorite. Naturally deformed lizardite and chrysolite serpentinites correspond with the experimental results in some cases only. In the other cases, the discrepancy with experimental results might simply indicate that the appropriate samples have not been obtained. But it must also be, in part, related to the fact that lizardite and chrysotile, before deforming by pure plastic flow or by dehydroxylation, will first alter to antigorite during the long time-spans in which deformation takes place in nature.

Research paper thumbnail of β2-Adrenoceptor agonists increase plasma volume in cirrhosis

Journal of Hepatology, 1989

Research paper thumbnail of A novel microbial electrochemical sensor for on-line monitoring anaerobic biogradation processes

Research paper thumbnail of New urban economies': challenges ahead

Europe’s urban economies do not look the same as ten years ago. And in ten years from now,they wi... more Europe’s urban economies do not look the same as ten years ago. And in ten years from now,they will again be different. The digital revolution is particularly disruptive: entire sectors are being transformed, old players are losing out, newcomers are taking over, and competition is fiercer than ever. At the same time, citizens are not just workers in companies, but many become independent entrepreneurs, and active producers. Innovation is becoming open, involving interaction between companies, universities and users. Working, living and recreation become intertwined in place and time.

Research paper thumbnail of PSIX-23 Inclusion of cocoa husks in the diet for fattening pigs on lipid composition of backfat and muscle

Journal of Animal Science, 2019

Cocoa husks are by-products of chocolate production, characterized by a high content of dietary f... more Cocoa husks are by-products of chocolate production, characterized by a high content of dietary fibre, proteins, lipids and polyphenols, which exert antioxidant activity. The present study investigated the effect of dietary inclusion of cocoa husks on the lipid composition of pig backfat and muscle. Eight finishing pigs were randomly assigned to one of two groups: CTRL, fed a conventional cereal-based diet, and COCOA, fed a diet obtained by substitution of 10% of the control diet with coarsely ground cocoa husks. After 6 weeks, pigs were slaughtered. During the experimental period, the dietary composition was analysed, nutrient digestibility of the diets and N balance were determined. At slaughtering, samples of backfat and Biceps brachii muscle were collected. Total lipids were extracted from samples and analysed for cholesterol content and for fatty acid composition. The experimental diets were isoproteic and isoenergetic, but polyphenolic content was 90% higher in COCOA than CTRL...

Research paper thumbnail of Single-chamber microbial fuel cells as on-line shock-sensors for volatile fatty acids in anaerobic digesters

Waste management (New York, N.Y.), 2018

In anaerobic digesters (AD), volatile fatty acids (VFAs) concentration is a critical operative pa... more In anaerobic digesters (AD), volatile fatty acids (VFAs) concentration is a critical operative parameter, which is usually manually monitored to prevent inhibition of microbial consortia. An on-line VFAs monitoring system as early-warning for increasing concentrations would be of great help for operators. Here, air-cathode membraneless microbial fuel cells (MFCs) were investigated as potential biosensors, whose electrical signal instantaneously moves from its steady value with the accumulation of VFAs in the anodic solution. MFCs were operated equipping four lab-scale ADs with carbon-based electrodes. Reactors were filled with the digestate from a full-scale AD and fed in batch with four kinds of feedstock (cheese whey, kitchen waste, citrus pulp and fishery waste). The MFC signal initially increased in parallel to VFAs production, then tended to a steady value for VFAs concentrations above 1000mgL. Peak concentrations of tVFAs (2500-4500mgL) and MFCs potentials were negatively corr...

Research paper thumbnail of Deformation histories as recorded by serpentinites; 1, Deformation prior to serpentinization

The Canadian Mineralogist, 1984

Serpentine minerals can be actively involved in deformation, and the form they take reflects the ... more Serpentine minerals can be actively involved in deformation, and the form they take reflects the conditions under which the deformation occurred. By combining the results of published experimental studies on serpentine deformation with observations on naturally deformed samples, the types and conditions of deformation can be recognized. Naturally deformed antigorite serpentinites correspond well with the results of experimental deformation. Thus. at low confining pressures and low to intermediate tempeiatures, antigorite serpentinites fail by brittle fracture, At high confining pressures and low to intermediate temperatures, they fail by ductile solid flow; at low to high confining pressures and high temperatures, they fail by brittle fractuie due ro the dehydroxylation of antigorite. Naturally deformed lizardite and chrysolite serpentinites correspond with the experimental results in some cases only. In the other cases, the discrepancy with experimental results might simply indicate that the appropriate samples have not been obtained. But it must also be, in part, related to the fact that lizardite and chrysotile, before deforming by pure plastic flow or by dehydroxylation, will first alter to antigorite during the long time-spans in which deformation takes place in nature.

Research paper thumbnail of β2-Adrenoceptor agonists increase plasma volume in cirrhosis

Journal of Hepatology, 1989