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Articles by Michel Parmentier
Total Records ( 3 ) for Michel Parmentier
  Cesar Kapseu , Bernadette Piffaut , Michel Parmentier and Cesar Kapseu
  Studies were conducted on the textural and biochemical changes occurring in Canarium schweinfurthii Eng fruits, after harvest, in an attempt to study the physical and chemical changes associated with the raw, stored and heat treated samples. The fruits were harvested and stored for 7 days (Stored Hardened fruits), heat treated at 45 C for 40 min (Heat Softened fruits) and heat treated at 70 C for 40 min (Heat Hardened fruit). The samples were evaluated for their textural properties, moisture, reducing sugars, total soluble sugars, ash, protein, starch, cellulose, lignin and uronic acids. The hardness of the fruits increased in with storage (15.83 to 20.71 N respectively for raw fruits and stored hardened fruits), while the shear force vary from 0.77 to 5.41 N (respectively for heat softened fruits and heat hardened fruits), making the consumption of heat hardened fruits impossible. Chemical analysis showed no significant differences (P < 0.05) between the values obtained for ash, protein, minerals (Na, K, Mg). The moisture of the pulp decreased from 49.32 to 39.90% in a period of 7 days of storage, suggesting that there was dehydration after harvest. Uronic acid, cellulose and lignin increased during storage. Heat hardened pulp showed different changes in the chemical indices than those stored at 22 C for 7 days, suggesting another mechanism of hardening.
  Bertille Carine Tchankou Leudeu , Clerge Tchiegang , Michel Dzondo Gadet , Francoise Barbe , Benedicte Nicolas , Selestin Sokeng , Paul Moundipa Fewou , Cesar Kapseu , Michel Parmentier and Jean-Louis Gueant
  The aim of this study was to compare the effects of two vegetable oils on the growth, blood lipids, lipid peroxidation and oxidative stress in rats. One month old male rats Sprague Dawley were fed during 60 days with a diet containing Canarium schweinfurthii oil (CSO group), or Dacryodes edulis oil (DEO group), or palm oil (PO group). Palm oil was used as control. On 6 rats before the experimentation (baseline group) and on rats fed different diets, serum were used for total cholesterol, HDL-cholesterol, LDL-cholesterol, triglycerides, glycerol, creatinine, alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, bilirubine determinations. Plasma were used for fatty acids, selenium and malondialdehyde determination. Glutathione peroxydase and superoxyde dismutase were measured in red blood cells. The daily food intake was different from one group to another.During the first month of the experiment, CSO diet was the most consummed. The gain in body weight was highest for the PO group. This group presents a high value of triglycerides, glycerol and asparatate aminotransferase compare to CSO and DEO groups. HDL-cholesterol, creatinine, alaninine aminotransferase, alkaline phosphatase, total bilirubine malondialdehyde and selenium level was not significantly different (p<0.05) for rats fed PO, CSO and DEO diets. Oils experimented contribute to the decrease the LDL-cholesterol level for over 50% in comparison of the baseline group. The atherogenicity index is highest for baseline group than PO, CSO and DEO groups. Oils experimented influenced glycerol, alanine aminotransferase level. We can conclude that oils experimented decrease the risk factor of cardiovascular disease to 43.91% for CSO and DEOgroups and to 39.30% for PO group.
  Hilaire Macaire Womeni , Michel Linder , Bernard Tiencheu , Felicite Tchouanguep Mbiapo , Pierre Villeneuve , Jacques Fanni and Michel Parmentier
  Two unusual oils, obtained from Oryctes owariensis (raphia weevil) and Homorocoryphus nitidulus (crickets) collected in Cameroon were investigated. In addition to the oil content extracted with hexane in Soxhlet, the fatty acid composition as well as differents class of lipids was determined, respectively by CPG and TLC-FID-Iastroscan. The oil content of insects Oryctes owariensis amounted to 53.75% whereas, Homorocoryphus nitidulus came to 67.25%. The oils contained 45.46 and 45.63% of linoleic acid, 37.60 and 27.59% of palmitoleic acid, 4.19 and 16.19% of linolenic, respectively for raphia weevil and crickets oils. The total PUFA and UFA ranged, respectively from 50.86 and 94.49% in Oryctes owariensis and 62.39 and 97.14% in Homorocoryphus nitidulus. Results also showed that the ratios of PUFA/SFA ranged to 16.70 and 105.75. The neutral lipids (TAG 91-93%) were the predominant class of fat amount fatty acids. These 2 insects may be an alternative potential source of essential fatty acids: linoleic acid.
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