Different coastal sands of the city of El Jadida are used to filter wastewater from a cardboard manufacturing plant combined with fly ash and bottom ash （by-products of a local power plant）. The performances of five...Different coastal sands of the city of El Jadida are used to filter wastewater from a cardboard manufacturing plant combined with fly ash and bottom ash （by-products of a local power plant）. The performances of five matrices of these elements are compared in infiltration-percolation in vertical columns. The study of particle size sand is performed beforehand. The chemical and mineralogical composition of fly ash and bottom ash are produced by X-ray fluorescence and X-ray diffraction respectively. The wastewater samples were collected during a complete cycle of production of the cardboard. The heavy metals content before and after filtration was obtained by atomic emission spectrometry with inductively coupled plasma （ICP-AES）. The parameters analyzed were： total suspended solids （TSS）, organic matter COD, BODs, the potential hydrogen pH and heavy metals （iron, zinc and arsenic）. The results are very conclusive and respect the essence of control required by Moroccan regulations （law 1606-06） related to discharges from the papermaking and cardboard industry.展开更多
By uaing enzyme digestion and Flcoll- Hypaque or Percoll discontinuous density methods, we have successfully obtained tumor-infiltrating lymphocytes (TIL) from mouse hepatoma. When analyzing the purity of TIL after se...By uaing enzyme digestion and Flcoll- Hypaque or Percoll discontinuous density methods, we have successfully obtained tumor-infiltrating lymphocytes (TIL) from mouse hepatoma. When analyzing the purity of TIL after separation. It was found that Percoll was more effective than Flcoll (P<0. 01). TIL could be activated In the presence of recombinant lL-2 (rIL-2) and begin to expand after culturing for 5-7 days, the tumor cells tend to decrease and disappeared after 14 days or so. TIL increased 105-fold over 40 days. Conditioned medium containing supernatant of PHA and rIL- 2 stimulated syngeneic spleen cell culture could promote the expansion of TIL.展开更多
文摘Different coastal sands of the city of El Jadida are used to filter wastewater from a cardboard manufacturing plant combined with fly ash and bottom ash （by-products of a local power plant）. The performances of five matrices of these elements are compared in infiltration-percolation in vertical columns. The study of particle size sand is performed beforehand. The chemical and mineralogical composition of fly ash and bottom ash are produced by X-ray fluorescence and X-ray diffraction respectively. The wastewater samples were collected during a complete cycle of production of the cardboard. The heavy metals content before and after filtration was obtained by atomic emission spectrometry with inductively coupled plasma （ICP-AES）. The parameters analyzed were： total suspended solids （TSS）, organic matter COD, BODs, the potential hydrogen pH and heavy metals （iron, zinc and arsenic）. The results are very conclusive and respect the essence of control required by Moroccan regulations （law 1606-06） related to discharges from the papermaking and cardboard industry.
文摘By uaing enzyme digestion and Flcoll- Hypaque or Percoll discontinuous density methods, we have successfully obtained tumor-infiltrating lymphocytes (TIL) from mouse hepatoma. When analyzing the purity of TIL after separation. It was found that Percoll was more effective than Flcoll (P<0. 01). TIL could be activated In the presence of recombinant lL-2 (rIL-2) and begin to expand after culturing for 5-7 days, the tumor cells tend to decrease and disappeared after 14 days or so. TIL increased 105-fold over 40 days. Conditioned medium containing supernatant of PHA and rIL- 2 stimulated syngeneic spleen cell culture could promote the expansion of TIL.
