Mesoporous alumina was prepared by using starch as the structure-directing template in an aqueous system. The resultant samples were characterized by using different methods such as the X-ray diffractometry,the transm...Mesoporous alumina was prepared by using starch as the structure-directing template in an aqueous system. The resultant samples were characterized by using different methods such as the X-ray diffractometry,the transmission electron microscopy,the nitrogen adsorption-desorption analysis and the solid MAS NMR. The results showed that the prepared mesoporous γ-alumina had high surface area and uniform pore size distribution,and its specific surface area and the pore size could be tuned by changing the pH value of the starting solution.展开更多
The green algae of Order Chaetophorales distributed in Yellow-Bohai Sea of China are studied. More 3 species belonging respectively to 3 different genera are reported for the first time,viz. Entocladia viridis Reinke,...The green algae of Order Chaetophorales distributed in Yellow-Bohai Sea of China are studied. More 3 species belonging respectively to 3 different genera are reported for the first time,viz. Entocladia viridis Reinke, Pringsheimiella scutata (Reinke) Hhnel ex Marchewianka and Ulvella lens P.L. Crouan et H.M. Crouan, with a simple key. Entocladia viridis is different from other species in some features, such as disengaged branches in the external frond with concrescent midsection to distinct cells, irregular, slight swollen and sometime distorted at midsection, and column at external frond with 5～8 μm diameter and 1～5 times high to diameter. This species is found in Qingdao and Yantai, Shandong Province, and inner epiphytic to algae, especially to red algae. Pringsheimiella scutata (Reinke) Hhnel ex Marchewianka is different from other species in the shield frond of one cell layer, 1～2 mm diam., absent rhizoid, with ridgy center cells and flat marginal ones. This species is found in the Yellow Sea, and epiphytic to macroalgae, especially seen at the frond of genus Polysiphonia. Ulvella lens P.L. Crouan et H.M. Crouan is different from other species in the plate-like frond, ridgy midsection, with 1.5 mm diam. And 150～250 μm thick, small cells at midsection with usually 2～3 cells layers and 8～15 μm diameter, big cells at approximate margin of frond with 10～15 μm diameter and 20～30 μm long, cuneate cells at the margin of frond with 1 cell layer, 3.5～4.5 μm diameter and 15～25 μm long. This species is found in Qingdao, Shandong Province, and epiphytic to macroalgae, especially to the frond surface of red algae.展开更多
Alzheimer＇s disease（AD） is a neurodegenerative disease characterized by extracellular amyloid beta（Aβ） deposition and intracellular neurofibrillary tangle formation.Monocyte is part of the innate immune system a...Alzheimer＇s disease（AD） is a neurodegenerative disease characterized by extracellular amyloid beta（Aβ） deposition and intracellular neurofibrillary tangle formation.Monocyte is part of the innate immune system and can effectively remove dead cells and debris.It has been suggested that Aβ can recruit monocytes into brain in AD mice,resulting in restriction of cerebral amyloidosis.However,monocyte may act as a double-edged sword,either beneficial（e.g.,clearance of Aβ） or detrimental（e.g.,secretion of neurotoxic factors）.In addition,recent studies indicate that in AD patients,Aβ phagocytosis by monocytes is ineffective.The present review mainly summarized the current knowledge on monocytes and their potential roles in AD.展开更多
文摘Mesoporous alumina was prepared by using starch as the structure-directing template in an aqueous system. The resultant samples were characterized by using different methods such as the X-ray diffractometry,the transmission electron microscopy,the nitrogen adsorption-desorption analysis and the solid MAS NMR. The results showed that the prepared mesoporous γ-alumina had high surface area and uniform pore size distribution,and its specific surface area and the pore size could be tuned by changing the pH value of the starting solution.
文摘The green algae of Order Chaetophorales distributed in Yellow-Bohai Sea of China are studied. More 3 species belonging respectively to 3 different genera are reported for the first time,viz. Entocladia viridis Reinke, Pringsheimiella scutata (Reinke) Hhnel ex Marchewianka and Ulvella lens P.L. Crouan et H.M. Crouan, with a simple key. Entocladia viridis is different from other species in some features, such as disengaged branches in the external frond with concrescent midsection to distinct cells, irregular, slight swollen and sometime distorted at midsection, and column at external frond with 5～8 μm diameter and 1～5 times high to diameter. This species is found in Qingdao and Yantai, Shandong Province, and inner epiphytic to algae, especially to red algae. Pringsheimiella scutata (Reinke) Hhnel ex Marchewianka is different from other species in the shield frond of one cell layer, 1～2 mm diam., absent rhizoid, with ridgy center cells and flat marginal ones. This species is found in the Yellow Sea, and epiphytic to macroalgae, especially seen at the frond of genus Polysiphonia. Ulvella lens P.L. Crouan et H.M. Crouan is different from other species in the plate-like frond, ridgy midsection, with 1.5 mm diam. And 150～250 μm thick, small cells at midsection with usually 2～3 cells layers and 8～15 μm diameter, big cells at approximate margin of frond with 10～15 μm diameter and 20～30 μm long, cuneate cells at the margin of frond with 1 cell layer, 3.5～4.5 μm diameter and 15～25 μm long. This species is found in Qingdao, Shandong Province, and epiphytic to macroalgae, especially to the frond surface of red algae.
文摘Alzheimer＇s disease（AD） is a neurodegenerative disease characterized by extracellular amyloid beta（Aβ） deposition and intracellular neurofibrillary tangle formation.Monocyte is part of the innate immune system and can effectively remove dead cells and debris.It has been suggested that Aβ can recruit monocytes into brain in AD mice,resulting in restriction of cerebral amyloidosis.However,monocyte may act as a double-edged sword,either beneficial（e.g.,clearance of Aβ） or detrimental（e.g.,secretion of neurotoxic factors）.In addition,recent studies indicate that in AD patients,Aβ phagocytosis by monocytes is ineffective.The present review mainly summarized the current knowledge on monocytes and their potential roles in AD.
