Seasonal response of nitrogen exchange fluxes to crab disturbance at sediment-water interface in coastal tidal wetlands

Coastal wetlands are hotspots for nitrogen(N)cycling,and crab burrowing is known to transform N in intertidal marsh soils.However,the underlying mechanisms remain unclear.This study conducted field experiments and used indoor control test devices to investigate the seasonal response of nitrogen to crab disturbance at the sediment-water interface in coastal tidal flat wetlands.The results showed that crab disturbance exhibited significant seasonality with large seasonal differences in cave density and depth.Due to crab disturbance,nitrogen fuxes at the sediment-water interface were much greater in the box with crabs than in the box without crabs.In summer,NH-N showed a positive flux from the sediment to the overlying water,but NO2-N and NOg-N showed positive fluxes from the sediment to the overlying water only in early stages.In winter,NH-N showed a positive flux from the sediment to the overlying water,but NO-N and NO,-N both exhibited positive and negative fluxes.These results indicated that the presence of crab burrows can cause the aerobic layer to move downward by approximately 8-15 cm in summer and directly promote nitrification at the sediment surface.

Differences in expression of retinal proteins between diabetic and normal rats

瞄准：为了在在正常、糖尿病的老鼠之间的网膜的蛋白质的表示比较并且识别差别，并且分析网膜的疾病的分子的病原的机制，由糖尿病引起了。方法：在从糖尿病、正常的老鼠的网膜的纸巾的蛋白质表示的变化用 2-dimensional polyacrylamide 胶化电气泳动(2-DE ) 被观察。展出统计上重要的变化的一些蛋白质点(P 【 0.05 ) 随机被选择并且由双人脚踏车团分光术识别了并且由生物信息学分析了。结果：2-DE 证明表示在 5 网膜的蛋白质是起来调整的，在 23 网膜的蛋白质下面调整，并且消失在 8 网膜的蛋白质。八个点被双人脚踏车团分光术(MS/MS ) 从 36 个点识别并且由生物信息学分析了。Guanylate 激酶 1， triosephosphate 异构酶 1， 2 玩了的 ATP synthase 子单元 d，白朊和 dimethylarginine dimethylaminohydrolase 在信号转导变异的一个重要角色。Triosephosphate 异构酶 1，晶状体蛋白高山哈 B， ATP synthase 子单元 d 和 peroxiredoxin 6 涉及网膜的纸巾的能代谢。1 玩了的 Guanylate 激酶在网膜的杆光敏电阻器房间的相片刺激的一个重要角色。晶状体蛋白贝它 A1 是否在糖尿病的视网膜起一个作用，到目前为止是未知的。结论：在在糖尿病、正常的老鼠之间的网膜的蛋白质的表示有差别。这些蛋白质可以涉及糖尿病引起的网膜的疾病的机制和预后。