使用硬骨-软骨双染色技术,描述了刀鲚(Coilia nasus)仔稚鱼(体长范围为7.0～33.9 mm)脊柱及附肢骨骼的形态发育特征。骨骼形成的顺序依次为肩带,背鳍支鳍骨、臀鳍支鳍骨,脉弓,髓弓,尾下骨,椎体,腹鳍支鳍骨、尾上骨,背鳍前支鳍骨,肋骨。...使用硬骨-软骨双染色技术,描述了刀鲚(Coilia nasus)仔稚鱼(体长范围为7.0～33.9 mm)脊柱及附肢骨骼的形态发育特征。骨骼形成的顺序依次为肩带,背鳍支鳍骨、臀鳍支鳍骨,脉弓,髓弓,尾下骨,椎体,腹鳍支鳍骨、尾上骨,背鳍前支鳍骨,肋骨。胸鳍支鳍骨无后匙骨,左右乌喙软骨在腹面联合。侧尾下骨和第1尾下骨基部产生短暂的软骨质连接(20.1 mm SL)。第1、2尾上骨联合形成棒状尾上骨1+2。第1髓弓与脑颅之间区域具1游离髓弓。脊柱以体前中部位置为起点向前后发育。髓弓、脉弓的发育方式与鲱形目其他鱼类不同。脉弓首先以体中部为中心向前后发育;髓弓随后亦以从体中部向前后发育,12.4 mm SL个体开始同时从最前端向后发育。这一发育方式与鲱形目其他鱼类相比更接近高等鱼类。因此,刀鲚可能是进化过程中的过渡物种。展开更多
A low grade graphite ore from eastern India was beneficiated by flotation to improve its quality. The ore was composed of 87.80%ash and 8.59%fixed carbon. Primary coarse wet grinding （d80：186 μm） followed by rough...A low grade graphite ore from eastern India was beneficiated by flotation to improve its quality. The ore was composed of 87.80%ash and 8.59%fixed carbon. Primary coarse wet grinding （d80：186 μm） followed by rougher flotation in Denver flotation cell using diesel as collector and pine oil as frother yielded a rougher concentrate. Regrinding （d80：144 μm） of this rougher concentrate was opted for further libera-tion of graphite. It was followed by cleaning in laboratory flotation column. This combined process of relatively coarse primary grinding followed by regrinding and cleaning in flotation column resulted in final concentrate of 7.44% yield with 89.65% fixed carbon and 6.00% ash. This approach of two-stage grinding to recover the flake graphite at the coarsest possible grind can help to minimize grinding energy costs. A conceptual flow sheet which is cost effective was developed based on this methodology.展开更多
文摘使用硬骨-软骨双染色技术,描述了刀鲚(Coilia nasus)仔稚鱼(体长范围为7.0～33.9 mm)脊柱及附肢骨骼的形态发育特征。骨骼形成的顺序依次为肩带,背鳍支鳍骨、臀鳍支鳍骨,脉弓,髓弓,尾下骨,椎体,腹鳍支鳍骨、尾上骨,背鳍前支鳍骨,肋骨。胸鳍支鳍骨无后匙骨,左右乌喙软骨在腹面联合。侧尾下骨和第1尾下骨基部产生短暂的软骨质连接(20.1 mm SL)。第1、2尾上骨联合形成棒状尾上骨1+2。第1髓弓与脑颅之间区域具1游离髓弓。脊柱以体前中部位置为起点向前后发育。髓弓、脉弓的发育方式与鲱形目其他鱼类不同。脉弓首先以体中部为中心向前后发育;髓弓随后亦以从体中部向前后发育,12.4 mm SL个体开始同时从最前端向后发育。这一发育方式与鲱形目其他鱼类相比更接近高等鱼类。因此,刀鲚可能是进化过程中的过渡物种。
文摘A low grade graphite ore from eastern India was beneficiated by flotation to improve its quality. The ore was composed of 87.80%ash and 8.59%fixed carbon. Primary coarse wet grinding （d80：186 μm） followed by rougher flotation in Denver flotation cell using diesel as collector and pine oil as frother yielded a rougher concentrate. Regrinding （d80：144 μm） of this rougher concentrate was opted for further libera-tion of graphite. It was followed by cleaning in laboratory flotation column. This combined process of relatively coarse primary grinding followed by regrinding and cleaning in flotation column resulted in final concentrate of 7.44% yield with 89.65% fixed carbon and 6.00% ash. This approach of two-stage grinding to recover the flake graphite at the coarsest possible grind can help to minimize grinding energy costs. A conceptual flow sheet which is cost effective was developed based on this methodology.
