DC Electrolytic capacitors, it can be used on DC circuit only. its polarity is marked with "+" and "-" or "-" only, it is indicated on proper position or aside of lead wire/ terminal. 直流电解电容器只能使用在直流电路上,其极性必须标明在适当的位置或在导针/端子旁边。
The marked morphological differences during postnatal development were further confirmed by the dramatic increase of the amount of primary, secondary and terminal dendrites and spines. 在发育过程中,主树突、次级树突和末梢树突的数目不断增多,树突棘密度显著增高。
Eyeballs were selected separately, retinals digesting stretched preparation capillary samples were prepared, and apoptosis cells were specificity marked by PAS dyeing and ribonucleotide terminal transferase mediating dUTP nick-translation ( TUNEL method), to observe below light microscope. 分别按期摘取眼球,制备视网膜消化铺片微血管标本,PAS染色及核苷酸末端转移酶介导dUTP缺口翻译法(TUNEL法)特异性标记凋亡细胞,光镜下观察。