The diphenyl-thiocarbazone extraction and spectrophotometry were developed for indirect determination of residual chlorine in water distribution system.
By fuming with sulfuric-phosphoric acid mixture the residual hydrofluoride was then expelled,and boron was finally determined by curcumin spectrophotometry after distillation.
Objective To manage clinical study of transplantation of thoracic cavity of peduneulated greater omentum to cure major residual cavity chronic pyopneumothorax.
The types of deposits basically are differential metasomatism in the later magma, pneumatolytic hydrothermal process, pegmatite process, residual deposits and placer deposits.
A multi-period spatial residual Cokriging model combining Stochastic Hydrology with Geomathematics,was used to analysis hydrology data with spatial and temporal random function.
Bleaching earth filtration —Complete removal of the bleaching media from the bleached oil is very important since residual earths can act as a prooxidant.
Investigation was made of effect of preplastic deformation for unexplosive and explosive treatments on strength, surface residual stress and hydrogen embrittlement of the specimens.
Results A two-year follow-up revealed there occurred butment caries,luxated butment,and overlain residual root gingivitis,even on the rise,while the alveolar ridge showed no uneven absorption.
The residual stress formed on the surface of rolling bearing in superfinish hard turning will influence the fatigue life of rolling contacting after stress decay.