Results 61 to 70 of about 122,509 (117)
, 1994 以显微照像技术考察了流动硬水体系中负溶解性盐ＣａＣＯ_３在紫铜、黄铜、铝、铸铁和聚四氟乙烯加热表面的沉积形态，发现在惰性表面的沉积为无定形体，在硬金属表面的沉积为规则的结晶体。以紫铜作实验试件，研究了溶液中Ｍｇ~（２＋）对ＣａＣＯ_３结垢的影响，结果表明适量Ｍｇ~（２＋）可明显抑制结垢生长，说明Ｍｇ~（２ ...
杨传芳，徐敦颀，沈自求
core
灵泉发电厂“三高”循环水防腐防垢剂水处理应用过程中的技术改进
Gongye shui chuli, 1998 通过对灵泉发电厂工业水水源变化特殊性的分析，经过多年的高硬度、高碱度、高pH值循环水防腐防垢水处理剂应用实践，针对凝汽器铜管中出现的等电位电化学腐蚀问题，从原方案本质出发，进行了继承性的研究论证，研制出了多元多功效、低成本的FL复合防腐防垢水处理剂，并在应用中获得了满意的效果。
范工业
doaj
Expert consensus on clinical management for early childhood caries. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2022 Zhang Q +9 more
europepmc +1 more source
[Technical specification and consensus on routine oral health examinations for adults]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiHealth Promotion Professional Committee of China Association for Promotion of Health Science and Technology +5 more
europepmc +1 more source
[A study on the correlation between oral health status and cognitive impairment in elderly population]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiXu L +5 more
europepmc +1 more source
[Latest Research Findings on the Mechanism of Periodontal Pathogens in Cardiovascular Disease]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue Ban, 2022 Wang ZK, Xu X, Zhou XD.
europepmc +1 more source
垃圾渗滤液浓缩用MVR 蒸发管内CaCO_3结垢过程数值分析
, 2016 基于圆管立式降膜蒸发传热传质的相关理论，建立了其管内CaCO3结垢过程的数学模型，并应用于垃圾渗滤液浓缩用机械蒸汽再压缩（MVR）立式降膜蒸发管内CaCO3结垢过程研究，得到了各结垢参数在不同结垢阶段的变化规律。结果表明：结垢初期，蒸发管内CaCO3的沉积速率远大于剥蚀速率，净存速率较大，污垢层厚度、污垢热阻快速增加，使得蒸发管总传热系数快速减小，进而引起蒸发器的蒸发量、浓缩比快速减小；结垢中期，CaCO3的净存速率变小，污垢增加变缓，各结垢参数变化趋势由急变缓；结垢末期，CaCO3的净存速率趋近于零 ...
杨承志 +4 more
core +1 more source
[Age-Related Changes in the Oral Microbiota]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanZhou J +8 more
europepmc +1 more source
[Effect of Pulsating Vacuum Cleaning Sterilizer on the Cleaning Quality of Dental Handpieces]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue Ban, 2023 Liu M, Xie W, Song S, Wang Y, Lu Z.
europepmc +1 more source