concession period

From testing the properties of acrylate emulsion PSA in market,such as the initial adhesion,holding power,peeling strength and aging resistance,it concludes that the initial adhesion and holding power of aqueous acrylate PSA interact each other,and the holding power corresponds with cohesion.

通過對市場上常用乳液丙烯酸酯壓敏膠各方面性能的測試,如初黏力、持黏力、剝離強度及耐老化性,得出結論:水性丙烯酸壓敏膠的初黏與持黏是相互制約的,而持黏與內聚力是相對應的;采用交聯、加入增黏樹脂等方法可進一步提高初黏力及剝離強度,從而平衡膠水的各方面性能,但這是以降低膠水的內聚力為代價的;可以根據時溫等效原理來衡量膠水長時間后的老化效應;建立了合理的評價方法,為選擇合適類型的乳液丙烯酸酯壓敏膠供了參考。

Effect of Participants′ Contact Information on Cohort Retention among Injection Drug Users;

靜脈吸毒人群虛假聯系信息對隊列保持率影響的初步研究

The circuit design of data retention during power-down based on MAX6361;

基于MAX6361的掉電保持電路的設計

A Clinical Study and Application in Individualized Retention of Fixed and Removable Retainers;

正畸活動和固定保持器的臨床研究與個性化設計

Application of MapX and Mapinfo in decision-support system for flood control of the Yellow River in Shandong Province;

MapX和Mapinfo在山東黃河防汛決策支持系統中的應用

Discuss the supports with IT in the implementation of integrated curriculum;

淺議信息技術對綜合課程實施的支持作用

Copper Sorption and Desorption by Loess in Water-Sediment Systems;

高含沙水體中黃土吸持和釋放銅的機理

In situ immobilization of heavy metals by plant polyphenol in metal-contaminated soils:I. Effect on sorption and dissolution of copper;

植物多酚物質原位鈍化污染土壤重金屬的研究 I.對土壤Cu吸持與溶出的影響

In order to define potential risk of phosphorus loss,phosphorus sorption characteristics in soils under different land utilization were compared by evaluating phosphorus sorption isotherms.

研究結果表明,川西山地旱地土壤磷素水平較高,但其對磷的固定能力較差,標準需磷量最低,磷吸持飽和度和磷零吸持平衡濃度則高于其他土壤,這就決定了旱地土壤中的磷被淋溶或隨地表徑流流失的風險明顯高于其他土壤。

Maintenance approachs of complete male sterility in Brassica napus L.;

甘藍型油菜雄性不育完全保持的途徑

Establishment and maintenance of longan embryogenic cell lines;

龍眼胚性細胞系的建立與保持

The fostering,gestation and maintenance of sensitivity are a crucial task of editors in charge in their long work practice.

敏感性的培養、孕育與保持,是責任編輯長期工作實踐中的一項重要任務。