Results 11 to 20 of about 1,260,379 (169)
Gongye shui chuli, 2006 将聚硅酸与聚合硫酸铁进行复合。采用正交实验法和单因素法探讨了聚硅酸中二氧化硅浓度、n(Si)∶n(Fe)、聚合硫酸铁的盐基度、水玻璃活化pH等条件对复合产品的稳定性和絮凝效果的影响。得出的复合条件为二氧化硅质量分数2%、n(Si)n∶(Fe)=12∶、聚合硫酸铁的盐基度在5%-15%、水玻璃活化pH为3.0。最后将复合混凝剂与商品聚合氯化铝(PAC)以及聚合硫酸铁进行比较，结果表明:该复合混凝剂的混凝效果完全达到了PAC的标准，然而其经济效益明显优于PAC；其混凝效果明显优于聚合硫酸铁。
杨玉萍, 马晓鸥
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Functional Ecology, Volume 40, Issue 7, Page 2068-2082, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Grasslands worldwide are experiencing severe degradation due to overgrazing, climate change and anthropogenic disturbances, resulting in substantial declines in biodiversity and ecosystem functioning.
Xiaoqi Wang +5 more
wiley +1 more source
Gaoya dianqi, 2016 检测变压器绝缘纸聚合度是判断其固体绝缘老化程度最直接有效的方法,实验室制取了53个不同聚合度的变压器绝缘纸样,采用国标法（粘度法）检测其聚合度。通过漫反射光谱仪对所有纸样进行扫描,结合偏最小二乘回归法建立了绝缘纸聚合度与光谱参数间的定量模型,模型相关系数为0.951 9,预测均方根误差RMSEP为67.5。该方法检测绝缘纸聚合度的精密度和准确度基本满足工程应用要求,为变压器固体绝缘状态提供了一种快捷、无损的检测方式。
蔡德华 +3 more
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Functional Ecology, Volume 40, Issue 7, Page 2128-2142, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
wiley +1 more source
Methods in Ecology and Evolution, Volume 17, Issue 7, Page 2123-2134, July 2026.Abstract Elliptic Fourier analysis (EFA) is often employed in geometric morphometrics (GM), but the normalization of elliptic Fourier descriptor (EFD) has persistently posed challenges for obtaining unique and comparable results, especially in the application of outline‐based GM methods, which limits the implementation in automated analysis of numerous,
Hui Wu +6 more
wiley +1 more source
Gongye shui chuli, 2004 以盐酸酸洗废液和废铁屑为原料，制备了聚硅酸聚合氯化铁复合型絮凝剂(PSPFC)，研究了聚铁中铁浓度、聚合硅酸浓度、聚合硅酸pH值、n(Fe)∶n(Si)及复合熟化时间等因素对絮凝性能的影响。正交试验结果表明，当制备条件为:Fe/Si物质的量比为1∶2，聚铁中铁浓度为0.6mol/L，复合熟化时间为40min时，研制的PSPFC对低浊污水(浊度10～20NTU)具有最佳处理效果，并具有较宽的pH适用范围。
贾青竹, 衣守志
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Atom Probe Tomography‐Based Analysis of Residual Trace Elements in Advanced Metallic Materials
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Residual trace elements inherited from raw materials strongly influence the mechanical and environmental performance of advanced metallic alloys and recycling materials due to preferable boundary/interface segregation and resultant embrittlement effects, yet their parts per million level concentrations pose significant challenges to ...
Congcong Li +17 more
wiley +1 more source
Gongye shui chuli, 2012 以L-天冬氨酸为原料,采用自制固体酸式催化剂TJ101,热缩聚合合成聚天冬氨酸(PASP),并研究了催化剂加入量和催化温度对PASP产率的影响,确定聚合反应的最佳条件:反应温度为200℃,催化剂与物料质量比为1∶10,聚合时间为6 h。探讨了固体酸式催化剂对产物颜色的影响,实验中发现,在固体酸式催化剂存在下合成聚天冬氨酸的色度较低,纯度较高。
张冰如, 胡伟, 李风亭
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT With high theoretical capacity and low cost, bismuth sulfide (Bi2S3) demonstrates considerable potential as an anode for sodium/potassium‐ion batteries (SIBs/PIBs). Unfortunately, significant volume variation, low electrical conductivity, and dissolution of polysulfides drastically weaken their intrinsic merits.
Fuyu Xiao +11 more
wiley +1 more source
Gongye shui chuli, 2012 通过测定聚合物驱含油污水中油珠、絮体及Zeta电位的大小,研究了污水油含量、固体悬浮物含量、聚合物浓度对油珠及悬浮物的亚微观聚集形态、表面电荷及污水稳定性的影响。结果表明,随聚合物浓度或油含量的增加,污水中的油珠、絮体均有变大的趋势;随固体悬浮物浓度的增加,污水中的油珠、絮体不仅有变大的趋势,且大尺寸的絮体数量显著增加。聚合物浓度对带电颗粒的Zeta电位有显著的影响,聚合物浓度越高,带电颗粒的Zeta电位绝对值越高。表明聚合物是聚合物驱采油污水处理低效的原因。
陈武 +5 more
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