Results 71 to 80 of about 833,358 (231)

红外分光法测定水中石油类

open access: yesGongye shui chuli, 2003
用多波长红外分光测油仪测定水中石油类,灵敏度高,所以测定结果准确,操作简单,方法线性好.文中测定了该方法的准确度及精密度.
杜坤泉, 黎小敏, 何良汉
doaj   +2 more sources

不同溶剂和抽提方法测定脂肪含量的比较

open access: yes, 2001
采用不同方法测定了鱼粉、豆饼、鱼油、豆油的脂肪含量。结果表明,不同测定方法测定的值显著不同,测定鱼粉和豆饼时,以氯仿-甲醇为溶剂抽提测得的脂肪含量高。测定鱼油和豆油时,氯仿 ...
杨云霞,解绶启,朱晓鸣,雷武,崔奕波
core  

细胞凋亡检测方法研究进展 [PDF]

open access: yes, 2007
细胞凋亡是生命科学目前的一个研究热点.检测细胞凋亡的方法和技术取得了很大的进步.从早期细胞内某些基因转录表达的变化、代谢生理的变化,到晚期细胞形态的确诊、细胞内代谢物质的转变,从定性、定量到原位定性定量等,都发展了相对成熟的检测技术.根据检测时间的早晚,从形态学、生化特性和分子调控等层次综合分析了检测细胞凋亡的主要方法 ...
张宏   +5 more
core  

Ultrasonic Vibration Assisted Laser Processing: A Hybrid Paradigm for Extreme Surface Enhancement

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Traditional laser processing techniques offer many advantages, but they often encounter limitations such as heat‐affected zones, recast layers, residual tensile stresses, and poor surface finish. The integration of ultrasonic vibration (UV) presents a promising hybrid approach to overcome these challenges by introducing beneficial effects like
Aziz Ul Hassan Mohsan   +6 more
wiley   +1 more source

1000~1900 K范围内TDLAS测高温标定方法设计及实验验证

open access: yes, 2020
针对航空发动机对燃烧尾焰温度测试的需求,开展基于吸收光谱原理的可调谐半导体激光器吸收光谱(TDLAS)测温系统研究。在实验室环境中采用辐射升温法创造高温气体恒温区,完成温度标定系统及标定流程设计。根据TDLAS测温系统1000~1900 K温度范围的温度标定,对比分析各个温度点标定过程中信噪比的变化过程,证实了标定方法的可行性。对标定过程中信噪比恶化提出修正措施。
刘德峰   +5 more
core  

高效液相色谱质谱法测定牛型胶原含量

open access: yes, 2020
建立了一种基于高效液相色谱-质谱联用技术并通过特征多肽进行牛Ⅰ型胶原含量检测的方法。胶原海绵样品经酶解处理后进行色谱分离,在电喷雾离子源正离子扫描及保留时间依赖的单离子监测模式(SIM)下测定,外标法定量。采用胰蛋白酶特异性酶解得到牛Ⅰ型胶原的1个特征多肽为GFSGLDGAK。该多肽在0.645 ~ 21.5 μg /mL质量浓度范围内线性关系良好(r~2 = 0.999 4);方法的定量下限为6.45 × 10 ~(- 4) μg / mL;在3.10、2.48、1.55 μg /mL 3个加标水平下,
张贵锋   +3 more
core   +1 more source

Regulating the Degradation and Cytocompatibility Behavior of Additively Manufactured Pure Zinc Through Post‐Processing Surface Treatments

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Zinc‐based biodegradable metals are promising implant materials, and additive manufacturing offers a powerful route for their patient‐specific fabrication. However, process‐induced surface defects can accelerate degradation and compromise biocompatibility, rendering post‐processing essential.
Yixuan Shi   +13 more
wiley   +1 more source

用计算机技术标定测力传感器

open access: yes, 1992
本文提出用计算机技术标定压电测力传感器的方法。提高了标定精度,方便可靠地得到传感器的动态和静态性能,迅速处理大量标定数据 ...
袁茂竹, 方新
core  

Laser‐Induced Graphene/AuNPs‐Gated OECT Biosensor for Sensitive Detection of PD‐L1‐Positive Exosomes Associated With Non‐Small Cell Lung Cancer

open access: yesRare Metals, Volume 45, Issue 10, October 2026.
ABSTRACT Lung cancer remains a major cause of cancer‐related mortality worldwide, and non‐small cell lung cancer (NSCLC) accounts for the largest proportion of diagnosed lung cancer cases. Exosomal programmed death‐ligand 1 (PD‐L1) has attracted increasing attention as a potential liquid‐biopsy biomarker associated with tumor immune regulation; however,
Chen Su   +6 more
wiley   +1 more source

一种土壤热参数自动测定装置

open access: yes, 2008
 本发明公开了一种土壤热参数自动测定装置,该装置包括土壤水平柱,该土壤水平柱的一端设有冷却室,冷却室上有进水口和出水口,在土壤水平柱的壁上均匀分布有测定温度的热电偶探针;供给器,供给器内装有冰水混合物,供给器连接有微型水泵,微型水泵通过导水管和土壤水平柱的冷却室上进水口连接;土壤水平柱的冷却室上的出水口也通过导水管与供给器连接;数据测量与自动采集单元,该数据测量与自动采集单元通过数据线与热电偶探针连接,自动采集土壤水平柱不同位置的温度变化过程,根据实测的温度变化,得到土壤热扩散率 ...
李 婷, 王全九, 樊 军
core  

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