Hydroxypyridinium Crosslinks HPLC Column
The Hydroxypyridinium Crosslinks HPLC Column is For Research Use Only
Each column is can be utilized for approximately 500-1000 samples depending on column care and sample type.
Assay Background
Pyridinium and deoxypyridinium are built as intramolecular crosslinkers during the maturation of collagen. During bone resorption collagen is degraded and the pyridinium-crosslinks are excreted. They are not re-utilized by the body and excreted in the urine. The crosslinks are not released during the de novo synthesis of collagen. They are specific for resorptive processes. Neither PYD nor DPD are taken up by nutrition. Therefore the determination of the crosslinks is independent from the diet. PYD is found in cartilage, ligaments and bone, whereas DPD is rather specific for bone.
The crosslink excretion shows a strong circadian rhythm with a maximum in the early morning hours. Reliable data can be obtained with a 24h or a creatinine corrected morning urine. An elevated crosslink excretion is shown in osteoporotic women. Crosslink levels decrease during treatment with estrogen (Seibel et al. 1994). Therefore they are suited for therapy monitoring (Ganero et al. 1994). The measurement of pyridinium crosslinks is an independent predictor for future bone fractures (Ganero et al. 1995). Increased crosslink concentrations are also described in patients with Paget’s disease, primary hyperparathyroidism and bone metastasis.
Hydroxypyridinium Crosslinks HPLC Assay kit application for the pyridinium crosslinks makes it possible to determine pyridinium and deoxypyridinium in an easy, fast and precise method. The Hydroxypyridinium Crosslinks HPLC Assay kit includes all reagents in a ready to use form for preparation and separation of the samples with exception of the columns (IC3201rp) and the controls (IC3201ko). Both can be supplied separately by Eagle Biosciences. Beside the complete test kits it is possible to order all components separately. Please request our single component price list.
Related Products
Hydroxypyridinium Crosslinks HPLC Assay
Hydroxypyridinium Crosslinks HPLC Control Set
Ubiquinone Coenzyme Q10 HPLC Column
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能不能用kappa检验，我看了论坛上的帖子，好像是不行的。但是看到一篇文章，计数资料却用了kappa检验，请问能否这样使用，如果能的话，应该用什么软件，怎么计算。谢谢
提到的文章见后
文章.rar(267.87k)
如何用IPP软件测量肌纤维的直径？求战友教教，带图的那种。另外如何给特定的细胞计数？
缺点是人工计数可能发生的随机误差较大。
频率，是单位时间内完成周期性变化的次数，是描述周期运动频繁程度的量，常用符号f或ν表示，单位为秒分之一，符号为s。为了纪念德国物理学家赫兹的贡献，人们把频率的单位命名为赫兹，简称"赫"，符号为Hz。每个物体都有由它本身性质决定的与振幅无关的频率，叫做固有频率。频率概念不仅在力学、声学中应用，在电磁学、光学与无线电技术中也常使用。
