Solid-phase extraction has several advantages over liquid/liquid extraction for extractables and leachables studies. rui vale sousa/shutterstock.com An extractable/leachable (E/L) study is routinely ...

Most processes and structures in nature follow the principle of “minimum inventory/maximum diversity” (Ref. 1). The diversity of natural forms is even more astonishing if we consider their ...

The Annals of Statistics, Vol. 36, No. 6, High Dimensional Inference and Random Matrices (Dec., 2008), pp. 2791-2817 (27 pages) Principal component analysis (PCA) is a standard tool for dimensional ...

“Hello, I am the AI assistant from Bairong Yunchuang. Don’t I look cool? How can I assist you?” At the 2025 World Intelligent ...

Researchers from the University Children's Hospital in Erlangen, near Nuernberg, Germany, are using the API 4000™ LC/MS/MS System from Applied Biosystems to master the problems associated with steroid ...

For research papers, literature reviews, or longer essays, a concept matrix can be an effective resource in organizing research. A concept matrix is an organizational tool that presents connections ...

Let $\{X_{ij}\}$, i, j =..., be a double array of i.i.d. complex random variables with EX₁₁ = 0, E|X₁₁|² = 1 and E|X₁₁|⁴ < ∞, and let $A_{n}=\frac{1 ...