Carbon dots, which are superior fluorescent nanomaterials with low photobleaching, low toxicity, excellent biocompatibility, and low environmental hazard, have presented exciting opportunities in many fields. However, a better strategy to synthesize fluorescent carbon dots with high quantum yield and further developing their potential applications is still needed. Herein, a one-step hydrothermal strategy was proposed to prepare carbon dots from egg white. The as-prepared CDs, with a diameter of 2.1 nm, were well-dispersed in aqueous solution and showed excellent pH stability. During the hydrothermal reaction, the carbonization, N-doping, and surface functionalization were realized at the same time. With a high quantum yield of 61%, the CDs were used as a probe for detecting metal ions and in living cell imaging. Additionally, multifunctional nanocomposites were also prepared with novel thermosensitive photoluminescent properties.

Highly Photoluminescent Carbon Dots Derived from Egg White: Facile and Green Synthesis, Photoluminescence Properties, and Multiple Applications

As a folk medicinal plant, Juglans mandshurica has been used for the treatment of cancer in China and Korea. Traditionally, J. mandshurica is decocted together with chicken eggs. Both the decoction and medicated eggs possess anti-tumor properties. Clarifying the constituents of the decoction and absorbed by the medicated eggs is essential for the investigation of the active principles of J. mandshurica. Herein, the medicated eggs were prepared by decocting raw chicken eggs, having unbroken shells, with the decoction of J. mandshurica. A systematic investigation of the chemical profile of the J. mandshurica decoction and the medicated egg extraction was conducted by HPLC-Q-TOF-MS2. In total, 93 peaks, including 45 tannins, 14 naphthalene derivatives, 17 organic acids, 3 diarylheptanoids, 4 lignans, 3 anthraquinones, 1 flavonoid glycoside, 3 amino acids, and 3 nitrogenous compounds, were tentatively identified in the decoction. In the medicated egg extraction, 44 peaks including 11 organic acids, 3 amino acids, 3 nitrogenous compounds, 8 naphthalene derivatives, 3 diarylheptanoids, 15 tannins, and 1 lignan were tentatively identified. The chemical profile presented provided a detailed overview of the polar chemical constituents in J. mandshurica and useful information for the research of bioactive compounds of this plant.

https://www.mdpi.com/1420-3049/22/9/1452/pdf

Identification of Polar Constituents in the Decoction of Juglans mandshurica and in the Medicated Egg Prepared with the Decoction by HPLC-Q-TOF MS2

Study on microwave hydrolysis for the analysis of amino acids in egg by high performance liquid chromatography

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Study on microwave hydrolysis for the analysis of amino acids in egg by high performance liquid chromatography