In this study, pine nut kernels from two grafted species: Pinus koraiensis (PK) and Pinus sylvestris var. (PKS) were roasted (130, 150, 180℃ for 10, 20, 30 min) to investigate the effect of roasting pre-treatment on chemical components, antioxidant activity, and oxidative stability of oils prepared from kernels. Increased temperature or time was found to cause a significant increase in oil yield, color, total phenolic content (TPC), carotenoid, and browning index (BI) of oils compared to unroasted samples. Roasting could also elevate the antioxidant activity and oxidative stability of pine nut oil. The levels of tocopherol decreased significantly at high temperatures (150℃, 180℃), while the fatty acid compositions were almost independent of roasting conditions. The FTIR spectra of oils from different roasted pine nuts showed minor variation in peak intensities. Therefore, roasting is a great option and critical step to improve the quality of pine nut oil. Novelty impact statementThe oil yield, color, total phenolic content (TPC), carotenoid, and browning index (BI) of pine nut oil from two grafted species were influenced by different roasting conditions.Roasting could improve the antioxidant activity and oxidative stability of pine nut oil.Roasting (180℃ for 10 min) is a great option to improve the quality of pine nut oil.

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Bo Fu received his Ph.D. degree from Tsinghua University in 2015. After two years of research at the University of Cambridge, he began his independent career as an associate research professor at Beihang University. He has authored and co-authored more than 60 peer-reviewed papers, such as in Advanced Optical Materials, Laser & Photonics Reviews, Advanced Functional Materials, and Small (ESI highly cited paper). His research interests include ultrafast photonics, laser optics, and nanophotonics.

Metal nanomaterials have promising applications in ultrafast photonics due to their broadband operation, large third-order nonlinear susceptibility, and ultrafast recovery time. We realized a Q-switched pulsed erbium-doped fiber laser based on a silver nanoplate polyvinyl alcohol film as a saturable absorber. This film, with a modulation depth of 15.7%, was integrated into a fiber laser by means of a sandwich structure. We obtained Q-switched pulses in the 1.5-μm band, which plays an important role in telecommunications and atmospheric detection. Stable Q-switched pulses were obtained at the pump power of 135 mW, with a single pulse energy of 33.8 nJ, a pulse width of 2.3 μs, a repetition rate of 62.4 kHz, and a signal-to-noise ratio of about 45 dB. When increasing the pump power up to a maximum value of 246 mW, the maximum single pulse energy of 57.8 nJ was achieved. This study first demonstrates the potential of silver nanoplates as saturable absorbers in generating stable laser pulses with high energy.

Superparamagnetic iron oxide nanoparticles (SPIO) are medical nanomaterials with the advantages of super-magnetic, surface modification and targetedness. At the same time, superparamagnetic iron oxide nanoparticles are beneficial for magnetic resonance imaging, but also can be combined with photodynamic therapy, photothermal therapy and magnetic heat therapy to treat tumors in the human body. Pancreatic cancer can be treated with superparamagnetic iron oxide nanoparticles. Pancreatic cancer is the "king of cancer" in the field of oncology, one of the worst malignant tumors in prognosis. Superparamagnetic iron oxide nanoparticles can properly solve the problem of low diagnosis and cure rate of pancreatic cancer. In this paper, the performance characteristics of SPIO and the application progress of SPIO in the diagnosis and treatment of pancreatic cancer are reviewed. In this paper, superparamagnetic iron oxide nanoparticles are studied by literature reference. While referring to relevant papers, the author also thinks and conceives. The main research directions are the preparation of SPIO, the advantages of targeted SPIO, the application of SPIO in magnetic resonance imaging, the principle of targeted drugs, and the principle of magnetic heat therapy for pancreatic cancer. The main results are as follows:1.Superparamagnetic iron oxide nanoparticles have many advantages, such as magnetic sensitivity, easy surface modification, targeting and high relaxation properties. 2. The preparation methods of SPIO are various, but the chemical coprecipitation method is widely used because of its simple operation, low cost and low requirements for the laboratory environment. 3. Active targeting SPIO is more effective in the diagnosis of pancreatic cancer. It can be used in magnetic resonance imaging to improve the clarity of imaging. 4. SPIO can be used to treat pancreatic cancer through targeted drugs and magnetic heat therapy.