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- 저자 : Xiaobing Guo (검색결과 2 건)
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Hengheng Qiu,Xin Guo,Xiaorong Deng,Xiaobing Guo,Xiaoying Mao,Chengjian Xu,Jian Zhang 한국식품과학회 2020 Food Science and Biotechnology Vol.29 No.10
The purpose of this study was to investigate theendogenous cathepsin activity in each subcellular fractionand the effect of this activity on myofibrillar protein andtexture during refrigeration and partial freezing storage ofnorthern pike (Esox lucius) fillets. The results showed thatfillets stored under the refrigerated condition were moresusceptible to oxidation than partial freezing. Endogenouscathepsin activity indicated that partial freezing destroysthe integrity of lysosomes more effectively than refrigerationand inhibits the increase in cathepsin B and B ? L inlysosomes. The activity of cathepsin B and B ? L inlysosomes, mitochondria and myofibrils under the partialfreezing conditions was always lower than that underrefrigeration. Texture analysis showed that refrigerationhad a negative impact on hardness and springiness. Inconclusion, the cathepsin activity in each subcellularfraction was effectively inhibited and better textural characteristicswere obtained with partial freezing thanrefrigeration.
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Namkha Norbu,Yuegao Liu,Jinchao Li,Qunzi Jia,Wei Wang,Xiaobing Song,Yazhi Li,Huilei Kong,Yijie Gao,Xianzheng Guo,Xuegang Yao 한국지질과학협의회 2021 Geosciences Journal Vol.25 No.6
The East Kunlun orogenic belt (EKOB) is located in the northeastern part of the Qinghai-Tibetan Plateau, China. Voluminous Silurian–Devonian granitoids were formed during the Proto-Tethys Ocean subduction and collision process. In this study, zircon U-Pb age dating, in-situ Hf isotope analyses, and whole rock major and trace element analyses have been carried out on granitoids from the central to eastern EKOB. The formation ages of granodiorite in the Bairiqili area, the granodiorite in the Wulonggou area are 410 ± 2 Ma and 396 ± 1 Ma, respectively, and the granodiorites show I-type features. The Wulonggou syenogranite with a formation age of 398 ± 2 Ma has a high differentiation index (D.I. = 89.59–92.43), and may belong to the high fractionated I-type granite. The Lalangmai tonalite with a formation age of 423 ± 2 Ma has high Sr (339–590 μg/g), εHf(t) (1.5–7.3), and low Y (3.45–6.33 μg/g), which are similar to modern adakites. The Lalangmai tonalite is the latest adakite record during the Proto-Tethys evolution in EKOB. Combined with previous studies, it is concluded that the granitoids from Cambrian to Devonian divided into four episodes. The first episode (515–436 Ma) mainly consists of I-type island arc granites and adakite, which are formed in a subduction environment. The second episode (436–427 Ma) is characterized by the S-type granites related to the collision. The third episode (427–420 Ma) is the transition period between the collision and the post-collision environment. In the fourth episodes (420–385 Ma), granitoids were formed in post-collision extensional environment, which is characterized by I-type and A-type granites. The upwelling of asthenosphere material is likely caused by the collapse of the orogenic belt. After 420 Ma, I-type and A-type granites formed at different depths but in the same environment.
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