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Nutrient and ruminal fermentation profiles of Camellia seed residues with fungal pretreatment
Chunlei Yang,Zhongfa Chen,Yuelei Wu,Jia-Kun Wang 아세아·태평양축산학회 2019 Animal Bioscience Vol.32 No.3
Objective: The experiment was conducted to evaluate the effects of four fungal pretreatments on the nutritional value of Camellia seed residues, and to evaluate the feeding value of pre-treated Camellia seed residues for ruminants. Methods: Camellia seed residues were firstly fermented by four lignin degrading fungi, namely, Phanerochaete chrysosporium (P. chrysosporium)-30942, Trichoderma koningiopsis (T. koningiopsis)-2660, Trichoderma aspellum (T. aspellum)-2527, or T. aspellum-2627, under solid-state fermentation (SSF) conditions at six different incubation times. The nutritional value of each fermented Camellia seed residues was then analyzed. The fermentation profiles, organic matter degradability and metabolizable energy of each pre-treated Camellia seed residue were further evaluated using an in vitro rumen fermentation system. Results: After 5 days of fermentation, P. chrysosporium-30942 had higher degradation of lignin (20.51%), consumed less hemicellulose (4.02%), and the SSF efficiency reached 83.43%. T. koningiopsis-2660 degraded more lignin (21.54%) and consumed less cellulose (20.94%) and hemicellulose (2.51%), the SSF efficiency reached 127.93%. The maximum SSF efficiency was 58.18% for T. aspellum-2527 and 47.61% for T. aspellum-2627, appeared at 30 and 15 days respectively. All the fungal pretreatments significantly improved the crude protein content (p<0.05). The Camellia seed residues pretreated for 5 days were found to possess significantly increased organic matter degradability, volatile fatty acid production and metabolizable energy (p<0.05) after the treatment of either P. chrysosporium-30942, T. koningiopsis-2660 or T. aspellum-2527. The fungal pretreatments did not significantly change the rumen fermentation pattern of Camellia seed residues, with an unchanged ratio of acetate to propionate. Conclusion: The fungi showed excellent potential for the solid-state bioconversion of Camellia seed residues into digestible ruminant energy feed, and their shorter lignin degradation characteristics could reduce loss of the other available carbohydrates during SSF.
Non-linear magneto-optical properties in sputtered and epitaxial ultrathin films
Chunlei Gao,Qing-Yuan Jin,Bin Ma,Jun Ye,Yang Ren 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.44 No.32
The nonlinear magneto-optical properties of polycrystalline Co lms and single crystalline Fe lms epitaxially grown on Co(001) substrate are studied ex situ and in situ, respectively, by the magnetization-induced second harmonic generation (MSHG) technique. The magnetic contrast in MSHG intensity can be clearly distinguished for the cobalt lms, and dependence of the magnetic second harmonic intensity on the thickness of the magnetic lm and a nonmagnetic covering is found, which is the result of the combined contributions of the magnetic surface and interfaces. A giant nonlinear Kerr rotation of more than 2 degrees, being at least an order of magnitude larger than its linear one, is achieved for the polycrystalline Co lms. By using the MSHG method, the magnetic phase transitions of the ultrathin epitaxial Fe lms at a thickness of about 4 ML and 11 ML can be successfully observed, showing sensitivity to the lm structure and magnetic orders. If combined with the magneto-optical Kerr eect (MOKE), more information could be obtained.
Yang Weina,Kang Qian,Li Chunlei,Bo Shuchun,Wang Yue 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.3
Background During preeclampsia (PE), reactive oxygen species (ROS) production and infl ammation are increased. Matrine exerts diverse pharmacological eff ects, including anti-infl ammatory and anti-apoptotic eff ects. Objective The present study aimed to study the therapeutic eff ects of matrine on PE. Human trophoblasts (HTR-8/SVneo cells) were treated with H 2 O 2 to simulate oxidative stress, followed by treatment with various concentrations of matrine. Next, fl ow cytometry was used to examine apoptosis. Cell invasion and migration were examined by Transwell and scratch wound assays, respectively. The concentrations of IL-6, IL-8, and TNF-α were quantifi ed by enzyme-linked immunosorbent assays. The expression levels of miR-19a-3p and ZEB2 were quantifi ed by qRT-PCR. The interaction between miR-19a-3p and ZEB2 was examined by a dual-luciferase reporter assay. Result Matrine attenuated H 2 O 2 -induced increases in ROS levels, apoptosis, and cytokine release in HTR/SVneo cells. Matrine also increased cell migration and invasion during oxidative stress by reducing miR-19a-3p expression. Moreover, miR-19a-3p can target ZEB2 directly. Conclusion During oxidative stress, matrine can reduce ROS levels, apoptosis, and infl ammation in human trophoblasts and promote migration and invasion via miR-19a-3p, off ering a potential new approach for the treatment of PE.
Sirtuin 2 regulates cellular iron homeostasis via deacetylation of transcription factor NRF2
Yang, Xiaoyan,Park, Seong-Hoon,Chang, Hsiang-Chun,Shapiro, Jason S.,Vassilopoulos, Athanasios,Sawicki, Konrad T.,Chen, Chunlei,Shang, Meng,Burridge, Paul W.,Epting, Conrad L. American Society for Clinical Investigation 2017 The Journal of clinical investigation Vol.127 No.4
Robust Minimum Squared Error Classification Algorithm with Applications to Face Recognition
( Zhonghua Liu ),( Chunlei Yang ),( Jiexin Pu ),( Gang Liu ),( Sen Liu ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.1
Although the face almost always has an axisymmetric structure, it is generally not symmetrical image for the face image. However, the mirror image of the face image can reflect possible variation of the poses and illumination opposite to that of the original face image. A robust minimum squared error classification (RMSEC) algorithm is proposed in this paper. Concretely speaking, the original training samples and the mirror images of the original samples are taken to form a new training set, and the generated training set is used to perform the modified minimum sqreared error classification(MMSEC) algorithm. The extensive experiments show that the accuracy rate of the proposed RMSEC is greatly increased, and the the proposed RMSEC is not sensitive to the variations of the parameters.
Yao, Fei,Sun, Yang,Tan, Chunlei,Wei, Song,Zhang, Xiaojuan,Hu, Xiaoyun,Fan, Jun Korean Chemical Society 2011 대한화학회지 Vol.55 No.6
Using tetrabutyl titanate as precursor, $Eu^{3+}$ doped $TiO_2$ nano-powder was prepared by sol-gel method, the nature of luminescence of nano-powder was studied. The interaction of chlorpyrifos with $Eu^{3+}$ doped $TiO_2$ was studied by absorption and fluorescence spectroscopy. The results indicated the fluorescence intensity of $Eu^{3+}$ doped $TiO_2$ was quenched by chlorpyrifos and the quenching rate constant ($k_q$) was $1.24{\times}10^{11}\;L/mol{\cdot}s$ according to the Stern-Volmer equation. The dynamics of photoinduced electron transfer from chlorpyrifos to conduction band of $TiO_2$ nanoparticle was observed and the mechanism of electron transfer had been confirmed by the calculation of free energy change (${\Delta}G_{et}$) by applying Rehm-Weller equation as well as energy level diagram. A new rapid method for detection of chlorpyrifos was established according to the fluorescence intensity of $Eu^{3+}$ doped $TiO_2$ was proportional to chlorpyrifos concentration. The range of detection was $5.0{\times}10^{-10}-2.5{\times}10^{-7}mol/L$ and the election limit ($3{\sigma}$) was $3.2{\times}10^{-11}$ mol/L.
SNPs in the coding region of bovine MGAT2 gene are associated with body weight and weight gain
Lian Qu,Mingjuan Yang,Jinlong Zhu,Junxia Liu,Mijie Li,Liangzhi Zhang,Xianyong Lan,Chuzhao Lei,Chunlei Zhang,Hong Chen 한국유전학회 2011 Genes & Genomics Vol.33 No.3
Monoacylglycerol acyltransferase 2 (MGAT2), as a candidate gene for quantitative traits, relates to dietary fat uptake, lipids synthesis and storage, which plays a major role in the absorption of dietary fat by catalyzing the resynthesis of triacylglycerol in enterocytes. In this study, based on DNA pool sequencing and PCR‐RFLP methods, polymorphisms of the MGAT2 gene were detected in 1145 Chinese indigenous cattle. The results revealed two novel mutations located on exon 1and exon 5 (NM_001099136.1:m.84G>T and 756A>G). Hence, we described the HaeIII forced PCR–RFLP method in exon1 and a MluI PCR–RFLP method in exon5 to detect them. In addition, the associations of these polymorphisms with growth traits were evaluated in Nanyang cattle. The results showed that only HaeIII locus was associated with body weight and average daily gain aged 6 months, and individuals with genotype TT showed significantly higher body weight and average daily gain than those with genotype GG.
( Aihua Zhang ),( Shouyi Yang ),( Jianjun Li ),( Chunlei Li ),( Zhoufeng Liu ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.8
We investigate the channel state information (CSI) in multi-input multi-output (MIMO) cooperative networks that employ the amplify-and-forward transmission scheme. Least squares and expectation conditional maximization have been proposed in the system. However, neither of these two approaches takes advantage of channel sparsity, and they cause estimation performance loss. Unlike linear channel estimation methods, several compressed channel estimation methods are proposed in this study to exploit the sparsity of the MIMO cooperative channels based on the theory of compressed sensing. First, the channel estimation problem is formulated as a compressed sensing problem by using sparse decomposition theory. Second, the lower bound is derived for the estimation, and the MIMO relay channel is reconstructed via compressive sampling matching pursuit algorithms. Finally, based on this model, we propose a novel algorithm so called sparsity adaptive expectation maximization (SAEM) by using Kalman filter and expectation maximization algorithm so that it can exploit channel sparsity alternatively and also track the true support set of time-varying channel. Kalman filter is used to provide soft information of transmitted signals to the EM-based algorithm. Various numerical simulation results indicate that the proposed sparse channel estimation technique outperforms the previous estimation schemes.