Some inequalities for generalized eigenvalues of perturbation problems on Hermitian matrices

Hong, Yan,Lim, Dongkyu,Qi, Feng Springer International Publishing 2018 Journal of inequalities and applications Vol.2018 No.1

<P>In the paper, the authors establish some inequalities for generalized eigenvalues of perturbation problems on Hermitian matrices and modify shortcomings of some known inequalities for generalized eigenvalues in the related literature.</P>

Prolactin Inhibits BCL6 Expression in Breast Cancer Cells through a MicroRNA-339-5p-Dependent Pathway

Hong Yan,Min Zhao,Shan Huang,Ping Chen,Wen-yong Wu,Jin Huang,Zheng-sheng Wu,Qiang Wu 한국유방암학회 2016 Journal of breast cancer Vol.19 No.1

Purpose: Prolactin (PRL) plays a critical role in breast cancer progression by activating its cognate receptor and promotes the growth and differentiation of breast cancer cells. Studies have shown that B-cell lymphoma 6 (BCL6) is the target gene of microRNA- 339-5p (miR-339-5p) and that BCL6 expression contributes to breast cancer progression. Herein, we identified PRL as a potent suppressor of BCL6 expression in human breast cancer cells. Methods: Western blotting and quantitative reverse transcription-polymerase chain reaction were used to investigate molecular mechanisms underlying miR-339-5p expression and BCL6 manipulation in MCF-7, T47D, and SKBR3 breast cancer cells. Phenotypic changes in these breast cancer cell lines were assessed by performing cell viability (MTT), colony formation, migration, and invasion assays. Results: PRL suppressed BCL6 protein and mRNA expression and upregulated miR-339-5p expression in MCF-7 and T47D breast cancer cells. Selective downregulation of miR-339-5p expression significantly reversed PRL-induced suppression of BCL6 mRNA and protein expression. Exogenous PRL stimulation significantly decreased the proliferation, colony formation, migration, and invasion of breast cancer cells, and suppression of miR-339-5p expression reversed these processes in vitro. Conclusion: These results indicated that PRL inhibited BCL6 expression and regulated breast cancer progression through a miR-339-5p-dependent pathway.

A Molecular Dynamics Simulation Study of the Gibbs-Tolman-Koening-Buff Equation

Hong Yan,Haimei Sun,Xiaofang Zhou 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.67 No.5

The applicability of the Gibbs-Tolman-Koening-Buff (GTKB) equation has been a concern. A scheme is designed to test the GTKB equation. Molecular dynamics simulations are carried out for argon liquid of different systems containing different numbers of atoms with a Lennard-Jones (LJ) potential at a temperature of 78 K. The Tolman length and the surface tension are calculated. Based on the analysis, we conclude the GTKB equation is tenable for R s > 8.

APC‐EDFA‐based scintillation‐suppressed photodetection in satellite optical communication

Hong, Yan‐,Qing,Shin, Won‐,Ho,Han, Sang‐,Kook John Wiley Sons, Inc. 2019 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS Vol.61 No.10

<P><B>Abstract</B></P><P>This article proposes automatic power control (APC)‐erbium‐doped fiber amplifier (EDFA)‐based scintillation‐suppressed photodetection in satellite optical communication (SOC). It is mainly based on the dynamic gain characteristic of APC‐EDFA. In order to improve the performance, high pass filter (HPF) and Manchester on‐off‐keying (M‐OOK) are introduced as supplemental methods. The proposed scheme is evaluated experimentally under various turbulence channel strengths. The experimental results show that the scintillation effect is suppressed using APC‐EDFA with pump power reduction compared to gain saturation, and an approximate 5.83 dB signal‐to‐noise ratio improvement is obtained compared to adaptive threshold decision with instantaneous turbulence channel state information under a scintillation index of 0.2990.</P>

The influence of Trace TiO₂ on Adsorption of Ag+-imprinted Adsorbents Made from Chitosan and Mycelium

Hongyan Huo,Tianwei Tan,Haijia Su 한국생물공학회 2008 Biotechnology and Bioprocess Engineering Vol.13 No.1

The complex technology of molecular imprinting with a photocatalytic reaction introduces novel ways of treating industrial and living sewage. This paper deals with the effects of trace TiO2 on Ag+-imprinted or non-imprinted adsorbents. NanoTiO2 was added during the preparation of the adsorbents. The performance of these adsorbents was compared with other common adsorbents, such as activated carbon and chitosan. TiO2 loading improved the adsorption ability for Ag+ of adsorbents. Adsorption equilibrium could be rapidly achieved at an initial Ag+ concentration of 200 mg/L under different light conditions (UV, visible light, and dark). After TiO2 loading, the maximal adsorption capacity of Ag+-imprinted and non-imprinted adsorb-ents was 25.0% higher, at 155.0 and 134.3 mg/g, respectively, at the initial Ag+ concentration of 1,000 mg/L. In order to understand the binding state of Ag, Ti on the adsorbents surface, FTIR, XPS were measured. The FTIR analysis, before and after adding TiO2, indicated that TiO2 bound with adsorbents through hydrogen bonding. XPS analysis, before and after adsorption, indicated Ag+ was reduced to Ag0 on the adsorbent surface, leading to an increased adsorption of Ag+.

Variation Dynamic of Characters of Samaras Containing Gutta-Percha from Different Producing Areas Associated with Eucommia ulmoides

Hongyan Du,Fangdong Li,Lanying Du 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Thunderstorm Cloud Localization Algorithm and Performance Analysis of a Three‑Dimensional Atmospheric Electric Field Apparatus

Hongyan Xing,Xu Yang,Jinyu Zhang 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.6

In order to accurately obtain the location of thunderstorm cloud and improve the accuracy and stability of thunderstorm cloud localization, a thunderstorm cloud localization algorithm of a three-dimensional atmospheric electric feld apparatus is proposed. An electric feld measurement model is established, and the localization parameters are defned based on the model. According to the theory of mirror method, the potential distribution of the thunderstorm cloud at the atmospheric electric feld apparatus is obtained. Using the potential distribution formula, the three-dimensional electric feld components are derived and the thunderstorm cloud coordinates are obtained. The relationship between the electric feld component measurement error, the azimuth angle, the elevation angle and the ranging and direction-fnding accuracy is given, and the localization performance is analyzed. The results show that the method has a ranging error rate of about 5% and a directionfnding error rate of about 3%, which has a good localization efect.

Automatic bearing diagnosis based on improved empirical wavelet decomposition and nonparametric test

Hongyan Jiang,Keqin Zhao,Lifei Chen,Dianjun Fang,Feng Cheng,Yong Chen 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.12

The 1/3-binary tree structure bandwidth is fixed, while the bands containing fault information sometimes do not fall equally in the fixed structure. To solve this problem, it is proposed to utilize the power spectrum to replace the Fourier spectrum, and to reconstruct the signal based on the scale space representation for the empirical wavelet decomposition. The fluctuation characteristics of the power spectrum frequency components and the energy distribution within frequency bands are taken full advantage of in this method. A new size parameter updating mechanism is employed to accelerate the signal reconstruction process. At the same time, it is thought that fault frequency is affected by the factor of slippage phenomena in order to realize a self-running diagnosis of bearing failure, and the occurring probability of the bearing fault is introduced to transform the envelope spectrum into a scalar indicator. As a result, without human intervention, the whole failure diagnosis process of the rolling bearing can be achieved by the manner of nonparametric testing. Simulation signal analysis results and experimental analysis results demonstrate the effectiveness and superiority of the proposed method.

Antifreeze protein detection using Rhodamine B as photoluminescence label in porous silicon

Hongyan Zhang,Zhenhong Jia,Xiaoyi Lv,Junwei Hou,Xiaojing Liu,Ji Ma,Jun Zhou 한국물리학회 2013 Current Applied Physics Vol.13 No.4

A novel method is demonstrated to detect Antifreeze proteins (AFPs) based on photoluminescence (PL)using porous silicon (PS) coated with silver as a substrate. Ag/PS substrate is obtained through immersion of PS in silver nitrate (AgNO3) solutions and is incubated with Rhodamine B (RB) as PL label. This substrate is easy to be fabricated and the pore size of PS is large enough for biological molecules to infiltrate, which is an ideal platform for biological molecule detection. Through functionalization used glutaraldehyde (GTA) and 4-(N-Maleimidomethyl) cyclohexane-1-carboxylicacid (Sulfo-SMCC) as crosslinkers separately, we test the role of the AFPs antibodies in selective capturing the AFPs antigen and explain the reason of the enhancement of PL intensity. The result shows a significant enhancement of the PL intensity of RB at around 590 nm due to the interaction of antibodyeantigen competitive binding with AFPs. Therefore, the PL corresponding to RB was selected to detect the target AFPs and the PL intensity of RB proportional to the AFPs concentration. The detection limit was found to be 1.65 mg/ml for AFPs when GTA was used as cross-linker, and the detection limit was 16.5 ng/ml with Sulfo-SMCC as cross-linker

Foeniculum vulgare essential oil nanoemulsion inhibits Fusarium oxysporum causing Panax notoginseng root-rot disease

Hongyan Nie,Hongxin Liao,Jinrui Wen,Cuiqiong Ling,Liyan Zhang,Furong Xu,Xian Dong The Korean Society of Ginseng 2024 Journal of Ginseng Research Vol.48 No.2

Background: Fusarium oxysporum (F. oxysporum) is the primary pathogenic fungus that causes Panax notoginseng (P. notoginseng) root rot disease. To control the disease, safe and efficient antifungal pesticides must currently be developed. Methods: In this study, we prepared and characterized a nanoemulsion of Foeniculum vulgare essential oil (Ne-FvEO) using ultrasonic technology and evaluated its stability. Traditional Foeniculum vulgare essential oil (T-FvEO) was prepared simultaneously with 1/1000 Tween-80 and 20/1000 dimethyl sulfoxide (DMSO). The effects and inhibitory mechanism of Ne-FvEO and T-FvEO in F. oxysporum were investigated through combined transcriptome and metabolome analyses. Results: Results showed that the minimum inhibitory concentration (MIC) of Ne-FvEO decreased from 3.65 mg/mL to 0.35 mg/mL, and its bioavailability increased by 10-fold. The results of gas chromatography/mass spectrometry (GC/MS) showed that T-FvEO did not contain a high content of estragole compared to Foeniculum vulgare essential oil (FvEO) and Ne-FvEO. Combined metabolome and transcriptome analysis showed that both emulsions inhibited the growth and development of F. oxysporum through the synthesis of the cell wall and cell membrane, energy metabolism, and genetic information of F. oxysporum mycelium. Ne-FvEO also inhibited the expression of 2-oxoglutarate dehydrogenase and isocitrate dehydrogenase and reduced the content of 2-oxoglutarate, which inhibited the germination of spores. Conclusion: Our findings suggest that Ne-FvEO effectively inhibited the growth of F. oxysporum in P. notoginseng in vivo. The findings contribute to our comprehension of the antifungal mechanism of essential oils (EOs) and lay the groundwork for the creation of plant-derived antifungal medicines.