Insect-induced cecidomyiid galls deficient in light-harvesting protein complex II showing normal grana stacking

Meng-Yuan Huang,Chi-Ming Yang,Man-Miao Yang,Wann-Neng Jane,Yung-Ta Chang 한국응용곤충학회 2009 Journal of Asia-Pacific Entomology Vol.12 No.3

It has been postulated that grana stacking and destacking are mediated by the alteration of the surface charge density on the thylakoid membrane, which is regulated by the LHCII phosphorylation and dephosphorylation cycle. Insect-induced cecidomyiid galls, transformed from Machilus thunbergii Sieb & Zucc. (Lauraceae) leaves, are totally deficient in the pigment–protein complexes CPI and A1 of PSI and AB1 and AB2 of PSII. Although the galls are deficient in LHCII complex, grana stacking is normal. Our data suggest that the LHCII complex may not be the only factor responsible for grana stacking of thylakoid membranes.

The number of cecidomyiid insect galls affects the photosynthesis of Machilus thunbergii host leaves

Meng-Yuan Huang,Hsueh-Mei Chou,Yung-Ta Chang,Chi-Ming Yang 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.2

Previous studies of the impacts of galls on host leaf photosynthesis do not suggest any general trends, with a reportedrange of effects from negative to positive. In this study, photosynthetic characteristics such as chlorophyllfluorescence (Fv/Fm), photosynthetic capacity, and stomata conductancewere determined in two types of fruitlikegalls (red ovoid and green obovate galls) induced by Daphnephila taiwanensis and Daphnephila sueyenae, respectively,in order to investigate whether the number of galls affects the photosynthesis of galled leaves ofMachilus thunbergii. In 2008, chlorophyll fluorescence and photosynthetic capacity were negatively correlatedwith gall numbers, non-significantly and significantly, respectively,whereas stomata conductancewas positivelybut non-significantly correlated with gall numbers. In 2009, photosynthesis capacity and stomata conductancewere negatively, but non-significantly, correlated with gall numbers. Results imply that photosynthesis in M. thunbergii leaves is slightly affected by the number of cecidomyiid insect galls, and that the higher the gall number,the greater the negative effect that galls have on host leaf photosynthesis and subsequent infection.

Herbivorous insects alter the chlorophyll metabolism of galls on host plants

Meng-Yuan Huang,Wen-Dar Huang,Hsueh-Mei Chouc,Chang-Chang Chen,Yung-Ta Chang,Chi-Ming Yang 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.3

Five types of insect-induced galls derived from three host plant leaveswere analyzed for their carotenoid (Car), chlorophyll(Chl), and Chl biosynthesis porphyrins such as protoporphyrinogen IX (PPIX), magnesium protoporphyrin(MGPP) and protochlorophyllide (Pchlide), and Chl degradation intermediates including chlorophyllide (Chlide),pheophytin (Phe), pheophorbide (Pho), and phytylated and dephytylated pigments, and compared to ungalledportions of the same leaf. Galls contain significantly lower levels of Chl-related compounds (CRCs) than ungalledportions of host leaves. The mole percent of porphyrin and the ratios of Chlide/Phe and phytylated/dephytylatedpigments are both very different between galls and host leaves.We, therefore, conclude that leaf-derived gall is akind of non-leaf green tissue, that herbivorous insects alter gall Chl biosynthesis and degradation pathways, thatMg-chelatase, Mg-dechelatase, and chlorophyllase may be the major non-lethal enzymes in galls, and thatwhile ungalled host leaves take Chl → Phe → Pho and Chl → Chlide → Pho as the major and minor degradationroutes, respectively, all galls are in contrast with the host leaves.

Space Charge Behavior of Oil-paper Insulation Thermally Aged under Different Temperatures and Moistures

Yuan-Xiang Zhou,Meng Huang,Wei-Jiang Chen,Fu-Bao Jin 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.3

Moisture and high temperature are the most important factors that lead to the ageing of oil-paper insulation, but the research about space charge characteristics of oil-paper insulation does not take the combined effect of ambient temperature, moisture and thermal ageing into account. The pulsed electroacoustic (PEA) method was used to investigate the influence of moisture and temperature on space charge characteristics of oil paper at different ageing stages. The results showed that moisture could speed up formation of space charge in oil paper when water concentration was low, but the formation was restrained if the water concentration was high. At the beginning of thermal ageing, heterogeneous charge accumulation had predominance, but it gradually changed to homogeneous charge injection with ageing. It was believed that moisture concentration could speed up ageing and enhance charge accumulation on one hand, and accelerate or slow down the establishment speed of space charge on the other hand, therefore, charge accumulation type changed with ageing. The more seriously the oil-paper insulation was thermally aged, the deeper the trap energy level was, hence more space charge was trapped, which could be speeded up by increasing the ageing temperature, but the effect of ambient temperature did not fit the Arrhenius law.

Space Charge Behavior of Oil-paper Insulation Thermally Aged under Different Temperatures and Moistures

Zhou, Yuan-Xiang,Huang, Meng,Chen, Wei-Jiang,Jin, Fu-Bao The Korean Institute of Electrical Engineers 2015 Journal of Electrical Engineering & Technology Vol.10 No.3

Moisture and high temperature are the most important factors that lead to the ageing of oil-paper insulation, but the research about space charge characteristics of oil-paper insulation does not take the combined effect of ambient temperature, moisture and thermal ageing into account. The pulsed electroacoustic (PEA) method was used to investigate the influence of moisture and temperature on space charge characteristics of oil paper at different ageing stages. The results showed that moisture could speed up formation of space charge in oil paper when water concentration was low, but the formation was restrained if the water concentration was high. At the beginning of thermal ageing, heterogeneous charge accumulation had predominance, but it gradually changed to homogeneous charge injection with ageing. It was believed that moisture concentration could speed up ageing and enhance charge accumulation on one hand, and accelerate or slow down the establishment speed of space charge on the other hand, therefore, charge accumulation type changed with ageing. The more seriously the oil-paper insulation was thermally aged, the deeper the trap energy level was, hence more space charge was trapped, which could be speeded up by increasing the ageing temperature, but the effect of ambient temperature did not fit the Arrhenius law.

Anti-Inflammatory Activity of Epimedium brevicornu Maxim Ethanol Extract

Shan Huang,Ning Meng,Bingquan Chang,Xianghua Quan,RuiYing Yuan,Bin Li 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.7

Epimedium brevicornu Maxim has been used as a traditional herbal drug in China. In this study, the anti-inflammatory effects of E. brevicornu Maxim ethanol extract (EBME) were investigated in RAW264.7 macrophages and mice challenged with lipopolysaccharide (LPS). Results showed that EBME attenuated inflammation by decreasing the production of several proinflammatory mediators, such as nitric oxide (NO), prostaglandin (PG) E2, inducible nitric oxide synthase, and cyclooxygenase-2, in LPS-stimulated RAW264.7 macrophages. EBME increased the expression of heme oxygenase-1 (HO-1) and promoted the nuclear translocation of nuclear factor erythroid 2-related factor 2. The inhibitory effects of EBME on LPS-stimulated NO and PGE2 expression were partially reversed by HO-1 inhibitor. EBME also elicited an anti-inflammatory effect by inhibiting the production of tumor necrosis factor-α, interleukin (IL)-1β, and IL-6 in LPS-induced peritonitis. Therefore, EBME exhibited anti-inflammatory effects in vitro and in vivo.

Analysis of Altered Baseline Brain Activity in Drug-Naive Adult Patients with Social Anxiety Disorder Using Resting-State Functional MRI

Changjian Qiu,Yuan Feng,Yajing Meng,Wei Liao,Xiaoqi Huang,Su Lui,Chunyan Zhu,Huafu Chen,Qiyong Gong,Wei Zhang 대한신경정신의학회 2015 PSYCHIATRY INVESTIGATION Vol.12 No.3

ObjectiveaaWe hypothesize that the amplitude of low-frequency fluctuations (ALFF) is involved in the altered regional baseline brain function in social anxiety disorder (SAD). The aim of the study was to analyze the altered baseline brain activity in drug-naive adult patients with SAD. MethodsaaWe investigated spontaneous and baseline brain activities by obtaining the resting-state functional magnetic resonance imaging data of 20 drug-naïve adult SAD patients and 19 healthy controls. Voxels were used to analyze the ALFF values using one- and two-sample t-tests. A post-hoc correlation of clinical symptoms was also performed. ResultsaaOur findings show decreased ALFF in the bilateral insula, left medial superior frontal gyrus, left precuneus, left middle temporal gyrus, right middle temporal pole, and left fusiform gyrus of the SAD group. The SAD patients exhibited significantly increased ALFF in the right inferior temporal gyrus, right middle temporal gyrus, bilateral middle occipital gyrus, orbital superior frontal gyrus, right fusiform gyrus, right medial superior frontal gyrus, and left parahippocampal gyrus. Moreover, the Liebowitz Social Anxiety Scale results for the SAD patients were positively correlated with the mean Z values of the right middle occipital and right inferior occipital but showed a negative correlation with the mean Z values of the right superior temporal gyrus and right medial superior frontal gyrus. ConclusionaaThese results of the altered regional baseline brain function in SAD suggest that the regions with abnormal spontaneous activities are involved in the underlying pathophysiology of SAD patients.

Yeast Extract: Characteristics, Production, Applications and Future Perspectives

Tao Zekun,Yuan Haibo,Liu Meng,Liu Qian,Zhang Siyi,Liu Hongling,Jiang Yi,Huang Di,Wang Tengfei 한국미생물·생명공학회 2023 Journal of microbiology and biotechnology Vol.33 No.2

Yeast extract is a product prepared mainly from waste brewer’s yeast, which is rich in nucleotides, proteins, amino acids, sugars and a variety of trace elements, and has the advantages of low production cost and abundant supply of raw material. Consequently, yeast extracts are widely used in various fields as animal feed additives, food flavoring agents and additives, cosmetic supplements, and microbial fermentation media; however, their full potential has not yet been realized. To improve understanding of current research knowledge, this review summarizes the ingredients, production technology, and applications of yeast extracts, and discusses the relationship between their properties and applications. Developmental trends and future prospects of yeast extract are also previewed, with the aim of providing a theoretical basis for the development and expansion of future applications.

CNC Corner Milling Parameters Optimization Based on Variable-Fidelity Metamodel and Improved MOPSO Regarding Energy Consumption

Yang Yang,Yuan Wang,Qianfeng Liao,Jiongliang Pan,Junyu Meng,Hao Huang 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.4

In the corner milling process, processing energy consumption is a very important objective, since the energy efficiency of CNC machine is barely above 14.8%. Meanwhile, the excessive processing temperature will increase the thermal deformation of the product and leads to quality decline. Improper process parameters will lead to unnecessary high temperature and energy consumption. By optimizing the process parameters, the appropriate temperature and Specific Energy Consumption can be obtained. This study investigated into modeling Specific Energy Consumption and temperature in corner milling process using variable-fidelity metamodels. The adopted variable-fidelity metamodels are constructed by Hierarchical Kriging, in which 48 sets of low-fidelity data obtained from the AdvantEdge software simulation are used to reflect the trends of the metamodels, and 16 sets of high-precision data obtained from physical experiments are used to calibrate the trends. The experimental cost is reduced and the prediction accuracy is increased by making full use of both sets of data. An improved K-means Multi-objective Particle Swarm Optimization algorithm was adopted and applied on the multi-objective corner milling parameters optimization problem to find satisfactory specific energy consumption and temperature. The obtained Pareto solutions can provide guidance for selecting process parameters according to different requirements, such as reducing energy consumption or temperature.

Relationships of Low Serum Levels of Interleukin-10 With Poststroke Anxiety and Cognitive Impairment in Patients With Clinical Acute Stroke

Zhao-jian Ying,Yuan-Yuan Huang,Meng-Meng Shao,Chu-Huai Chi,Ming-Xia Jiang,Yi-Hui Chen,Yu-Chen,Miao-Xuan Sun,Yan-Yan Zhu,Xianmei Li 대한신경과학회 2023 Journal of Clinical Neurology Vol.19 No.3

Background and Purpose The relationships among interleukin (IL)-10 levels, anxiety, and cognitive status after stroke remain controversial. We aimed to determine the associations of serum IL-10 levels with poststroke anxiety (PSA) and poststroke cognitive impairment (PSCI). Methods We recruited 350 patients with stroke, of whom only 151 completed a 1-month follow- up assessment. The Mini Mental State Examination (MMSE) and Hamilton Anxiety Scale (HAMA) were used to assess the cognitive status and anxiety, respectively. Serum IL-10 levels were measured within 24 hours of admission. Results IL-10 levels were significantly lower in the PSA group than in the non-PSA group, and they were negatively associated with HAMA scores (r=-0.371, p<0.001). After adjusting for all potential confounders, IL-10 levels remained an independent predictor of PSA (odds ratio=0.471, 95% confidence interval=0.237–0.936, p=0.032). IL-10 levels were strongly correlated with behavior during interviews, psychic anxiety, and somatic anxiety. Patients without PSCI had higher IL-10 levels were higher in non-PSCI patients than in PSCI patients, and they were positively associated with MMSE scores in the bivariate correlation analysis (r=0.169, p=0.038), and also with memory capacity, naming ability, and copying capacity. However, IL-10 did not predict PSCI in the univariable or multivariable logistic regression. Conclusions Low IL-10 levels were associated with increased risks of PSA and PSCI at a 1-month follow-up after stroke. Serum IL-10 levels may therefore be helpful in predicting PSA.