Insecticidal activities and biochemical properties of Pinellia ternata extracts against the beet armyworm Spodoptera exigua

Ya-Nan Zhang,Peng He,Jian-Ping Xue,Qing Guo,Xiu-Yun Zhu,Li-Ping Fang,Jin-Bu Li 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.2

The beet armyworm, Spodoptera exigua Hübner (Lepidoptera: Noctuidae), is a key pest of various agricultural crops in many countries throughout the world. The pest requires extensive use of pesticides and field-evolved resistances to conventional insecticides in China and other countries. Pinellia ternata Breit is native to the eastern part of Asia and foundmainly in China,which has been used in traditional Chinese medicines for N1000 years, but few studies have focused on the insecticidal activity of the P. ternate. In order to find natural products that could be used to control the pest in an safe, efficient and ecofriendlymanner,we first time analyzed the components of the anhydrous ethanolic extracts fromthe tubers of Pinellia ternate by using GC–MS method, and then investigated the insecticidal activities and biochemical mechanisms of the extracts against S. exigua. The result of GC–MS showed that 2-Methoxy-4-vinylphenolmay be an insecticidal active component, and we also found the extracts had notable insecticidal activity and disturbed the regular metabolismof S. exiguamainly through altering the activities of detoxification enzymes, digestive enzymes and protective enzymes. These properties suggest that the anhydrous ethanolic extracts from P. ternate can serve as a potential, efficient and ecofriendly S. exigua-control biopesticide.

PREPARATION OF CISPLATIN COMPOSITE MICRO/NANOFIBERS AND ANTITUMOR ACTIVITY IN VITRO AGAINST HUMAN TUMOR spc-a-1 CELLS

PING CHEN,QING-SHENG WU,YA-PING DING,ZI-CHUN ZHU 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2011 NANO Vol.6 No.4

In this paper, the cisplatin composite micro/nanofibers were prepared by electrospinning. Average diameter of the typical products was about 700 nm, and cisplatins were incorporated in biodegradable poly (L-lactic acid) fibers. The controlled release of cisplatin can be gained for long time. The possible mechanisms of cisplatin release in the PBS and the PBS with proteinase K were discussed. 3-(4, 5)-dimethylthiahiazo-(-z-y1)-3, 5-di-phenytetrazoliumromide (MTT) method was used to test antitumor activities in vitro against human lung tumor spc-a-1 cells. When incubation time was 24 h, the same content of cisplatin from virgin cisplatin and the composite fibers has almost equal antitumor activity in vitro. However, when incubation time was 48 h, the composite fibers show much higher antitumor activity than the virgin cisplatin. The system may be useful in the postoperative local chemotherapy and have clinical applications as an implantable drug for tumor in the future.

Circulating Low Absolute CD4+ T Cell Counts May Predict Poor Prognosis in Extranodal NK/T-Cell Lymphoma Patients Treating with Pegaspargase-Based Chemotherapy

Ya-Ping Zhang,Run Zhang,Hua-Yuan Zhu,Li Wang,Yu-Jie Wu,Jin-Hua Liang,Wen-Yu Shi,Hong Liu,Wei Xu,Jian-Yong Li 대한암학회 2019 Cancer Research and Treatment Vol.51 No.1

Purpose Extranodal natural killer/T-cell lymphoma, nasal type (ENKTL) is a rare subtype of non- Hodgkin lymphoma, and asparaginase-based regimens are the best first-line treatments. Data on the role of specific circulating lymphocyte subsets in the progression of ENKTL are limited. The aim of this study was to investigate the clinical correlation and distribution of circulating absolute CD4+ T-cell counts (ACD4Cs) in ENKTL. Materials and Methods We retrospectively searched medical records for 70 newly diagnosed ENKTL patients treated with pegaspargase-based regimens. Comparison of ACD4Cs as a continuous parameter in different groups was calculated. Univariate and multivariate analyses were used to assess prognostic factors for overall survival (OS) and progression-free survival (PFS). Results Stage III/IV, B symptoms, elevated lactate dehydrogenase, monocytopenia, high-intermediate and high risk International Prognostic Index (IPI) and Korean Prognostic Index (KPI), high risk Prognostic Index of Natural Killer Lymphoma (PINK), and lower lymphocytes were significantly associated with low ACD4C at diagnosis. With a median follow-up time of 32 months, patients who had an ACD4C < 0.30109/L had a worse OS. Median OS was 11 months and median PFS was 5 months in the low ACD4C cohort. There were significant differences in both OS and PFS between the two cohorts. Moreover, multivariate Cox analysis identified ACD4Cs as an independent predictor for OS and PFS. Conclusion Low ACD4Cs were associated with poorer survival and could act as a negative predictor for ENKTL patients treated with asparaginase-based regimens.

Ni/La2O3-ZrO2 catalyst for hydrogen production from steam reforming of acetic acid as a model compound of bio-oil

Ya-ping Xue,Chang-feng Yan,Xiao-yong Zhao,Shi-lin Huang,Chang-qing Guo 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.2

Hydrogen production from steam reforming of acetic acid was investigated over Ni/La2O3-ZrO2 catalyst. A series of Ni/La2O3-ZrO2 catalysts were synthesized by sol-gel method coupled with wet impregnation, which was characterized by XRD, BET, TEM, EDS, TG, SEM and TPR. Catalytic activity of Ni/La2O3-ZrO2 was evaluated by steam reforming of acetic acid at the temperature range of 550-750 oC. The tetragonal phase La0.1Zr0.9O1.95 is formed through the doping of La2O3 into the ZrO2 lattice and nickel species are highly dispersed on the support with high specific surface area. H2 yield and CO2 yield of Ni/La2O3-ZrO2 catalyst with 15%wt Ni reaches 89.27% and 80.41% at 600 oC, respectively, which is attributed to high BET surface area and sufficient Ni active sites in strong interaction with the support. 15%wt Ni supported on La2O3-ZrO2 catalyst maintains relatively stable catalytic activities for a period of 20 h.

Antioxidant and Anti-hyperglycemic Activity of Polysaccharide Isolated from Dendrobium chrysotoxum Lindl

( Ya Ping Zhao ),( Young Ok Son ),( So Soon Kim ),( Yong Suk Jang ),( Jeong Chae Lee ) 생화학분자생물학회 2007 BMB Reports Vol.40 No.5

Influence of the Incorporation of Aluminum on the Optical Properties of MCM-41

Ya-Ping Hsieh,Yang-Fang Chen,Ai-Qin Wang,Chi-Te Liang,Chung-Yuan Mou,Ji-Wei Chen 한국물리학회 2007 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.50 No.6

Different ratios of aluminum were incorporated into MCM-41. PL measurements revealed a blue shift and an enhancement in intensity by 2 orders of magnitude as the Si : Al ratio was decreased to 14. By comparing the PL and the photoluminescence excitation (PLE) spectra of aluminosilicate MCM-41 to silica MCM-41 and to published reports on similar materials, we are able to identify the origin of the photoluminescence enhancement.

Application of Bacteriostatic Agents in Tea Transgene

Ya-Ping Yang,Yue-Rong Liang,Xin-Qiang Zheng 한국차학회 2015 한국차학회지 Vol.- No.S

Agrobacteria, generally existing in the soil, is a kind of gram-negative bacteria, including Agrobacterium tumefaciems and Agrobaterium rhizogenes. It is necessary to use bacteriostatic agents to eliminate the Agrobacterium after co-cultivation in Agrobacterium-mediated method. Bacteriostatic agents probably changed the composition of culture media and affecte the regeneration of the tissues, which would reduce transformation efficiency. Therefore, it is very important to choose suitable antibiotics. This paper reviewed the application of bacteriostatic agents in plants genetic transformation to provide a reference for tea transgene. Timentin might be an alternative antibiotic in plant transformation, especially for tea.

A combined spline chirplet transform and local maximum synchrosqueezing technique for structural instantaneous frequency identification

Ping-Ping Yuan,Zhou-Jie Zhao,Ya Liu,Zhong-Xiang Shen 국제구조공학회 2024 Smart Structures and Systems, An International Jou Vol.33 No.3

Spline chirplet transform and local maximum synchrosqueezing are introduced to present a novel structural instantaneous frequency (IF) identification method named local maximum synchrosqueezing spline chirplet transform (LMSSSCT). Namely spline chirplet transform (SCT), a transform is firstly introduced based on classic chirplet transform and spline interpolated kernel function. Applying SCT in association with local maximum synchrosqueezing, the LMSSSCT is then proposed. The index of accuracy and Rényi entropy show that LMSSSCT outperforms the other time-frequency analysis (TFA) methods in processing analytical signals, especially in the presence of noise. Numerical examples of a Duffing nonlinear system with single degree of freedom and a two-layer shear frame structure with time-varying stiffness are used to verify the effectiveness of structural IF identification. Moreover, a nonlinear supported beam structure test is conducted and the LMSSSCT is utilized for structural IF identification. Numerical simulation and experimental results demonstrate that the presented LMSSSCT can effectively identify the IFs of nonlinear structures and time-varying structures with good accuracy and stability.

중국 주식시장의 모멘텀 효과 검증

왕아평 ( Ya Ping Wang ),하연정 ( Yeon Jeong Ha ) 국제지역학회 2015 국제지역연구 Vol.19 No.3

본 연구는 중국 주식시장의 장기적인 자료를 이용하여 중국 시장의 모멘텀 효과를 검증하였다. Jegadeesh and Titman(1993) 등 많은 연구는 미국 주식시장의 모멘텀 효과가 존재함을 보였지만, Chui et al.(2010)은 이러한 모멘텀 효과가 아시아 국가에서는 존재하지 않음을 보였다. 이에 본 연구는 중국 주식시장의 거래소별, 기간별, 월별, 규모별로 나누고, 다양한 포트폴리오 구성 기간을 이용하여 모멘텀 효과를 검증하였다. 분석 결과는 다음과 같다. 첫째, 규모가 작은 주식이 거래되는 심천 거래소에서 모멘텀 효과가 존재하였다. 둘째, 2007년 이전 기간에는 모멘텀 효과가 전혀 존재하지 않았지만, 2008년 이후 모멘텀 효과가 약하게 발생하기 시작하였다. 셋째, 규모를 고려하여 재검증한 결과, 2008년 이후 규모가 작은 주식을 대상으로 모멘텀 효과가 존재함을 보여, 최근 중국 시장에서 모멘텀 효과가 바뀌었음을 확인하였다. 본 연구는 최근 중국 주식시장의 변화가 모멘텀 효과에 영향을 미쳤음을 보여주었다는 데에 의미를 가진다. A number of studies starting with Jegadeesh and Titman (1993) clarify the momentum effect in United States. However, Chui et al. (2010) find that momentum effect disappears in Asia countries. This paper revisits the momentum effect in Chinese stock markets using a long historical return data. The results are as follows. First, we find the momentum effect in the Shenzhen Stock Exchange that trades small firm`s stocks. Second, from 1991 to 2007, we fail to find the momentum effect, but since 2008, we find the effect. Last, when we consider the firm size to examine the momentum effect, the effect exists only in small firms since 2008. So, we conclude that the momentum effect is present in Chinese stock markets recently.

An Empirical Analysis of the Influence of FDI on the Differences of Regional Economic Growth in China

Lv Ya-ping,Song Jaehoon 한국전문경영인학회 2018 한국전문경영인학회 학술대회 발표논문집 Vol.2018 No.10

본 논문에서는 Cobb-Dauglas 생산함수를 이론적 모형으로 사용하여 1998 년부터 2016 년까지 중국의 30개 성 및 도시에서 패널 데이터를 사용하여 외국인 직접 투자, 국내 투자, 인적 자본 및 중국 경제 성장 간의 관계를 연구했다. 그 결과 중국의 동부, 중부 및 서부 지역의 경제 성장을 촉진하는 데 중요한 역할을 하는 국내 투자와 인적 자본 및 중국 경제 성장 간에는 상당한 상관 관계가 있음을 보여주었다. 그러나 중국의 지역 경제 발전에 대한 외국인 직접 투자의 영향에는 상당한 차이가 있음을 발견하였다. FDI는 중국 서부 지역의 경제 성장에 가장 큰 영향을 미쳤고 동부 지역 다음으로 중부 지역에서의 국내 투자에 대한 “구축효과”가 있었다. In this paper, we adopted the cobb-dauglas production function as the theoretical model to study the relationship of foreign direct investment, domestic investment , human capital and China's economic growth by using the panel data from 1998 to 2016 in 30 provinces and cities of China. The results show that there is a significant correlation between domestic investment and China's economic growth, which plays a significant role in promoting economic growth in eastern, central and western China .Human capital also plays a catalytic role in the economic growth effects of FDI. However, there are significant differences in the impact of FDI on China's regional economic development. FDI plays the most significant role in promoting economic growth in western China, followed by eastern regions, while domestic investment in central regions has a certain “crowding out effect”.