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Search Results: 1 - 10 of 78120 matches for " Xiaoya Chen "
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Are small RNAs a big help to plants?
YingBo Mao,XueYi Xue,XiaoYa Chen
Science China Life Sciences , 2009, DOI: 10.1007/s11427-009-0034-3
Abstract: The discovery of RNA interference (RNAi) has augmented our knowledge of gene regulation and presents a fascinating technology that has a great potential for application in genetic analysis, disease therapy, plant protection, and many other areas. In this review, we will focus on the biological functions of RNAi and its application in agriculture with a brief introduction to the history of its discovery and molecular mechanism.
Are small RNAs a big help to plants?

YingBo Mao,XueYi Xue,XiaoYa Chen,

中国科学C辑(英文版) , 2009,
Abstract: The discovery of RNA interference (RNAi) has augmented our knowledge of gene regulation and presents a fascinating technology that has a great potential for application in genetic analysis, disease therapy, plant protection, and many other areas. In this review, we will focus on the biological functions of RNAi and its application in agriculture with a brief introduction to the history of its discovery and molecular mechanism. Supported by National Natural Sciences of China (Grant No. 30630008) and National Key Basic Research and Development Program of China (Grant No. 2007CB108800).
Risk Factors for Chemotherapy-Induced Leukopenia in Patients with Lung Cancer  [PDF]
Hongyan Jin, Xiaoya Chen, Wei He, Qian Liu, Zexiong Wei, Jinjun Li
International Journal of Clinical Medicine (IJCM) , 2016, DOI: 10.4236/ijcm.2016.73023
Abstract: Objective: This analysis was conducted to clarify risk factors for chemotherapy-induced leukopenia (CIL) in lung cancer. Methods: A retrospective study was conducted on data from 358 patients with lung cancer who received chemotherapy. Results: Among 358 cases of lung cancer who received chemotherapy, a total of 240 patients experienced CIL, rate was 67%. The demographic data including gender (P = 0.795), age (P = 0.134), presence of selected chronic comorbidities (P = 0.23) were not significantly different in the two groups. The weight loss rate, PS score, sub-normal pre-WBC level, sub-normal pre-PLT level, and the cycle of chemotherapy were significantly different between the groups (P < 0.05). Multivariate analysis revealed that the weight loss rate ≥5% (OR = 0.503), sub-normal pre-WBC level (OR = 11.807), the cycle of chemotherapy ≥3 (OR = 3.100) were main risk factors for CIL in lung cancer. Conclusion: Before treatment, weight loss rate is 5% or higher, chemotherapy has a cycle of 3 or more and sub-normal WBC level is independent risk factor of lung cancer after chemotherapy-induced leucopenia.
A Summary of the Research Reviews of East Asia Tongwen Academy of Japan  [PDF]
Xiaoya Zhang, Yaru Liu
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.612005
Abstract: East Asia Tongwen Academy was the largest and oldest institute of culture & education opened in foreign countries in the Modern history of Japan, and many scholars have done researches into this special school. This paper summaries most of the scholars’ study achievements so far obtainable, which are classified into three types, namely, comprehensive studies, studies of the graduation expedition and other special topic studies. Based on the researches, the author points out three issues that could be further researched into: 1) The real nature of the academy; 2) The historical study of China in modern times; and 3) Japan’s tradition of learning from foreign cultures.
Effect of Hemoglobin Adsorption on Apparent Capacitance Density of Platinum Disk Nanoelectrode
Chengyin Wang, Yujing Chen, Xiaoya Hu*, Rong Guo
International Journal of Electrochemical Science , 2006,
Abstract: A platinum disk nanoelectrode was prepared by sealing a platinum wire etched electrochemically in epoxy resin. Its apparent capacitance density (ACD) increased exponentially with its decreasing geometrical area. The adsorption of hemoglobin molecules on the nanoelectrode resulted in the decrease of its effective area, leading to a significant change of its apparent capacitance. The hemoglobin molecules adsorbed could be estimated according to the dimension of single hemoglobin molecule. Thus, a new electrochemical method for highly sensitive sensing of some electroinactive molecules could further be developed.
pH-Sensitive Micelles Based on Double-Hydrophilic Poly(methylacrylic acid)-Poly(ethylene glycol)-Poly(methylacrylic acid) Triblock Copolymer
Tao Youhua,Liu Ren,Liu Xiaoya,Chen Mingqing
Nanoscale Research Letters , 2009,
Abstract: pH-sensitive micelles with hydrophilic core and hydrophilic corona were fabricated by self-assembling of triblock copolymer of poly(methylacrylic acid)-poly(ethylene glycol)-poly(methylacrylic acid) at lower solution pH. Transmission electron microscopy and laser light scattering studies showed micelles were in nano-scale with narrow size distribution. Solution pH value and the micelles concentration strongly influenced the hydrodynamic radius of the spherical micelles (48–310 nm). A possible mechanism for the formation of micelles was proposed. The obtained polymeric micelle should be useful for biomedical materials such as carrier of hydrophilic drug.
Selective adsorption of silver ions from aqueous solution using polystyrene-supported trimercaptotriazine resin
Shiming Wang,Hongling Li,Xiaoya Chen,Min Yang,Yanxing Qi,
Shiming Wang
,Hongling Li,Xiaoya Chen,Min Yang,Yanxing Qi

环境科学学报(英文版) , 2012,
Abstract: Trimercaptotriazine-functionalized polystyrene chelating resin was prepared and employed for the adsorption of Ag(I) from aqueous solution. The adsorbent was characterized according to the following techniques: Fourier transform infrared spectroscopy, elemental analysis, scanning electron microscopy and the Brunauer-Emmet-Teller method. The effects of initial Ag(I) concentration, contact time, solution pH and coexisting ions on the adsorption capacity of Ag(I) were systematically investigated. The maximum adsorption capacity of Ag(I) was up to 187.1 mg/g resin at pH 0.0 and room temperature. The kinetic experiments indicated that the adsorption rate of Ag(I) onto the chelating resin was quite fast in the first 60 min and reached adsorption equilibrium after 360 min. The adsorption process can be well described by the pseudo second-order kinetic model and the equilibrium adsorption isotherm was closely fitted by the Langmuir model. Moreover, the chelating resin could selectively adsorb more Ag(I) ions than other heavy metal ions including: Cu(II), Zn(II), Ni(II), Pb(II) and Cr(III) during competitive adsorption in the binary metal species systems, which indicated that it was a highly selective adsorbent of Ag(I) from aqueous solution.
Arabidopsis trichome research sheds light on cotton fiber development mechanisms
XueYing Guan,Nan Yu,XiaoXia Shangguan,Shui Wang,Shan Lu,LingJian Wang,XiaoYa Chen
Chinese Science Bulletin , 2007, DOI: 10.1007/s11434-007-0273-2
Abstract: Aerial surfaces of most land plants have epidermal hairs (trichomes). Both Arabidopsis thaliana trichomes and cotton fibers (seed hairs) are nonglandular hairs with unicellular structure. Here we outline the recent progress on molecular dissection of Arabidopsis trichome development, including the transcription factors regulating trichome initiation, phytohormones influencing trichome density, and the cytoskeleton formation system governing trichome morphogenesis. There is increasing evidence showing that these processes also control cotton fiber production. As several cotton fiber genes are able to rescue the Arabidopsis trichome mutants, we discuss the conservation between Arabidopsis trichome and cotton fiber development.
Isolation of a (+)- δ-cadinene synthase gene CAD1-A and analysis of its expression pattern in seedlings ofGossypium arboreum L.
Wanqi Liang,Xiaoping Tan,Xiaoya Chen,Takashi Hashimoto,Yasuyuki Yamada,Peter Heinstein
Science China Life Sciences , 2000, DOI: 10.1007/BF02879283
Abstract: The cotton sesquiterpene cyclase, (+)-δ-cadinene synthase, is encoded by a gene family, which can be divided into two subfamilies:CAD1-A and CAD1-C. The geneCAD1-A was isolated fromG. arboreum. In situ hybridization performed on seven-day-old cotton seedlings localized transcripts of both the CAD1 -A and CAD1 -C mainly in lateral root primordium and apical ground meristem, vascular tissues of emerging lateral roots, and also in procambium and some subepidermal cells of the hypocotyl. The CAD1 -A promoter showed a similar tissue-specificity in transgenic tobacco plants. Histochemistry showed occurrence of sesquiterpene aldehydes in outer cells of the lateral root tips, as well as in pigment glands. The CAD1 gene expression in G.arboreum seedlings and the spatial pattern of sesquiterpene biosynthesis constitute a chemical defense machinery in cotton seedlings.
A comparative analysis ofafuzzless-lintless mutant ofGossypium hirsutum L. cv. Xu-142
Xiaohong Yu,Yongqing Zhu,Shan Lu,Tianzhen Zhang,Xiaoya Chen,Zhihong Xu
Science China Life Sciences , 2000, DOI: 10.1007/BF02882283
Abstract: Afuzzless-lintless (fl) seed mutant ofGossypium hirsutum L. cv. Xu-142 was investigated to study cotton fiber development. Scanning electron microscopy revealed that fiber initials were virtually absent fromfl ovules. RT-PCR analysis showed that the steady-state levels of transcripts of the fiber-specificE6 andExpansin genes were high in wild type (WT) ovules during the fiber initiation and elongation stages, and peaked around 15 days post anthesis (DPA), but only a trace amount of these transcripts was detectable infl ovules of all developmental stages investigated.CotmybA, a member of theMyb family, exhibited a clear expression in developing WT ovules, but the expression was abnormal infl ovules. Application of GA3, or GA3 plus IAA, to the culture medium rescuedin vitro fiber initiation and growth offl ovules only partially. In addition, transcription ofE6 andExpansin genes ofin vitro cultured WT andfl ovules responded similarly to exogenous hormones. The hormones had less effect onCotmybA transcription in ovules culturedin vitro, and again the WT andfl ovules showed a similar expression. These results suggest that the abnormal or extremely low level of expression ofE6, Expansin andCotmybA genes in developingfl seeds is related to the absence of seed-hairs, and the mechanism underlying needs further investigation.
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