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Search Results: 1 - 10 of 22683 matches for " Xin Er See "
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Effects of Root-Zone Temperature on Photosynthesis, Productivity and Nutritional Quality of Aeroponically Grown Salad Rocket (Eruca sativa) Vegetable  [PDF]
Jie He, Xin Er See, Lin Qin, Tsui Wei Choong
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.714181
Abstract: Although tropical high ambient temperature and humidity severely reduced the productivity of temperate plants, temperate vegetable crops such as lettuce have been successfully grown in Singapore by only cooling its root-zone. In this paper, a cool Meditteranean vegetable, Eruca sativa, was studied to understand how different RZTs can impact its shoot productivity, photosynthesis and nutritional quality. All plants were cultivated using aeroponic systems in a tropical greenhouse under hot ambient conditions where roots were subjected to four different root-zone temperatures (RZTs) of 20°C-RZT, 25°C-RZT, 30°C-RZT and fluctuating ambient temperatures ranged from 25°C to 38°C [25°C/38°C (ambient)]-RZT. Parameters studied include shoot fresh weight (FW), photosynthetic gas exchange, midday chlorophyll (Chl) fluorescence Fv/Fm ratio, Chl fluorescence photochemical quenching (qP), non-photochemical quenching (qN) and electron transport rate (ETR), total phenolic compounds and mineral content such as potassium (K), calcium (Ca), magnesium (Mg) and iron (Fe). Among the 4 different RZT treatments, E. sativa plants grown under ambient-RZT (25/38°C-RZT) had the lowest shoot and root FW while those plants grown under 20°C-RZT had highest productivity of shoot and root. However, there were no significant differences in shoot and root FW in plants grown at 25°C- and 30°C-RZT. Compared to plants grown under 25°C/38°C (ambient-RZT), light-saturated photosynthetic CO
Restoring the harmony and order of the body: treatment of cancer patients according to syndrome differentiation
YU Er-Xin
Zhong Xi Yi Jie He Xue Bao , 2003,
Abstract: ABSTRACT: By reviewing the clinical work of the past 40 years and combining with the theories of traditional Chinese medicine,the author proposed that the spleen plays a key role in treating liver cancer according to syndrome differentiation. Based on the clinical and experimental research work, the author advanced a theory that the goal of the treatment of cancer according to syndrome differentiation is to restore the harmony and order of the body. Further research into this theory will be conducive to establishing a new theoretical system of integrative medicine on cancer treatment.
Characterization and Iron Removal Treatment of Ion-Adsorption Rare Earth Tailings in Southern China  [PDF]
Yongqing Wang, Xin Nie, Qibing Chang, Huayin Liang, Xiaozhen Zhang, Jian-Er Zhou
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2016, DOI: 10.4236/jmmce.2016.42012
Abstract: The ion-adsorption rare earth tailings have become a serious environmental pollution in Southern China, yet the potential of their economical value has not been fully exploited. In this work, the chemical and mineral compositions of the ion-adsorption rare earth tailings were characterized by Mineral Liberation Analyze (MLA) and XRF. The results show that 91.98 wt% of the tailings are composed of kaolinite and quartz, latter of which was removed by the sieving method. The other minor minerals contain feldspar, biotite, muscovite, titanomagnetite and limonite. Amongst these, the iron-bearing minerals are mostly found in the titanomagnetite and limonite which can be mostly removed by using a periodic high-gradient magnetic separator with a magnetic induction of 0.6 Tesla. The Fe2O3 content of the tailings changed from 2.11 wt% to 1.06 wt% after the sorting process, which met the Chinese national standard of TC-3 grade raw materials for ceramic industry applications. The Fe2O3 content in kaolinite was further decreased after Na2S2O4 treatment.
Role of transparency of platinum-ferromagnet interface in determining intrinsic magnitude of spin Hall effect
Weifeng Zhang,Wei Han,Xin Jiang,See-Hun Yang,Stuart S. P. Parkin
Physics , 2015, DOI: 10.1038/nphys3304
Abstract: The spin Hall effect (SHE) converts charge current to pure spin currents in orthogonal directions in materials that have significant spin-orbit coupling.The efficiency of the conversion is described by the spin Hall Angle (SHA). The SHA can most readily be inferred by using the generated spin currents to excite or rotate the magnetization of ferromagnetic films or nano-elements via spin-transfer torques.Some of the largest spin torque derived spin Hall angles (ST-SHA) have been reported in platinum. Here we show, using spin torque ferromagnetic resonance (ST-FMR) measurements, that the transparency of the Pt-ferromagnet interface to the spin current plays a central role in determining the magnitude of the ST-SHA. We measure a much larger ST-SHA in Pt/cobalt (~0.11) compared to Pt/permalloy (~0.05) bilayers when the interfaces are assumed to be completely transparent. Taking into account the transparency of these interfaces, as derived from spin-mixing conductances, we find that the intrinsic SHA in platinum has a much higher value of 0.19 +- 0.04 as compared to the ST-SHA. The importance of the interface transparency is further exemplified by the insertion of atomically thin magnetic layers at the Pt/permalloy interface that we show strongly modulates the magnitude of the ST-SHA.
Spin injection and detection in lanthanum- and niobium-doped SrTiO3 using the Hanle technique
Wei Han,Xin Jiang,Adam Kajdos,See-Hun Yang,Susanne Stemmer,Stuart S. P. Parkin
Physics , 2013, DOI: 10.1038/ncomms3134
Abstract: There has been much interest in the injection and detection of spin polarized carriers in semiconductors for the purposes of developing novel spintronic devices. Here we report the electrical injection and detection of spin-polarized carriers into Nb-doped strontium titanate (STO) single crystals and La-doped STO epitaxial thin films using MgO tunnel barriers and the three-terminal Hanle technique. Spin lifetimes of up to ~100 ps are measured at room temperature and vary little as the temperature is decreased to low temperatures. However, the mobility of the STO has a strong temperature dependence. This behavior and the carrier doping dependence of the spin lifetime suggest that the spin lifetime is limited by spin-dependent scattering at the MgO/STO interfaces, perhaps related to the formation of doping induced Ti3+. Our results reveal a severe limitation of the three-terminal Hanle technique for measuring spin lifetimes within the interior of the subject material.
Underdetermined DOA Estimation via Independent Component Analysis and Time-Frequency Masking
Peter Jan ovi ,Xin Zou,Münevver K küer
Journal of Electrical and Computer Engineering , 2010, DOI: 10.1155/2010/450487
Abstract: This paper presents an algorithm for the estimation of the direction of arrival (DOA) in underdetermined situations, that is, there is more sources than sensors. The algorithm performs the estimation in an iterative manner, each iteration consists of two-steps: first estimation of the DOA of a dominant source via the Independent Component Analysis and then removal of the detected source from the mixture via time-frequency masking. Experiments, performed using speech signals mixed in real environment when only two microphones are used but three and four sources are present, demonstrate that the proposed algorithm can estimate the DOAs more accurately than two previously used underdetermined DOA algorithms.
Review and Prospect of First-principles Calculations on Piezoelectric Materials
XIN Jun,ZHENG Yan-Qing,SHI Er-Wei
无机材料学报 , 2007, DOI: 10.3724/sp.j.1077.2007.00193
Abstract: The first-principles calculations were widely used in many different fields of materials science. Most of the calculations were based on the density functional theory. Starting from the density functional theory (DFT), we first summarized the theory of first-principles calculations in detail, then we introduced how to get the piezoelectric constants, dielectric constants etc by using the density functional perturbation theory (DFPT) and the Berry-phase theory. We summarized the recent literatures about the first-principles calculations of piezoelectric properties. In the end we summed up the problem existed nowadays and foresaw the future.
Comparison of 3 titration methods of positive airway pressure for obstructive sleep apnea syndrome: a random, single-blind and self-control clinical study
Yan LI,Xin-xin LIU,Wan-er WANG,Yang WANG
Medical Journal of Chinese People's Liberation Army , 2013,
Abstract: Objective  To evaluate the efficacy and safety of polysomnography-manual continuous positive airway pressure titration (PSG-CPAP), polysomnography-automatic positive airway pressure titration (PSG-APAP), or automatic positive airway pressure titration (APAP) in patients with moderate or severe simple obstructive sleep apnea syndrome (OSAS). Methods  Twenty patients with moderate or severe OSAS sequentially underwent PSG-CPAP, PSG-APAP and APAP titration 3 days apart, and then 3 primary efficacy indicators (titration pressure, remaining respiratory event and state of sleep), and safety indicators (compression injury of face skin, the subjective evaluation on degree of comfort or any complaint during titration) were compared. Results  The results of efficacy indicators revealed that all PSG-APAP, APAP and PSG-CPAP were effective. Compared with the optimal pressure of PSG-CPAP titration, PSG-APAP and APAP pressures were 3.05 and 2.55cmH2O higher, respectively, in 90% of occasion (P<0.01). However, there was no statistically significant difference between APAP and PSG-APAP titration (P>0.05). There was no statistically significant difference between the optimal pressure of PSG-CPAP and the mean pressures of PSG-APAP and APAP (P>0.05). There was no statistically significant difference between the 3 titration methods on residue apnea/hypopnea index (AHI, P>0.05). The oxygen desaturation index (ODI) decreased significantly after titration treatment (P<0.01), but no statistically significant difference was found between PSG-CPAP and PSG-APAP titration (P>0.05). Both PSG-CPAP and PSG-APAP titrations showed the same effects in improving ODI. Compared with basic PSG, no obvious improvement was found in sleep efficiency (SE) after PSG-CPAP and PSG-APAP titration (P>0.05), however, the arousal index (ArI) decreased obviously (P<0.01), the percentage of sleep time spent during N1 phase (N1%) and N2 phase (N2%) decreased significantly (P<0.05), but prolonged in N3 phase (N3%) and R phase (R%) significantly (P<0.01). Both PSG-CPAP and PSG-APAP improved the state of sleep, but with no significant difference (P>0.05). The results of safety indicators showed that no face skin compression injury or severe adverse event related to the titration was found in all the patients during the study. The main complaints of the patients were sleep disturbance, dryness of eyes or mouth, headache, breath holding and abdominal distention. Conclusion  Both PSG-APAP and APAP titration are effective in treatment with moderate or severe simple OSAS, the measured mean pressure may be used to
Approximation Algorithm Based on Chain Implication for Constrained Minimum Vertex Covers in Bipartite Graphs
Jian-Xin Wang,Xiao-Shuang Xu,Jian-Er Chen,
Jian-Xin Wang
,Xiao-Shuang Xu,and Jian-Er Chen

计算机科学技术学报 , 2008,
Abstract: The constrained minimum vertex cover problem on bipartite graphs (the Min-CVCB problem) is an important NP-complete problem. This paper presents a polynomial time approximation algorithm for the problem based on the technique of chain implication. For any given constant > 0, if an instance of the Min-CVCB problem has a minimum vertex cover of size (k u , k l ), our algorithm constructs a vertex cover of size (k * u , k * l ), satisfying max {k * u /k u , k * l /k l } ≤ 1 + . Electronic supplementary material The online version of this article (doi: ) contains supplementary material, which is available to authorized users. This work is supported by the National Natural Science Foundation of China under Grant Nos. 60433020 and 60773111, the National Basic Research 973 Program of China under Grant No. 2008CB317107, the Provincial Natural Science Foundation of Hunan under Grant No. 06JJ10009, the Program for New Century Excellent Talents in University under Grant No. NCET-05-0683 and the Program for Changjiang Scholars and Innovative Research Team in University under Grant No. IRT0661.
Modifying the DPClus algorithm for identifying protein complexes based on new topological structures
Min Li, Jian-er Chen, Jian-xin Wang, Bin Hu, Gang Chen
BMC Bioinformatics , 2008, DOI: 10.1186/1471-2105-9-398
Abstract: Based on the study of known complexes in protein networks, this paper proposes a new topological structure for protein complexes, which is a combination of subgraph diameter (or average vertex distance) and subgraph density. Following the approach of that of the previously proposed clustering algorithm DPClus which expands clusters starting from seeded vertices, we present a clustering algorithm IPCA based on the new topological structure for identifying complexes in large protein interaction networks. The algorithm IPCA is applied to the protein interaction network of Sacchromyces cerevisiae and identifies many well known complexes. Experimental results show that the algorithm IPCA recalls more known complexes than previously proposed clustering algorithms, including DPClus, CFinder, LCMA, MCODE, RNSC and STM.The proposed algorithm based on the new topological structure makes it possible to identify dense subgraphs in protein interaction networks, many of which correspond to known protein complexes. The algorithm is robust to the known high rate of false positives and false negatives in data from high-throughout interaction techniques. The program is available at http://netlab.csu.edu.cn/bioinformatics/limin/IPCA webcite.In the post-genomic era, one of the most important issues is to systematically analyze and comprehensively understand the topology of biological networks and biochemical progress in cells. Protein complexes can help us to understand certain biological progress and to predict the functions of proteins. As John Donne pointed out, no protein is an island entire of itself or at least, very few proteins are. Most proteins seem to function within complicated cellular pathways, interacting with other proteins either in pairs or as components of larger complexes [1,2].Various methods have been used to detect protein complexes. Large-scale mass-spectrometric studies in Saccharomyces cerevisiae provide a compendium of protein complexes that are considered to
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