Jing Liu

Publications (124)111.93 Total impact

• Article: Hydrogen Sulfide Regulates Ethylene-induced Stomatal Closure in Arabidopsis thaliana.

  Zhihui Hou, Lanxiang Wang, Jing Liu, Lixia Hou, Xin Liu
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  ABSTRACT: Hydrogen sulfide (H(2) S) is a newly-discovered signaling molecule in plants and has caused increasing attention in recent years, but its function in stomatal movement is unclear. In plants, H(2) S is synthesized via cysteine degradation catalyzed by D-/L-cysteine desulfhydrase (D-/L-CDes). AtD-/L-CDes::GUS transgenic Arabidopsis thaliana plants were generated and used to investigate gene expression patterns, and results showed that AtD-/L-CDes can be expressed in guard cells. We also determined the subcellular localization of AtD-/L-CDes using transgenic plants of AtD-/L-CDes::GFP, and the results showed that AtD-CDes and AtL-CDes are located in the chloroplast and in the cytoplasm, respectively. The transcript levels of AtD-CDes and AtL-CDes were affected by the chemicals that cause stomatal closure. Among these factors, ACC, a precursor of ethylene, has the most significant effect, which indicates that the H(2) S generated from D-/L-CDes may play an important role in ethylene-induced stomatal closure. Meanwhile, H(2) S synthetic inhibitors significantly inhibited ethylene-induced stomatal closure in Arabidopsis. Ethylene treatment caused an increase of H(2) S production and of AtD-/L-CDes activity in Arabidopsis leaves. AtD-/L-CDes over-expressing plants exhibited enhanced induction of stomatal closure compared to the wild-type after ethylene treatment; however, the effect was not observed in the Atd-cdes and Atl-cdes mutants. In conclusion, our results suggest that the D-/L-CDes-generated H(2) S is involved in the regulation of ethylene-induced stomatal closure in Arabidopsis thaliana.
  Journal of Integrative Plant Biology 11/2012; · 2.53 Impact Factor
• Article: [Multivariate regression analysis of the biomarkers and clinical characteristics in the prognosis of malignant melanoma].

  Jing Liu, Rong Li, Xiaoping Zhou, Junyi Zhang, Rongcheng Luo
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  ABSTRACT: To evaluate the impact of the biomarkers and the clinicopathological characteristics on the prognosis of malignant melanoma (MM). The clinical data of 127 MM cases were retrospective analyzed. The surgical specimens of MM were analyzed with immunohistochemistry for detecting HMB45, S-100 and vimentin expressions, and univariate and multivariate regression analysis was performed to analyze their correlation to the prognosis of the patients. Among the 127 MM cases, the positivity rates of HMB45, S-100 and vimentin were 89.8%, 92.1% and 78.0%, respectively. Univariate analysis showed that the patients' age, ulcer, Clark classification, postoperative tumor margin, AJCC, treatment outcomes, and S-100 were significantly correlated to the prognosis, and multivariate analysis indicated that age, Clark classification, S-100, tumor margin and outcomes were the independent predictive factors for the prognosis of MM. S-100, age, Clark classification, S-100, tumor margin and treatment outcomes were the independent prognostic factors for MM, and HMB45 and vimentin have no predictive value in the prognosis of MM.
  Nan fang yi ke da xue xue bao = Journal of Southern Medical University 06/2012; 32(6):847-53.
• Article: Orientation dependence of dielectric and relaxor behaviour in Aurivillius phase BaBi2Nb2O9 ceramics prepared by spark plasma sintering

  Haixue Yan, Hongtao Zhang, Rick Ubic, Mike Reece, Jing Liu, Zhijian Shen
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  ABSTRACT: Grain-oriented Aurivillius phase BaBi2Nb2 O9 ceramics were fabricated using Spark Plasma Sintering (SPS). Their relaxor behaviour was confirmed by a strong frequency dispersion of the dielectric response. The dielectric behaviour has been fitted using different relaxor models. The relaxor parameters are isotropic, while the dielectric constants are highly anisotropic. The piezoelectric constant d 33 is zero perpendicular and parallel to the hot pressing direction, and the P–E response is dominated by losses. The inability to pole the samples at room temperature is consistent with the T f temperature (∼ ∼115K) estimated from fitting the experimental data to the Vogel–Fulcher model. This suggests that it may be possible to observe piezoelectric and ferroelectric properties at very low temperatures.
  Journal of Materials Science Materials in Electronics 05/2012; 17(9):657-661. · 1.08 Impact Factor
• Article: Micro/nanofluidics-enabled energy conversion and its implemented devices

  Yang Yang, Jing Liu
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  ABSTRACT: Most people were not aware of the role of energy as a basic force that drives the development and economic growth of the world until the two great oil crises occurred. According to the conservation law, energy not only exists in various forms but is also capable of being converted from one form to another. The common forms of energy are mechanical energy, chemical energy, internal energy, electrical energy, atomic energy, and electromagnetic energy, among others. The fluids in nature serve as the most common carriers and media in the energy conversion process. Following the rapid development of microelectromechanical systems (MEMS) technology, the energy supply and conversion issue in micro/nano scale has also been introduced in research laboratories worldwide. With unremitting efforts, great quantities of micro/nano scale energy devices have been investigated. Micro/nanofluid shows distinct features in transporting and converting energy similar to their counterpart macroscale tasks. In this paper, a series of micro/nanofluid-enabled energy conversion devices is reviewed based on the transformation between different forms of energy. The evaluation and contradistinction of their performances are also examined. The role of micro/nanofluid as media in micro/nano energy devices is summarized. This contributes to the establishment of a comprehensive and systematic structure in the relationship between energy conversion and fluid in the micro/nano scale. Some fundamental and practical issues are outlined, and the prospects in this challenging area are explored. Keywordsmicro/nanofluid–different energy forms–energy conversion–medium role
  04/2012; 5(3):270-287.
• Article: Cultivation of Phlebopus portentosus in southern China

  Kai-Ping Ji, Yang Cao, Chun-Xia Zhang, Ming-Xia He, Jing Liu, Wen-Bing Wang, Yun Wang
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  ABSTRACT: Phlebopus portentosus is a well-known edible wild mushroom in the tropical part of Yunnan province of China. The mushrooms grow around natural or planted trees of Delonix regia, Mangifera indica, Coffea arabica, Citrus grandis, Artocarpus heterophyllus and Quercus spp. The technology of cultivation of P. portentosus was developed and its biotrophic status examined at Xishuangbanna, Yunnan, China. Uncultivated red soils with and without host plants of C. arabica, C. grandis and M. indica were inoculated with solid inocula of P. portentosus. Matured mushrooms were produced from both inoculated soils, with and without the host plants, 20–30 days after inoculation. No mycorrhizal structures were detected although the fungal mycelia colonized the plant root surfaces. Results show that P. portentosus is a saprobic rather than a symbiotic fungus. Based on this discovery, two methods of cultivation of P. portentosus were developed. Non-sterilized agricultural soils in polypropylene bottles or bags were inoculated with the fungal solid inocula and incubated at a mushroom house. Fruiting-body primordia were produced from the inoculated soils 20–30 days after inoculation. Soil-cased sawdust logs inoculated with P. portentosus produced primordia 10–15 days after casing only. The primordia developed into mature mushrooms 5–6 days later with weights ranging from 20.0 to 135.0 g. The identity of the cultivated fruiting bodies was confirmed by morphological and molecular methods. Our molecular phylogeny based on the Internal Transcribed Spacer sequences from our cultivated isolate and Genbank accessions provides preliminary insight into the phylogeogrpahy of P. portentosus. KeywordsEdible fungus–Saprobic black bolete–Cultivation–Yunnan
  Mycological Progress 04/2012; 10(3):293-300. · 1.55 Impact Factor
• Article: Multiscale effect of localized heating on the global temperature response of a human body during whole-body hyperthermia

  Dewei Jia, Shihai Xiang, Jing Liu
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  ABSTRACT: Hyperthermia has been one of the most promising cancer therapies. However, it requires an accurate thermal dosage in the treatment planning for a safe and effective exposure. This paper describes multi-scale theoretical approaches to evaluate the systemic temperature response of a human body subject to 10 W localized heating. The systemic bioheat transfer is modeled as a 49 compartment system with temperature-based feedback control. At the tissue level, bioheat transfer described by Pennes’ equation is solved by the finite-element method. Two multiscale simulations are considered. The first one is performed based on the assumption of homogenous temperature-distribution yet inhomogeneous heat deposition. It can pass non-temperature-dependent variables from local parts to global sites. Three properties of the source are thus studied. The second simulation is a combination of the compartment model and Pennes’ bioheat equation. It can also calculate strongly coupled variables dependent not only on space or time but also on temperature distribution. To compare the heat-delivery efficiency, benchmarks are developed to assess various hyperthermia modalities within a well-defined region of interest. The result from the first simulation shows a complex temperature-increment index (CTII) with a halved homogeneous temperature-increment coefficient (HTIC) when heated near vessel. The second simulation of extremity heating indicates a similar phenomenon of heat transport between tissues via blood perfusion rather than conduction. Both simulations show that up to 0.2–0.5 and 0.3°C increase in blood and brain temperature, respectively, were induced, which cannot be ignored in large dosage or long duration of localized heating during thermal ablation on a tumor. KeywordsBioheat transfer–Compartmental model–Temperature regulation–Thermal dosage–Treatment planning
  Journal of Engineering Mathematics 04/2012; 70(4):343-362. · 0.86 Impact Factor
• Article: Structural stability of infinite-layer CaCuCO2 under high pressure

  Xiaomei Qin, Ming Hong, Gongmu Zhang, Wenjie Mai, Fengying Li, Richeng Yu, Jing Liu, Changqing Jin
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  ABSTRACT: In situ high-pressure energy dispersive X-ray diffraction measurements on polycrystalline powder CaCuO2 with an infinite layer structure (IL CaCuO2) have been performed by using diamond anvil cell (DAC) instrument with synchrotron radiation. The results suggest that the crystal structure of IL CaCuO2 is stable under pressure up to 30 GPa at room temperature. According to Birch-Murnaghan equation of state, assuming pressure derivativeB′0 = 4, the bulk modulusB 0=181 ± 9 GPa is obtained. Keywordsinfinite-layer CaCuO2 -synchrotron radiation-high pressure energy dispersive X-ray diffraction
  Chinese Science Bulletin 04/2012; 48(12):1201-1203. · 1.32 Impact Factor
• Article: In vitro triplex formation and functional analysis of TFOs designed against human c-sis/PDGF-B proto-oncogene

  Jing Liu, Renhuan Xu, Youxin Jin, Debao Wang
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  ABSTRACT: PDGF (platelet derived growth factor) has been shown to play an important role in tumorigenesis, tumor growth, atherosclerosis and inflammation and other various pathologic settings. PDGF-B chain gene is 92% homologous to v-sis oncogene of the simian sarcoma virus. Thus PDGF-B gene is also called c-sis proto-oncogene. This report provides 3 TFOs (triplex-forming oligonucleotides) to inhibit the expression of c-sis/PDGF-B gene. The results from gel mobility shift analysis,in vitro transcription, DNase I footprinting and protein binding assays demonstrate that the TFOs we designed can form sequence-specific stable triplex with the target, and can effectively suppress the downstream gene transcription and inhibit transcription factors binding. They can be used for preparation of drugs to inhibit tumor growth and for the therapy of atherosclerosis, inflammation, etc.
  Science in China Series C Life Sciences 04/2012; 44(1):83-91. · 1.61 Impact Factor
• Article: Spectroscopic and macroscopic studies of the adsorption of arsenate and phosphate on polynuclear aluminum organomineral precipitates

  Jing Liu, Fenghua Zhao
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  ABSTRACT: Aluminum organic coprecipitates play important roles in the transport of oxyanions in soil environment. A new polynuclear aluminum organomineral precipitate (Al13-oxalate precipitate) was prepared to investigate the adsorption behavior of arsenate and phosphate on noncrystalline aluminum precipitates. Important thermodynamic parameters for adsorption reaction were evaluated using macroscopic adsorption data and equations. The result showed that, the adsorption reaction basically is a diffusion process. FTIR spectroscopic studies have provided evidence for the formation of two different types of complexes in substrate, protonated bidentate and deprotonated bidentate complexes at pH 4 and pH≥6, respectively. The classic competitive adsorption and XPS studies both indicated that phosphate has stronger chemical interaction with substrate than arsenate. The findings of XPS studies revealed that the precipitate substrate can act as Lewis acid when adsorbing oxyanions. Key wordsorganomineral precipitate–competitive adsorption–spectroscopic study
  Chinese Journal of Geochemistry 04/2012; 30(2):264-269.
• Article: Magnetism and transport properties of HfFe6Ge6-type Er1−xGdxMn6Ge6 (x=0.2−0.9) compounds

  Ruwu Wang, Jing Liu, Yunbao Li, Dengjing Wang, Jie Yuan, Yuhua Wang, Yawei Li
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  ABSTRACT: Magnetic transitions and magnetotransport properties of polycrystalline Er1−x Gd x Mn6Ge6 (x=0.2−0.9) compounds were studied. The magnetic and resistivity properties were analyzed in an applied magnetic field up to 5 T. It is found that Er1−x Gd x Mn6Ge6 (x=0.2−0.9) compounds displays a transition from the antiferromagnetic state to the ferrimagnetic state for increasing Gd content. The Er1−x Gd x Mn6Ge6 with x=0.2 and 0.5 compounds order antiferromagnetically at 430 and 432 K, respectively. The Er1−x Gd x Mn6Ge6 with x=0.8 and 0.9 compounds order ferrimagnetically at 462 and 471 K, respectively. The Er1−x Gd x Mn6Ge6 compounds undergo the second transitions below 71 K. The magnetoresistance curves of the Er0.1Gd0.9Mn6Ge6 compound in a field of 5 T are presented and the magnetoresistance effects are related to the metamagnetic transitions. Key wordsHfFe6Ge6 -magnetism-magnetoresistance effect
  Journal of Wuhan University of Technology-Mater Sci Ed 04/2012; 25(3):415-418. · 0.35 Impact Factor
• Article: Structural change and mineralogical transformation mechanism of aluminum hydroxide gels from forced hydrolysis Al(III) solutions containing AlO4Al12(OH)24(H2O)127+ polyoxycation during aging

  Jing Liu, Fenghua Zhao
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  ABSTRACT: The structural change and mineralogy of Al gel during aging time were investigated by using spectroscopy techniques. The results indicated that: 1) the aggregation extent of solution-gel system increases with aging time, and the structure of amorphous gel becomes more short-ordered; 2) after six months, the gel formats nordstrandite and little gibbsite; 3) a marked decrease in the number of (Al-OH)oh bands occurring at 610 cm−1 and increase in the number of (Al-OH2)oh bands occurring at 555 cm−1 indicate that the gel undergoes rearrangement-like process during aging; 4) the gel constantly contains Al-O tetrahedron of Keggin structure, but the signal peak occurring at ≈61×10−6 of 27Al MAS NMR have a slight shift to downfield with aging time. A mineralogical transformation mechanism for hydrolysis Al(III) solution was proposed.
  Chinese Journal of Geochemistry 04/2012; 29(1):107-112.
• Article: Clinical observation on tuina therapy for cervicogenic headache

  Ning Li, Jing Liu, Meng-fo Zhang
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  ABSTRACT: ObjectiveTo observe the clinical effects of tuina therapy for cervicogenic headache. MethodsFifty-four cases were randomized allocated into tuina group and medicine group, 27 cases in each group. The patients in the tuina group treated with tuina therapy, and the patients in the medicine group take ibuprofen orally. The headache degree (Visual Analogue Scale, VAS), frequency of headache occurrence and the neck disability index (NDI) were compared 2 weeks pre-treatment and 2 weeks post-treatment. ResultsBefore treatment, there were no significant differences in the headache VAS, frequency and NDI between the two groups. After treatment, headache VAS, frequency and NDI were significantly decreased, and there were statistical differences between the tuina group and the medicine group (P<0.01). ConclusionTuina therapy is more effective for treating cervicogenic headache than routine dose of ibuprofen. 目的观察推拿手法治疗颈源性头痛的临床疗效。 方法54 例患者随机分为推拿组和药物组, 推拿组27 例, 接受中医推拿治疗, 药物组27 例, 口服布洛芬治疗。 比较治疗前2 星期和治疗后2 星期病患的头痛程度(VAS)、 头痛发作频率和颈椎功能障碍(NDI)的改善。 结果治疗前推拿组和药物组的VAS, 发作频率和NDI评分差异无统计学意义; 治疗后两组VAS, 发作频率, NDI均有下降, 推拿组与药组比较差异有统计学意义(P < 0.01)。 结论推拿治疗颈源性头痛疗效优于常规剂量布洛芬。
  Journal of Acupuncture and Tuina Science 04/2012; 7(6):343-346.
• Article: Synthesis and characterization of Al13-oxalate gel with Keggin structure

  Jing Liu, Fenghua Zhao
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  ABSTRACT: In this study, the Al13-oxalate gel synthesized from Al13 solution was characterized by XRD, FTIR and MAS 27Al NMR. The results are: 1) the gel shows obvious XRD diffraction peaks, which is different from common Al gels and their oxalate precipitations; 2) the peak of Al-O stretch vibration of Al13-oxalate complexes at 810 cm−1 indicates that the gel was formed directly by the complexes, and the characteristic peaks of IR and solid-state NMR respectively occur at 725 cm−1 and ∼6.1×10−5 chemical shift, which are respectively assigned to (Al-O)Td vibration and (Al-O)4 tetrahedron, suggesting that the gel has a unique Keggin structure; 3) Al13 polyoxocation can directly form gel with oxalate, even in a high-pH environment (=7.8). This finding provides new evidence for the universality of Al13 in natural environments. Through chemical analysis, the chemical formula of the gel was determined to be AlO4Al12(OH)24(H2O)12(C2O4)7/2.
  Chinese Journal of Geochemistry 04/2012; 28(4):364-368.
• Article: Determination of p-nitroaniline by the tartrate-acetone-Mn2+-KBrO3-H2SO4 double organic substrate oscillating system using non-equilibrium stationary state

  Jinzhang Gao, Jing Liu, Jie Ren, Xiuli Niu, Yingying Zhang, Wu Yang
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  ABSTRACT: This paper described the determination of p-nitroaniline in a double organic substrate oscillating system of tartrate-acetone-Mn2+-KBrO3-H2SO4. Under the optimum conditions, temperature was chosen as a control parameter to design the bifurcation point and proposed a convenient method for determination of p-nitroaniline. Results showed that the system consisting of 3.5 mL 0.06 mol L−1 tartrate, 4.0 mL 0.7 mol L−1 H2SO4, 1.5 mL 1.5×10−4 mol L−1 MnSO4, 4.0 mL 0.4 mol L−1 acetone and 7.0 mL 0.05 mol L−1 KBrO3 was very sensitive to the surrounding at 33.5°C. A good linear relationship between the potential difference and the negative logarithm concentration of p-nitroaniline was obtained to be in the range of 2.50×10−7∼3.75×10−5 mol L−1 with a lower detection limit of 2.50×10−8 mol L−1.
  Central European Journal of Chemistry 04/2012; 7(3):298-302. · 1.07 Impact Factor
• Article: Inducible expression pattern of rice Bowman-Birk inhibitor geneOsWIP1-2 and its protease inhibitory activity

  Jun Chen, Jing Liu, Lei Guo, Lijia Qu, Zhangliang Chen, Hongya Gu
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  ABSTRACT: TheWIP1-2 gene was cloned from rice. It belongs to the Bowman-Birk inhibitor gene family. Northern blot showed that expression of this gene was induced by wounding and jasmonic acid (JA). It indicates that theOsWIP1 gene plays an important role in the rice defense system. TheOsWIP1-2 was cloned into pET28a and expressed inE. coli. Its expressed product was purified in the form of fusion protein and tested for the inhibitory activities against trypsin and chymotrypsin. It was found that the fusion protein could inhibit chymotrypsin, but not trypsin. It was also found that the His tag at its C-terminal affected its inhibitory activity significantly. The fusion protein with a natural C-terminal had the inhibitory activity, while no inhibitory activity was detected in the fusion protein with a (His)6-tag at its C-terminal. This implies that extra amino acid residues at the C-terminal of OsWIP1-2 may interfere with its correct folding. The inhibitory assay indicated that the members of rice Bowman-Birk inhibitor gene family probably differentiated both in their structure and function. KeywordsBowman-Birk inhibitor-WIP1-rice-wound inducible-jasmonic acids
  Chinese Science Bulletin 04/2012; 49(9):895-899. · 1.32 Impact Factor
• Article: Giant optical nonlinearity of silver-doped silicon thin film at low power input: laser-triggered cluster resonance

  Jingsong Wei, Jing Liu, Mufei Xiao
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  ABSTRACT: Silver-doped silicon thin films were deposited on glass substrate in a co-sputtering procedure. Silver nanoparticles were segregatedly distributed. The nonlinear properties were extracted by z-scan measurements at low laser input power. For about 50% silver density, the nonlinear absorption and refraction coefficients peaked, respectively, at −8.086×10−2m/W and 1.47×10−9m2/W, which, with respect to the input intensity, are several orders higher than reported data. The sudden surge of nonlinear responses was explained satisfactorily based on a self-consistent microscopic model calculation for silver clusters. Resonances exist and depend apparently on the laser-modified local cluster concentration.
  Applied Physics A 04/2012; 104(4):1031-1037. · 1.63 Impact Factor
• Article: Silica sulfuric acid-catalyzed expeditious environment-friendly hydrolysis of carboxylic acid esters under microwave irradiation

  Zheng Li, Jing Liu, Xue Gong, Xuerong Mao, Xiunan Sun, Zhouxing Zhao
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  ABSTRACT: Silica sulfuric acid was found to be an efficient, recoverable, reusable and environment-friendly catalyst for the fast hydrolysis of various carboxylic acid esters in high conversions and selectivities under microwave irradiation conditions. This protocol has the advantages of no corrosion, no environmental pollution, high reaction rate, high yield, and simple work-up procedure.
  Chemical Papers- Slovak Academy of Sciences 04/2012; 62(6):630-634. · 1.10 Impact Factor
• Article: Roles of a sustained activation of NCED3 and the synergistic regulation of ABA biosynthesis and catabolism in ABA signal production in Arabidopsis

  HuiBo Ren, YiJian Fan, ZhiHui Gao, KaiFa Wei, GuiFen Li, Jing Liu, Lin Chen, BingBing Li, JianFang Hu, WenSuo Jia
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  ABSTRACT: ABA, acting as a stress signal, plays crucial roles in plant resistance to water stress. Because ABA signal production is based on ABA biosynthesis, the regulation of NCED, a key enzyme in the ABA biosynthesis pathway, is normally thought of as the sole factor controlling ABA signal production. Here we demonstrate that ABA catabolism in combination with a synergistic regulation of ABA biosynthesis plays a crucial role in governing ABA signal production. Water stress induced a significant accumulation of ABA, which exhibited different patterns in detached and attached leaves. ABA catabolism followed a temporal trend of exponential decay for both basic and stress ABA, and there was little difference in the catabolic half-lives of basic ABA and stress ABA. Thus, the absolute rate of ABA catabolism, i.e. the amount of ABA catabolized per unit time, increases with increased ABA accumulation. From the dynamic processes of ABA biosynthesis and catabolism, it can be inferred that stress ABA accumulation may be governed by a synergistic regulation of all the steps in the ABA biosynthesis pathway. Moreover, to maintain an elevated level of stress ABA sustained activation of NCED3 should be required. This inference was supported by further findings that the genes encoding major enzymes in the ABA biosynthesis pathway, e.g. NCED3, AAO3 and ABA3 were all activated by water stress, and with ABA accumulation progressing, the expressions of NCED3, AAO3 and ABA3 remained activated. Data on ABA catabolism and gene expression jointly indicate that ABA signal production is controlled by a sustained activation of NCED3 and the synergistic regulation of ABA biosynthesis and catabolism.
  Chinese Science Bulletin 04/2012; 52(4):484-491. · 1.32 Impact Factor
• Article: Expression ofBacillus subtilis JA18 endo-β-1,4-glucanase gene inEscherichia coli and characterization of the recombinant enzyme

  Min Liu, Jun Wang, Jing Liu, Jianming Yao, Zengliang Yu
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  ABSTRACT: Endo-β-1,4-glucanase encoded byBacillus subtilis JA18 was expressed inEscherichia coli. The recombinant enzyme was purified and characterized. The purified enzyme showed a single band of 50 kDa by SDS-PAGE. The optimum pH and temperature for this endo-β-1,4-glucanase was pH 5.8 and 60 °C. The endo-β-1,4-glucanase was highly stable in a wide pH range, from 4.0 to 12.0. Furthermore, it remained stable up to 60 °C. The endo-β-1,4-glucanase was completely inhibited by 2 mM Zn2+, Cu2+, Fe3+, Ag+, whereas it is activated in the presence of Co2+. In addition, the enzyme activity was inhibited by 1 mM Mn2+ but stimulated by 10 mM Mn2+. At 1% concentration, SDS completely inhibited the enzyme. The enzyme hydrolysed carboxymethylcellulose, lichenan but no activity was detected with regard to avicel, xylan, chitosan and laminarin. For carboxymethylcellulose, the enzyme had a Km of 14.7 mg/ml.
  Annals of Microbiology 04/2012; 56(1):41-45. · 0.69 Impact Factor
• Article: Hybrid liquid metal–water cooling system for heat dissipation of high power density microdevices

  Yueguang Deng, Jing Liu
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  ABSTRACT: The recent decades have witnessed a remarkable advancement of very large scale integrated circuits (VLSI) and electronic equipments in micro-electronic industry. Meanwhile, the ever increasing power density of microdevices leads to the tough issue that thermal management becomes rather hard to solve. Conventional water cooling is widely used, but the convective coefficient is not high enough. Liquid metal owns much higher convective coefficient and has been identified as an effective coolant recently, but the high cost greatly precludes its large scale utilization. In this paper, a hybrid liquid metal–water cooling system which combines the advantages of both water and liquid metal cooling was proposed and demonstrated. By utilizing a liquid metal “heat spreader” in front of the water cooling module, this system not only owns more excellent cooling capability than that based on water alone, but also has much lower initial cost compared with absolute liquid metal cooling system. A series of experiments under different operation conditions have been performed to evaluate the cooling performance of this hybrid system. The compared results with absolute water cooling and liquid metal cooling system showed that the cooling capability of the new system is competitive with absolute liquid metal cooling, but the initial cost could be much lower. The theoretical thermal resistance model and economic feasibility also have been analyzed and discussed, which shows that the hybrid liquid metal–water cooling system is quite feasible and useful.
  Heat and Mass Transfer 04/2012; 46(11):1327-1334. · 0.90 Impact Factor