37 results on '"Ji Yuan Li"'
Search Results
2. Ancient DNA from Tubo Kingdom-related tombs in northeastern Tibetan Plateau revealed their genetic affinity to both Tibeto-Burman and Altaic populations
- Author
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Xue-Er Yu, Chang Sun, Ye-Tao Zou, Ji-Yuan Li, Xiaoyan Ren, and Hui Li
- Subjects
Genetics, Population ,Asian People ,Ethnicity ,Genetics ,Humans ,Genetic Variation ,General Medicine ,DNA, Ancient ,Tibet ,Molecular Biology - Abstract
The rise of the Tubo Kingdom is considered as the key period for the formation of modern groups on the Tibetan Plateau. The ethnic origin of the residents of the Tubo Kingdom is quite complex, and their genetic structure remains unclear. The tombs of the Tubo Kingdom period in Dulan County, Qinghai Province, dating back to the seventh century, are considered to be the remains left by Tubo conquerors or the Tuyuhun people dominated by the Tubo Kingdom. The human remains of these tombs are ideal materials for studying the population dynamics in the Tubo Kingdom. In this paper, we analyzed the genome-wide data of eight remains from these tombs by shotgun sequencing and multiplex PCR panels and compared the results with data of available ancient and modern populations across East Asia. Genetic continuity between ancient Dulan people with ancient Xianbei tribes in Northeast Asia, ancient settlers on the Tibetan Plateau, and modern Tibeto-Burman populations was found. Surprisingly, one out of eight individuals showed typical genetic features of populations from Central Asia. In summary, the genetic diversity of ancient Dulan people and their affiliations with other populations provide an example of the complex origin of the residents in the Tubo Kingdom and their long-distance connection with populations in a vast geographic region across ancient Asia.
- Published
- 2022
3. Study on Electrochemical Stripping Method of Graphene Electrode and Its Capacitive Properties
- Author
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Qi Qin, Jing Wang, Yan-Jie Wang, Ji-Yuan Li, Meng Song, Dian-Bo Zhang, and Yi-Ran Cui
- Subjects
Materials science ,Graphene electrode ,Chemical engineering ,Capacitive sensing ,General Materials Science ,Electrochemistry ,Stripping (fiber) - Abstract
Graphene has excellent properties, such as excellent conductivity, more pores, stable chemical and structural properties, high specific surface area, so it is usually used in the battery fields. In order to further explore the capacitive properties of graphene, this experiment used electrochemical stripping method, the electrochemical electrode was characterized by constant potential treatment methods, cyclic voltammetry curve, and constant current charging–discharging curve. The capacitive performance of modified graphene at different potentials was compared. If a constant potential peeling treatment is performed, the interlayer spacing of graphene increases, and this time, the specific surface area is enlarged, and the electrical properties of the graphene electrode material are correspondingly improved. Cyclic voltammetry curve results show that the graphene electrode exhibits better capacitance performance after being treated with a constant potential in neutral electrolyte. When treating with 3.1 V constant potential and voltage range of -1.1 V–1.1 V, capacitance can reach 327.273 F. The chronopotentiometry curve results show that 3.1 V graphene electrode mass ratio capacitance can reach 218.182 F/g under voltage range of -0.3 V–0.3 V, meeting the energy storage requirements of the battery industry, and it is expected to become an ideal electrode material in the field of supercapacitors.
- Published
- 2021
4. Reduced plastic film mulching under zero tillage boosts water use efficiency and soil health in semiarid rainfed maize field
- Author
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Ai-Tian Ren, Ji-Yuan Li, Ling Zhao, Rui Zhou, Jian-Sheng Ye, Yi-Bo Wang, Xu-Cheng Zhang, Kiprotich Wesly, Ming-Sheng Ma, and You-Cai Xiong
- Subjects
Economics and Econometrics ,Waste Management and Disposal - Published
- 2023
5. Soil labile organic carbon sequestration is tightly correlated with the abundance and diversity of arbuscular mycorrhizal fungi in semiarid maize fields
- Author
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Ai Tian Ren, Rui Zhou, Bede S. Mickan, Ming Sheng Ma, Kiprotich Wesly, Xu Cheng Zhang, You-Cai Xiong, and Ji Yuan Li
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Total organic carbon ,Community composition ,Abundance (ecology) ,Botany ,Soil Science ,Environmental Chemistry ,Development ,Biology ,Arbuscular mycorrhizal fungi ,General Environmental Science - Published
- 2020
6. Increasing periods after seeding under twice‐annually harvested alfalfa reduces soil carbon and nitrogen stocks in a semiarid environment
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You-Cai Xiong, Zheng-Guo Cheng, Wei Wang, Yong-Zhong Su, Bao-Zhong Wang, Ji-Yuan Li, Meng‐Ying Li, and Asfa Batool
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chemistry ,Agronomy ,Soil nitrogen ,Soil Science ,Environmental Chemistry ,chemistry.chemical_element ,Environmental science ,Seeding ,Soil carbon ,Development ,Nitrogen ,General Environmental Science - Published
- 2020
7. Effects of Deltamethrin and Endosulfan on the Population Growth of Brachionus calyciflorus at Different Algal (Scenedesmus obliquus) Densities
- Author
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Yi-Long Xi, Ji-Yuan Li, and Xiao-Ping Xu
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Pesticide ,Biology ,biology.organism_classification ,Population density ,Toxicology ,chemistry.chemical_compound ,Deltamethrin ,chemistry ,Aquatic plant ,Toxicity ,Brachionus calyciflorus ,Environmental Chemistry ,Population growth ,Endosulfan ,General Environmental Science - Published
- 2018
8. Improvement of wheat productivity and soil quality by arbuscular mycorrhizal fungi is density- and moisture-dependent
- Author
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Bao-Zhong Wang, Ji-Yuan Li, You-Cai Xiong, Minha Naseer, Chong-Liang Luo, and Hai-Xia Duan
- Subjects
Soil nutrients ,0106 biological sciences ,Environmental Engineering ,[SDV]Life Sciences [q-bio] ,Arbuscular mycorrhizal fungi ,01 natural sciences ,Soil retrogression and degradation ,Water-use efficiency ,Water content ,The Loess Plateau ,2. Zero hunger ,Rhizosphere ,fungi ,food and beverages ,Sowing ,04 agricultural and veterinary sciences ,Soil carbon ,15. Life on land ,Soil quality ,6. Clean water ,Agronomy ,Productivity (ecology) ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Agronomy and Crop Science ,Agroecology ,010606 plant biology & botany - Abstract
International audience; AbstractAdaptive management of arbuscular mycorrhizal fungi (AMF) provides a new option for sustainable agriculture. Previous studies showed that the functional role of AMF was frequently dependent on soil moisture and planting densities in the semiarid environment. However, a systematic quantitative analysis of the effects of AMF inoculation on crop productivity and soil quality needs to be investigated. Therefore, a 2-year field experiment was conducted to test the inoculation effects of AMF (Funneliformis mosseae) on wheat (Triticum aestivum L.) productivity and soil quality in the semiarid Loess Plateau under two water regimes (irrigated and non-irrigated) with seven plant densities in year 2017 and 2018. Our results showed that in the non-irrigated treatment, inoculation with AMF greatly increased dryland wheat aboveground biomass, crop productivity, water use efficiency, rhizosphere soil organic carbon, soil organic carbon to total nitrogen ratio, microbial biomass carbon to nitrogen ratio, and microbial biomass carbon and nitrogen (P
- Published
- 2021
9. Soil water balance dynamics under plastic mulching in dryland rainfed agroecosystem across the Loess Plateau
- Author
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Ai Tian Ren, You-Cai Xiong, Ji Yuan Li, Ling Zhao, Fei Mo, Rui Zhou, Yinglong Chen, and Shu Tong Liu
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0106 biological sciences ,Agroecosystem ,Ecology ,Plastic film ,Growing season ,04 agricultural and veterinary sciences ,010603 evolutionary biology ,01 natural sciences ,Agronomy ,Evapotranspiration ,Soil water ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Animal Science and Zoology ,Precipitation ,Water-use efficiency ,Agronomy and Crop Science ,Mulch - Abstract
In rain-fed semiarid areas, low soil water availability is a major challenge constraining crop productivity and agricultural sustainability. Soil surface mulching with plastic film has been widely used to improve soil water availability in the Loess Plateau of China. However, a systematic assessment on soil water balance dynamics under plastic mulching is still lacking. We conducted a meta-analysis on plastic mulching observations across the Loess Plateau to quantify the intensity of evapotranspiration (ET), spatiotemporal dynamics of soil water storage (SWS), and annual soil water balance in the plastic mulching systems. The results indicated that compared with non-mulching, plastic mulching significantly enhanced ET by 2.6% across the entire dataset. The magnitude of intensified ET was strongly associated with mulching pattern, mean annual precipitation and nitrogen application. Plastic mulching led to a significant increase in SWS by 8.4% at 0−60 cm soil layer, yet a decrease by 0.8% at 60−200 cm layer over the growing season, comparing with non-mulching. Importantly, an effective water recovery effect was observed at the deep soil layer under plastic mulching, as evidenced by the significantly greater SWS (+30%) over the fallow season, in comparison with that of non-mulching. Nitrogen input level and mean annual precipitation proved to be the most important factors in driving SWS. As a result, crop yield and water use efficiency were substantially improved under plastic mulching, and such enhancements were the most pronounced under full plastic mulching and lower annual mean precipitation. Increased vegetation growth due to plastic mulching can turn to impact soil water dynamics in both growing and fallow seasons, but it did not disrupt the annual equilibrium of SWS. Particularly, more precipitation storage at deep soil layer during the non-growing season appeared to fully offset the extra water loss by enhanced ET. Our findings provide critical insight into the success of plastic mulching farming practice regarding field productivity and soil water sustainability.
- Published
- 2021
10. Postoperative Cognitive Dysfunction Induced by Different Surgical Methods and Its Risk Factors
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Jia-Xuan Wu, Guo-Liang Gong, Bin Liu, Bai-Qing Shu, Zhi-Jian You, and Ji-Yuan Li
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Male ,Visual analogue scale ,Operative Time ,Blood Loss, Surgical ,Hypothermia ,Logistic regression ,Surgical methods ,03 medical and health sciences ,0302 clinical medicine ,Postoperative Complications ,030202 anesthesiology ,Risk Factors ,Abdomen ,medicine ,Humans ,Cognitive Dysfunction ,Aged ,business.industry ,Incidence (epidemiology) ,Incidence ,Age Factors ,General Medicine ,Perioperative ,Middle Aged ,medicine.disease ,Logistic Models ,Anesthesia ,Female ,Laparoscopy ,medicine.symptom ,business ,Postoperative cognitive dysfunction ,030217 neurology & neurosurgery ,Abdominal surgery - Abstract
The aim of the present study was to compare the effect of different surgical methods on postoperative cognitive function in patients undergoing abdominal surgery, determine the risk factors of postoperative cognitive dysfunction (POCD) by logistic regression, and investigate these risk factors through different surgical methods. A total of 70 patients undergoing selective abdominal surgery were selected into this study. The age of these patients ranged within 32 to 85 years. The cognitive function of these patients was assessed by the mini-mental state examination at one day before the operation, and at the first and seventh day after the operation. The temperature of the tympanic membrane, PETCO2 values, visual analogue scale scores, educational level, and operation time were recorded. Logistic regression analysis was used to analyze related factors of POCD. The incidence rate of perioperative hypothermia in groups O and L were 31.2 and 10.5 per cent, respectively; and the difference was statistically significant (P < 0.05). The difference in visual analogue scale scores at the first and seventh day after the operation between these two groups were statistically significant (P < 0.01). The incidence of POCD in group O was significantly higher than that in group L at the first and seventh day after the operation (P < 0.05). According to logistic regression results, it was found that age, perioperative hypothermia, and postoperative pain were risk factors of POCD. The difference in POCD for the patients undergoing abdominal surgery through different surgical methods was statistically significant, and this was closely correlated to perioperative hypothermia and postoperative pain.
- Published
- 2018
11. Arbuscular mycorrhizal fungus alters root-sourced signal (abscisic acid) for better drought acclimation in Zea mays L. seedlings
- Author
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You-Cai Xiong, Ying Zhu, Ai Tian Ren, Yinglong Chen, Lynette Abbott, Hong Xu Ren, and Ji Yuan Li
- Subjects
0106 biological sciences ,0301 basic medicine ,Stomatal conductance ,biology ,Inoculation ,fungi ,Drought tolerance ,food and beverages ,Plant Science ,Photosynthesis ,01 natural sciences ,Acclimatization ,Enzyme assay ,03 medical and health sciences ,chemistry.chemical_compound ,Horticulture ,030104 developmental biology ,chemistry ,biology.protein ,Water-use efficiency ,Agronomy and Crop Science ,Abscisic acid ,Ecology, Evolution, Behavior and Systematics ,010606 plant biology & botany - Abstract
Inoculation with arbuscular mycorrhizal (AM) fungi can modify stomatal behavior and increase antioxidant enzyme activities and therefore play a pivotal role in plant growth. We hypothesised that inoculation with AM fungi postpones the non-hydraulic root signal and alters physiological and biochemical traits, which enhances drought tolerance and water-use efficiency (WUEB) for plant biomass. Two pot experiments (including progressive soil drying and partial root-zone drying) were conducted to reveal how mycorrhizal colonization altered root signal and its effects on plant growth, biochemical traits and WUEB in maize seedlings in drying soil. In our experiments, inoculation with Funneliformis mosseae improved water absorption and reduced the sensitivity of roots to drought. In addition, it decreased leaf abscisic acid (ABA) content of inoculated plants. Regardless of water conditions, plant biomass production, antioxidant enzyme activity, net photosynthetic rate, stomatal conductance and WUEB were elevated in AM fungal treatments compared to non-AM fungal treatments. Under water-stressed conditions, inoculation with F. mosseae greatly reduced leaf ABA content, and postponed the decline in photosynthetic rate, stomatal conductance and osmotic adjustment. Malondialdehyde (MDA) level was significantly lower in mycorrhizal plants than in non-inoculation plants. However, inoculation with F. mosseae increased antioxidant enzyme activities including peroxidase (POD) and superoxide dismutase (SOD). In this study, inoculation with F. mosseae reduced ABA accumulation that acts as a non-hydraulic root signal and thereby postponed a decline in stomatal conductance and photosynthetic rate, improved water use efficiency and antioxidant enzymes activities, and accordingly reduced proline and MDA content. Thus, inoculation with AM fungi played a role in effective defense for better drought acclimation in water-stressed maize seedlings.
- Published
- 2019
12. [Spectroscopic Study on a Direct-Current Driving Plasma Jet in Argon at Atmospheric Pressure]
- Author
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Xue-chen, Li, Cong, Di, Wen-ting, Bao, Chun-yan, Zhang, and Ji-yuan, Li
- Abstract
With a discharge device in a hollow-needle and plate electrode configurations, an atmospheric pressure uniform plasma plume is generated by DC voltage excitation in the ambient air with argon as working gas. The plasma plume is a pulsed discharge despite a direct current voltage is applied through measurements by optical and electrical methods. In order to explain the formation mechanism of the pulse, spatially resolved signals emitted from the plume were detected. It was found that the plasma plume denoted as the luminous layer propagates (a plasma bullet) from the hollow needle to the plate electrode except for the corona discharge in the vicinity of the hollow needle tip. Optical emission spectroscopy is used to investigate the excited electron temperature of the plasma plume as a function of the applied voltage or the spatial distribution of the excited electron temperature. The results show that the excited electron temperature (about 3 eV) increases with increasing applied voltage. Moreover, it increases with the increasing distance along the gas flow under constant voltage.
- Published
- 2018
13. Research and Application on Visualization of Discrete Spatial Grid Resource Data
- Author
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Hao Zhou, Yi Jun Zhong, and Ji Yuan Li
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Data grid ,Computer science ,business.industry ,Grid file ,Real-time computing ,Big data ,General Engineering ,computer.software_genre ,Grid ,Visualization ,DRMAA ,Smart grid ,Semantic grid ,Grid computing ,Data mining ,business ,computer - Abstract
In order to optimize the big data management of smart grid construction, analyze and process the extreme weather grid measuring point data of grid operation data which is abundant and discrete with mathematics. Considering of the continuous changing characteristics of weather in effective field of surface, buffer and expand the influential range of grid measuring point, then merge the same data, embellish the data with B-spline curve, store the spatial coordinates in enterprise-class grid resource centre, publish in map with unified service, and show the visual graphical distribution of extreme weather through OGC protocol, realize the visualization of grid resource.
- Published
- 2014
14. Regional Allocation for Carbon Emissions in Power System Based on Carbon Emission Efficiency and Energy Structure
- Author
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Hao Zhou and Ji Yuan Li
- Subjects
business.industry ,General Engineering ,Environmental engineering ,chemistry.chemical_element ,Environmental economics ,Electric power system ,Emission efficiency ,chemistry ,Greenhouse gas ,Carbon flow ,Environmental science ,Coal ,Energy structure ,China ,business ,Carbon - Abstract
China has become the largest carbon emitter in the world since 2008 for its coal dominated energy structure, which has attracted both economic and political attention from international society. This paper proposes a responsibility sharing principle for carbon emissions considering carbon emission efficiency and energy structure, which tries to promote the regional cooperation for carbon reduction among different regions on the domestic level. The case studies on China’?s six-region carbon flow network prove the effectiveness of proposed sharing principle.
- Published
- 2014
15. Genetic diversity of Camellia japonica (Theaceae), a species endangered to East Asia, detected by inter-simple sequence repeat (ISSR)
- Author
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Ying-Xiong Qiu, Ji-Yuan Li, Li Lin, Zhong-Yi Hu, and Sui Ni
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Genetic diversity ,Veterinary medicine ,biology ,Endangered species ,biology.organism_classification ,Biochemistry ,Analysis of molecular variance ,Camellia japonica ,Genetic distance ,Geographical distance ,Botany ,Genetic structure ,Theaceae ,Ecology, Evolution, Behavior and Systematics - Abstract
Inter-simple sequence repeat (ISSR) markers were used to investigate the genetic diversity within and among thirteen natural populations of Camellia japonica (L.). Twenty ISSR primers gave rise to 211 discernible DNA bands of which 190 (90.1%) were polymorphic. On average each primer gave rise to 10.55 bands including 9.50 bands with polymorphic profile. At the species level, high genetic diversity was detected (PPB: 90.1%; HE: 0.3414; H: 0.5013). However, relatively low genetic diversity existed within populations. Shiko-2 exhibits the greatest level of variability (PPB: 76.8%; HE: 0.2966; H: 0.4319), whereas XS presents its own variability at the lowest level (PPB: 67.3%; HE: 0.2344; H: 0.3478). A relatively high level of genetic differentiation among populations was revealed by Nei's gene diversity statistics (21.3%), Shannon's information measure (21.4%) and analysis of molecular variance (AMOVA) (22.5%). There was significant correlation between genetic distance and geographic distance (r = 0.8154, P
- Published
- 2013
16. Advances in Water Treatment Application of Sepiolite Mineral Materials
- Author
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Lei Feng, Meng Ran Tang, Fei Wang, Qing Guo Tang, and Ji Yuan Li
- Subjects
High energy ,Materials science ,Mineral ,Sepiolite ,General Engineering ,Mineralogy ,Water treatment ,Pulp and paper industry ,Quantum size effect ,Nanomaterials - Abstract
Synthetic nanomaterials have the disadvantages of large-scale investment, high energy consumption, complex production process and heavy environmental load. Mineral nanomaterials such as sepiolite group mineral nanomaterials are characterized by small size effect, quantum size effect and surface effect. Water treatment application of sepiolite group mineral nanomaterials has become an active research area and showed good development and application prospects. Based on the above reasons, this paper systematically summarizes the water treatment application of sepiolite group mineral nanomaterials, and development trend related to water treatment application of sepiolite group mineral nanomaterials were also proposed.
- Published
- 2013
17. Application of Experimental Teaching in University Education of Inorganic Material Specialty English
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Hui Min Liu, Lei Feng, Fei Wang, Ji Yuan Li, Hai Feng Liu, Ya Jing Li, and Ming Ming Cheng
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Engineering ,business.industry ,Mathematics education ,Specialty ,University education ,Inorganic materials ,General Medicine ,business ,Professional skills - Abstract
In the paper, the experimental teaching is adopted to the inorganic material specialty English to promote the English comprehensive ability and professional skills of students. The experiment is to prepare sepiolite nanofibers by means of the microwave chemical method using natural sepiolite samples as raw materials. Through the experiment, the English practical ability and skills of students are developed.
- Published
- 2013
18. Advances in Microstructure of Sepiolite Mineral Nanofibers
- Author
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Qing Guo Tang, Meng Ran Tang, Lei Feng, Fei Wang, and Ji Yuan Li
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Materials science ,Chemical engineering ,Thermal insulation ,business.industry ,Nanofiber ,Sepiolite ,Nanometre ,General Medicine ,Microporous material ,Mesoporous material ,Microstructure ,business ,Porous medium - Abstract
Sepiolite mineral nanofibers are typical porous materials widely existing in nature and have many nanometer level micropore and mesopore, which could play an active role in many fields such as thermal insulation functional additive for composite materials. Based on the above reason, this paper briefly summarized the research progress of microstructure of sepiolite mineral nanofibers, and research orientations related to microstructure of sepiolite mineral nanofibers were also proposed.
- Published
- 2013
19. [Investigation on the Spectral Characteristics of a Plasma Jet in Atmospheric Argon Glow Discharge]
- Author
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Xue-chen, Li, Chun-yan, Zhang, Ji-yuan, Li, and Wen-ting, Bao
- Abstract
Plasma jet is a kind of important plasma source at atmospheric pressure. In recent years, it becomes an important hot topic in the field of low temperature plasma. In this paper, using a tungsten needle and a tungsten wire mesh, a direct-current excited jet is developed to operate in argon at atmospheric pressure. In the atmospheric pressure argon, the plasma jet can produce a stable plasma plume. By using the method of emission spectroscopy, the parameters of the plasma plume are investigated. The discharge emits dazzling white light from the area between the tungsten needle electrode and the wire mesh electrode. A plasma plume with a flame shape appears outside the tungsten wire mesh electrode. For a constant value of voltage (U = 13.5 kV), the length of the plasma plume increases with the gas flow rate. For a constant value of the gas flow rate(10 L · min⁻¹), the length of the plasma plume increases with the voltage. The voltage is inversely proportional to the current under the constant gas flow rate. In other words, the voltage decreases with the discharge current, which indicates that a glow discharge is formed in the plasma jet. Optical emission spectrum in 300 to 800 nm is collected from the direct-current excited plasma jet. By Boltzmann plot method, the excited electron temperature of the plasma plume is investigated as a function of the applied voltage or the gas flow rate. Results show that the excited electron temperature increases with decreasing applied voltage under the constant gas flow. Moreover, it increases with decreasing the gas flow under the constant voltage. Based on the discharge theory, these experimental phenomena are explained qualitatively. These results are of great importance to the development of atmospheric pressure uniform discharge plasma source and its application in industrial field.
- Published
- 2016
20. Study on Optimizing the Managerial Strategies of Municipal Sludge Treatment and Disposal in a City of Northern China
- Author
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Xiao Ming Bu, Qing Yi Meng, Jian Xin Xiong, Wen Zhong Li, Ji Yuan Li, and Jian Lv
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Engineering ,Wastewater ,Waste management ,business.industry ,Process (engineering) ,Sewage sludge treatment ,General Medicine ,business ,China ,Environmental planning - Abstract
A whole process chain managerial strategy is presented to solve the problems of sludge treatment and disposal of municipal wastewater treatment plants in a city of northern China. The problems include negligence of the sludge treatment, scarce capacity, ambiguous responsiblity, lack of whole process management and coherence of management on wastewater and sludge treatment. The system of whole process chain managerial strategy can provide a safe and effective platform to collect the relevant data about sludge disposal. In the system,all executants have the obligation and responsibility to record the data, supervise the operation and management of other subject, and give the report of the record data regularly. The system can be used to discover the problem in sludge disposal, and also it can give suggestion for the planning and adjust the ability of sludge disposal in a city for long-term.
- Published
- 2012
21. Adsorption Kinetics and Thermodynamics of Methyl Orange onto Surfactant-Modified Sepiolite
- Author
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Chang Ping Wang, Ji Yuan Li, Shan Hui Hong, Ya Jing Li, and Cai Lou Zhou
- Subjects
chemistry.chemical_compound ,Aqueous solution ,Adsorption ,chemistry ,Pulmonary surfactant ,Sepiolite ,Kinetics ,Inorganic chemistry ,Enthalpy ,General Engineering ,Methyl orange ,Thermodynamics ,Activation energy - Abstract
Organosepiolite has been prepared by exchanging with hexadecyltrimethylammonium bromide (CTAB) as a modifier. The adsorption kinetics and thermodynamics of methyl orange from aqueous solutions onto organosepiolite are studied, then the adsorption principle is discussed. The results of XRD and FTIR show that sepiolite can be well modified by treating with CTAB. The results indicate that the adsorption isotherm for methyl orange accords with the Langumir equation. The adsorption enthalpy and entropy changes are –13.54 kJ/mol and -32.8J/(mol•K), respectively. And the adsorption exhibits spontaneous physical adsorption and exothermic. The adsorption dynamics follows the laws of pseudo-second-order kinetics with the energy of activation is 6.36kJ/ mol.
- Published
- 2010
22. Mechanism and Performance Analysis of Easy-Cleaning Ceramics
- Author
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Xiu Hong Liang, Li Juan Wang, Ji Yuan Li, and Qing Guo Tang
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Materials science ,business.industry ,Glaze ,General Engineering ,Ceramic glaze ,law.invention ,Processing methods ,law ,visual_art ,visual_art.visual_art_medium ,Ceramic ,Composite material ,Process engineering ,business - Abstract
Developing easy cleaning and antibacterial ceramics is the key to actualize the ceramics with functionalized, high-quality and band established in china. This paper which combined with research status from home and broad analysed the performance influence of ceramic glaze with different processing methods and discussed the way and methods which can improve the quality of ceramics.
- Published
- 2010
23. The Coordination Structure of the Extracted Nickel(II) Complex with a Synergistic Mixture Containing Lix63 and Versatic10
- Author
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Shan, Zhu, primary, Hui-ping, Hu, additional, Ji-yuan, Li, additional, and Fang, Hu, additional
- Published
- 2017
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24. Effect of surface free energy of ceramic glaze on oil droplet shape and its behavior in water
- Author
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Junping Meng, Ji-yuan Li, Lijuan Wang, Jin Zhang, Jinsheng Liang, and Guangchuan Liang
- Subjects
Materials science ,Aggregate (composite) ,Metals and Alloys ,Geotechnical Engineering and Engineering Geology ,Condensed Matter Physics ,Surface energy ,Ceramic glaze ,law.invention ,Contact angle ,High surface ,law ,visual_art ,Oil droplet ,Materials Chemistry ,visual_art.visual_art_medium ,Polar ,Ceramic ,Composite material - Abstract
A super-hydrophilic functional ceramic was prepared by adjusting the chemical components of ceramic glaze. Effect of surface free energy of ceramic glaze on oil droplet shape and its behavior in water were studied. The results show that water can spread on ceramic surface with high surface free energy, and oil droplet can aggregate rapidly and separate from the ceramic surface in water. For the ceramic with lower surface free energy, the polar shares are dependant on its easy-cleaning property. The higher the polar shares, the better the easy-cleaning property, and the easier the droplet separates from the ceramic surface in water.
- Published
- 2006
25. [Population structure and spatial distribution pattern of Camellia azalea in E' huangzhang Nature Reserve of Guangdong, China]
- Author
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Xin-lei, Li, Zhen-yuan, Sun, Ji-yuan, Li, Yi, Xu, and Jian, Luo
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China ,Conservation of Natural Resources ,Spatial Analysis ,Population Dynamics ,Camellia - Abstract
This paper studied the structures of basal diameter, height and canopy width of Camellia azalea population in E' huangzhang Nature Reserve of Guangdong. The spatial distribution patterns and dynamics of the population were measured by applying aggregate indices including disperse coefficient, negative binomial distribution, Cassie index, clumping index, mean crowding, patch index and Green index. The results showed that in the natural distribution region, the population was mainly composed of adult trees, and was in declining due to seriously lack of seedlings. The structures of diameter, height and canopy width were not identical among different plots. In the plots, the spatial distribution pattern of C. azalea population showed clump or random, and changed from clump to random with the development of the population.
- Published
- 2014
26. A linear-field plasma jet for generating a brush-shaped laminar plume at atmospheric pressure
- Author
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Jingdi Chu, Ji-yuan Li, Panpan Zhang, Pengying Jia, and Xuechen Li
- Subjects
010302 applied physics ,Physics ,Plasma cleaning ,02 engineering and technology ,Plasma ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,humanities ,Plume ,Plasma torch ,0103 physical sciences ,Plasma pencil ,Plasma diagnostics ,Plasma channel ,Capacitively coupled plasma ,Atomic physics ,0210 nano-technology - Abstract
A linear-field plasma jet composed of line-to-plate electrodes is used to generate a large-scale brush-shaped plasma plume with flowing argon used as working gas. Through electrical measurement and fast photography, it is found that the plasma plume bridges the two electrodes for the discharge in the positive voltage half-cycle, which behaves like fast moving plasma bullets directed from the anode to the cathode. Compared with the positive discharge, the negative discharge only develops inside the nozzle and propagates much slower. Results also indicate that the gas temperature of the plume is close to room temperature, which is promising for biomedical application.
- Published
- 2016
27. [The secondary growth in plant and its molecular regulation]
- Author
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Qiong-Mei Xia, Ji-Yuan Li, and Min Tian
- Subjects
Genetics ,Regulation of gene expression ,chemistry.chemical_classification ,Indoleacetic Acids ,Secondary growth ,food and beverages ,Plant Development ,Cell Differentiation ,General Medicine ,Biology ,Plants ,chemistry ,Plant Growth Regulators ,Auxin ,Cell Wall ,Gene Expression Regulation, Plant ,Xylem ,Plant Cells ,Transcriptional regulation ,MYB ,Transcription factor ,Secondary cell wall ,Vascular tissue ,Forecasting ,Transcription Factors - Abstract
The secondary growth is a significant biological activity for plant development, and the secondary xylem (i.e. wood) plays an important role for human life. The secondary growth includes several consecutive processes such as vascular tissue differentiation, secondary cell wall deposition, lignification, PCD and heart wood formation. Considerable evidence indicated that auxin is the major signal involved in several aspects of the ontogeny of the vascular system. At the same time, a suite of putative transcription factors such as MYB, NAC, AP2/EREBP, homeobox and MADS have been implicated in the regulation of the secondary growth. The candidate genes in the signaling and transcriptional regulation which have been identified will assist future investigations to unravel the molecular mechanisms of secondary growth. The important aspect in secondary growth and the identification of regulatory genes were reviewed here.
- Published
- 2007
28. System analysis of full-field reflection-type three-dimensional angle-deviation microscope
- Author
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Ming-Hung Chiu, Chen-Tai Tan, and Ji-Yuan Li
- Subjects
Physics ,Microscope ,Observational error ,medicine.diagnostic_test ,business.industry ,Materials Science (miscellaneous) ,Magnification ,Industrial and Manufacturing Engineering ,Numerical aperture ,law.invention ,Optics ,Optical microscope ,Optical coherence tomography ,Deflection (engineering) ,law ,medicine ,Near-field scanning optical microscope ,Business and International Management ,business - Abstract
This study investigates the system errors found in full-field reflection-type three-dimensional angle-deviation microscopes. The microscope, which is based on the algorithm of reflectivity-height transformation, can be used to measure the 3D surface profile of a specimen in real time without scanning. The system error is made up of the errors caused by the optical components, light source, deflection direction of the test light, lack of focus, object length, magnification, and numerical aperture. The incorrect object location is the principal cause of height measurement error. However, the total error percentage is below 3.2%, and the lateral and axial resolutions are better than 0.5 μm and 1 nm, respectively, in the measuring range of 200 nm.
- Published
- 2015
29. Ultradian rhythms and the nutritional importance of caecotrophy in captive Brandt's voles (Lasiopodomys brandtii)
- Author
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Quansheng Liu, De-Hua Wang, and Ji-Yuan Li
- Subjects
Activity Cycles ,Male ,medicine.medical_specialty ,Physiology ,Nitrogen ,Biology ,Biochemistry ,Nutrient density ,Feces ,Endocrinology ,Nutrient ,Animal science ,Lasiopodomys brandtii ,Internal medicine ,medicine ,Ingestion ,Animals ,Body Size ,Defecation ,Cecum ,Ecology, Evolution, Behavior and Systematics ,Ultradian rhythm ,Ultradian Cycles ,Arvicolinae ,Dietary intake ,digestive, oral, and skin physiology ,Feeding Behavior ,biology.organism_classification ,Adaptation, Physiological ,Animal Science and Zoology ,Animal Nutritional Physiological Phenomena ,Female ,Energy Metabolism - Abstract
Ingestion of soft faeces derived from caecal contents, caecotrophy, in herbivorous small mammals is considered an adaptation to the metabolic disadvantage of small body size, especially when feeding on diets of low quality. We investigated daily activity patterns in captive Brandt's voles (Lasiopodomys brandtii), including feeding, locomotion, caecotrophy, and defaecation, by continuous 24 h visual observation; and estimated the contribution of soft faeces ingestion (caecotrophy) to intake of protein and energy. Brandt's voles ingested 68.8 +/- 7.4 fecal pellets per day, averaging 17 +/- 2% of total faeces produced. The amount of faeces ingested did not differ between female and male voles or between night and day time. All animals showed average 3 h ultradian cycles in behaviour during the course of the day and night. The contributions of caecotrophy to the dietary intake of crude protein and metabolizable energy were estimated respectively as 9 and 8% on a high-protein, easily digested commercial rabbit pellet diet. However, the importance of caecotrophy to the field voles is likely to be higher on a natural diet of lower nutrient density. The rhythm of caecotrophy in voles depended mainly on the rhythm of the colonic separation mechanism in the proximal colon and passage in the distal colon, and may be regulated by feeding and other activity rhythms. Ultradian rhythms in caecotrophy helped to minimise potential conflicts in utilizing the gut, especially in balancing the caecal fermentation and salvaging nutrients contained in caecal bacteria.
- Published
- 2006
30. The Coordination Structure of the Extracted Nickel( II) Complex with a Synergistic Mixture Containing Lix63 and Versatic10.
- Author
-
Shan, Zhu, Hui‐ping, Hu, Ji‐yuan, Li, and Fang, Hu
- Subjects
NICKEL ,SINGLE crystals ,SOLVENT extraction ,ISOBUTYRIC acid ,X-ray diffraction - Abstract
In the present work, the nickel( II) synergist complex with isobutyric acid ( HL
I ) and 5-hydroxy-4-octanone oxime ( HBI ), which were the corresponding short-chain analogs of the active synergistic mixture of Versatic10 ( HL) and Lix63 (5,8-diethyl-7-hydroxy-6-dodecanoneoxime, HB), was prepared and studied by single-crystal X-ray diffraction ( XRD). The crystal structure of the nickel( II) synergist complex showed that the composition of the complex was Ni( LI )2 ( HBI )2 with a cis-form octahedron geometry structure. Both intra- and intermolecular hydrogen bonding were observed in the crystal lattice. Compared with the free ligands, similar band shifts of Fourier transform infrared ( FT-IR) spectra assigned to the stretching vibration of carbon-oxygen single bond (CO), the stretching vibration of carbon-nitrogen double bond (CN), and the disappearance of the scissoring vibration of α-hydroxy ( OH) were correspondingly found in both the nickel( II) synergist complex and the extracted nickel( II) complex in the nonpolar organic phase. Combined with the results from ESI-MS, XRD, and slope analysis, it was concluded that the major species of the extracted nickel( II) complex in the nonpolar organic phase might possess a similar coordination structure [Ni( HB)2 (L)2 ] as the nickel( II) synergist complex, along with the neutral complex [Ni( HB)(B)2 ]. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
31. A Pulsing Argon Plasma Plume Excited by a Direct-Current Voltage
- Author
-
Wenting Bao, Xuechen Li, Pengying Jia, Chunyan Zhang, and Ji-yuan Li
- Subjects
Jet (fluid) ,Materials science ,Argon ,Direct current ,Nozzle ,General Physics and Astronomy ,chemistry.chemical_element ,Plasma ,Plume ,chemistry ,Physics::Plasma Physics ,Plasma pencil ,Electrical measurements ,Atomic physics - Abstract
In this study, by using a plasma jet driven by a direct-current voltage, a plasma plume can be generated in ambient air with argon used as the working gas. Through optical and electrical measurements, it is found that the plume discharge is pulsed despite the application of a direct-current voltage. The pulse frequency is investigated as a function of the sustaining voltage across the two electrodes and the gas flow rate. Differently from those of ordinary jets that usually operate in the bullet or continuous mode, the discharges of the direct-current jet almost volley at the same moment, while the quenching of the discharges propagates away from the jet nozzle.
- Published
- 2014
32. Corrigendum to 'Genetic diversity of Camellia japonica (Theaceae), a species endangered to East Asia, detected by inter-simple sequence repeat (ISSR)' [Biochem. Syst. Ecol. 50 (2013) 199–206]
- Author
-
Zhong-Yi Hu, Li Lin, Ying-Xiong Qiu, Ji-Yuan Li, and Sui Ni
- Subjects
Genetic diversity ,Camellia japonica ,biology ,Botany ,Endangered species ,East Asia ,Theaceae ,biology.organism_classification ,Sequence repeat ,Biochemistry ,Ecology, Evolution, Behavior and Systematics - Published
- 2014
33. Effect of extrusion on isoflavone content and antiproliferative bioactivity of soy/corn mixtures
- Author
-
Ji Yuan Li, Symon M. Mahungu, Keith W. Singletary, and James F. Faller
- Subjects
chemistry.chemical_classification ,Plant Extracts ,Flavonoid ,Daidzein ,food and beverages ,Genistein ,Biological activity ,General Chemistry ,Isoflavones ,Zea mays ,In vitro ,chemistry.chemical_compound ,chemistry ,Biochemistry ,Tumor Cells, Cultured ,Humans ,Extrusion ,Soybeans ,skin and connective tissue diseases ,General Agricultural and Biological Sciences ,Soy protein ,Cell Division - Abstract
The present studies were conducted to determine changes in the quantities of select isoflavones and in the bioactivity (ability to inhibit proliferation of human breast cancer cell lines) of extracts from blends of soy protein and cornmeal during extrusion processing. The extrusion of samples resulted in an average 24% decrease in the concentration of total isoflavones for all samples. Although the amounts of specific genistein-derived and daidzein-derived forms changed following extrusion, the content of the aglycones genistein and daidzein per g sample generally did not change. The extrusion of samples generally resulted in decreased antiproliferative action toward breast cancer cells, although antiproliferative activity was not eliminated. Therefore, extrusion of soy protein/cornmeal-containing foods are likely to retain a considerable portion of their isoflavone content and some of the health benefits associated with soy.
- Published
- 2000
34. Ultradian rhythms and the nutritional importance of caecotrophy in captive Brandt’s voles ( Lasiopodomys brandtii).
- Author
-
Quan-Sheng Liu, Ji-Yuan Li, and De-Hua Wang
- Subjects
- *
ULTRADIAN rhythms , *BIOLOGICAL rhythms , *VOLES , *MAMMALS , *BEHAVIOR - Abstract
Ingestion of soft faeces derived from caecal contents, caecotrophy, in herbivorous small mammals is considered an adaptation to the metabolic disadvantage of small body size, especially when feeding on diets of low quality. We investigated daily activity patterns in captive Brandt’s voles ( Lasiopodomys brandtii), including feeding, locomotion, caecotrophy, and defaecation, by continuous 24 h visual observation; and estimated the contribution of soft faeces ingestion (caecotrophy) to intake of protein and energy. Brandt’s voles ingested 68.8 ± 7.4 fecal pellets per day, averaging 17 ± 2% of total faeces produced. The amount of faeces ingested did not differ between female and male voles or between night and day time. All animals showed average 3 h ultradian cycles in behaviour during the course of the day and night. The contributions of caecotrophy to the dietary intake of crude protein and metabolizable energy were estimated respectively as 9 and 8% on a high-protein, easily digested commercial rabbit pellet diet. However, the importance of caecotrophy to the field voles is likely to be higher on a natural diet of lower nutrient density. The rhythm of caecotrophy in voles depended mainly on the rhythm of the colonic separation mechanism in the proximal colon and passage in the distal colon, and may be regulated by feeding and other activity rhythms. Ultradian rhythms in caecotrophy helped to minimise potential conflicts in utilizing the gut, especially in balancing the caecal fermentation and salvaging nutrients contained in caecal bacteria. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
- View/download PDF
35. Cantharidin Impedes Activity of Glutathione S-Transferase in the Midgut of Helicoverpa armigera Hübner
- Author
-
Ya Lin Zhang, Dun Wang, Maryam Rashid, Ji Yuan Liu, and Rashid Ahmed Khan
- Subjects
glutathione S-transferases ,Helicoverpa armigera ,cantharidin ,mRNA ,molecular docking simulations ,Biology (General) ,QH301-705.5 ,Chemistry ,QD1-999 - Abstract
Previous investigations have implicated glutathione S-transferases (GSTs) as one of the major reasons for insecticide resistance. Therefore, effectiveness of new candidate compounds depends on their ability to inhibit GSTs to prevent metabolic detoxification by insects. Cantharidin, a terpenoid compound of insect origin, has been developed as a bio-pesticide in China, and proves highly toxic to a wide range of insects, especially lepidopteran. In the present study, we test cantharidin as a model compound for its toxicity, effects on the mRNA transcription of a model Helicoverpa armigera glutathione S-transferase gene (HaGST) and also for its putative inhibitory effect on the catalytic activity of GSTs, both in vivo and in vitro in Helicoverpa armigera, employing molecular and biochemical methods. Bioassay results showed that cantharidin was highly toxic to H. armigera. Real-time qPCR showed down-regulation of the HaGST at the mRNA transcript ranging from 2.5 to 12.5 folds while biochemical assays showed in vivo inhibition of GSTs in midgut and in vitro inhibition of rHaGST. Binding of cantharidin to HaGST was rationalized by homology and molecular docking simulations using a model GST (1PN9) as a template structure. Molecular docking simulations also confirmed accurate docking of the cantharidin molecule to the active site of HaGST impeding its catalytic activity.
- Published
- 2013
- Full Text
- View/download PDF
36. Effects of Deltamethrin and Endosulfan on the Population Growth of Brachionus calyciflorus at Different Algal (Scenedesmus obliquus) Densities.
- Author
-
Xiao-Ping Xu, Yi-Long Xi, and Ji-Yuan Li
- Subjects
- *
DELTAMETHRIN , *ENDOSULFAN , *BRACHIONUS , *SCENEDESMUS obliquus , *ENVIRONMENTAL protection - Abstract
The chronic effects of deltamethrin and endosulfan on non-target organisms have been investigated several times. However, most of these studies were only performed under certain environmental conditions and ignored the effects of food density. In the present study, the effects of deltamethrin (0.3, 0.6, 1.2, and 2.4 mg/L) and endosulfan (0.27, 0.54, 1.08, and 2.16 mg/L) on the population growth of the rotifer Brachionus calyciflorus were investigated at two densities of Scenedesmus obliquus (1.0×106 and 3.0×106 cells/mL). Compared with the blank control, high levels of deltamethrin and endosulfan significantly decreased the population growth rate and the maximum population density of B. calyciflorus, suggesting that these two chemicals are toxic to rotifers. In comparison to high algal density, the toxic effects of 2.4 mg/L deltamethrin and 2.16 mg/L endosulfan on rotifers were much more obvious at low algal density. The present results show the important role of algal density on influencing the toxicities of deltamethrin and endosulfan to rotifers. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
37. Postoperative Cognitive Dysfunction Induced by Different Surgical Methods and Its Risk Factors.
- Author
-
GUO-LIANG GONG, BIN LIU, JIA-XUAN WU, JI-YUAN LI, BAI-QING SHU, and ZHI-JIAN YOU
- Subjects
- *
COGNITION disorders , *ABDOMINAL surgery , *COGNITIVE ability , *TYMPANIC membrane , *HYPOTHERMIA - Abstract
The aim of the present study was to compare the effect of different surgical methods on postoperative cognitive function in patients undergoing abdominal surgery, determine the risk factors of postoperative cognitive dysfunction (POCD) by logistic regression, and investigate these risk factors through different surgical methods. A total of 70 patients undergoing selective abdominal surgery were selected into this study. The age of these patients ranged within 32 to 85 years. The cognitive function of these patients was assessed by themini-mental state examination at one day before the operation, and at the first and seventh day after the operation. The temperature of the tympanic membrane, PETCO2 values, visual analogue scale scores, educational level, and operation time were recorded. Logistic regression analysis was used to analyze related factors of POCD. The incidence rate of perioperative hypothermia in groups O and L were 31.2 and 10.5 per cent, respectively; and the difference was statistically significant (P < 0.05). The difference in visual analogue scale scores at the first and seventh day after the operation between these two groups were statistically significant (P < 0.01). The incidence of POCD in group O was significantly higher than that in group L at the first and seventh day after the operation (P < 0.05). According to logistic regression results, it was found that age, perioperative hypothermia, and postoperative pain were risk factors of POCD. The difference in POCD for the patients undergoing abdominal surgery through different surgical methods was statistically significant, and this was closely correlated to perioperative hypothermia and postoperative pain. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
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