Determination of diallyl disulfide in garlic by reversed-phase high performance liquid chromatography

Xiaolong Wan(만효룡),Yulia Polyakova,Kyung Ho Row(노경호) 한국분석과학회 2007 분석과학 Vol.20 No.5

Across-fault distributions of radon concentrations in soil gas for different tectonic environments

Xiaolong Sun,Pengtao Yang,Yang Xiang,Xueyun Si,Dongying Liu 한국지질과학협의회 2018 Geosciences Journal Vol.22 No.2

The radon concentration in soil gas at the crustal surface is closely related to the development of local fractures. Therefore, the spatial variation in soil-gas radon concentrations across faults differs between fault zones located in different tectonic environments. This study investigates the Beiluntai thrust fault and the Haiyuan strike-slip fault in west China, which are assumed to be typical examples of the different types of faults. Radon concentrations in soil gas were measured at various locations around these faults, and the spatial variation in these concentrations was characterized along fault-perpendicular profiles. For normal fault, our results indicate that concentrations are usually highest at the fault, and decrease gradually away from the fault in either direction. For thrust, however, concentrations increase in the hanging wall approaching the fault, but decrease sharply at the fault. For strike-slip fault with extension across the fault, soil-gas radon concentrations are relatively high at the fault, and decrease gradually with distance from the fault. For strike-slip fault with contraction across the fault, soil-gas radon concentrations are relatively low at the fault, and increase gradually with distance from the fault.

Mass trapping of apple leafminer, Phyllonorycter ringoniella with sex pheromone traps in apple orchards

Xiaolong Li,Shubao Geng,Hanjie Chen,정철의,Chunliang Wang,Hongtao Tu,Jinyong Zhang 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.1

The apple leafminer, Phyllonorycter ringoniella Matsumura (Lepidoptera: Gracillariidae), is an important insect pest of apple, with four to six generations a year in Korea, Japan, and China. The effect of mass trapping with sex pheromone traps on P. ringoniellawas investigated in apple orchards in 2015 in Yinchuan, China. Trap density treatments were 0, 75, 150, and 225/ha in the Control, T1, T2, and T3 orchard blocks, respectively. Average numbers of male catches permonitoring trapwere significantly lower in T2 and T3 treatments and highest in the control. Control efficiencies estimated fromthe leaf damage were 86.67±4.71, 97.23±3.93, and 100% in T1, T2, and T3, respectively. Significant within-tree migration of the moths from the lower part to the upper part was indicated by the shift of trap catches from lower (1–2 m high) to upper portions (3 m high) of the tree from early August. Mass trapping with sex pheromone traps can be one effective and environmentally friendly method to reduce the P. ringoniella populations in apple orchards. Trap density of 150/ha and hanging at 2 m height was recommended for growers to control and monitor its population, respectively

Prediction of tectonic fractures in coal reservoirs using geomechanical method

Xiaolong Fu,Junsheng Dai,Jianwei Feng 한국지질과학협의회 2018 Geosciences Journal Vol.22 No.4

Coalbed methane (CBM) resources are one of the most important and broadly developed unconventional resources. Considering the particularity of the coal, an adapted geomechanical method involving elastic-plastic deformation is badly needed to calculate the fracture parameters of the coal reservoir. Based on the rock mechanics experiments and three-dimensional μCT scan, the fracture evolution of coals can be summed up to initial compaction, propagation and coalescence stage. The microfractures will rapidly connect to each other when reaching 85% peak strength. Based on the plenty of measurement data, the relationship between fracture volume density and stress-strain of coals is established, and the acquisition of the quantitative geomechanical models made it possible to characterize fracture parameters after various tectonic movements under different stress state. Furtherly, the preparation of procedural language for the finite element (FE) simulation platform made it more popular and effective in the prediction of the generation of fractures and spatial distribution. The simulated results of No. 3 coal seam of Shizhuangbei area, both of the fracture density and direction, were in agreement with field observation results, which can be a compelling evidence for the effectiveness of the method.

Genome‑wide analysis of LATERAL ORGAN BOUNDARIES DOMAIN‑in Physcomitrella patens and stress responses

Xiaolong Huang,Huiqing Yan,Yanjing Liu,Yin Yi 한국유전학회 2020 Genes & Genomics Vol.42 No.6

Background LBDs, as the plant-specific gene family, play essential roles in lateral organ development, plant regeneration, as well as abiotic stress and pathogen response. However, the number and characteristic of LBD genes in Pyscomitrella patens were still obscure. Objective This study was performed to identify the LBD family gene in moss and to determine the expression profiles of LBDs under the abiotic and pathogen stress. Methods Complete genome sequences and transcriptomes of P. patens were downloaded from the Ensembl plant database. The hidden Markov model-based profile of the conserved LOB domain was submitted as a query to identify all potential LOB domain sequences with HMMER software. Expression profiles of PpLBDs were obtained based on the GEO public database and qRT-PCR analysis. Results In this study, a total of 31 LBDs were identified in the P. patens genome, divided into two classes based on the presence of the leucine zipper-like coiled-coil motif. A phylogenetic relationship was obtained between 31 proteins from P. patens and 43 proteins from the Arabidopsis thaliana genome, providing insights into their conserved and potential functions. Furthermore, the exon–intron organization of each PpLBD were analyzed. All PpLBD contain the conserved DNA binding motif (CX2CX6CX3C zinc finger-like motif), and were predicted to be located in cell nuclear. The 31 PpLBD genes were unevenly assigned to 18 out of 27 chromosomes based on the physical positions. Among these genes, PpLBD27 was not only remarkably highest expressed in desiccation, but also a susceptible gene to pathogens through jasmonic acid-mediated signaling pathway. Most of PpLBDs were up-regulated with the treatment of mannitol. These results showed they were differentially induced and their potential functions in the environmental stimulus of the early terrestrial colonizers. Conclusion Despite significant differences in the life cycle in P. patens and flowering plants, their functions involved in abiotic and biotic stress-regulated by LBDs have been identified and appear to be conserved in the two lineages. These results provided a comprehensive analysis of PpLBDs and paved insights into studies aimed at a better understanding of PpLBDs.

Morphology and Electrochemical Behavior of Anodic Oxide Films of Ti in Aqueous H₃PO₄

Xiaolong ZHU,Kyo-Han KIM 대한치과재료학회 2000 대한치과기재학회 학술대회 Vol.2000 No.1

Utility and Collaborative Filtering-Based Evaluation Method

Xiaolong Zhu,Weidong Zhu,Shuai Ding 보안공학연구지원센터(IJUNESST) 2013 International Journal of u- and e- Service, Scienc Vol.6 No.4

Changes in groundwater level and temperature induced by distant earthquakes

Xiaolong Sun,Yaowei Liu 한국지질과학협의회 2012 Geosciences Journal Vol.16 No.3

We analyzed the co-seismic responses of groundwater level and temperature in the Tayuan Well, Beijing, China, induced by 85 distant earthquakes over the period from January 2004 to July 2009. The results show that the Tayuan Well records earthquakes worldwide and that the co-seismic response shows the following pattern: water-level oscillation, temperature decrease, oscillations stop, return to normal temperature. The amplitudes of changes in water level and temperature are related to the earthquake magnitude and the distance to the epicenter. We discuss the mechanisms of the decrease in water temperature during the period of oscillations in water level, and the mechanisms of the temperature increase subsequent to the cessation of oscillations. We also analyze the results of previous studies on co-seismic response mechanisms, and consider the mechanisms of gas escape, heat diffusion, and cold-water seepage. These mechanisms may have induced the decrease in water temperature recorded in the present study, and the subsequent return to normal temperatures was due to heat exchange between the well water and the surrounding wall rock

Comprehensive Evaluation of the Designing Scheme of Remote Students Practice Project by AHP Method

Xiaolong Chen 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.12

We fully study the various factor indexes involved, use the AHP to build an integrated-assessed mathematic model of hierarchy of good distinct and structure of high efficiency and calculate the weight assessment indicator of each hierarchy. This paper uses AHP to build the general objective function of the designing scheme of students practice property. By the statistical analysis of the tip of various property indexes of mass property data, we choose the corresponding subordinating degree functions in the fuzzy mathematic field to determine the appropriate subjection function, calculate the relevant degree of membership, and finally conduct the integrated assessment of mathematic model of the design of remote students practice system. The paper uses C# language in the developing environment of VS2010 to develop the fuzzy-comprehensive-assessment software system of the designing scheme of students, and, we also use the software to analysis the systematic reliability of this scheme by living example. Through this work, we could offer a scientific and rational theory of technology to students for the support of remote Students practice projects research department.

EFFECT OF LED LIGHT QUALITY ON THE PHOTOTAXIS AND LOCOMOTION BEHAVIOR OF Haliotis discus hannai

Xiaolong Gao,Mo Zhang,Jimeng Zheng,Xian Li,Liang Chi,Changbin Song,Ying Liu 한국수산과학회 양식분과 2015 한국수산과학회 양식분과 학술대회 Vol.2015 No.5