A successive ‘‘conversion-deposition” mechanism achieved by micro-crystalline Cu2O modified current collector for composite lithium anode

Yifei Cai,Bin Qin,Chun Li,Xiaoqing Si,Jian Cao,Xiaohang Zheng,LIANG QIAO,Junlei Qi 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-

Lithium (Li) metal is a promising material for high-energy–density batteries, but it is still plagued byobvious capacity degradation and low average Coulombic efficiency resulting from dendrite Li propagation. One main reason is the electro-mechanic coupled failure of plated Li on the current collector, whichcontributes to non-dense Li deposition on the anode. Transition metal oxides (TMOs) with a conversiontypemechanism have been used directly as the anode materials for lithium ion batteries, which demonstratedbetter electro-mechanical stability than metal Li. Herein, a successive ’’conversion-deposition’’mechanism is ingeniously developed to restrain the generation of dendritic Li. Specifically, a microcrystallineCu2O modified current collector was prepared, in which Li+ are sequentially inserted intoCu2O and deposited in the form of Li metal at successive low potential. A Li-Cu half-cell based on thehybrid mechanism sustains a high Coulombic efficiency of over 99.3 % in up to 800 cycles. This work ingeniouslyinhibits the generation of dendrite Li by incorporating conversion-type materials withdeposition-dissolution type metal Li, which contributes to a novel concept for the design of functionalcurrent collectors for composite Li anodes.

Gene cloning and functional analysis of yellow green leaf 3 (ygl3) gene during the whole-plant growth stage in rice

Xiaoqing Tian,Ying-Hua Ling,Li-kui Fang,Peng Du,Xian-Chun Sang,Fang-Ming Zhao,Yun-Feng Li,Rong Xie,Guang-Hua He 한국유전학회 2013 Genes & Genomics Vol.35 No.1

Chlorophyll is an important photosynthetic pigment in the process of photosynthesis in plants and photosynthetic bacteria. Genes involved in chlorophyll biosynthesis in Arabidopsis and photosynthetic bacteria have been well documented. In rice, however, these genes have not been fully annotated. In this paper, a yellow-green leaf gene, yellow green leaf3 (ygl3) was cloned and analyzed. ygl3 encodes magnesium chelation ChlD (D) subunit,a key enzyme for chlorophyll synthesis, resulting in a yellow-green leaf phenotype in all growth stages in rice. Expression content of ygl3 is highest in the leaf blades,followed by the leaf sheaths, while there is virtually no expression of the gene in the stems and seeds. The subcellular structure and protein content of the photosynthetic system of the ygl3 mutant were revealed by transmission electron microscopy, BN-PAGE, and western blotting. The results show that the mutation of the ygl3 gene indirectly leads to a decrease in the protein content of the photosynthetic system and severely obstructs the formation of granum thylakoids.

CircRNA circ_0067772 aggravates the malignant progression of cutaneous squamous cell carcinoma by regulating miR‑1238‑3p/ FOXG1 axis

Xiaoqing Li,Yinghui Kong,He Li,Manyuan Xu,Ming Jiang,Weiguo Sun,Suping Xu 한국유전학회 2021 Genes & Genomics Vol.43 No.5

Background Cutaneous squamous cell carcinoma (CSCC) is a severe malignancy derived from skin. Dysregulated circular RNAs (circRNAs) might play vital roles in tumor development. Objective Here, we aimed to explore the function of a novel circRNA circ_0067772 in CSCC. Methods Quantitative real-time PCR (qRT-PCR) or Western blot assay was performed to determine the expression of circ_0067772, microRNA (miR)-1238-3p and forkhead box protein G1 (FOXG1). Cell proliferation was assessed by Cell Counting Kit-8 (CCK-8) assay and colony formation assay. Transwell assay and wound healing assay were employed to examine cell metastasis. Flow cytometry was employed to monitor cell cycle and apoptosis. The target association between miR-1238-3p and circ_0067772 or FOXG1 was validated by dual-luciferase reporter assay. Moreover, role of circ_0067772 in vivo was investigated via xenograft model in nude mice. Results Circ_0067772 and FOXG1 were upregulated, while miR-1238-3p was downregulated in CSCC tissues and cells. Circ_0067772 knockdown conferred inhibitory efects on cell proliferation, migration and invasion of CSCC cells. MiR1238-3p served as a target of circ_0067772, whose silencing could reverse circ_0067772 knockdown-induced inhibitory impact on the malignant cellular behaviors. Circ_0067772 positively regulated FOXG1 expression by antagonizing miR1238-3p. Additionally, miR-1238-3p could repress CSCC cell proliferation, migration and invasion by targeting FOXG1. Also, circ_0067772 knockdown hindered CSCC tumor growth in vivo. Conclusion Our study identifed a novel oncogenic circRNA and the involvement of circ_0067772/miR-1238-3p/FOXG1 axis in CSCC development, providing a target for CSCC therapy.

Effects of Additives on Nutrients and Fermentation Quality of Alfalfa Silage

Xiaoqing Zhang,Qizhong Sun,Xingyou Li,Xiaoxia Li 한국초지조사료학회 2009 한국초지조사료학회 학술대회논문집 Vol.2009 No.08

Two-year-old, full flower aohan alfalfa (Medicaga sativa cv. aohan) was chosen to evaluate the silage effect by using different additives of Qingbao Ⅱ , Caihe and Yishengkang. Result indicated that additives increased CP content (P<0.05) and decreased CF, ADF and NDF content significantly (P<0.05). Lactic acid content in additives treatments were significantly higher (P<0.01) than control. These result showed that additives improved silage fermentation quality, reduced cellulose contents and improved silage nutritive value. Among three treatments, Caihe and Yishengkang were priority to Qingbao Ⅱ on the effect of promoting the desired lactic acid fermentation.

병자호란 직후 청사출래(淸使出來)와 정치외교적 의의

리샤오칭 ( Li¸ Xiaoqing ) 대구사학회 2021 대구사학 Vol.144 No.-

In this paper, by examining the purpose and the negotiation activities in Hanyang of Qing Dynasty’s Envoys dispatched to Joseon after the Manchu war of 1636(丙子胡亂), the political and diplomatic significance of the Qing Dynasty’s Sahaeng(使行) toward Joseon was investigated. After the Manchu war of 1636(丙子胡亂) Joseon requested an end to the Qing's request for conscription through Sahaeng(使行) in April and September 1637. In October 1637, the Qing dispatched an envoy to Joseon for the installation of King Injo without Joseon‘s resquest, and the Qing dynasty’s envoys negotiated with Joseon focusing on the issue of repatriation of Naturalized jurchen(向化人), Chinese(漢人), Joseon people who captured by the Qing tried to come back Joseon(走回人). The issue of repatriation was an important negotiation issue even in later Sahaeng(使行) toward Joseon. It can be said that in the relationship between the two countries the most urgent task of Joseon was the resolution of the issue of conscription. However, what the Qing dynasty considered important was the maintenance of hierarchical relationship with Joseon and the establishment of a Qing-centered international order. Besides exemption from conscription, Joseon's other concern is the return of the crown prince. In September 1637, Joseon requested the return of the crown prince , but was rejected by the Qing Dynasty. In February 1639, an envoy was sent with a request for the installation of the queen and crown prince, and it was also expected that the crown prince could return to Joseon through the installation of the crown prince. After that, Injo's illness also made it a reason to request the crown prince to return to Joseon. However, from Qing's point of view, the installation of the queen and the crown prince was a procedure that could settle a hierarchical relationship of Joseon and Qing Dynasty. It is for this reason that the Qing Dynasty mentioned the installation of Crown Prince before Joseon’s request. In November 1639, the Qing dynasty’s envoy who came for the monument of Samjeondo(삼전도비) stayed in Hanyang until December 5 and supervised the construction of the monument. All work was completed on December 8th. From the Qing point of view, the monument of Samjeondo was regarded as a symbolic space for the success of the Manchus and the victory of the war to Joseon. From the point of view of Joseon, it was the result of the defeat and a symbol of obedience to the Qing Dynasty. For the first time the Qing dynasty dispatched a envoy after the Manchu war of 1636(丙子胡亂), Joseon discussed the standard of treatment for the Qing dynasty’s envoy. At first, it was intended to use the rules of treatment for Tangcha(唐差), but it was implemented according to the rules of treatment for Ming dynasty’s envoys(明使). the Qing dynasty’s envoy dispatched this time seemed to be satisfied with the reception of Joseon. In October 1637, the reception to the Qing dynasty’s envoy dispatched for the installation of King Injo was the first step in making the reception of Qing dynasty’s envoys regular. In September 1639, the reception for Qing dynasty’s envoy who is named Mandaerhan is different from that of the previous treatment for Qing dynasty’s envoys. It was because Mandaerhan was a official temporarily dispatched(差官) who came to visit King Injo. Joseon viewed Mandaerhan as a official temporarily dispatched who came under the emperor's orders, but the lowest level department(접대소) was installed to entertain Mandaerhan. This is different from the case of the reception for officials who were temporarily dispatched and served the Ming emperor's orders. It can be said that this was influenced by the the reception for Jin dynasty’s envoys, and the antipathy towards Qing was reflected in the reception. The reception of Mandaerhan in September 1639 and Maputa in November 1639 is another point worth noting. King Injo did not go out for greeting the two envoys. In September, Mandaerhan was a official temporarily dispatched, so there was no need for Injo to greet according to the ceremonial regulations. However, it was a precedent that Injo did not greet envoy on the excuse of his illness from November 1639. Afterwards, Joseon recorded cases in which the king did not greet envoy and made it a custom. (Kyungpook National University / lixiaoqing0313@naver.com)

An Accurate Identification of Extended XML Tree Pattern for XQuery Language

Husheng Liao,Xiaoqing Li,Junpeng Chen 보안공학연구지원센터 2014 International Journal of Database Theory and Appli Vol.7 No.5

In order to utilize high-performance XML tree pattern query (TPQ) for implementing of XQuery language effectively, it is necessary to analysis the query plan and identify tree pattern from it. In this paper, we extend the functional intermediate language FXQL, which is used to implement XQuery language, with an extended XML generalized tree pattern representation (GTP++). Then, we propose an XML tree pattern identification approach, which is composed of a suit of query expression rewriting rules for extracting tree pattern and a GTP++ construction algorithm. Based on this approach, both explicit and implied propositional logic, various structural constraints and predicates can be extracted across nested query blocks in XQuery FLWOR expressions. The tree pattern identified by this approach is more holistic and precisely than previous methods. The approach expands the application of XML tree pattern query technology in the implementation of XQuery language. Experiments show its effectiveness and practicability.

A Formal Description of XML Tree Pattern Query for XQuery Language

Husheng Liao,Xiaoqing Li,Hang Su 보안공학연구지원센터 2014 International Journal of Database Theory and Appli Vol.7 No.5

In order to express tree pattern query in query plan and take advantage of formal method to analyze its behavioral characteristics, this paper present a formal description of tree pattern query based on functional language and denotational semantics. This description major focuses on behavior of a tree pattern query on matching against an eXtensible Markup Language (XML) document tree. First, we introduce a formal definition for a kind of extended generalized tree pattern (GTP++). Then we present a functional tree pattern description language (XTPL) for GTP++ and give its complete denotational semantics based on a novel data structure, named WTree, which efficiently organizes this typical XML data query results and provides flexible data access method. In the end, we present the formal semantics of identifying tree pattern from path expressions. By using formal methods, the semantics of tree pattern query is consistent and analyzable. As the core operation of XML query, this formal description can provide an initial step for analyzing the correctness of XML queries, and improves the reliability and robustness of query processing methods.

Efficient Public Verification on the Integrity of Multi-Owner Data in the Cloud

Boyang Wang,Hui Li,Xuefeng Liu,Fenghua Li,Xiaoqing Li 한국통신학회 2014 Journal of communications and networks Vol.16 No.6

Cloud computing enables users to easily store their dataand simply share data with others. Due to the security threats inan untrusted cloud, users are recommended to compute verificationmetadata, such as signatures, on their data to protect the integrity. Many mechanisms have been proposed to allow a publicverifier to efficiently audit cloud data integrity without receivingthe entire data from the cloud. However, to the best of our knowledge,none of them has considered about the efficiency of publicverification on multi-owner data, where each block in data issigned by multiple owners. In this paper, we propose a novel publicverification mechanism to audit the integrity of multi-ownerdata in an untrusted cloud by taking the advantage of multisignatures. With our mechanism, the verification time and storageoverhead of signatures on multi-owner data in the cloud are independentwith the number of owners. In addition, we demonstratethe security of our scheme with rigorous proofs. Compared to thestraightforward extension of previousmechanisms, ourmechanismshows a better performance in experiments.

Experimental and Modeling Studies on the Sorption Breakthrough Behaviors of Butanol from Aqueous Solution in a Fixed-bed of KA-I Resin

Xiaoqing Lin,Renjie Li,Qingshi Wen,Jinglan Wu,Jiansheng Fan,Xiaohong Jin,Wenbin Qian,Dong Liu,Xiaochun Chen,Yong Chen,Jingjing Xie,Jianxin Bai,Han-Jie Ying 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.2

Removal of biobutanol from acetone-butanolethanol (ABE) fermentation broth can be achieved by fixed-bed sorption by means of KA-I resin, and the relevant breakthrough curves would provide much valuable information to help design a continuous fixed-bed sorption process in field application. In the present study, the effects of several important design parameters, i.e., initial butanol concentration (Cf: 3.0 ~ 30.0 g/L), inlet flow rate (Qf: 0.5~ 5.5 mL/min) and adsorbent bed height (Z: 4.2 ~ 18.0 cm),on the adsorption breakthrough curves of KA-I resin in a fixed-bed column were investigated. It was found that the amount of adsorbed butanol at breakthrough point was increased with an increase in the value of Cf and Z; and with decrease in the value of Qf. However, the maximum sorption capacities of butanol at saturated point were basically unchanged. Three well-established fixed-bed adsorption models, namely Thomas, Yoon-Nelson and Adams-Bohart,were applied to predict the breakthrough curves and to determine the characteristic parameters of fixed-bed column,which are the basis for the process design at a real scale. Good agreement between the theoretical breakthrough curves and the experimental result were observed using Thomas and Yoon-Nelson models.

A Novel Video Stitching Method for Multi-Camera Surveillance Systems

( Xiaoqing Yin ),( Weili Li ),( Bin Wang ),( Yu Liu ),( Maojun Zhang ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.10

This paper proposes a novel video stitching method that improves real-time performance and visual quality of a multi-camera video surveillance system. A two-stage seam searching algorithm based on enhanced dynamic programming is proposed. It can obtain satisfactory result and achieve better real-time performance than traditional seam-searching methods. The experiments show that the computing time is reduced by 66.4% using the proposed algorithm compared with enhanced dynamic programming, while the seam-searching accuracy is maintained. A real-time local update scheme reduces the deformation effect caused by moving objects passing through the seam, and a seam-based local color transfer model is constructed and applied to achieve smooth transition in the overlapped area, and overcome the traditional pixel blending methods. The effectiveness of the proposed method is proved in the experiements.