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3. Vanillin, a Newly Discovered Autotoxic Substance in Long-Term Potato Continuous Cropping Soil, Inhibits Plant Growth by Decreasing the Root Auxin Content and Reducing Adventitious Root Numbers

Author

Ma, Haiyan, primary, Li, Junji, additional, Luo, Aihua, additional, Lv, Heping, additional, Ren, Zhitong, additional, Yang, Hongkun, additional, Fang, Xiaoting, additional, Shahzad, Muhammad Amir, additional, Qu, Huijuan, additional, Zhang, Kaiqin, additional, Wang, Qiang, additional, and Zheng, Shunlin, additional

Published
2023
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4. International Student Engagement in American Higher Education: Perspectives of International Students toward Services Provided by the Office of International Services

Author

Qu, Huijuan

Abstract

The variety of international students increases the diversity and complexity of higher education in the United States, known by the feature of multiculturalism (Chow, 2014). The benefits and challenges from this trend are too valuable to be neglected. In terms of benefits, international students gain the chance to have advanced Western higher education; whereas, institutions acquire a more diverse community and receive money for operations. On the other hand, one of the major challenges of the staff members and the international student is clarity of communication to assure that the students' needs are being met. Staff in student affairs is expected to gain the multicultural competence to serve international students and engage students to help them succeed in American campuses. However, on the institutional level, there is a gap in understanding and evaluating the level of international student engagement. As a case study in an American higher education institution, this project is designed to examine the effectiveness of international student engagement through the perspectives of international college students. The data are garnered from students via electronic surveys and follow up semi-structured face-to-face interviews with purposefully selected eight international students. In the first, the quantitative phase finds that most international students are satisfied with the services provided by the Office of International Services at a relatively high engagement level. Then, the follow up qualitative analysis exposes international students' dissatisfaction on the aspects of English language difficulties, sociocultural/social issues, and career development issues. The survey and interview findings from both quantitative and qualitative phases are discussed with references to previous studies, and the results are expected to benefit the international students, staff members, scholars, and higher education institutions in developing international student programs that strengthen support systems and encourage international student engagement. Finally, practical recommendations are provided for related stakeholders. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]

Published
2018

5. Mechanisms of action of periodontitis on accelerating atherosclerosis.

Author

LI Hua, QU Huijuan, MENG Xin, ZHANG Xueying, SUN Minmin, GUO Shoudong, and JI Honghai

Subjects
*ATHEROSCLEROSIS, *PATHOLOGICAL physiology, *PERIODONTITIS, *CARDIOVASCULAR diseases
Abstract

Periodontitis, a common disease, is considered to be closely associated with many systemic diseases, especially cardiovascular disease. Atherosclerosis is the basic pathological change of cardiovascular disease, and recent evidence has indicated that periodontitis promotes the onset and progression of atherosclerosis. This article reviews the roles of periodontitis in accelerating atherosclerosis and highlights the involved mechanisms to provide new strategies for diagnosis and treatment of atherosclerosis. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Gastric protective effect of Alpinia officinarum flavonoids: mediating TLR4/NF-κB and TRPV1 signalling pathways and gastric mucosal healing.

Author

Lin, Kaiwen, Deng, Tang, Qu, Huijuan, Ou, Hongya, Huang, Qifeng, Gao, Bingmiao, Li, Xiaoliang, and Wei, Na

Subjects
CELLULAR signal transduction, TRPV cation channels, ALPINIA, HEALING, GASTRIC mucosa, CELL migration
Abstract

Our previous studies have found that total flavonoid of Alpinia officinarum Hance (Zingiberaceae) (F.AOH) had protective effects on gastric ulcer (GU). To investigate the protective mechanism of F.AOH on acetic acid-induced chronic GUs in rats and ethanol-induced GES-1 cells damage. In vivo: Gastric damage was induced in SD rats by administering acetic acid after oral treatment with F-AOH at 54, 27 and 13.5 mg/kg (2 weeks of continuous gavage). After a comprehensive evaluation of rats' serum and gastric tissue-related indicators, gene transcriptome sequencing, qPCR and Western blotting were used to investigate the mechanism further. In vivo: GES-1 cells were incubated with F-AOH (8, 4 and 2 μg/mL) for 16 h and treated with 7% ethanol for 4 h. Transwell and flow cytometry were employed to detect migration and apoptosis of cells. F.AOH effectively reduced the area of GUs in rats (from 11.2 ± 1.89 to 2.19 ± 0.95), reversing ethanol-induced cells apoptosis (from 23 ± 1.3 to 8.11 ± 0.93%). It also inhibited the expression of endothelin-1 (ET-1) and iNOS proteins, decreasing the levels of TNF-α IL-6 in serum, improving oxidative stress levels and increasing the expression of Bcl-2/Bax dimer genes. In addition, 4005 differentially expressed genes between the acetic acid model and the drug groups. Through experimental verification, F.AOH can inhibit the activation of TLR4/NF-κB signalling pathway and TRPV1 receptor. F.AOH, as an effective gastric protective plant component, had potential therapeutic value in anti-inflammatory pain and antioxidative stress gastrointestinal diseases. [ABSTRACT FROM AUTHOR]

Published
2023
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11. Genome-wide genetic diversity detection and population structure analysis in sweetpotato (Ipomoea batatas) using RAD-seq

Author

Qu Huijuan, Jianwei Li, Feng Junyan, Yang Lin, Zhao Shan, Zhang Cong, Pu Zhigang, Qing Li, and Li Ming

Subjects
0106 biological sciences, Genetics, 0303 health sciences, Genetic diversity, Polymorphism, Genetic, Breeding program, food and beverages, Sequence Analysis, DNA, Biology, 01 natural sciences, Genome, Genetic analysis, DNA sequencing, Plant Breeding, 03 medical and health sciences, Genotype, Genetic structure, Ipomoea batatas, DNA microarray, Genome, Plant, Microsatellite Repeats, 030304 developmental biology, 010606 plant biology & botany
Abstract

Sweetpotato (Ipomoea batatas L.) is one of the most important food and grain-forage crops globally. It has been planted in >100 countries. Due to the complexity of the sweetpotato genome, its research is far behind other major food crops. At present, limited information about the sweetpotato genome is available. Thus, it is central to find an efficient approach for the investigation of sweetpotato genome. In this study, RAD-seq (Restriction site-associated DNA sequencing) was used to evaluate sweetpotato genetic structure diversity and to develop relevant SSR markers. The study yielded >128 Gb reliable sequence data from 81 sweetpotato accessions. By analyzing polymorphic tags from each accession, a total of 55,622 restriction-site associated DNA sequencing tags (RAD-seq) were found, containing 907,010 SNP. Genetic analysis divided 81 accessions into five major clusters based on their SNP genotype, which matches the results of genetic analysis and the genetic family tree. In addition, 18,320 SSRs loci were detected and 9336 SSR primer pairs were developed. Eighty-three primer pairs were amplified in different sweetpotato genotypes, 76 of which successfully amplified polymorphism bands. These results provide significant information about sweetpotato genome, which can be used to identify novel gene and to further develop the gene chip. And more significant, clustering results based on the SNP genotype provide an essential reference for breeders to match parent plants in breeding program. Additionally, SSR markers developed in this study will supply a wealth of markers for marker-assisted selection in sweetpotato breeding.

Published
2020

16. Effects of Plant Density and Seeding Date on Accumulation and Translocation of Dry Matter and Nitrogen in Winter Wheat Cultivar Lankao Aizao 8

Author

Wei FengZhen, Shen XueShan, Wang ChengYu, Qu HuiJuan, Li JinCai, and Zhi Sheng-Jun

Subjects
Starch, Crop yield, Plant density, chemistry.chemical_element, Chromosomal translocation, Plant Science, Biology, Nitrogen, chemistry.chemical_compound, Agronomy, chemistry, Seeding, Dry matter, Cultivar, Agronomy and Crop Science, Biotechnology
Published
2009

17. Effects of the diphenylheptane extract of Alpinia officinarum rhizomes on ethanol-induced gastric ulcers in mice.

Author

Lin K, Qu H, Tan Y, Deng T, Gao B, and Wei N

Abstract

Objectives: Experimental studies have revealed that Alpinia officinarum Hance (Zingiberaceae) exhibits a gastrointestinal protective effect. The present study aimed to investigate the effects of diphenylheptanes (DPHs) extracted from A. officinarum rhizomes on ethanol-induced gastric ulcers in BALB/c mice., Materials and Methods: A total of 60 female BALB/c mice were divided into six groups as follows: negative control, which received sodium carboxymethyl cellulose; positive control, which received ethanol; treatment control, which received ethanol+ranitidine; ethanol+high dose of DPHs; ethanol+medium dose of DPHs; ethanol+low dose of DPHs. Different doses of DPHs were administered orally once daily for seven consecutive days before the animals were subjected to ethanol-induced gastric ulcers., Results: Various doses of DPHs significantly reduced Gastric ulcers index when compared with the positive control. DPHs treatments and treatment control increased the activity of superoxide dismutase; decreased the levels of inflammatory mediators, malondialdehyde, motilin, and gastrin; decreased the activity of inducible nitric oxide synthase and cyclooxygenase-2; and inhibited the expression of Toll-like receptor 4, myeloid differentiation factor 88, and nuclear factor-κB at the protein and mRNA levels. In addition, DPHs inhibited the expression of transient receptor potential vanilloid 1, calcitonin gene-related peptide, and increased the expression of substance P at the protein and mRNA levels., Conclusion: The protective effect of DPHs extracted from A. officinarum rhizomes against ethanol-induced gastric damages in mice suggests that the extract can be used as an auxiliary supplement for the prevention and treatment of gastric ulcers., Competing Interests: There are no conflicts of interest in this article.

Published
2021
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