The revisit intention of tourists has long been a focal point of academic inquiry. However, there is still insufficient research on the antecedents of revisit intention from the perspectives of historical storytelling, destination image and perceived value. Taking the Mogao Grottoes in Dunhuang, a UNESCO World Heritage Site, as a case study, this paper, based on stimulus-organism-response (SOR) theory, examines the impact of historical storytelling on the destination image, perceived value, and revisit intention.
View Article and Find Full Text PDFAngelica sinensis is a long-standing medicine used by Chinese medical practitioners and well-known for its blood-tonic and blood-activating effects. Ferulic acid, ligustilide, and eugenol in Angelica sinensis activate the blood circulation; however, the material basis of their blood-tonic effects needs to be further investigated. In this study, five homogeneous Angelica sinensis polysaccharides were isolated, and their sugar content, molecular weight, monosaccharide composition, and infrared characteristics determined.
View Article and Find Full Text PDFThe tourism network attention as a reflection of tourism demand is closely related to the tourism flow, the differences between the two has become an important criterion for judging the efficiency of destination tourism demand conversion, as well as a manifestation of the balance and coordination of destination tourism industry. Against the background of insufficient release of tourism demand in China, research on the development differences between tourism network attention and tourism flow can provide a basis for demand-side management and high-quality development. Based on the theory of spatial mismatch, this research analyzes the spatial development difference between the tourism network attention and the tourism flow in Shanghai from 2012 to 2021 using methods such as center of gravity model, spatial mismatch index, and two-dimensional combination matrix.
View Article and Find Full Text PDFis a wild strawberry species widely distributed in southwest China and has strong ecological adaptability. Akihime ( Duch. cv.
View Article and Find Full Text PDFChlorpyrifos (CPF) is the most common pesticide entering the food chain and posing a threat to human health. This study presents a new electrochemical biosensor based on molybdenum disulfide nanosheets and nitrogen-doped carbon dot nanocomposite (MoS@N-CDs) and kidney bean esterase (KdBE), and it is shown to achieve accurate detection of CPF. MoS@N-CDs were prepared by a facile solvothermal method and characterized by electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy.
View Article and Find Full Text PDFRed tourism is a distinctive form of tourism in China. Its network attention serves as a typical indicator to measure the level of promotion and publicity for red tourism, as well as an important reflection of its influence. Understanding the network structure of red tourism is of significant importance for optimizing the spatial pattern of tourism and promoting the development of the tourism industry.
View Article and Find Full Text PDFStrawberry (Fragaria × ananassa Duch.), a widely grown octoploid species, is one of the most important economic fruit crops and has been widely cultivated in the world, including China. In December 2021, a serious crown rot disease (approximately 50% incidence) was observed in strawberry (cultivar Miaoxiang) plantations in Qujing City, Yunnan Province, China.
View Article and Find Full Text PDFAnthracnose caused by spp. was widespread in recent years and resulted in great damage to strawberry production. Soil microbial communities were key contributors to host nutrition, development, and immunity; however, the difference between the microbial communities of healthy and anthracnose-infected strawberry rhizosphere soils remains unclear.
View Article and Find Full Text PDFPolymer gel is the most widely used plugging agent in profile control, whose formula and injected speed are very important process parameters. It is very significant to study the effect of shear rates on the dynamic gelation of polymer gel in porous media for selecting suitable formula and injection speed. Taking the phenol formaldehyde resin gel with static gelation time of 21 h in ampoule bottle as research objective, it was studied the dynamic gelation process and subsequent water flooding in porous media under different injected speeds by a circulated equipment.
View Article and Find Full Text PDFBacillus nematocida B16 has been shown to use "Trojan horse" mechanism in pathogenesis that has characteristics of "social" behavior. The ComP-ComA system, a conserved quorum sensing system in the genus Bacillus, functions in many physiological processes including competence development, lipopeptide antibiotic surfactin production, degradative enzyme production and even some unknown functions. Here we investigated the requirement of ComP-ComA system in B.
View Article and Find Full Text PDFProteases Bace16 and Bae16, an alkaline serine protease and a neutral protease, respectively, in the nematocidal bacterium Bacillus nematocida B16, have been identified as two key virulence factors and shown to have remarkable nematotoxic activities against the free-living nematode Panagrellus redivius and the plant parasite nematode Bursaphelenchus xylophilus. To facilitate the successful biological control application of this organism in the field, we genetically altered the strain B. nematocida B16 and optimized its growth condition to overexpress these two pathogenic proteases.
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