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Article ; Online: Impact of nasal septal perforation on the airflow and air-conditioning characteristics of the nasal cavity.

Na, Yang / Kwon, Kyung Won / Jang, Yong Ju

2024 Volume 14, Issue 1, Page(s) 2337

Abstract: We investigated (1) how nasal septal perforations (NSPs) modify nasal airflow and air-conditioning characteristics and (2) how the modifications of nasal airflow are influenced by the size and location of the NSP. Computed tomography scans of 14 subjects ...

Abstract	We investigated (1) how nasal septal perforations (NSPs) modify nasal airflow and air-conditioning characteristics and (2) how the modifications of nasal airflow are influenced by the size and location of the NSP. Computed tomography scans of 14 subjects with NSPs were used to generate nasal cavity models. Virtual repair of NSPs was conducted to examine the sole effect of NSPs on airflow. The computational fluid dynamics technique was used to assess geometric and airflow parameters around the NSPs and in the nasopharynx. The net crossover airflow rate, the increased wall shear stress (WSS) and the surface water-vapor flux on the posterior surface of the NSPs were not correlated with the size of the perforation. After the virtual closure of the NSPs, the levels in relative humidity (RH), air temperature (AT) and nasal resistance did not improve significantly both in the choanae and nasopharynx. A geometric parameter associated with turbinate volume, the surface area-to-volume ratio (SAVR), was shown to be an important factor in the determination of the RH and AT, even in the presence of NSPs. The levels of RH and AT in the choanae and nasopharynx were more influenced by SAVR than the size and location of the NSPs.
MeSH term(s)	Humans ; Nasal Cavity/diagnostic imaging ; Nasal Septal Perforation ; Computer Simulation ; Respiratory Physiological Phenomena ; Turbinates ; Hydrodynamics
Language	English
Publishing date	2024-01-29
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-52755-4
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: A gradual path to mortality

Na Yang / Payel Sen

eLife, Vol

2022 Volume 11

Abstract: Many of the features associated with senescence appear steadily over time before cells stop dividing. ...

Abstract	Many of the features associated with senescence appear steadily over time before cells stop dividing.
Keywords	senescence ; replicative senescence ; epithelial to mesenchymal transition ; Medicine ; R ; Science ; Q ; Biology (General) ; QH301-705.5
Language	English
Publishing date	2022-03-01T00:00:00Z
Publisher	eLife Sciences Publications Ltd
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Public Willingness to Pay for Green Lifestyle in China

Jichao Geng / Na Yang / Wei Zhang / Li Yang

International Journal of Environmental Research and Public Health, Vol 20, Iss 2185, p

A Contingent Valuation Method Based on Integrated Model

2023 Volume 2185

Abstract: The purpose of this study was to note how people recognize the green lifestyle and how much extra money they are willing to pay for it. An integrated model based on the theory of planned behavior was constructed, and data on the willingness to pay (WTP) ... ...

Abstract	The purpose of this study was to note how people recognize the green lifestyle and how much extra money they are willing to pay for it. An integrated model based on the theory of planned behavior was constructed, and data on the willingness to pay (WTP) for green lifestyles of 1377 respondents in five cities in East China were measured and calculated using the double-bounded dichotomous choice contingent valuation method (DBDC) combined with interval regression analysis. The results showed that the respondents were willing to pay an extra 81.8 yuan, 52.5 yuan, 38.9 yuan, 53.2 yuan, and 37.2 yuan per month for green food, clothing, travel, housing, and waste recycling, respectively. Attitude and moral norms were the strongest predictors of WTP for green clothing, travel, housing, and waste recycling. Perceived behavior control, environmental awareness, personal habits, subjective knowledge, gender, income, and education can affect a few kinds of green lifestyle’s WTP.
Keywords	DBDC ; WTP ; integrated model ; green lifestyle ; carbon neutrality ; Medicine ; R
Subject code	710
Language	English
Publishing date	2023-01-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Performance and characterization of snail adhesive mucus as a bioflocculant against toxic Microcystis

Qin Peng / Xinyue Gong / Ruixin Jiang / Na Yang / Ruiting Chen / Binglin Dai / Rui Wang

Ecotoxicology and Environmental Safety, Vol 270, Iss , Pp 115921- (2024)

2024

Abstract: Toxic Microcystis blooms are widespread in aquatic bodies, posing major threats to aquatic and human life. Recently, bioflocculants have attracted considerable attention as a promising biomaterial for Microcystis management. In search of a novel organism ...

Abstract	Toxic Microcystis blooms are widespread in aquatic bodies, posing major threats to aquatic and human life. Recently, bioflocculants have attracted considerable attention as a promising biomaterial for Microcystis management. In search of a novel organism that can produce an efficient bioflocculant for controlling harmful algae sustainably, the native gastropod Cipangopaludina chinensis was co-cultured continuously with toxic Microcystis under different initial algal cell densities. The bioflocculation effect of snail mucus on toxic Microcystis, microcystin removal, and toxin accumulation in snails was investigated. In addition, the properties of the adhesive mucus were characterized using microscopic, X-ray diffraction, infrared spectroscopy, and polysaccharide and proteome analyses. Microcystis cells were captured and flocculated by the snail mucus; removal efficiencies of up to 89.9% and 84.8% were achieved for microalgae and microcystin-leucine arginine (MC-LR), respectively, when co-cultured with C. chinensis for only one day. After nine-day exposure, less than 5.49 µg/kg DW microcystins accumulated in the snails, indicating safety for human consumption. The snail mucus contained 104.3 µg/mg protein and 72.7 µg/mg carbohydrate, which provide several functional groups beneficial for Microcystis bioflocculation. The main monosaccharide subunits of polysaccharides are galactose, galactosamine, glucosamine, fucose, glucose, and mannose. Most of them are key components of polysaccharides in many bioflocculants. Gene Ontology analysis indicated the protein enrichment in binding processes and catalytic activity, which may account for Microcystis bioflocculation via protein binding or enzymatic reactions. The findings indicate that native C. chinensis secretes adhesive mucus that can act as bioflocculant for toxic Microcystis from ambient water and can be an effective and eco-friendly tool for Microcystis suppression.
Keywords	Microcystis aeruginosa ; Cipangopaludina chinensis ; Adhesive mucus ; Polysaccharide composition ; Proteome ; Environmental pollution ; TD172-193.5 ; Environmental sciences ; GE1-350
Subject code	570
Language	English
Publishing date	2024-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Online Education and Undergraduates’ Academic Record during the COVID-19 Pandemic in China

Jichao Geng / Shoukui Xun / Jian Yang / Na Yang

Sustainability, Vol 14, Iss 14070, p

Evidence from Large-Scale Data

2022 Volume 14070

Abstract: Digital technology-based online education is key to promoting high-quality development of higher education. Many studies have analyzed the effects of online education during the COVID-19 pandemic, but analyses based on large-scale data are lacking. This ... ...

Abstract	Digital technology-based online education is key to promoting high-quality development of higher education. Many studies have analyzed the effects of online education during the COVID-19 pandemic, but analyses based on large-scale data are lacking. This study uses a quasi-natural experiment during the COVID-19 pandemic to explore the short- and long-term relationships between emergency remote education (teaching and learning) and undergraduates’ academic record using multiple comparison analysis of variance (ANOVA) and multiple linear regression. The research data come from the academic record of 123,208 courses of 2622 undergraduates from the classes of 2017–2021 in a Chinese university, across nine semesters. The data do not satisfy the homogeneity of variance hypothesis test; therefore, a non-parametric test is adopted for hypothesis testing. The results show that: (1) In the online education semester, the students’ academic record improved substantially with low fluctuation and greater stability; (2) this improvement is more obvious for sophomores and juniors than for freshmen, and (3) online education during the pandemic period significantly improved the course scores of undergraduates, especially sophomores, in the following one or two semesters.
Keywords	online education ; undergraduates ; academic record ; large-scale data ; ANOVA ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Subject code	028
Language	English
Publishing date	2022-10-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Application of Deep Learning Algorithm in Web Page Advertising Design Style

Qing Deng / Ning Yang / Na Yang

Security and Communication Networks, Vol

2022 Volume 2022

Abstract: With the development of deep learning algorithm in Internet web pages and customers’ demand for web advertising design, different businesses begin to pay attention to web advertising design style. In order to predict and promote the development of web ... ...

Abstract	With the development of deep learning algorithm in Internet web pages and customers’ demand for web advertising design, different businesses begin to pay attention to web advertising design style. In order to predict and promote the development of web advertising design style, this paper studies the establishment process of web design model based on deep learning algorithm in detail. With the application of this model to the web advertising design of different businesses, this paper compares and analyzes the differences of web advertising design styles of different businesses and puts forward corresponding suggestions on web advertising design styles, which promotes the diversified development of web advertising design styles to a certain extent and has a good application effect.
Keywords	Technology (General) ; T1-995 ; Science (General) ; Q1-390
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Hindawi-Wiley
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Experimental and Numerical Studies on the Traditional Penetration Mortise–Tenon Connection Reinforced by Self-Tapping Screws

Ting Guo / Na Yang / Haibin Zhou / Shuangyong Wang

Forests, Vol 13, Iss 513, p

2022 Volume 513

Abstract: In this paper, the mechanical performance improvement of traditional penetration mortise–tenon (PMT) connections reinforced by self-tapping screws (STSs) were experimental and numerical studied. Four unreinforced penetration mortise–tenon connections and ...

Abstract	In this paper, the mechanical performance improvement of traditional penetration mortise–tenon (PMT) connections reinforced by self-tapping screws (STSs) were experimental and numerical studied. Four unreinforced penetration mortise–tenon connections and four STS-reinforced connections were experimentally investigated under monotonic and low-frequency cyclic loading. Besides, the numerical model of PMT connections reinforced by STSs with different diameters and yield strength were established and analyzed.Their failure modes, rotational stiffness, moment-resisting capacity, ductility, and seismic behavior were studied. The experimental results indicated that the STSs reinforcements could enhance the moment-resisting capacity of the penetration mortise–tenon connection. Compared with unreinforced connections, the initial stiffness of STS-reinforced connections increased by 75% with the moment-resisting capacity increasing by 69%, respectively. Furthermore, the STSs reinforcement method can effectively restrict the pull-out of tenon during the whole loading process. Numerical simulation results showed that the yield strength of STS has little effect on the moment-bearing behavior of the connection. The diameter of STS significantly influences the connection performance, and the diameter of 8 mm is suggested.
Keywords	penetration mortise–tenon connection ; Chinese fir ; reinforcement ; self-tapping screw ; monotonic loading ; cyclic loading ; Plant ecology ; QK900-989
Subject code	690
Language	English
Publishing date	2022-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Research on Interface Slip Characteristics of Heritage Composite Timber Columns under Inclined Deformation

Peng Chang / Qiuge Feng / Nannan Wu / Na Yang

Applied Sciences, Vol 12, Iss 14, p

2022 Volume 7351

Abstract: In order to study the mechanical performance and friction slip mechanism of the interface of a composite timber column under inclined deformation, the unilateral contact mechanical model of an ancient composite timber column under inclined deformation is ...

Abstract	In order to study the mechanical performance and friction slip mechanism of the interface of a composite timber column under inclined deformation, the unilateral contact mechanical model of an ancient composite timber column under inclined deformation is proposed in this paper. According to the limit of the inclination angle of slip point and the limit of the inclination angle of slip surface, the failure modes of the combination’s interface can be divided into three stages: the fully sticky stage, the partially sticky stage and the sliding stage. The theoretical results of the sliding displacement and shear stiffness of the combination’s interface under the effect of iron hoops were obtained by using the elastic mechanics method. Based on the shear sliding test of a composite timber column’s interface under the effect of iron hoops, the influences of different parameters on the shear sliding performance of the combination’s interface were investigated. The test results show that the number and the spacing of the iron hoops and the inclination angle of the interface are important factors affecting the shear strength of the combination’s interface. The shear strength of the interface increased with the increase in the number of iron hoops and the inclination angle of the interface. Since hoop spacing that is too large or too small cannot effectively improve the shear capacity of the interface, there is an optimal value for the hoop spacing.
Keywords	heritage timber structure ; composite timber column ; inclined deformation ; the effect of iron hoops ; the limit of the inclination angle of slip ; slip characteristics of an interface ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Subject code	690
Language	English
Publishing date	2022-07-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Dynamic characteristics of heat capacity of the human nasal cavity during a respiratory cycle.

Chung, Seung-Kyu / Na, Yang

Respiratory physiology & neurobiology

2021 Volume 290, Page(s) 103674

Abstract: The dynamic characteristics of air-conditioning in the human nasal cavity during a respiratory cycle were investigated using unsteady numerical simulations to assess whether inhaled air is sufficiently conditioned by the nasal cavity. Variations in the ... ...

Abstract	The dynamic characteristics of air-conditioning in the human nasal cavity during a respiratory cycle were investigated using unsteady numerical simulations to assess whether inhaled air is sufficiently conditioned by the nasal cavity. Variations in the epithelial surface temperature, surface heat, and water vapor fluxes were found to vary significantly during inspiration while providing substantial air conditioning to the inhaled air, but variations and magnitudes were significantly reduced during the expiration period. Air temperature (31.3-35.3 °C) and relative humidity (85.1-100 %) in the nasopharynx exhibited significant variations during inspiration. Flow rate-weighted average values of the air temperature and relative humidity during inspiration were estimated to be 32.0 °C and 89.1 %, respectively. Inhaled air did not attain alveolar conditions before reaching the nasopharynx, and was therefore thought to be insufficiently conditioned by the nasal cavity alone. A steady flow of approximately 250 mL/s appears to be useful for evaluating the accumulated thermal state of air in the nasopharynx during inspiration.
MeSH term(s)	Air ; Humans ; Humidity ; Inhalation/physiology ; Models, Anatomic ; Nasal Cavity/physiology ; Temperature
Language	English
Publishing date	2021-04-21
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2077867-3
ISSN	1878-1519 ; 1569-9048
ISSN (online)	1878-1519
ISSN	1569-9048
DOI	10.1016/j.resp.2021.103674
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Fabrication of a PVA-Based Hydrogel Microneedle Patch.

Oh, Na Gyeong / Hwang, Se Young / Na, Yang Ho

ACS omega

2022 Volume 7, Issue 29, Page(s) 25179–25185

Abstract: The degree of saponification, which is a dissolution characteristic of poly(vinyl alcohol) (PVA), is used to blend PVA to prepare a hydrogel microneedle (MN) patch. The MN patch was manufactured with an adjustable disassembly time using a molding process, ...

Abstract	The degree of saponification, which is a dissolution characteristic of poly(vinyl alcohol) (PVA), is used to blend PVA to prepare a hydrogel microneedle (MN) patch. The MN patch was manufactured with an adjustable disassembly time using a molding process, and it was confirmed to have morphological stability and excellent needle formation. The permeability of the gelatin sheet, which is analogous to the skin elasticity coefficient of a real human, was confirmed. The penetration ratio had a very high value of 100% and sufficient physical properties to penetrate the skin. In the disassembly experiment, the MN patch was produced with ratios of lower:higher saponification of 6:4 (PVA6), 7:3 (PVA7), 8:2 (PVA8), 9:1 (PVA9), and 10:0 (PVA10). Degradation did not occur for PVA6 and PVA7 but occurred for PVA8, PVA9, and PVA10. A cytotoxicity test to investigate its suitability for use in the human body confirmed the cell viability of 80% or more and nontoxic properties. Therefore, sufficient cell viability was confirmed when compared to the existing products.
Language	English
Publishing date	2022-07-14
Publishing country	United States
Document type	Journal Article
ISSN	2470-1343
ISSN (online)	2470-1343
DOI	10.1021/acsomega.2c01993
Database	MEDical Literature Analysis and Retrieval System OnLINE

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