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Article ; Online: Inter-Comparison of Satellite-Based Sea Ice Concentration in the Amundsen Sea, Antarctica

Xueqi Li / Hailun He

Remote Sensing, Vol 15, Iss 24, p

2023 Volume 5695

Abstract: We conducted a comparison of sea ice concentration (SIC) in the Amundsen Sea using three satellite datasets: Hadley Centre’s sea ice and sea surface temperature (HadISST1), Operational Sea Surface Temperature and Ice Analysis (OSTIA), and Advanced ... ...

Abstract	We conducted a comparison of sea ice concentration (SIC) in the Amundsen Sea using three satellite datasets: Hadley Centre’s sea ice and sea surface temperature (HadISST1), Operational Sea Surface Temperature and Ice Analysis (OSTIA), and Advanced Microwave Scanning Radiometer 2 (AMSR2). HadISST1 has the longest time period, while AMSR2 has the shortest. In terms of grid resolution, HadISST1 has the coarsest resolution, while AMSR2 has the finest. The sea ice areas (SIAs) observed in HadISST1, OSTIA, and AMSR2 are similar. We studied the decadal variations in SICs by dividing the study period into four temporal segments. We investigated the differences between HadISST1 and OSTIA for each temporal segment. HadISST1 exhibited a more pronounced positive trend compared to OSTIA between 2005 and 2010. Additionally, we compared the interannual and seasonal variations in SICs between HadISST1 and OSTIA. Lastly, it should be noted that the Amundsen Sea polynya area varies across all three datasets.
Keywords	sea ice concentration ; Amundsen Sea ; polynya ; Science ; Q
Subject code	290
Language	English
Publishing date	2023-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Genome-Wide Identification, Characterization and Experimental Expression Analysis of CNGC Gene Family in Gossypium

Lei Chen / Wenwen Wang / Hailun He / Peng Yang / Xiaoting Sun / Zhengsheng Zhang

International Journal of Molecular Sciences, Vol 24, Iss 4617, p

2023 Volume 4617

Abstract: Cyclic nucleotide-gated ion channels (CNGCs) are channel proteins for calcium ions, and have been reported to play important roles in regulating survival and environmental response of various plants. However, little is known about how the CNGC family ... ...

Abstract	Cyclic nucleotide-gated ion channels (CNGCs) are channel proteins for calcium ions, and have been reported to play important roles in regulating survival and environmental response of various plants. However, little is known about how the CNGC family works in Gossypium . In this study, 173 CNGC genes, which were identified from two diploid and five tetraploid Gossypium species, were classified into four groups by phylogenetic analysis. The collinearity results demonstrated that CNGC genes are integrally conservative among Gossypium species, but four gene losses and three simple translocations were detected, which is beneficial to analyzing the evolution of CNGCs in Gossypium . The various cis-acting regulatory elements in the CNGCs’ upstream sequences revealed their possible functions in responding to multiple stimuli such as hormonal changes and abiotic stresses. In addition, expression levels of 14 CNGC genes changed significantly after being treated with various hormones. The findings in this study will contribute to understanding the function of the CNGC family in cotton, and lay a foundation for unraveling the molecular mechanism of cotton plants’ response to hormonal changes.
Keywords	Gossypium ; CNGC ; phylogenetic analysis ; oxidative stress ; hormones ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
Subject code	580 ; 572
Language	English
Publishing date	2023-02-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Enhanced Turbulent Mixing in the Upper Ocean Induced by Super Typhoon Goni (2015)

Mengtian Qiao / Anzhou Cao / Jinbao Song / Yunhe Pan / Hailun He

Remote Sensing, Vol 14, Iss 2300, p

2022 Volume 2300

Abstract: Based on the satellite-observed sea surface temperature (SST) data, high-resolution Argo observations and hybrid coordinate model (HYCOM) reanalysis results, this study examined the upper ocean response to Super Typhoon Goni in 2015 in the western north ... ...

Abstract	Based on the satellite-observed sea surface temperature (SST) data, high-resolution Argo observations and hybrid coordinate model (HYCOM) reanalysis results, this study examined the upper ocean response to Super Typhoon Goni in 2015 in the western north Pacific and revealed the significant diapycnal diffusivity enhancement in the upper ocean induced by Goni. Results indicate that the maximum SST cooling caused by Goni was 7.7 °C, which is greater than the SST cooling caused by most typhoons. The severe SST cooling was related to the enhancement of turbulent mixing induced by Goni. To the right of the typhoon track, the diapycnal diffusivity enhancement in the upper ocean caused by Goni could reach three orders of magnitude, from O (10 −5 m 2 /s) to O (10 −2 m 2 /s) and could last at least 9 days after the passage of Goni. In contrast, the diapycnal diffusivity to the left of the typhoon track did not show significant variations. The enhancement of turbulent mixing was found to be consistent with Goni-induced near-inertial kinetic energy calculated from the HYCOM reanalysis results, which suggests that the enhanced turbulent mixing was caused by Goni-induced near-inertial waves.
Keywords	turbulent mixing ; upper ocean response ; Super Typhoon Goni ; satellite observations ; sea surface temperature ; HYCOM reanalysis results ; Science ; Q
Subject code	551
Language	English
Publishing date	2022-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Impact of Intraseasonal Oscillations on the Activity of Tropical Cyclones in Summer Over the South China Sea

Zheng Ling / Yuqing Wang / Guihua Wang / Hailun He

Frontiers in Earth Science, Vol

Nonlocal Tropical Cyclones

2020 Volume 8

Abstract: In addition to tropical cyclones (TCs) locally formed in the South China Sea (SCS), there are also TCs that initially form over the Northwest Pacific (NWP) and move westward to enter the SCS (often called nonlocal TCs). It is unclear how those nonlocal ... ...

Abstract	In addition to tropical cyclones (TCs) locally formed in the South China Sea (SCS), there are also TCs that initially form over the Northwest Pacific (NWP) and move westward to enter the SCS (often called nonlocal TCs). It is unclear how those nonlocal TCs are modulated by the intraseasonal climate variability. In this study, the impacts of two types of intraseasonal oscillations, namely the Madden–Julian Oscillation (MJO) and the quasi-biweekly oscillation (QBWO), on nonlocally formed TCs over the SCS in summer (May–September) are analyzed based on best-track TC data and global reanalysis during 1979–2018. Results show that in the convective phases of both MJO and QBWO, the western Pacific subtropical high shifted more eastward, and more TCs entered the SCS. This is mainly because more TCs formed in the NWP in the convective phases of intraseasonal oscillations and the genesis locations of the NWP TCs shifted westward and closer to the SCS. In addition to TC count, intraseasonal oscillations also affected the intensity of nonlocal TCs entered the SCS, with the influence of QBWO being more significant than MJO. In the convectively active phases of QBWO (phases 2–5), 34 nonlocal TCs reached typhoon intensity, while only two nonlocal TCs reached typhoon intensity in the convectively inactive phases (phases 1, 6, 7, 8). Further analysis indicates that nonlocal TCs often moved with the northwestward propagating convective signals of QBWO, resulting in more and stronger TCs that entered the SCS in the convective phases of QBWO. The mean location that the nonlocal TC entered the SCS also shifted northward with the northward propagation of intraseasonal oscillations.
Keywords	South China Sea ; tropical cyclones ; Madden-Julian oscillation ; quasi-biweekly oscillation ; western pacific subtropical high ; Science ; Q
Subject code	551
Language	English
Publishing date	2020-12-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Recovery of Tropical Cyclone Induced SST Cooling Observed by Satellite in the Northwestern Pacific Ocean

Zheng Ling / Zhifeng Chen / Guihua Wang / Hailun He / Changlin Chen

Remote Sensing, Vol 13, Iss 3781, p

2021 Volume 3781

Abstract: Based on the satellite observed sea surface temperature (SST), the recovery of SST cooling induced by the tropical cyclones (TCs) over the northwestern Pacific Ocean is investigated. The results show that the passage of a TC induces a mean maximum ... ...

Abstract	Based on the satellite observed sea surface temperature (SST), the recovery of SST cooling induced by the tropical cyclones (TCs) over the northwestern Pacific Ocean is investigated. The results show that the passage of a TC induces a mean maximum cooling in the SST of roughly −1.25 °C. It was also found that most of this cooling (~87%) is typically erased within 30 days of TC passage. This recovery time depends upon the degree of cooling, with stronger (weaker) SST cooling corresponding to longer (shorter) recovery time. Further analyses show that the mixed layer depth (MLD) and the upper layer thermocline temperature gradient (UTTG) also play an important role in the SST response to TCs. The maximum cooling increases ~0.1 °C for every 7 m decrease in the MLD or every 0.04 °C/m increase in the UTTG. The combined effects of MLD and TC intensity and translation speed on the SST response are also discussed.
Keywords	sea surface temperature ; tropical cyclones ; mixed layer depth ; thermocline temperature gradient ; Science ; Q
Subject code	551
Language	English
Publishing date	2021-09-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Upper ocean response to tropical cyclones

Han Zhang / Hailun He / Wen-Zhou Zhang / Di Tian

Geoscience Letters, Vol 8, Iss 1, Pp 1-

a review

2021 Volume 12

Abstract: Abstract Tropical cyclones (TCs) are strong natural hazards that are important for local and global air–sea interactions. This manuscript briefly reviews the knowledge about the upper ocean responses to TCs, including the current, surface wave, ... ...

Abstract	Abstract Tropical cyclones (TCs) are strong natural hazards that are important for local and global air–sea interactions. This manuscript briefly reviews the knowledge about the upper ocean responses to TCs, including the current, surface wave, temperature, salinity and biological responses. TCs usually cause upper ocean near-inertial currents, increase strong surface waves, cool the surface ocean, warm subsurface ocean, increase sea surface salinity and decrease subsurface salinity, causing plankton blooms. The upper ocean response to TCs is controlled by TC-induced mixing, advection and surface flux, which usually bias to the right (left) side of the TC track in the Northern (Southern) Hemisphere. The upper ocean response usually recovers in several days to several weeks. The characteristics of the upper ocean response mainly depend on the TC parameters (e.g. TC intensity, translation speed and size) and environmental parameters (e.g. ocean stratification and eddies). In recent decades, our knowledge of the upper ocean response to TCs has improved because of the development of observation methods and numerical models. More processes of the upper ocean response to TCs can be studied by researchers in the future.
Keywords	Tropical cyclone ; Upper ocean ; Dynamic response ; Temperature and salinity variation ; Marine biology ; Science ; Q ; Geology ; QE1-996.5
Subject code	551
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	SpringerOpen
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Streptococcus mutans dexA affects exopolysaccharides production and biofilm homeostasis.

Yan, Yang / Hailun, He / Fenghui, Yang / Pingting, Liu / Lei, Lei / Zhili, Zhao / Tao, Hu

Molecular oral microbiology

2022 Volume 38, Issue 2, Page(s) 134–144

Abstract: Objectives: The study aimed to evaluate the role of Streptococcus mutans (S. mutans) dexA gene on biofilm structure and microecological distribution in multispecies biofilms.: Materials and methods: A multispecies biofilm model consisting of S. ... ...

Abstract	Objectives: The study aimed to evaluate the role of Streptococcus mutans (S. mutans) dexA gene on biofilm structure and microecological distribution in multispecies biofilms. Materials and methods: A multispecies biofilm model consisting of S. mutans and its dexA mutants, Streptococcus gordonii (S. gordonii) and Streptococcus sanguinis (S. sanguinis) was constructed, and bacterial growth, biofilm architecture and microbiota composition were determined to study the effect of the S. mutans dexA on multispecies biofilms. Results: Our results showed that either deletion or overexpression of S. mutans dexA had no effect on the planktonic growth of bacterium, while S. mutans dominated in the multispecies biofilms to form cariogenic biofilms. Furthermore, we revealed that the SmudexA+ group showed structural abnormality in the form of more fractures and blank areas. The morphology of the SmudexA group was sparser and more porous, with reduced and less agglomerated exopolysaccharides scaffold. Interestingly, the microbiota composition analysis provided new insights that the inhibition of S. gordonii and S. sanguinis was alleviated in the SmudexA group compared to the significantly suppressed condition in the other groups. Conclusion: In conclusion, deletion of S. mutans dexA gene re-modules biofilm structure and microbiota composition, thereby leading to decreased cariogenicity. Thus, the S. mutans dexA may be an important target for regulating the cariogenicity of dental plaque biofilms, expecting to be a probiotic for caries control.
MeSH term(s)	Humans ; Streptococcus mutans ; Biofilms ; Streptococcus sanguis ; Streptococcus gordonii/genetics ; Dental Caries/microbiology ; Homeostasis
Language	English
Publishing date	2022-11-07
Publishing country	Denmark
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2537726-7
ISSN	2041-1014 ; 2041-1006
ISSN (online)	2041-1014
ISSN	2041-1006
DOI	10.1111/omi.12395
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Design of effective value calculation model for dynamic dataflow of infrared gas online monitoring

Dong Xiao / Lu Huang / Mohamed Keita / Hailun He / Dayong Chen / Jin Li

PLoS ONE, Vol 16, Iss

2021 Volume 10

Abstract: The development of “CC30A CH4-CO2 combined analyzer” with infrared gas sensor as the core detection device can be widely used in online gas component analysis. In data analysis, the maximum value and arithmetic mean of the sensor data for each test ... ...

Abstract	The development of “CC30A CH4-CO2 combined analyzer” with infrared gas sensor as the core detection device can be widely used in online gas component analysis. In data analysis, the maximum value and arithmetic mean of the sensor data for each test period are not effective value. The characteristics of the dynamic data are: (1) Each DAW completes one test for one parameter, there is a unique effective value; (2) In test state, the fluctuation of the sensor value gradually decreases when approaching to the end of the test. An effective value calculation model was designed using the method of dimensionality reduction of dynamic data. The model was based on the distribution characteristics of the process data, and consists of 4 key steps: (1) Identify the Data Analysis Window (DAW) and build DAW dataset; (2) Calculate the value of optimal DAW dataset segmentation and build DAW subdataset; (3) Calculate the arithmetic mean (Mc) and count the amount of data in each subdataset (Fc), and build the optimal segmentation statistical set; (4) Effective value calculation and error evaluation. Calculation result with 50 sets of monitor data conformed that the EVC model for dynamic data of gas online monitoring meets the requirements of experimental accuracy requirements and test error. This method can be independently calculated without relying on the feedback information of the monitoring device, and it has positive significance for using the algorithm to reduce the hardware design complexity.
Keywords	Medicine ; R ; Science ; Q
Subject code	670
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A Label-Free Fluorometric Glutathione Assay Based on a Conformational Switch of G-quadruplex

Xi Zhou / Doudou Zhang / Ying Yan / Hailun He / Yukui Zhou / Changbei Ma

Molecules, Vol 26, Iss 2743, p

2021 Volume 2743

Abstract: In this paper, a label-free fluorescent method for glutathione (GSH) detection based on a thioflavin T/G-quadruplex conformational switch is developed. The sensing assay is fabricated depending on the virtue of mercury ions to form a thymine–thymine ... ...

Abstract	In this paper, a label-free fluorescent method for glutathione (GSH) detection based on a thioflavin T/G-quadruplex conformational switch is developed. The sensing assay is fabricated depending on the virtue of mercury ions to form a thymine–thymine mismatch, which collapses the distance between two ssDNA and directs the guanine-rich part to form an intra-strand asymmetric split G-quadruplex. The newly formed G-quadruplex efficiently reacts with thioflavin T and enhances the fluorescent intensity. In the presence of GSH, Hg 2+ is absorbed, destroying the G-quadruplex formation with a significant decrease in fluorescence emission. The proposed fluorescent assay exhibits a linear range between 0.03–5 μM of GSH with a detection limit of 9.8 nM. Furthermore, the efficacy of this method is examined using human serum samples to detect GSH. Besides GSH, other amino acids are also investigated in standard samples, which display satisfactory sensitivity and selectivity. Above all, we develop a method with features including potentiality, facility, sensitivity, and selectivity for analyzing GSH for clinical diagnostics.
Keywords	glutathione ; G-quadruplex ; mercury ions ; thioflavin T ; fluorescence assay ; Organic chemistry ; QD241-441
Language	English
Publishing date	2021-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Design of effective value calculation model for dynamic dataflow of infrared gas online monitoring.

Dong Xiao / Lu Huang / Mohamed Keita / Hailun He / Dayong Chen / Jin Li

PLoS ONE, Vol 16, Iss 10, p e

2021 Volume 0259155

Abstract: The development of "CC30A CH4-CO2 combined analyzer" with infrared gas sensor as the core detection device can be widely used in online gas component analysis. In data analysis, the maximum value and arithmetic mean of the sensor data for each test ... ...

Abstract	The development of "CC30A CH4-CO2 combined analyzer" with infrared gas sensor as the core detection device can be widely used in online gas component analysis. In data analysis, the maximum value and arithmetic mean of the sensor data for each test period are not effective value. The characteristics of the dynamic data are: (1) Each DAW completes one test for one parameter, there is a unique effective value; (2) In test state, the fluctuation of the sensor value gradually decreases when approaching to the end of the test. An effective value calculation model was designed using the method of dimensionality reduction of dynamic data. The model was based on the distribution characteristics of the process data, and consists of 4 key steps: (1) Identify the Data Analysis Window (DAW) and build DAW dataset; (2) Calculate the value of optimal DAW dataset segmentation and build DAW subdataset; (3) Calculate the arithmetic mean (Mc) and count the amount of data in each subdataset (Fc), and build the optimal segmentation statistical set; (4) Effective value calculation and error evaluation. Calculation result with 50 sets of monitor data conformed that the EVC model for dynamic data of gas online monitoring meets the requirements of experimental accuracy requirements and test error. This method can be independently calculated without relying on the feedback information of the monitoring device, and it has positive significance for using the algorithm to reduce the hardware design complexity.
Keywords	Medicine ; R ; Science ; Q
Subject code	670
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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