LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 67

Search options

  1. Article: Reconstruction of the spatial distribution of historical farmland in the Taiwan Province of China for 1659–1945

    Yang, Xuhong / Jin, Xiaobin / Xue, Qiaofeng / Zhou, Yinkang

    Land use policy. 2022 Mar., v. 114

    2022  

    Abstract: The reconstruction of historical land use/land cover change (LUCC) in Taiwan Province based on multisource data is of great significance for obtaining an in-depth understanding of the driving mechanisms of LUCC and their effects on the environment and ... ...

    Abstract The reconstruction of historical land use/land cover change (LUCC) in Taiwan Province based on multisource data is of great significance for obtaining an in-depth understanding of the driving mechanisms of LUCC and their effects on the environment and climate. Four rules, spatial restriction, land suitability, directing distribution, and size-control rules, were adopted as indicators to construct a directing probabilistic model for historical land reclamation. After adjusting the model, historical farmland was reassigned in descending order of the land reclamation directing probabilities given by the model. Finally, a high-resolution gridded dataset (100 m × 100 m) on the farmland of Taiwan Province during 1659–1945 was reconstructed. The results showed that (1) a general trend of continued growth of the farmland area in Taiwan Province over the past 300 years was observed; the ratio of reclaimed land was the earliest and highest in Tainan, which agreed with the historical farmland reclamation facts that Tainan was the pioneering area to be reclaimed, followed by Taichung, Taipei, and Taitung. (2) Geographic information elements across different historical periods can serve as important fundamental parameters for the quantitative reconstruction of historical LUCC, and its incorporation into the decision-making process of the model can effectively improve the model accuracy. (3) Correlation analysis between county-level population and farmland area, grid-level modeling result and farmland interpreted from maps have shown well consistent, which demonstrated the rationality of the reconstruction results.
    Keywords agricultural land ; climate ; data collection ; decision making ; land cover ; land policy ; land restoration ; land suitability ; land use ; probabilistic models ; reclaimed land ; spatial data ; China ; Taiwan
    Language English
    Dates of publication 2022-03
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 852476-2
    ISSN 0264-8377
    ISSN 0264-8377
    DOI 10.1016/j.landusepol.2021.105951
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  2. Article: Kearns-Sayre syndrome with rare imaging finding of SLC25A4 Mutation.

    Zhao, Huan / Shi, Min / Yang, Fang / Yang, Xuhong

    Neurosciences (Riyadh, Saudi Arabia)

    2022  Volume 27, Issue 2, Page(s) 111–115

    Abstract: Kearns-Sayre Syndrome (KSS) is a subtype of chronic progressive external ophthalmoplegia (CPEO). In this case, A 21-year-old man diagnosed with KSS, and presented with chronic progressive blepharoptosis (ptosis) and external ophthalmoplegia, diffuse ... ...

    Abstract Kearns-Sayre Syndrome (KSS) is a subtype of chronic progressive external ophthalmoplegia (CPEO). In this case, A 21-year-old man diagnosed with KSS, and presented with chronic progressive blepharoptosis (ptosis) and external ophthalmoplegia, diffuse depigmentation of the retinal pigment epithelium, and cerebellar ataxia, with a cerebrospinal fluid protein of 254 mg/dL, was reported. Genetic screening revealed a novel mutated gene in SLC25A4 in the patient as well as in his mother: NM_001151:c.170G>C in exon 2. Its imaging finding is a characteristic progressive atrophy of the right cerebellar hemisphere. In conclusion, we found a case of KSS with a novel mutated gene in SLC25A4: NM_001151:c.170G>C in exon 2 as the pathogenic mechanism, and found that KSS can be caused only when the proportion of mutations in the SLC25A4 gene reach a certain degree, and the patient with KSS showed a unique cranial imaging feature of unilateral progressive cerebellar atrophy.
    MeSH term(s) Adenine Nucleotide Translocator 1/genetics ; Adult ; Atrophy ; Female ; Humans ; Kearns-Sayre Syndrome/diagnostic imaging ; Kearns-Sayre Syndrome/genetics ; Male ; Mothers ; Mutation/genetics ; Ophthalmoplegia, Chronic Progressive External/diagnosis ; Ophthalmoplegia, Chronic Progressive External/genetics ; Young Adult
    Chemical Substances Adenine Nucleotide Translocator 1 ; SLC25A4 protein, human
    Language English
    Publishing date 2022-04-27
    Publishing country Saudi Arabia
    Document type Case Reports ; Journal Article
    ZDB-ID 2214806-1
    ISSN 1319-6138
    ISSN 1319-6138
    DOI 10.17712/nsj.2022.2.20210123
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: Wildfire Risk Assessment and Zoning by Integrating Maxent and GIS in Hunan Province, China

    Yang, Xuhong / Jin, Xiaobin / Zhou, Yinkang

    Forests. 2021 Sept. 23, v. 12, no. 10

    2021  

    Abstract: Forest wildfire is an important threat and disturbance facing natural forest ecosystems. Conducting wildfire risk assessments and zoning studies are of great practical significance in guiding wildfire prevention, curbing fire occurrence, and mitigating ... ...

    Abstract Forest wildfire is an important threat and disturbance facing natural forest ecosystems. Conducting wildfire risk assessments and zoning studies are of great practical significance in guiding wildfire prevention, curbing fire occurrence, and mitigating the environmental effects of wildfire. Taking Hunan Province, China as the case area, this study used remotely sensed high-temperature fire data as the wildfire sample. Twelve factors related to topography, climatic conditions, vegetation attributes, and human activities were used as environmental variables affecting wildfire occurrence. Then, a Maxent wildfire risk assessment model was constructed with GIS, which analyzed the contribution, importance, and response of environmental variables to wildfire in Hunan Province. The results show that (1) the Maxent model has high applicability and feasibility when applied to wildfire risk assessment after a test of wildfire sample sites; (2) the importance of meteorological conditions and vegetation status variables to wildfire are 54.64% and 25.40%, respectively, and their contribution to wildfire are 43.03% and 34.69%, respectively. The interaction between factors can enhance or weaken the contribution of factors on wildfire. (3) The mechanism for the effects of environmental variables on wildfire is not linear as generally believed; temperature, aridity, land use type, GDP, distance from the road, and population density have a nonlinear positive correlation with the probability of wildfire occurrence. Elevation, slope, precipitation, wind speed, and vegetation cover within the suitable interval positively contribute to the probability of wildfire, while the environmental conditions outside the suitable interval curb the occurrence of wildfire. The response of wildfire probability to forest density is U-shaped, which means either too high or too low will promote the occurrence of wildfire. (4) There is geographical variation of wildfire risk in Hunan Province. The areas at high risk and below account for 74.48% of the total area, while the areas at significantly high risk and above account for a relatively low proportion, 25.52%.
    Keywords dry environmental conditions ; fire prevention ; forests ; geographical variation ; humans ; models ; population density ; risk ; risk assessment ; temperature ; topography ; vegetation cover ; wildfires ; wind speed ; China
    Language English
    Dates of publication 2021-0923
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2527081-3
    ISSN 1999-4907
    ISSN 1999-4907
    DOI 10.3390/f12101299
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  4. Article ; Online: Microstructural white matter changes in chronic migraine patients with liver-yang hyperactivity and qi-blood deficiency syndrome: a diffusion tensor imaging study.

    Shi, Min / Yang, Jie / Yang, Dongdong / Yang, Xuhong / Zhao, Huan

    Neuroreport

    2022  Volume 33, Issue 10, Page(s) 422–428

    Abstract: White matter alterations in patients with chronic migraine (CM) have been reported. Traditional Chinese medicine (TCM) syndromes are clinical syndromes proposed by TCM doctors based on long-term clinical observation and classification of the clinical ... ...

    Abstract White matter alterations in patients with chronic migraine (CM) have been reported. Traditional Chinese medicine (TCM) syndromes are clinical syndromes proposed by TCM doctors based on long-term clinical observation and classification of the clinical symptoms and signs of CM patients. This study aimed to analyze the whole-brain diffusion tensor imaging (DTI) data of CM patients with different types of TCM syndromes. Sixteen CM patients diagnosed with liver-yang hyperactivity (LH) syndrome and 16 CM patients with qi-blood deficiency (QD) syndrome were recruited in this study. Thirty-one healthy controls (HCs) were also enrolled. All subjects underwent DTI and T1-weighted MRI acquisition. Thirty HCs and 30 CM patients (LH group: n = 15; QD group: n = 15) were included in the final analysis. No significant difference was observed in the DTI indexes between CM patients and HCs, including fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD). The mean FAs of the left tapetum and the mean MD values for the right medial lemniscus and the right inferior cerebellar peduncle were significantly different in the LH and HC groups. The mean AD values for the right cingulate gyrus and the left uncinate fasciculus, as well as the mean RD for the right inferior cerebellar peduncle and the left tapetum, were also significantly different between these two groups. CM patients with LH and QD syndrome showed altered FA and diffusivity in comparison to healthy controls, suggesting that there may be significant white matter microstructural alterations in these patients.
    MeSH term(s) Anisotropy ; Brain/diagnostic imaging ; Diffusion Tensor Imaging/methods ; Humans ; Liver ; Migraine Disorders/diagnostic imaging ; Qi ; Syndrome ; White Matter/diagnostic imaging
    Language English
    Publishing date 2022-05-30
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1049746-8
    ISSN 1473-558X ; 0959-4965
    ISSN (online) 1473-558X
    ISSN 0959-4965
    DOI 10.1097/WNR.0000000000001800
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Safety and immunogenicity of inactivated SARS-CoV-2 vaccines in healthy individuals: protocol for a systematic review and meta-analysis.

    Li, Mao / Yang, Xuhong / Jiang, Lianyan / Yang, Dongdong

    BMJ open

    2021  Volume 11, Issue 11, Page(s) e056106

    Abstract: Introduction: COVID-19 has spread with high morbidity and mortality worldwide. Many inactivated SARS-CoV-2 vaccines are being tested at various clinical trial stages for the control and prevention of COVID-19. We aim to comprehensively and objectively ... ...

    Abstract Introduction: COVID-19 has spread with high morbidity and mortality worldwide. Many inactivated SARS-CoV-2 vaccines are being tested at various clinical trial stages for the control and prevention of COVID-19. We aim to comprehensively and objectively evaluate the safety and immunogenicity of inactivated SARS-CoV-2 vaccines in healthy individuals through a systematic review and meta-analysis of randomised controlled trials (RCTs).
    Methods and analysis: We will search electronic databases of PubMed, the Cochrane Library, Web of Science and EMBASE for RCTs from inception to 31 December 2021. We will also search conference abstracts, reference lists, and grey literature of all available records. Two reviewers will independently screen and extract information from the literature. Bias and the quality of included studies will be evaluated with the risk-bias assessment tool provided by the Cochrane Collaboration. Statistical analysis will be performed using Cochrane's Review Manager (RevMan), V.5.3.
    Ethics and dissemination: Ethics approval and patient informed consent are not required because we will be including published literature only. The findings of this research will be disseminated in a peer-reviewed journal and likely through other scientific events such as conferences, seminars and symposia.
    Prospero registration number: CRD42021266285.
    MeSH term(s) COVID-19 ; COVID-19 Vaccines ; Humans ; Meta-Analysis as Topic ; Research Design ; SARS-CoV-2 ; Systematic Reviews as Topic
    Chemical Substances COVID-19 Vaccines
    Language English
    Publishing date 2021-11-05
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2599832-8
    ISSN 2044-6055 ; 2044-6055
    ISSN (online) 2044-6055
    ISSN 2044-6055
    DOI 10.1136/bmjopen-2021-056106
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Acupuncture for rapid eye movement sleep behavior disorder in Parkinson's disease: a case report.

    Li, Mao / Yang, Xuhong / Jiang, Lianyan / Yang, Dongdong

    Acupuncture in medicine : journal of the British Medical Acupuncture Society

    2021  Volume 40, Issue 2, Page(s) 203–204

    MeSH term(s) Acupuncture Therapy/adverse effects ; Humans ; Parkinson Disease/complications ; Parkinson Disease/therapy ; REM Sleep Behavior Disorder/etiology ; REM Sleep Behavior Disorder/therapy
    Language English
    Publishing date 2021-12-09
    Publishing country England
    Document type Case Reports ; Letter
    ZDB-ID 1360533-1
    ISSN 1759-9873 ; 0964-5284
    ISSN (online) 1759-9873
    ISSN 0964-5284
    DOI 10.1177/09645284211041125
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: In Situ Electrospinning of "Dry-Wet" Conversion Nanofiber Dressings for Wound Healing.

    Liu, Shanfei / Wu, Guilin / Wang, Wen / Wang, Heng / Gao, Yingjun / Yang, Xuhong

    Marine drugs

    2023  Volume 21, Issue 4

    Abstract: Rapid wound dressings provide an excellent solution strategy for the treatment of wounds in emergency situations. In this study, aqueous solvent-based PVA/SF/SA/GelMA nanofiber dressings fabricated by a handheld electrospinning device could deposit ... ...

    Abstract Rapid wound dressings provide an excellent solution strategy for the treatment of wounds in emergency situations. In this study, aqueous solvent-based PVA/SF/SA/GelMA nanofiber dressings fabricated by a handheld electrospinning device could deposit quickly and directly on the wound, perfectly fitting wounds with various sizes. Using an aqueous solvent overcame the disadvantage of using the current organic solvents as the medium for rapid wound dressings. The porous dressings had excellent air permeability to ensure smooth gas exchange at the wound site. The distribution range of the tensile strength of the dressings was 9-12 Kpa, and the tensile strain was between 60-80%, providing sufficient mechanical support during wound healing. The dressings could absorb 4-8 times their own weight in solution and could rapidly absorb wound exudates from wet wounds. The nanofibers formed ionic crosslinked hydrogel after absorbing exudates, maintaining the moist condition. It formed a hydrogel-nanofiber composite structure with un-gelled nanofibers and combined the photocrosslinking network to maintain a stable structure at the wound location. The in vitro cell culture assay indicated that the dressings had excellent cell cytocompatibility, and the addition of SF contributed to cell proliferation and wound healing. The in situ deposited nanofiber dressings had excellent potential in the urgent treatment of emergency wounds.
    MeSH term(s) Nanofibers/chemistry ; Wound Healing ; Bandages ; Hydrogels ; Solvents ; Anti-Bacterial Agents/chemistry
    Chemical Substances Hydrogels ; Solvents ; Anti-Bacterial Agents
    Language English
    Publishing date 2023-04-14
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2175190-0
    ISSN 1660-3397 ; 1660-3397
    ISSN (online) 1660-3397
    ISSN 1660-3397
    DOI 10.3390/md21040241
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Rutin-loaded cellulose acetate/poly(ethylene oxide) fiber membrane fabricated by electrospinning: A bioactive material.

    Li, Bingyan / Yang, Xuhong

    Materials science & engineering. C, Materials for biological applications

    2019  Volume 109, Page(s) 110601

    Abstract: Considering its health benefits, rutin provides promising applications in the pharmaceutical and cosmetic industries. However, the low bioavailability and low water solubility limit its application and remain to be resolved. In this study, cellulose ... ...

    Abstract Considering its health benefits, rutin provides promising applications in the pharmaceutical and cosmetic industries. However, the low bioavailability and low water solubility limit its application and remain to be resolved. In this study, cellulose acetate/poly(ethylene oxide) (CA/PEO) fiber was used as carrier for releasing it to relieve these problems. Bioactive fiber membrane was prepared by mixing it with CA/PEO solution. The surface morphology, encapsulation efficiency, antioxidant activity, antibacterial, and drug release of the rutin-loaded fiber membranes were studied. And the characteristics of the membranes were evaluated by the molecular interaction, thermal stability and mechanical properties. The results reveal that the fiber membrane loaded with 1.2 wt% rutin exhibited antioxidant activity of 98.3% and antibacterial properties of 93.5% and 95.0% against E. coli and S. aureus, respectively. Rutin release profiles were best fitted to Korsmeyer-Peppas model, and the fiber membrane released about 90% of rutin after 4 h. This indicates that rutin-loaded CA/PEO fiber membrane is a potential bioactive material.
    MeSH term(s) Anti-Bacterial Agents/chemistry ; Anti-Bacterial Agents/pharmacology ; Cellulose/analogs & derivatives ; Cellulose/chemistry ; Cellulose/pharmacology ; Escherichia coli/growth & development ; Membranes, Artificial ; Polyethylene Glycols/chemistry ; Polyethylene Glycols/pharmacology ; Rutin/chemistry ; Rutin/pharmacology ; Staphylococcus aureus/growth & development
    Chemical Substances Anti-Bacterial Agents ; Membranes, Artificial ; acetylcellulose (3J2P07GVB6) ; Polyethylene Glycols (3WJQ0SDW1A) ; Rutin (5G06TVY3R7) ; Cellulose (9004-34-6)
    Language English
    Publishing date 2019-12-27
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2012160-X
    ISSN 1873-0191 ; 0928-4931
    ISSN (online) 1873-0191
    ISSN 0928-4931
    DOI 10.1016/j.msec.2019.110601
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Analysis of spatio-temporal changes in forest biomass in China

    Xu, Weiyi / Jin, Xiaobin / Liu, Jing / Yang, Xuhong / Ren, Jie / Zhou, Yinkang

    Journal of forestry research. 2022 Feb., v. 33, no. 1

    2022  

    Abstract: Forests play a central role in the global carbon cycle. China's forests have a high carbon sequestration potential owing to their wide distribution, young age and relatively low carbon density. Forest biomass is an essential variable for assessing carbon ...

    Abstract Forests play a central role in the global carbon cycle. China's forests have a high carbon sequestration potential owing to their wide distribution, young age and relatively low carbon density. Forest biomass is an essential variable for assessing carbon sequestration capacity, thus determining the spatio-temporal changes of forest biomass is critical to the national carbon budget and to contribute to sustainable forest management. Based on Chinese forest inventory data (1999–2013), this study explored spatial patterns of forest biomass at a grid resolution of 1 km by applying a downscaling method and further analyzed spatio-temporal changes of biomass at different spatial scales. The main findings are: (1) the regression relationship between forest biomass and the associated influencing factors at a provincial scale can be applied to estimate biomass at a pixel scale by employing a downscaling method; (2) forest biomass had a distinct spatial pattern with the greatest biomass occurring in the major mountain ranges; (3) forest biomass changes had a notable spatial distribution pattern; increase (i.e., carbon sinks) occurred in east and southeast China, decreases (i.e., carbon sources) were observed in the northeast to southwest, with the largest biomass losses in the Hengduan Mountains, Southern Hainan and Northern Da Hinggan Mountains; and, (4) forest vegetation functioned as a carbon sink during 1999–2013 with a net increase in biomass of 3.71 Pg.
    Keywords biomass ; carbon ; carbon sequestration ; carbon sinks ; forest inventory ; forests ; global carbon budget ; research ; sustainable forestry ; China
    Language English
    Dates of publication 2022-02
    Size p. 261-278.
    Publishing place Springer Singapore
    Document type Article
    ZDB-ID 2299615-1
    ISSN 1993-0607 ; 1007-662X
    ISSN (online) 1993-0607
    ISSN 1007-662X
    DOI 10.1007/s11676-021-01299-8
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  10. Article ; Online: A Novel CT-Based Radiomics Features Analysis for Identification and Severity Staging of COPD.

    Li, Zongli / Liu, Ligong / Zhang, Zuoqing / Yang, Xuhong / Li, Xuanyi / Gao, Yanli / Huang, Kewu

    Academic radiology

    2022  Volume 29, Issue 5, Page(s) 663–673

    Abstract: Rationale and objectives: To evaluate the role of radiomics based on Chest Computed Tomography (CT) in the identification and severity staging of chronic obstructive pulmonary disease (COPD).: Materials and methods: This retrospective analysis ... ...

    Abstract Rationale and objectives: To evaluate the role of radiomics based on Chest Computed Tomography (CT) in the identification and severity staging of chronic obstructive pulmonary disease (COPD).
    Materials and methods: This retrospective analysis included 322 participants (249 COPD patients and 73 control subjects). In total, 1395 chest CT-based radiomics features were extracted from each participant's CT images. Three feature selection methods, including variance threshold, Select K Best method, and least absolute shrinkage and selection operator (LASSO), and two classification methods, including support vector machine (SVM) and logistic regression (LR), were used as identification and severity classification of COPD. Performance was compared by AUC, accuracy, sensitivity, specificity, precision, and F1-score.
    Results: 38 and 10 features were selected to construct radiomics models to detect and stage COPD, respectively. For COPD identification, SVM classifier achieved AUCs of 0.992 and 0.970, while LR classifier achieved AUCs of 0.993 and 0.972 in the training set and test set, respectively. For the severity staging of COPD, the mentioned two machine learning classifiers can better differentiate less severity (GOLD1 + GOLD2) group from greater severity (GOLD3 + GOLD4) group. The AUCs of SVM and LR is 0.907 and 0.903 in the training set, and that of 0.799 and 0.797 in the test set.
    Conclusion: The present study showed that the novel radiomics approach based on chest CT images that can be used for COPD identification and severity classification, and the constructed radiomics model demonstrated acceptable performance.
    MeSH term(s) Humans ; Machine Learning ; Pulmonary Disease, Chronic Obstructive/diagnostic imaging ; Retrospective Studies ; Thorax ; Tomography, X-Ray Computed
    Language English
    Publishing date 2022-02-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1355509-1
    ISSN 1878-4046 ; 1076-6332
    ISSN (online) 1878-4046
    ISSN 1076-6332
    DOI 10.1016/j.acra.2022.01.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top