LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 22

Search options

  1. Article: Review-Hysteresis in Carbon Nano-Structure Field Effect Transistor.

    Lu, Yu-Xuan / Lin, Chih-Ting / Tsai, Ming-Hsui / Lin, Kuan-Chou

    Micromachines

    2022  Volume 13, Issue 4

    Abstract: In recent decades, the research of nano-structure devices (e.g., carbon nanotube and graphene) has experienced rapid growth. These materials have supreme electronic, thermal, optical and mechanical properties and have received widespread concern in ... ...

    Abstract In recent decades, the research of nano-structure devices (e.g., carbon nanotube and graphene) has experienced rapid growth. These materials have supreme electronic, thermal, optical and mechanical properties and have received widespread concern in different fields. It is worth noting that gate hysteresis behavior of field effect transistors can always be found in ambient conditions, which may influence the transmission appearance. Many researchers have put forward various views on this question. Here, we summarize and discuss the mechanisms behind hysteresis, different influencing factors and improvement methods which help decrease or eliminate unevenness and asymmetry.
    Language English
    Publishing date 2022-03-25
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2620864-7
    ISSN 2072-666X
    ISSN 2072-666X
    DOI 10.3390/mi13040509
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: The First-Water-Layer Evolution at the Graphene/Water Interface under Different Electro-Modulated Hydrophilic Conditions Observed by Suspended/Supported Field-Effect-Device Architectures.

    Tsai, Ming-Hsiu / Lu, Yu-Xuan / Lin, Cheng-Yu / Lin, Chun-Hsuan / Wang, Chien-Chun / Chu, Che-Men / Woon, Wei-Yen / Lin, Chih-Ting

    ACS applied materials & interfaces

    2023  Volume 15, Issue 13, Page(s) 17019–17028

    Abstract: Interfacial water molecules affect carrier transportation within graphene and related applications. Without proper tools, however, most of the previous works focus on simulation modeling rather than experimental validation. To overcome this obstacle, a ... ...

    Abstract Interfacial water molecules affect carrier transportation within graphene and related applications. Without proper tools, however, most of the previous works focus on simulation modeling rather than experimental validation. To overcome this obstacle, a series of graphene field-effect transistors (GFETs) with suspended (substrate-free, SF) and supported (oxide-supported, OS) configurations are developed to investigate the graphene-water interface under different hydrophilic conditions. With deionized water environments, in our experiments, the electrical transportation behaviors of the graphene mainly originate from the evolution of the interfacial water-molecule arrangement. Also, these current-voltage behaviors can be used to elucidate the first-water layer at the graphene-water interface. For SF-GFET, our experimental results show positive hysteresis in electrical transportation. These imply highly ordered interfacial water molecules with a separated-ionic distributed structure. For OS-GFET, on the contrary, the negative hysteresis shows the formation of the hydrogen-bond interaction between the interfacial water layer and the SiO
    Language English
    Publishing date 2023-03-22
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.3c00037
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Trametinib ameliorates aging-associated gut pathology in

    Ureña, Enric / Xu, Bowen / Regan, Jennifer C / Atilano, Magda L / Minkley, Lucy J / Filer, Danny / Lu, Yu-Xuan / Bolukbasi, Ekin / Khericha, Mobina / Alic, Nazif / Partridge, Linda

    Proceedings of the National Academy of Sciences of the United States of America

    2024  Volume 121, Issue 4, Page(s) e2311313121

    Abstract: Pharmacological therapies are promising interventions to slow down aging and reduce multimorbidity in the elderly. Studies in animal models are the first step toward translation of candidate molecules into human therapies, as they aim to elucidate the ... ...

    Abstract Pharmacological therapies are promising interventions to slow down aging and reduce multimorbidity in the elderly. Studies in animal models are the first step toward translation of candidate molecules into human therapies, as they aim to elucidate the molecular pathways, cellular mechanisms, and tissue pathologies involved in the anti-aging effects. Trametinib, an allosteric inhibitor of MEK within the Ras/MAPK (Ras/Mitogen-Activated Protein Kinase) pathway and currently used as an anti-cancer treatment, emerged as a geroprotector candidate because it extended lifespan in the fruit fly
    MeSH term(s) Animals ; Male ; Humans ; Female ; Aged ; Drosophila ; Drosophila melanogaster/genetics ; Aging/physiology ; Stem Cells/metabolism ; Mammals ; Pyridones ; Pyrimidinones
    Chemical Substances trametinib (33E86K87QN) ; Pyridones ; Pyrimidinones
    Language English
    Publishing date 2024-01-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.2311313121
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Sexual identity of enterocytes regulates autophagy to determine intestinal health, lifespan and responses to rapamycin.

    Regan, Jennifer C / Lu, Yu-Xuan / Ureña, Enric / Meilenbrock, Ralf L / Catterson, James H / Kißler, Disna / Fröhlich, Jenny / Funk, Emilie / Partridge, Linda

    Nature aging

    2022  Volume 2, Issue 12, Page(s) 1145–1158

    Abstract: Pharmacological attenuation of mTOR presents a promising route for delay of age-related disease. Here we show that treatment of Drosophila with the mTOR inhibitor rapamycin extends lifespan in females, but not in males. Female-specific, age-related gut ... ...

    Abstract Pharmacological attenuation of mTOR presents a promising route for delay of age-related disease. Here we show that treatment of Drosophila with the mTOR inhibitor rapamycin extends lifespan in females, but not in males. Female-specific, age-related gut pathology is markedly slowed by rapamycin treatment, mediated by increased autophagy. Treatment increases enterocyte autophagy in females, via the H3/H4 histone-Bchs axis, whereas males show high basal levels of enterocyte autophagy that are not increased by rapamycin feeding. Enterocyte sexual identity, determined by transformer
    MeSH term(s) Female ; Animals ; Male ; Mice ; Longevity ; Sirolimus/pharmacology ; Enterocytes/metabolism ; TOR Serine-Threonine Kinases/metabolism ; Drosophila/metabolism ; Autophagy
    Chemical Substances Sirolimus (W36ZG6FT64) ; bis(cyclohexylammonium)sulfate (17911-61-4) ; TOR Serine-Threonine Kinases (EC 2.7.11.1)
    Language English
    Publishing date 2022-12-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2662-8465
    ISSN (online) 2662-8465
    DOI 10.1038/s43587-022-00308-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Effects of Physical Activity and Counselling Interventions on Health Outcomes among Working Women in Shanghai

    Hongying Wang, Tao Zhang, Miaomiao Lu, YuXuan Zeng, Yi Xiao, Xiaoling Ren, Pei Zhang

    Journal of Sports Science and Medicine, Vol 20, Iss 1, Pp 77-

    2021  Volume 85

    Abstract: Working women in Shanghai are a high-risk group of suffering work stress and burnout. Women have been found to be affected by work-family conflicts, which results in lower health-related quality of life (HRQoL), higher job stress, and burnout. This study ...

    Abstract Working women in Shanghai are a high-risk group of suffering work stress and burnout. Women have been found to be affected by work-family conflicts, which results in lower health-related quality of life (HRQoL), higher job stress, and burnout. This study evaluated the potential physical activity and counselling intervention effects on health outcomes of working women in Shanghai. Participants were randomly recruited from eight communities of Shanghai using the stratified cluster sampling method. A total of 121 female workers took part in this study, who were randomly divided into three groups: a control group and two intervention groups (individual-based and group-based intervention). The first intervention involved a moderate physical activity program and an individual based counselling intervention, while the second included the same physical activity program, but with a group counselling approach. Both interventions lasted 12 weeks. Subjective perceptions of work stress, burnout, and HRQoL were measured before and after the intervention. In the control group, the HRQoL value decreased after the intervention, with the mean value falling from 91.59 to 87.10, while there was no significant difference found between participants for stress (p = 0.752) and burnout (p = 0.622) before and after the intervention. After the intervention, the value of stress and burnout decreased, and the value of HRQoL increased in the two intervention groups. At the intervention’s completion, there were significant differences compared between the two intervention groups and the control group separately regarding changes in burnout and HRQoL (all p = 0.000). For stress, the group-based intervention group exhibited a significant difference compared to the control group (p = 0.000), while the individual-based intervention group did not (p = 0.128). A Physical activity and counselling intervention delivered either in a group or individual format could reduce stress, burnout, and improve HRQoL of working women in Shanghai, and the group ...
    Keywords stress ; burnout ; quality of life ; working women ; shanghai ; Sports ; GV557-1198.995 ; Sports medicine ; RC1200-1245
    Subject code 796
    Language English
    Publishing date 2021-03-01T00:00:00Z
    Publisher University of Uludag
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  6. Article ; Online: Correction for: Jian-Pi-Yi-Shen decoction inhibits mitochondria-dependent granulosa cell apoptosis in a rat model of POF.

    Jiang, Xiao-Lin / Tai, He / Kuang, Jin-Song / Zhang, Jing-Yi / Cui, Shi-Chao / Lu, Yu-Xuan / Qi, Shu-Bo / Zhang, Shi-Yu / Li, Shun-Min / Chen, Jian-Ping / Meng, Xian-Sheng

    Aging

    2023  Volume 15, Issue 6, Page(s) 2358–2360

    Language English
    Publishing date 2023-03-30
    Publishing country United States
    Document type Journal Article ; Published Erratum
    ISSN 1945-4589
    ISSN (online) 1945-4589
    DOI 10.18632/aging.204637
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article: Transcranial Doppler Ultrasonography detection on cerebrovascular flow for evaluating neonatal hypoxic-ischemic encephalopathy modeling.

    Liu, Jin-Xiang / Fang, Chang-Le / Zhang, Kun / Ma, Rui-Fang / Zhou, Hong-Su / Chen, Li / Wang, Qiu-Lin / Lu, Yu-Xuan / Wang, Ting-Hua / Xiong, Liu-Lin

    Frontiers in neuroscience

    2023  Volume 17, Page(s) 962001

    Abstract: Objective: This study aimed to investigate the feasibility of Transcranial Doppler Ultrasonography (TCD) in evaluating neonatal hypoxic-ischemic encephalopathy (NHIE) modeling through monitoring the alteration of cerebrovascular flow in neonatal hypoxic- ...

    Abstract Objective: This study aimed to investigate the feasibility of Transcranial Doppler Ultrasonography (TCD) in evaluating neonatal hypoxic-ischemic encephalopathy (NHIE) modeling through monitoring the alteration of cerebrovascular flow in neonatal hypoxic-ischemic (HI) rats.
    Methods: Postnatal 7-day-old Sprague Dawley (SD) rats were divided into the control group, HI group, and hypoxia (H) group. TCD was applied to assess the changes of cerebral blood vessels, cerebrovascular flow velocity, and heart rate (HR) in sagittal and coronal sections at 1, 2, 3, and 7 days after the operation. For accuracy, cerebral infarct of rats was examined by 2,3,5-Triphenyl tetrazolium chloride (TTC) staining and Nissl staining to simultaneously verify the establishment of NHIE modeling.
    Results: Coronal and sagittal TCD scans revealed obvious alteration of cerebrovascular flow in main cerebral vessels. Obvious cerebrovascular back-flow was observed in anterior cerebral artery (ACA), basilar artery (BA), middle cerebral artery (MCA) of HI rats, along with accelerated cerebrovascular flows in the left internal carotid artery (ICA-L) and BA, decreased flows in right internal carotid artery (ICA-R) relative to those in the H and control groups. The alterations of cerebral blood flows in neonatal HI rats indicated successful ligation of right common carotid artery. Besides, TTC staining further validated the cerebral infarct was indeed caused due to ligation-induced insufficient blood supply. Damage to nervous tissues was also revealed by Nissl staining.
    Conclusion: Cerebral blood flow assessment by TCD in neonatal HI rats contributed to cerebrovascular abnormalities observed in a real-time and non-invasive way. The present study elicits the potentials to utilize TCD as an effective means for monitoring the progression of injury as well as NHIE modeling. The abnormal appearance of cerebral blood flow is also beneficial to the early warning and effective detection in clinical practice.
    Language English
    Publishing date 2023-05-12
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2411902-7
    ISSN 1662-453X ; 1662-4548
    ISSN (online) 1662-453X
    ISSN 1662-4548
    DOI 10.3389/fnins.2023.962001
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Jian-Pi-Yi-Shen decoction inhibits mitochondria-dependent granulosa cell apoptosis in a rat model of POF.

    Jiang, Xiao-Lin / Tai, He / Kuang, Jin-Song / Zhang, Jing-Yi / Cui, Shi-Chao / Lu, Yu-Xuan / Qi, Shu-Bo / Zhang, Shi-Yu / Li, Shun-Min / Chen, Jian-Ping / Meng, Xian-Sheng

    Aging

    2022  Volume 14, Issue 20, Page(s) 8321–8345

    Abstract: As a widely applied traditional Chinese medicine (TCM), Jian-Pi-Yi-Shen (JPYS) decoction maybe applied in curing premature ovarian failure (POF) besides chronic kidney disease (CKD). ...

    Abstract As a widely applied traditional Chinese medicine (TCM), Jian-Pi-Yi-Shen (JPYS) decoction maybe applied in curing premature ovarian failure (POF) besides chronic kidney disease (CKD).
    MeSH term(s) Rats ; Female ; Humans ; Animals ; Primary Ovarian Insufficiency/metabolism ; Triptorelin Pamoate/metabolism ; Triptorelin Pamoate/pharmacology ; Drugs, Chinese Herbal/pharmacology ; Drugs, Chinese Herbal/therapeutic use ; Apoptosis ; Granulosa Cells/metabolism ; Mitochondria/metabolism
    Chemical Substances Triptorelin Pamoate (08AN7WA2G0) ; Drugs, Chinese Herbal
    Language English
    Publishing date 2022-10-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1945-4589
    ISSN (online) 1945-4589
    DOI 10.18632/aging.204320
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Long-lasting geroprotection from brief rapamycin treatment in early adulthood by persistently increased intestinal autophagy.

    Juricic, Paula / Lu, Yu-Xuan / Leech, Thomas / Drews, Lisa F / Paulitz, Jonathan / Lu, Jiongming / Nespital, Tobias / Azami, Sina / Regan, Jennifer C / Funk, Emilie / Fröhlich, Jenny / Grönke, Sebastian / Partridge, Linda

    Nature aging

    2022  Volume 2, Issue 9, Page(s) 824–836

    Abstract: The licensed drug rapamycin has potential to be repurposed for geroprotection. A key challenge is to avoid adverse side effects from continuous dosing. Here we show that geroprotective effects of chronic rapamycin treatment can be obtained with a brief ... ...

    Abstract The licensed drug rapamycin has potential to be repurposed for geroprotection. A key challenge is to avoid adverse side effects from continuous dosing. Here we show that geroprotective effects of chronic rapamycin treatment can be obtained with a brief pulse of the drug in early adulthood in female Drosophila and mice. In Drosophila, a brief, early rapamycin treatment of adults extended lifespan and attenuated age-related decline in the intestine to the same degree as lifelong dosing. Lasting memory of earlier treatment was mediated by elevated autophagy in intestinal enterocytes, accompanied by increased levels of intestinal LManV and lysozyme. Brief elevation of autophagy in early adulthood itself induced a long-term increase in autophagy. In mice, a 3-month, early treatment also induced a memory effect, with maintenance similar to chronic treatment, of lysozyme distribution, Man2B1 level in intestinal crypts, Paneth cell architecture and gut barrier function, even 6 months after rapamycin was withdrawn.
    MeSH term(s) Animals ; Female ; Mice ; Sirolimus/pharmacology ; Muramidase/pharmacology ; Paneth Cells ; Drosophila ; Autophagy
    Chemical Substances Sirolimus (W36ZG6FT64) ; Muramidase (EC 3.2.1.17)
    Language English
    Publishing date 2022-08-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2662-8465
    ISSN (online) 2662-8465
    DOI 10.1038/s43587-022-00278-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Global metabolomic analyses of the hemolymph and brain during the initiation, maintenance, and termination of pupal diapause in the cotton bollworm, Helicoverpa armigera.

    Lu, Yu-Xuan / Zhang, Qi / Xu, Wei-Hua

    PloS one

    2014  Volume 9, Issue 6, Page(s) e99948

    Abstract: A strategy known as diapause (developmental arrest) has evolved in insects to increase their survival rate under harsh environmental conditions. Diapause causes a dramatic reduction in the metabolic rate and drastically extends lifespan. However, little ... ...

    Abstract A strategy known as diapause (developmental arrest) has evolved in insects to increase their survival rate under harsh environmental conditions. Diapause causes a dramatic reduction in the metabolic rate and drastically extends lifespan. However, little is known about the mechanisms underlying the metabolic changes involved. Using gas chromatography-mass spectrometry, we compared the changes in the metabolite levels in the brain and hemolymph of nondiapause- and diapause-destined cotton bollworm, Helicoverpa armigera, during the initiation, maintenance, and termination of pupal diapause. A total of 55 metabolites in the hemolymph and 52 metabolites in the brain were detected. Of these metabolites, 21 and 12 metabolite levels were altered in the diapause pupal hemolymph and brain, respectively. During diapause initiation and maintenance, the number of metabolites with increased levels in the hemolymph of the diapausing pupae is far greater than the number in the nondiapause pupae. These increased metabolites function as an energy source, metabolic intermediates, and cryoprotectants. The number of metabolites with decreased levels in the brain of diapausing pupae is far greater than the number in the nondiapause pupae. Low metabolite levels are likely to directly or indirectly repress the brain metabolic activity. During diapause termination, most of the metabolite levels in the hemolymph of the diapausing pupae rapidly decrease because they function as energy and metabolic sources that promote pupa-adult development. In conclusion, the metabolites with altered levels in the hemolymph and brain serve as energy and metabolic resources and help to maintain a low brain metabolic activity during diapause.
    MeSH term(s) Animals ; Brain/metabolism ; Brain/physiology ; Gene Expression Regulation, Developmental/physiology ; Hemolymph/metabolism ; Hemolymph/physiology ; Metabolomics/methods ; Metamorphosis, Biological/physiology ; Pupa/metabolism ; Pupa/physiology
    Language English
    Publishing date 2014-06-13
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0099948
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top