LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 271

Search options

  1. Article ; Online: Recognition of Ellipsoid-like Herbaceous Tibetan Medicinal Materials Using DenseNet with Attention and ILBP-Encoded Gabor Features.

    Zhou, Liyuan / Gao, Hongmei / Gao, Dingguo / Zhao, Qijun

    Entropy (Basel, Switzerland)

    2023  Volume 25, Issue 6

    Abstract: Tibetan medicinal materials play a significant role in Tibetan culture. However, some types of Tibetan medicinal materials share similar shapes and colors, but possess different medicinal properties and functions. The incorrect use of such medicinal ... ...

    Abstract Tibetan medicinal materials play a significant role in Tibetan culture. However, some types of Tibetan medicinal materials share similar shapes and colors, but possess different medicinal properties and functions. The incorrect use of such medicinal materials may lead to poisoning, delayed treatment, and potentially severe consequences for patients. Historically, the identification of ellipsoid-like herbaceous Tibetan medicinal materials has relied on manual identification methods, including observation, touching, tasting, and nasal smell, which heavily rely on the technicians' accumulated experience and are prone to errors. In this paper, we propose an image-recognition method for ellipsoid-like herbaceous Tibetan medicinal materials that combines texture feature extraction and a deep-learning network. We created an image dataset consisting of 3200 images of 18 types of ellipsoid-like Tibetan medicinal materials. Due to the complex background and high similarity in the shape and color of the ellipsoid-like herbaceous Tibetan medicinal materials in the images, we conducted a multi-feature fusion experiment on the shape, color, and texture features of these materials. To leverage the importance of texture features, we utilized an improved LBP (local binary pattern) algorithm to encode the texture features extracted by the Gabor algorithm. We inputted the final features into the DenseNet network to recognize the images of the ellipsoid-like herbaceous Tibetan medicinal materials. Our approach focuses on extracting important texture information while ignoring irrelevant information such as background clutter to eliminate interference and improve recognition performance. The experimental results show that our proposed method achieved a recognition accuracy of 93.67% on the original dataset and 95.11% on the augmented dataset. In conclusion, our proposed method could aid in the identification and authentication of ellipsoid-like herbaceous Tibetan medicinal materials, reducing errors and ensuring the safe use of Tibetan medicinal materials in healthcare.
    Language English
    Publishing date 2023-05-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2014734-X
    ISSN 1099-4300 ; 1099-4300
    ISSN (online) 1099-4300
    ISSN 1099-4300
    DOI 10.3390/e25060847
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Recognition of Ellipsoid-like Herbaceous Tibetan Medicinal Materials Using DenseNet with Attention and ILBP-Encoded Gabor Features

    Liyuan Zhou / Hongmei Gao / Dingguo Gao / Qijun Zhao

    Entropy, Vol 25, Iss 847, p

    2023  Volume 847

    Abstract: Tibetan medicinal materials play a significant role in Tibetan culture. However, some types of Tibetan medicinal materials share similar shapes and colors, but possess different medicinal properties and functions. The incorrect use of such medicinal ... ...

    Abstract Tibetan medicinal materials play a significant role in Tibetan culture. However, some types of Tibetan medicinal materials share similar shapes and colors, but possess different medicinal properties and functions. The incorrect use of such medicinal materials may lead to poisoning, delayed treatment, and potentially severe consequences for patients. Historically, the identification of ellipsoid-like herbaceous Tibetan medicinal materials has relied on manual identification methods, including observation, touching, tasting, and nasal smell, which heavily rely on the technicians’ accumulated experience and are prone to errors. In this paper, we propose an image-recognition method for ellipsoid-like herbaceous Tibetan medicinal materials that combines texture feature extraction and a deep-learning network. We created an image dataset consisting of 3200 images of 18 types of ellipsoid-like Tibetan medicinal materials. Due to the complex background and high similarity in the shape and color of the ellipsoid-like herbaceous Tibetan medicinal materials in the images, we conducted a multi-feature fusion experiment on the shape, color, and texture features of these materials. To leverage the importance of texture features, we utilized an improved LBP (local binary pattern) algorithm to encode the texture features extracted by the Gabor algorithm. We inputted the final features into the DenseNet network to recognize the images of the ellipsoid-like herbaceous Tibetan medicinal materials. Our approach focuses on extracting important texture information while ignoring irrelevant information such as background clutter to eliminate interference and improve recognition performance. The experimental results show that our proposed method achieved a recognition accuracy of 93.67% on the original dataset and 95.11% on the augmented dataset. In conclusion, our proposed method could aid in the identification and authentication of ellipsoid-like herbaceous Tibetan medicinal materials, reducing errors and ensuring the safe use of ...
    Keywords Tibetan medicinal materials ; local binary patterns ; multi-feature fusion ; image recognition ; Science ; Q ; Astrophysics ; QB460-466 ; Physics ; QC1-999
    Subject code 390
    Language English
    Publishing date 2023-05-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  3. Article ; Online: Production of bilirubin via whole-cell transformation utilizing recombinant Corynebacterium glutamicum expressing a β-glucuronidase from Staphylococcus sp. RLH1.

    Zhou, Wei / Cui, Yanan / Chen, Mengyun / Gao, Qijun / Bao, Kai / Wang, Yongzhong / Zhang, Min

    Biotechnology letters

    2024  Volume 46, Issue 2, Page(s) 223–233

    Abstract: Bilirubin, a key active ingredient of bezoars with extensive clinical applications in China, is produced through a chemical process. However, this method suffers from inefficiency and adverse environmental impacts. To address this challenge, we present a ...

    Abstract Bilirubin, a key active ingredient of bezoars with extensive clinical applications in China, is produced through a chemical process. However, this method suffers from inefficiency and adverse environmental impacts. To address this challenge, we present a novel and efficient approach for bilirubin production via whole-cell transformation. In this study, we employed Corynebacterium glutamicum ATCC13032 to express a β-glucuronidase (StGUS), an enzyme from Staphylococcus sp. RLH1 that effectively hydrolyzes conjugated bilirubin to bilirubin. Following the optimization of the biotransformation conditions, a remarkable conversion rate of 79.7% in the generation of bilirubin was obtained at temperate 40 °C, pH 7.0, 1 mM Mg
    MeSH term(s) Bilirubin ; Glucuronidase/genetics ; Glucuronidase/metabolism ; Corynebacterium glutamicum/metabolism ; Staphylococcus ; China
    Chemical Substances Bilirubin (RFM9X3LJ49) ; Glucuronidase (EC 3.2.1.31)
    Language English
    Publishing date 2024-02-04
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 423853-9
    ISSN 1573-6776 ; 0141-5492
    ISSN (online) 1573-6776
    ISSN 0141-5492
    DOI 10.1007/s10529-024-03468-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Identification of TP53 mutation-associated prognostic genes and investigation of the immune cell infiltration in patients with hepatocellular carcinoma.

    Yang, Qijun / Gao, Lianke / Xu, Yuhan / Cao, Gaoquan / He, Yingcheng / Zhang, Wenyige / Zhang, Xue / Wu, Chengfeng / Liao, Kaili / Wang, Xiaozhong

    Genes & diseases

    2023  Volume 11, Issue 2, Page(s) 520–523

    Language English
    Publishing date 2023-04-25
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2821806-1
    ISSN 2352-3042 ; 2352-3042
    ISSN (online) 2352-3042
    ISSN 2352-3042
    DOI 10.1016/j.gendis.2023.03.020
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article: Enhancing legibility in educational settings: Optimizing projection illuminance for varied indoor ambient illuminance.

    Gu, Zhengyin / Bao, Xinle / Zhu, Ying / Song, Saiwei / Gao, Wei / Kang, Chunyan / Wang, Qijun / Wang, Duming / Tian, Yu

    Heliyon

    2024  Volume 10, Issue 6, Page(s) e27485

    Abstract: Projectors are common display devices in the educational setting. However, dim projector lightbulbs or well-lit classrooms may cause blurriness in the projected image. To determine the optimal projection light under different ambient light conditions, ... ...

    Abstract Projectors are common display devices in the educational setting. However, dim projector lightbulbs or well-lit classrooms may cause blurriness in the projected image. To determine the optimal projection light under different ambient light conditions, the conjoint effects of projection illuminance and ambient illuminance on the legibility of projection images indoors were investigated. Participants (N = 96) were randomly assigned to one of six indoor ambient light conditions (0, 40, 80, 120, 160, and 200 lx) and performed a visual search task under several projection illuminance conditions (200, 250, 300, 350, and 400 lx). The accuracy and correct response time on the task were collected to evaluate the participants' visual performance to represent legibility. The optimal projection illuminance (high visual accuracy and fast reaction) was 400 lx (944 ANSI lumen) under all ambient light conditions. To avoid low legibility (accuracy<0.6) and maintain acceptable legibility (accuracy>0.7), the projection illuminance should be increased as the indoor ambient light increases.
    Language English
    Publishing date 2024-03-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2024.e27485
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Clinical characteristics of the delta variant of COVID-19 in Jingmen, China.

    Bie, Fangfang / Yuan, Wensheng / Chen, Yafeng / Gao, Qijun

    Medicine

    2022  Volume 101, Issue 38, Page(s) e30812

    Abstract: There has been an epidemic of the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) delta variant in Jingmen, China, and the clinical and epidemiological characteristics of all patients infected with SARS-CoV-2 delta variant in an epidemic are ...

    Abstract There has been an epidemic of the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) delta variant in Jingmen, China, and the clinical and epidemiological characteristics of all patients infected with SARS-CoV-2 delta variant in an epidemic are rarely reported. All the coronavirus disease 2019 (COVID-19) patients diagnosed in Jingmen in August 2021 were enrolled in this study. Epidemiological data and clinical characteristics were analyzed. Of 58 patients (38 male and 20 female), 11 were children. The mean age was 35 years, and the median age was 39 years (range, 1-60 years; interquartile range, 28-51). The infectivity of the SARS-CoV-2 Delta variant may have increased, but pathogenicity could have decreased significantly. The vast majority of patients had either no symptoms or mild symptoms. Even though the variant virus is highly contagious, control measures have proven effective. Symptoms included fever (53%), cough (48%), headache (6%), runny nose (13%), loss of smell and taste (6%), elevated C-reactive protein (26%), increased neutrophil count (13%), decreased eosinophil count (21%), and elevated mononuclear granulocytes (26%). Thirty-eight of the 47 adults showed lymphocyte decline, but none of the children showed a significant decline, and more than half of them showed an increase. Thirty patients had no pneumonia, 27 patients had mild pneumonia, and only one patient with multiple chronic diseases had severe pneumonia. None of the 11 children had been vaccinated, 10 did not have pneumonia, and 1 had a small lung lesion. The number of new patients disappeared in 15 days after the lockdown of the city.
    MeSH term(s) Adolescent ; Adult ; C-Reactive Protein/metabolism ; COVID-19/epidemiology ; Child ; Child, Preschool ; China/epidemiology ; Communicable Disease Control ; Female ; Humans ; Infant ; Male ; Middle Aged ; Retrospective Studies ; SARS-CoV-2 ; Young Adult
    Chemical Substances C-Reactive Protein (9007-41-4)
    Language English
    Publishing date 2022-10-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80184-7
    ISSN 1536-5964 ; 0025-7974
    ISSN (online) 1536-5964
    ISSN 0025-7974
    DOI 10.1097/MD.0000000000030812
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Hypergravity stimulates mechanical behavior and micro-architecture of tibia in rats.

    Gao, Lilan / Chen, Ruiqi / Liu, Jin / Tan, Yansong / Gao, Qijun / Zhang, Chunqiu / Lv, Linwei

    Journal of bone and mineral metabolism

    2023  Volume 42, Issue 1, Page(s) 17–26

    Abstract: Introduction: The bone tissue is susceptible to hypergravity (+ G) environment. It is necessary to discuss the extent to which specific + G values are beneficial or detrimental to bone tissue. The objective of this study was to characterize the effects ... ...

    Abstract Introduction: The bone tissue is susceptible to hypergravity (+ G) environment. It is necessary to discuss the extent to which specific + G values are beneficial or detrimental to bone tissue. The objective of this study was to characterize the effects of high + G values on mechanical properties, microstructures, and cellular metabolism of bone.
    Materials and methods: 30 male Wistar rats aged 12 weeks were randomly divided into 5 groups, and bore different + G (namely + 1G, + 4G, + 8G, + 10G and + 12G) environments respectively for 4 weeks, 5 days each week, and 3 minutes each day. The macro-mechanical parameters, microstructure parameters, and mRNA transcription levels of the tibia were determined through the three-point bending method, micro-CT detection, and q-PCR analysis, respectively.
    Results: As the + G value increases, hypergravity becomes increasingly detrimental to the macro-mechanical performance of rat tibia. Concerning the microstructure of cancellous bone, there appears to be a favorable trend at + 4G, followed by a progressively detrimental trend at higher G values. In addition, the mRNA transcription levels of OPG and RANKL show an initial tendency of enhanced bone absorption at +4G, followed by an increase in bone remodeling capacity as G value increases.
    Conclusion: The higher G values correspond to poorer macro-mechanical properties of the tibia, and a + 4G environment benefits the microstructure of the tibia. At the cellular level, bone resorption is enhanced in the + 4G group, but the bone remodeling capability gradually increases with further increments in G values.
    MeSH term(s) Rats ; Male ; Animals ; Tibia ; Rats, Wistar ; Hypergravity ; Bone Remodeling ; RNA, Messenger/genetics ; RNA, Messenger/metabolism ; Bone Density
    Chemical Substances RNA, Messenger
    Language English
    Publishing date 2023-12-07
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 1295123-7
    ISSN 1435-5604 ; 0914-8779
    ISSN (online) 1435-5604
    ISSN 0914-8779
    DOI 10.1007/s00774-023-01481-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: An upconversion nanosensor with phenolic-like functionality for accurate identification of chlorpyrifos in grapes.

    Wu, Meng / Yi, Jiaqi / Yin, Chenhui / Sun, Qijun / Gao, Lei / Niu, Na / Chen, Ligang

    Food chemistry

    2023  Volume 416, Page(s) 135859

    Abstract: The inappropriate use of the organophosphorus pesticide chlorpyrifos (CPF) in agricultural production could be harmful to the environment and non-target organisms. Here, we prepared a nano-fluorescent probe with phenolic function based on covalently ... ...

    Abstract The inappropriate use of the organophosphorus pesticide chlorpyrifos (CPF) in agricultural production could be harmful to the environment and non-target organisms. Here, we prepared a nano-fluorescent probe with phenolic function based on covalently coupled rhodamine derivatives (RDP) of upconverted nano-particles (UCNPs) for trace detection of chlorpyrifos. Due to the fluorescence resonance energy transfer (FRET) effect in the system, the fluorescence of UCNPs is quenched by RDP. The phenolic-functional RDP is converted to the spironolactone form when it captures chlorpyrifos. This structural shift prevents the FRET effect in the system and allows the fluorescence of UCNPs to be restored. In addition, the 980 nm excitement conditions of UCNPs will also avoid interference from non-target fluorescent backgrounds. This work has obvious advantages in terms of selectivity and sensitivity, which can be widely applied to the rapid analysis of chlorpyrifos residues in food samples.
    MeSH term(s) Chlorpyrifos ; Vitis ; Pesticides ; Organophosphorus Compounds ; Gold/chemistry ; Fluorescence Resonance Energy Transfer ; Nanoparticles/chemistry
    Chemical Substances Chlorpyrifos (JCS58I644W) ; Pesticides ; Organophosphorus Compounds ; Gold (7440-57-5)
    Language English
    Publishing date 2023-03-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2023.135859
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Dual-mode fluorimetric and colorimetric sensors based on iron and nitrogen co-doped carbon dots for the detection of dopamine.

    Sun, Peng / Shang, Mingzhao / Xie, Ruyan / Gao, Yu / Tian, Miaomiao / Dai, Qijun / Zhang, Fang / Chai, Fang

    Food chemistry

    2024  Volume 445, Page(s) 138794

    Abstract: Determination of dopamine (DA) is crucial for its intimate relationship with clinical trials and biological environment. Herein, Fe, N co-doped carbon dots (AFC-CDs) were fabricated by optimizing precursors and reaction conditions for fluorimetric/ ... ...

    Abstract Determination of dopamine (DA) is crucial for its intimate relationship with clinical trials and biological environment. Herein, Fe, N co-doped carbon dots (AFC-CDs) were fabricated by optimizing precursors and reaction conditions for fluorimetric/colorimetric dual-mode sensing of DA. With synergistic influence of Förster resonance energy transfer and static quenching effect, DA significantly quenched the blue luminescence of AFC-CDs at 442 nm, the production of recognizable tan-brown complex caused evident colorimetric response, achieved the dual-mode fluorimetric/colorimetric sensing for DA. The excellent selectivity and satisfied sensitivity can be confirmed with the limit of detection at 0.29 μM and 2.31 μM via fluorimetric/colorimetric mode respectively. The reliability and practicability were proved by recovery of 94.81-101.61% in real samples. Notably, the proposed electron transfer way between AFC-CDs and DA was hypothesized logically, indicated dual-mode probe provided a promising platform for the sensing of trace DA, and could be expanded in environment and food safety.
    MeSH term(s) Iron ; Colorimetry ; Dopamine ; Reproducibility of Results ; Carbon ; Nitrogen ; Quantum Dots
    Chemical Substances Iron (E1UOL152H7) ; Dopamine (VTD58H1Z2X) ; Carbon (7440-44-0) ; Nitrogen (N762921K75)
    Language English
    Publishing date 2024-02-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2024.138794
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Application progress of two-dimensional correlation spectroscopy in biomass

    Gao Tianliang / Zhao Chuanshan / Ding Qijun

    E3S Web of Conferences, Vol 233, p

    2021  Volume 01058

    Abstract: As a renewable resource, biomass resources have been widely concerned. The internal structure and changes of the graduate students play an important role in the utilization of biomass. Compared with conventional spectroscopy technology, two-dimensional ... ...

    Abstract As a renewable resource, biomass resources have been widely concerned. The internal structure and changes of the graduate students play an important role in the utilization of biomass. Compared with conventional spectroscopy technology, two-dimensional correlation spectroscopy (2D-COS) can provide not only the characteristic information of each functional group, but also the interaction information between each functional group. Therefore, the application of two-dimensional correlation spectroscopy in biomass has attracted increasing attention. First introduced the 2D-COS technology, focusing on the application progress of 2D-COS in the internal structure of graduate student molecules and molecules, biomass energy utilization technology and other aspects. Finally, the existing problems and future prospects are analyzed.
    Keywords Environmental sciences ; GE1-350
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

To top