LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 1279

Search options

  1. Book ; Online: High Entropy Materials: Challenges and Prospects

    Li, Weidong / Liaw, Peter K.

    2021  

    Keywords Technology: general issues ; high-entropy alloys ; intermetallic ; alloy design ; phase stability ; high-entropy alloy ; soft magnetic properties ; mechanical properties ; saturation magnetostriction coefficient ; face-centered cubic (FCC) structure ; high entropy alloys ; laser beam welding ; microstructure ; TiC ; tribological properties ; wear mechanism ; refractory metals ; bulk metallic glass (BMG) ; fatigue behavior ; industrial-grade zirconium raw material ; carbide ; high-entropy carbides ; binders ; high-entropy hardmetals ; biomedical materials ; n/a
    Size 1 electronic resource (126 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Publishing place Basel, Switzerland
    Document type Book ; Online
    Note English ; Open Access
    HBZ-ID HT021289883
    ISBN 9783036524078 ; 303652407X
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  2. Article ; Online: Experimental and simulation study of inert gas mixture inhibiting coal spontaneous combustion.

    Wang, Xinning / Wang, Lei / Li, Weidong / Liu, Dongyang

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 4305

    Abstract: To explore the mechanism of inhibiting spontaneous combustion of coal by mixed gases, the low-temperature oxidation characteristics of coal under different components of mixed gases were analyzed. ESR and FTIR experiments were used to investigate the ... ...

    Abstract To explore the mechanism of inhibiting spontaneous combustion of coal by mixed gases, the low-temperature oxidation characteristics of coal under different components of mixed gases were analyzed. ESR and FTIR experiments were used to investigate the effects of different gas mixtures on the activity of coal during low-temperature oxidation and the oxidation reaction of coal surface functional groups. The mechanism of chemical oxygen inhibition of mixed gas was studied by density functional theory. The results show that the larger the CO
    Language English
    Publishing date 2024-02-21
    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/s41598-024-53979-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  3. Article ; Online: Life cycle assessment of carbon footprint in dual-phase automotive strip steel production.

    Fang, Xiaoqing / Sun, Wenqiang / Li, Weidong / Ma, Guangyu

    Environmental science and pollution research international

    2024  Volume 31, Issue 17, Page(s) 26300–26314

    Abstract: As the demand for automotive materials grows more stringent in environmental considerations, it becomes imperative to conduct thorough environmental impact assessments of dual-phase automotive strip steel (DP steel). However, the absence of detailed and ... ...

    Abstract As the demand for automotive materials grows more stringent in environmental considerations, it becomes imperative to conduct thorough environmental impact assessments of dual-phase automotive strip steel (DP steel). However, the absence of detailed and comparable studies has left the carbon footprint of DP steel and its sources largely unknown. This study addresses this gap by establishing a cradle-to-gate life cycle model for DP steel, encompassing on-site production, energy systems, and upstream processes. The analysis identifies and scrutinizes key factors influencing the carbon footprint, with a focus on upstream mining, transportation, and on-site production processes. The results indicate that the carbon footprint of DP steel is 2.721 kgCO
    MeSH term(s) Animals ; Carbon Footprint ; Steel ; Metals ; Carbon ; Life Cycle Stages ; Carbon Dioxide
    Chemical Substances Steel (12597-69-2) ; Metals ; Carbon (7440-44-0) ; Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2024-03-19
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-024-32940-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 5915: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  4. Article ; Online: Reductive Oxy-Nazarov Cyclization toward Expedient Construction of a Cyclopenta[1,2-

    Yan, Xifei / Zhang, Qin / Zheng, Jianfeng / Li, Wei-Dong Z

    The Journal of organic chemistry

    2024  Volume 89, Issue 7, Page(s) 5164–5169

    Abstract: Formal total syntheses of stemonamine and cephalotaxine bearing the core cyclopenta[1,2- ...

    Abstract Formal total syntheses of stemonamine and cephalotaxine bearing the core cyclopenta[1,2-
    Language English
    Publishing date 2024-03-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.4c00035
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 4473: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  5. Article ; Online: Distinguishing features of Prunus humilis, P. japonica, P. pedunculata seeds and their adulterant based on DNA barcoding, morphological characterization, and chemical profiles.

    Li, Ping / Zhao, Zihan / Li, Zongshuo / Zeng, Rong / Li, Weidong

    Fitoterapia

    2024  Volume 175, Page(s) 105942

    Abstract: Pruni Semen, the dried ripe seed of Prunus humilis, P. japonica, or P. pedunculata as recorded in the Chinese Pharmacopoeia, has been widely used in pharmaceutical and food industries. The adulteration of the marketed product with morphologically similar ...

    Abstract Pruni Semen, the dried ripe seed of Prunus humilis, P. japonica, or P. pedunculata as recorded in the Chinese Pharmacopoeia, has been widely used in pharmaceutical and food industries. The adulteration of the marketed product with morphologically similar plants of the same genus has led to variable product quality and clinical effectiveness. This study systematically investigated the phylogenetic relationships, morphological traits, and chemical profiles of 37 Pruni Semen samples from planting bases, markets, and fields. DNA barcoding could successfully distinguish the genuine and counterfeit Pruni Semen, and the results indicated that there was almost no authentic Pruni Semen available in the market. The samples were divided into "big seed" (P. pedunculata and P. salicina seeds) and "small seed" (P. humilis, P. japonica, P. tomentosa, and P. avium seeds) categories based on morphology results. The notable discrepancy in the chemical characteristics of "big seed" and "small seed" was that "small seeds" were rich in flavonoids and low in amygdalin, whereas "big seeds" were the opposite. Furthermore, principal component analysis and clustered heatmap analysis verified the distinguishing features of "big seed" and "small seed" based on morphological and chemical characteristics. This study suggested that a combination of DNA barcoding and morphological and chemical characteristics can aid in the identification and quality evaluation of authentic and adulterated Pruni Semen. These findings may help standardize Pruni Semen available in the market and protect the rights and interests of customers.
    Language English
    Publishing date 2024-04-02
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 412385-2
    ISSN 1873-6971 ; 0367-326X
    ISSN (online) 1873-6971
    ISSN 0367-326X
    DOI 10.1016/j.fitote.2024.105942
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.B 1873: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  6. Book ; Online: Improved approximation schemes for early work scheduling on identical parallel machines with common due date

    Li, Weidong

    2020  

    Abstract: We study the early work scheduling problem on identical parallel machines in order to maximize the total early work, i.e., the parts of non-preemptive jobs executed before a common due date. By preprocessing and constructing an auxiliary instance which ... ...

    Abstract We study the early work scheduling problem on identical parallel machines in order to maximize the total early work, i.e., the parts of non-preemptive jobs executed before a common due date. By preprocessing and constructing an auxiliary instance which has several good properties, we propose an efficient polynomial time approximation scheme with running time $O(n)$, which improves the result in [Gy\"{o}rgyi, P., Kis, T. (2020). A common approximation framework for early work, late work, and resource leveling problems. {\it European Journal of Operational Research}, 286(1), 129-137], and a fully polynomial time approximation scheme with running time $O(n)$ when the number of machines is a fixed number, which improves the result in [Chen, X., Liang, Y., Sterna, M., Wang, W., B{\l}a\.{z}ewicz, J. (2020b). Fully polynomial time approximation scheme to maximize early work on parallel machines with common due date. {\it European Journal of Operational Research}, 284(1), 67-74], where $n$ is the number of jobs, and the hidden constant depends on the desired accuracy.
    Keywords Computer Science - Data Structures and Algorithms
    Subject code 518
    Publishing date 2020-07-24
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  7. Article: The spatial spillover effect of high-speed railway on CO2 emissions in China

    Li, Weidong / Jian, Jie

    Environmental and sustainability indicators. 2022 Dec., v. 16

    2022  

    Abstract: Serving as the technological innovation in transportation, the impact of the high-speed railway on carbon emissions attracted growing attention. Existing research always ignored the spatial spillover effect and regional heterogeneity of such implications. ...

    Abstract Serving as the technological innovation in transportation, the impact of the high-speed railway on carbon emissions attracted growing attention. Existing research always ignored the spatial spillover effect and regional heterogeneity of such implications. To explore the spatial effect of high-speed railways on carbon emissions, this paper constructed a Spatial Lag Model (SLM) using panel data of 283 cities in China from 2007 to 2019 and further divided data into three regions. CO₂ emissions were calculated from electricity, heating and gas consumption, and other control factors such as technology and affluence were also considered. The estimation results indicated that carbon emissions were spatially correlated, and high-speed railways negatively impacted carbon emissions. In addition, the impact of the high-speed railway was diverse and differential in the western, central and eastern region. Finally, this paper provided policy recommendations for energy saving and emission reduction.
    Keywords carbon ; carbon dioxide ; electricity ; energy ; issues and policy ; models ; railroads ; China
    Language English
    Dates of publication 2022-12
    Publishing place Elsevier Inc.
    Document type Article
    ISSN 2665-9727
    DOI 10.1016/j.indic.2022.100204
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  8. Article ; Online: Challenges encountered by parents from urban, lower social economic class in changing lifestyle behaviors of their children who are overweight or obese.

    Ma, Xiao / Li, Weidong / Rukavina, Paul B

    BMC pediatrics

    2023  Volume 23, Issue 1, Page(s) 457

    Abstract: Background: Parents from urban, lower social economic classes often encounter unique challenges in their lives, which shape how they work with their children who are overweight or obese to change their exercise and eating behaviors at home. The present ... ...

    Abstract Background: Parents from urban, lower social economic classes often encounter unique challenges in their lives, which shape how they work with their children who are overweight or obese to change their exercise and eating behaviors at home. The present study took an initial step to address a gap in the literature by describing the challenges that parents from lower social economic classes in an urban city encountered in changing exercise and eating behaviors of their children who are overweight or obese.
    Methods: A conversational style semi-structured interview with prompts and probes was conducted to 44 parents whose child is overweight or obese. Inductive content analysis and constant comparison was used to analyze the data. Data trustworthiness was established by using a variety of strategies.
    Results: Two major themes with eight sub-themes emerged from the data: Challenges to promote a healthy active lifestyle, and challenges from their child's development and lifestyle behavior. Eight sub-themes were: (1) Need for effective strategies for a lifestyle behavior change, (2) monitor and promote healthy choices, (3) money, time, and dangerous neighborhood, (4) scientific knowledge to promote a healthy active lifestyle, (5) developmental changes of adolescence, (6) unmotivated and lack of persistence, (7) sneaking eating, and (8) peer pressure.
    Conclusion: The challenges, from economic to parenting, are certainly of importance, and understanding these challenges will be crucial to help school-based professionals develop interventions. Those identified challenges should be clearly placed within family-school collaboration practices.
    MeSH term(s) Adolescent ; Child ; Humans ; Overweight ; Obesity ; Life Style ; Feeding Behavior ; Parents
    Language English
    Publishing date 2023-09-12
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2041342-7
    ISSN 1471-2431 ; 1471-2431
    ISSN (online) 1471-2431
    ISSN 1471-2431
    DOI 10.1186/s12887-023-04295-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  9. Article: Primary headache disorders: From pathophysiology to neurostimulation therapies.

    Wang, Ziying / Yang, Xiangyu / Zhao, Binglei / Li, Weidong

    Heliyon

    2023  Volume 9, Issue 4, Page(s) e14786

    Abstract: Primary headache disorders including migraine, cluster headache, and tension-type headache are among the most common disabling diseases worldwide. The unclear pathogenesis of primary headache disorders has led to high rates of misdiagnosis and limited ... ...

    Abstract Primary headache disorders including migraine, cluster headache, and tension-type headache are among the most common disabling diseases worldwide. The unclear pathogenesis of primary headache disorders has led to high rates of misdiagnosis and limited available treatment options. In this review, we have summarized the pathophysiological factors for a better understanding of primary headache disorders. Advances in functional neuroimaging, genetics, neurophysiology have indicated that cortical hyperexcitability, regional brain dysfunction, central sensitization and neuroplasticity changes play vital roles in the development of primary headache disorders. Moreover, we have also discussed a series of neurostimulation approaches with their stimulation mechanism, safety and efficacy for prevention and treatment of primary headache disorders. Noninvasive or implantable neurostimulation techniques show great promise for treating refractory primary headache disorders.
    Language English
    Publishing date 2023-03-23
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2023.e14786
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  10. Article ; Online: Bibliometrics and visual analysis of metformin and gut microbiota from 2012 to 2022: A systematic review.

    Shu, Yang / Li, Weidong / Hu, Qiongying / Xiong, Daqian

    Medicine

    2023  Volume 102, Issue 50, Page(s) e36478

    Abstract: Background: Metformin is an old drug used for the treatment of type 2 diabetes mellitus and can play a variety of roles by regulating the gut microbiota. The number of research articles on metformin in the gut microbiota has increased annually; however, ...

    Abstract Background: Metformin is an old drug used for the treatment of type 2 diabetes mellitus and can play a variety of roles by regulating the gut microbiota. The number of research articles on metformin in the gut microbiota has increased annually; however, no bibliometric tools have been used to analyze the research status and hot trends in this field. This study presents a bibliometric analysis of publications on metformin and gut microbiota.
    Methods: We searched the Web of Science core collection database on June 8, 2023, for papers related to metformin and gut microbiota from 2012 to 2022. We used Microsoft Excel 2021, VOSviewer1.6.19, CiteSpace 6.2.4, and R software package "bibliometrix" 4.0.0 to analyze the countries, institutions, authors, journals, citations, and keywords of the included publications.
    Results: We included 517 papers, and the trend in publications increased over the last 11 years. The 517 articles were from 57 countries, including 991 institutions and 3316 authors, and were published in 259 journals. China led all countries (233 papers) and the most influential institution was the Chinese Academy of Sciences (16 papers). PLOS ONE (19 papers) was the most popular journal, and Nature (1598 citations) was the most cited journal. Li and Kim were the 2 most published authors (six papers each), and Cani (272 co-citations) was the most co-cited author. "Metabolites," "aging," and "intestinal barrier" were emerging topics in this field.
    Conclusions: This bibliometric study comprehensively summarizes the research trends and progress of metformin and gut microbiota, and provides new research topics and trends for studying the effects of metformin on gut microbiota in different diseases.
    MeSH term(s) Humans ; Metformin/therapeutic use ; Gastrointestinal Microbiome ; Diabetes Mellitus, Type 2 ; Academies and Institutes ; Bibliometrics
    Chemical Substances Metformin (9100L32L2N)
    Language English
    Publishing date 2023-12-19
    Publishing country United States
    Document type Systematic Review ; Journal Article
    ZDB-ID 80184-7
    ISSN 1536-5964 ; 0025-7974
    ISSN (online) 1536-5964
    ISSN 0025-7974
    DOI 10.1097/MD.0000000000036478
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Ua VI Zs.171: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

To top