LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 6190

Search options

  1. Article: The superiority of Pd

    Wang, Yanyan / Dong, Minghua / Li, Shaopeng / Chen, Bingfeng / Liu, Huizhen / Han, Buxing

    Chemical science

    2024  Volume 15, Issue 15, Page(s) 5525–5530

    Abstract: The hydrogenation of ... ...

    Abstract The hydrogenation of CO
    Language English
    Publishing date 2024-03-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 2559110-1
    ISSN 2041-6539 ; 2041-6520
    ISSN (online) 2041-6539
    ISSN 2041-6520
    DOI 10.1039/d3sc06925g
    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.

  2. Article ; Online: Dechlorination Helps Defluorination: Insights into the Defluorination Mechanism of Florfenicol by S-nZVI and DFT Calculations on the Reaction Pathways.

    Chen, Zhenhuan / Chen, Jingdan / Tan, Shendong / Yang, Zilin / Zhang, Yanyan

    Environmental science & technology

    2024  Volume 58, Issue 5, Page(s) 2542–2553

    Abstract: Defluorination is essential to eliminate the antibiotic resistance and detrimental effects of florfenicol ( ... ...

    Abstract Defluorination is essential to eliminate the antibiotic resistance and detrimental effects of florfenicol (C
    MeSH term(s) Iron ; Density Functional Theory ; Reproducibility of Results ; Trichloroethylene ; Water Pollutants, Chemical ; Thiamphenicol/analogs & derivatives
    Chemical Substances florfenicol (9J97307Y1H) ; Iron (E1UOL152H7) ; Trichloroethylene (290YE8AR51) ; Water Pollutants, Chemical ; Thiamphenicol (FLQ7571NPM)
    Language English
    Publishing date 2024-01-23
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5851
    ISSN (online) 1520-5851
    DOI 10.1021/acs.est.3c07435
    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.

    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.

  3. Article ; Online: Diversity-Aware Marine Predators Algorithm for Task Scheduling in Cloud Computing.

    Chen, Dujing / Zhang, Yanyan

    Entropy (Basel, Switzerland)

    2023  Volume 25, Issue 2

    Abstract: With the increase in cloud users and internet of things (IoT) applications, advanced task scheduling (TS) methods are required to reasonably schedule tasks in cloud computing. This study proposes a diversity-aware marine predators algorithm (DAMPA) for ... ...

    Abstract With the increase in cloud users and internet of things (IoT) applications, advanced task scheduling (TS) methods are required to reasonably schedule tasks in cloud computing. This study proposes a diversity-aware marine predators algorithm (DAMPA) for solving TS in cloud computing. In DAMPA, to enhance the premature convergence avoidance ability, the predator crowding degree ranking and comprehensive learning strategies were adopted in the second stage to maintain the population diversity and thereby inhibit premature convergence. Additionally, a stage-independent control of the stepsize-scaling strategy that uses different control parameters in three stages was designed to balance the exploration and exploitation abilities. Two case experiments were conducted to evaluate the proposed algorithm. Compared with the latest algorithm, in the first case, DAMPA reduced the makespan and energy consumption by 21.06% and 23.47% at most, respectively. In the second case, the makespan and energy consumption are reduced by 34.35% and 38.60% on average, respectively. Meanwhile, the algorithm achieved greater throughput in both cases.
    Language English
    Publishing date 2023-02-02
    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/e25020285
    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.

  4. Article: C-reactive protein-to-albumin ratio and neutrophil-to-albumin ratio for predicting response and prognosis to infliximab in ulcerative colitis.

    Zhang, Yanyan / Xu, Feng / Li, Ya / Chen, Bing

    Frontiers in medicine

    2024  Volume 11, Page(s) 1349070

    Abstract: The C-reactive protein-to-albumin ratio (CAR) and neutrophil-to-albumin ratio (NAR) serve as established markers for inflammatory diseases. However, limited studies have investigated their potential in predicting response and prognosis following ... ...

    Abstract The C-reactive protein-to-albumin ratio (CAR) and neutrophil-to-albumin ratio (NAR) serve as established markers for inflammatory diseases. However, limited studies have investigated their potential in predicting response and prognosis following infliximab (IFX) treatment. The objective of this paper was to evaluate feasibility of CAR and NAR as biomarkers to assess response to IFX induction therapy. Additionally, we attempted to determine the capacity to predict clinical remission in ulcerative colitis (UC) after 54 weeks of IFX treatment. We enrolled a total of 157 UC patients diagnosed via endoscopic mucosal biopsy at our hospital between October 2018 and June 2023. Additionally, 199 patients presenting with gastrointestinal symptoms, who underwent physical examinations, constituted the control group. Comprehensive clinical data, laboratory indicators, and endoscopic findings were systematically collected. CAR and NAR values were computed before treatment, post-induction, and subsequently at 8-week intervals. Comparisons between two groups were analyzed using the Wilcoxon rank-sum test or the independent samples
    Language English
    Publishing date 2024-03-12
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2775999-4
    ISSN 2296-858X
    ISSN 2296-858X
    DOI 10.3389/fmed.2024.1349070
    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.

  5. Article ; Online: Iris neovascularization and neurotrophic keratopathy following ultrasound cycloplasty in refractory glaucoma: case series.

    Chen, Zidong / Wu, Yanyan / Yu, Minbin

    BMC ophthalmology

    2024  Volume 24, Issue 1, Page(s) 188

    Abstract: Background: Ultrasound cycloplasty is a noninvasive surgery used to reduce intraocular pressure in patients with glaucoma, with fewer severe complications. This report presents several cases of iris neovascularization and neurotrophic keratopathy ... ...

    Abstract Background: Ultrasound cycloplasty is a noninvasive surgery used to reduce intraocular pressure in patients with glaucoma, with fewer severe complications. This report presents several cases of iris neovascularization and neurotrophic keratopathy following ultrasound cycloplasty.
    Case presentation: Six patients diagnosed with refractory glaucoma underwent ultrasound cycloplasty at our clinic. Three cases developed iris neovascularization at postoperative day 3, week 2 and week 4 respectively, with intraocular pressure ranging from 12 to 24 mmHg. The other three cases developed neurotrophic keratopathy at postoperative week 3, week 6 and week 8 which completely healed within 60 days.
    Conclusions: Iris neovascularization and neurotrophic keratopathy can be triggered after ultrasound cycloplasty, which are uncommon and self-limited but potentially vision-threatening. Preoperative risk assessment and regular postoperative follow-up are recommended to manage complications effectively.
    MeSH term(s) Humans ; Female ; Male ; Middle Aged ; Intraocular Pressure/physiology ; Iris/surgery ; Iris/blood supply ; Iris/diagnostic imaging ; Aged ; Glaucoma/surgery ; Neovascularization, Pathologic ; Corneal Diseases/surgery ; Corneal Diseases/etiology ; Postoperative Complications ; Adult
    Language English
    Publishing date 2024-04-23
    Publishing country England
    Document type Journal Article ; Case Reports
    ZDB-ID 2050436-6
    ISSN 1471-2415 ; 1471-2415
    ISSN (online) 1471-2415
    ISSN 1471-2415
    DOI 10.1186/s12886-024-03460-3
    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.

  6. Article ; Online: The effects and mechanisms of natural products on

    Deng, Ruiyi / Chen, Xu / Zhao, Shiqing / Zhang, Qingying / Shi, Yanyan

    Frontiers in cellular and infection microbiology

    2024  Volume 14, Page(s) 1360852

    Abstract: Helicobacter ... ...

    Abstract Helicobacter pylori
    MeSH term(s) Humans ; Helicobacter pylori ; Helicobacter Infections/drug therapy ; Drug Therapy, Combination ; Anti-Bacterial Agents/pharmacology ; Anti-Bacterial Agents/therapeutic use ; Medicine, Traditional
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2024-02-28
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2619676-1
    ISSN 2235-2988 ; 2235-2988
    ISSN (online) 2235-2988
    ISSN 2235-2988
    DOI 10.3389/fcimb.2024.1360852
    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.

  7. Article ; Online: Joint Active and Passive Beamforming in RIS-Assisted Secure ISAC Systems.

    Chen, Jinsong / Wu, Kai / Niu, Jinping / Li, Yanyan

    Sensors (Basel, Switzerland)

    2024  Volume 24, Issue 1

    Abstract: This paper investigates joint beamforming in a secure integrated sensing and communications (ISAC) system assisted by reconfigurable intelligent surfaces (RIS). The system communicates with legitimate downlink users, detecting a potential target, which ... ...

    Abstract This paper investigates joint beamforming in a secure integrated sensing and communications (ISAC) system assisted by reconfigurable intelligent surfaces (RIS). The system communicates with legitimate downlink users, detecting a potential target, which is a potential eavesdropper attempting to intercept the downlink communication information from the base station (BS) to legitimate users. To enhance the physical-layer secrecy of the system, we design and introduce interference signals at the BS to disrupt eavesdroppers' attempts to intercept legitimate communication information. The BS simultaneously transmits communication and interference signals, both utilized for communication and sensing to guarantee the sensing and communication quality. By jointly optimizing the BS active beamformer and the RIS passive beamforming matrix, we aim to maximize the achievable secrecy rate and radiation power of the system. We develop an effective scheme to find the active beamforming matrix through fractional programming (FP) and semi-definite programming (SDP) techniques and obtain the RIS phase shift matrix via a local search technique. Simulation results validate the effectiveness of the proposed methods in enhancing communication and sensing performance. Additionally, the results demonstrate the effectiveness of introducing the interference signals and RIS in enhancing the physical-layer secrecy of the ISAC system.
    Language English
    Publishing date 2024-01-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2052857-7
    ISSN 1424-8220 ; 1424-8220
    ISSN (online) 1424-8220
    ISSN 1424-8220
    DOI 10.3390/s24010289
    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.

  8. Article ; Online: Primary Pulmonary Malignant Meningioma: A Case Report and Literature Review Focusing on Imaging Findings.

    Zhu, Ping / Zhu, Yanyan / Chen, Feng

    Current medical imaging

    2024  

    Abstract: Background: Primary pulmonary meningioma (PPM) is an extremely rare primary tumor of the lung. The diagnosis should first exclude metastasis of central nervous system MPM by using imaging, and the final diagnosis depends mainly on the tissue pathology ... ...

    Abstract Background: Primary pulmonary meningioma (PPM) is an extremely rare primary tumor of the lung. The diagnosis should first exclude metastasis of central nervous system MPM by using imaging, and the final diagnosis depends mainly on the tissue pathology and immunohistochemical results. Malignant PPM is even rarer, and a clear pathological definition to distinguish between benign and malignant PPM is lacking.
    Case presentation: A 47-year-old woman was admitted to the hospital after a lung mass was found during a physical examination one month earlier. The imaging findings for this patient showed a large mass in the lower lobe of the left lung with bronchial invasion. A contrast-enhanced MRI of the brain was normal. Bronchoscopy shows a mass at the opening of the left lower basal branch, with mucosal infiltration, protrusion, and stenosis of the opening. The patient underwent radical left lung cancer surgery, and the pathology specimens stained with hematoxylin-eosin demonstrated tumor cells with the focal invasion of the bronchial cartilage. Immunohistochemical staining was positive for epithelial membrane antigen(EMA), somatostatin receptor 2 (SSTR2), progesterone receptor (PR), Ki-67 (5%-10%), CD34, and D2-40 and weakly positive for p53.The pathologic diagnosis was primary pulmonary meningioma (PPM). The tumor marker CA-125 had significantly increased in the 2 months after surgery.
    Conclusion: Malignant PPM is rarer, and a clear pathological definition to distinguish between benign and malignant PPM is lacking. Potential cases should be comprehensively evaluated based on imaging, laboratory, and pathology results. A long-term regular follow-up will be required to rule out metastasis or recurrence of PPM.
    Language English
    Publishing date 2024-01-05
    Publishing country United Arab Emirates
    Document type Case Reports
    ISSN 1573-4056
    ISSN (online) 1573-4056
    DOI 10.2174/0115734056273353231124075003
    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.

    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.

  9. Article ; Online: Online electrochemistry coupling liquid chromatography-mass spectrometry for rapid investigation on the phase I and phase II simulated metabolic reactions of flavonoids.

    Niu, Yanyan / Chen, Yuxue / Zhou, Juan / Sun, Wei

    Analytical and bioanalytical chemistry

    2024  Volume 416, Issue 10, Page(s) 2541–2551

    Abstract: In this study, an online electrochemistry coupling high-performance liquid chromatography-mass spectrometry (EC-HPLC-MS) technology has been developed for simulating metabolic reactions and rapid analysis of metabolites of flavone, quercetin, and rutin, ... ...

    Abstract In this study, an online electrochemistry coupling high-performance liquid chromatography-mass spectrometry (EC-HPLC-MS) technology has been developed for simulating metabolic reactions and rapid analysis of metabolites of flavone, quercetin, and rutin, which are not only widely present compounds with pharmacological activity in nature, but also have structural similarity and variability. The simulated metabolic processes of the substrates (phase I and phase II metabolism) were implemented on the surface of glassy carbon electrode (GCE) by using different electrochemical methods. After online chromatographic separation, the products were transmitted to a mass spectrometer for detection, in order to speculate relevant reaction pathways and structural information of the reaction product. The main metabolites, including methylation, hydroxylation, hydrolysis, and conjugation reaction products, had been successfully identified through the designed in situ hyphenated technique. Furthermore, compared with metabolites produced by in vitro incubation of rat liver microsomes, it was found that the products of electrochemical simulated metabolism were more abundant with diverse metabolic pathways. The results indicated that the proposed method exhibited advantages in the sample pretreatment process and detection cycle without compromising the reliability and accuracy of the results.
    MeSH term(s) Animals ; Rats ; Chromatography, High Pressure Liquid/methods ; Electrochemistry ; Flavonoids/metabolism ; Liquid Chromatography-Mass Spectrometry ; Microsomes, Liver/metabolism ; Oxidation-Reduction ; Reproducibility of Results
    Chemical Substances Flavonoids
    Language English
    Publishing date 2024-03-07
    Publishing country Germany
    Document type Clinical Trial, Phase I ; Clinical Trial, Phase II ; Journal Article
    ZDB-ID 201093-8
    ISSN 1618-2650 ; 0016-1152 ; 0372-7920
    ISSN (online) 1618-2650
    ISSN 0016-1152 ; 0372-7920
    DOI 10.1007/s00216-024-05227-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 4' 69/97: Show issues
    Archiv 3: Show issues
    Z 9.4: 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.

  10. Article ; Online: Proteomic Biomarkers of Intrahepatic Cholestasis of Pregnancy.

    Zeng, Weijian / Hou, Yanyan / Gu, Wei / Chen, Zheng

    Reproductive sciences (Thousand Oaks, Calif.)

    2024  

    Abstract: Intrahepatic cholestasis of pregnancy (ICP) is a pregnancy-specific liver disease, which can lead to adverse fetal outcomes, including preterm labor and intrauterine death. The pathogenesis of ICP is still unclear. We hypothesized that pathological index ...

    Abstract Intrahepatic cholestasis of pregnancy (ICP) is a pregnancy-specific liver disease, which can lead to adverse fetal outcomes, including preterm labor and intrauterine death. The pathogenesis of ICP is still unclear. We hypothesized that pathological index leads to abnormal placenta changes in ICP. Investigation of these differences in protein expression in parallel profiling is essential to understand the comprehensive pathophysiological mechanism underlying ICP. The present study screened differentially expressed proteins (DEPs) as novel diagnostic markers for ICP. Proteomic profiles of placental tissues from 32 ICP patients and 24 healthy volunteers (controls) were analyzed. Our founding was valid by following western blotting and immunohistochemistry staining, respectively. The association of the key protein expression with clinicopathological features of ICP was further analyzed. A total of 178 DEPs were identified between the ICP and control groups. Functional enrichment analysis showed these proteins were significantly enriched in the PPAR singling pathway by KEGG and PPARα/RXRα activation by IPA. Apolipoprotein A2 (APOA2) was the only upregulated protein, which uniquely identified in ICP groups and related to both pathways. Validation of western blotting and immunohistochemical staining analysis showed significantly higher APOA2 expression in the ICP group than in the control group. Furthermore, the expression of APOA2 is associated with clinicopathological features in ICP groups. Receiver operating characteristic (ROC) curve analyses showed that the AUC of APOA2 was 0.8984 (95% confidence interval (CI): 0.772-1.000). This study has identified up-regulated APOA2 associated with PPAR singling pathway and PPARα/RXRα activation in ICP. Thus, APOA2 may be involved in ICP pathogenesis, serving as a novel biomarker for its diagnosis.
    Language English
    Publishing date 2024-01-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2276411-2
    ISSN 1933-7205 ; 1933-7191
    ISSN (online) 1933-7205
    ISSN 1933-7191
    DOI 10.1007/s43032-023-01437-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 4113: 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.

To top