LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 75

Search options

  1. Article: Toward interface optimization of transparent wood with wood color and texture by silane coupling agent

    Zhou, Jichun / Xu, Wei

    Journal of materials science. 2022 Mar., v. 57, no. 10

    2022  

    Abstract: This experiment aims to optimize the interface compatibility between the wood template and the resin through silane coupling agent KH550, so as to improve the optical and mechanical properties of transparent wood with solid wood color and texture, and ... ...

    Abstract This experiment aims to optimize the interface compatibility between the wood template and the resin through silane coupling agent KH550, so as to improve the optical and mechanical properties of transparent wood with solid wood color and texture, and provide a theoretical basis for the application of new materials in the fields of home design and manufacturing. In this study, silane coupling agent was used to directly modify the wood templates from which partial lignin was removed, and then, epoxy resin E57 matched with the refractive index of the wood templates was introduced, and samples were obtained after impregnation and curing. Then, the orthogonal experiment method was used to explore the process conditions used when the optical performance of the samples reached the optimal (the transmittance was 87.5%, and the haze was 35.39% at 800 nm wavelength): KH550 concentration 5 wt%, 20 min, 25 °C. And the order of the influence of various factors on the light transmittance of the samples was: reaction temperature > reaction time > KH550 concentration. Then, through infrared test, X-ray diffraction patterns and electron microscopy, it was concluded that KH550 made more chemical bonds between the wood template and the resin, so the overall interface compatibility of the sample became better. Therefore, the light transmittance, tensile strength and elongation at break of the samples modified by KH550 were significantly improved, and the haze was significantly reduced. In addition, transparent wood still retains part texture of solid wood, which is also the feature of this new material.
    Keywords X-ray diffraction ; color ; electron microscopy ; epoxides ; lignin ; refractive index ; silane ; temperature ; tensile strength ; texture ; transmittance ; wavelengths ; wood
    Language English
    Dates of publication 2022-03
    Size p. 5825-5838.
    Publishing place Springer US
    Document type Article
    ZDB-ID 2015305-3
    ISSN 1573-4803 ; 0022-2461
    ISSN (online) 1573-4803
    ISSN 0022-2461
    DOI 10.1007/s10853-022-06974-7
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  2. Article ; Online: Letter to the Editor:

    Asaleh, Amir / Zhou, Jichun / Rahmanian, Narges

    Human gene therapy

    2022  Volume 33, Issue 21-22, Page(s) 1213–1216

    MeSH term(s) Humans ; Semantics ; COVID-19 Vaccines/genetics ; COVID-19/prevention & control ; Vaccination ; mRNA Vaccines
    Chemical Substances COVID-19 Vaccines
    Language English
    Publishing date 2022-11-14
    Publishing country United States
    Document type Letter
    ZDB-ID 1028152-6
    ISSN 1557-7422 ; 1043-0342
    ISSN (online) 1557-7422
    ISSN 1043-0342
    DOI 10.1089/hum.2022.29223.aas
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Nano-Silica/Urea-Formaldehyde Resin-Modified Fast-Growing Lumber Performance Study

    Weng, Mengyun / Zhu, Yetong / Mao, Weiguo / Zhou, Jichun / Xu, Wei

    Forests. 2023 July 13, v. 14, no. 7

    2023  

    Abstract: To promote the performance of fast-growing poplar wood for furniture applications, this study proposes and investigates the feasibility of modifying fast-growing poplar wood with a urea-formaldehyde resin impregnating agent by adding nano-SiO₂ as a way ... ...

    Abstract To promote the performance of fast-growing poplar wood for furniture applications, this study proposes and investigates the feasibility of modifying fast-growing poplar wood with a urea-formaldehyde resin impregnating agent by adding nano-SiO₂ as a way to improve its physical and mechanical properties. By observing the solubility of nano-SiO₂ addition in urea-formaldehyde resin, determine the optimal ratio of nano-SiO₂ addition to the solid content of the urea-formaldehyde resin solution. After the fast-growing poplar specimens were treated with nano-SiO₂/UF resin, the water absorption, wet swelling, dry shrinkage, nail grip, flexural strength, and modulus of flexural elasticity of the fast-growing poplar specimens were compared and analyzed to determine the effect of impregnation modification and the optimal impregnation ratio. The results showed that the physical and mechanical properties of fast-growing poplar wood were significantly improved by impregnating the fast-growing poplar wood with urea-formaldehyde resin with SiO₂, and the impregnation modification was beneficial to reducing the wet swelling and dry shrinkage of poplar wood, increasing its dimensional stability, improve the grip nail strength, and increase the flexural strength and flexural modulus of elasticity with the increase in nano-SiO₂ concentration.
    Keywords Populus ; dimensional stability ; furniture ; lumber ; modulus of elasticity ; modulus of rupture ; shrinkage ; solubility ; urea formaldehyde ; water uptake ; wood
    Language English
    Dates of publication 2023-0713
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2527081-3
    ISSN 1999-4907
    ISSN 1999-4907
    DOI 10.3390/f14071440
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  4. Article: Effects of High-Temperature Heat Treatment Modification by Impregnation on Physical and Mechanical Properties of Poplar.

    Xue, Jixiao / Xu, Wei / Zhou, Jichun / Mao, Weiguo / Wu, Shuangshuang

    Materials (Basel, Switzerland)

    2022  Volume 15, Issue 20

    Abstract: To expand the application range of fast-growing poplar, a modification method of poplar impregnated with nano- ... ...

    Abstract To expand the application range of fast-growing poplar, a modification method of poplar impregnated with nano-SiO
    Language English
    Publishing date 2022-10-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma15207334
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Properties of Multilayer Transparent Bamboo Materials.

    Wu, Yan / Wang, Jing / Wang, Yajing / Zhou, Jichun

    ACS omega

    2021  Volume 6, Issue 49, Page(s) 33747–33756

    Abstract: The objective of this study is to solve the shortcomings of the current transparent bamboo veneer with a small thickness and low light transmittance by means of lamination. The delignified bamboo templates were vacuum impregnated with an epoxy resin, and ...

    Abstract The objective of this study is to solve the shortcomings of the current transparent bamboo veneer with a small thickness and low light transmittance by means of lamination. The delignified bamboo templates were vacuum impregnated with an epoxy resin, and the impregnated bamboo templates were laminated with the same radial texture using the viscosity of the epoxy resin to obtain multilayer transparent bamboo (MLTB). The multilayer stacking method can greatly improve the optical and mechanical properties of transparent bamboo. The transparent bamboo with a thickness of 1.2 mm and the delignified bamboo with a volume fraction of 44.8% prepared by multilayer stacking exhibited an improved total optical transmissivity of up to 78.6%, while the highest transmittance of bamboo (0.9 mm thick) without multilayer stacking treatment was only 10.4%. Compared with the single-layer transparent bamboo with a thickness of 2.1 mm, the maximum tensile strength of the seven-layer transparent bamboo was 4 times that of the single-layer transparent bamboo. Therefore, MLTB can compensate to a certain extent for the low light transmission and poor mechanical properties of single-layer transparent bamboo. Overall, MLTB shows a richer and more layered texture, which has more esthetic value. It is a kind of natural transparent material with good light transmittance and excellent mechanical properties, which has a good development prospect as a structural material in the fields of construction, household, and electronic products.
    Language English
    Publishing date 2021-12-03
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.1c05014
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: A highly transparent compressed wood prepared by cell wall densification

    Wang, Yajing / Wu, Yan / Yang, Feng / Yang, Lechen / Wang, Jingxian / Zhou, Jichun / Wang, Jing

    Wood science and technology. 2022 Mar., v. 56, no. 2

    2022  

    Abstract: In this work, the top-down modification method is used to densify wood cell walls. The cell wall was simply compressed. The external force is applied to the delignified wood template by using a press to make the radial thickness of the wood template ... ...

    Abstract In this work, the top-down modification method is used to densify wood cell walls. The cell wall was simply compressed. The external force is applied to the delignified wood template by using a press to make the radial thickness of the wood template smaller, and finally, a more compact and uniform wood template with cell wall skeleton is obtained. Then, the resin with similar refractive index to cell wall is vacuum impregnated into the dense wood template, and the transparent compressed wood with high transparency is successfully obtained. The transmittance is increased by 34.1%, the haze decreased by 28.1%, and the transparent effect is more excellent through the cell wall densification of the delignification template. Moreover, the transparent compressed wood has better mechanical properties (maximum tensile strength was 113.75 MPa, Young's modulus was 2.276 GPa) and thermal stability. The method has successfully improved the function and structure of transparent wood, and the highly transparent compressed wood is a new functional material with application potential.
    Keywords cell walls ; compressed wood ; delignification ; modulus of elasticity ; refractive index ; skeleton ; technology ; tensile strength ; thermal stability ; transmittance ; wood
    Language English
    Dates of publication 2022-03
    Size p. 669-686.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 241313-9
    ISSN 0043-7719
    ISSN 0043-7719
    DOI 10.1007/s00226-022-01372-3
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  7. Article ; Online: Patients achieved pCR during neoadjuvant chemotherapy had better outcome than adjuvant chemotherapy setting in breast cancer: A comparative study.

    Chen, Jida / Jin, Lidan / Chen, Lini / Bian, Zilong / Li, Zhaoqing / Cao, Shuyin / Zhou, Jichun / Xu, Ling / Zhao, Wenhe / Wang, Qinchuan

    Cancer treatment and research communications

    2023  Volume 36, Page(s) 100719

    Abstract: Purpose: Pathological complete response(pCR) during neoadjuvant chemotherapy(NAC) has been proposed as a predictor for better prognosis in breast cancer. However, few studies compare the outcomes of patients receiving NAC and adjuvant chemotherapy(AC).!# ...

    Abstract Purpose: Pathological complete response(pCR) during neoadjuvant chemotherapy(NAC) has been proposed as a predictor for better prognosis in breast cancer. However, few studies compare the outcomes of patients receiving NAC and adjuvant chemotherapy(AC).
    Methods: We retrospectively matched the patients who received NAC(N = 462) and AC(N = 462) by age, time of diagnosis, and primary clinical stage using the propensity score match in breast cancer patients treated in Sir Run Run Shaw Hospital with the median follow up of 67 months. Death from breast cancer and recurrence were used as endpoints. A multivariable Cox models were used to estimate the hazard ratios for breast-cancer specific survival (BCSS) and DFS. A multivariable logistic regression model was simulated to predict pCR.
    Results: In patients who received NAC, 18.0%(83/462) patients achieved pCR, while the rest of the patients did not. pCR subgroup demonstrated significant better BCSS and DFS than patients receiving AC(BCSS: HR = 0.39, 95% CI:0.12-0.93, P = 0.03; DFS: HR = 0.16, 95%CI 0.009-0.73, P = 0.013) and non-pCR patients(BCSS: HR = 0.32, 95%CI 0.10-0.77, P = 0.008; DFS: HR = 0.12, 95%CI 0.007-0.55, P = 0.002). Patients who received AC demonstrated insignificant survival compared to non-pCR patients(BCSS: HR= 0.82, 95%CI 0.62-1.10, P = 0.19; DFS: HR = 0.75, 95%CI 0.53-1.07, P = 0.12). Patients with AC had significant better DFS than non-pCR patients(HR = 0.33, 95% CI 0.10-0.94, P = 0.04) in luminal B Her2+ patients. More NAC cycles(>2), TNBC, lower cT stage, and mixed histology indicate higher possibility of pCR(AUC = 0.89).
    Conclusion: pCR patients with NAC indicated better prognosis than patients receiving AC or non-pCR patients from NAC. The timing of chemotherapy may need carefully pondering in luminal B Her2+ patients.
    MeSH term(s) Humans ; Child, Preschool ; Female ; Breast Neoplasms/drug therapy ; Breast Neoplasms/genetics ; Neoadjuvant Therapy ; Retrospective Studies ; Prognosis ; Chemotherapy, Adjuvant
    Language English
    Publishing date 2023-05-10
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2468-2942
    ISSN (online) 2468-2942
    DOI 10.1016/j.ctarc.2023.100719
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article: Incidence and risk factors of lymph node metastasis in breast cancer patients without preoperative chemoradiotherapy and neoadjuvant therapy: analysis of SEER data.

    Luo, Mingpeng / Lin, Xixi / Hao, Dingji / Shen, Kangle Wang / Wu, Wenxin / Wang, Linbo / Ruan, Shanming / Zhou, Jichun

    Gland surgery

    2023  Volume 12, Issue 11, Page(s) 1508–1524

    Abstract: Background: Breast cancer (BC) is the leading cause of death in the female reproductive system, often linked to lymph node involvement, indicating poor prognosis. This study investigated lymph node metastasis incidence and risk factors in M0 stage BC ... ...

    Abstract Background: Breast cancer (BC) is the leading cause of death in the female reproductive system, often linked to lymph node involvement, indicating poor prognosis. This study investigated lymph node metastasis incidence and risk factors in M0 stage BC patients who hadn't received preoperative chemoradiotherapy or neoadjuvant therapy. We explored the influence of various factors on lymph node metastasis.
    Methods: We conducted a retrospective analysis using Surveillance, Epidemiology, and End Results data from BC patients diagnosed between 2010 and 2015. Binary logistic regression and propensity score matching (PSM) assessed significant factors in BC patients without preoperative treatment. We developed predictive nomograms and evaluated model performance using the concordance index, calibration curve, area under the curve, and decision curve analysis.
    Results: Among 256,504 eligible BC patients, 25.57% had lymph node metastasis. Multivariate logistic regression revealed associations between lymph node metastasis and younger age, African-American ethnicity, central/nipple location, lobular carcinoma, human epidermal growth factor receptor 2 (HER2)-positive status, grade III classification, and T3 stage. PSM confirmed these findings. Interactions were identified between age, race, primary site, histology, breast subtype, grade, and T stage, all influencing lymph node metastasis.
    Conclusions: This retrospective study identified lymph node metastasis in female BC patients with distinct clinicopathological characteristics who received no preoperative treatment. We constructed valuable nomograms, revealing that: (I) young age (<35 years), African-American race, central/nipple location, infiltrating duct carcinoma, HER2 positivity, high histological grade (grade III), and larger tumor size are risk factors for regional lymph node metastasis; (II) lymph node metastasis may not solely represent the invasive nature of triple-negative BC; (III) patients with different BC subtypes in T1c-T2 stages may benefit from individualized neoadjuvant treatment strategies.
    Language English
    Publishing date 2023-11-17
    Publishing country China (Republic : 1949- )
    Document type Journal Article
    ZDB-ID 3016969-0
    ISSN 2227-8575 ; 2227-684X
    ISSN (online) 2227-8575
    ISSN 2227-684X
    DOI 10.21037/gs-23-258
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Targeting pyroptosis in breast cancer: biological functions and therapeutic potentials on It.

    Chen, Cong / Ye, Qianwei / Wang, Linbo / Zhou, Jichun / Xiang, Aizhai / Lin, Xia / Guo, Jufeng / Hu, Shufang / Rui, Tao / Liu, Jian

    Cell death discovery

    2023  Volume 9, Issue 1, Page(s) 75

    Abstract: Pyroptosis is a lytic and inflammatory type of programmed cell death that is mediated by Gasdermin proteins (GSDMs). Attractively, recent evidence indicates that pyroptosis involves in the development of tumors and can serve as a new strategy for cancer ... ...

    Abstract Pyroptosis is a lytic and inflammatory type of programmed cell death that is mediated by Gasdermin proteins (GSDMs). Attractively, recent evidence indicates that pyroptosis involves in the development of tumors and can serve as a new strategy for cancer treatment. Here, we present a basic knowledge of pyroptosis, and an overview of the expression patterns and roles of GSDMs in breast cancer. In addition, we further summarize the available evidence of pyroptosis in breast cancer progression and give insight into the clinical potential of applying pyroptosis in anticancer strategies for breast cancer. This review will deepen our understanding of the relationship between pyroptosis and breast cancer, and provide a novel potential therapeutic avenue for breast cancer.
    Language English
    Publishing date 2023-02-23
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2058-7716
    ISSN 2058-7716
    DOI 10.1038/s41420-023-01370-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: Predictive and prognostic biomarkers of bone metastasis in breast cancer: current status and future directions.

    Wang, Shenkangle / Wu, Wenxin / Lin, Xixi / Zhang, Kevin Matthew / Wu, QingLiang / Luo, Mingpeng / Zhou, Jichun

    Cell & bioscience

    2023  Volume 13, Issue 1, Page(s) 224

    Abstract: The most common site of metastasis in breast cancer is the bone, where the balance between osteoclast-mediated bone resorption and osteoblast-mediated bone formation is disrupted. This imbalance causes osteolytic bone metastasis in breast cancer, which ... ...

    Abstract The most common site of metastasis in breast cancer is the bone, where the balance between osteoclast-mediated bone resorption and osteoblast-mediated bone formation is disrupted. This imbalance causes osteolytic bone metastasis in breast cancer, which leads to bone pain, pathological fractures, spinal cord compression, and other skeletal-related events (SREs). These complications reduce patients' quality of life significantly and have a profound impact on prognosis. In this review, we begin by providing a brief overview of the epidemiology of bone metastasis in breast cancer, including current diagnostic tools, treatment approaches, and existing challenges. Then, we will introduce the pathophysiology of breast cancer bone metastasis (BCBM) and the animal models involved in the study of BCBM. We then come to the focus of this paper: a discussion of several biomarkers that have the potential to provide predictive and prognostic value in the context of BCBM-some of which may be particularly compatible with more comprehensive liquid biopsies. Beyond that, we briefly explore the potential of new technologies such as single-cell sequencing and organoid models, which will improve our understanding of tumor heterogeneity and aid in the development of improved biomarkers. The emerging biomarkers discussed hold promise for future clinical application, aiding in the prevention of BCBM, improving the prognosis of patients, and guiding the implementation of personalized medicine.
    Language English
    Publishing date 2023-12-01
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2593367-X
    ISSN 2045-3701
    ISSN 2045-3701
    DOI 10.1186/s13578-023-01171-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top