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The research and development of high-strength and high-toughness metal coordination hydrogels (MC-HG) for flexible electronic sensing has become an international frontier in the field of advanced functional polymer materials, which has wide application significance and important scientific value. However, the traditional soaking method is difficult to control the permeation and combination of metal ions, resulting in weak mechanical properties. In this paper, a screening strategy based on sodium acetate (SA) was proposed to promote the metal complex permeation first and then combination with functional ligands, thus obtaining a homogeneous metal coordination hydrogel (Fe-HGSA), whose breaking strength and toughness (1. 546 MPa/2. 139 MJ/m³) were much higher than those of traditional soaking method (0. 832 MPa/0. 919 MJ/m³) and common aqueous solution rearrangement method (1. 126 MPa/1. 352 MJ/m³). Due to its excellent mechanical properties and good electrical conductivity, Fe-HGSA has potential applications in the field of flexible force sensors. [ABSTRACT FROM AUTHOR]

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Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

骨组织工程是以成骨细胞、骨髓基质干细胞或软骨细胞等为种子细胞，经体外培养扩增后，种植于具有良 好生物相容性、生物可降解性的骨组织工程支架上，骨组织工程支架承担细胞外基质作用，从而为骨再生提供良好 的环境。3D 打印技术通过计算机辅助设计，利用生物材料与细胞、生物活性因子结合打印缺损组织，能够快速、精 确地复制和重建缺损组织或器官。在 3D 打印骨组织工程支架中，打印耗材尤为重要，利用单一材料打印的骨组织 工程支架在性能上往往存在局限性，而由两种或多种不同材料组成的复合材料，如金属与生物陶瓷、聚合材料与生 物陶瓷等，能够充分发挥材料间的互补作用，提高支架的生物相容性和机械性能，逐渐成为骨组织工程支架的首选 打印耗材。因此，在颌面骨再生中3D打印复合材料骨组织工程支架具有较高的临床应用价值。 [ABSTRACT FROM AUTHOR]

Copyright of Feed Research is the property of Editorial Board of Feed Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objectives] The research was aimed to study the effect of a nano-iron oxide(ferrihydrite) on maize growth and antioxidant system and to provide theory basis for ferrihydrite used as a new iron fertilizer on maize growth. [Methods] Deionized water(CK1) was set up as control while a series of ferrihydrite, i.e. 10, 20, 50, 100, 200 and 500 mg·L-1 were used as treatments during seed germination. Then seedlings were transferred to 1/2 Hoagland solution without iron(CK2) and with EDTA chelated iron(CK3) while a series of ferrihydrite, i.e. 10, 20, 50, 100, 200 and 500 mg·L-1 with CK2 solution were used as treatments. The biological and physiological indicators as well as cell micro-morphological structures were determined during maize seed germination and seedling growth. [Results] The seed germination experiment results showed that the germination index, the vigor index and the average root length increased significantly by 38.33%, 61.99% and 53.91%, respectively, and the average germination time reduced by 56.63%, when the concentration of ferrihydrite was 20 mg·L-1 as compared with CK1. The seedling growth experiment results showed that the fresh weight of shoot, root of length and chlorophyll content increased significantly by 15.38%, 10.03% and 24.85% as compared with the CK2, when the concentration of ferrihydrite was 20 mg·L-1. Concentration higher than 50 mg·L-1 had damaged maize growth. Ferrihydrite concentrations of less than 20 mg·L-1 increased POD and CAT activities in maize leaves. However, the concentrations of more than 20 mg·L-1 led to the gradual reduction of POD and CAT activities. In addition, results of leaf Fe determination and transmission electron microscopy observation showed that ferrihydrite at the concentration of 10 mg·L-1 could enter the root cells of maize and significantly increased the content of iron in shoot by 75% as compared with CK2. However, higher ferrihydrite concentration of more than 20 mg·L-1 resulted in the plasmolysis of root cell. [Conclusions] The promoting effect of ferrihydrite on seed germination and growth of maize seedlings suggested that low lever ferrihydrite(10-20 mg·L-1) could be used as an alternative for EDTA-Fe, whereas high concentrations of ferrihydrite(≥ 50 mg·L-1) damaged maize growth [ABSTRACT FROM AUTHOR]

[Objectives]This study was aimed to use agricultural by-products soybean meal and rice husk as the natural culture medium to produce antimicrobial and antioxidant hydrolysates from Bacillus amyloliquefaciens XZ-173 in a mixed solid-liquid fermentation systems and to characterize the antioxidant activities of the hydrolysates.[Methods]After the fermentation process was carried out at 30℃ for 60 h,the fermentation crude extract(FCE)and the surfactant crude product(SCP) were obtained by suction filtration and acid precipitation method,respectively. Their antioxidant activities and reduction capability were evaluated.[Results]SCP had better surface activities and bacteriostasis than FCE,but FCE had better anti-oxidant activity than SCP. At the concentration of 2.0 mg·mL-1,the scavenging rates of ABTS+,DPPH,hydroxyl and superoxide anion radicals by FCE reached 33.88%,40.07%,29.19% and 88.50%,respectively. In contrast,SCP had relatively low activity in the removal of these radicals. FCE had higher capacity than SCP as indicated by the T-AOC and reducing power tests.[Conclusions]FCE was able to remove multiple oxidative radicals. Therefore,the products from microbial fermentation of soybean meal and rice husk were able to be used as natural active additives for the development of new food and feed products. [ABSTRACT FROM AUTHOR]

Copyright of West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Non-coding microRNAs (microRNAs, miRNAs) are able to regulate the expression of target genes at the post-transcriptional level. Altered miRNA levels are associated with the pathological development of diabetes, insulin resistance, inflammation and various cancers. The miRNAs profiles express differently in the serum and follicular fluid of women with polycystic ovary syndrome (PCOS). Altered miRNA levels may participate in the development of PCOS. Here, we summarize the effects of miR-93, miR-222, miR-92a/b, miR-224, miR- 320, miR-9, miR-483-5p, miR-513a-3p, miR-24, miR-133b, miR-26b and miR-378 in insulin resistance, steroid hormone synthesis and secretion, granule cell proliferation, follicular development dysplasia and ovulation disorder in PCOS patients, so as to explore the roles of miRNAs in the pathogenesis of PCOS. [ABSTRACT FROM AUTHOR]