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Rheological behaviors of step ladder-structured nitrocellulose in solution and gelatinization process 认领 引用
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作者 Yu Luan Jiayi Du +2 位作者 Teng Ren Chengkai Pu Zhenggang Xiao 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第2期110-124,共15页
Step ladder-structured nitrocellulose(LNC)is a novel energetic binder prepared by chemically modifying nitrocellulose(NC)with the introduction of flexible polyethylene glycol(PEG-400)chain segments,with a regular stru... Step ladder-structured nitrocellulose(LNC)is a novel energetic binder prepared by chemically modifying nitrocellulose(NC)with the introduction of flexible polyethylene glycol(PEG-400)chain segments,with a regular structure and good performance of bonding.The step ladder-structured addresses critical limitations of NC-based propellants,including low-temperature brittleness and high sensitivity,while enhancing process safety.Although the structural,thermal,and other properties of LNC have been investigated in our previous research,there is a lack of systematic studies on the rheological properties during solution and gelatinization.The study of the relationship between the structural features and rheological properties of LNC is a key factor in guiding its gelatinization and improving the properties of LNC-based propellants.Steady-state rheology flow experiments revealed that LNC exhibited shear thinning in different solutions,which decreased with increasing concentration.It has desirable solu-bility and dispersion in N,N-dimethylformamide(DMF)solvent.The effect of solvents on the entan-glement or orientation of LNC molecular chains may be reduced.These results can be quantitatively demonstrated using the Herschel-Bulkley model.Dynamic viscoelastic studies identified a critical point of concentration-frequency of 2.5 rad/s.This particular frequency point is a turning point in the law of the effect of concentration on the loss factor(tanδ).For gelatinized systems,increasing the solvent content reduces the temperature sensitivity of the gelatinized materials.The viscosity-temperature correlation based on the Arrhenius equation allowed the optimization of the solvent content through the derived equilibrium relationship.These structure-rheological performance relationships establish basic guidelines for the precision gelatinization of LNC-based propellant,provide theoretical support for the replacement of conventional NC by LNC,and guide the gelatinization process to improve the performance of gun propellants. 展开更多
关键词 Step ladder-structured nitrocellulose Rheological properties Gelatinization
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Relationship Between Degree of Starch Gelatinization and Quality Attributes of Parboiled Rice During Steaming 认领 引用 被引量：20
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作者 Ebrahim TAGHINEZHAD Mohammad Hadi KHOSHTAGHAZA +2 位作者 Saeid MINAEI Toru SUZUKI Tom BRENNER 《Rice science》 SCIE CSCD 2016年第6期339-344,共6页
Paddy rice samples were parboiled by soaking at 65℃ for 180 min and steaming at 96℃ for 2–10 min,and then dried to achieve the final moisture content of 11% ± 1%. The degree of starch gelatinization （DSG） an... Paddy rice samples were parboiled by soaking at 65℃ for 180 min and steaming at 96℃ for 2–10 min,and then dried to achieve the final moisture content of 11% ± 1%. The degree of starch gelatinization （DSG） andseveral quality attributes （head rice yield （HRY）, color value and hardness） of parboiled rice were measured.Results showed that DSG （46.8%–77.9%）, color value （18.08–19.04） and hardness （118.6–219.2 N） allincreased following steaming. In contrast, the HRY increased （64.8%–67.1%） for steaming times between 2–4min but decreased （67.1%–65.0%） for steaming times between 4–10 min. Linear relations between DSG andcolor value （R2 = 0.87）, and DSG and hardness （R2 = 0.88） were observed. The suitable DSG of parboiled riceleading to the highest HRY was found to be 62.5%, obtained following 4 min of steaming. 展开更多
关键词 parboiling process rice head rice yield color value hardness degree of starch gelatinization
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The impact of high hydrostatic pressure treatment time on the structure,gelatinization and thermal properties and in vitro digestibility of oat starch 认领 引用 被引量：11
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作者 Jing Zhang Meili Zhang +2 位作者 Xue Bai Yakun Zhang Chen Wang 《Grain & Oil Science and Technology》 CAS 2022年第1期1-12,共12页
As a non-thermal processing technology,high hydrostatic pressure(HHP)can be used for starch modification without affecting the quality and flavour constituents.The effect of HHP on starch is closely related to the tre... As a non-thermal processing technology,high hydrostatic pressure(HHP)can be used for starch modification without affecting the quality and flavour constituents.The effect of HHP on starch is closely related to the treatment time of HHP.In this paper,we investigated the impacts of HHP treatment time(0,5,10,15,20,25,30 min)on the microstructure,gelatinization and thermal properties as well as in vitro digestibility of oat starch by scanning electron microscopy,X-ray diffraction,Fourier transform infrared spectroscopy,13C NMR and differential scanning calorimeter.Results showed that 5-min HHP treatment led to deformation and decreases in short-range ordered and doublehelix structures of oat starch granules,and further extending the treatment time to 15 min or above caused the formation of a gelatinous connection zone,increase of particle size,disintegration of short-range ordered and double-helix structures,and crystal structure change from A type to V type,indicating gelatinization occurred.Longer treatment time also resulted in the reduction in both the viscosity and the stability of oat starch.These indicated that HHP treatment time greatly influenced the microstructure of oat starch,and the oat starch experienced crystalline destruction(5 min),crystalline disintegration(15 min)and gelatinization(>15 min)during HHP treatment.Results of in vitro digestibility showed that the rapidly digestible starch(RDS)content declined first after treatment for 5 to 10 min then rose with the time extending from 15 to 30 min,indicating that longer pressure treatment time was unfavourable to the health benefits of oat starch for humans with diabetes and cardiovascular disease.Therefore,the 500-MPa treatment time for oat starch is recommended not more than 15 min.This study provides theoretical guidance for the application of HHP technology in starch modification and development of health foods. 展开更多
关键词 High hydrostatic pressure Oat starch Structure Gelatinization property Thermal property In vitro digestibility
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Variation in Gelatinization Characteristics of Storage Root Starch During Sweetpotato Growth and Development 认领 引用 被引量：3
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作者 HUANGHua-hong LUGuo-quan ZHENGYi-fan 《Agricultural Sciences in China》 2005年第6期436-442,共7页
The differential scanning calorimetry (DSC) and rapid visco-analyzer (RVA) were used to determine the starch gelatinizationcharacteristics during the growth of three sweetpotato cultivars. The results showed that the ... The differential scanning calorimetry (DSC) and rapid visco-analyzer (RVA) were used to determine the starch gelatinizationcharacteristics during the growth of three sweetpotato cultivars. The results showed that the starch contents of threesweetpotato cultivars all decreased as growth progressed. Changes of the amylose contents differing in harvesting datesshould be discriminated according to the cultivars. At the early harvests amylose contents of Xushu18 and Zheda9201were relatively high, but those of Zhe3449 were low. As the growth duration of sweetpotatoes prolonged, the peaks ofDSC thermograms tended to occur at a low temperature and not to be so obstrusive with the increased width of the peak.Obvious decreases were observed, values of onset, peak and conclusion temperatures, as well as enthalpy of phasetransitions, as growth time lengthened. The peak viscosities, as determined through RVA, showed a rising tendency asgrowth progressed. In addition, statistical analysis revealed that there were correlations between the amylose content andgelatinization characteristics to some extent, which were affected by genotypes evidently. 展开更多
关键词 Sweetpotato Starch gelatinization characteristics Growth duration DSC RVA
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Extraction Characteristics of Anthocyanins from Preliminarily-processed Products of Purple Sweet Potatoes during the Gelatinization Process 认领 引用 被引量：2
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作者 魏传斌 张萍 《Agricultural Science & Technology》 CAS 2015年第5期1084-1087,共4页
Objective] This study aimed to investigate the method for efficient utilization and development of purple sweet potatoes. [Method] Purple sweet potatoes were dried at two specific temperatures and prepared into prelim... Objective] This study aimed to investigate the method for efficient utilization and development of purple sweet potatoes. [Method] Purple sweet potatoes were dried at two specific temperatures and prepared into preliminarily-processed products for gelatinization simulation to analyze the extraction amount of anthocyanins from gelatinized samples at different gelatinization stages. [Result] During the gelatinization process, the extraction rate of anthocyanins from purple sweet potato samples reached the highest as the temperature rised from 90 ℃ to 95 ℃,and the extraction amount of anthocyanins reached the maximum at 15 min postheat preservation at 95 ℃. Purple sweet potato samples dried at 60 ℃ exhibited larger retention amount, larger maximum extraction amount and higher maximum extraction rate of anthocyanins compared with those dried at 110 ℃. [Conclusion] Drying at low temperatures and appropriately shortening the initial gelatinization stage below 90 ℃ is conducive to the retention and extraction of anthocyanins from purple sweet potatoes. 展开更多
关键词 Purple sweet potatoes Anthocyanin Starch gelatinization Extraction
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The Principles of Starch Gelatinization and Retrogradation 认领 引用 被引量：13
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作者 Masakuni Tako Yukihiro Tamaki +1 位作者 Takeshi Teruya Yasuhito Takeda 《Food and Nutrition Sciences》 CAS 2014年第3期280-291,共12页
The polysaccharides, such as κ-carrageenan, ι-carrageenan, agarose (agar), gellan gum, amylose, curdlan, alginate, and deacetylated rhamsan gum, in water changed into an ice-like structure with hydrogen bonding betw... The polysaccharides, such as κ-carrageenan, ι-carrageenan, agarose (agar), gellan gum, amylose, curdlan, alginate, and deacetylated rhamsan gum, in water changed into an ice-like structure with hydrogen bonding between polymer and water molecules, and between water-water molecules even at a concentration range of 0.1% - 1.0% (W/V) at room temperature, resulting in gelation. Such dramatic changes from liquid into gels have been understood at the molecular level in principles. In this review, we describe the structure-function relationship of starch on the view point of rheological aspects and discuss gelatinization and retrogradation mechanism including water molecules at molecular level. The starch molecules (amylose and amylopectin) play a dominant role in the center of the tetrahedral cavities occupied by water molecules, and the arrangement is partially similar to a tetrahedral structure in a gelatinization process. The arrangement should lead to a cooperative effect stabilizing extended regions of ice-like water with hydrogen bonding on the surface of the polymer molecules, where hemiacetal oxygen and hydroxyl groups might participate in hydrogen bonding with water molecules. Thus, a more extended ice-like hydrogen bonding within water molecules might be achieved in a retrogradation process. Though many investigations not only include starch gelatinization and retrogradaion, but also the gelling properties of the polysaccharides have been undertaken to elucidate the structure-function relationship, no other researchers have established mechanism at the molecular level. There is reasonable consistency in our investigations. 展开更多
关键词 Principles Starch Amylose Amylopectin Hydrogen Bonding Gelatinization and Retrogradation Mechanism
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Microscopic Structures of Endosperms Before and After Gelatinization in Rice Varieties with Varied Grain Quality 认领 引用 被引量：1
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作者 YANGZe－min WANGWei－jin +3 位作者 LANSheng－yin XUZhen－xiu ZHOUZhu－qing WA 《Agricultural Sciences in China》 2003年第1期113-118,F003,T002,共6页
The microscopic structures of the endosperm of indica rice varieties with different quality before and after gelatinization were observed using scanning electron microscope. The results showed that the degree of gelat... The microscopic structures of the endosperm of indica rice varieties with different quality before and after gelatinization were observed using scanning electron microscope. The results showed that the degree of gelatinization varied in different parts of the grain and in different varieties under the same experimental conditions. The gelatinization of dorsal side was the most complete. Its cells were decomposed totally into puff-like or flocculent materials. The ventral side gelatinized less thoroughly, appearing agglomerate and some cell frames were still visible. The middle part gelatinized most incompletely and the cells were still integrated. Evident differences in gelatinization were observed among different varieties, the dorsal, ventral and middle parts of high quality varieties gelatinized more thoroughly than those of the corresponding parts of low quality varieties respectively. An obvious concavity often appeared in the middle of the cross-section of the low quality grains while the cross-section of high quality grains was normally flat. The same phenomenon was noted when comparing the early maturing indica rice and the late maturing indica rice. Varietal difference of gelatinization in dorsal sides was not as distinct as in middle parts and ventral sides. The difference among dorsal side, middle part and ventral side in gelatinization was greater in low quality grains than that of high quality grains. In addition, a lot of ruptured cells were observed in the cross-section of high quality rice, while few of them could be found in the low quality rice. Apparently, the number of ruptured cells is positively correlated with rice quality. Quality of rice grain also has positive correlation with the rate of water absorption and extension. High rates of water absorption and extension lead to better gelatinization of rice grain, and hence indicate good quality. 展开更多
关键词 Indica rice Grain quality Gelatinization Microscopic structure
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Native versus processed oat endosperm microstructures:mechanisms driving starch digestibility and gelatinization behavior 认领 引用
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作者 Wenjuan Feng Zhihao Huang +3 位作者 Bo Pan Tao Zhang Zhengyu Jin Ming Miao 《Food Bioscience》 SCIE 2025年第11期1053-1062,共10页
This study elucidates how native oat endosperm microstructures,namely multicellular aggregates(IC-1)and isolated single cells(IC-2),modulate starch behavior during thermal processing and enzymatic digestion.During hea... This study elucidates how native oat endosperm microstructures,namely multicellular aggregates(IC-1)and isolated single cells(IC-2),modulate starch behavior during thermal processing and enzymatic digestion.During heating(85-95℃),the native endosperm cells exhibited 14.6-16.9 g/g lower swelling power and 11.5%-13.5%smaller solubility increments compared to processed oat starch(OS).These constrained hydration behaviors were mechanistically linked to structural barriers imposed by cell wall assemblies and multicellular spatial organization.Consequently,the native systems displayed restricted gelatinization with lower enthalpy and reduced peak viscosity.Crucially,IC-1 and IC-2 attenuated enzymatic digestion,with final hydrolysis rates 40.6%and 18.5%lower than OS,respectively.Post-cooking resistant starch(RS)retention in IC-1(42.5%)and IC-2(26.5%)markedly exceeded that of OS(6.5%)and mechanically disrupted cells(17.9%-21.5%).Microstructural analysis disclosed that in cooked IC-1 post 120-min INFOGEST digestion,intact starch granules linked to curtailed enzymatic penetration(Confocal Laser Scanning Microscope visualization).These findings underscore the critical role of native oat endosperm structures state in nutrient preservation,thermal resistance,and controlled digestibility,providing theoretical support for developing high-value oat starch applications in functional foods. 展开更多
关键词 Oat intact cells Starch gelatinization Thermal stability In vitro digestibility
Differential effects of daytime and nighttime high temperatures at the grain formation stage on starch structure and properties in waxy maize 认领 引用
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作者 Jing Li Xiaotian Gu +3 位作者 Lingling Qu Guanghao Li Jian Guo Dalei Lu 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第8期3218-3227,共10页
High temperature(HT)is a critical abiotic stress factor that negatively impacts yield and quality of maize worldwide.Although the effects of HT during key growth stages are extensively documented,the distinct influenc... High temperature(HT)is a critical abiotic stress factor that negatively impacts yield and quality of maize worldwide.Although the effects of HT during key growth stages are extensively documented,the distinct influences of daytime versus nighttime HT on the physicochemical properties of waxy maize starch remain largely unexplored.This study investigated the effects of daytime and nighttime HT on the on the starch physicochemical properties in two waxy maize hybirds.Temperature treatments included ambient temperature(NN),daytime HT(DH),nighttime HT(NH),and whole-day HT(DNH),which were applied from 1 to 15 days after pollination.The three HT stresses significantly inhibited starch synthesis and accumulation,increased the number of pores on the starch granule surface,enlarged starch granule size,enhanced relative crystallinity,and shortened the chain length and reduced the branching degree of amylopectin.The most severe effects were observed under DNH,followed by DH.DH and DNH reduced starch pasting viscosity and gelatinization enthalpy while increasing starch retrogradation through mechanisms involving enlargement of granule size,increased relative crystallinity,and reduced branching and chain length of amylopectin.NH increased gelatinization enthalpy and retrogradation and decreased starch pasting viscosity primarily by shortening the chain length of amylopectin.By elucidating the mechanisms through which daytime and nighttime HT affect starch physicochemical properties,this study provides valuable insights into optimizing waxy maize production in response to climate change challenges. 展开更多
关键词 waxy maize high temperature starch granule size amylopectin chain length pasting property gelatinization property
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ALK,the Key Gene for Gelatinization Temperature,is a Modifier Gene for Gel Consistency in Rice 认领 引用 被引量：42
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作者 Zhenyu Gao Dali Zeng +10 位作者 Fangmin Cheng Zhixi Tian Longbiao Guo Yan Su Meixian Yan Hua Jiang Guojun Dong Yuchen Huang Bin Han Jiayang Li Qian Qian 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2011年第9期756-765,共10页
Gelatinization temperature（GT） is an important parameter in evaluating the cooking and eating quality of rice.Indeed,the phenotype,biochemistry and inheritance of GT have been widely studied in recent times.Previous... Gelatinization temperature（GT） is an important parameter in evaluating the cooking and eating quality of rice.Indeed,the phenotype,biochemistry and inheritance of GT have been widely studied in recent times.Previous map-based cloning revealed that GT was controlled by ALK gene,which encodes a putative soluble starch synthase II-3.Complementation vector and RNAi vector were constructed and transformed into Nipponbare mediated by Agrobacterium.Phenotypic and molecular analyses of transgenic lines provided direct evidence for ALK as a key gene for GT.Meanwhile,amylose content,gel consistency and pasting properties were also affected in transgenic lines.Two of four nonsynonymous single nucleotide polymorphisms in coding sequence of ALK were identified as essential for GT.Based on the single nucleotide polymorphisms（SNPs）,two new sets of SNP markers combined with one cleaved amplified polymorphic sequence marker were developed for application in rice quality breeding. 展开更多
关键词 ALK gelatinization temperature gel consistency rice.
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Map-based cloning of the ALK gene,which controls the gelatinization temperature of rice 认领 引用 被引量：32
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作者 高振宇 曾大力 +5 位作者 崔霞 周奕华 颜美仙 黄大年 李家洋 钱前 《Science China(Life Sciences)》 CAS 2003年第6期661-668,共8页
Gelatinization temperature (GT) is an important parameter for evaluating the cooking and eating quality of rice besides amylose content (AC). The inheritance of the genes affecting GT has been widely studied and is co... Gelatinization temperature (GT) is an important parameter for evaluating the cooking and eating quality of rice besides amylose content (AC). The inheritance of the genes affecting GT has been widely studied and is considered to be controlled by a major gene. Here, we report the map-based cloning of rice ALK that encodes the soluble starch synthase II (SSSII). Comparison between the DNA sequences from different rice varieties, together with the results obtained with digestion of the rice seeds in alkali solution, indicates that the base substitutions in coding se-quence of ALK may cause the alteration in GT. 展开更多
关键词 rice (Oryza sativa L.) ALK soluble starch synthase II gelatinization temperature map-based cloning.
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Targeting VEGFR2 inhibition within a spatially-confined conduit promotes nerve self-resolution and alleviates mechanical allodynia 认领 引用
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作者 Xiaobin Luo Toshitatsu Nagayasu +23 位作者 Yuhao Zhang Zhi He Jia Yang Chengli Li Guman Duan Qunchuan Zong Yun Liu Kaiyuan Yang Kaige Mao Pengchao Ma Zifan Li Yating Zhao Kunkoo Kim Jie Zhang Zide Wang Yuyang Luo Jingsong Lu Sengpav Tong Jia-kuo Yu Zhe Zhao Zheng Cao Shuhui Yang Yongwei Pan Xiumei Wang 《Bioactive Materials》 SCIE CSCD 2026年第8期47-63,共17页
Stump neuromas represent nonfunctional redundant tissue that frequently elicits neuropathic pain through disorganized axonal regeneration,pathological angio-genesis,scar hyperplasia,and chronic neuroinflammation.Curre... Stump neuromas represent nonfunctional redundant tissue that frequently elicits neuropathic pain through disorganized axonal regeneration,pathological angio-genesis,scar hyperplasia,and chronic neuroinflammation.Current therapeutic strategies fail to adequately address the underlying pathophysiology,particularly the excessive production of reactive oxygen species resulting from dysregulated vascular proliferation and activation.To tackle this issue,we developed photocrosslinked gelatin methacryloyl(GelMA)microspheres covalently functionalized with methacryloyl-modified anti-VEGFR2 peptides(MAVP)to modulate patho-logical angiogenesis.These functionalized microspheres were fabricated into linear arrays via 3D printing and integrated within a progressively spatial-constrictive conduit.This platform facilitated the self-resolution of the nerve end interface,including sustained suppression of VEGFR2 phosphorylation and coordinated mechanotransduction signaling,thereby inhibiting neuroinflammatory responses and angiogenesis.In a sciatic nerve ligation model,GelMAMAVP MPs system demonstrated markedly superior analgesic efficacy over the conventional VEGFR2 inhibitor vandetanib.In a stump neuroma model,GelMAMAVP MPs effectively normalized the peripheral end interface microenvironment by inhibiting neovascularization,M1 macrophage polarization,and fibrotic scar formation.Furthermore,GelMAMAVP MPs distributed in the peripheral nerve stumps indirectly downregulated pain-related proteins(TRPA1/CGRP)in dorsal root ganglia and suppressed spinal microglial activation.Overall,this study presents a comprehensive and safe vascular-targeted strategy promoting nerve end interface self-resolution and prevention of neuropathic pain. 展开更多
关键词 chronic neuroinflammationcurrent neuropathic pain stump neuromas mechanical allodynia photocrosslinked gelatin methacryloyl microspheres photocrosslinked gelatin vegfr inhibition disorganized axonal regenerationpathological
Fabrication and characteristics of decellularized amniotic membrane-based nanofiber composite for tissue repair 认领 引用
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作者 Jinwen Xiao Xiaojun Ai +5 位作者 Conglai Zhou Ruiqi Feng Junrong Chen Juan Wu Xiongbo Song Long Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第5期458-461,共4页
Decellularized amniotic membrane(d AM)holds significant potential in tissue engineering;however,its inherent mechanical limitations and rapid degradation hinder its clinical translation.This study integrates d AM with... Decellularized amniotic membrane(d AM)holds significant potential in tissue engineering;however,its inherent mechanical limitations and rapid degradation hinder its clinical translation.This study integrates d AM with high molecular weight polymer polycaprolactone(PCL)and natural gelatin(Gel)nanofibers using electrospinning technology and a 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide/N-hydroxysuccinimide(EDC/NHS)covalent crosslinking system to produce two composite biomaterials.Both PCL-d AM and Gel-d AM composites demonstrate enhanced strain,tensile strength,and elasticity compared to pure d AM,showcasing improved mechanical properties and significantly reduced degradation rates,with Gel-d AM exhibiting superior overall performance.Gel-d AM also shows considerably better compatibility with fibroblasts,macrophages,and tendon stem cells than PCL-d AM,suggesting that it more effectively supports cell adhesion,proliferation,and differentiation,thus providing a more favorable microenvironment for tissue repair.In macrophage immune modulation,Gel-d AM significantly promotes the polarization of macrophages toward the M2 phenotype,exhibiting potential anti-inflammatory and repair-enhancing effects,thereby offering new insights into the use of d AM in tissue regeneration.These advancements open new possibilities for the clinical application of d AM,particularly in tissue repair and wound dressing. 展开更多
关键词 Decellularized amniotic membrane Electrospinning Nanofiber Polycaprolactone Gelatin
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Encapsulation of Antarctic krill oil in alginate-gelatin hydrogel alleviates hyperlipidemia in high-fat-diet fed rats 认领 引用
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作者 Xuan Ma Yiming Wei +6 位作者 Yi He Chenrui Zhao Qin Chen Bo Liu Tao Wei Wenjie Yan Feng Wang 《Food Science and Human Wellness》 SCIE CAS CSCD 2026年第1期253-262,共10页
Krill oil is effective in reducing blood lipid levels,particularly in individuals with severe hyperlipidemia.However,poor water insolubility and stability limited its usage.This study investigated a method for encapsu... Krill oil is effective in reducing blood lipid levels,particularly in individuals with severe hyperlipidemia.However,poor water insolubility and stability limited its usage.This study investigated a method for encapsulating Antarctic krill oil using alginate(ALG)and gelatin(GLN)to enhance its stability and bioactivity.The encapsulation efficiency,functional group integrity,swelling rate,and lipid-lowering activity were assessed.Results indicated that the optimal encapsulation conditions were identified with an ALG:GLN ratio of 2:1(m/m),coagulation bath of 9%CaCl2,and a nozzle size of 750μm,resulting in 69.34%encapsulation efficiency.Fourier-transform infrared spectroscopy confirmed successful encapsulation.The ALG-GLN shell materials enriched astaxanthin in krill oil and protected it from harsh gastric conditions,enabling targeted intestinal release.In a high-fat diet-induced rat model,krill oil microcapsules significantly reduced triglycerides(TG),total cholesterol(TC),and low-density lipoprotein-cholesterol(LDL-C)levels while increasing high-density lipoprotein-cholesterol(HDL-C)levels compared to unencapsulated krill oil.Additionally,the microcapsules elevated nitric oxide(NO)levels,enhanced superoxide dismutase(SOD)activity,and reduced malondialdehyde(MDA)levels,liver and perirenal fat weight.Therefore,encapsulating Antarctic krill oil in alginate-gelatin hydrogel offers a promising strategy for managing hyperlipidemia and associated metabolic disorders. 展开更多
关键词 Krill oil Microcapsule Alginate,gelatin High-fat diet
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Cancellous Bone-Like Sr-Doped Hydroxyapatite/Gelatin Porous Scaffolds With Nanofibrous Architecture and Ion Release for Promoting Osteogenesis 认领 引用
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作者 Yin‑Chuan Wang Zhao‑Rui Lv +6 位作者 Shuo‑Fu Liang Meng Zhang Hong‑Jin Xue Yi‑Feng Xiong Yong‑Gang Li Gui‑Yong Xiao Yu‑Peng Lu 《Rare Metals》 SCIE EI CAS CSCD 2026年第4期835-855,共21页
Constructing a porous scaffold with the essential features of natural cancellous bone,including structural architecture and biochemical cues,is one of the pivotal factors for effective bone regeneration.In this study,... Constructing a porous scaffold with the essential features of natural cancellous bone,including structural architecture and biochemical cues,is one of the pivotal factors for effective bone regeneration.In this study,a biomimetic composite porous Gelatin fibrous scaffold(SrHA/Gelatin)incorporating ultralong strontium-doped hydroxyapatite nanofibers was fabricated via thermally induced phase separation and paraffin sphere leaching technologies.The porous scaffold exhibited an interconnected macroporous network with a fibrous framework.SrHA nanofibers incorporated into the scaffold created an extracellular matrixlike microenvironment although simultaneously providing excellent elasticity,mechanical resilience,and abundant sites for cell anchoring.Importantly,substitution of Ca2+ by Sr2+ in the hydroxyapatite(HA)crystal lattice accelerated nanofiber degradation and enabled the sustained release of Ca2+ and Sr2+ ions,thereby establishing a dynamic osteoinductive microenvironment.In vitro studies showed that the SrHA/Gelatin scaffold significantly enhanced adhesion,proliferation,and migration of bone marrow mesenchymal stem cells,as well as upregulated expression of the osteogenic gene compared with Gelatin and HA/Gelatin scaffolds.Furthermore,in vivo experiments revealed that the scaffold induced robust trabecular bone formation and defect bridging in rat calvarial defects,whereas only limited repair was observed in the control group.This study demonstrates that the SrHA/Gelatin porous scaffold integrates mechanical robustness,structural biomimicry,and dynamic ionic release,representing a promising candidate for bone defect repair. 展开更多
关键词 biomimetic scaffold bone repair Gelatin Sr‑doped hydroxyapatite nanofiber
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Bionic Design of Copper-doped Mesoporous Silica with Enhanced Hydrogel Mechanical Properties and its Promising Application in Bone-defect Regeneration 认领 引用
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作者 Han Yang Ya Fang +9 位作者 Jiaming Cui Xueheng Sun Tianchang Wang Liang Feng Hao Yang Changru Zhang Bide Xu Xiaojun Zhou Jinwu Wang Xudong Wang 《Journal of Bionic Engineering》 SCIE EI CSCD 2026年第1期311-325,共15页
Treating bone defects complicated by bacterial infections remains a significant clinical challenge.Drawing inspiration from the human body's bone repair mechanisms,the use of biomimetic methods to design tissue en... Treating bone defects complicated by bacterial infections remains a significant clinical challenge.Drawing inspiration from the human body's bone repair mechanisms,the use of biomimetic methods to design tissue engineering scaffolds is of great significance for bone repair.This study synthesized copper(Cu)-doped mesoporous silica nanoparticles(Cu@MSN)modified with hydroxyethyl methacrylate to obtain methacrylated Cu@MSN(Cu@MSNMA).Furtheremore,bio-mimetic nanocomposite hydrogels were prepared by adding Cu@MSNMA to a GelMA/gelatin solution.This hydrogel achieves multi-modal bone tissue biomimicry:(ⅰ)GelMA/gelatin mimics the matrix components in bone ECM,ensuring biocompatibility while promoting cellular behavior(such as adhesion,proliferation,and differentiation);(ⅱ)GelMA/gela-tin and the crosslinking sites introduced by Cu@MSNMA form a stable porous network structure,achieving structural and mechanical biomimicry to provide necessary support for bone defects;(ⅲ)The elemental biomimicry of Si and Cu in Cu@MSNMA achieves efficient osteogenic induction.The effect of different proportions of Cu@MSNMA on the physi-cal properties of the composite hydrogels was investigated to determine the optimal proportion.The results indicated that the mechanical properties of hydrogel were enhanced with the increasing Cu@MSNMA mass ratio.Notably,5%NPs/GelMA/gelatin hydrogel exhibited excellent mechanical property compared to the GelMA/gelatin hydrogel.In vitro and vivo cellular experiments demonstrated a significant enhancement in antibacterial and osteogenic induction with Cu@MSNMA addition.In conclusion,the proposed nanocomposite hydrogel with biomimetic components and ion-regulating properties can serve as a multifunctional scaffold,offering antimicrobial properties for infected bone regeneration,and guide for future research in bone regeneration and three-dimensional printing. 展开更多
关键词 Bone defect repair Methacrylated gelatin Copper-doped mesoporous silica nanoparticles Bionic strategy Bone tissue engineering
Novel bromoacetophenone-accelerated visible-light 3D and 4D printing methods for rapid fabrication of biocompatible and structurally dynamic scaffolds 认领 引用
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作者 Nima Tabatabaei Rezaei Kartikeya Dixit +5 位作者 Ashna Rajeev Karla Villegas Giovanniantonio Natale Frederic Menard Hitendra Kumar Keekyoung Kim 《Bio-Design and Manufacturing》 SCIE EI CAS CSCD 2026年第2期379-398,I0078-I0086,共20页
Rapid and accurate visible-light photopolymerization is essential for advancing bioprinted engineered tissues.In this study,we developed a novel three-component photoinitiator system for visible light-induced crosslin... Rapid and accurate visible-light photopolymerization is essential for advancing bioprinted engineered tissues.In this study,we developed a novel three-component photoinitiator system for visible light-induced crosslinking of gelatin methacryloyl(GelMA)hydrogels,designed to improve polymerization kinetics,mechanical strength,and structural integrity.Incorporation of 2-bromoacetophenone(BAP)considerably accelerated photopolymerization,with reaction rates increasing alongside BAP concentration,enabling the rapid fabrication of stable hydrogel scaffolds.Printing experiments confirmed that BAP promoted fast crosslinking of GelMA bioinks under visible light,reducing printing time while preserving high-resolution structural features.Additionally,the incorporation of BAP induced microscale structural transformations in the hydrogels during hydration,as evidenced by scanning electron microscopy imaging and swelling analyses.This unique property enabled the fabrication of multilayer constructs exhibiting time-dependent deformation,demonstrating four-dimensional(4 D)printing ca pabilities.Moreover,biocompatibility evaluations revealed that cells maintained high viability in BAP-containing hydrogels.Overall,the BAP-based photoinitiator system offers a promising strategy for high-speed,high-resolution bioprinting,combining enhanced mechanical performance,reduced fabrication time,and dynamic structural adaptability-features that make it highly suitable for advanced biofabrication and tissue engineering applications. 展开更多
关键词 Gelatin methacryloyl(GelMA) Bioink Photoredox Visible light crosslinking Digital light processing(DLP)rapid three-dimensional(3D)bioprinting Four-dimensional(4D)bioprinting
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A biodegradable film based on sodium alginate-gelatin involving a mulberry anthocyanin extract for fish oil packaging 认领 引用
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作者 Yawen Lv Jingjing Yang +1 位作者 Ting Luo Hongmei Liao 《Food Innovation and Advances》 2026年第1期133-144,共12页
Driven by the'dual carbon'strategy and the imperative of a circular economy,food packaging is undergoing a ternary upgrade.In this study,mulberry anthocyanin extract(MAE)was upcycled into a natural,dual-functi... Driven by the'dual carbon'strategy and the imperative of a circular economy,food packaging is undergoing a ternary upgrade.In this study,mulberry anthocyanin extract(MAE)was upcycled into a natural,dual-function active principle that concurrently delivers antioxidant capacity and ultraviolet(UV)barrier activity.It was incorporated with an edible sodium alginate-gelatin(SG)based film to engineer a next-generation biodegradable antioxidant film.The dose-dependent impacts of MAE on the film's mechanical signature,radical-scavenging efficacy,optical performance,and practical utility in fish oil packaging were systematically examined.MAE obtained from a residue of mulberry juice fermentation had 296.86 mg/g total polyphenols and 146.50 mg/g anthocyanins,primarily cyanidin-3-glucoside and cyanidin-3-rutinoside.When 0.2 mg/mL MAE(SG-2MAE)was added,the tensile strength of SG films increased from 48.33 to 50.98 MPa.When 0.4 mg/mL MAE was incorporated,the antioxidant activity of SG-4MAE film against 2,2'-biazido-bis-3-ethylbenzothiazoline-6-sulfonic acid(ABTS)increased by 158%,whereas transmittance(600 nm)decreased by 33.7%,indicating enhanced UV blocking.When applied for packaging fish oil,the SG-MAE film delayed oxidation better than the unpackaged sample after 4 weeks'storage by directly blocking oxygen,releasing antioxidant constituents,and adsorbing residual oxygen.In summary,SG-MAE films showed excellent comprehensive properties and high antioxidant properties,and could be used as active packaging materials for fish oil. 展开更多
关键词 biodegradable film sodium alginate gelatin UV barrier activity antioxidant capacity economyfood packaging mulberry anthocyanin extract circular economy anthocyanin extract mae
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Sodium pyrophosphate-mediated deconstruction of divalent cation bridging for impairing sewer sludge adhesion:in-situ self-cleaning by gravity sewage flow 认领 引用 被引量：1
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作者 Heliang Pang Xiyi Chen +7 位作者 Qiao Wei Xingwang Li Huining Xu Chunwei Wang Yong Liu Jun Wang Bo Zhang Jinsuo Lu 《ENGINEERING Environment》 SCIE EI CAS CSCD 2026年第2期217-231,共15页
Extracellular polymeric substances(EPS)play a crucial role in maintaining the colloidal structure of sewer sludge,which can lead to significant siltation in sewage systems.In this study,a sodium pyrophosphate(SP)-medi... Extracellular polymeric substances(EPS)play a crucial role in maintaining the colloidal structure of sewer sludge,which can lead to significant siltation in sewage systems.In this study,a sodium pyrophosphate(SP)-mediated divalent cation chelation strategy was proposed for disrupting divalent cation bridging and macromolecular material entanglement in EPS structure in sewer sludge to achieve adhesion degradation.At the SP dosage of 0.25 g/g TS,the total amount of extractable EPS was found to have increased 2.17 times significantly,accompanied by disruption and outward migration of gelatinous EPS.Concurrently,the functional groups transfer of macromolecules and the structural transformation of aromatic proteins were initiated.In this instance,the microbial cells were lysed,facilitating the molecular deconstruction and solubilization of aromatic proteins,humic acids and carbohydrates.The deterioration of the EPS network and the breakdown of gelatinous biopolymers resulted in significantly reduced sludge cohesion.As a consequence,the mean adhesion force decreased from 4.00 to 2.37 nN,while the total suspended solids(TSS)concentration in the effluent increased by 48.59 times,indicating substantial sludge dissolution and flotation.The loss of divalent cation bridging further increased the surface electronegativity of the sludge matrix,reducing its resistance to hydraulic erosion.In this case,sewer sludge particles could be transported downstream by gravity scouring of the effluent flow.This study demonstrates the feasibility of SP-mediated EPS disruption as an effective in-situ self-cleaning strategy for sewer system management,providing a sustainable solution for mitigating siltation and improving sewer hydraulic efficiency. 展开更多
关键词 Sewer sludge Sodium pyrophosphate Extracellular polymeric substances Gelatinous structure
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Understanding the influence ofβ-glucan-based superabsorbent hydrogel on the digestibility of wheat starch:Gelatinization,rheological and structural properties 认领 引用 被引量：3
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作者 Yiming Jiang Xinan Zeng +5 位作者 Yi Wu Tingyi Zhou Shiqi Zhang Juncai Leng Yi Le Wei Zhao 《Food Bioscience》 SCIE 2024年第4期2146-2155,共10页
This study aims to evaluate the effects ofβ-glucan-based superabsorbent hydrogel(βCHY)on wheat starch digestibility and elucidate the underlying mechanism.The results revealed that the incorporation ofβCHY led to a... This study aims to evaluate the effects ofβ-glucan-based superabsorbent hydrogel(βCHY)on wheat starch digestibility and elucidate the underlying mechanism.The results revealed that the incorporation ofβCHY led to a significant reduction in rapidly digestible starch content of wheat starch from 71%to 44%,while concurrently increasing the levels of slowly digestible starch and resistant starch in a dose-dependent manner.From a mechanistic perspective,incorporatingβCHY into wheat starch notably affected their pasting behavior and influenced the rheological properties and gel strength of resulting gels.Moreover,the addition ofβCHY increased the relative crystallinity,short-range ordered degree(R1047/1024),molecular order(the full width at half maximum at 480 cm-1),and thermal stability of the starch,suggesting the formation of a more stable and ordered structure.Furthermore,the wheat starch-βCHY gel complexes exhibited large,discrete layered structures with thicker layer walls,accompanied by interspersed filament-like structures.These structural alterations may collectively contribute to the reduced digestibility of wheat starch.These findings confirmed the positive effects ofβCHY on the starch digestibility,offering valuable insights into the development of innovative starch-based foods with slow digestion characteristics. 展开更多
关键词 Starch digestibility Hydrogel Gelatinization properties Rheological property Structure-function relationship
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