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Mechanical Behavior of Soybean Protein Fibers
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作者 杨庆斌 孙亚宁 +1 位作者 田琳 于伟东 《Journal of Donghua University(English Edition)》 EI CAS 2009年第1期85-88,共4页
In order to understand the relationship between the mechanical property and the effect of bleaching and dyeing to the soybean protein fibers(SPF),four mechanical models are chosen.The tensile and relaxation property o... In order to understand the relationship between the mechanical property and the effect of bleaching and dyeing to the soybean protein fibers(SPF),four mechanical models are chosen.The tensile and relaxation property of the soybean protein fibers are analyzed.The tensile and relaxation curves are fitted with the suitable model.It shows that the relaxation property of SPF is in accordance with the standard linear solid model.Estimates of the Hookean spring modulus at 8% and at 10% are different,so some structural modifications could be produced by the strain.Bleached fibers show a higher level of relaxation than raw fibers and dyed fibers.Bleaching has a remarkable influence on decreasing tenacity at break for each test modality.Knotted and looped modalities decrease fiber tenacity remarkably in all three samples. 展开更多
关键词 soybean protein fiber tensile property relaxation property
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Modeling the Tensile Properties of Soybean Protein Yarns 被引量:1
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作者 石风俊 崔世忠 《Journal of Donghua University(English Edition)》 EI CAS 2003年第4期150-153,共4页
The tensile properties of a series of soybean protein yarns are tested in USTER THINKPAID Ⅲ. A nonlinear viscoelastic model has been proposed to describe the tensile behavior of soybean protein yarns. The model is co... The tensile properties of a series of soybean protein yarns are tested in USTER THINKPAID Ⅲ. A nonlinear viscoelastic model has been proposed to describe the tensile behavior of soybean protein yarns. The model is composed of a Maxwell element, a linear spring and a nonlinear spring. The tensile properties of soybean protein yam are analyzed. The stress-strain curves of the yams are fitted. The average breaking tenacity and specific work of rupture are calculated using the average breaking strain. Comparisons indicate that theoretical predictions conform the experimental results very well. 展开更多
关键词 soybean protein fiber YARN nonlinear viscoelastic model broken tenacity breaking strain specific work of rupture
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Effects of dietary protein restriction on muscle fiber characteristics and m TORC1 pathway in the skeletal muscle of growing-finishing pigs 被引量:13
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作者 Yinghui Li Fengna Li +10 位作者 Li Wu Hongkui Wei Yingying Liu Tiejun Li Bie Tan Xiangfeng Kong Kang Yao Shuai Chen Fei Wu Yehui Duan Yulong Yin 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2017年第1期170-181,共12页
Background: To investigate the effects of dietary crude protein(CP) restriction on muscle fiber characteristics and key regulators related to protein deposition in skeletal muscle, a total of 18 growing-finishing p... Background: To investigate the effects of dietary crude protein(CP) restriction on muscle fiber characteristics and key regulators related to protein deposition in skeletal muscle, a total of 18 growing-finishing pigs(62.30 ± 0.88 kg)were allotted to 3 groups and fed with the recommended adequate protein(AP, 16 % CP) diet, moderately restricted protein(MP, 13 % CP) diet and low protein(LP, 10 % CP) diet, respectively. The skeletal muscle of different locations in pigs, including longissimus dorsi muscle(LDM), psoas major muscle(PMM) and biceps femoris muscle(BFM) were collected and analyzed.Results: Results showed that growing-finishing pigs fed the MP or AP diet improved(P 〈 0.01) the average daily gain and feed: gain ratio compared with those fed the LP diet, and the MP diet tended to increase(P = 0.09) the weight of LDM. Moreover, the ATP content and energy charge value were varied among muscle samples from different locations of pigs fed the reduced protein diets. We also observed that pigs fed the MP diet up-regulated(P 〈 0.05) muscular m RNA expression of all the selected key genes, except that myosin heavy chain(My HC) IIb,My HC IIx, while m RNA expression of ubiquitin ligases genes was not affected by dietary CP level. Additionally, the activation of mammalian target of rapamycin complex 1(m TORC1) pathway was stimulated(P 〈 0.05) in skeletal muscle of the pigs fed the MP or AP diet compared with those fed the LP diet.Conclusion: The results suggest that the pigs fed the MP diet could catch up to the growth performance and the LDM weight of the pigs fed the AP diet, and the underlying mechanism may be partly due to the alteration in energy status, modulation of muscle fiber characteristics and m TORC1 activation as well as its downstream effectors in skeletal muscle of different locations in growing-finishing pigs. 展开更多
关键词 Dietary protein restriction Energy status Growing-finishing pigs m TORC1 Muscle fiber type
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Recent developments in artificial spider silk and functional gel fibers 被引量:3
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作者 Abdul Qadeer Khan Muhammad Shafiq +4 位作者 Jiatian Li Kaiqing Yu Zunfeng Liu Xiang Zhou Meifang Zhu 《SmartMat》 2023年第6期31-55,共25页
It is highly desirable to develop fiber materials with high strength and toughness while increasing fiber strength always results in a decrease in toughness.Spider silk is a natural fiber material with an excellent co... It is highly desirable to develop fiber materials with high strength and toughness while increasing fiber strength always results in a decrease in toughness.Spider silk is a natural fiber material with an excellent combination of high strength and toughness,which is produced from the spinning dope solution by gelation and drawing spinning process.This encourages people to prepare artificial fibers by mimicking the material,structure,and spinning of natural spider silk.In this review,we first summarized the preparation of artificial spider silk prepared via such a gelation process from different types of materials,including nonrecombinant proteins,recombinant proteins,polypeptides,synthetic polymers,and polymer nanocomposites.In addition,different spinning approaches for spinning artificial spider silk are also summarized.In the third section,some novel application scenarios of the artificial spider silk were summarized,such as artificial muscles,sensing,and smart fibers. 展开更多
关键词 BIOMIMETIC fiber spinning hydrogel fibers polymer composites polymer fibers protein fibers strong and tough fibers
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Moisture Content and Nutrient Composition of Alfalfa under Different Drying Methods
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作者 Qian Shanzhu Zhang Zhe 《Animal Husbandry and Feed Science》 CAS 2018年第1期43-46,51,共5页
[Objective] The paper was to study the effects of different drying methods on moisture content and nutrient composition of alfalfa.[Method] Alfalfa collected from the same piece of land in early flowering period were ... [Objective] The paper was to study the effects of different drying methods on moisture content and nutrient composition of alfalfa.[Method] Alfalfa collected from the same piece of land in early flowering period were dried through three different drying methods, solar drying,outdoor drying in the sun and outdoor drying in the shade, and the effects of different drying methods on contents of moisture, crude protein, crude ash and neutral detergent fiber(NDF) were measured. [Result] The moisture evaporation rate of different drying methods over the same period successively were solar drying 〉 outdoor drying in the sun 〉 outdoor drying in the shade. The crude protein content of alfalfa was the highest through solar drying(P〈0.05), followed by outdoor drying in the shade, and the crude protein content through outdoor drying in the sun was the lowest. Under the condition of different moisture contents, the crude protein content of dried samples through outdoor drying in the sun decreased by 6.86%-22.43% compared to solar drying, and that through outdoor drying in the shade reduced by 4.92%-17.20%. Under the same moisture content, the crude ash content successively were outdoor drying in the shade 〉 outdoor drying in the sun 〉 solar drying; the crude ash content of alfalfa through solar drying was 3.72%-19.22% lower than outdoor drying in the sun, and 8.12%-29.93% lower than outdoor drying in the shade. The NDF content of alfalfa through outdoor drying in the sun was the highest, significantly higher than the other two drying methods( P〈0.05). The NDF content through solar drying was the lowest, 9.08%-27.25% lower than outdoor drying in the sun, and 4.84%-24.84% lower than outdoor drying in the shade. [Conclusion] The paper will provide some references for selection of appropriate alfalfa drying method. 展开更多
关键词 Solar drying Alfalfa Moisture content Crude protein Crude ash Neutral detergent fiber(NDF)
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Antibacterial activity evaluation of a novel K3-specific phage against Acinetobacter baumannii and evidence for receptor-binding domain transfer across morphologies
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作者 Xiangkuan Zheng Meihan Liu +11 位作者 Pei Li Sixiang Xu Long Chen Guoxin Xu Xiaoxiao Pang Hong Du Yishan zheng Xiang Huo Zhongming Tan Juan Li Zhirong Li Wei Zhang 《Virologica Sinica》 SCIE CAS CSCD 2024年第5期767-781,共15页
Acinetobacter baumannii(A.baumannii)poses a serious public health challenge due to its notorious antimicrobial resistance,particularly carbapenem-resistant A.baumannii(CRAB).In this study,we isolated a virulent phage,... Acinetobacter baumannii(A.baumannii)poses a serious public health challenge due to its notorious antimicrobial resistance,particularly carbapenem-resistant A.baumannii(CRAB).In this study,we isolated a virulent phage,named P1068,from medical wastewater capable of lysing CRAB,primarily targeting the K3 capsule type.Basic characterization showed that P1068 infected the A.baumannii ZWAb014 with an optimal MOI of 1,experienced a latent period of 10 min and maintained stability over a temperature range of 4–37C and pH range of 3–10.Phylogenetic and average nucleotide identity analyses indicate that P1068 can be classified as a novel species within the genus Obolenskvirus of the Caudoviricetes class as per the most recent virus classification released by the International Committee on Taxonomy of Viruses(ICTV).Additionally,according to classical morphological classification,P1068 is identified as a T4-like phage(Myoviridae).Interestingly,we found that the tail fiber protein(TFP)of P1068 shares 74%coverage and 88.99%identity with the TFP of a T7-like phage(Podoviridae),AbKT21phiIII(NC_048142.1).This finding suggests that the TFP gene of phages may undergo horizontal transfer across different genera and morphologies.In vitro antimicrobial assays showed that P1068 exhibited antimicrobial activity against A.baumannii in both biofilm and planktonic states.In mouse models of intraperitoneal infection,P1068 phage protected mice from A.baumannii infection and significantly reduced bacterial loads in various tissues such as the brain,blood,lung,spleen,and liver compared to controls.In conclusion,this study demonstrates that phage P1068 might be a potential candidate for the treatment of carbapenem-resistant and biofilmforming A.baumannii infections,and expands the understanding of horizontal transfer of phage TFP genes. 展开更多
关键词 PHAGE A.baumannii CARBAPENEM-RESISTANT Capsule type Tail fiber protein Antibacterial activity
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Novel mutation in ODF2 causes multiple morphological abnormalities of the sperm flagella in an infertile male 被引量:1
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作者 Zi-Jue Zhu Yi-Zhou Wang +6 位作者 Xiao-Bo Wang Chen-Cheng Yao Liang-Yu Zhao Zhen-Bo Zhang Yu Wu Wei Chen Zheng Li 《Asian Journal of Andrology》 SCIE CAS CSCD 2022年第5期463-472,共10页
Numerous genes have been associated with multiple morphological abnormalities of the sperm flagella(MMAF),which cause severe asthenozoospermia and lead to male infertility,while the causes of approximately 50%of MMAF ... Numerous genes have been associated with multiple morphological abnormalities of the sperm flagella(MMAF),which cause severe asthenozoospermia and lead to male infertility,while the causes of approximately 50%of MMAF cases remain unclear.To reveal the genetic causes of MMAF in an infertile patient,whole-exome sequencing was performed to screen for pathogenic genes,and electron microscope was used to reveal the sperm flagellar ultrastructure.A novel heterozygous missense mutation in the outer dense fiber protein 2(ODF2)gene was detected,which was inherited from the patient’s mother and predicted to be potentially damaging.Transmission electron microscopy revealed that the outer dense fibers were defective in the patient’s sperm tail,which was similar to that of the reported heterozygous Odf2 mutation mouse.Immunostaining of ODF2 showed severe ODF2 expression defects in the patient’s sperm.Therefore,it was concluded that the heterozygous mutation in ODF2 caused MMAF in this case.To evaluate the possibility of assisted reproductive technology(ART)treatment for this patient,intracytoplasmic sperm injection(ICSI)was performed,with the help of a hypo-osmotic swelling test and laser-assisted immotile sperm selection(LAISS)for available sperm screening,and artificial oocyte activation with ionomycin was applied to improve the fertilization rate.Four ICSI cycles were performed,and live birth was achieved in the LAISS-applied cycle,suggesting that LAISS would be valuable in ART treatment for MMAF. 展开更多
关键词 intracytoplasmic sperm injection laser-assisted immotile sperm selection multiple morphological abnormalities of the sperm flagella outer dense fiber protein 2(ODF2)
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