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Number of results: 9
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Abstract

Based on the theory of heat transfer, the influence of expansion joints on the temperature and stress distribution of ladle lining is discussed. In view of the current expansion joint, the mathematical model of heat transfer and the three dimensional finite element model of ladle lining brick are established. By analyzing the temperature and stress distribution of ladle lining brick when the expansion joints are in different sizes, the thermal mechanical stress caused by the severe temperature difference can be reduced by the suitable expansion joint of the lining brick during the ladle baking and working process. The analysis results showed that the thermal mechanical stress which is caused by thermal expansion can be released through the 2 mm expansion joint, which is set in the building process. So we can effectively reduce the thermal mechanical stress of the ladle lining, and there is no risk of steel leakage, thus the service life of ladle can be effectively prolonged.
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Authors and Affiliations

H. Liu
W. Chang
G. Li
J. Kong
Y. Sun
G. Jiang
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Abstract

Porcine epidemic diarrhea (PED) is a disease extremely harmful to pig health. Intramuscular and Houhai acupoint injections are the main immunization routes to prevent and control PED. This study aimed to evaluate the efficacy of these two routes in pregnant sows based on serum IgG, IgA, and neutralizing antibody levels. PED virus (PEDV) immunoprophylaxis with live-attenuated and inactivated vaccines was administered. The vaccinations for the intramuscular injections elevated IgG and neutralizing antibody levels more than Houhai acupoint injections at most timepoints after immunization. However, the anti-PEDV IgA antibodies induced by vaccination with the two immunization routes did not differ significantly. In conclusion, intramuscular injections are better than Houhai acupoint injections for PEDV vaccination of pregnant sows.
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Bibliography

1. Brown J, Poonsuk K, Cheng TY, Rademacher C, Kalkwarf E, Tian L, McKeen LA, Wang C, Gimenez-Lirola L, Baum D, Karriker LA (2023) Comparison of two diagnostic assays for the detection of serum neutralizing antibody to porcine epidemic diarrhea virus. Animals (Basel) 13:757.
2. Hsueh FC, Chang YC, Kao CF, Hsu CW, Chang HW (2020) Intramuscular immunization with chemokine-adjuvanted inactive porcine epidemic diarrhea virus induces substantial protection in pigs. Vaccines (Basel) 8:102.
3. Jin H, Wu Y, Bi S, Xu Y, Shi F, Li X, Ma X, Hu S (2020) Higher immune response induced by vaccination in Houhai acupoint relates to the lymphatic drainage of the injection site. Res Vet Sci 130: 230-236.
4. Jung K, Saif LJ, Wang Q (2020) Porcine epidemic diarrhea virus (PEDV): An update on etiology, transmission, pathogenesis, and pre-vention and control. Virus Res 286: 198045.
5. Krishna VD, Kim Y, Yang M, Vannucci F, Molitor T, Torremorell M, Cheeran MC (2020) Immune responses to porcine epidemic diar-rhea virus (PEDV) in swine and protection against subsequent infection. PLoS One 15: e0231723.
6. Langel SN, Paim FC, Alhamo MA, Buckley A, Van Geelen A, Lager KM, Vlasova AN, Saif LJ (2019) Stage of gestation at porcine epidemic diarrhea virus infection of pregnant swine impacts maternal immunity and lactogenic immune protection of neonatal suckling piglets. Front Immunol 10: 727.
7. Lee C (2015) Porcine epidemic diarrhea virus: an emerging and re-emerging epizootic swine virus. Virol J 12: 193.
8. Lv C, Xiao Y, Li X, Tian K (2016) Porcine epidemic diarrhea virus: current insights. Virus Adapt Treat 8: 1-12.
9. Shibata I, Tsuda T, Mori M, Ono M, Sueyoshi M, Uruno K (2000) Isolation of porcine epidemic diarrhea virus in porcine cell cultures and experimental infection of pigs of different ages. Vet Microbiol 72: 173-182.
10. Sun D, Wang X, Wei S, Chen J, Feng L (2016) Epidemiology and vaccine of porcine epidemic diarrhea virus in China: a mini-review. J Vet Med Sci 78: 355-363.
11. Xu W, Hu S (2021) Administration of infectious bursal disease vaccine in Houhai acupoint promotes robust immune responses in chickens. Res Vet Sci 142: 149-153.
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Authors and Affiliations

C. Hu
1
X. Xie
2
D. Zhao
3
H. Liu
1
ORCID: ORCID
X. Liu
4
T. Yang
5
W. Sun
6

  1. Pulike Biological Engineering Inc., Luoyang, Henan, 471000, China
  2. Yiyang Vocational and Technical College, Yiyang, Hunan, 413055, China
  3. College of Veterinary Medicine, Hunan Agricultural University, Changsha, Hunan, 410128, China
  4. Xiangtan Center for Animal Disease Prevention and Control, Xiangtan, Hunan, 411104, China
  5. College of Life Sciences and Resource Environment, Yichun University, Yichun, Jiangxi, 336000, China
  6. Sinopharm Animal Health Corporation Ltd., Wuhan, Hubei, 430075, China
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Abstract

Self-Compacting Concrete (SCC) has been widely used in the filling layer of high-speed railways. The quality of the filling layer directly affects the durability, comfort, and safety of the track system. In this study, shrinkage characteristics and the creep behavior of SCC were investigated by compressive creep tests and shrinkage tests. They were performed on specimens with different loading levels with a calcium sulfoaluminate-based expansive agent (UEA) and viscosity modified admixture (VMA). Furthermore, based on the scanning electron microscope (SEM) morphology of hydration products and X-ray diffraction (XRD) analysis, the influence of admixtures on microstructure and mineral phases of SCC was analyzed.The results show that when concretes were loaded with the same stress level, the main factor influencing creep of SCC was the quantity and microstructure of amorphism and hydration crystal. The XRD and SEM result showed that UEA andVMAmake the creep and shrinkage of SCC reduce obviously as the cementitious system grow many crystals in hydration products. The creep of NC was less than SCC with identical compressive strength. At the same time, the addition of UEA can improve the ability to resist drying shrinkage.
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Authors and Affiliations

H. Liu
1
ORCID: ORCID
Guangchao Duan
1
ORCID: ORCID
Jingyi Zhang
2
ORCID: ORCID

  1. Shenyang Jianzhu University, School of Transportation and Geometics Engineering, No. 25 Hunnan Zhong Road, Hunnan District, 110168 Shenyang, China
  2. Shenyang Urban Construction University, School of Civil Engineering, No.380 Bai Ta Road, Hunnan District, 110167 Shenyang, China
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Abstract

A novel avian orthoreovirus (N-ARV) variant characterized with obvious arthritis and synovial inflammation, was isolated from Shandong, China in May 2016. It caused chicken poor growth and enormous economic losses to the poultry industry of China. However, there are few effective methods for detecting the antibody levels of N-ARV. In this study, a viral structural protein σC was expressed using the prokaryotic expression vector pET32a (+). The target protein was obtained by inducing for 6 hours at an IPTG concentration of 0.6mM. The optimal dilution of the coating antigen and serum antibody were determined to be 1000 fold and 10 fold respectively. A specificity test showed that there was no positive reactivity between N-ARV and other pathogens, and when the positive serum was diluted 100 times detection results were still checkable. The repeatability of this method was determined by the inter assay and intra assay tests with variability ranging from 4.85% to 7.93%. In conclusion, this indirect enzyme linked immunosorbent assay (ELISA) will be useful for large-scale serological surveys and monitoring antibody levels in N-ARV infection.
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Bibliography

Adair BM, Burns K, McKillop ER (1987) Serological studies with reoviruses in chickens, turkeys and ducks. Comp Pathol 97:495-501.
Ayalew LE, Gupta A, Fricke J, Ahmed KA, Popowich S, Lockerbie B (2017) Phenotypic, genotypic and antigenic characterization of emerging avian reoviruses isolated from clinical cases of arthritis in broilers in saskatchewan. Scientific Reports 7: 3565.
Benavente J, Martinezcostas J (2007) Avian reovirus: structure and biology. Virus Res 123:105–119. Bodelón G, Labrada L, Martønez-Costas J (2001) The avian reovirus genome segment S1 is a functionally tricistronic gene that expresses One structural and two nonstructural proteins in infected cells. Virology 290:181-191.
Caterina, KM, Frasca S, Girshick T, Khan M (2004) Development of a multiplex pcr for detection of avian adenovirus, avian reovirus, infectious bursal disease virus, and chicken anemia virus. Molecular and Cellular Probes 18: 293-298.
Curtis PE, Al-Mufarrej SI, Jones RC, Morris J, Sutton PM (1992) Tenosynovitis in young pheasants associated with reovirus, staphylococci and environmental factors. Veterinary Record 131: 293.
Dandár E, Bálint Á, Kecskeméti S (2013) Detection and characterization of a divergent avian reovirus strain from a broiler chicken with central nervous system disease. Arch Virol. 158: 2583-2588.
Dutta SK , Pomeroy BS (1967) Isolation and characterization of an enterovirus from baby chicks having an enteric infection II. Physical and chemical characteristics and ultrastructure. Avian Dis 11: 9-15.
Fahey JE , Crawley JF (1954) Studies On Chronic Respiratory Disease Of Chickens II. Isolation of A Virus. Can J Comp Med Vet Sci 18: 13-21.
Guo K, Dormitorio TV, Ou SC Giambrone JJ (2011) Development of TaqMan real-time RT-PCR for detection of avian reoviruses. Virol Methods 177: 75-79.
Heggen-Peay CL, Qureshi MA, Edens FW (2002) Isolation of a reovirus from poult enteritis and mortality syndrome and its pathogenicity in turkey poults. Avian Dis 100: 102-105
Howell SH, Walker LL ( 1972) Synthesis of DNA in toluenetreated Chlamydomonas reinhardi (DNA replication-chloroplast DNA-cell cycle-electron microscopy). Proceedings of the National Academy of Sciences of the United States of America 69: 490-494.
Ide PR, Dewitt W (1979) Serological incidence of avian reovirus infection in broiler-breeders and progeny in Nova Scotia. Canadian Veterinary Journal La Revue Vétérinaire Canadienne 20: 348.
Jones RC, Kibenge F (1984) Reovirus-induced tenosynovitis in chickens: The effect of breed. Avian Pathol 13: 511-528.
Jones RC, Savage CE (1987) Effects of experimental immunosuppression on reovirus-induced tenosynovitis in light- -hybrid chickens. Avian Pathol 14: 51-58.
Lin FQ, Qi-Lin HU, Chen SY (2007) Diagnosis of Muscovy Duck Reovirus Disease by Semi-Nested RT-PCR. Journal of South China Agricultural University 16: 61-68.
Liu HJ, Giambrone JJ, Nielsen BL (1997) Molecular characterization of avian reoviruses using nested PCR and nucleotide sequence analysis. J Virol Methods 65: 159-167.
Liu Y, Wan W, Gao D ( 2016) Genetic characterization of novel fowl aviadenovirus 4 isolates from outbreaks of hepatitis-hydropericardium syndrome in broiler chickens in China. Emerg Microbes Infect 5: 117.
Marks M , Marks JL (2016) Viral arthritis. Clinical Medicine 1: 16-19. Mor SK, Sharafeldin TA, Porter RE (2014) Molecular characterization of L class genome segments of a newly isolated turkey arthritis reovirus. Infect Genet Evol 27: 193-201.
Mor SK, Sharafeldin TA, Porter RE (2013) Isolation and characterization of a turkey arthritis reovirus. Avian Dis 57: 97-103.
Noh JY, Lee DH, Lim TH, Lee J H, Day JM, Song CS (2018) Isolation and genomic characterization of a novel avian orthoreovirus strain in Korea, Arch Virol 163: 1-10.
Victor PT, Darko M, Tom I, Frank V, Faizal A (2018) Molecular characterization of emerging avian reovirus variants isolated from viral arthritis cases in western canada 2012-2017 based on partial sigma (σ)c gene. Virology 522: 138-146.
Palya V, Glávits R, Dobos-Kovács M, É Ivanics, Nagy, E, K Bányai (2003) Reovirus identified as cause of disease in young geese. Avian Pathol 32: 129-138.
Xie L, Xie Z, Wang S, Deng X, Xie Z (2020) Study of the activation of the pi3k/akt pathway by the motif of σa and σns proteins of avian reovirus. Innate Immunity 26: 4.
Rendón-Anaya M, Montero-Vargas JM, Saburido-Álvarez S, Vlasova A, Herrera-Estrella A (2017) Genomic history of the origin and domestication of common bean unveils its closest sister species. Genome Biology 18: 60.
Sharafeldin TA, Mor SK, Bekele AZ, Verma H, Noll SL, Goyal SM (2015) Experimentally induced lameness in turkeys inoculated with a newly emergent turkey reovirus. Veterinary Research 46: 11.
Shien JH, Yin HS , Lee LH (2000) An enzyme-linked immunosorbent assay for the detection of antibody to avian reovirus by using protein σ B as the coating antigen. Res Vet Sci. 65: 60
Wen L, Hwh B, Ming H, Long H, Hjlb C (2004) Avian reovirus σc protein induces apoptosis in cultured cells. Virology 321: 65-74.
Tang Y, Lu H (2015) Genomic characterization of a broiler reovirus field strain detected in pennsylvania. Infection, genetics and evolution: journal of molecular epidemiology and evolutionary genetics in infectious diseases 31: 177-182.
Tang Y, Lin L, Sebastian A, Lu H (2016) Detection and characterization of two co-infection variant strains of avian orthoreovirus (ARV) in young layer chickens using next-generation sequencing (NGS). Sci Rep 6: 24519.
Vasserman Y, Eliahoo D, Hemsani E (2004) The influence of reovirus sigma C protein diversity on vaccination efficiency. Avian Dis 47: 28-30
Vindevogel H, Meulemans G, Pastoret PP (1982) Reovirus infection in the pigeon. Ann Rech Vet Rinaires Ann Vet Res 13: 149.
Yun T, Chen H, Yu B (2015) Development and application of an indirect ELISA for the detection of antibodies to novel duck reovirus. Journal of Virological Methods 220: 55-59.
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Authors and Affiliations

H. Liu
1 2 3
ORCID: ORCID
Z. Wei
1 2 3
J. Yang
1 2 3
Y. Wang
1 2 3
ORCID: ORCID
J. Hu
1 2 3
Y. Tang
1 2 3
Y. Diao
1 2 3

  1. College of Veterinary Medicine, Shandong Agricultural University, No.61 Daizong Street, Tai’an 271018, China
  2. Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, No.61 Daizong Street, Tai’an 271018, China
  3. Shandong Provincial Engineering Technology Research Center of Animal Disease Control and Prevention, Shandong Agricultural University, No.61 Daizong Street, Tai’an 271018, China
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Abstract

In this study, we developed a SYBR Green I real-time PCR method for the rapid and sensitive detection of novel porcine parvovirus 7 (PPV7). Specific primers were designed based on the highly conserved region within the Capsid gene of PPV7. The established method was 1,000 times more sensitive than the conventional PCR method and had a detection limit of 35.6 copies. This method was specific and had no cross-reactions with PCV2, PCV3, PRV, PEDV, PPV1, and PPV6. Experiments testing the intra and interassay precision demonstrated a high reproducibility. Testing the newly established method with 200 clinical samples revealed a detection rate up to 17.5% higher than that of the conventional PCR assay. The established method could provide technical support for clinical diagnosis and epidemiological investigation of PPV7.
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Authors and Affiliations

Y.D. Li
1
Z.D. Yu
2
C.X. Bai
2
D. Zhang
2
P. Sun
2
M.L Peng
2
H. Liu
3
ORCID: ORCID
J. Wang
4
Y. Wang
2
ORCID: ORCID

  1. Municipal Key Laboratory of Virology, Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, PR China
  2. Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, PR China
  3. Anhui Animal Diseases Prevention and Control Center and Key Laboratory of Veterinary Pathobiology and Disease Prevention and Control of Anhui Province, Hefei 230091, PR China
  4. Animal Husbandry Base Teaching and Research Section, College of Animal Science and Technology, Hebei North University, Hebei 075000, PR China
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Abstract

The Intrauterine fetal development process is complicated and affected by many regulating factors such as maternal nutritional status, transcription factors and adipokines. Adipokines are kinds of active substances secreted by adipose tissue, including more than 50 kinds of molecules. To explore the correlation between calf birth weights and adipokines including adiponectin, leptin, visfatin, and IGF-1 in cows venous and venous cord blood. Fifty-four healthy multiparous Chinese Holstein cows were used; in which, cows with a calf weight less than 40 kg were included in group A (n=9); those with a calf weight between 40 kg~45 kg were included in group B (n=25) and ≥45 kg were included in group C (n=20), venous blood and cord venous blood was collected. An ELISA kit was used to evaluate the concentration of adiponectin, leptin, visfatin, and IGF-1, correlations between index-index and index-calf birth weight were analysed. In both cows venous and cord venous blood, adiponectin, leptin, visfatin, and IGF-1 levels were significantly correlated with each other (p<0.01), and levels of these adipokines in venous blood were significantly higher than cord venous blood (p<0.01). Adiponectin, leptin, visfatin, and IGF-1 in venous cord blood were positively correlated with calf birth weights, and significantly correlated with calf birth weights respectively (p<0.01). Our study showed that adiponectin, leptin, and IGF-1 were found in venous blood and cord venous blood, and adiponectin, leptin, and IGF-1 in venous and cord venous blood potentially inter-regulated each other; adiponectin, leptin, and IGF-1 in venous blood were not significantly correlated with calf birth weights, while adiponectin, leptin, visfatin, and IGF-1 in venous cord blood were significantly correlated with calf birth weights, respectively.

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Authors and Affiliations

L. Shen
Y. Zhu
J. Xiao
J. Deng
G. Peng
Z. Zuo
S. Yu
X. Ma
Z. Zhong
Z. Ren
Z. Zhou
H. Liu
ORCID: ORCID
X. Zong
S. Cao
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Abstract

We investigated changes in concentrations of ADP (adiponectin), LEP (leptin), BHBA (beta-hydroxybutyric acid), NEFA (non-esterified fatty acid), Glucose (Glu) and INS (insulin) in serum of healthy perinatal dairy cows and cows with ketosis. Twenty-one healthy cows and seventeen cows with ketosis from a herd of a total 60 Holstein cows (near dry period i.e. 56 days antepartum) were selected. Blood was collected through the tail vein every 7 days, from 56 day antepartum to 56 day postpartum. Serum ADP, LEP, BHBA, NEFA, Glu, and INS concentrations were determined, and ketosis was diagnosed through serum BHBA (≥1.2 mmol/L). We showed the concentration of serum adipokines and energy balancing indices were stable during antepar- tum period. However, ADP concentration increased while LEP decreased, and there were a significant increase in cows with ketosis compared to that of in healthy cows. Serum BHBA and NEFA concentrations increased significantly at first, and then gradually decreased in both healthy cows and cows with ketosis. However, cows with ketosis showed higher concentrations of BHBA and NEFA which restored later. The serum concentration of Glu in both healthy dairy cows and cows with ketosis showed a decreasing trend. INS concentration in healthy cows was decreased while it was increased in cows with ketosis. The results reflect the extent of hypo- glycemia and lipid mobilization postpartum, suggest IR exists in cows with ketosis while serum ADP and LEP might play roles in the development of ketosis.

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Authors and Affiliations

L. Shen
B. Qian
J. Xiao
Y. Zhu
S. Hussain
J. Deng
G. Peng
Z. Zuo
L. Zou
S. Yu
X. Ma
Z. Zhong
Z. Ren
Y. Wang
ORCID: ORCID
H. Liu
ORCID: ORCID
Z. Zhou
D. Cai
Y. Hu
X. Zong
S. Cao

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