62 research outputs found
A Modification of the Effros-Handelman-Shen Theorem with Z2 actions
In this thesis, we show that if we have a Z2 action on a latticeordered dimension group, then it will arise as an inductive limit of Z2
actions on simplicial groups. This work was motivated by the range of
the invariant problem in Elliott and Su’s classification of AF type Z2 actions. In order to show this, we modify the proof of Effros-HandelmanShen theorem to include Z2 actions at every stage of the arguments
The Effects of Heat and Massage Application on Autonomic Nervous System
∙ The authors have no financial conflicts of interest. © Copyright: Yonsei University College of Medicine 2011 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial Licens
Pneumatization Pattern of the Frontal Recess: Relationship of the Anterior-to-Posterior Length of Frontal Isthmus and/or Frontal Recess with the Volume of Agger Nasi Cell
ObjectivesWe analyzed the pneumatization pattern of the frontal recess (FR) in a Korean population. We also determined the correlation between the volume of the agger nasi cell (ANC) and the anterior-to-posterior (A-P) length of the frontal isthmus (FI) and FR.MethodsMultiplanar paranasal sinus computed tomography (CT) images from 105 patients who underwent endoscopic sinus surgery were reviewed. The prevalence of frontal recess cells (FRCs), thickness of the frontal beak (FB), volume of the ANC, A-P length of the FI, and FR were evaluated.ResultsThe ANC was identified in 96% of the patients and frontal cells (FCs) in 32% (FC type 1, 24.2%; type 2, 4.2%; type 3, 3.1%; and type 4, 0%). The prevalences of frontal bullar, suprabullar, supraorbital ethmoidal, and interfrontal sinus septal cells were 10%, 7.8%, 3.6%, and 6.8%, respectively. The A-P lengths of the FR and FI were 10.1±3.1 and 8.4±2.9 mm, respectively. The thickness of the FB was 7.8±1.8 mm and the volume of the ANC averaged 394.1±240.5 mm3. The thickness of the FB did not correlate with the volume of the ANC. In contrast, the A-P length of the FI and FR were positively correlated with the volume of the ANC.ConclusionANCs and FCs were found in 96% and 32% of the cases in this series. FC type 4 was not seen. What appeared to be FC4 on conventional CT was identified as FBC from reconstructed parasagittal images. A large ANC increased the A-P length of the FI and FR, regardless of the thickness of the FB
In Vivo Biocompatibility Study of Electrospun Chitosan Microfiber for Tissue Engineering
In this work, we examined the biocompatibility of electrospun chitosan microfibers as a scaffold. The chitosan microfibers showed a three-dimensional pore structure by SEM. The chitosan microfibers supported attachment and viability of rat muscle-derived stem cells (rMDSCs). Subcutaneous implantation of the chitosan microfibers demonstrated that implantation of rMDSCs containing chitosan microfibers induced lower host tissue responses with decreased macrophage accumulation than did the chitosan microfibers alone, probably due to the immunosuppression of the transplanted rMDSCs. Our results collectively show that chitosan microfibers could serve as a biocompatible in vivo scaffold for rMDSCs in rats
Changes in Serum Adenosine Deaminase Activity during Normal Pregnancy
Adenosine deaminase (ADA), an enzyme essential for the differentiation of lymphoid cells, has been used for monitoring diseases with altered immunity. The purpose of this study was to investigate the changes in serum ADA activity throughout normal pregnancy. We measured the catalytic values of serum ADA from 202 normal pregnant women using a commercial kit. Subjects were divided into four groups according to the gestational age in weeks (Gwks) (Group I: 5-9 Gwks [n=58]; Group II: 15-20 Gwks [n= 63]; Group III: 24-30 Gwks [n=34]; Group IV: 30-39 Gwks [n=47]). The serum ADA levels for the Groups I, II, III, and IV were as follows: 20.1±6.9 IU/L, 20.0±7.6 IU/L, 37.9±19.9 IU/L, and 24.5±8.6 IU/L, respectively. The serum ADA activity of group III was significantly higher than the other groups (p<0.05). However, there was no significant correlation between the Gwks and the serum ADA activity. Furthermore, other parameters, such as maternal age (p=0.29), gestational age at delivery (p=0.07), delivery mode (p=0.39), and birth weight (p=0.59) had no correlation with ADA activity. Reference values of serum ADA in normal pregnancy may provide important database for making clinical decisions in pregnancies complicated by conditions where cellular immunity has been altered
Evaluation of synbiotics as gut health improvement agents against Shiga toxin-producing Escherichia coli isolated from the pig
Colibacillosis is one of the major health problems in young piglets resulting in
poor health and death caused by Escherichia coli producing F18
pili and Shiga toxin 2e. It is pivotal to reduce colibacillosis in weaned
piglets to enhance production performance. In this study, we evaluated
synbiotics as the gut health improvement agents in the mouse model challenged
with Shiga toxin-producing E. coli (STEC) isolated from
piglets. Prebiotic lactulose was formulated with each 5.0 ×
106 CFU/mL of Pediococcus acidilactici GB-U15,
Lactobacillus plantarum GB-U17, and Lactobacillus
plantarum GB 1-3 to produce 3 combinations of synbiotics. A total
of 40 three weeks old BALB/c mice were randomly assigned to 4 groups (n =
10): a control group and 3 synbiotics treated groups. Each treatment groups were
daily administrated with 5.0 × 106 CFU/mL of one synbiotics
for the first week, and every 3 days during the second week. All the mice were
challenged with 8.0 × 108 CFU/mL of STEC 5 days after animals
began to receive synbiotics. Mice treated with synbiotics based on
Pediococcus acidilactici GB-U15 and Lactobacillus
plantarum GB-U17 significantly improved daily weight gain compared
to mice in other groups. While mice treated with GB-U15 showed better fecal
index, no significant differences were observed among groups. Gross lesion and
histopathological evaluations showed that mice treated with GB-U15 moderately
improved recovery from STEC infection. In conclusion, our results suggest that
the synbiotics formulated with lactulose and Pediococcus
acidilactici GB-U15 have potential benefits to prevent and improve
colibacillosis in weaned piglets
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