A series of acrylic copolymers containing perfluoroalkyl acrylate were synthesized by 2-step emulsion polymerization of variety of acrylate monomers (ethyl acrylate, butyl acrylate or methyl methacrylate) with perfluoroalkyl ethyl acrylate (PFA) and glycidyl methacrylate (GMA) monomers. This study focused on effects of monomer compositions (the kind of acrylate monomer, contents of PFA and GMA) and composition of surfactants [(sodium dodecyl sulphate/nonylphenol 10mole ethoxylate (NP-10)] and initiator content on the contact angles and surface free energy. It was found that the copolymer having an optimum composition (BA : 87 wt%, GMA : 8.7 wt% and PFA : 4.3 wt%) was shown to be quite surface active [surface free energy : 19.89 mN/m and contact angles : $103.5^{\circ}$ (water) and $78.7^{\circ}$ (methylene iodide)] in the solid state. This result suggests that the optimal copolymer containing fluorinated monomer synthesized in this study have high potential as a low surface energy material, which may have high oil- and water-repellent surface and have been proposed as acrylic syntan for leather and also as soil-resistant/oil and water repellent coating for textiles and wood etc.
Kim, Hyoung-Soon;Bae, Young-Chun;Lee, Sang-Min;Kim, Kyung-Yo;Won, Kyoung-Sook;Sihm, Gyue-Hearn;Park, Su-Jeong
Journal of Sasang Constitutional Medicine
/
v.15
no.1
/
pp.72-89
/
2003
To elucidate the neuroprotective effect of Yeoldahanso-tang(YHT) on nerve cells damaged by hypoxia, the cytotoxic effects of exposure to hypoxia were determined by XTT(SODIUM3,3'-{I-[(PHENYLAMINO) CARBONYL]-3,4-TETRAZOLIUM}- BIS (4-METHOXY-6-NITRO) BENZENE SULFONIC ACID HYDRATE), NR(Neutral red), MTT(3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) and SRB(Sulforhodamin B) asssay. The activity of catalase and SOD(Superoxide dismutase) was measured by spectrophometry, and $TNF-{\alpha}$(Tumor cell necrosis $fector-{\alpha}$) and PKC(Protein kinase C) activity was measured after exposure to hypoxia and treatment of YHTWE. Also the neuroprotective effect of YHTWE was researched for the elucidatioion of neuroprotective mechanism. The results were as follows; 1. Hypoxia decreased cell viability measured by XTT, NR assay when cultured cerebral neurons were exposed to 95% N2/5% CO2 for $2{\sim}26$ minutes in these cultures and YHTWE inhibited the decrease of cell viability. 2. H2O2 treatment decreased cell viability measured by MTT, and SRB assay when cultured cerebral neurons were exposed to 1-80 ${\mu}M$ for 6 hours, but YHTWE inhibited the decrease of cell viability. 3. Hypoxia decreased catalase and SOD activity, and also $TNF-{\alpha}$ and PKC activity in these cultured cerebral neurons, but YHTWE inhibited the decrease of the catalase and SOD activity in these cultures. 4. Hypoxia triggered the apoptosis via caspase activation and internucleosomal DNA fragmentation. Also hypoxia stimulate the release of cytochrome c forom mitochondria. YHTWE inhibited the apoptosis via caspase activation induced by hypoxia. From these results, it can be suggested that brain ischemia model induced hypoxia showed neurotoxicity on cultured mouse cerebral neurons, and the YHTWE has the neuroprotective effect in blocking the neurotoxicity induced by hypoxia in cultured mouse cerebral neurons.
To study the follicular atretic mechanism in mammalian ovary, the medium-sized (3.0-6.0mm) follicles of porcine ovary were morphologically classified as nonnal and atretic. Steroid concentrations in the follicular fluid were analyzed by radioimmunoassay, and the proteins in that fluid were electrophoretically separated. Concentrations of progesterone in the atretic follicular fluid of follicular phases were higher than those of normal ones (p < 0.05). Concentrations of testosterone were high in normal luteal and atretic follicular-phases follicles. The concentrations of estradiol remained significanily lower in atretic follicular-phases follicles than normal. After sodium dodecyl sulfate-polyacrylamide gel electrophoresis of follicular fluid proteins, four kinds of proteins (20K, 32K, 33K, 38K) were detected, and those proteins were not present in sera. According to the ovarian cycle, proteins of MW of 112K and 141K were identified. In atretic follicular fludies, MW of 23K and 24K were specifically detected. From the above results, we can conclude that, as ovarian cycle changes, steroid contents and protein composition in atretic follicular fluid are different from the normal developing follicular fluid. To further understand the physiologic roles of the proteins present in the atretic follicular fluids, these proteins need to be characterized and identified.
We have synthesized uniform nanometer sized magnetite particles using chemical coprecipitation technique through a sonochemical method with surfactant such as oleic acid. Magnetite phase nanoparticles could be observed from X-ray diffraction. Magnetite nanoparticles is surface phase morphology and biopolymer-microspheres for Application Medical. Magnetite nanoparticles coated biopolymer. Atomic Force Microscope (AFM) was used to image the coated nanoparticles. Magnetic colloid suspensions containing particles with sodium oleate, chitosan and $\beta$-glucan have been prepared. The morphology of the magnetic biopolymer microsphere particles were characterized using optical microscope. Magnetic hysteresis measurement were performed using a superconducting quantum interference device (SQUID) magnetometer at room temperature to investigate the magnetic properties of the biopolymer microspheres and magnetite coated biopolymer including magnetite nanoparticles. Magnetic Resonance (MR) imaging was used to investigate biopolymer coated nanoparticles and biopolymer microspheres.
This study was performed to investigate the changes of the serological lipid-related parameters of the rats when they were fed with the high fat diets supplemented with or without rutin for five weeks. Twenty-four Sprague-Dawley male rats ($272.2{\pm}7.2 g$ of body weight) were randomly divided into three groups: control (C) group and two treatment groups. Rats in the C group were fed with the high-fat diet containing 20% lard, 1% cholesterol and 0.5% sodium cholate (w/w) which was modified from the formula of the American Institute of Nutrition-76 (AIN-76) diet. Rats in treatment groups were fed with above diet supplemented with 0.75% rutin (R-0.75) or 1.5% rutin (R-1.5) on the weight to weight basis, respectively. The supplementation of rutin did not induce any significant difference on the final body weight, gain of body weight, the amount of feed intake and the feed efficiency of rats in both control and treatment groups. In addition the values of glucose concentration, total protein, albumin, globulin and albumin/globulin (A/G) ratio showed no significant differences among groups. The values of total cholesterol (TC) and low density lipoprotein-cholesterol (LDL-C) in sera of rats in both R-0.75 and R-1.5 groups were lower than those in C group but the significances were showed in only between R-0.75 and C group (p < 0.05 and p < 0.01, respectively). The values of high density lipoprotein-cholesterol (HDL-C) in sera of rats in both R-0.75 and R-1.5 groups were higher than those in C group but the significances were showed in only between R-1.5 and C group (p < 0.01). The values of atherogenic index(AI) of rats in both R-0.75 and R-1.5 groups were the lower than those in C group (p < 0.01 and p < 0.05, respectively). The values of triglyceride in sera of rats showed no significant differences among groups. The values of AST and ALT in sera of rats showed no significant differences among groups. Therefore the supplementation of rutin to high fat diet in rats reduced effectively the serum lipid levels such as TC and LDL-C which were regarded as to cause the cardiovascular diseases, and moreover it elevated effectively HDL-C value which was regarded to protect cardiovascular diseases.
This study was performed to investigate the changes of the serological lipid-related parameters of the rats when they were fed with the high fat diets supplemented with or without naringin for five weeks. Twenty-four Sprague-Dawley male rats($272.2{\pm}7.2$ g of body weight) were randomly divided into three groups(eight rats per each group) : control(C) group and two treatment groups. Rats in the C group were fed with the high-fat diet containing 15% lard, 1% cholesterol and 0.5% sodium cholate(w/w) which was modified from the formula of the American Institute of Nutrition-76(AIN-76) diet. Rats in treatment groups were fed with above diet supplemented with 0.1% naringin(N-0.1) or 0.2% naringin(N-0.2) on the weight to weight basis, respectively. The supplementation of naringin did not induce any significant difference on the final body weight, gain of body weight, the amount of feed intake and the feed efficiency of rats in between control and treatment groups. In addition the levels of glucose, total protein, albumin, globulin and albumin/globulin(A/G) ratio in sera of rats showed no significant differences between control and treatment groups. The levels of total cholesterol(TC) and low density lipoprotein-cholesterol(LDL-C)in sera of rats in both N-0.1 and N-0.2 groups were significantly lower than in C group(p<0.05). The levels of high density lipoprotein-cholesterol(HDL-C) were significantly higher in both N-0.1 and N-0.2 groups than in C group(p<0.05). The values of atherogenic index(AI) were significantly lower in both N-0.1 and N-0.2 groups than in C group(p<0.05). The levels of triglyceride in sera of rats showed no significant differences between control and treatment groups. The values of AST and ALT were significantly lower in both N-0.1 and N-0.2 groups than in C group(p<0.05). Therefore the supplementation of naringin to high fat diet in rats reduced effectively the serum lipid levels such as TC and LDL-C and AI which were regarded as to cause the cardiovascular diseases, and moreover it elevated the HDL-C value effectively which was regarded to protect cardiovascular diseases.
Kim, Myoung Hwan;Kang, Seong Soo;Kim, Gonhyung;Choi, Seok Hwa
Journal of Veterinary Clinics
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v.30
no.3
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pp.159-165
/
2013
The present study was conducted to evaluate the efficacy of Cinnamomum cassia Blume (CC) extract on the repair of damaged cartilage in a rat model of osteoarthritis (OA) by anterior cruciate ligament transection (ACLT) and medial meniscus resection (MMx). Forty-eight rats were assigned to six groups (n = 8 per group): sham as negative control (NC), positive control (PC), diclofenac sodium (DS, 2 mg/kg), CC 25 mg/kg, CC 50 mg/kg and CC 100 mg/kg groups. Treatments were 12 weeks from 7 days after ACLT + MMx. Loss of cartilage and joint instability were significantly reduced in response to treatment with CC or DS compared to the PC (p < 0.05). CC significantly ameliorated cartilage degradation in a dose-dependent manner as assessed by histological findings (p < 0.01). A reduction in the severity of structural changes and a dose-dependent increase in Safranin-O staining intensity were observed in CC treatments, indicating that cartilage degradation was inhibited. Although DS did not affect the increase in active caspase-3 and cleaved poly(ADP-ribose) polymerase-induced apoptosis during the progression of OA, cells reactive to these apoptotic markers were decreased significantly by CC (p < 0.05). However, treatments with CC or DS did not influence the uptake of 5-bromo-2'-deoxyuridine. The findings suggest that CC can exert a chondroprotective action on OA through anti-inflammatory and anti-apoptotic properties.
Korean goral (Neamorhedus caudatus) is registered as a natural monument number 217 by South Korea Cultural Heritage Administration. It is also recognized as the endangered species I by Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). In this study, blood samples of Korean goral were collected to make reference intervals. Blood sampling was conducted on 19 numbers of Korean gorals (ten females, nine males), which were reared in Korean Goral Restoration Center. For total samples, the reference intervals of hematological parameters were: white blood cell $7.69{\sim}10.87K/{\mu}{\Lambda}$; hematocrit 36.73~46.18%; red blood cell $10.72{\sim}12.86K/{\mu}{\Lambda}$; hemoglobin 12.79~15.14 g/dL; mean corpuscular volume 33.15~36.75 fL; mean corpuscular hemoglobin 11.53~12.23 pg; mean corpuscular hemoglobin concentration 32.64-35.91 g/dL and red blood cell distribution width 39.2~43.46%. For total samples of each parameters, the following results were obtained for serum biochemistry: glucose 111.81~153.77 mg/dL; blood urea nitrogen 22.35~28.91 mg/dL; creatine 1.22~1.84 mg/dL; phosphate 4.57~6 mg/dL; calcium 8.7~9.1 mg/dL; total protein 6.53~6.92 g/dL; albumin 3.1~3.48 g/dL; globulin 3.26~3.62 g/dL; alanine aminotransferase 56.7~158.56 U/L; aspartate aminotransferase 230.35~473.06 U/L; alkaline phosphatase 178.06~332.47 U/L; gamma-glutamyl transpeptidase 131.6-~181.24 U/L; total bilirubin 1.47~2.12 mg/dL; cholesterol 46.48~71.52 mg/dL; amylase 16.3~26.03 U/L; sodium 150.43~153.88 mmol/L; potassium 3.98~4.6 mmol/L and chlorine 109.48~113.26 mmol/L. The ranges of values were similar campared to previous studies except in the case of RDW value, which showed higher range than the RDW value of a previous study. The reference intervals from this study will be useful data for treatment and management of gorals.
This study was performed to evaluate anesthetic and cardiovascular effects of xylazine/fentanyl/azaperone and medetomidine/midazolam as preanesthetics and their combinations with antagonists in halothane-anesthetized dogs. Eight clinically healthy dogs($4.54{\pm}2.16kg$) were used at the interval of more than 14 days between experiments in turn for propionyl promazine(PP 0.3mg/kg, IM), xylazine/fentanyl/azaperone(XFA 2mg/kg, 0.0137mg/kg, 0.11mg/kg, IM), medetomidine/midazolam(MM 0.02mg/kg, 0.3mg/kg, IM), combination of XFA and their antagonists (yohimbine 0.05mg/kg, naloxon 0.0005mg/kg, IV) and combination of MM and their antagonist(atipamezole 0.08mg/kg IM). The sedation induction times in XFA($2.56{\pm}1.01min$) and MM($5.44{\pm}2.07min$) groups were significantly better than that of PP group($10.75{\pm}2.38min$)(p < 0.05). The thiopental sodium dose required for tracheal intubation in XFA($2.38{\pm}3.38mg/kg$) and MM($3.91{\pm}3.47mg/kg$) groups were significantly less than that of PP group($12.57{\pm}2.13mg/kg$)(p < 0.05). All time indices expressing the recovery(pedal reflex recurrence time, extubation time, arousal time, standing time and walking time) were significantly shorter in the combination groups of XFA or MM with their antagonists than in PP, XFA and MM groups(p < 0.05). The suppressions of cardiovascular function of XFA and MM were more than that of PP. Heart rate and cardiac output were recovered by the antagonists of XFA and MM, but mean arterial pressure were not recovered by the antagonists. PP induced apnea in 4 out of 8 dogs, but XFA in none and MM in one. The present study suggested that for rapid sedation, prevention of apnea after intubation and rapid recovery after halothane cessation, combinations of xylazine/fentanyl/azaperone or medetomidine/midazolam with their antagonists are recommendable as preanesthetic method in gas anesthetised dogs with normal cardiovascular function.
The goal of this study is to provide basic data to establish a foundation for the provision of safe drinkable water. The raw water of natural mineral water was analyzed to determine the quantities of anions (F-, Cl-, NO3-N-, and SO42- ) and cations (Ca2+, K+, Mg2+, and Na+) during the former and latter half of 2016. Analysis of the current quality of the raw water of natural mineral water among domestic manufacturers showed average anions contents of 0.46mg/L of fluorine, 8mg/L of chlorine ion, 1.5mg/L of nitrate nitrogen, and 12mg/L of sulfate ion. While the fluorine content was greater than the water quality criterion of 2.0mg/L at four points, the fluorine level was overall stable. The average cations contents included 21.3mg/L of calcium, 1.0mg/L of potassium, 3.4mg/L of magnesium, and 9.6mg/L of sodium. The chemical characteristics were compared among the major ions, and the results are presented in a piper diagram. The content ratio of cations was in the order of Ca2+> Na+>Mg2+>K+, whereas that of anions was in the order of SO42->Cl->NO3-N->F-. While the cations were slightly scattered, the anions were generally concentrated except for at a few points. The Ca-Na-HCO3 type was dominant overall in water sources from diorite, gneiss, and granite, while the Na-Mg-Ca-HCO3-Cl type was dominant in basalt sources. Mineral water manufacturers source their water under various conditions, including in-hole casing, excavation depth, and contact state of bedrock; even within the same rocky area, some differences in the water quality type can occur. When the depth of the water source was taken into account, the mean anions contents of F-, Cl-, NO3-N-, and SO42- were similar, with no significant differences according to depth. Of the cations, K+ and Na+ showed no significant differences across all the tubular wells, whereas Ca2+ and Mg2+ decreased in content with depth.
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