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Treatment of Oily Wastewater with WPO and CWO
Han, Mei,Chen, Yihui,He, Fang,Yu, Li Korean Chemical Society 2014 대한화학회지 Vol.58 No.1
Petroleum refining unavoidably generates large volumes of oily wastewater. The environmentally acceptable disposal of oily wastewater is a current challenge to the petroleum industry. Nowadays, more attentions have been focused on the treatment techniques of oily wastewater. Oily wastewater contained highly concentrated and toxic organic compounds. Wet peroxide oxidation (WPO) and catalytic wet oxidation (CWO) were applied to eliminate pollutants to examine the feasibility of the WPO/CWO of oily wastewater. The results indicated that more than 80% chemical oxygen demand (COD) removal from oily wastewater was achieved with CWO. Homogenous catalyst, $NaHCO_3$ and $Na_2CO_3$ and NaOH showed effective removal for pollutants in oily wastewater. Greater than 90% COD removal was achieved with WPO. It was concluded that WPO was a far more effective process for oily wastewater.
Han Zeng,Wen Shan Huo,Fang Wang,Ting Mei Ma 한국고분자학회 2019 Macromolecular Research Vol.27 No.10
Influence of interactions between Laccase and carbon nano-tubes modified by perylene derivative on structural parameters and electrochemical behaviors of immobilized redox protein, was investigated systematically by the means of spectrometry, photography and electro-chemistry. Sophisticated interactions including abutting coordination could result in anomalistic agglomeration of nano-composite with Lac incorporation which displayed better hydrophobicity than free Laccase and high resistance of charge shuttle. It would retard the progress of thermal decomposition of nano-composite and would lead to the formation of composite without emission of fluorescence. Strong binding of Laccase with perylenyl derivative (binding constant: 7.5×104 L/mol) would alter the mechanism of electron transferring. T1 Cu2+ of Laccase in the status of complexation played the intra-molecular electron relay with mid-wave potential at -135.6 mV and demonstrated undesirable dynamics in electron transferring (7.7×10-2 s-1). The catalytic function in oxygen reduction was prohibited for the abutting coordination and only weak catalytic effect could be achieved in the presence of electron relay. The whole catalytic cycle was limited by the mass transferring of electron mediator.
EFFECT OF IMPLANT DESIGNS ON INSERTION TORQUE AND IMPLANT STABILITY QUOTIENT (ISQ) VALUE
Piao Chun-Mei,Heo Seong-Joo,Koak Jai-Young,Kim Seong-Kyun,Han Chong-Hyun,Fang Xian-Hao The Korean Academy of Prosthodonitics 2006 대한치과보철학회지 Vol.44 No.3
Statement of problem. Primary implant stability has long been identified as a prerequisite to achieve osseointegration. So the application of a simple, clinically applicable noninvasive test to assess implant stability and osseiointegratation are considered highly desirable. Purpose. The purpose of this study was to evaluate the ISQ value and the insertion torque of the 3 different implant system, then to evaluate whether there was a correlation between ISQ value and insertion torque; and to determine whether implant design has an influence on either insertion torque or ISQ value. Material and method. The experiment was composed of 3 groups: depending on the implant fixture design. Group1 was Branemark type parallel implant in $3.75{\times}7mm$. Group2 was Oneplant type straight implant in $4.3{\times}8.5mm$. Group3 was Oneplant type tapered implant in $4.3{\times}8.5mm$. Depending on the density of the bone, 2 types of bone were used in this experiment. Type I bone represented for cortical bone, type II bone represented for cancellous bone. With the insertion of the implant in type I and type II bone, the insertion torque was measured, then the ISQ value was evaluated, and then the correlation between insertion torque and ISQ value was analyzed Result and conclusion. Within the limitations of this study, the following conclusions were drawn. 1. Within the 3 different implants, the insertion torque value and ISQ value were higher in type I bone, when compared with type II bone.(p<0.05) 2. In type I and type II bone, Oneplant type tapered implant has the highest value in insertion torque.(p<0.05) 3. In type I and type II bone, there was no difference in ISQ values among the 3 types of implant. (p>0.05) 4. Significant linear correlation was found in $Br{\aa}nemark$ type parallel implant: $3.75{\times}7mm$ in type II bone.
Antioxidant effect of peony seed oil on aging mice
Xiao-Miao Han,Su-Xi Wu,Mei-Fang Wu,Xue-Feng Yang 한국식품과학회 2017 Food Science and Biotechnology Vol.26 No.6
D-galactose was injected into mice of ages 4–5 months, and peony seed oil was administered using an oral gavage to assess its possible anti-aging functions. The content of malondialdehyde (MDA) and the activities of monoamine oxidase (MAO), glutathione peroxidase (GSHPx), and superoxide dismutase (SOD) in the brain and liver of these mice were determined using biochemical kits. The significance of the differences in the content of the components associated with aging and anti-aging among each group was analyzed statistically. The MDA content and activities of MAO in the brain and liver of mice in the peony seed oil group were significantly lower than those in the aging group. The activities of GSH-Px, Cu/Zn-SOD, and Mn-SOD in the brain and liver of mice in the peony seed oil group were very significantly higher than those in the aging group. Peony seed oil was determined to have an obvious anti-aging function.
Sun Hu-Nan,Fang Wan,Jin Mei-Hua,Han Ying-Hao,Kim Sun-Uk,Lee Sang-Han,Kim Nam-Soon,Kim Cheol-Hee,Lee Dong-Seok The Korean Society for Biomedical Laboratory Scien 2004 Journal of biomedical laboratory sciences Vol.10 No.4
Inflammatory factor such as Interleukin-1 play important roles in determining the fate of both acute and chronic neurological disorders. We investigated whether inhibitors of PKC or PTK can serve as pharmacological agents to reduce IL-I production and the mechanisms underlying their pharmacological effects in a mixed population of glia. Inhibitors of PKC such as H7, Go6976 and Ro31-8220 significantly reduced both the mRNA and protein levels of IL-1α and IL-β in lipopolysaccharide-activated primary glial cells. While the PTK inhibitor genistein also significantly reduced the production of these cytokines, it did not affect the expression of their mRNA. Taken together, inhibitors of PKC and PTK could serve as pharmacological agents to reduce IL-1 production. However, the mechanisms underlying their pharmacological effects are different. Our results provide evidence that inhibitors of protein kinases can serve as pharmacological agents to modulate IL-1 production in glial cell, and in turn, alleviate neuronal injury.
Dong-Yan Gao,Li-Mei Han,Li-Hong Zhang,Xiao-Ling Fang,Jian-Xin Wang 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.5
Salvianolic acid B (SalB) is an active component isolated from Chinese herbal medicine Salvia miltiorrhiza. The aim of this study was to investigate the extent of absolute oral bioavailability (F) of SalB in beagle dogs and the effect on blood viscosity after intravenous and oral administration of Salvianolic acids (SAs). A gradient elution HPLC method was developed and validated to determine the concentration of SalB and its three possible metabolites in plasma. After SAs (180 mg/kg, p.o.; 9 mg/kg, i.v.) were given, the AUCs of SalB were 1680 ± 670 and 7840 ± 1140 ng/mL·h, respectively. The F of SalB in dogs was calculated to be only 1.07 ± 0.43%. The blood viscosity was remarkably decreased after a single intravenous injection of SAs (9 mg/kg). However, no significant change of blood viscosity was observed after a single oral administration of SAs (180 mg/kg). The results suggested that the F of SalB was extremely low and single oral administrated SAs had no effect on ameliorating blood viscosity in beagle dogs.
Hu-Nan Sun,Wan Fang,Mei-Hua Jin,Ying-Hao Han,Sun-Uk Kim,Sang-Han Lee,Nam-Soon Kim,Cheol-Hee Kim,Dong-Seok Lee 대한의생명과학회 2004 Biomedical Science Letters Vol.10 No.4
Inflammatory factor such as Interleukin-1 play important roles in determining the fate of both acute and chronic neurological disorders. We investigated whether inhibitors of PKC or PTK can serve as pharmacological agents to reduce IL-1 production and the mechanisms underlying their pharmacological effects in a mixed population of glia. Inhibitors of PKC such as H7, G?6976 and Ro31-8220 significantly reduced both the mRNA and protein levels of IL-1α and IL-β in lipopolysaccharide-activated primary glial cells. While the PTK inhibitor genistein also significantly reduced the production of these cytokines, it did not affect the expression of their mRNA. Taken together, inhibitors of PKC and PTK could serve as pharmacological agents to reduce IL-1 production. However, the mechanisms underlying their pharmacological effects are different. Our results provide evidence that inhibitors of protein kinases can serve as pharmacological agents to modulate IL-1 production in glial cell, and in tum, alleviate neuronal injury.