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흰쥐에서 스트레스로 유발된 위염에 대한 까마귀쪽나무열매 추출물의 보호 효과
박인재,조주현,박성환,윤지현,최구희,김현정,서윤희 한국식품위생안전성학회 2017 한국식품위생안전성학회지 Vol.32 No.6
The object of this study was to investigate the inhibitory effects of Litsea japonica fruit flesh extract (LJF-HE) on gastritis of an stress-induced SD rat model. Rats were randomly divided into six groups: Normal (normal group), Control (stress-induced gastritis), Ranitidine (stress-induced gastritis and ranitidine 50 mg/kg), LJFHE- L (stress-induced gastritis pretreated with L. japonica fruit flesh extract at 30 mg/kg), LJF-HE-M (stress-induced gastritis pretreated with L. japonica fruit flesh extract at 60 mg/kg), LJF-HE-H (stress-induced gastritis pretreated with L. japonica fruit flesh extract at 120 mg/kg). In groups treated with LJF-HE, gastric mucosal damage and pepsin activity were reduced. Additionally, there were decreases in the expression of cholecystokinin 2 receptor (CCK-2r) in the gastric lesions. The plasma levels of IL-1β slightly but significantly decreased in LJF-HE treated groups compared to control. The plasma level of PGE2 was also significantly increased in LJF-HE treated groups. These results suggest that LJF-HE has the ability to reduce of the severity stress-induced gastritis.
정진폭특성을 갖는 Birothogonal 부호로 부호화된 Q$^{2}$AM(Quadrature Quadrature Amplitude Modulation)에 관한 연구
박인재,심수보 한국통신학회 1996 韓國通信學會論文誌 Vol.21 No.9
The energy efficiency and bandwidth efficiency are two important criterion in designing a modulation scheme Especially the constant envelope property must be considered as in the non-linear channel tht exit, for example in the nonlinear amplifiers for satellite repeater. The Q$^{2}$AM(Quadrature Quadrature Amplitude Modulation) is a new modulation scheme which combines the Q$^{2}$PSK(Quadrature Quadrature Phase Shift Keying) scheme which increases the signal space dimension and the QAM scheme which increases the bandwidth efficiency using the multi-level signal. The Q$^{2}$AM scheme has by far superior spectrum efficiency compared with the existing modulation schemes. Applying this scheme in the non-linear communication system increses the bandwidth efficiency but cannot envelop property. In this paper, a new system architecture is suggested which satisfies the large spectrum efficiency and constant envelope property by implementing the linear block coding prior to the Q$^{2}$AM modulation. the system has improved in performance by gaining the constant envelope and the additional coding gain. We able to observe the performance improvement of the suggested system(at BER=10$^{-5}$ ) of 4.4 dB for the 16-QAM and 0.7 dB for the Q$^{2}$PSK under the exact spectrum efficiency.
박인재,JerngChangYoon,SeongJooPark,EungHoKim,Yeon-JaeCho,Kwang-SooShin 한국미생물학회 2003 The journal of microbiology Vol.41 No.2
Four proteolytic bacteria were isolated and identified from a rotating biological contactor based on Bacillus. The four isolates, Ni 26, 36, 39 and 49 were identified as B. vallismortis, B. subtilis, Aeromonas hydrophila and B. amyloliquefaciens, respectively, based on their biochemical properties and 16S rDNA sequence analyses. The optimal proteolytic activity was observed in the temperature and pH ranges of 40-70ºC and 8.0-8.5, respectively. The proteolytic activities of all the isolates were partially inhibited by phenylmethylsulfonylfluoride (PMSF), and the isolates Ni 26, Ni 39 and Ni 49 were inhibited by the metalloprotease inhibitor, 1,10-phenanthroline. Zymographic analyses of the culture supernatants revealed the presence of at least two proteases in all isolates.
박인재,차세연,강민,소양섭,고희곤,손영호,문성필,류경선,장형관 한국가금학회 2010 韓國家禽學會誌 Vol.37 No.4
We evaluated the immunomodulatory effects of proanthocyanidin-rich extract (PAE) from Pinus radiata bark in broiler. Proliferation of peripheral blood mononuclear cells and thymocytes was significantly enhanced in 2.5, 5, 10 mg/kg PAE-treated broiler chickens. Proliferation of splenocytes was significantly enhanced in 1.25, 2.5, 5, 10 mg/kg PAE-treated broiler chickens. These effects were markedly enhanced by the presence of LPS, which acts on B cells responsible for humoral immunity, and Con A, which acts directly on T cells involved in cell mediated immunity. PAE significantly promoted the expression of interleukin-18 and interleukin-1β. Thus, PAE from P. radiata possesses immunomodulatory effects in broiler chickens.
박인재,이재근 한국정원학회 2002 한국전통조경학회지 Vol.20 No.4
This study is to classify and evaluate the changes of policies, sizes, and the administrative organizations of parks in Seoul. Reviewed with the changes examined up to now, most plans were temporary ones established on situations. So it would be better to make mid-term plans based on long-term plans. For the present conditions of parks, it appeared that city parks should be managed not by entrusting autonomous districts but by Seoul local government having park administative offices by 5-green land areas, and that citizens should be allowed to develop and operate management programs for parks. For its organization, officials in the bureau consisting of specialized experts should be appointed as the directors for the concerned special duties. And the field of park, leisure, ecology and sightseeing, etc. scattered in Seoul City organizations are to be emerged onto a scholastic category. For and it is recommend to connect organizations and scientific research.