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Broad Spectruc Anti-bacterial Activity of the Leaves , Stem and Root Barks of Myristica subabulata
M. R. Khan,M. Kihara,A. D. Omoloso 한국생약학회 2001 Natural Product Sciences Vol.7 No.1
A number of Myristica species are used in herbal medicine for a variety of ailments. The methanol extracts of the leaves and the stem and root barks of Myristica subabulata were fractionated into petrol, dichloromethane and finally ethyl acetate. These were then screened against a total of 31 micro-organisms comprising of 13 G +ve, 12 G ve, one protozoa and 5 moulds. A broad-spectrum antibacterial activity was observed. As compared to fractionated the un-fractionated extracts exhibited much better level of activity.
Optimal Placement and Control of BESS for a Distribution System Integrated with PV systems
Kihara, Hiroyuki,Yokoyama, Akihiko,Liyanage, Kithsiri M.,Sakuma, Hisato The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.3
Recently, photovoltaic generation (PV) has attracted a great attention as one of green power generations. Accordingly a large amount of PV systems will be installed in residential areas in the coming years. In such scenario, reverse power flow caused by PV in feeders may cause some problems such as voltage rise over upper limits in the distribution line, and the reverse power flow into the distribution substation. Battery energy storage system (BESS) is a promising option to solve the above both problems at the same time. However, the effect of BESS depends on location of BESS. Therefore, it is necessary to consider an appropriate location in the residential distribution system to install BESS to obtain an optimal effect. This paper investigates an optimal placement pattern of BESS in the residential distribution system with certain patterns of PV installation. It has been made clear that the obtained results can determine the best placement pattern of BESS with the minimum required BESS capacity and power loss.
Performance Analysis of Ubiquitous Power Systems under Coordinated Control of System Elements
Liyanage, Kithsiri M.,Masuta, Taisuke,Shimizu, Koichiro,Kihara, Hiroyuki,Yokoyama, Akihiko,Ota, Yutaka,Nakajima, Tatsuhito,Taniguchi, Haruhito The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.1
The trend of integrating renewable energy sources into power networks is becoming common in practice, making power systems to be more ubiquitous in nature. The connection of renewable sources in large numbers at distribution level could cause adverse power fluctuations. By employing battery energy storage systems, these fluctuations can be reduced. However economic constraints imposed by high battery cost may not justify liberal use of battery storage to control power fluctuations. The authors have previously shown the possibility of reducing battery energy storage systems' capacity without degrading the performance in terms of energy capturing efficiency and arresting power fluctuations of a ubiquitous power network through coordinated control of elements. Meantime there are attempts to make use the battery energy storage available in electric vehicles to provide a cushion against power and frequency fluctuations caused by renewable generation. In this paper authors presents a comparison between the effectiveness of conventional battery energy storage system and that of battery energy storage available in electric vehicles to improve the performance of ubiquitous power network under coordinated control. This study has shown that energy storage from electric vehicles can outperform conventional battery energy storage systems of similar capacity range under certain conditions.
Alkam, T.,Mamiya, T.,Kimura, N.,Yoshida, A.,Kihara, D.,Tsunoda, Y.,Aoyama, Y.,Hiramatsu, M.,Kim, H. C.,Nabeshima, T. Springer Science + Business Media 2017 Psychophamacology Vol.234 No.12
<P>Increased risk of attention-deficit/hyperactivity disorder (AD/HD) is partly associated with the early developmental exposure to nicotine in tobacco smoke. Emerging reports link tobacco smoke exposure or prenatal nicotine exposure (PNE) with AD/HD-like behaviors in rodent models. We have previously reported that PNE induces cognitive behavioral deficits in offspring and decreases the contents of dopamine (DA) and its turnover in the prefrontal cortex (PFC) of offspring It is well known that the dysfunction of DAergic system in the brain is one of the core factors in the pathophysiology of AD/HD. Therefore, we examined whether the effects of PNE on the DAergic system underlie the AD/HD-related behavioral changes in mouse offspring. PNE reduced the release of DA in the medial PFC (mPFC) in mouse offspring. PNE reduced the number of tyrosine hydroxylase (TH)-positive varicosities in the mPFC and in the core as well as the shell of nucleus accumbens, but not in the striatum. PNE also induced behavioral deficits in cliff avoidance, object-based attention, and sensorimotor gating in offspring. These behavioral deficits were attenuated by acute treatment with atomoxetine (3 mg/kg, s.c.) or partially attenuated by acute treatment with MPH (1 mg/kg, s.c.). Taken together, our findings support the notion that PNE induces neurobehavioral abnormalities in mouse offspring by disrupting the DAergic system and improve our understanding about the incidence of AD/HD in children whose mothers were exposed to nicotine during their pregnancy.</P>