Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Search Results: 1 - 10 of 32 matches for " Mariadhas Valan Arasu "
All listed articles are free for downloading (OA Articles)
Page 1 /32
Display every page Item
Isolation and identification of alkaloids and anthocyanins from flower and bulb of Lycoris radiata using HPLC and LC-ESI-MS  [PDF]
Jin-Hyuk Chun, In Hyuk Jang, Mariadhas Valan Arasu, Naif Abdullah Al-Dhabi, Veeramuthu Duraipandiyan, Dong-Hoon Lee, Sanghyun Lee, Sun-Ju Kim
Journal of Agricultural Chemistry and Environment (JACEN) , 2013, DOI: 10.4236/jacen.2013.21004
Abstract: Three anthocyanins (cyanidin 3-diglucoside, cyanidin 3-sambubioside and cyanidin 3-glucoside) together with eleven known alkaloids (lycoricidine, hipppeastrine,O-Demethyllycoramin, lycoricidinol, galanthine, lycorine, lycorenine, lycoramine, galanthamine, homolycorine and pretazettine) were identified in the flower and bulb of Lycoris radiata using high-performance liquid chromatography coupled with UV detection and electrospray ionization mass spectrometry. Anthocyanins play a major role in protecting plant’s DNA from the UV spectrum of sunlight and also in attracting insects for the purpose of pollination. Thus, knowledge on the contents and types of anthocyanins of L. radiata will help to evaluate the adaptive evolution of flowers and provide useful information for the ornamental breeding.
Quantitative differentiation of phenolic compounds in different varieties of buckwheat cultivars from China, Japan and Korea  [PDF]
Jeong Min Seo, Da Bin Lee, Mariadhas Valan Arasu, Qi Wu, Tatsuro Suzuki, Young-Ho Yoon, Sang-Won Lee, Sang Un Park, Sun-Ju Kim
Journal of Agricultural Chemistry and Environment (JACEN) , 2013, DOI: 10.4236/jacen.2013.24016
Abstract: The aim of this study was to determine the variation of phenolic compounds in common and tartary buckwheats collected from China, Japan and Korea. Two buckwheat varieties of each country were cultivated using nutrient solution and vermiculite in the greenhouse from February to May, 2012 and harvested at two-week intervals. Phenolics such as chlorogenic acid, C-glycosylflavones (orientin, isoorientin, vitexin, and isovitexin), rutin, and quercetin were quantified using high performance liquid chroma-tography (HPLC). At 17, 29, 44, 58, and 72 days after sowing (DAS), before harvesting each organs, rutin content of cultivars from China and Korea at 17 DAS was the highest (mean 43.63 and 39.95 mg?g–1 DW, respectively) than that of 29 and 44 DAS. However, two varieties from Japan at 44 DAS were documented maximum; whereas, the amount of rutin in “Hokkai T10” harvested at 44 DAS (58.36 mg?g–1 DW) was the highest of all cultivars. Rutin level in the leaves and stems at 72 DAS were comparatively higher than at 58 DAS. The highest of rutin content was found at 72 DAS (73.33 mg?g–1 DW) in “Hokkai T10” leaves followed by “Daegwan No.3-3” (61.13 mg?g–1 DW), “rice tartary” (53.89 mg?g–1 DW). Rutin content of flowers was presented as the highest amount in “Hokkai T10” at 72 DAS (88.3 mg?g–1 DW) was approximately 14-fold higher than that of 58 DAS (6.44 mg?g–1 DW). However, rutin content of flower in “Xiqiao No.2” was 3-fold higher at 72 DAS than at 58 DAS. Rutin and total phenolic compounds content in flowers, leaves, and stems were higher in the order. The content of four C-glycosylflavones in common buckwheat was higher than those in tartary buckwheat, but rutin content which accounted >90% of the total phenolic compounds was higher in tartary buckwheat. The highest amounts of chlorogenic acid and quercetin were measured in the flower of “Xiqiao No.2” (6.85 and 11.69 mg?g–1 DW, respectively). Based on these results, the presence of different phenolic compounds in all the varieties of buckwheat confirmed that it can be regarded as a potent source of functional foods.
Identification and Determination of Phenolic Compounds in Rapeseed Meals (Brassica napus L.)  [PDF]
Si-Chang Yang, Mariadhas Valan Arasu, Jin-Hyuk Chun, Young-Seok Jang, Yong-Hwa Lee, In Ho Kim, Ki-Taek Lee, Soon-Taek Hong, Sun-Ju Kim
Journal of Agricultural Chemistry and Environment (JACEN) , 2015, DOI: 10.4236/jacen.2015.41002
Abstract: This study aimed in the identification and quantification of phenolic compounds in different four varieties of rapeseeds (Brassica napus L.) using LC-MS and HPLC. LC-MS analysis guided to identify 12 phenolic compounds including sinapine, sinapine(4-O-8')guaiacyl, feruloyl choline(4-O-8') guaiacyl, kaempferol-3-O-sinapoyl-sophoroside-7-O-glucoside, kaempferol-3-O-β-sophoroside, cyclic spermidine-alkaloid, feruloyl choline(5-8')guaiacyl, kaempferol-sinapoyl-trihexoside,1,2-di- O-sinapoyl-gentiobiose, 1,2-di-O-sinapoyl-glucose, feruloyl choline(4-O-8')guaiacyl-di-sinapoyl, and sinapine(4-O-8')guaiacyl-di-sinapoyl, respectively. Total phenolic compounds in rapeseed meals were ranged from 38.50 (2012 “Sunmang”) to 63.95 mg/g dry weight (DW) (2014 Jeju local cultivar). Main phenolic compositions were cyclic spermidine-alkaloid, kaempferol, feruloyl choline, and sinapine. Sinapine was predominant compound among all the samples ranged from 29.74 to 52.24 mg/g DW (mean 79% of total phenolic contents). This study provided the information for the variation of phenolic compounds between the varieties of rapeseeds and the cultivation periods. Furthermore, this information can be developed for bio-energy industry as a reducer of the cost of the bio-energy products.
In Vitro and In Vivo Enhancement of Adipogenesis by Italian Ryegrass (Lolium multiflorum) in 3T3-L1 Cells and Mice
Mariadhas Valan Arasu, Soundharrajan Ilavenil, Da Hye Kim, Sang Gun Roh, Jeong-Chae Lee, Ki Choon Choi
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0085297
Abstract: Adipogenesis is very much important in improving the quality of meat in animals. The aim of the present study was to investigate the in vitro and in vivo adipogenesis regulation properties of Lolium multiflorum on 3T3-L1 pre-adipocytes and mice. Chemical composition of petroleum ether extract of L. multiflorum (PET-LM) confirmed the presence of fatty acids, such as α-linolenic acid, docosahexaenoic acid, oleic acid, docosatetraenoic acid, and caprylic acid, as the major compounds. PET-LM treatment increased viability, lipid accumulation, lipolysis, cell cycle progression, and DNA synthesis in the cells. PET-LM treatment also augmented peroxysome proliferator activated receptor (PPAR)-γ2, CCAAT/enhancer binding protein-α, adiponectin, adipocyte binding protein, glucose transporter-4, fatty acid synthase, and sterol regulatory element binding protein-1 expression at mRNA and protein levels in differentiated adipocytes. In addition, mice administered with 200 mg/kg body weight PET-LM for 8 weeks showed greater body weight than control mice. These findings suggest that PET-LM facilitates adipogenesis by stimulating PPARγ-mediated signaling cascades in adipocytes which could be useful for quality meat development in animals.
Lie Group Analysis for the Effects of Variable Fluid Viscosity and Thermal Radiation on Free Convective Heat and Mass Transfer with Variable Stream Condition  [PDF]
P. Loganathan, P. Puvi Arasu
Engineering (ENG) , 2010, DOI: 10.4236/eng.2010.28080
Abstract: Natural convective boundary layer flow and heat and mass transfer of a fluid with variable viscosity and thermal radiation over a vertical stretching surface in the presence of suction/injection is investigated by Lie group analysis. Fluid viscosity is assumed to vary as a linear function of temperature. The symmetry groups admitted by the corresponding boundary value problem are obtained by using a special form of Lie group transformations viz. scaling group of transformations. An exact solution is obtained for translation symmetry and numerical solutions for scaling symmetry. The effects of fluid viscosity and thermal radiation on the dimensionless velocity, temperature and concentration profiles are shown graphically. Comparisons with previously published works are performed and excellent agreement between the results is obtained. The conclusion is drawn that the flow field and temperature profiles are significantly influenced by these parameters.
Bhad is paplūdimyje: hibridin tapatyb ir populiarieji diskursai Did iosios Britanijos diasporiniame kine | Bhaji on the Beach: Hybrid Identity and Popular Discourses in British Diasporic Cinema
Deimantas Valan?iūnas
Literatura , 2012,
Abstract: Gurinder Chadha is a British South Asian diasporic director who attained international acclaim releas-ing films Bend it like Beckham (2002) and Bride and Prejudice (2004). However, her first feature film Bhaji on the Beach (1993) is one of the finest exam-ples of British diasporic films. Released in the sensi-tive post-Thatcheric era, it investigates the complex issues of gender relations, racism, domestic violence, and hybridity in the diasporic environment. The film director also emphasizes different ideological for-mations which are produced in, and disseminated through popular discourses. Therefore this article ex plores the ways identity is constructed through vari-ous ideological and nationalistic discourses embed-ded in the popular culture, particularly in Bollywood and imperial British cinema and heritage films. Such popular discourses are seen as major ideological forces used to establish monolithic and fixed identity, creating disruptions and crises when it clashes with contemporary hybrid British culture.
Utilization of Meat and Bone Meal Bottom Ash in Ceramics
Virginija VALAN?IEN?
Materials Science , 2011, DOI: 10.5755/j01.ms.17.1.256
Abstract: During utilization of animal waste meat and bone meal (MBM) is received, realization and use of which has been stopped due to risk for the transmission of the bovine spongiform encephalopathy infection. The MBM must be safely stored or treated. Most often meat and bone meal undergoes thermal treatment. During combustion large quantities of residues (ashes) are received, the recycled use of which has been given a lot of attention lately. In this work it was investigated the impact of the additive of the bottom ash (BA) formed during combustion of the MBM on the properties of forming mass and ceramic body of hydromica clay, and also it was evaluated a possibility to use the MBM BA in manufacturing of building ceramics. After replacing the sand in porous ceramics by this additive the plasticity of the forming mass, drying and firing shrinkage as well as density of ceramic body changed insignificantly whereas the compressive strength increased by 8 % - 22 %. So the MBM BA can be utilized in production of porous ceramics. http://dx.doi.org/10.5755/j01.ms.17.1.256
Oblivious Query Processing
Arvind Arasu,Raghav Kaushik
Computer Science , 2013,
Abstract: Motivated by cloud security concerns, there is an increasing interest in database systems that can store and support queries over encrypted data. A common architecture for such systems is to use a trusted component such as a cryptographic co-processor for query processing that is used to securely decrypt data and perform computations in plaintext. The trusted component has limited memory, so most of the (input and intermediate) data is kept encrypted in an untrusted storage and moved to the trusted component on ``demand.'' In this setting, even with strong encryption, the data access pattern from untrusted storage has the potential to reveal sensitive information; indeed, all existing systems that use a trusted component for query processing over encrypted data have this vulnerability. In this paper, we undertake the first formal study of secure query processing, where an adversary having full knowledge of the query (text) and observing the query execution learns nothing about the underlying database other than the result size of the query on the database. We introduce a simpler notion, oblivious query processing, and show formally that a query admits secure query processing iff it admits oblivious query processing. We present oblivious query processing algorithms for a rich class of database queries involving selections, joins, grouping and aggregation. For queries not handled by our algorithms, we provide some initial evidence that designing oblivious (and therefore secure) algorithms would be hard via reductions from two simple, well-studied problems that are generally believed to be hard. Our study of oblivious query processing also reveals interesting connections to database join theory.
Investigational Validation of PV Based DCD-MLI Using Simplified SVM Algorithm Utilizing FPGA Tied with Independent Sources  [PDF]
M. Valan Rajkumar, P. Prakasam, P. S. Manoharan
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.711320
Abstract: This paper presents the independent source tied photovoltaic (PV) based three-phase three-level diode-clamped-multilevel inverter (DCD-MLI) utilizing field programmable gate array (FPGA) controller. The maximum power point (MPP) is tracked by using fuzzy logic algorithm. Employed for gating signal generation, the space vector modulation (SVM) strategy eradicates the complexity in determining the reference vector location, the ON-time calculations and switching state selection. A digital proportional integral (PI) control algorithm is implemented on a FPGA to keep the current injected into the independent source (grid) sinusoidal and to achieve high dynamic performance with low total harmonic distortion (THD) of output voltage and output current which are 0.97% and 1.26%. With the proposed configuration, the adjustments of modulation index and phase angle are synthesized onto a FPGA by means of hardware description language (VHDL). The efficacy of the scheme is verified through simulation study. To confirm the feasibility of the scheme, experimental studies are carried out on a scaled-down laboratory prototype.
Health-Related Internet Information Both Strengthens and Weakens Parents’ Potential for Self-Care—A Mixed-Methods Study on Parents’ Search Patterns  [PDF]
Lotha Valan, Lisbeth Kristiansen, Karin Sundin, Mats Jong
Open Journal of Nursing (OJN) , 2018, DOI: 10.4236/ojn.2018.810055
Abstract: Background: Today’s parents belong to the digital generation and regularly use the Internet as a source of information. Parents’ quests for health-related online information comprise an effort to manage symptoms of illness or address questions about child development which may be an expression of self-management or self-care. Purpose: This study aims to describe health and child development related Internet search patterns used by parents of children ages zero to six, and further, how the obtained information was used in contacts with Child Health Care. Design and Methods: A two-step mixed- method approach is used in this study, comprising both a quantitative and a qualitative approach. First, a questionnaire was distributed to parents (n = 800) at 13 health centers in a medium sized county in Sweden. Second, one narrative interview with two parents total was conducted. Descriptive and non-parametric statistics were calculated, and qualitative manifest content analyses were performed. Results: A total of 687 completed the questionnaire, which corresponds to a response rate of 86%. The results show that 97% used the Internet for health-related and developmental child issues. The results show that parents often look at basic tips and the Internet is seen as a fast and accessible forum to obtain information. Parents often initiated their Internet searches using Google search for the specific subject, but the most common and most used website (used by 95% of parents), was the Swedish health site 1177.se. 98.4% of parents evaluated the general information searches they made on the Internet as reliable despite only 31% of the parents checking to see if the websites they used were scientifically based. Parents (81.7%) stated that they wanted their Child Health Nurses (CHN) to give them recommendations for valid websites. Conclusions: The results in this study show that, on the one hand, the Internet could strengthen parental knowledge (support self-care capacity), but, on the other hand, the found information could worry them and increase their anxiety—negatively affected self-care capacity. The parents suggested that the information should be double-checked to establish trust and develop self-care knowledge. Having a good resource to rely on, such as personal contact with a CHN, or using reliable websites seems to strengthen and reassure parents.
Page 1 /32
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.