Antioxidant activity of water and alcohol extracts of Thuja orientalis leaves

Iram Nizam,M Mushfiq 경희대학교 융합한의과학연구소 2007 Oriental Pharmacy and Experimental Medicine Vol.7 No.1

Water and alcohol extracts were prepared from dried and powdered leaves of Thuja orientalis (T. orientalis). The reducing power, total phenolic content, the 1,1-diphenyl-2-picrylhydrazyl scavenging activity, inhibitory effect on Fe (II)-EDTA-H2O2 (Fenton reaction system) induced DNA damage and inhibitory effect on human red blood cell (RBC) hemolysis were evaluated in the present study. At a concentration of 200 mg, water and alcohol extracts of T. orientalis inhibited the hydrolysis of DNA by 72.859% and 65.312%, respectively. Water and alcohol extracts of T. orientalis also inhibited 2,2’-Azobis(2-amidinopropane) dihydrochloride induced RBC hemolysis to the extent of 69.30% and 54.55%, respectively. The reducing power and antioxidative activity of water extract was found to be more than that of alcohol extract. This is attributable to the presence of higher amount of phenolic compounds in water extract. The present results indicate that the T. orientalis extracts are rich sources of natural antioxidants and can protect DNA and human red blood cells against free radical induced oxidative damage.

A Genetic Algorithm-based Classifier Ensemble Optimization for Activity Recognition in Smart Homes

( Iram Fatima ),( Muhammad Fahim ),( Young-koo Lee ),( Sungyoung Lee ) 한국인터넷정보학회 2013 KSII Transactions on Internet and Information Syst Vol.7 No.11

Over the last few years, one of the most common purposes of smart homes is to provide human centric services in the domain of u-healthcare by analyzing inhabitants` daily living. Currently, the major challenges in activity recognition include the reliability of prediction of each classifier as they differ according to smart homes characteristics. Smart homes indicate variation in terms of performed activities, deployed sensors, environment settings, and inhabitants` characteristics. It is not possible that one classifier always performs better than all the other classifiers for every possible situation. This observation has motivated towards combining multiple classifiers to take advantage of their complementary performance for high accuracy. Therefore, in this paper, a method for activity recognition is proposed by optimizing the output of multiple classifiers with Genetic Algorithm (GA). Our proposed method combines the measurement level output of different classifiers for each activity class to make up the ensemble. For the evaluation of the proposed method, experiments are performed on three real datasets from CASAS smart home. The results show that our method systematically outperforms single classifier and traditional multiclass models. The significant improvement is achieved from 0.82 to 0.90 in the F-measures of recognized activities as compare to existing methods.

Morphogenic Response of the Alginate Encapsulated Nodal Segment and Antioxidative Enzymes Analysis during Acclimatization of Ocimum basilicum L.

Iram Siddique, M. Anis 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.4

Synthetic seed technology is a potential tool for a more efficient and cost effective rapid clonal propagation system. In the present investigation, synthetic seeds were produced by encapsulating nodal segments of Ocimum basilicum in calcium alginate gel. For encapsulation of nodal segment, 3% (w/v) sodium alginate and 75 mM CaCl2.2H2O were found most suitable. The synthetic seeds when cultured on half-strength Murashige and Skoog (MS) medium supplemented with 5.0 μM benzyladenine (BA) and 0.5 μM Indole -3- acetic acid (IAA) produced maximum number of shoots (7.9 ± 0.54) after 8 weeks of culture exhibiting 80% in vitro conversion response. Further, synthetic seeds stored at 4 °C for 4 weeks resulted in maximum conversion response (90%) when placed back to regeneration medium. Both root and shoot formation took place in the same medium but the roots were thin and difficult to handle. Individual elongated shoots were rooted on MS medium supplemented with 1.0 μM Indole -3- butyric acid (IBA). Plants regenerated from the synseeds were hardened, acclimatized, and established in soil with 80% survival rate. Changes in antioxidative enzymes viz., Superoxide dismutase (SOD) and Catalase (CAT) in O. basilicum indicated the adaptation of micropropagated plants to ex vitro conditions. Synthetic seed technology is a potential tool for a more efficient and cost effective rapid clonal propagation system. In the present investigation, synthetic seeds were produced by encapsulating nodal segments of Ocimum basilicum in calcium alginate gel. For encapsulation of nodal segment, 3% (w/v) sodium alginate and 75 mM CaCl2.2H2O were found most suitable. The synthetic seeds when cultured on half-strength Murashige and Skoog (MS) medium supplemented with 5.0 μM benzyladenine (BA) and 0.5 μM Indole -3- acetic acid (IAA) produced maximum number of shoots (7.9 ± 0.54) after 8 weeks of culture exhibiting 80% in vitro conversion response. Further, synthetic seeds stored at 4 °C for 4 weeks resulted in maximum conversion response (90%) when placed back to regeneration medium. Both root and shoot formation took place in the same medium but the roots were thin and difficult to handle. Individual elongated shoots were rooted on MS medium supplemented with 1.0 μM Indole -3- butyric acid (IBA). Plants regenerated from the synseeds were hardened, acclimatized, and established in soil with 80% survival rate. Changes in antioxidative enzymes viz., Superoxide dismutase (SOD) and Catalase (CAT) in O. basilicum indicated the adaptation of micropropagated plants to ex vitro conditions.

Chemical Bonding of Organic Dye onto Cotton Fibers Using Silane as Coupling Agent (I)

Iram Batool,Gul Bali Shah 한국섬유공학회 2018 Fibers and polymers Vol.19 No.4

A derivative of an optical brightening agent (organic dye), i.e., 2,6-dibromo-4-flouroaniline (synthesized and reported previously) has been chemically bonded to cotton fabrics through a coupling agent, i.e., 3-(2-aminoethylamino)- propyltrimethoxy silane. These chemically treated cotton fabrics have been characterized by FTIR spectroscopy, color observation, tear properties determination, and UV-DRS analysis. The relevant spectra of FTIR confirm chemical bonding of the silane with cotton on one end and with the dye on the other. Comparison of the various treated and untreated cotton samples before and after washing by visual observations confirms the claim of chemical bonding of the dye with the cotton. The consistent decreasing patterns observed in tear strengths of the treated cloths with increase in concentration of the respective chemical validate modification of the cotton cloths. UV-DRS analysis of the modified cotton cloths show that the reflectance decreases with the use of silane.

Design of slotted UWB Antenna with modified Ground Plane for Bio Medical Applications

Iram Nadeem,Sujan Shrestha,Sun-Woong Kim,Seung-Jo Han,Dong-You Choi 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.1

A modified design of microstrip planer ultra-wide band antenna with multiple strips and slots in patch along with a new ground architecture is simulated. The 3.0 to 10.9 GHz frequency range is covered by proposed antenna having overall dimensions of 25 (L) × 16 (W) × 0.8 (h)mm³ . Its characteristics have been observed by numerical simulations in term of maximum gain, omnidirectional radiation pattern, reflection coefficient, and minimum group delay. With features such as a very small size, low operational frequency shows its high potential for applications such as stroke in human brain detection, breast cancer detection and more relevant medical purpose.

Design of a UWB Patch Antenna for with U-Shaped Narrow Strip Structures

Iram Nadeem(이람 나담),Young-Jin Kim(김영진) 한국통신학회 2017 韓國通信學會論文誌 Vol.42 No.9

Design of Ultra-Wide Band Antenna with Compact MCR Structure for BW Enhancement

Iram Nadeem(이람 나담),Young-Jin Kim(김영진) 한국통신학회 2017 韓國通信學會論文誌 Vol.42 No.4

Creativity, Communication and Collaboration: The Identification of Pedagogic Progression in Sustained Shared Thinking

Iram Siraj-Blatchford 환태평양유아교육연구학회 2007 Asia-Pacific journal of research in early childhoo Vol.1 No.2

The central purpose of this paper has been to provide a conceptual model that is capable of supporting the development of appropriate early childhood practices for the 21st Century. A strong consensus has emerged regarding the importance of devel- oping Communication, Collaboration and Creativity during the early years. The paper argues that these three principles are related to each other very closely at the level of theory and in some of the very best early childhood education practice. It is argued that, at the level of practice; creativity, communication, and collaboration are all combined in ‘sustained shared thinking’, which has been identified as a particularly effective pedagogic strategy in the qualitative case studies conducted to support the longitudinal study Effective Provision of Pre-School Education in England (Siraj- Blatchford and Sylva, 2004). These ‘three Cs’ (Communication, Collaboration and Creativity) are also explicitly prioritised in each of the five international models of early childhood education (ECE) identified in the 2004 Starting Strong: Curricula and Pedagogies in Early Childhood Education and Care Report (OECD, 2004). But it is extremely important to recognise that the pedagogic form that ‘Sustained Shared Thinking’ takes with children under age two is quite different from that most appro- priate for three to five year olds when, in their socio-dramatic play, young children are quite naturally separating objects and actions from their meanings in the real world and giving them new meanings. By around age five, children’s powers of ex- pression and abstraction may also be enhanced when they are encouraged to commu- nicate these creative representations in the play room (van Oers, 1999). The paper concludes by identifying some key principles to be applied in developing effective ‘Pedagogic Progression’ in nurseries and kindergartens that often cater for a broad age range of young children. These were illustrated at the PECERA

The Role of Professional Development in Improving Quality and Supporting Child Outcomes in Early Education and Care

Iram Siraj,Denise Kingston,Cathrine Neilsen-Hewett 환태평양유아교육연구학회 2019 Asia-Pacific journal of research in early childhoo Vol.13 No.2

A skilled workforce that understands the needs of children and can deliver high quality curricula to children with diverse needs, is required in order to realise the wide-ranging benefits that could follow from public investment in ECEC provision (such as in-service Professional Development (PD)). It is well established in the literature that high quality ECEC is important for children’s outcomes, and that variations in quality can be explained, to a large extent, by variations in educator pedagogy and practice. We argue for a better understanding of how ECEC educators and services can achieve (and be supported to optimise) children’s development and learning outcomes. This paper argues for more rigorous PD designs, considered evidence-based content and delivery that are embedded within a rich evidence-base of practice, and that focus on educator effectiveness, practice change, and also on the benefits to children’s learning and development. The paper draws upon effective PD literature and describes lessons learnt, focussing on the ‘who’, ‘what’ and ‘how’ of evaluation of effective in-service PD design and delivery.

Morphogenic Response of the Alginate Encapsulated Nodal Segment and Antioxidative Enzymes Analysis during Acclimatization of Ocimum basilicum L.

Siddique, Iram,Anis, M. 한국작물학회 2009 Journal of crop science and biotechnology Vol.12 No.4

Synthetic seed technology is a potential tool for a more efficient and cost effective rapid clonal propagation system. In the present investigation, synthetic seeds were produced by encapsulating nodal segments of Ocimum basilicum in calcium alginate gel. For encapsulation of nodal segment, 3% (w/v) sodium alginate and 75 mM $CaCl_2.2H_2O$ were found most suitable. The synthetic seeds when cultured on half-strength Murashige and Skoog (MS) medium supplemented with $5.0\;{\mu}M$ benzyladenine (BA) and $0.5\;{\mu}M$ Indole -3- acetic acid (IAA) produced maximum number of shoots ($7.9\;{\pm}\;0.54$) after 8 weeks of culture exhibiting 80% in vitro conversion response. Further, synthetic seeds stored at $4^{\circ}C$ for 4 weeks resulted in maximum conversion response (90%) when placed back to regeneration medium. Both root and shoot formation took place in the same medium but the roots were thin and difficult to handle. Individual elongated shoots were rooted on MS medium supplemented with $1.0\;{\mu}M$ Indole -3- butyric acid (IBA). Plants regenerated from the synseeds were hardened, acclimatized, and established in soil with 80% survival rate. Changes in antioxidative enzymes viz., Superoxide dismutase (SOD) and Catalase (CAT) in O. basilicum indicated the adaptation of micropropagated plants to ex vitro conditions.