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Search Results: 1 - 10 of 12403 matches for " Mathew George "
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Pharmacognostical profiling of Geranium ocellatum leaves
International Journal of Medicinal and Aromatic Plants , 2011,
Abstract: Geranium ocellatum commonly known as black eyed Geranium. In the present study pharmacognostical characterization of Geranium ocellatum leaves were conducted. Leaf constants like stomatal number, stomatal index, palisade ratio, vein-islet number, veinlet termination number have been determined. Physico-chemical characteristic like moisture content, etc were determined. Ash values like total ash value, acid insoluble ash value, water soluble ash value found out. Experiments for determining extractive values like alcohol soluble extractive value and water soluble extractive value done.
Global burden of trauma: Need for effective fracture therapies
Mathew George,Hanson Beate
Indian Journal of Orthopaedics , 2009,
Abstract: Orthopedic trauma care and fracture management have advanced significantly over the last 50 years. New developments in the biology and biomechanics of the musculoskeletal system, fixation devices, and soft tissue management have greatly influenced our ability to care for musculoskeletal injuries. Many therapies and treatment modalities have the potential to transform future orthopedic treatment by decreasing invasive procedures and providing shorter healing times. Promising results in experimental models have led to an increase in clinical application of these therapies in human subjects. However, for many modalities, precise clinical indications, timing, dosage, and mode of action still need to be clearly defined. In order to further develop fracture management strategies, predict outcomes and improve clinical application of newer technologies, further research studies are needed. Together with evolving new therapies, the strategies to improve fracture care should focus on cost effectiveness. This is a great opportunity for the global orthopedic community, in association with other stakeholders, to address the many barriers to the delivery of safe, timely, and effective care for patients with musculoskeletal injuries in developing countries.
Reflective Classroom Practice for Effective Classroom Instruction
Nalliveettil George Mathew
International Education Studies , 2012, DOI: 10.5539/ies.v5n3p205
Abstract: Improving English language skills of learners is a strenuous task because of the variations in culture, background and learning styles. This strenuous task is further aggravated when English teachers realizes the proficiency level of students is far too low that his/her expectation. In most of the ESL and EFL context, English teachers rely on mid-term test to evaluate the proficiency level of the students. Blame game follows when there are too many failures in the classroom. Teachers blame the students for giving least importance to English language which resulted in low scores while the students blame the teacher for making the exam tough. The college/university management considers failure of students as a failure of the teachers in the classroom teaching. The information presented in this paper is an alarming wakeup call and a reminder for the teachers to be constant self-evaluators of their classroom teaching rather than waiting for the results of a test to understand the students’ progress in classroom. This paper gives insights to the struggling teachers to succeed through reflective teaching practices.
A Comparison of Pinch Force between Finger and Palm Grasp techniques in Laparoscopic Grasping  [PDF]
Susmitha Wils K, George Mathew, M. Manivannan, Suresh R Devasahayam
Engineering (ENG) , 2012, DOI: 10.4236/eng.2012.410B012

Laparoscopic surgery is a new abdominal surgical procedure which helps the patients in many ways like less hospital stay, faster recovery and reduced pain. The main disadvantage in this surgical procedure is the reduced haptic perception by the surgeons due to the usage of laparoscopic instrument to handle tissues which in turn cause damage of it as compared to an open surgery. The primary aim of this investigation was to compare the pinch force applied during two different methods of laparoscopic grasping: Finger and Palm grasp. A low cost force sensing resistor tailor made for the grasper tip was designed and fabricated for quantifying the grasper tip force in the study. The results indicate more pinch force was applied during palm grasp as compared to finger grasp so as to prevent the slippage of the tissues from the jaws of the laparoscopic graspers.

Primary non Hodgkin's lymphoma of the lacrimal sac
Ramachandran Venkitaraman, Mathew K George
World Journal of Surgical Oncology , 2007, DOI: 10.1186/1477-7819-5-127
Abstract: The clinical features of a 78 year old female who presented with epiphora and swelling of the left lacrimal sac are described.Computerised tomography showed a mass involving the left lacrimal sac. Histopathological examination revealed a diffuse large B cell NHL. Immunohistological examination demonstrated B cell origin. Chemotherapy could not be administered due to co morbid conditions. The patient was treated with radiotherapy to a dose of 45 Gy in 25 fractions. Patient is disease free and on follow up after 36 months.Primary radiotherapy is a treatment option with curative potential for localized NHL of the lacrimal sac and may be considered in patients who cannot tolerate appropriate chemotherapy.Tumors involving the nasolacrimal drainage system are rare and more than 90% of these tumours are of epithelial origin [1]. Majority of lymphomas involving the lacrimal sac are secondary to systemic lymphoreticular malignancy [1]. Primary non Hodgkin's lymphoma (NHL) of the lacrimal sac is a rare neoplasm [2-6]. Therefore, the clinicopathological features and optimal management of primary lacrimal sac NHL are not well characterized.In this report, we present the clinical features of a patient with primary NHL of the lacrimal sac treated successfully with radiotherapy.A 78 year old female patient presented with epiphora of the left eye of 6 months duration and a painless swelling of the left lacrimal sac area of 2 months duration. Physical examination showed a firm, non-tender mass measuring 3 × 4 cm in the right lacrimal fossa. Irrigation test revealed complete obstruction of the lacrimal drainage system. Rest of the eye and adnexae were normal. Computerised tomography (CT) scan of the orbit showed a heterogeneous soft tissue mass arising from the lacrimal sac, infiltrating and pushing the globe laterally and forward, causing exophthalmos with no bony erosion (figure 1). There was homogenous and intense enhancement with contrast.An incision biopsy was performed from the
Minimization of Collision in Energy Constrained Wireless Sensor Network  [PDF]
Moses Nesa SUDHA, Muniappan Lakshapalam VALARMATHI, George RAJSEKAR, Michael Kurien MATHEW, Nagarajan DINESHRAJ, Sivasankaran RAJBARATH
Wireless Sensor Network (WSN) , 2009, DOI: 10.4236/wsn.2009.14043
Abstract: Wireless Sensor Networks (WSNs) are one of the fastest growing and emerging technologies in the field of Wireless Networking today. The applications of WSNs are extensively spread over areas like Military, En-vironment, Health Care, Communication and many more. These networks are powered by batteries and hence energy optimization is a major concern. One of the factors that reduce the energy efficiency of the WSN is collision which occurs due to the high density of data packets in a typical communication channel. This paper aims at minimizing the effects of congestion leading to collision in the network by proposing an effective algorithm. This can be done by optimizing the size of the contention window by introducing pa-rameters like source count and α. If the contention window of a node is low, it results in collision. If the size of the contention window of a node is high then it results in a medium access delay. Thus minimizing colli-sion and medium access delay of data packets conserve energy.
Improved Clonal Propagation of Alpinia calcarata Rosc., a Commercially Important Medicinal Plant and Evaluation of Chemical Fidelity through Comparison of Volatile Compounds  [PDF]
Charantharayil Gopalan Sudha, Mathew George, Koranappallil Bahuleyan Rameshkumar, Govindapillai Mohanadasan Nair
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.37110
Abstract: An efficient and improved clonal propagation of Alpinia calcarata, a commercially important medicinal plant was established on Murashige and Skoog medium. The axillary shoot proliferation was achieved with maximum 5.2 ± 0.7 shoots in 92.8% of rhizome explants in medium with 2.0 mg/L 6-benzylamiopurine (BAP) and 0.2 mg/L indole-3-acetic acid (IAA). Axillary shoot buds (60%) upon subculture for 8 weeks in the same medium produced multiple shoot initials (12.1 ± 0.4) mediated with meristemoids (4.0 ± 0.5) and callus. A gradual reduction in the concentration of BAP or elimination of IAA was required for rapid induction of normal plants devoid of callus from propagules during subsequent subculture. Single clump of 3-4 multiple shoot initials during second subculture on medium with 1.0 mg/L BAP and 0.1 mg/L IAA yielded an average of 21 shoots which was best among different propagules tried. The shoot multiplication rate was further enhanced to 32 shoots when the similar propagules passed to third subculture on medium with 1.0 mg/L BAP alone. Clumps of multiple shoot initials upon subculture on medium with 1.0 mg/L BAP alone exhibited 10 fold multiplication rates. Use of liquid medium in culture bottles with polypropylene caps supported fast growth of the shoots and spontaneous root formation on 50% of the shoots. Shoots transferred to half-strength MS liquid medium with 0.2 mg/L of IAA and IBA was optimum for maximum roots (8.14 ± 1.34) in 100% shoots. The rooted plants were hardened in mist chamber showed 95% survival and well established in the field. The acclimatized plants showed rhizome formation after 4-6 weeks of growth under shade house. Volatile chemicals profile of the leaves, rhizome and root of the in vitro and conventionally propagated plants analyzed by gas chromatography-mass spectrometry were qualitatively and quantitatively similar. The analysis of growth characteristics of 36 month old in vitro and conventionally propagated plants showed a 50% increment of rhizome fresh biomass with prolific root and leaf growth in the former than the latter ones. The protocol described herein will have practical applications for the large scale production of uniform efficient plants for commercial cultivation of A. calcarata.
Photo-Fries rearrangements of 1-naphthyl (R)-2-phenylpropanoate in poly(vinyl acetate) and ethyl acetate: influence of medium polarity and polymer relaxation on motions of singlet radical pairs
Xu, Jinqi;George, Mathew;Weiss, Richard G.;
Anais da Academia Brasileira de Ciências , 2006, DOI: 10.1590/S0001-37652006000100005
Abstract: both the regio- and stereo-chemistries of the photoreactions of 1-naphthyl (r)-2-phenylpropanoate have been investigated in poly(vinyl acetate) films in their glassy (at 5oc) and melted (at 50oc) states and in ethyl acetate. these results are compared with those from irradiations in polyethylene films and in n-hexane. the regioselectivity of the intermediate 1-naphthoxy/(r)-2-phenylpropanoyl radical pair combinations is much higher in both the melt and glassy states of poly(vinyl acetate) films than that in the melt state of completely amorphous polyethylene films, but the stereoselectivity of intermediate prochiral 1-naphthoxy/1-phenylethyl radical pair combinations is much lower in poly(vinyl acetate). the results emphasize the need to control the ratio between the rates of radical tumbling and translation, as well as the ratio between the rates of in-cage motions and cage-escape, if high stereo- and regio-selectivities of combination products are to be achieved. a mechanistic picture of how the radicals of the intermediate pairs are affected by and interact with the various media is advanced.
Steel Slag ingredient for concrete pavement
International Journal of Innovative Research in Science, Engineering and Technology , 2013,
Abstract: Steel slag is an industrial by-product of steel industry. It possesses the problem of disposal as waste and is of environmental concern [9]. The demand for aggregate in construction industry is increasing rapidly and so is the demand for concrete. Thus it is becoming more important to seek suitable alternatives for aggregates in the future. In this study, the natural coarse aggregates (NCA) were replaced with steel slag aggregate (SSA) at various proportions of 20%, 40%, 60%, 80% and 100%. Experiments were conducted to determine the compressive strength, flexural strength and split tensile strength of concrete with various percentages of steel slag aggregate. The results were compared with conventional concrete.
Insights into the mechanical properties of a silicone oil gel with a ‘latent’ gelator, 1-octadecylamine, and CO2 as an ‘activator’
Emiliano Carretti,Mathew George,Richard G. Weiss
Beilstein Journal of Organic Chemistry , 2010, DOI: 10.3762/bjoc.6.111
Abstract: A detailed study of the rheological properties of silicone oil gels, made from a low-molecular-mass organic gelator, a combination of 1-octadecylamine (a latent gelator) and carbon dioxide (an ‘activating’ molecule), is reported. Information gleaned from the mechanical measurements is used to characterize the gel networks and how they respond to temperature and strain. It is shown, for example, that very precise measurements of the gel-to-sol transitions can be obtained from plots of viscosity versus temperature.
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