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Understanding Differential Responses of Grapevine (Vitis vinifera L.) Leaf and Fruit to Water Stress and Recovery Following Re-Watering  [PDF]
Bhaskar Bondada, Janani Shutthanandan
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.39149
Abstract: Among all fruit crops of horticultural importance, grapevines (Vitis vinifera L.) stand out as the most drought tolerant crop species whose tolerance is credited to their proficiency to recover from water stress in both the natural and vineyard growing conditions. However, information on the recovery responses is relatively scant. Studies were conducted to address this issue using potted vines of the grapevine cultivar, Cabernet Sauvignon, which was subjected to water stress and along with anatomical and ultrastructural characterizations, physiological status was assessed in healthy and water stressed vines, and following recovery via rewatering from the water stressed vines. Water stress induced wilting of leaves, drooping of tendrils, and desiccation followed by abscission of shoot tip leaving behind a brown scar at the shoot apex. The wilted leaves accumulated ABA, which correspondingly reduced stomatal conductance and leaf water potential. Upon re-watering, both these parameters made a recovery with values similar to healthy leaves. Likewise, leaf anatomical features following rewatering resembled to that of healthy leaves. In clusters, water stress caused shriveling of preveraison (unripened) berries, which regained full turgor following water resupply, whereas the postveraison (ripening) berries in the same cluster remained unaffected as evidenced by the presence of viable mesocarp cells and epicuticular wax in the form of platelets. The study revealed that shoot tip with leaf primordia was most sensitive to water stress followed by fully expanded leaves and preveraison berries, whereas the postveraison berries remained unaffected. This information could be valuable to implementing irrigation strategies towards sustaining grape production in existing vineyards experiencing episodic droughts and targeted areas prone to drought.
Antibacterial activity of plants used in Indian herbal medicine
Pavithra P,Janani V,Charumathi K,Indumathy R
International Journal of Green Pharmacy , 2010,
Abstract: Delonix elata , Enicostemma axillare, Merremia tridentata, Mollugo cerviana and Solanum incanum are medicinal plants used in traditional Indian medicine for the treatment of various ailments. These plants were selected to evaluate their potential antibacterial activity. To determine antibacterial activity and phytochemicals in the crude extracts of five medicinal plants used in traditional Indian medicine for the treatment of various ailments like rheumatism, piles fever, skin diseases and snake bite. The antibacterial activity of organic solvent extracts of these plants were determined by disc diffusion and broth dilution techniques against gram-positive bacterial strains (Bacillus subtilis, Staphylococcus aureus) and gram-negative bacterial strains (Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa). Results revealed that the chloroform and methanol extracts of D. elata and methanol extracts of M. cerviana exhibited significant antibacterial activity against gram-positive and gram-negative strains with minimum bactericidal concentration (MBC) ranging from 1.5 to 100 mg/ml. Methanol extracts of M. tridentata exhibited activity only against gram-positive bacterial strains with MBC ranging from 12.5 to 100 mg/ml. Extracts of E. axillare and S. incanum showed activity only against B. subtilis and were not bactericidal at 100 mg/ml. The most susceptible organism to the organic extracts from all the studied plants was B. subtilis and the most resistant organism was P. aeruginosa. The presence of phytochemicals such as alkaloids, tannins, triterpenoids, steroids and glycosides in the extracts of these plants supports their traditional uses as medicinal plants for the treatment of various ailments. The present study reveals potential use of these plants for developing new antibacterial compounds against pathogenic microorganisms.
Review of paraneoplastic syndromes associated with oropharyngeal squamous cell carcinoma
Mathew Deepu,Rooban T,Janani V,Joshua E
Journal of Oral and Maxillofacial Pathology , 2010,
Abstract: Malignancies are usually preceded by the presence of various paraneoplastic syndromes (PNS), which could be the indirect and/or remote effects of the metabolites produced by neoplastic cells. PNS manifested by oropharyngeal squamous cell carcinomas, which is the most common head and neck malignancy, are highlighted in this review. Knowledge of the clinical spectrum of these syndromes will equip the oral physician for early diagnosis and management of these hidden malignancies, especially of the pharyngeal region.
Multi-document Summarization for Query Answering E-learning System
Dr.S.Saraswathi,,S.Janani,M.Hemamalini,V.Priyadharshini
International Journal on Computer Science and Engineering , 2011,
Abstract: The proposed E-learning system aims at providing a multi-document summarization for documents retrieved from Google and providing the user a precise answer for his/her query under the domain of“Operating Systems”. This E-learning system also provides documents display for various topics, authentication facility for it to be used by certain users. Authenticity of users is maintained by SymmetricEncryption key Algorithm. The system is designed in a manner that the query entered by the user is passed to the tree tagger to obtain the keywords which are then passed to Google to retrieve multiple documents. Multiple levels of summarization are performed on the documents to retrieve exact answer for the user. Document ranking is performed by using tf*idf weights followed by Individual documentsummarization using keywords and concept words. The similarity of documents is then compared to produce a non-redundant output. Finally the resultant data is submitted to the user.
Effect of Heavy metal stress on spore germination of Pteris confusa T. G. Walker and Pteris argyraea T. Moore
Irudayaraj V.,Johnson M.,Priyakumari A.S.,Janani Prabha A.
Journal of Stress Physiology & Biochemistry , 2011,
Abstract: Background: Plants have both constitutive and adaptive mechanisms for coping with the elevated metal concentrations and they are utilized to clean the polluted soil and water. Unlike angiosperms hyperaccumulators, fern hyperaccumulators are equipped with inherent biological characteristics that could be exploited in the phytoremediation strategies aimed at decontaminating polluted sites. Fern spores can be successfully used to screen the hyperaccumualting ferns and also to test the toxicity of the metal contaminated samples. Purpose of the Study: In the present study, a preliminary attempt was made to compare the tolerance capacity of the spores of two ferns; Pteris confusa T. G. Walker and Pteris argyraea T. Moore against the heavy metal zinc (Zinc sulphate). Spores of the two ferns were cultured in Knop’s liquid medium with various concentrations of zinc sulphate (0-200ppm). Results: In the case of P. confusa normal germination was observed in control, 120 ppm and 140 ppm and the germination of spores were failed in 160, 180 and 200 ppm of zinc supplemented cultures. In contrary, P. argyraea showed maximum percentage of spore germination in 140 ppm zinc supplemented cultures and the control and 120 ppm zinc sulphate supplemented cultures were failed to show the germination. The germination percentage and growth rate was decreased in high concentration of zinc sulphate. Rhizoids are showed more tolerance to heavy metal than protonema of P. argyraea. Conclusion: Difference in response of spores to the heavy metal zinc may be due the difference in the hyper-accumulating capacity of the ferns.
Computational screening of inhibitors for HIV-1 integrase using a receptor based pharmacophore model
Janani Jaganatharaja,Ragul Gowthaman
Bioinformation , 2006,
Abstract: The HIV (human immuno-deficiency virus) integrase has a crucial role in viral replication. Moreover, it has no cellular homologue in humans. Hence, it is considered as an attractive drug target. Many inhibitors against the integrase protein has been designed and discussed. The Y-3 inhibitor (4-acetyl amino-5-hydroxy naphthalene - 2, 7- disulfonic acid) is already known to inhibit HIV-1 integrase. However, it is not suitable as a drug like candidate due to its high cyto-toxicity. In this report, a pharmacophore model for HIV integrase is described using the already known Y-3 inhibitor binding site. Fourteen compounds chemically related to the Y-3 inhibitor were generated using the described pharmacophore model and reported. Subsequent computational analysis showed that these compounds have interactions with the Y3 binding site and their possible utility as an integrase inhibitor is discussed.
Meromorphic Parabolic Starlike Functions Associated with -Hypergeometric Series
G. Murugusundaramoorthy,T. Janani
ISRN Mathematical Analysis , 2014, DOI: 10.1155/2014/923607
Abstract: We introduce a new class of meromorphic parabolic starlike functions with a fixed point defined in the punctured unit disk involving the -hypergeometric functions. We obtained coefficient inequalities, growth and distortion inequalities, and closure results for functions . We further established some results concerning convolution and the partial sums. 1. Introduction Let be a fixed point in the unit disc . Denote by the class of functions which are regular and Also denote by , the subclass of consisting of the functions of the form which are analytic in . Note that is subclasses of consisting of univalent functions in . By and , respectively, we mean the classes of analytic functions that satisfy the analytic conditions , and , for introduced and studied by Kanas and Ronning [1]. The class is defined by geometric property that the image of any circular arc centered at is starlike with respect to and the corresponding class is defined by the property that the image of any circular arc centered at is convex. We observe that the definitions are somewhat similar to the ones introduced by Goodman in [2, 3] for uniformly starlike and convex functions, except that in this case the point is fixed. In particular, and , respectively, are the well-known standard classes of convex and starlike functions. Let denote the class of meromorphic functions of the form defined on the punctured unit disk . Denote by the subclass of consisting of the functions of the form A function of the form (4) is in the class of meromorphic starlike of order ( ) denoted by , if and is in the class of meromorphic convex of order ( ) denoted by , if For functions given by (4) and ,?? we define the Hadamard product or convolution of and by More recently, Purohit and Raina [4] introduced a generalized -Taylor’s formula in fractional -calculus and derived certain -generating functions for -hypergeometric functions. In this work we proceed to derive a generalized differential operator on meromorphic functions in involving these functions and discuss some of their properties. For complex parameters and ? the -hypergeometric function is defined by with where when . The -shifted factorial is defined for as a product of factors by and in terms of basic analogue of the gamma function It is of interest to note that is the familiar Pochhammer symbol and Now for , , and , the basic hypergeometric function defined in (8) takes the form which converges absolutely in the open unit disk . Corresponding to the function recently for meromorphic functions consisting functions of the form (3), Huda and
Type IV Aggressive and Symptomatic Vertebral Hemangioma  [PDF]
Kawtar Nassar, Wafae Rachidi, Saadia Janani, Ouafa Mkinsi
Open Journal of Rheumatology and Autoimmune Diseases (OJRA) , 2015, DOI: 10.4236/ojra.2015.53014
Abstract: Vertebral hemangiomas (VHs) are benign tumours with rich vasculature. They are the most common tumours of the spine with an estimated incidence of 10% - 12% of the population. Despite its high incidence, they are often asymptomatic and only 0.9% - 1.2% are symptomatic. They may also be aggressive and are characterised by bone expansion, extra osseous extension of the tumour, disturbance of local blood flow and, in rare cases, compression fractures. We report a 59-year-old woman, presented with back pain after falling from standing height. Magnetic resonance imaging revealed lumbar spine vertebral fractures and T12 osteolytic lesion with spinal canal extension, concurring to VH type IV, according to Tomita’s surgical classification of spinal. Embolization, posterior decompression and fixation were performed followed by postoperative radiotherapy. Her symptoms were resolved immediately without recurrence after 6 mouths.
Disgust Emotion and Obsessive-Compulsive Symptoms in an Iranian Clinical Sample  [PDF]
Giti Shams, Leyla Janani, Irena Milosevic, Elham Foroughi
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.613168
Abstract: A growing body of research has revealed robust associations between disgust and obsessive-compulsive disorder (OCD) symptoms. The present study aimed to understand if particular disgust domains are more closely associated with OC symptoms subscales, especially contamination and washing. A sample of 60 OCD patients from an outpatient Iranian psychiatric clinic completed self-report questionnaires including the Disgust Scale-Revised (DS-R), the Obsessive-Compulsive Inventory-Revised (OCI-R) and the Padua inventory-Washington State University revision (PI- WSUR). The results indicated correlations between the total, core and contamination subscales of the DS-R together with the OCI-R total score as well as with the PI-WSUR total score. However, no correlation was found between these inventories and the DS-R animal reminder subscale. The DS-R total score also correlated with the washing and checking subscales of the OCI-R and with the contamination obsessions and washing and checking compulsions of the PI-WSUR. The relationship between disgust and demographic characteristics showed that the DS-R total, core and contamination scores were significantly higher for women and married subjects, and that the animal reminder subscale score was significantly higher for women than men. Although symptoms presentation, risk factors, and outcomes may vary cross-culturally, very little is known about disgust emotion as an OCD symptom in Iranian and eastern cultures. Additional work is needed to better understand these symptoms in other eastern cultures.
Digital implementation of PFC half bridge converter fed PMBLDC motor using microcontroller
C. Umayal,B. Janani,S. Rama Reddy
Journal of Engineering and Applied Sciences , 2012,
Abstract: Digital Simulation and implementation of a Power Factor Correction (PFC) half bridge converter based adjustable speed voltage controlled VSI fed PMBLDC motor is presented in this paper. A single-phase AC-DC converter topology based on the half bridge converter is employed for PFC which ensures near unity power factor over wide speed range. The proposed speed control scheme has the concept of DC link voltage control proportional to the desired speed of the PMBLDC motor. The PFC converter based PMBLDCM drive is designed, modeled and simulated using MATLAB-SimuLink environment. This drive ensures high accuracy and robust operation from near zero to high speed. Simulation and experimental results of these systems are presented and the performance measures are compared. The simulation and experimental results with bridgeless boost converter show that there is an improvement in power factor.
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