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Mohan, V.

• In-vitro Studies on the Cultural Characteristics of Selected Ectomycorrhizal Fungi

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Authors

Ayswarya Radhakrishnan , V. Mohan

Source

Indian Forester, Vol 134, No 1 (2008), Pagination: 131-136

Abstract

The mycorrhizal symbiosis between plants and fungi is essential for the survival of both partners and it has been suggested that this symbiosis was a prerequisite for the successful colonization by the plants. Among the different mycorrhizal fungi, the ectomycorrhizal fungi are mostly associated with the tree crops particularly conifers and certain angiosperms. Unlike AM fungi, the ectomycorrhizal fungi can be pure cultured and mass produced in synthetic media under laboratory conditions. In the present study an attempt was made to identify the most suitable culture medium for the better growth of three different ectomycorrhizal fungal isolates viz., Pisolithus albus. It was found that all the three isolates performed well in MMN and PHA media. Another study was conducted wherein the three different ectomycorrhizal fungi viz., Laccaria fraterna, Scleroderma sp. and Pisolithus albus were grown in MMN media maintained at seven different pH levels. It was observed that the MMN liquid medium at moderate pH level (5.5 and 6.0) was found suitable for the better growth of all the fungi and significance of the findings is discussed.

Keywords

Ectomycorrhizal Fungi, In-vitro Studies, Culture Medium

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• Selection of Potential Isolates of Pisolithus albus on Growth Improvement of Eucalyptus tereticornis

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Authors

Ayswarya Radhakrishnan , Manoranjan Bhanja , V. Mohan , Srinivasa Sastry

Source

Indian Forester, Vol 134, No 6 (2008), Pagination: 814-820

Abstract

In the present investigation, 6 different isolates of P. albus collected from 6 different Eucalyptus plantations zones of Andhra Pradesh viz., Anantapur (isolate-1), Tirupati (isolate-2), Kavali (isolate-3), Paloncha (isolate-4), Tirumala (isolate-5) and Achutapuram (isolate-6) were applied to clonal plantlets of Eucalyptus tereticornis in order to determine the effect of each isolate on the growth improvement of the plants. In this study, the treatments with the fungus recorded significantly greater plant height, ischolar_main length, shoot and ischolar_main biomass and collar diameter over uninoculated (control) plantlets. The maximum growth of plants of Clone 2 was recorded in the treatment with Isolate-5. In Clone 1 better growth performances was observed when inoculated with Isolates 1, 3 and 5. Similarly, Isolates 1, 2 and 5 improved the growth parameters of Clone 3. Least growth was recorded in the plants treated with Isolates 4 and 6 but it had significantly better growth than the untreated control plants.

Keywords

Ectomycorrhizal Fungi, Pisolithus albus, Potential Isolates, Growth Improvement,Eucalyptus tereticornis, Clones

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• Study on the Status of Rhizobial Nodulation in Acacia auriculiformis and A. Mangium

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Authors

K. S. Tamil Selvi , V. Mohan , K. Udaiyan

Source

Indian Forester, Vol 134, No 11 (2008), Pagination: 1512-1520

Abstract

Acacia auriculiformis and Acacia mangium are the two Australian acacias that are used for plantation forestry in the tropics. These trees are associated with rhizobia in introduced area. The present study investigate the status of rhizobial nodulation in these two acacias planted under two different experimental trials of South India. The number of nodules in these species at two different sites ranged between 3 and 30 per gram rhizosphere soil. The influence of climatic and edaphic factors on the nodule status was also determined and discussed.

Keywords

Rhizobial Nodulation, Acacia auriculiformis, A. mangium

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• First Report of Plant Parasite Helicanthus elastica (Ders.) Dans. in Ailanthus Plantation in Tamil Nadu

Abstract Views :281  |  PDF Views:0

Authors

D. Rajasugunasekar , V. Mohan , C. Kunhikannan

Source

Indian Forester, Vol 133, No 9 (2007), Pagination: 1277-1278

Abstract

No abstract

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• Control of Leaf Rust of Terminalia chebula Caused by Uredo terminallae

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Authors

V. Mohan , P. Manokaran

Source

Indian Forester, Vol 131, No 1 (2005), Pagination: 115-117

Abstract

No abstract

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• Distribution of Arbuscular Mycorrhizal (AM) Fungi in Association with some Important Medicinal Plants of Tamil Nadu

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Authors

V. Mohan , M. Bappammal , N. Malathy , P. Manokaran

Source

Indian Forester, Vol 131, No 6 (2005), Pagination: 797-804

Abstract

The status of the Arbuscular Mycorrhizal (AM) fungi associated with the ischolar_mains of ten different medicinal plants viz., Aristolochia bracteata, Centella asiatica, Cichorium intybus, Eclipta prostrata, Hygrophylla auriculata, Indoneesiella echioides, Ocimum sanctum, Oxalis corniculata, Phyla nodiflora and Solanum trilobatum belonging to eight families such as Apiaceae, Aristolochiaceae, Solanaceae, Verbenaceae, Oxalidaceae, Labiatae, Acanthaceae and Asteraceae growing in the State Forest Department's medicinal garden at Aliyar, Tamil Nadu was investigated. The study revealed that all the plant species had AM colonization in the ischolar_mains and spore population in the rhizosphere soils. But there is a variation in per cent colonization in the ischolar_mains and soil spore population in different plant species. Among different plants studied, maximum percent ischolar_main colonization and soil spore population of AM fungi were observed in the plant samples of Ocimum sanctum and Centella asiatica. Low per cent colonization and soil spore population was observed in the plant samples of Cichorium intybus. Among different AM fungi isolated and identified, the most dominant was Glomus which had ten different species found in the rhizosphere of different medicinal plants studied.

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• alternaria Leaf Blight Disease on artocarpus Seedlings - a New Record

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Authors

Maheshwar Hegde , V. Mohan , P. Manokaran , K. Palanisamy

Source

Indian Forester, Vol 130, No 11 (2004), Pagination: 1339-1342

Abstract

No abstract

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• Antifeedant and Antifungal Compounds from Dirca palustris

Abstract Views :259  |  PDF Views:0

Authors

S. Murugesan , R. S. Ramsewak , W. J. Mattson , M. G. Nair , C. Narayanan , V. Mohan

Source

Indian Forester, Vol 129, No 3 (2003), Pagination: 364-370

Abstract

Wide range of insect pests and fungal pathogens attack seedlings, saplings and trees of economic important viz., Teak, Neem, Bamboo, Eucalyptus and Casuarina. The study highlights those solvent extracts of D. palustris (leather plant) responsible for antifeedant activity against Teak defoliator Hyblaea puera and skeletonizer Eutectona machaeralis. It was tested for fungal toxicity against some forest tree pathogens also.

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• Lasiodiplodia Collar-rot Disease on Casuarina junghuhniana Miq. - a New Record

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Authors

V. Mohan , C. Narayanan , P. Manokaran

Source

Indian Forester, Vol 128, No 9 (2002), Pagination: 1045-1046

Abstract

No abstract

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• Impact of Vam Inoculation on some Semi-Arid Tree Species

Abstract Views :249  |  PDF Views:0

Authors

K. K. Srivastava , V. Mohan , Neelam Verma

Source

Indian Forester, Vol 127, No 8 (2001), Pagination: 936-940

Abstract

Use of biofertilizer particularly VAM fungi has a great importance in forestry as it provides minerals, wide absorption area of ischolar_main zone, water uptake and tolerance to water stress conditions etc. Rajasthan covers about 61% of the geographical area of the total desert area of the country. In these harsh conditions, VAM fungi can play a significant role in survival of plants. In the present study some economically important tree species of Jaipur region namely Cordia myxa, Artocarpus integrifolia. Dalbergia sissoo, Pongamia pinnata, Mangifera indica and Alestronia sp. Were seleded for the study. VAM inoculated seedlings of above tree species performed better in term of shoot height, ischolar_main height, biomass and percentage of colonization. The shoot height inerease was maximum (32.2%) in A, integrifolia and minimum (11.2%) in Mangifera indica. The other parameters were also found better then uninoculateel plants.

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• Endomycorrhizal Interaction with Rhizosphere and Rhizoplane Mycoflora of forest Tree Species in Indian Arid Zone

Abstract Views :194  |  PDF Views:0

Authors

V. Mohan

Source

Indian Forester, Vol 126, No 7 (2000), Pagination: 749-755

Abstract

Microorganisms are present in great numbers on and near the feeder ischolar_mains of trees and they play vital roles in numerous physiological processes. These dynamic processes are medicated by associations of microorganisms participating in saprophytic, pathogenic and symbiotic ischolar_main activities. The major symbiotic association on tree species are mycorrhizal fungi. Among the mycorrhizal fungi, the Vesicular Arbuscular Mycorrhizal (VAM) fungi are ubiquitous and distributed in most ecosystems. These fungi act as biocontrol agent against ischolar_main and soil borne pathogens and improve plant growth and vigour. In the present investigation, an experiment was conducted to study the interaction of VAM fungi with rhizosphere and rhizoplane mycoflora of important arid zone species viz., Acacia nilotica, A. senegal, A. tortilis and Prosopis cineraria under laboratory conditions. The results revealed the fact that the mycoflora of rhizosphere and rhizoplane was found to be very le'ls in VAM inoculated plants as compared to uninoculated (control) plants of all the tree species studied. It was seen that most of the pathogenic fungi such as species of Cylindrocladium, Fusarium, F. oxysporum, Rhizoctonia bataticola and R. solani were suppressed or completely eliminated from V AM inoculated plant ischolar_mains and the rhizosphere soil samples. The significance of these findings is discussed.

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• Selection of Potential Isolates of Azospirillum for Growth Enhancement in Teak

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Authors

Ayswarya Radhakrishnan , V. Mohan

Source

Indian Forester, Vol 136, No 1 (2010), Pagination: 45-56

Abstract

Thirty two isolates of Azospirillum were isolated from the teak growing areas of Andhra Pradesh, Kerala and Tamil Nadu in South India. The isolates were identified, mass cultured and mixed with carrier material and inoculated to tissue culture raised plantlets of teak in nursery condition to test the efficacy of the isolates on the growth, biomass production and the overall quality of the plantlets. It was found that the isolates ACH-4 (Andhra Pradesh) and KNI-2 (Kerala) were the most potential ones for the growth improvement of the teak plantlets. An attempt was made to determine the synergistic effect between these 2 isolates and it was observed that application of both the isolates put together, not only enhanced the growth but also increased the biomass and the quality of the plantlets.

Keywords

Azospirillum brasilense, Azospirillum lipoferum, Spirillum lipoferum, Tectona grandis, Growth enhancement, South India

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• First Report of Plant Parasite Cuscuta chinensis Lam. On Acacia nilotica (l) Willd. Ex Del. Ssp. Indica (Benth) Brenan Seedlings in Forest Nursery

Abstract Views :217  |  PDF Views:0

Authors

J. Prasanth Jacob , V. Mohan , N. Lalitha , N. Srimurugan

Source

Indian Forester, Vol 132, No 7 (2006), Pagination: 903-905

Abstract

No abstract

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• Distribution of Ectomycorridzal Fungi in Forest Tree Species of Andhra Pradesh, Southern India - a New Record

Abstract Views :286  |  PDF Views:0

Authors

R. Vijaya Kumar , B. V. Prasada Reddy , V. Mohan

Source

Indian Forester, Vol 125, No 5 (1999), Pagination: 496-502

Abstract

Ectomycorrhizal fungi are commonly occurring in most of the conifers and a few angiosperms. In the present investigation, three different ectomycorrhizal fungi viz., Pisolithus tinctorius, Scleroderma sp. and Thelephora ramarioides were recorded in association with Acacia spp. And Eucalyptus spp. Plantations in low fertile soils of Andhra Pradesh. The frequency distribution of these fungi in association with different tree species was recorded. Root samples were processed for identification of these fungal associations. Significance of these findings is discussed.

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• Endomycorrhizal Associations of Acacias in Nurseries and Plantations of Indian Arid Zone

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Authors

V. Mohan , Y. P. Singh

Source

Indian Forester, Vol 123, No 4 (1997), Pagination: 323-330

Abstract

Most woody plants depend on mycorrhizal fungi for their survival. Among the different mycorrhizal fungi, Vesicular-Arbuscular Mycorrhizal (VAM) fungi are widely distributed in varied ecosystems including arid and semi-arid deserts and associated with many plant species. An intensive survey was conducted to study the status of VAM fungal associations in Acacia spp. viz., A.nilotica sub species indica and A.tortilis sub species raddiana of various forest nurseries and plantations in arid zone of Rajasthan. The extent of VAM colonization in ischolar_mains and spore populations in rhizosphere soils were quantified. Variation in per cent ischolar_main colonization and number of VAM propagules in the rhizoshpere of both nursery and plantation samples was observed. Also, mean number of VAM propagules and per cent ischolar_main colonization were greater in plantation samples than in nursery samples. Spores from the rhizosphere soils were isolated and tentatively identified as different species of Glomus, Gigaspora and Sclerocystis genera of endomycorrhizal fungi. Among these genera, Glomus is dominant in the rhizosphere of both the tree species screened. The most predominant VAM fungi were multiplied for future nursery inoculations.

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• Distribution of VAM Fungi in Nurseries and Plantations of Neem (Azadirachta indica) in Arid Zone of Rajasthan

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Authors

V. Mohan , Neelam Verma , Y. P. Singh

Source

Indian Forester, Vol 121, No 11 (1995), Pagination: 1069-1076

Abstract

Occurrence of VAM fungi is ubiquitous and are found in most ecosystems including arid- and semi-arid deserts. A survey for collection of ischolar_mains and rhizosphere soil samples of neem from various Forest Department nurseries and plantations in arid zone of Rajasthan revealed variation in per cent ischolar_main infection and number of VAM propagules in the rhizosphere soil samples. It has been observed that mean number of VAM fungal propagules and per cent ischolar_main infection were greater in plantation samples than in nursery samples. Different VAM fungi have been isolated, of which the genus Glomus is dominant with an exception of Sclerocystis in plantations. Among the Glomus spp., G. fasciculatum is the most predominant one in both nursery and plantation. The significance of these findings is discussed.

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• Distribution of Arbuscular Mycorrhizal (AM) Fungi in Koochi Hills, Western Ghats, Coimbatore District, Tamil Nadu

Abstract Views :338  |  PDF Views:0

Authors

N. Nagarajan , Uma Maheswari , V. Mohan , S. N. Suresh

Source

Indian Forester, Vol 137, No 3 (2011), Pagination: 322-332

Abstract

An attempt has been made to investigate the occurrence and distribution of arbuscular mycorrhizal (AM) fungi in association with the ischolar_mains and rhizosphere soils of 46 different plant species belonging to 25 families grown in Koochi Hills, Western Ghats, Coimbatore district, Tamil Nadu. It was found that all the samples had AM fungal colonization in the form of vesicular, arbuscular and hyphal structures in the ischolar_mains and spores from the rhizosphere soils but there was variation in per cent ischolar_main colonization and soil spore population. Total of 18 different AM fungi belonging to four genera viz., Acaulospora, Gigaspora, Glomus and Scutellospora were recorded from the rhizosphere of different plant species. Among them, the genus Glomus was found most dominant group of AM fungi. In this study, AM fungal association was reported for the first time in some of the plants of the families such as Araceae, Caryophyllaceae, Asteraceae, Chenopodiaceae, Elaeginaceae, Euphorbiaceae, Poaceae, Nyctaginaceae, Oleaceae, Onagraceae, Polygonaceae, and Portulacaceae, which were reported to be non-mycorrhizal.

Keywords

Arbuscular mycorrhizal Fungi, Western Ghats, Symbiotic Relationship, Soil Spore
Population

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• Diversity of Arbuscular Mycorrhizal Fungi Associated with Medicinally Important and Natural Dye Yielding Plant (Indigofera tinctoria, L.) from Kanyakumari District, Tamil Nadu

Abstract Views :402  |  PDF Views:0

Authors

S. K. Sundar , A. Palavesam , V. Mohan , B. Parthipan

Source

Indian Forester, Vol 137, No 7 (2011), Pagination: 822-833

Abstract

In the present study, an attempt was made to investigate the status of AM fungal association and the physico-chemical properties of the rhizosphere soil of an important medicinal plant,Indigofera tinctoria from three different localities of Kanyakumari District, Tamil Nadu. The physico-chemical analysis showed that the soil was slightly acidic to neutral pH. The nutrient status was found to be low to moderate in nature. The diversity of AM fungal species was also investigated and it was observed that the plant was positive for AM association and has distinct pattern of AM fungal diversity with 15 different AM fungal species of four genera in the three sites studied. Among them, the genus Glomus was the dominant one. Trap culture study was conducted to isolate AM fungal spores which showed presence of two additional AM fungal species. The species richness, diversity indices, colonization percentage and spore numbers of AM fungi were higher in Vell hills region followed by other two sites.

Keywords

Arbuscular Mycorrhizal Fungi, Glomus, Indigofera tinctoria, Diversity Index, Dyeyielding Plant

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• Seasonal Diversity Status of Plant Growth Promoting Rhizobacteria (PGPR) in Rhizosphere of Fast Growing Native Tree Species, Melia dubia in Tamil Nadu

Abstract Views :152  |  PDF Views:0

Authors

Sangeetha Menon ¹, V. Mohan ¹

Affiliations
1 Forest Protection Division, Institute of Forest Genetics and Tree Breeding, Coimbatore - 641 002, Tamil Nadu, IN

Source

Indian Forester, Vol 141, No 1 (2015), Pagination: 99-104

Abstract

A study was conducted to determine the seasonal diversity status of different beneficial bacteria viz., Plant growth promoting rhizobacteria (PGPR) from the rhizosphere of M. dubia plantations of Tamil Nadu. Total of 28 PGPR isolates (Azotobacter - 8 isolates; Azospirillum - 9 isolates; PSB - 11 isolates) were recorded from various samples collected from different study locations and identified as members of two species each of Azotobacter and Azospirillum and five species of PSB. Among PSB, four Bacillus species and one Stenotrophomonas species were observed. Clear seasonal pattern was seem on the occurrence and distribution of population density of PGPRs. Population density of Azotobacter was found maximum during April-June (2011), whereas population density of Azospirillum and PSB was found maximum during Oct-Dec (2011). The climatic and edaphic factors influenced the population density of PGPR colonization, but the intensity of their influence varies with the study sites. Soil in all the sites was found acidic, low in available nitrogen, moderate in available phosphorus and high in available potassium. Studies on growth hormone (IAA) production and phosphate solubilization by PGPR isolates further revealed the potentiality of these isolates to be optimized and produced on a large scale as bio-fertilizers for growth enhancement of important native tree species.

Keywords

Diversity, Plant Growth, Melia Dubia, Tamil Nadu.

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• Biochemical and Hormonal Profiles in Selected Normal, Untreated and Treated Type-2 (Non-Insulin Dependent) Diabetic Men and Menopausal Women

Abstract Views :172  |  PDF Views:0

Authors

M. Vasanthi ¹, P. Supriya ¹, R. Priya ¹, P. C. J. Peter ¹, V. Mohan ², Balasubramanian ¹

Affiliations
1 Department of Endocrinology, Dr. ALM Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai-600 113, IN
2 MV Diabetes Specialties Centre (P) Ltd., Chennai-600 086, IN

Source

Journal of Endocrinology and Reproduction, Vol 7, No 1&2 (2003), Pagination: 70-70

Abstract

This study was designed to understand the biochemical and hormonal changes associated with type-2 diabetes in South Indian men and menopausal women. Three groups of subjects were recruited for the study viz., age-matched normal (control), untreated and treated type-2 diabetic men and menopausal women. Untreated type-2 diabetic men had low levels of serum testosterone with unalteredestradiol and elevated insulin and Cortisol. Oral hypoglycemic agents did not influence serum insulin level but decreased the Cortisol with no change in testosterone and estradiol levels. Among biochemical parameters, blood glucose, glycosylated hemoglobin, triglycerides and creatinine were higher in both treated and untreated type-2 diabetic men. The levels of the HDL and LDL did not reflect any significant change.

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• Assemblages of Macrobenthic Insect Larvae of the Sankosh River Basin in the Areas Boardering India and Bhutan

Abstract Views :211  |  PDF Views:0

Authors

Anish V. Pachu ¹, C. Kunhikannan ², V. Mohan ², Sudhir Kumar ³, N. Rama Rao ¹

Affiliations
1 Institute of Forest Biodiversity, Hyderbabd-500 100 (Andhra Pradesh), IN
2 Institute of Forest Genetics and Tree Breeding, Coimbatore-641 002, IN
3 Indian Council of Forestry Research and Education, Dehradun-248 006, IN

Source

Indian Forester, Vol 142, No 5 (2016), Pagination: 493-501

Abstract

A preliminary investigation on macrobenthic insect larvae of the Sankosh River and its permanent headwater streams carried out during the period from 2009 to 2010 has revealed significant results on the assemblages of various ecologically sensitive insect taxa. Beatidae, Simuliidae, Hydropsychidae, Chironomidae and Heptageniidae were the dominant taxa among the total of 37 insect families and Ephemeroptera, Diptera and Trichoptera were the dominant taxa among the total of 9 insect orders. Order Trichoptera was the richly represented taxa with 9 insect families followed by Diptera with 6 families and Hemiptera and Odonata with 5 families each. The abundance (%) of Ephemeroptera, Plecoptera and Trichoptera (EPT) taxa which account for 60.70% than that of all the other taxa was highly significant. A fairly good Biological Monitoring Working Party (BMWP) Score with an average of 50.31 out of the total 1308 was obtained for the 26 sampling stations, indicating relatively good water quality of the river system. The study, therefore, revealed the importance of aquatic macrobenthic insect diversity and its monitoring for better management of the river ecosystem.

Keywords

Sankosh River, Benthic, Macro-Invertebrates, Insects, Biomonitoring.

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• A Random PWM Scheme Based on Coalescing the Pseudorandom Triangular Carrier and the Randomized Pulse Position for Voltage Source Inverters

Abstract Views :192  |  PDF Views:2

Authors

V. Mohan ¹, J. Raja ², S. Jeevananthan ³

Affiliations
1 E.G.S. Pillay Engineering College, Nagapattinam, IN
2 Anna University of Technology, Tiruchirappalli, IN
3 Pondicherry Engineering College, Pondicherry, IN

Source

Programmable Device Circuits and Systems, Vol 4, No 11 (2012), Pagination: 570-574

Abstract

A novel hybrid pseudo randomized triangular carrier and randomized pulse position scheme for voltage source inverter is proposed in this paper in order to disperse the acoustic switching noise spectra of an induction motor drive. The proposed random pulse width modulation (RPWM) pulses are produced through the logical comparison of a pseudorandom binary sequence (PRBS) bits with two random triangular carriers. Here, the PWM pulses of the proposed scheme possess the hybrid characteristic of the random pulse position PWM and the random carrier frequency PWM. The proposed technique is evaluated using MATLAB/Simulink and the results prove an excellent harmonic spectra spreading capability of the proposed hybrid scheme as compared with conventional schemes.

Keywords

Hybrid RPWM, Pseudorandom Carrier Modulation Method, Pseudo Random Binary Sequence (PRBS), RPWM, Voltage Source Inverter.

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• Constraint-Based Multidimensional Frequent Sequential Pattern in Web Usage Mining

Abstract Views :174  |  PDF Views:2

Authors

S. Vijayalakshmi ¹, V. Mohan ², S. Suresh Raja ³

Affiliations
1 Department of Computer Applications, Thiagarajar College of Engineering, Madurai, Tamil Nadu, IN
2 Department of Mathematics, Thiagarajar College of Engineering, Madurai, Tamil Nadu, IN
3 Department of Computer Applications, K.L.N College of Engineering, Madurai, Tamil Nadu, IN

Source

Data Mining and Knowledge Engineering, Vol 1, No 4 (2009), Pagination: 155-161

Abstract

Sequential Pattern Mining is one of the important approaches, which extracts frequent subsequences as pattern in a Sequence Database. Basic formulation of the frequent sequential pattern discovery problem assumes that the only constraint to be satisfied by discovered patterns is the minimum support threshold. Data mining systems should be able to exploit such constraints to speed-up the mining process. Though much work has been done in this area on one and two-dimensional database, mining sequential patterns from multidimensional database is yet on progress. In this paper we introduce an efficient strategy for discovering Web usage mining is the application of data mining techniques to discover usage patterns from Web data, in order to understand and better serve the needs of Web-based applications. Web usage mining consists of three phases, namely preprocessing, pattern discovery, and pattern analysis. This paper describes each of these phases in detail. 
The main objective of multidimensional sequential pattern mining is to provide the end user with more useful and interesting patterns. To mine such kind of sequence data, we have used an extended version of the prefixspan (EXT-Prefixspan) algorithm to extract the Constraint-based multidimensional frequent sequential patterns in web usage mining. A web access pattern is a sequential pattern that is pursued frequently by users. Using these sequences as prefixes a projected database is constructed which is then recursively mined to find the frequent sequential patterns. The EXT-Prefixspan mines the complete set of patterns but greatly reduces the efforts of candidate subsequence generation. Moreover, prefix –projection substantially reduces the size of projected database and leads to efficient processing. We show that the EXT-Prefixspan algorithm is more flexible at capturing desired knowledge than previous Algorithm.

Keywords

Data Mining, Frequent Pattern Mining, Sequence Pattern Mining, Web Usage Mining.

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• A Smart Approach to Condition Monitoring, Parameter Estimation and Execution of WECS Using PLC and SCADA Techniques

Abstract Views :211  |  PDF Views:1

Authors

G. Ganesan ¹, N. P. Subramanianan ², V. Mohan ¹, R. Anandaraj ¹

Affiliations
1 E.G.S.Pillay Engg. College, Nagapattinam, IN
2 Pondicherry Engineering College, Puducherry, IN

Source

Automation and Autonomous Systems, Vol 5, No 4 (2013), Pagination: 170-174

Abstract

This paper presents a parameter estimation of Wind Energy Conversion System (WECS) with turbine gearbox, which is an important mechanical component of wind turbine and the function is to pass the power which is generated by the wind wheel in the wind to the generator. The speed of wind wheel is usually very low, well short of the required generator speed, for this reason, its function must rely on the speed-raising effect by wind turbine, thus, it will also be called speed increasing gearbox. It is also one of the most important and most expensive components of wind turbine. Once installed, it is difficult to repair. Therefore, it needs effective experiments during its design and production to meet the strict quality requirements. The test platform adopts closure design, which enables it to experiment two gearbox products at the same time. The running condition and operating parameters in real time is proposed and executed through Programmable Logic Circuit (PLC) and SCADA technique. An estimated efficiency of 80% is constantly maintained by this scheme. It can also intelligently control each system of the entire test platform, which including lubrication system, loading system, frequency converter, motor and other equipment.

Keywords

Wind Energy Conversion System (WECS), Condition Monitoring Systems (CMS), Programmable Logic Circuit (PLC), Supervisory Control and Data Acquisition (SCADA).

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• Current Concepts in Diet and Diabetes

Abstract Views :188  |  PDF Views:0

Authors

Saroja Raghavan ¹, V. Mohan ¹

Affiliations
1 Madras Diabetes Research Foundation Gopalapuram, Chennai, IN

Source

The Indian Journal of Nutrition and Dietetics, Vol 36, No 4 (1999), Pagination: 193-197

Abstract

Importance of diet in diabetes can be traced back to the days of the ancient ayurvedic physican Sushruta. He attributed the consumption of whole-some foods, besides hereditary factors for the development of diabetes. The ideal diet for diabetes remains to be determined even after decades of experience in the management of diabetes. The dietary recommendations seem to vary from time to time along with the social changes.

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• Effect of Different Plant Growth Promoting Microbes as Bio-Inoculants on the Growth Improvement of Ailanthus excelsa Seedlings in Nursery

Abstract Views :209  |  PDF Views:0

Authors

S. S. Sreedhar ¹, V. Mohan ²

Affiliations
1 Wildlife Management Circle, Eluru, Andhra Pradesh, IN
2 Division of Forest Protection, Institute of Forest Genetics and Tree Breeding, Coimbatore, IN

Source

Indian Forester, Vol 142, No 7 (2016), Pagination: 631-641

Abstract

In the present study, an attempt was made to determine the effect of commercially available beneficial microbes as bioinoculants on growth enhancement of economically important fast growing indigenous tree species, Ailanthus excelsa in nursery. It was observed that dual application of bio-inoculants was found to be better than single inoculations indicating the synergistic effect. Further, dual combinations involving both Nitrogen fixer and Phosphorus solubilizer/mobilizer were found to be highly effective.

Keywords

AM Fungi, Azospirillum, Azotobacter, Phosphobacterium, Ailanthus Excels.

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References

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• Effect of Carbon Sources on the Growth of Ectomycorrhizal Fungi

Abstract Views :158  |  PDF Views:0

Authors

S. Hemalatha ¹, V. Mohan ², K. Sujatha ³

Affiliations
1 Department of Biotechnology, Vels University, Chennai-117, IN
2 Forest Protection Division, Institute of Forest Genetics and Tree Breeding, Coimbatore, IN
3 Department of Zoology, Government Arts College, Coimbatore, IN

Source

Research Journal of Science and Technology, Vol 3, No 1 (2011), Pagination: 44-48

Abstract

The ectomycorrhizal fungi show higher tolerance to high soil temperatures, various soil and ischolar_main borne pathogens and heavy metal toxicity. Hence an attempt has been made to investigate the growth characteristics of different ectomycorrhizal fungi on different carbon sources. The effect of different carbon sources viz., lactose, maltose, mannitol, and sucrose on the growth of Scleroderma citrinum, Suillus brevipes on day 30 and 45 were carried out. Scleroderma citrinum showed maximum growth on sucrose and lactose whereas Suillus brevipes showed maximum growth in lactose and mannitol in all the day intervals (30^th and 45^th days). On day 30 and 45 change in pH in the culture filtrate of Scleroderma citrinum and Suillus brevipes were also determined. The study revealed about the suitable carbon source for the mass cultivation of the selected ectomycorrhizal fungi.

Keywords

Scleroderma citrinum, Suillus brevipes, Biomass, Carbon Source.

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• A Novel Programmed Low Frequency PWM Method for Performance Enhancement of Single-Phase to Single-Phase Cycloconverter

Abstract Views :173  |  PDF Views:3

Authors

G. Chitrakala ¹, N. Stalin ², V. Mohan ³

Affiliations
1 Department of Electrical and Electronics Engineering, E.G.S. Pillay Engineering College, Nagapattinam, IN
2 Department of Petrochemical Technology, Anna University, BIT Campus, Tiruchirappalli, IN
3 Department of Electrical and Electronics Engineering, E.G.S. Pillay Engineering College, Nagapattinam, IN

Source

Digital Image Processing, Vol 9, No 2 (2017), Pagination: 39-46

Abstract

This paper presents a novel control strategy for Slow Switching Frequency Changer (SSFC). The proposed Area Equalization Method (AEM) offers reduced Total Harmonic Distortion (THD) for the required output voltage magnitude.The detailed comparison of the fundamental component and harmonic content of the output voltage of the AEM with the results obtained from the existing cycloconverter control strategies are also presented. Results of the simulation have been validated with the experimentation and superiority of the proposed scheme is conformed.

Keywords

Slow Switching Frequency Changer, THD, Cycloconverter, Area Equalization Method.

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• Preface

Abstract Views :259  |  PDF Views:79

Authors

M. Balasubramanyam ¹, V. Mohan ¹

Affiliations
1 Madras Diabetes Research Foundation, Chennai, IN

Source

Current Science, Vol 113, No 07 (2017), Pagination: 1264-1266

Abstract

Tackling diabetes with a trans-disciplinary integrated scientific approach

In a world characterized by rapid change, uncertainty and increasing interconnectedness, there is a growing need for science to contribute to the solution of persistent, complex systems. As the disease pathogenesis of diabetes is heterogeneous and highly complex, both its prevention as well as management require solutions from transdisciplinary fields.

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• Genetic Basis of Monogenic Diabetes

Abstract Views :263  |  PDF Views:83

Authors

V. Radha ¹, V. Mohan ¹

Affiliations
1 Department of Molecular Genetics, Madras Diabetes Research Foundation, #20, Golden Jubilee Biotech Park for Women Society, SIPCOT, Siruseri, Chennai 603 103, IN

Source

Current Science, Vol 113, No 07 (2017), Pagination: 1277-1286

Abstract

Advances in the understanding of monogenic causes of diabetes and the discovery of single-gene mutations responsible for different phenotypes have greatly increased our knowledge of β-cell physiology. Such advances have had implications for the individual patient diagnosed with the specific monogenic cause of diabetes, especially in maturity onset diabetes of the young (MODY) and neonatal diabetes mellitus (NDM). Genetic diagnosis of MODY is also likely to have important prognostic and therapeutic implications in majority of the patients with confirmed HNF1A and HNF4A mutations. Genetic screening and analyses have helped several neonatal infants carrying mutations in the KCNJ11 and ABCC8 genes to shift from insulin treatment to oral sulphonylurea drugs. The progress in genomics of monogenic diabetic forms has helped in translating the discoveries from bench to bedside in clinical care. Therefore, there is an urgent need to incorporate genetic testing for the genes implicated in monogenic diabetes like MODY and NDM in the diabetes clinics. Discoveries in genetic research methodology and understanding of genetic etiology will have great translational implications for disease treatment and follow-up.

Keywords

Genetic Screening, Maturity Onset Diabetes of the Young, Monogenic Diabetes, Neonatal Diabetes, Precision Medicine.

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• Improving Attainment of Graduate Attributes using Google Classroom

Abstract Views :156  |  PDF Views:3

Authors

B. K. Madhavi ¹, V. Mohan ¹, Divya Nalla ¹

Affiliations
1 Department of Computer Science and Engineering, Nalla Malla Reddy Engineering College, Hyderabad, IN

Source

Journal of Engineering Education Transformations, Vol 31, No 3 (2018), Pagination: 200-205

Abstract

Outcome Based Education (OBE) has become world wide standard in the current education system. OBE provides a clear and unambiguous framework for curriculum planning. It stresses on the end product- what graduate can do after completing course rather than on the educational process. Graduate Attributes can be defined as qualities, attitudes and dispositions that graduates should possess in full or part,when they have completed their course of study. OBE is measured by assessing the attainment of Graduate Attributes. This paper presents a case study of a course using Google Classroom and compared with two other courses being taught that do not use Google Classroom in terms of attainment of Graduate Attributes.

Keywords

Outcome Based Education, Graduate Attributes, Google Classroom.

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• Public Health Scenario of Diabetes in India — Addressing the Challenges

Abstract Views :220  |  PDF Views:0

Authors

V. Mohan ¹

Affiliations
1 Dr. Mohan’s Diabetes Specialities Centre & Madras Diabetes Research Foundation, Chennai, IN

Source

The Indian Practitioner, Vol 71, No 11 (2018), Pagination: 7-10

Abstract

During the last two decades, non-communicable diseases (NCDs) have overtaken communicable diseases (CDs) as the major cause of morbidity and mortality in India. The Global Burden of Disease (GBD) Study India, showed that in the 1990s more than 50% of all deaths (and in some states upto 70%) were due to communicable diseases. This situation has completely changed, and now, in all the 31 states of India, non- communicable diseases form the major cause of death, ranging from 55–70% of all deaths in India⁽¹⁾. Among NCDs, the most rapid rise is seen in diabetes which is now reaching epidemic proportions in India⁽²⁾. In the 1970s the prevalence of diabetes in urban areas of India was about 2% and in rural areas between 0.5 to 1%. Over the last 40 years, this has dramatically increased almost 10 fold^(3,4). In metropolitan cities like Chennai and Delhi, the prevalence of diabetes is around 25% in those above 20 years of age. At age 55 and above almost 40% of the population has diabetes and another 35% have pre-diabetes which means that 75% of the population aged 55 years and above, in the metropolitan cities, have some form of dysglycemia⁽⁵⁾.

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• Practical Diabetes Care for Healthcare Professionals, Second Edition

Abstract Views :170  |  PDF Views:77

Authors

V. Mohan ¹

Affiliations
1 Dr Mohan’s Diabetes Specialities Centre, No. 6, Conran Smith Road, Gopalapuram, Chennai 600 086, IN

Source

Current Science, Vol 121, No 11 (2021), Pagination: 1496-1496

Abstract

No Abstract.

Keywords

No Keywords.

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