LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 42

Search options

  1. Article ; Online: Forecasting Wind Energy Production Using Machine Learning Techniques

    Margarat G. Simi / Kumar C. Siva / Rajan Surulivel / B. Raj Mohan

    E3S Web of Conferences, Vol 387, p

    2023  Volume 01007

    Abstract: Wind energy is an essential source of renewable energy that has gained popularity in recent years. Accurately forecasting wind energy production is crucial for efficient energy management and distribution. This paper proposes a machine learning-based ... ...

    Abstract Wind energy is an essential source of renewable energy that has gained popularity in recent years. Accurately forecasting wind energy production is crucial for efficient energy management and distribution. This paper proposes a machine learning-based approach using Support Vector Regression (SVR) and Random Forest Regression (RFR) to forecast wind energy production. The proposed methodology involves data collection, preprocessing, feature selection, model training, optimization, and evaluation. The performance of the models is assessed using mean squared error (MSE), root mean squared error (RMSE), and coefficient of determination (R-squared) metrics. The results indicate that the proposed SVR-RFR model outperforms individual models, achieving a higher accuracy in forecasting wind energy production.
    Keywords wind energy production ; machine learning ; support vector regression ; random forest regression ; forecasting ; Environmental sciences ; GE1-350
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  2. Article: Efficacy of Bovine Hydroxyapatite and Collagen Along With Platelet-Rich Fibrin as a Scaffold and Human Chorion as a Membrane for Ridge Preservation: A Case-Control Study.

    B, Tanuja / Kondareddy, Krishna Mohan / A, Ramesh / N, Rajesh / E, Siva Rami Reddy / Prakash, Ravi

    Cureus

    2022  Volume 14, Issue 1, Page(s) e21362

    Abstract: Aim: The present study aims to determine the efficacy of bovine hydroxyapatite and collagen (G-graft) mixed with platelet-rich fibrin (PRF) used as a scaffold and chorion membrane as a barrier in post-extraction sockets with extraction sites alone.: ... ...

    Abstract Aim: The present study aims to determine the efficacy of bovine hydroxyapatite and collagen (G-graft) mixed with platelet-rich fibrin (PRF) used as a scaffold and chorion membrane as a barrier in post-extraction sockets with extraction sites alone.
    Methods and material: Thirty individuals were randomly assigned into two groups. In the control group, after debridement of the extracted tooth socket, no additional treatment was done. In the test group, after debridement of the extracted tooth socket, the sockets were filled with bovine hydroxyapatite and collagen (G-graft) mixed with PRF. They were covered by a chorion membrane, and a non-absorbable suture material was used to secure the membrane in place. Clinical parameters assessed were plaque index, gingival index, buccolingual width, buccal bone plate height, and lingual bone plate height at baseline and at six months.
    Results: Clinically, there was a more significant reduction in the buccolingual width of the control group than the test group after six months. A statistically significant difference between the two groups for vertical ridge height at the mesial and distal socket sites was observed. No statistically significant difference in buccal and lingual bone plate height was observed between the two groups (p>0.05).
    Conclusions: Both groups showed a significant reduction in the Buccolingual width, but it was less in the ridge preservation group. Thus, the use of G-graft with PRF and chorion membrane was highly effective in ridge preservation. Key messages: Natural bovine bone mineral, along with PRF and chorion as a membrane, can be utilized effectively for ridge preservation in extracted tooth sockets due to periodontal disease.
    Language English
    Publishing date 2022-01-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.21362
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Influence of alkali metal cations on the thermal, mechanical and morphological properties of rectorite/chitosan bio-nanocomposite films.

    Babul Reddy, A / Jayaramudu, J / Siva Mohan Reddy, G / Manjula, B / Sadiku, E R

    Carbohydrate polymers

    2015  Volume 122, Page(s) 230–236

    Abstract: The main theme of this work is to study the influence of ion-exchangeable alkali metal cations, such as: Li(+), Na(+), K(+), and Cs(+) on the thermal, mechanical and morphological properties. In this regard, a set of rectorite/chitosan (REC-CS) bio- ... ...

    Abstract The main theme of this work is to study the influence of ion-exchangeable alkali metal cations, such as: Li(+), Na(+), K(+), and Cs(+) on the thermal, mechanical and morphological properties. In this regard, a set of rectorite/chitosan (REC-CS) bio-nanocomposite films (BNCFs) was prepared by facile reaction of chitosan with ion-exchanged REC clay. The microstructure and morphology of BNCFs were investigated with XRD, TEM, SEM and AFM. Thermal and tensile properties of BNCFs were also investigated. As revealed from TEM and XRD results, the BNCFs featured a mixed morphology. Some intercalated clay sheets, together with nano-sized clay tactoids were obtained in LiREC/CS, NaREC/CS and KREC/CS of the BNCFs. From fractured surface study, via SEM, it was observed that the dispersion of chitosan polymer attaches to (and covers) the clay platelets. FTIR confirmed strong hydrogen bonds between clay and chitosan polymer. In addition, the thermal stabilities significantly varied when alkali metal cations varied from Li(+) to Cs(+). The BNCFs featured high tensile strengths (up to 84 MPa) and tensile moduli (up to 45 GPa). After evaluating these properties of BNCFs, we came to conclusion that these bio-nano composites can be used for packaging applications.
    MeSH term(s) Aluminum Silicates/chemistry ; Cations/chemistry ; Chitosan/chemistry ; Hydrogen Bonding ; Metals, Alkali/chemistry ; Microscopy, Electron, Scanning ; Minerals/chemistry ; Nanocomposites/chemistry ; Polymers/chemistry ; Surface Properties ; Tensile Strength
    Chemical Substances Aluminum Silicates ; Cations ; Metals, Alkali ; Minerals ; Polymers ; rectorite ; clay (1302-87-0) ; Chitosan (9012-76-4)
    Language English
    Publishing date 2015-05-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 1501516-6
    ISSN 1879-1344 ; 0144-8617
    ISSN (online) 1879-1344
    ISSN 0144-8617
    DOI 10.1016/j.carbpol.2014.12.053
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Novel cycloartane triterpenoids from the Nepal native plant Caragana sukiensis.

    Mandal, Reeta / Siva, Bandi / Phani Babu, V S / Suresh Babu, K / Jagadeesh, B / Ranjit, Rosa / Shrestha, Kanti / Gewali, Mohan Bikram

    Bioorganic & medicinal chemistry letters

    2015  Volume 25, Issue 22, Page(s) 5168–5171

    Abstract: A phytochemical study on the arial part of Caragana sukiensis resulted in the isolation of three new cycloartane triterpenoids 1-3 and their structures were fully established on the basis of detailed spectroscopic (especially 2D NMR and Mass) analysis. ... ...

    Abstract A phytochemical study on the arial part of Caragana sukiensis resulted in the isolation of three new cycloartane triterpenoids 1-3 and their structures were fully established on the basis of detailed spectroscopic (especially 2D NMR and Mass) analysis. These new compounds possessed hemiacetal fused tetrahydropyran rings at C-15/C-16, while 2 and 3 also contains d-xylose moiety.
    MeSH term(s) Caragana ; Magnetic Resonance Spectroscopy ; Saponins/chemistry ; Saponins/isolation & purification ; Spectrometry, Mass, Electrospray Ionization ; Triterpenes/chemistry ; Triterpenes/isolation & purification ; Xylose/chemistry
    Chemical Substances Saponins ; Triterpenes ; Xylose (A1TA934AKO)
    Language English
    Publishing date 2015-11-15
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1063195-1
    ISSN 1464-3405 ; 0960-894X
    ISSN (online) 1464-3405
    ISSN 0960-894X
    DOI 10.1016/j.bmcl.2015.09.073
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Structure and properties of highly toughened biodegradable polylactide/ZnO biocomposite films.

    Jayaramudu, J / Das, Kunal / Sonakshi, M / Siva Mohan Reddy, G / Aderibigbe, B / Sadiku, Rotimi / Sinha Ray, Suprakas

    International journal of biological macromolecules

    2014  Volume 64, Page(s) 428–434

    Abstract: Zinc oxide (ZnO) powder was investigated in terms of its use as filler in order to improve the inherent properties of PLA. Biocomposite films of PLA with different loadings of ZnO were prepared by solution casting method. Morphological analyses using SEM ...

    Abstract Zinc oxide (ZnO) powder was investigated in terms of its use as filler in order to improve the inherent properties of PLA. Biocomposite films of PLA with different loadings of ZnO were prepared by solution casting method. Morphological analyses using SEM and POM showed that the ZnO particles were well dispersed at low ZnO loading, with starfish-like morphology. However, ZnO agglomeration was found at higher ZnO loadings. Tensile testing showed improvements in strength and a moderate improvement in toughness at 2 wt% ZnO loading. This is consistent with the homogeneous dispersion of ZnO particles in the PLA matrix. ZnO particles incorporation improved the thermal stability of PLA. In summary, ZnO particles were shown to have the potential as a toughener in the preparation of biocomposites with better integrity, although other approaches, such as the use of compatibilizer in the surface modification of ZnO will be needed for the concurrent improvement of PLA properties.
    MeSH term(s) Biocompatible Materials/chemistry ; Materials Testing ; Mechanical Phenomena ; Microscopy, Electron, Scanning ; Polyesters/chemistry ; Thermogravimetry ; X-Ray Diffraction ; Zinc Oxide/chemistry
    Chemical Substances Biocompatible Materials ; Polyesters ; poly(lactide) (459TN2L5F5) ; Zinc Oxide (SOI2LOH54Z)
    Language English
    Publishing date 2014-03
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2013.12.034
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Timing of surgery in aortic stenosis.

    Mohan, Siva B / Stouffer, George A

    Current treatment options in cardiovascular medicine

    2006  Volume 8, Issue 6, Page(s) 421–427

    Abstract: Aortic valve stenosis (AVS) usually results from three distinct processes (degenerative-calcific, rheumatic, and congenital), with a final common pathway of significant aortic outflow tract obstruction. The stenotic lesion tends to progress slowly, but ... ...

    Abstract Aortic valve stenosis (AVS) usually results from three distinct processes (degenerative-calcific, rheumatic, and congenital), with a final common pathway of significant aortic outflow tract obstruction. The stenotic lesion tends to progress slowly, but once symptoms develop clinical deterioration can ensue rapidly. Chest pain, dyspnea, and syncope are the most common symptoms of significant AVS. Detection of symptoms, subtle or obvious, is critical to the management of AVS because their presence portends a worse overall prognosis and is an indication for intervention. There are several special clinical scenarios that require added consideration, including individuals with concomitant coronary artery disease, the presence of a relatively small transvalvular pressure gradient in the setting of low cardiac output (so-called low-gradient AVS), and elderly with severe AVS. Surgical aortic valve replacement (AVR) is the mainstay treatment for relief of obstruction in patients with symptomatic AVS. Percutaneous balloon valvuloplasty is reserved for the small minority of patients who are not surgical candidates and is associated with a high restenosis rate. Percutaneous AVR is a new technology that is being tested in a few select centers on patients who are not operative candidates.
    Language English
    Publishing date 2006-11-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2057337-6
    ISSN 1534-3189 ; 1092-8464
    ISSN (online) 1534-3189
    ISSN 1092-8464
    DOI 10.1007/s11936-006-0029-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article: A convergent and stereoselective total synthesis of (−)-crispine A, (−)-benzo[a]quinolizidine and (−)-salsolidine

    Reddy, N. Siva Senkar / Reddy, B. Jagan Mohan / Reddy, B.V. Subba

    Tetrahedron letters. 2013 Aug. 7, v. 54, no. 32

    2013  

    Abstract: A novel strategy has been developed for the syntheses of (−)-crispine, (−)-benzo[a]quinolizidine, and (−)-salsolidine using (R)-tert-butanesulfinamide as a source of chirality. The approach involves the stereoselective addition of Grignard reagent to ... ...

    Abstract A novel strategy has been developed for the syntheses of (−)-crispine, (−)-benzo[a]quinolizidine, and (−)-salsolidine using (R)-tert-butanesulfinamide as a source of chirality. The approach involves the stereoselective addition of Grignard reagent to chiral N-sulfinyl imine followed by cyclization of the secondary amide with a tethered halide as key steps.
    Keywords chemical structure ; organic compounds ; stereoisomerism
    Language English
    Dates of publication 2013-0807
    Size p. 4228-4231.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 204287-3
    ISSN 1873-3581 ; 0040-4039
    ISSN (online) 1873-3581
    ISSN 0040-4039
    DOI 10.1016/j.tetlet.2013.05.132
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  8. Article: Mutation analysis of PKD1 gene in Indian population.

    Kumar, B Siddhartha / Sharma, Pvgk / Reddy, Lava Kumar / Bhattaram, Manoj Prajwal / Mohan, Alladi / Kumar, V Siva

    Saudi journal of kidney diseases and transplantation : an official publication of the Saudi Center for Organ Transplantation, Saudi Arabia

    2012  Volume 23, Issue 1, Page(s) 143–147

    MeSH term(s) Amino Acid Sequence ; Base Sequence ; DNA Mutational Analysis ; Exons ; Genetic Predisposition to Disease ; Humans ; India ; Kidney Failure, Chronic/genetics ; Molecular Sequence Data ; Mutation ; Phenotype ; Polycystic Kidney, Autosomal Dominant/complications ; Polycystic Kidney, Autosomal Dominant/genetics ; TRPP Cation Channels/genetics
    Chemical Substances TRPP Cation Channels ; polycystic kidney disease 1 protein
    Language English
    Publishing date 2012-01
    Publishing country Saudi Arabia
    Document type Letter
    ZDB-ID 1379955-1
    ISSN 1319-2442
    ISSN 1319-2442
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Super Annigeri 1 and improved JG 74: two Fusarium wilt-resistant introgression lines developed using marker-assisted backcrossing approach in chickpea (Cicer arietinum L.)

    Mannur, D. M / Babbar, Anita / Thudi, Mahendar / Sabbavarapu, Murali Mohan / Roorkiwal, Manish / Yeri, Sharanabasappa B / Bansal, Vijay Prakash / Jayalakshmi, S. K / Singh Yadav, Shailendra / Rathore, Abhishek / Chamarthi, Siva K / Mallikarjuna, Bingi P / Gaur, Pooran M / Varshney, Rajeev K

    Molecular breeding. 2019 Jan., v. 39, no. 1

    2019  

    Abstract: Annigeri 1 and JG 74 are elite high yielding desi cultivars of chickpea with medium maturity duration and extensively cultivated in Karnataka and Madhya Pradesh, respectively. Both cultivars, in recent years, have become susceptible to race 4 of Fusarium ...

    Abstract Annigeri 1 and JG 74 are elite high yielding desi cultivars of chickpea with medium maturity duration and extensively cultivated in Karnataka and Madhya Pradesh, respectively. Both cultivars, in recent years, have become susceptible to race 4 of Fusarium wilt (FW). To improve Annigeri 1 and JG 74, we introgressed a genomic region conferring resistance against FW race 4 (foc4) through marker-assisted backcrossing using WR 315 as the donor parent. For foreground selection, TA59, TA96, TR19 and TA27 markers were used at Agricultural Research Station, Kalaburagi, while GA16 and TA96 markers were used at Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur. Background selection using simple sequence repreats (SSRs) for the cross Annigeri 1 × WR 315 in BC1F1 and BC2F1 lines resulted in 76–87% and 90–95% recurrent parent genome recovery, respectively. On the other hand, 90–97% genome was recovered in BC3F1 lines in the case of cross JG 74 × WR 315. Multilocation evaluation of 10 BC2F5 lines derived from Annigeri 1 provided one superior line referred to as Super Annigeri 1 with 8% increase in yield and enhanced disease resistance over Annigeri 1. JG 74315-14, the superior line in JG 74 background, had a yield advantage of 53.5% and 25.6% over the location trial means in Pantnagar and Durgapura locations, respectively, under Initial Varietal Trial of All India Coordinated Research Project on Chickpea. These lines with enhanced resistance and high yield performance are demonstration of successful deployment of molecular breeding to develop superior lines for FW resistance in chickpea.
    Keywords Cicer arietinum ; DNA shuffling ; Fusarium ; Fusarium wilt ; backcrossing ; chickpeas ; cultivars ; disease resistance ; genome ; genomics ; introgression ; microsatellite repeats ; research projects ; India
    Language English
    Dates of publication 2019-01
    Size p. 2.
    Publishing place Springer Netherlands
    Document type Article
    ZDB-ID 1230924-2
    ISSN 1572-9788 ; 1380-3743
    ISSN (online) 1572-9788
    ISSN 1380-3743
    DOI 10.1007/s11032-018-0908-9
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  10. Article ; Online: Mutation analysis of PKD1 gene in Indian population

    B Siddhartha Kumar / PVGK Sharma / Lava Kumar Reddy / Manoj Prajwal Bhattaram / Alladi Mohan / V Siva Kumar

    Saudi Journal of Kidney Diseases and Transplantation, Vol 23, Iss 1, Pp 143-

    2012  Volume 147

    Keywords Medicine ; R
    Language English
    Publishing date 2012-01-01T00:00:00Z
    Publisher Wolters Kluwer Medknow Publications
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

To top