Autor: Ravikumar, L. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Adsorption kinetic, equilibrium and thermodynamic investigations of Zn(II) and Ni(II) ions removal by poly(azomethinethioamide) resin with pendent chlorobenzylidine ring
Autorzy:: Kumar, P. S.
Ethiraj, H.
Venkat, A.
Deepika, N.
Nivedha, S.
Vidhyadevi, T.
Ravikumar, L.
Sivanesan, S.
Tematy:: adsorption
models
Ni(II) ions
poly(azomethinethioamide)
Zn(II) ions; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/780002.pdf Link otwiera się w nowym oknie
Opis:: This paper reports the application of poly(azomethinethioamide) (PATA) resin having the pendent chlorobenzylidine ring for the removal of heavy metal ions such as Zn(II) and Ni(II) ions from the aqueous solutions by adsorption technology. Kinetic, equilibrium and thermodynamic models for Zn(II) and Ni(II) ions adsorption were applied by considering the effect of contact time, initial metal ion concentration and temperature data, respectively. The adsorption influencing parameters for the maximum removal of metal ions were optimized. Adsorption kinetic results followed the pseudo-second order kinetic model based on the correlation coefficient (R2) values and closed approach of experimental and calculated equilibrium adsorption capacity values. The removal mechanism of metal ions by PATA was explained with the Boyd kinetic model, Weber and Morris intraparticle diffusion model and Shrinking Core Model (SCM). Adsorption equilibrium results followed the Freundlich model based on the R2 values and error functions. The maximum monolayer adsorption capacity of PATA for Zn(II) and Ni(II) ions removal were found to be 105.4 mg/g and 97.3 mg/g, respectively. Thermodynamic study showed the adsorption process was feasible, spontaneous, and exothermic in nature.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Emergence of a multidrug-resistant and virulent Streptococcus pneumoniae lineage mediates serotype replacement after PCV13 : an international whole-genome sequencing study
Autorzy:: Croucher, Nicholas
Skoczyńska, Anna
Egorova, Ekaterina
Wolter, Nicole
Turner, Paul
Moïsi, Jennifer
Devi Sekaran, Shamala
Moiane, Benild
Hawkins, Paulina A.
von Gottberg, Anne
Pollard, Sir Andrew J.
Dagan, Ron
Doiphode, Sanjay
Davydov, Alexander
Law, Pierra
Ochoa, Theresa
Nzenze, Susan
Muñoz-Almagro, Carmen
Voropaeva, Elena
Aanensen, David
Diawara, Idrissa
Bentley, Stephen D.
Lehmann, Deborah
De Gouveia, Linda
Verani, Jennifer
Everett, Dean
Lees, John
Tientcheu, Peggy-Estelle
Breiman, Robert F.
Belman, Sophie
Lo, Stephanie W.
Ip, Margaret
Kandasamy, Rama
Shakoor, Sadia
N Nair Thulasee Bhai, Jyothish
Mucavele, Helio
Gagetti, Paula
Clarke, Stuart
du Plessis, Mignon
Mirza, Shaper
Eberechi Akpaka, Patrick
Belabbès, Houria
Veeraraghavan, Balaji
Bentley, Leon
Titov, Leonid
Sigauque, Betuel
Givon-Lavi, Noga
Cornick, Jennifer E.
Nisar, Imran
Beall, Bernard
Benisty, Rachel
McGee, Lesley
Kwambana-Adams, Brenda
Keenan, Jeremy
Bojang, Ebrima
Srifuengfung, Somporn
Obaro, Stephen K.
Mostowy, Rafał
Paragi, Metka
Hryniewicz, Waleria
Mellor, Kate
Madhi, Shabir
Faccone, Diego
Klugman, Keith P.
Kumar, Narender
Varon, Emmanuelle
Elmdaghri, Naima
Grassi Almeida, Samanta Cristine
Ndlangisa, Kedibone
Maguire, Alison
Nagaraj, Geetha
Kiran, Anmol
Köseoglu Eser, Özgen
Sadowy, Ewa
Zhao, Chunjiang
Alaerts, Maaike
Rodgers, Gail
Ford, Rebecca L.
Urban, Yulia
Cohen, Robert
Hasanuzzaman, Md
Wang, Hui
Ho, Pak-Leung
Ravikumar, K. L.
Brooks, Abdullah
Antonio, Martin
Corso, Alejandra
Gladstone, Rebecca A.
Sampane-Donkor, Eric
Bigogo, Godfrey
Malaker, Roly
Ali, Mushal
Alonso, Alba Redin
Zerouali, Khalid
Nurse-Lucas, Michele
Kastrin, Tamara
Foster-Nyarko, Ebenezer
Carter, Philip E.
Porat, Nurit
Saha, Samir K.
de Cunto Brandileone, Maria Cristina
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 3.

Tytuł:: Fire management on container ships: new strategies and technologies
Autorzy:: Ricci, S.
Ravikumar, B.
Rizzetto, L.
Tematy:: fire safety
container ship
drone
CCTV
fiber optic
control strategy
cargo safety
maritime transport; Pokaż więcej
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Powiązania:: https://bibliotekanauki.pl/articles/24201466.pdf Link otwiera się w nowym oknie
Opis:: Design and construction of container ships follow consolidated requirements, with standard consideration of fire management. Indeed, cargo fires can have important consequence on crewmembers and cargoes, as well as impacting coastal zone and marine environment. Innovative strategies include prevention of events and mitigation of consequences. Digital solutions, providing with situational pictures onboard and around the vessel are fundamental for new fire management solutions, seamless and integrated into the vessel IT infrastructure, according to IMO regulations and the recent EMSA CARGOSAFE Report. The assessment of these solutions requires theoretical evaluation, validation activities in simulated environment and demonstration activities in real environments, with use cases to prove feasibility and benefits. This paper, after a review of traditional preventing and mitigating solutions against fire and an analysis of container ships fires, proposes applicable innovative technologies and operational measures, emerging problems for their potential implementation and requirements for virtual and real tests design.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Bioethanol production from agro waste – Pigeon pea (Cajanus cajan (L.) Millsp.) stalk using solid state fermentation
Autorzy:: Kirti, Kirti
Patil, Ravikumar S.
Londonkar, Ramesh L.
Tematy:: Aspergillus niger
Bioethanol
Cajanus cajan
Pigeon pea
Saccharomyces cerevisiae
agro waste
biomass
lignocellulose; Pokaż więcej
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:: https://bibliotekanauki.pl/articles/1076037.pdf Link otwiera się w nowym oknie
Opis:: In view of raising prices of crude oil and due to increasing demands the need for alternative sources of bioenergy is expected to increase sharply in the coming years. Cajanus cajan Stalks is the major agricultural residue, more than 25% primary energy demands met through imports mainly in the form of crude oil and natural gas. Biofuels as a domestic renewable energy source can significantly reduce India’s dependence on foreign oil and fossil fuels. The Plant cell wall is a composite material in which cellulose, hemicelluloses & lignin are closely associated. The major constraint in successful bioconversion process is the lignin. The study was conducted for various pretreatment methods. The best is the steam pretreatment method. This method serves as best and effective pretreatment with the maximum removal of lignin and isolation of more reducing sugars and less pentose’s. The alkaline method specially NaOH treatment is used for extraction of more pentose’s in crude extract. Finally, our approach was to find out the best pretreatment method that result in release of maximum reducing sugars. Steam pretreatment serves to be best followed by saccharification by cellulose. Further, these fermentable sugars can be utilized for bioethanol production. Cajanus cajan stalk is mostly cultivated in Kalaburagi district of Karnataka for that can be used for ethanol production. Screening for isolation of S. cereviceae was carried out by using baker’s yeast and was grown in YPD media. The optimization of culture condition was carried out for growth of yeast showed optimum temperature at 30 ºC and optimum pH at 5. Optimum Cellulase enzyme activity was found to be at temperature 40 ºC and pH 4.5. The ethanol production reaction was optimized by the maximum utilization of sugars by yeast was optimized by providing hexose and with combination of xylose at temperature 30 ºC and pH 5.0 and the inoculum size was optimized at 5% volume of total volume for SSF. From the above results, it is clear that the cellulase enzyme isolated from Aspergillus niger has ability to grow and produce hexoses under conditions of optimum temperature and acidic pH. The reducing sugar and pentose’s both can be used together for ethanol production. The obtained reducing sugar and pentose’s sugar conc. were 1.025 gm/500 ml & 0.5 gm/500 ml. This is only possible by using biological enzymatic pretreatment. The resultant substrate can used for making 2-3% ethanol. Thus fermentable sugars by these methods can be utilized for bioethanol production. The ethanol produced from this agro waste is 2-3% in lab scale. Then go for pilot scale 4-5% and later for industrial scale 7-8% by treat with different pretreatment methods using SSF. This helps in increases the utilization of wastes for economic use and improves the biofuel production resources.
Dostawca treści:: Biblioteka Nauki

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