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    Wyświetlanie 1-7 z 7
    Tytuł:
    Green Approach to Intensify the Extraction Processes of Substances from Plant Materials
    Autorzy:
    Malyushevskaya, Antonina
    Koszelnik, Piotr
    Yushchishina, Anna
    Mitryasova, Olena
    Gruca-Rokosz, Renata
    Powiązania:
    https://bibliotekanauki.pl/articles/2173315.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    green approach
    plant material
    extraction
    polysaccharides
    pulsed electric field
    Opis:
    The principles of sustainable development and green chemistry are priorities in the development of new technologies for the extraction of useful biologically active substances, for example, in the manufacture of medicines. The processes of extracting substances from plant raw materials have many applications. Intensification of such processes, reducing their duration, energy consumption and consumption of the extractant is urgent. The object of the reseach is the green approach to intensify the extraction processes of polysaccharide substances from plant materials. The research methodology was experimental with statistical data processing. In the field of experimental research was the process of the influence of pulsed, alternating and direct current on the intensity of aqueous extraction of polysaccharides from plant materials. The high efficiency of intensification of extraction by a pulsed electric field was studied. The process can reduce the time for obtaining water-soluble polysaccharides by 3 times in comparison with traditional pharmacopoeial convection methods and reduce energy consumption by 20 times. The significance of the pulse current parameters for effective extraction was determined: the referred pulse shape, the frequency of the pulse current for extracting the maximum amount of water-soluble polysaccharides, the pulse duration, and the optimal processing time. The green approach to the use of a moderate electric field of pulsed current to accelerate the extraction of biologically active substances is the basis of the method of intensification of other traditional mass transfer processes for the sustainable development of technology.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 7; 197--204
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Approximate controllability of second order infinite dimensional systems
    Autorzy:
    Klamka, Jerzy
    Khurshudyan, Asatur Zh.
    Powiązania:
    https://bibliotekanauki.pl/articles/1409079.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    infinite dimensional systems
    approximate controllability
    Green’s function approach
    flexible Kirchhoff–Love plate
    Opis:
    In the paper approximate controllability of second order infinite dimensional system with damping is considered. Applying linear operators in Hilbert spaces general mathematical model of second order dynamical systems with damping is presented. Next, using functional analysis methods and concepts, specially spectral methods and theory of unbounded linear operators, necessary and sufficient conditions for approximate controllability are formulated and proved. General result may be used in approximate controllability verification of second order dynamical system using known conditions for approximate controllability of first order system. As illustrative example using Green function approach approximate controllability of distributed dynamical system is also discussed.
    Źródło:
    Archives of Control Sciences; 2021, 31, 1; 165-184
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heating control of a finite rod with a mobile source
    Autorzy:
    Jilavyan, Samvel H.
    Grigoryan, Edmon R.
    Khurshudyan, Asatur Zh.
    Powiązania:
    https://bibliotekanauki.pl/articles/1409386.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    null-controllability
    mobile control
    nonlinear constraints
    triangular wave
    rectangular wave
    Green’s function approach
    heuristic control
    lack of exact controllability
    Opis:
    The Green’s function approach is applied for studying the exact and approximate null-controllability of a finite rod in finite time by means of a source moving along the rod with controllable trajectory. The intensity of the source remains constant. Applying the recently developed Green’s function approach, the analysis of the exact null-controllability is reduced to an infinite system of nonlinear constraints with respect to the control function. A sufficient condition for the approximate null-controllability of the rod is obtained. Since the exact solution of the system of constraints is a long-standing open problem, some heuristic solutions are used instead. The efficiency of these solutions is shown on particular cases of approximate controllability.
    Źródło:
    Archives of Control Sciences; 2021, 31, 2; 417-430
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Boundary element modelling of wave diffraction by interaction with wave-offshore structure and dredged region
    Autorzy:
    Kim, S. D.
    Lee, H. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/259525.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Submarine pit
    Green function
    boundary integral approach
    breakwater
    Opis:
    The purpose of this study is to estimate the wave height at the front face of breakwater (Refracted breakwater and Straight breakwater), when dredging like the submarine pit is performed in the distant offshore from outer breakwater. The wave field of the problem is considered to be two dimensional planes and the configuration of the pit region is designated by a single horizontal long-rectangular system. The numerical approach uses the Green function based on the boundary integral approach. The results of the present numerical works are illustrated by applying the normal and inclined incidence. It is shown that in the case of normal incidence, the ratio of wave height reduction at the front face of both types of breakwaters is approximately more than 20% due to the effect of the submarine pit on the sea bed. Furthermore, regardless of the type of breakwater and the difference in incident wave angles, the ratio of wave height was shown to be reduced.
    Źródło:
    Polish Maritime Research; 2010, 2; 67-71
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On discontinuties in thermoelastic plane waves without energy dissipation due to a thermo-mechanical shock
    Autorzy:
    Sarkar, N.
    Lahiri, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/265406.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    termosprężystość
    natężenie Greena-Naghdiego
    generalized thermoelasticity
    Green-Naghdi model
    thermoelastic half-space
    pulse function
    eigenvalue approach
    Opis:
    The present paper deals with the thermoelastic plane waves due to a thermo-mechanical shock in the form of pulse at the boundary of a homogeneous, isotropic thermoelastic half-space. The field equations of the Green- Naugdhi theory without energy dissipation for an thermoelastic solid in the generalized thermoelasticity theory are written in the form of a vector-matrix differential equation using Laplace transform techniques and then solved by an eigenvalue approach. Exact expressions for the considered field variables are obtained and presented graphically for copper-like material. The characteristic features of the present theory are analyzed by comparing these solutions with their counterparts in other generalized thcrmoelasticity theories.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2013, 18, 2; 503-519
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Achieving sustainable development through strategic green supply chain management
    Autorzy:
    Annapoorna, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/392780.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    green supply chain
    environment
    supplier performance management
    holistic approach
    sustainable development
    zielony łańcuch dostaw
    środowisko
    zarządzanie oceną dostawców
    podejście holistyczne
    zrównoważony rozwój
    Opis:
    Environmentally and socially responsive supply chains are in the early adoption stages in India. Global supply chains need worldwide goals, and the key to the success of Green Supply Chain Management is to bring the worldwide industry together to decide upon and pledge to work towards reasonable and concrete goals that will make a real difference to the environment. Customers are increasingly demanding to know where products come from, how they are made and distributed and what impact future environmental legislations will have on the products they buy. The aim of this paper is to provide action plans and facilitate knowledge among supply chain practitioner that they need to go green the business efficiently, and communicate these efforts to their customers, partners, and the public. In fact, the paper discusses the key drivers for green initiatives include government compliance, improved customer and public relations, a decreased fuel bill and financial ROI through various supply chain initiatives such as reverse logistics. Further, increasing supply chain efficiency, improving investor relations, decreasing risk and a larger corporate responsibility agenda are identified as important factors in the strategic decision to go green. Companies working in India are not properly addressing these measures in supply chain design and operations. That is why, the paper further elaborates strategic management of green supply chain, which involves collecting and analyzing environmental regulations and customer concerns, discussing the relevant environmental issues with the procurement, manufacturing and quality control departments across the supply chain firms and finally developing and communicating the green supply chain policies to all members of the supply chain i.e. supplier’s supplier to customer’s customer.
    Źródło:
    Organizacja i Zarządzanie : kwartalnik naukowy; 2019, 3; 5-11
    1899-6116
    Pojawia się w:
    Organizacja i Zarządzanie : kwartalnik naukowy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ionic liquids as alternative solvents for energy conservation and environmental engineering
    Autorzy:
    Padinhattath, Sachind Prabha
    Chenthamara, Baiju
    Gardas, Ramesh L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1429837.pdf
    Data publikacji:
    2021
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    ionic liquid
    green solvent
    energy resources
    pollution control
    bio-extraction
    circular economic approach
    ciecz jonowa
    rozpuszczalnik ekologiczny
    zasoby energii
    kontrola zanieczyszczeń
    bio-ekstrakcja
    Opis:
    Because of industrialization and modernization, phenomenal changes have taken place in almost all spheres of life. Consequently, the consumption of energy resources and the cases of environmental hazards have risen to an unprecedentedly high level. A development model with due consideration to nature and an efficient utilization of energy sources has become the need of the hour, in order to ensure a sustainable balance between the environmental and technological needs. Recent studies have identified the suitability of ionic liquids (ILs), often labeled as ‘green solvents’, in the efficient utilization of energy resources and activities such as bio-extraction, pollution control, CO2 capture, waste management etc. in an environmentally friendly manner. The advent of magnetic ionic liquids (MILs) and deep eutectic solvents (DESs) have opened possibilities for a circular economic approach in this filed. This review intends to analyze the environmental and energy wise consumption of a wide variety of ionic liquids and their potential towards future.
    Źródło:
    Acta Innovations; 2021, 38; 62-79
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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