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Tytuł:
Influence of micropropagation with addition of kinetin on development of a willow (Salix viminalis L.)
Autorzy:
Grendysz, Joanna
Jacek, Jacek
Danuta, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/1178532.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
MS medium
Salicaceae
cytokinin
micropropagation
Opis:
The aim of the dissertation was to determine (select) the best growth medium for a basket willow (Salix viminalis L.) which contains optimal concentration of kinetin. The plant material taken from three varieties of willows: Bjor, Jorr and Tora, which grew in the experimental field, was sterilized and placed on a complete MS (Murashige and Skoog, 1962) growth medium. The propagated plants were used in an experiment, where MS substrate was enriched by growth regulator – kinetin, in various concentrations (0.5 mg∙dm-3, 1 mg∙dm-3, 2 mg∙dm-3 and 3 mg∙dm-3). The substrate which contained 0.5 KIN was considered to be the best for willow’s propagation, because plants cultivated with usage of this medium have shown the largest mass, the highest number of shoots and leaves, and also the highest quantitative and elongation growth of the roots. Among examined varieties of Salix, the best one was Bjor variety, where evaluated parameters were distinctive in comparison to two remaining varieties.
Źródło:
World Scientific News; 2017, 70, 2; 201-215
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Small and medium companies in the market economy
Autorzy:
Kowalczyk, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1179332.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
economy
market
small and medium companies
Opis:
This papers present the aspects of small and medium companies. The specific market economy and the entrepreneurship is characterised with both positive and negative features. The essential market economy, business activity, as well as small and medium companies are described in this papers.
Źródło:
World Scientific News; 2017, 78; 76-80
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In Vitro Micropropagation of Drosera rotundifolia
Autorzy:
Jadczak, Paula
Kulpa, Danuta
Zbrojewska, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/1182743.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
MS medium
carnivorous
micropropagation
phytohormones
plants
Opis:
The aim of the study was to determine an optimal composition of growth media for Drosera rotundifolia L. cultured in vitro. Adventitious shoots of Drosera rotundifolia originating from an established in vitro culture were placed on complete Murashige and Skoog (MS) (1962) medium, MS medium with nutrient content reduced to ¾ MS, ½ MS, ¼ MS, 1/6 MS and MS medium with selected macronutrient (KNO3, KNO3 + NH4NO3, KH2PO4 or CaCl2) content reduced by ½. The medium containing ¼ of standard MS nutrients was found the most effective, as plants in this variant had the greatest weight and developed the greatest number of adventitious shoots (37.1). It was also conducive to root growth and development. Flowering was only observed on complete MS, ¾ MS and ½ MS media and MS with reduced content of KNO3 or KNO3 + NH4NO3. Reducing mineral content to ¼ MS or more resulted in red coloration of glandular tentacles.
Źródło:
World Scientific News; 2017, 66; 75-85
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prospects for development of the SME sector in Poland in the, field of governments policy towards small and medium-sized enterprises
Autorzy:
Nowakowska - Grunt, Joanna
Kowalczyk, Anna
Wojtaszek, Henryk
Powiązania:
https://bibliotekanauki.pl/articles/1177446.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
competitiveness
economy
small and medium-sized enterprises
Opis:
As a result of economic transformation, dynamic development of entrepreneurship took place. It effected in over 2 million small and medium-sized enterprises, that currently operate. The SME sector (micro, small and medium companies) comprises the vast majority of companies in Poland, namely 99.8%. The smallest entities are obviously the most numerous ones - 96% are micro-companies (1.84 million). The share of small companies in the structure of Polish companies is 3.0% (56.7 thousand), whereas for medium companies it is 0.8% (15.6 thousand), and for large companies it is only 0.2% (3.4 thousand). Condition and development prospects for small and medium companies and other participants of economic life generally depend on macroeconomic conditions. Therefore, the basic condition for long-term development of the small and medium-sized company sector should be recognized as stable macroeconomic policy held by the state, ensuring long-term economic balance, simultaneously leading to gradual reduction of tax and interest rates.
Źródło:
World Scientific News; 2018, 103; 223-233
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In vitro propagation through ex vitro rooting of a medicinal spice Piper longum Linn.
Autorzy:
Ravindran, C. P.
Manokari, M.
Shekhawat, Mahipal S.
Powiązania:
https://bibliotekanauki.pl/articles/1192070.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Piper longum
endangered
MS medium
Ex vitro rooting
Opis:
Successful in vitro propagation through ex vitro rooting mechanism has been achieved in Piper longum by nodal shoot segment cultures. Shoot tip explants were less proliferative compared to the nodal meristems. The explants were sterilized using 0.1% HgCl2 and cultured on Murashige and Skoog (MS) medium with various concentrations of growth regulators. MS medium supplemented with 1.0 mg/L 6-benzylaminopurine (BAP) was found suitable for bud breaking within four weeks. Kinetin (Kin) was not reported impressive compared to BAP in culture induction response. The shoots were multiplied and elongated on MS medium supplemented with 0.5 mg/L each of BAP and Kin and 0.1 mg/L indole-3 acetic acid (IAA), where the shoots were elongated up to 5.8 cm length. Rooting and acclimatization was achieved by ex vitro rooting methods using 300 mg/L indole-3 butyric acid (IBA) for 5 min, and 5.3 roots with 3.2 cm average length were observed. The rooted shoots were transferred to the greenhouse for acclimatization. The hardened plantlets were transferred to earthen pots and maintained in the greenhouse. Normal flowering was observed in micropropagated plants of P. longum.
Źródło:
World Scientific News; 2016, 37; 12-24
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hematology and serum biochemical changes in response to change in saline concentration in fresh water fish Notopterus notopterus
Autorzy:
Kavya, K. S.
Jadesh, M.
Kulkarni, R. S.
Powiązania:
https://bibliotekanauki.pl/articles/1186746.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Fresh Water fish
Notopterus notopterus
Saline medium
hematology
Opis:
The present investigation aim was to study the hematological and serum biochemical changes under increased saline medium in the fresh water fish Notopterus notopterus. The fish was able to thrive well in higher well in higher saline medium up to 0.16%. The exposure to saline medium was for a period of one month. After the termination of exposure to saline medium, the fish blood was collected and proceeded for hematological and serum biochemical studies. The result indicates that there was no change in the blood glucose, urea, where as there was an increase in the blood protein, triglycerides and cholesterol along with hemoglobin, RBC, WBC, creatinine, enzymes like SGPT, SGOT, alkalinephosphatase. The blood electrolytes like sodium, potassium and calcium also increased in experimental fishes.
Źródło:
World Scientific News; 2016, 32; 36-47
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of in vitro regeneration in Hibiscus subdariffa L. – An important medicinal plant
Autorzy:
Manokari, M.
Ravindran, C. P.
Shekhawat, Mahipal S.
Powiązania:
https://bibliotekanauki.pl/articles/1191358.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Hibiscus subdariffa
MS medium
growth regulators
plantlet regeneration
Opis:
In vitro propagation methods using nodal segments of young tissues of Hibiscus subdariffa plant have been established. The nodal shoot segments responded better than apical shoot tip explants. Murashige and Skoog (MS) semi-solid medium supplemented with 1.0 mg/L 6-benzylaminopurine (BAP) induced 4.2 ±0.24 shoots per node with 2.40 ±0.18 cm in length after four weeks of inoculation. About 92% explants responded on this medium combination. The shoots were further multiplied (8.2 ±1.37 shoots with 5.9 ±1.05 cm length) by repeated subculture of mother explants and freshly induced shoot clumps on MS medium with the reduced concentrations of BAP and Kinetin (0.5 mg/L each) with additives within 4 weeks. Half strength MS medium augmented with 2.0 mg/L indole-3 butyric acid (IBA) was found most favorable for root induction with 98% response. On this medium 7.5 ±0.61 roots with 4.8 ±0.23 cm length of roots were recorded. The regenerated plantlets were successfully hardened and field transferred.
Źródło:
World Scientific News; 2016, 34; 51-62
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implications of Auxins in Induction of Adventitious Roots from Leaf Explants of Cannon Ball Tree (Couroupita guianensis Aubl.)
Autorzy:
Manokari, M.
Shekhawat, Mahipal S.
Powiązania:
https://bibliotekanauki.pl/articles/1191424.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Adventitious roots
Couroupita guianensis
Half strength MS medium
Lecythidaceae
Opis:
An effective protocol has been developed for the adventitious root culture of Cannon Ball tree (Couroupita guianensis Aubl.) from the leaves of in vitro germinated 30 days’ old seedlings. Seeds germinated on cytokinins and auxins supplemented with Murashige and Skoog (MS) medium. Half strength MS medium supplemented with 2.0 mg/L indole-3-butyric acid (IBA) was found the most suitable for the induction of adventitious roots (92%) from the midrib region of the leaves than the other auxins. The roots were proliferated on half strength MS liquid medium supplemented with IBA 0.5 mg/L. After eight weeks of inoculation the roots in the medium yielded 5.933 ±0.135 gm fresh and 2.731 ±0.010 gm dry biomass of adventitious roots. The growth rate was increased by 8-9 folds in this investigation.
Źródło:
World Scientific News; 2016, 33; 109-121
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zinc oxide nanoparticles synthesis from Moringa oleifera Lam. Extracts and their characterization
Autorzy:
Manokari, M.
Shekhawat, Mahipal S.
Powiązania:
https://bibliotekanauki.pl/articles/1192606.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Zinc oxide nanoparticles
Moringa oleifera
UV-Visible spectroscopy
Reaction medium
Opis:
The enormous applications of metal nanoparticles urged to find new biologically hazard free methods for huge synthesis. The green synthesis approaches are acknowledged by many scientists due to its cost effective, simple, eco-friendly and resourceful move. The present investigation deals with the bio-production and characterization of zinc oxide (ZnO) nanoparticles using leaf, stem, flowers and fruit pods of the medicinal plant Moringa oleifera. The synthesis of ZnO nanoparticles from the aqueous extracts were mediated by Zinc Nitate Hexahydrate as precursor. Various parameters like time periods, concentration of plant extracts and different temperatures were influenced the synthesis of ZnO nanoparticles. The stability and reduction of zinc ions to ZnO nanoparticles were characterized by UV-Visible spectroscopic analysis. The reaction medium from the leaves and flowers showed strong absorption at 308nm. The stem and fruit pods reaction medium existed absorption peak at 293nm.
Źródło:
World Scientific News; 2016, 55; 252-262
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Direct regeneration of Withania somnifera (L.) Dunal – A medicinal plant
Autorzy:
Kannan, T. M. Sathees
Anbazhakan, S.
Powiązania:
https://bibliotekanauki.pl/articles/1186751.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
M.S–B5 medium
ithania somnifera
medicinal plant
meristematic explants
Opis:
Plants have been an important source of medicine for thousands of years. Medicinal plants are the most important source of life saving drugs. Even today, the WHO estimates that up to 80 per cent of people still rely mainly on traditional remedies such as herbs for their medicines. Medicinal plants are resources of new drugs. Approximately one quarter of prescribed drugs contain plant extracts or active ingredients obtained from plant substances. Medicinal plants are the most important source of life saving drugs for the majority of the world’s population. The biotechnological tools are important to select, multiply and conserve the critical genotypes of medicinal plants. In-vitro regeneration holds tremendous potential for the production of high-quality plant-based medicine. An efficient protocol was developed for high frequency and rapid regeneration was achieved in Withania somnifera (L.) Dunal. Invitro cultures were initiated by meristematic explants on M.S–B5 medium with various growth hormones individually as well as combinations. Highest shoot multiplication rates were observed when explants grown in the medium supplemented with 2.0 mg/l of BAP. M.S–B5 medium fortified with 1.0 mg/l BAP was found suitable for optimum growth and elongation of shoots. The best rooting response were observed when the medium containing 1.0 mg/l of IBA. The rooted plantlets were successfully established in soil.
Źródło:
World Scientific News; 2016, 32; 60-70
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generalized Law of Gravitation
Autorzy:
Etkin, V. A.
Powiązania:
https://bibliotekanauki.pl/articles/1179617.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
astronomical observations
fundamental astrophysics
gravitation
interaction models
interdisciplinary Physics
interstellar medium
mechanics
Opis:
A new law of gravitation is established for continuous media, which establishes the correspondence of the sign of force to the density gradient of matter. Conditions are found under which it becomes the law of gravitation of Newton. The new law predicts the observed character of the rotation curves of galaxies, the existence of "strong" gravity and gravitational equilibrium. The data of recent astronomical observations confirming the presence of gravitational forces of attraction and repulsion are given.
Źródło:
World Scientific News; 2017, 74; 272-279
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of thermal radiation and heat generation on hydromagnetic flow of nanofluid over an exponentially stretching sheet in a porous medium with viscous dissipation
Autorzy:
Murugesan, Thiagarajan
Kumar, M. Dinesh
Powiązania:
https://bibliotekanauki.pl/articles/1059429.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
MHD
Nanofluid
exponentially stretching sheet
heat generation
porous medium
thermal radiation
viscous dissipation
Opis:
This paper studies, the impacts of heat generation on MHD flow of radiative nanofluid over an exponentially stretching sheet in a porous medium with viscous dissipation are numerically analyzed. Two sorts of nanofluids, generated by solid nanoparticles with water such as alumina-water nanofluid and silver-water nanofluid were investigated. With the use of similarity transformations, to obtain a system of nonlinear ordinary differential equations. The resulting boundary value problem is solved numerically using the Nachtsheim-Swigert shooting technique scheme together with fourth-order Runge-Kutta integration method. Numerical results are obtained for the velocity, temperature distribution and concentration profiles for selected values of the governing physical parameters of combined magnetic interaction and porosity parameter, heat generation parameter, viscous dissipation parameter, thermal radiation parameter, solid volume fraction parameter, chemical reaction parameter and Lewis number are discussed. Quantities of engineering interest such as Skin friction coefficient, Nusselt number, and Sherwood number are also obtained numerically and are tabulated.
Źródło:
World Scientific News; 2019, 128, 2; 130-147
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The condition of the cryptocurrency market in Poland on the background of global development. Small and medium companies
Autorzy:
Miciuła, Ireneusz
Powiązania:
https://bibliotekanauki.pl/articles/1062953.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Small and medium companies
cryptocurrencies
cryptocurrency market
financial innovations
market regulations for cryptocurrencies
Opis:
The development of the cryptocurrency market and the implications for the whole economy and finance all traders causes a keen interest in this subject. The article discusses the functioning of a financial system based on cryptocurrencies and its significance for economies. It was presented the development of the global cryptocurrency market and analyzed the most popular cryptocurrency, bitcoin. The analysis and assessment of the state and structure of the Polish cryptocurrencies market were presented on the background of the global cryptocurrency market. Also we presented the possible development paths for the cryptocurrencies market in the world.
Źródło:
World Scientific News; 2019, 124, 2; 143-154
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carnot heat engine efficiency with a paramagnetic gas
Autorzy:
Malaver, Manuel
Powiązania:
https://bibliotekanauki.pl/articles/1066270.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Carnot heat engine
external magnetic field
ideal paramagnetic gas
ideal paramagnetic medium
magnetic moment
thermal efficiency
Opis:
The ideal gas approach is very useful in the study of behavior of the compressible fluids because it considers that the gas is composed of many randomly point particles and the interactions between them are perfectly elastic. The ideal gas concept is very important in the analysis of thermodynamic systems and in statistical mechanics. A system that can be studied with this approximation is the ideal paramagnetic gas, which consists of molecules where each of them possesses a magnetic moment in the presence of an external magnetic field. In this paper, we extended the work of Malaver (2015, 2018) for a variable Chaplygin gas to a paramagnetic medium and we have obtained some equations that describe thermodynamic behavior in an ideal paramagnetic gas. It has been derived an expression for the thermal efficiency of Carnot heat engine with a paramagnetic gas as working substance. We found that the efficiency depends on the limits of maximum and minimal temperature imposed on the Carnot cycle, as in the ideal gas, photon gas and variable Chaplygin gas.
Źródło:
World Scientific News; 2019, 130; 116-126
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on the Effects of Inclined Magnetic Field, Flow Medium Porosity and Thermal Radiation on Free Convection of Casson Nanofluid over a Vertical Plate
Autorzy:
Sobamowo, M. G.
Yinusa, A. A.
Makinde, O. D.
Powiązania:
https://bibliotekanauki.pl/articles/1046549.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Casson nanofluid
Flow medium porosity
Free convection
Inclined magnetic field
Thermal radiation
Variational homotopy perturbation method
Opis:
In this paper, variational homotopy perturbation method with Padé approximant technique is applied to investigate the impacts of inclined magnetic field, flow medium porosity and thermal radiation on free convection flow and heat transfer of Casson nanofluids over a vertical plate. The accuracies of the developed analytical methods are verified by comparing the results of the analytical solutions with the results of past works as presented in literature. Thereafter, the analytical solutions are used to investigate the effects of thermal radiation; Prandtl number, nanoparticles volume-fraction, shape and type on the flow and heat transfer behaviour of various nanofluids over the flat plate. It is observed that both the velocity and temperature of the nanofluid as well viscous and thermal boundary layers increase with increase in the radiation parameter. The velocity and temperature of the nanofluid decreases and increases, respectively as the Prandtl number and volume-fraction of the nanoparticles in the basefluid increase. The maximum decrease in velocity and maximum increase in temperature are caused lamina shaped nanoparticle and followed by platelets, cylinder, bricks and sphere-shaped nanoparticles, respectively. It is hoped that the present study will enhance the understanding of free convection boundary-layer problems under the influence of thermal radiation as applied in various engineering processes.
Źródło:
World Scientific News; 2019, 138, 1; 1-64
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł

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