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Wyświetlanie 1-50 z 828
Tytuł:
Multi-valued codensing random operators and functional random integral inclusions
Autorzy:
Dhage, B. C.
Powiązania:
https://bibliotekanauki.pl/articles/255621.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
monotone multi-valued random operator
random differential inclusion
existence
Opis:
In this paper, some random fixed point theorems for continuous and condensing multi-valued random operators are proved and they are further applied to the random integral inclusions for proving the existence of the solutions via the priori bound method.
Źródło:
Opuscula Mathematica; 2011, 31, 1; 27-48
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corn-stalk lodging and borer damage as influenced by varying corn densities and planting geometry with soybean [Glycine max. L. Merrill]
Autorzy:
Echezona, B.C.
Powiązania:
https://bibliotekanauki.pl/articles/25905.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
Zea mays
borer damage
corn
soybean
Glycine max
planting density
planting geometry
Źródło:
International Agrophysics; 2007, 21, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sexual dimorphism in halacarid mites (Acari, Halacaridae): an updated overview
Dymorfizm płciowy u Halicaridae (Acari): obecny stan wiedzy
Autorzy:
Chatterjee, T.
Guru, B.C.
Powiązania:
https://bibliotekanauki.pl/articles/841696.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
sexual dimorphism
halacarid mite
mite
Acari
Halacaridae
male
female
morphology
genital system
Opis:
An updated overview of sexual dimorphism in halacarid mites is presented in this paper. Males and females of halacarid mites morphologically differ in the genital region. Additionally, sexual dimorphism can be seen in some species in dorsal plates, ventral plates, chaetotaxy of legs, idiosoma, gnathosoma, which is the theme of the present paper. A distinction of males vs. female mites is someti - mes reflected in size and fusion of various idiosomal plates and width of cuticular membranous areas. Other sexually dimorphic characters such as paragenital are - olae, postgenital papillae, lamella in legs, fossary setae on tarsus found in some species of halacarids are also discussed
W artykule zaprezentowano przegląd obecnego stanu wiedzy na temat dymorfizmu płcio - wego u Halacaridae. Samice i samce Halacaridae przede wszystkim różnią się morfologią rejonu genitalnego. Dodatkowo dymorfizm płciowy zaznacza się u niektórych gatunków w wyglądzie tarcz grzbietowych, tarcz brzusznych, chemotaksji odnóży krocznych oraz ogólnym kształtem idiosomy i gnatosomy. Odmienność samców i samic może czasami przejawiać się rozmiarach tarcz idiosomalnych, ich łączeniu się oraz szerokościach mięk - kich, kutykularnych odstępów pomiędzy tarczami. W pracy omówiono również inne róż - nice płciowe: przyssawki genitalne, płytki na nogach, zagłębione szczeciny na stopach
Źródło:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica; 2012, 19
1230-3976
Pojawia się w:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody diagnozowania w systemach aktywnego zabezpieczenia niezawodności napędów hydraulicznych
Diagnosti? methods in active insuring reliability systems of hydraulic machine drives
Autorzy:
Szewczenko, B. C.
Kwaśniewski, L.
Powiązania:
https://bibliotekanauki.pl/articles/329264.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
struktura
niezawodność
układ hydrauliczny
structure
reliability
hydraulic structure
Opis:
W artykule przedstawiono strukturę i metody zabezpieczenia niezawodności napędów hydraulicznych. Opisano również schemat sterowania procesami określającymi niezawodność układów hydraulicznych.
The article introduced the structure and protection methods of hydraulic drives reliability. There were also described the hydraulic arrangements patern defining the reliability of processes.
Źródło:
Diagnostyka; 2005, 33; 290-294
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Existence and attractivity results for nonlinear first order random differential equations
Autorzy:
Dhage, B. C.
Ntouyas, S. K
Powiązania:
https://bibliotekanauki.pl/articles/255550.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
random differential equations
locally attractive
globally attractive
local asymptotic attractive
fixed point theorem
Opis:
In this paper, the existence and attractivity results are proved for nonlinear first order ordinary random differential equations. Two examples are provided to demonstrate the realization of the abstract developed theory.
Źródło:
Opuscula Mathematica; 2010, 30, 4; 411-429
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The importance of the law of the wall
Autorzy:
Mandal, B. C.
Mazumdar, H. P.
Powiązania:
https://bibliotekanauki.pl/articles/265857.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
boundary layer
flat plate
friction factor
skin friction
warstwa graniczna
współczynnik tarcia
przepływ rurowy
Opis:
This paper reports some results of turbulent boundary layer computation. The calculation is made assuming that law of the wall is valid throughout the boundary layer. Simple relations are proposed for friction for a smooth pipe and a flat plate at zero incidence. The results are compared with recent measurements. Encouraging results are obtained for both the cases of flows.
Źródło:
International Journal of Applied Mechanics and Engineering; 2015, 20, 4; 857-869
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis for kinematics of 5-DOF industrial robotic manipulator
Autorzy:
Manjaree, S.
Nakra, B. C.
Agarwal, V.
Powiązania:
https://bibliotekanauki.pl/articles/386276.pdf
Data publikacji:
2015
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
kinematic analysis
wrist
anfis
membership function
degree of freedom
analiza kinematyczna
nadgarstek
manipulator przemysłowy
robot przemysłowy
Opis:
This paper gives the kinematic analysis of a 5-DOF industrial robotic manipulator while considering wrist in motion. Analytical solutions have been obtained for forward kinematics and inverse kinematics to accurately position the end-effector of robotic manipulator in three dimensional spaces. For the first time, a hybrid neuro-fuzzy intelligent technique with two different membership functions has been studied and their performances are comparatively evaluated with analytical solutions. An experiment has been performed for a desired trajectory. It is seen that the results for the intelligent technique are reasonably in agreement with experiment. Also, the results obtained highlight the importance of selection of a particular membership function for robotic manipulators of industrial use.
Źródło:
Acta Mechanica et Automatica; 2015, 9, 4; 229-240
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zanthoxylum rhetsa (Roxb.) DC.: A Systemic Review of its Ethnomedicinal Properties, Phytochemistry and Pharmacology
Autorzy:
Maduka, Tochukwu Oluwatosin
Ikpa, Chiyere B. C.
Powiązania:
https://bibliotekanauki.pl/articles/1031428.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Phytochemistry
Rutaceae
Zanthoxylum rhetsa
biological activities
Opis:
Zanthoxylum rhetsa also known as Indian prickly ash belongs to the family of aromatic deciduous trees and shrubs, Rutaceae that grows in tropical and subtropical regions of the world. The local use of the plant in different part of the world cannot be over emphasized as it has been both as food, medicine and for pest control. In folk medicine, various parts of Zanthoxylum rhetsa are used for the treatment of dental caries, dizzyness and bloating, malaria, urinary diseases, rheumatism, diuretic, stomach ache and diarrhea. Secondary metabolites have been isolated from the roots, stem barks, and fruits. The plant contains Alkaloids, phenolics and terpenoids as the main constituents of the specie. The presence of those compounds gives base for the several biological activities of the plant such as antibacterial, anti-inflammatory, antinociceptive and antidiarrhea, antioxidant, cytotoxic, thrombolytic Activity and photoprotective properties. This review comprehensive study focused on knowledge regarding several ethnomedical uses of the plant, phytochemical constituents and biological activities of the plant.
Źródło:
World News of Natural Sciences; 2021, 37; 41-57
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Absorption Spectrum of Ni(II) Ions Doped in Lithium Sodium Potassium Sulphate Single Crystal
Autorzy:
Rama Kumar, R.
Venkata Reddy, B. C.
Powiązania:
https://bibliotekanauki.pl/articles/1933457.pdf
Data publikacji:
1995-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.40.-q
78.50.-w
Opis:
The optical absorption spectra of lithium sodium potassium sulphate doped Ni$\text{}^{2+}$ ions at 300 and 77 K was recorded. The observed bands are assigned as transitions from the ground state $\text{}^{3}$A$\text{}_{2g}$(F) to various excited triplet and singlet states of the Ni$\text{}^{2+}$ ion in octahedral symmetry. The splittings observed for the bands $\text{}^{3}$T$\text{}_{1g}$(F) and $\text{}^{3}$T$\text{}_{2g}$(F) at liquid nitrogen temperature have been explained as due to spin-orbit interaction. The oscillator strengths of the transitions were computed from the area under the curves. From a detailed analysis of the bands of the spectrum, the crystal field parameters B, C, Dq and ξ are evaluated.
Źródło:
Acta Physica Polonica A; 1995, 87, 6; 1023-1029
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The entrepreneurship in Poland and in Hungary : future entrepreneurs education perspective
Przedsiębiorczość w Polsce i na Węgrzech : perspektywa kształcenia przyszłych przedsiębiorców
Autorzy:
Illes, B. C.
Dunay, A.
Jelonek, D.
Powiązania:
https://bibliotekanauki.pl/articles/404980.pdf
Data publikacji:
2015
Wydawca:
Politechnika Częstochowska
Tematy:
entrepreneurship
Polska
Hungary
education of future entrepreneurs
przedsiębiorczość
Polska
Węgry
kształcenie przyszłych przedsiębiorców
Opis:
The development of entrepreneurship is the demand of contemporary economy and one of the priorities of economical development of every country. The key role in shaping and preparation of future entrepreneurs is played by education. The aim of the paper is indication of the development directions of education systems of future managers in Poland and Hungary. It was indicated that in order to ensure entrepreneurial effectiveness there should be realized in entrepreneurship education the goals connected with knowledge provision concerning the notion of the enterprise and to shape entrepreneurial mindset and entrepreneurial capability of students. The background of considerations is constituted by comparative analysis of entrepreneurial attitudes and perceptions in Poland and in Hungary.
Rozwój przedsiębiorczości to wymóg współczesnej gospodarki i jeden z priorytetów strategii rozwoju gospodarczego każdego państwa. Kluczową rolę w wychowaniu i przygotowaniu przyszłych przedsiębiorców odgrywa edukacja. Celem artykułu jest wskazanie kierunków rozwoju systemów kształcenia przyszłych menedżerów w Polsce i na Węgrzech. Wykazano, że aby zapewnić efektywność przedsięwzięć biznesowych należy w kształceniu przedsiębiorczości realizować cele związane z dostarczeniem wiedzy o istocie przedsiębiorstwa oraz kształtować nastawienie i zdolności studentów w kierunku przedsiębiorczości. Tłem rozważań jest analiza porównawcza postaw i postrzegania przedsiębiorczości w Polsce i na Węgrzech.
Źródło:
Polish Journal of Management Studies; 2015, 12, 1; 48-58
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Academic e-learning management with e-learning scorecard
Zarządzanie akademickim e-learningiem z zastosowaniem kart ocen e-learningu
Autorzy:
Jelonek, D.
Dunay, A.
Illes, B. C.
Powiązania:
https://bibliotekanauki.pl/articles/404779.pdf
Data publikacji:
2017
Wydawca:
Politechnika Częstochowska
Tematy:
e-learning scorecard
financial perspective
student perspective
internal process perspective
learning and growth perspective
karty wyników e-learning
perspektywa finansowa
perspektywa studenta
perspektywa procesu wewnętrznego
perspektywa uczenia się i wzrostu
Opis:
E-learning is becoming more and more popular form of students’ education. Universities should perceive it as one of their directions of development. The aim of the paper is to present the concept of using e-learning scorecard (eLSC) in the managemet of e-learning activity of the university. The project of e-learnig scorecard uses the academic e-learning experience of the Faculty of Management of CUT (Poland) and the Faculty of Economics and Social Sciences of SzIU (Hungary). The method allows for the complex investigation into the effects of the conducted activity and can be applied as a tool of management of the e-learning implementation, i.e. monitoring the achievement of goals. There are given the examples of aims of the conducted e-learning activity of the university in four perspectives applied in scorecard: financial, stakeholder’s, internal process and learning & growth. Furthermore, there are indicated the means of their implementation.
E-learning staje się coraz popularniejszą formą edukacji studentów. Uniwersytety powinny postrzegać ją jako jeden z kierunków rozwoju. Celem artykułu jest przedstawienie koncepcji wykorzystania e-learningowej karty wyników (eLSC) w zarządzaniu działalnością e-learningową uczelni. Projekt karty wyników e-learnigu wykorzystuje doświadczenie e-learningu akademickiego Wydziału Zarządzania PCz (Polska) oraz Wydziału Nauk Ekonomicznych i Społecznych SzIU (Węgry). Metoda pozwala na kompleksowe badanie efektów przeprowadzonej działalności i może być stosowana jako narzędzie zarządzania wdrożeniem e-learningu, tj. monitorowanie realizacji celów. Podano przykłady celów prowadzonej działalności e-learningowej uniwersytetu w czterech perspektywach stosowanych w karcie wyników: finansowej, interesariuszy, procesów wewnętrznych oraz uczenia się i rozwoju. Ponadto wskazano sposoby ich realizacji.
Źródło:
Polish Journal of Management Studies; 2017, 16, 2; 122-132
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bashkirian rugose corals from the Carboniferous Mattson Formation in the Liard Basin, northwest Canada - stratigraphic and paleobiogeographic implications
Autorzy:
Fedorowski, J.
Bamber, E.W.
Richards, B.C.
Powiązania:
https://bibliotekanauki.pl/articles/20117.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:
Colonies of the rugose corals Nemistium liardense sp. nov. and Heritschioides simplex sp. nov. were collected from limestone in the upper member of the Mattson Formation in the Liard Range in the Northwest Territories and are the only known identifiable coral species from the Mattson Fm. The Mattson Fm., deposited in the Liard Basin west of the syndepositional Bovie reverse fault, comprises sandstone with subordinate shale and carbonates deposited during several delta cycles. The close morphological similarity and identical mode of offsetting in N. liardense colonies from the Mattson Fm. and the allochthonous Stikine Terrane of British Columbia indicate they belong in the same species. This and the morphological similarity between H. simplex and the late Serpukhovian to early Bashkirian H. columbicum allow assignment of the coral-bearing part of the upper Mattson Fm. to Bashkirian Foraminiferal Biozone 20. Widespread occurrence of the genus Nemistium confirms open communication between the Liard Basin region and the western European and northern African seas.
Źródło:
Acta Palaeontologica Polonica; 2019, 64, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deployment of Antepsin (Sucralfate) as Corrosion Inhibitor of Mild Steel in H2SO4 Medium: Chemical and Electrochemical Studies
Autorzy:
Udeh, B. C.
Onukwuli, O. D.
Omotioma, M.
Powiązania:
https://bibliotekanauki.pl/articles/1839460.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antepsin
Corrosion
H2SO4
Inhibitor
Mild Steel
Opis:
This study presents the deployment of antepsin (sucralfate) as corrosion inhibitor of mild steel in H2SO4 medium. Chemical (gravimetric) and electrochemical (potentiodynamic polarization and electrochemical impedance spectroscopy) techniques were used in the corrosion control investigation. The antepsin drug was characterized by gas chromatography mass spectrophotometer (GCMS) and Fourier transform infrared (FTIR) spectroscopy. Effects of inhibitor concentration, temperature and time on weight loss, corrosion rate, inhibition efficiency and degree of surface coverage were examined. Thermodynamic and adsorption properties of the corrosion inhibition process were determined. Inhibition efficiency was optimized using central composite design tool of Design Expert software version 12. Potentiodynamic polarization and electrochemical impedance spectroscopy were employed to determine the type and effectiveness of the inhibitor. As a confirmatory test, scanning electron microscopy (SEM) was employed to examine the surface morphology of the mild steel samples. Analysis of the results showed that major constituents of antepsin include tetradecanoate, metronidazole, hexadecanoic acid, methyl ester and 11-octadecenoic acid. The predominant functional groups include; C=O stretch, C-H bend and symmetric and asymmetric =C-O-C. Adsorption of the molecules of antepsin on the surface of the mild steel was spontaneous and occurred in agreement with physical adsorption. A quadratic model adequately described the relationship between inhibition efficiency and corrosion control variables of concentration of the inhibitor, temperature and time. Optimum inhibition efficiency of antepsin was obtained as 86.75%. Chemical and electrochemical results agreed that antepsin is suitable for corrosion control of mild steel in H2SO4 solution. Antepsin acted as mixed-type inhibitor (controlled both cathodic and anodic reactions).
Źródło:
World News of Natural Sciences; 2021, 37; 117-134
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Report of Acarothrix palustris Bartsch (Acari: Halacaridae) from the Indian Ocean
Dane o występowaniu Acarothrix palustris Bartsch (Acari: Halacaridae) w Oceanie Indyjskim
Autorzy:
Chatterjee, T.
Guru, B.C.
Sorensen, M.V,
Powiązania:
https://bibliotekanauki.pl/articles/841766.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
Acarothrix palustris
halacarid mite
Acari
Halacaridae
mite
mangrove
taxonomy
Indian Ocean
Opis:
The present study reports a new distribution record for the halacarid mite Acarothrix palustris Bartsch, 1990 on mangrove pneumatophores from Goa, India. Earlier this species was known from Hong Kong and Singapore (West Pacific Ocean). The present report represents the first record of the species from the Indian Ocean.
Niniejsze badania wskazują nowe miejsca występowania Acarothrix palustris Bartsch, 1990 w zaroślach namorzynowych z okolic Goa (Indie). Wcześniej gatunek ten był znany z Hong Kongu i Singapuru (West Pacific Ocean). Niniejsza praca jest pierwszym doniesieniem o występowaniu tego gatunku w oceanie indyjskim.
Źródło:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica; 2013, 20
1230-3976
Pojawia się w:
Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cobalt-rich lithiophorite from the Precambrian Eastern Ghats manganese ore deposit of Nishikhal, south Orissa, India
Autorzy:
Rao, D. S.
Nayak, B. K.
Acharya, B. C.
Powiązania:
https://bibliotekanauki.pl/articles/2086547.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
Nishikhal
manganese ore
lithiophorite
mineral chemistry
Opis:
Fine-grained aggregates of lithiophorite are associated with cryptomelane, romanèchite, birnessite and graphite in the Precambrian Eastern Ghats manganese ore deposit of Nishikhal, south Orissa, India. High-cobalt lithiophorite is reported for the first time from the manganese ores. The mode of occurrence and the chemical composition of the lithiophorite are discussed. Along with manganese and aluminium, the lithiophorite contains appreciable quantities of CoO (1.59-8.56%) together with trace amounts of Cu, Ni, Zn, Ti, Ca, Mg, Na, K and P. The Nishikhal lithiophorite is a transition metal-rich lithiophorite.
Źródło:
Mineralogia; 2010, 41, 1/2; 11--21
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crustal motion in Bulgaria based on geological and GPS data
Autorzy:
Nakov, R.
Kotzev, V.
Burchfiel, B. C.
King, R. W.
Powiązania:
https://bibliotekanauki.pl/articles/225756.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
dane geologiczne
dane GPS
Bułgaria
Półwysep Bałkański
geological data
GPS data
Bulgaria
Balkan Peninsula
Źródło:
Reports on Geodesy; 2006, z. 5/80; 205-211
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of phytochemical composition and in vitro antioxidant potential of Cyathea latebrosa leaves
Autorzy:
Ikpa, Chinyere B. C.
Maduka, Tochukwu D. O.
Ikpa, Chinomnso Uzoamaka
Powiązania:
https://bibliotekanauki.pl/articles/1193436.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Characterization
Cyathea latebrosa
GC/MS analysis
Phytochemical
Treatment
antioxidant
in vitro
phytochemical composition
Opis:
Phytochemicals and antioxidant potentials of chloroform extract of leaves of Cyathea latebrosa have been investigated. The metabolites detected are Carbohydrates, starch, glycosides, saponins, alkaloids, tannins, flavonoids, sterols, terpenes, and polyuronides. Quantitative Phytochemical analysis gave alkaloid (0.08×102 ±0.02), saponins (0.16×102 ±0.02), tannin (0.11×102 ±0.01), flavonoid (0.16×102 ±0.01), and phenol (0.18×102 ±0.01). FT-IR (KBr) cm-1 analysis showed -NH-(3433.41 weak), -OH- (3851.01 sharp), -C-F (1408.8 strong) –SO-(1101.39) and Ar (1646.3 weak), GC/MS characterization revealed the extract contained [2-Aziridinylethyl]amine (70.7%), Benzeneethamine, 3-fluoro-β,5-dihydroxy-N-methyl (14.0%), N-Methyltaurine (10.7%) and (R)-(-)-2-Amino-1-propanol (3.15%). The presence of these compounds exposed the leaves as a potential remedy for alleviated cold, cancer, malaria and to regulate immune functions. At 400 µg/ml concentration the extract and ascorbic acid produced 54.34% and 96.02% antioxidant activity respectively. The FRAP values were significantly (p < 0.05) low than the value of ascorbic acid (2µ M). The plant extracts showed low antioxidant potential even on higher concentrations when compared to reference standard ascorbic acid.
Źródło:
World Scientific News; 2021, 157; 25-37
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tracking Late Jurassic ornithopods in the Lusitanian Basin of Portugal: Ichnotaxonomic implications
Autorzy:
Castanera, D.
Silva, B.C.
Santos, V.F.
Malafaia, E.
Belvedere, M.
Powiązania:
https://bibliotekanauki.pl/articles/2082160.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Iguanodontipodidae
Dinehichnus
Anomoepus-like
Kimmeridgian
Tithonian
Europe
Opis:
The Sociedade de História Natural in Torres Vedras, Portugal houses an extensive collection of as yet undescribed dinosaur tracks with ornithopod affinities. They have been collected from different Late Jurassic (Kimmeridgian–Tithonian) geological formations (Praia de Amoreira-Porto Novo, Alcobaça, Sobral, and Freixial) that outcrop along the Portuguese coast, and belong to two different sub-basins of the Lusitanian Basin (the Consolação and Turcifal sub-basins). Three main morphotypes can be distinguished on the basis of size, mesaxony and the morphology of the metatarsophalangeal pad impression. The minute to small-sized morphotype is similar to the Anomoepus-like tracks identified in other Late Jurassic areas. The small to medium-sized morphotype resembles the Late Jurassic–Early Cretaceous ichnotaxon Dinehichnus, already known in the Lusitanian Basin. Interestingly, these two morphotypes can be distinguished qualitatively (slightly different size, metatarsophalangeal pad impression and digit morphology) but are nevertheless difficult to discriminate by quantitatively analysing their length-width ratio and mesaxony. The third morphotype is considered a large ornithopod footprint belonging to the ichnofamily Iguanodontipodidae. This ichnofamily is typical for Cretaceous tracksites but the new material suggests that it might also be present in the Late Jurassic. The three morphotypes show a negative correlation between size and mesaxony, so the smaller tracks show the stronger mesaxony, and the larger ones weaker mesaxony. The Upper Jurassic ornithopod record from the Lusitanian Basin has yielded both small and medium-sized ornithopod remains, mainly iguanodontians such as dryosaurids and ankylopollexians, which are the main candidates to be the trackmakers.
Źródło:
Acta Palaeontologica Polonica; 2020, 65, 2; 399-412
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modern tillage and integrated nutrient management practices for improving soil fertility and productivity of groundnut (Arachis hypogaea L.) under rainfed farming system
Autorzy:
Patil, S.B.
B.C., Balakrishna Reddy
Chitgupekar, S.C.
Patil, B.B.
Powiązania:
https://bibliotekanauki.pl/articles/11868.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
The field experiment was conducted with four tillage and three nutrient management practices at Agronomy field unit, University of Agricultural Sciences, GKVK, Bangalore, Karnataka, India. The results of the study indicated that, higher groundnut pod yield (1307 and 1282 kg ha-1) and haulm yield (2733 and 2889 kg ha-1) was recorded with mechanical tillage + two intercultivations and integrated application of 50% organics and 50% inorganics, respectively as compared to rest of the treatments. Further, the same treatments noticed higher availability of N, P2O5 and K2O in soil after harvest of groundnut, but greater improvement in soil organic carbon content was observed with conventional tillage + one intercultivation (0.62%) as compared to rest of the tillage practices. The maximum net returns and benefit-cost ratio was recorded with mechanical tillage + two intercultivations (Rs. 11,287 ha-1 and 1.75, respectively) and integrated application of 50% organics + 50% inorganics (Rs. 10,462 ha-1 and 1.69, respectively). However, interaction effect of tillage and nutrient management practices were not influenced significantly on soil fertility and productivity of groundnut under rainfed farming system.
Źródło:
International Letters of Natural Sciences; 2015, 02
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Machining performance optimization of Parallel Kinematic Machines tools with regard to their anisotropic behaviour
Autorzy:
Pateloup, S.
Bonnemains, T.
Chanal, H.
Bouzgarrou, B. C.
Duc, E.
Ray, P.
Powiązania:
https://bibliotekanauki.pl/articles/1429122.pdf
Data publikacji:
2008
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
parallel kinematic machine too
kinematic model
static model
tool path optimization
Opis:
Today, Parallel Kinematic Machines tools (PKMs) appear in automotive and aeronautic industries. These machines allow a benefit of productivity due to their higher kinematics performances than Serial Kinematic Machines tools (SKMs). However, their machining accuracy is lower. Moreover, the compensation of the defects which penalizes the machined parts quality is difficult due to their anisotropic behaviour. Thus, this article deals with the development of methods improving the machined parts quality and the productivity. In order to improve parts quality, the static behaviour of the machine structure is considered with a model taking into account joints and legs compliances. Then, it allows determining a static workspace. About the productivity, the improvement of kinematics performances is performed through an optimization work of the non productive tool path between cutting operations. The computed tool path must verify a minimum time constraint and avoid collisions between the tool and the machined part. All the methods are illustrated with the PKM Tripteor X7 developed by PCI.
Źródło:
Journal of Machine Engineering; 2008, 8, 4; 13-24
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving environmental odor measurements : comparison of lab-based standard method and portable odor measurement technology
Autorzy:
Maurer, D. L.
Bragdon, A. M.
Short, B. C.
Ahn, H.
Koziel, J. A.
Powiązania:
https://bibliotekanauki.pl/articles/204983.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
odor
volatile organic compounds
air quality measurements
standardization
olfactometry
Opis:
Current standard odor measurement methods are lab-based and require substantial investment in hardware, sample collection, training, and maintenance. Odor samples must be collected in the field using bags and brought to the lab to test. This can be a time-consuming process, with the possibility of the sample loss. The actual odor measurements are based on dilution olfactometry, embodied in the AC’SCENT® International Olfactometer, following the ASTM E679-04 standard. In recent years a portable olfactometer, the Scentroid SM100i, has been developed for odor measurements. The portable olfactometer has many advantages over lab-based standard method, especially the lower cost-per-sample. However, very little is known about the performance and reliability of portable olfactometer where the dilutions are controlled with orifices in metallic plates. It is important to evaluate the Scentroid SM100i accuracy to determine the usefulness of using it as a comparable technology for odor measurements. The main objective of this research is to compare the performance of the lab-based ASTM E679-04 method with portable odor measurement technology. Specific objectives include: (1) determining the accuracy of the dilution ratios specified by the manufacturer of both the AC’SCENT International Olfactometer and the Scentroid SM100i; (2) comparing results between olfactometers using n-butanol, a commonly used standard gas in the olfactometry field, and (3) determining the accuracy of odor measurement using real odor samples collected from livestock farms in Iowa. The AC’SCENT olfactometer had an average percent error between the factory specifications and measured dilution ratios of 5.23% compared with 14.1% for Scentroid SM100i (using plate i-2 with dilution range most comparable to the AC’SCENT olfactometer). The use of other dilution plates resulted in average percent errors ranging from 9.68% to 25.31%. The Scentroid SM100i deviated from the manufacturer specifications for flowrates and dilution ratios, but these flowrates were generally consistent with each dilution setting. Overall, the Scentroid SM100i overestimated the odor concentrations with the mean difference of 22.9% (ranging from 0.95% to 93.34%). When the post-measurement adjustment using dilution correction was made, the mean percent average difference was 11.8%.
Źródło:
Archives of Environmental Protection; 2018, 44, 2; 100-107
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monitoring system for high speed wood machining processes
Autorzy:
Hoffmeister, H.-W.
Luig, M.
Wittmer, R.
Schuller, B.-C.
Strauss, H.
Biehl, S.
Powiązania:
https://bibliotekanauki.pl/articles/99458.pdf
Data publikacji:
2010
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
process monitoring
toolholder
piezoresistive thin film sensor
Opis:
The improvement of product quality as well as the increase of production efficiency is inevitable in modern manufacturing processes. In this regard an increased cutting speed causes dangerous process situations in respect to operator safety and machine damage. In addition to that wood working machines generally do not use process monitoring systems, e. g. tool breakage monitoring. The aim of this project was the development of a process monitoring system to increase safety in wood working processes. Therefore, the Institute of Machine Tools and Production Technology (IWF) and the Fraunhofer-Institute of Surface Engineering and Thin Films (FhG IST) developed a sensor-integrated tool holder, which is able to detect clamping forces and unbalances during the process. The hollow shank taper 'HSK-63-F' was chosen as tool holder as it is used in the majority of applications in wood working processes. The clamping and balance conditions are measured by an embedded piezo-resistive thin film sensor at the planar contact surface. To ensure a contact-free signal transmission a telemetric system was used. The interaction between this monitoring system and the machine control automatically activates an emergency stop. Hence, a system was developed which significantly increases the process safety during the run-up and the idle speed phase of the spindle.
Źródło:
Journal of Machine Engineering; 2010, 10, 2; 48-56
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bidirectionally stretched flow of Jeffrey liquid with nanoparticles, Rosseland radiation and variable thermal conductivity
Autorzy:
Archana, M.
Gireesha, B. J.
Rashidi, M. M.
Prasannakumara, B. C.
Gorla, R. S. R.
Powiązania:
https://bibliotekanauki.pl/articles/240409.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat mass transfer
jeffrey nanofluid
variable thermal conductivity
rosseland approximation
suction
ciepło
masa
zmienna przewodność cieplna
aproksymacja
ssanie
Opis:
Heat and mass transfer stretched flow of an incompressible, electrically conducting Jeffrey fluid has been studied numerically. Nanoparticles are suspended in the base fluid and it has many applications such as cooling of engines, thermal absorption systems, lubricants fuel cell, nanodrug delivery system and so on. Temperature dependent variable thermal conductivity with Rosseland approximation is taken into account and suction effect is employed in the boundary conditions. The governing partial differential equations are first transformed into set of ordinary differential equations using selected similarity transformations, which are then solved numerically using Runge-Kutta-Felhberg fourth-fifth order method along with shooting technique. The flow, heat and mass transfer characteristics with local Nusselt number for various physical parameters are presented graphically and a detailed discussion regarding the effect of flow parameters on velocity and temperature profiles are provided. It is found that, increase of variable thermal conductivity, radiation, Brownian motion and thermophoresis parameter increases the rate of heat transfer. Local Nusselt number has been computed for various parameters and it is observed that, in the presence of variable thermal conductivity and Rosseland approximation, heat transfer characteristics are higher as compared to the constant thermal conductivity and linear thermal radiation.
Źródło:
Archives of Thermodynamics; 2018, 39, 4; 33--57
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Professionals and Carpal Tunnel Syndrome (CTS)
Autorzy:
Ali, K. M.
Sathiyasekaran, B. W. C.
Powiązania:
https://bibliotekanauki.pl/articles/90158.pdf
Data publikacji:
2006
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
musculoskeletal disorders
cross-sectional study
occupational disorder
Tinel’s sign
Phalen’s sign
wrist
hand
body mass index
nadgarstek
ręka
praca a choroby
komputer
choroby narządów ruchu
pozycja przy pracy
choroba zawodowa
syndrom cieśni nadgarstka
Opis:
Carpal Tunnel Syndrome (CTS) is an important problem among computer professionals. Hence the prevalence of CTS among computer professionals and risk factors were studied. 648 subjects were selected from 4,276 computer professionals from 21 companies with a simple random sampling method. CTS was diagnosed based on clinical features.The prevalence of CTS was found to be 13.1% (95% CI 10.5–15.7%). Subjects with over 8 years of computer work, over 12 hrs of work per day and system administrators were at a higher risk for CTS (OR 3.3, 4.9 and 2.5 respectively). Flexed or extended hand position had higher risk for CTS. Higher risk for CTS was found with higher exposure to computer work. Ergonomic considerations are important in facilitating proper positioning of hand while working with a computer. Further studies on CTS risk factors among computer professionals are essential for planning prevention.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2006, 12, 3; 319-325
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Brain derived neurotrophic factor, a link of aerobic metabolism to neuroplasticity
Autorzy:
de Assis, G.G.
Gasanov, E.V.
de Sousa, M.B.C.
Kozacz, A.
Murawska-Cialowicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/70146.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Fizjologiczne
Tematy:
brain derived neurotrophic factor
central nervous system
neuronal plasticity
metabolic property
aerobic exercise
gene expression
Źródło:
Journal of Physiology and Pharmacology; 2018, 69, 3
0867-5910
Pojawia się w:
Journal of Physiology and Pharmacology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przejście do statusu zatrudnionego na pełny etat: analiza empiryczna z wykorzystaniem dwurównaniowego i trójrównaniowego modelu probitowego z endogenicznym przełączaniem
Autorzy:
A, Natalia N E H R E B E C K
Powiązania:
https://bibliotekanauki.pl/articles/701591.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Źródło:
Ekonomista; 2011, 2
0013-3205
2299-6184
Pojawia się w:
Ekonomista
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on physical-chemical characters and heritability for yield components in rice (Oryza sativa L.)
Autorzy:
Ha, P.T.T.
Khang, D.T.
Tuyen, P.T.
Minh, T.N.
Xuan, T.D.
Lang, N.T.
Buu, B.C.
Powiązania:
https://bibliotekanauki.pl/articles/11628.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
Present study was performed to analysis both physical and chemical properties of rice germplasm and heritability for yield components in combinations. A total of 44 lines/varieties obtained from Cuu Long Rice Research Institute genebank, and 30 F1 generation combinations were evaluated. The results showed that the rice line IR79008-B-11-B-B-1 showed overall good physical characters (head rice, grain length, grain width, chalkiness). In terms of chemical characteristics, three varieties IR75499-73-1-B, OM6162, and OM4900 were found to have good amylose content, gel consistency, protein content, gelatinization temperature, and aroma. A very notable finding was that the cross between OM6162/SwarnaSub1 that low amylose content (20.2%), high gel consistency (78.2 mm), high protein content (8.1%), appropriate gelatinization temperature (scale 5), low chalkiness (level 0), high heritability (0.9) for grain yield trait/cluster, and (0.84) for the number of panicles/cluster. Moreover these characters consist of plant height, panicle length, number of panicles/cluster, number of filled grains/panicle, number of unfilled/panicle, and grain yield/ cluster showed moderate to high heritability of mean for combination OM6162/SwarnaSub1. The results suggest that the grain yield trait/cluster and the number of panicles/cluster are important yield contributing traits to rice breeders for selecting ideal combinations for higher yield and quality of next generations.
Źródło:
International Letters of Natural Sciences; 2016, 57
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metric for calculation of system complexity based on its connections
Autorzy:
Paiva, J. R. B.
Gomes, V. M.
Rodrigues, B. A.
Silva, L. F. A.
Aniceto, B. C. M.
Furriel, G. P.
Calixto, W. P.
Powiązania:
https://bibliotekanauki.pl/articles/136166.pdf
Data publikacji:
2017
Wydawca:
EEEIC International Barbara Leonowicz Szabłowska
Tematy:
complexity
connections
modeling
simulation
discrete event systems
Opis:
This paper proposes a methodology based on system connections to calculate its complexity. Two study cases are proposed: the dining Chinese philosophers’ problem and the distribution center. Both studies are modeled using the theory of Discrete Event Systems and simulations in different contexts were performed in order to measure their complexities. The obtained results present i) the static complexity as a limiting factor for the dynamic complexity, ii) the lowest cost in terms of complexity for each unit of measure of the system performance and iii) the output sensitivity to the input parameters. The associated complexity and performance measures aggregate knowledge about the system.
Źródło:
Transactions on Environment and Electrical Engineering; 2017, 2, 1; 67-73
2450-5730
Pojawia się w:
Transactions on Environment and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of new drought tolerant breeding lines for Vietnam using marker-assisted backcrossing
Autorzy:
Thu Ha, P.T.
Khang, D.T.
Tuyen, P.T.
Toan, T.B.
Huong, N.N.
Lang, N.T.
Buu, B.C.
Xuan, T.D.
Powiązania:
https://bibliotekanauki.pl/articles/11519.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2016, 59
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlation among agro-morphological variation and genetic diversity of rice (Oryza sativa L.) under drought stress
Autorzy:
Thu Ha, P.T.
Khang, D.T.
Tuyen, P.T.
Minh, L.T.
Minh, T.N.
Thi Lang, N.
Buu, B.C.
Xuan, T.D.
Powiązania:
https://bibliotekanauki.pl/articles/11160.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
In this study, the correlation coefficients among agro-morphological variation, genetic diversity, and drought tolerance in 44 rice cultivars were analyzed. The drought tolerance at seeding stage (DTS) was significantly proportional to drought tolerance at vegetative stage (DTV) (r = 0.60). In addition, DTS and DTV had strong significant positive correlation to leaf roll (r = 0.87 and 0.54, respectively). Means of unfilled grains and tilling per panicle were proportionally correlated to DTS (r = 0.22 and 0.25, respectively), and DTV (r = 0.20 and 0.36, respectively). However, weight of 1000 grains and filled grains were recorded no correlation to DTS and DTV. At a homologous coefficient of 16.85 integrated from cluster analysis of agro-morphological, quantitative characteristics and drought tolerant scores, the rice cultivars were divided into five groups. Maximum polymorphic information content (PIC) values were detected in three markers including RM11125, RM21, and RM5629, which were from 0.78 to 0.79. Cluster analysis of microsatellite markers revealed that by a genetic distance of 0.63, the rice varieties were separated into three clusters. The results provide valuable information for rice breeders to select donors in breeding rice integrated with drought tolerance and good agronomic characteristics.
Źródło:
International Letters of Natural Sciences; 2016, 58
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of regulated drip irrigation on productivity and physicochemical traits of tomato ‘Tofane’ under hot desert climate
Autorzy:
Azzeddine, C.
Mostapha, B.B.
Houria, C.
Powiązania:
https://bibliotekanauki.pl/articles/1080131.pdf
Data publikacji:
2020
Wydawca:
Instytut Ogrodnictwa
Tematy:
tomato
Tofane cultivar
drip irrigation
desert
dry climate
physicochemical trait
productivity
fruit parameter
fruit yield
fruit quality
Opis:
The impact of regulated drip-irrigation on productivity and fruit quality of tomato ‘Tofane’ has been studied under a warm dry desert climate in southern Algeria. Yield, fruit weight and size, water content and parameters of fruit quality – total soluble solids, phenolic compounds, carotenoids, vitamin C, pH and titratable acidity were determined. Two irrigation treatments were applied in 2012 and 2013: T1, optimal irrigation (100% evapotranspiration – ETc) during the whole growth period (growth stages I, II and III); T2, optimal irrigation during I and II stages, and regulated deficit irrigation (67% ETc) during stage III (from fruit set to full fruit maturity of first and second bunch). T1 treatment during the whole season showed the highest values of soil water potential (Ψsoil), between −0.02 MPa and −0.06 MPa, on depths of 0.3 and 0.6 m, respectively. During stage III, regulated deficit irrigation caused the lowest Ψsoil values, which were between −0.1 MPa and −0.12 MPa on a soil depth of 0.3 and 0.6 m, respectively. Deficit irrigation caused significant decrease of water content in fruits and not significant decrease of fruit weight and size, as well as fruit yield while water saving for irrigation amounted to 10%. Comfort-irrigated tomato plants produced fruits containing significantly higher titratable acidity, total soluble solids and vit. C content. There was a tendency to decrease carotenoid content and increase phenolic content in both years of the study. Due to the possibility of water saving with not significant yield decrease, it seems that the reduction of water use in growth stage III would be an adequate strategy for tomato cultivation in hot, dry climate.
Źródło:
Journal of Horticultural Research; 2020, 28, 1; 93-100
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Helminth endo-parasites of amphibians from Greame Ama, Okrika, Rivers State, Nigeria
Autorzy:
Amuzie, C.C.
Robert, B.
Ekerette, I.B.
Powiązania:
https://bibliotekanauki.pl/articles/2049688.pdf
Data publikacji:
2020
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
helminth parasite
marine environment
parasite species
new parasite
endoparasite
Nigeria
amphibian diversity
Helminth parasites
Okrika
Opis:
There is only one survey on the species of amphibians and their parasites from Okrika, Rivers State, Nigeria. Therefore, this research was carried out with the intention of exploring the city for more amphibian species and also reporting on the parasites infecting them. Visual acoustic and survey methods were employed in surveying the study location, Greame Ama, for the period of September to November, 2018, and standard parasitological techniques were adopted. In comparison with the earlier research, fewer amphibian species were encountered: Sclerophrys maculata, Hoplobatrachus occipitalis, Ptychadena pumilio and P. mascareniensis. However, new parasite species were found: Diplodiscus fischthalicus, Metahaematoloechus exoterorchis and Cephalochlamys compactus. A higher prevalence of infection (96.6%) was reported here than in the earlier report. Of the nine parasite species reported in this research, three have direct transmission routes (Rhabdias sp., Cosmocerca ornata, Cylindrotaenia jaegerskioeldii), while six (Raillietiella sp., Cephalochlamys compactus, Mesocoelium monodi, D. fischthalicus, Metahaematoloechus exoterorchis and ascaridida larva) are transmitted by ingestion of either insect or gastropod intermediate hosts. However, the most prevalent species were those with direct transmission routes as is common with more terrestrial amphibian species. It is concluded that amphibian diversity in Okrika is low but more parasite species are likely to be reported with more surveys.
Źródło:
Environment, Earth and Ecology; 2020, 4, 1; 31-37
2543-9774
2451-4225
Pojawia się w:
Environment, Earth and Ecology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
What influences child dietary diversity? Empirical evidence from Sinda district of Eastern Zambia
Autorzy:
Mulenga, C.B.
Powiązania:
https://bibliotekanauki.pl/articles/43210.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane
Tematy:
human nutrition
diet
child
dietary diversity
food security
empirical evidence
Sinda district
Eastern Zambia
Zambia
Źródło:
Journal of Agribusiness and Rural Development; 2018, 50, 4
1899-5241
Pojawia się w:
Journal of Agribusiness and Rural Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magneto-rotatory compressible couple-stress fluid heated from below in porous medium
Autorzy:
Mehta, C. B.
Powiązania:
https://bibliotekanauki.pl/articles/178540.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
compressible couple-stress fluid
thermal convection
porous medium
rotation
magnetic field
Opis:
The study is aimed at analysing thermal convection in a compressible couple stress fluid in a porous medium in the presence of rotation and magnetic field. After linearizing the relevant equations, the perturbation equations are analysed in terms of normal modes. A dispersion relation governing the effects of rotation, magnetic field, couple stress parameter and medium permeability have been examined. For a stationary convection, the rotation postpones the onset of convection in a couple stress fluid heated from below in a porous medium in the presence of a magnetic field. Whereas, the magnetic field and couple stress postpones and hastens the onset of convection in the presence of rotation and the medium permeability hastens and postpones the onset of convection with conditions on Taylor number. Further the oscillatory modes are introduced due to the presence of rotation and the magnetic field which were non-existent in their absence, and hence the principle of exchange stands valid. The sufficient conditions for nonexistence of over stability are also obtained.
Źródło:
Studia Geotechnica et Mechanica; 2016, 38, 1; 55-63
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sustainable policies for the development of beekeeping in Romania
Autorzy:
Pocol, C.B.
Powiązania:
https://bibliotekanauki.pl/articles/572432.pdf
Data publikacji:
2011
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
sustainable policy
development
beekeeping
Romania
European Union
bee product
marketing
standard
Opis:
The present research aims to achieve a retrospective analysis of sustainable policies for the development of beekeeping in Romania, an important sector that contributes to the development of rural areas. Romanian’s objectives regarding the development of this sector are based on the adoption of a clear vision and on the support of state, materialised by the National Beekeeping Program. The assessment of the program implementation reveals the following aspect: in the analyzed period 2008- 2010, an improvement of the access to funds can be observed, the level of absorption increasing from 16.8% in 2008 to 99.8% in 2010. The consequences following the funds accession are an increase of associative forms and a restoration of beekeeping exploitations. Nevertheless, there are still problems in the North East regions of the country, due to lack of information regarding the accession to funds. These problems could be solved by creating a platform that should constantly reunite beekeepers, researchers and specialists of the sector that share their experience and skills, establishing a dialogue between all the actors in the beekeeping chain.
Źródło:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego; 2011, 11(26), 3
2081-6960
Pojawia się w:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soil strength of some Central Eastern Nigeria soils and effect of potassium and sodium on their dispersion
Autorzy:
Igwe, C.A.
Okebalama, C.B.
Powiązania:
https://bibliotekanauki.pl/articles/24225.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
sodium
physical property
linear extensibility
soil
coefficient
potassium
soil strength
Central-Eastern Nigeria
clay content
clay dispersion
Nigeria
Źródło:
International Agrophysics; 2006, 20, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Poakcesyjne zmiany w ofercie handlowej produktów na polskim rynku żywnościowym; przykład oliwy z oliwek
Post-accession changes in the product offer in the Polish food market; case study of olive oil
Autorzy:
Barszczewski, C.
Kowrygo, B.
Powiązania:
https://bibliotekanauki.pl/articles/572705.pdf
Data publikacji:
2011
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
Polska
rynek zywnosciowy
zmiany
oferty rynkowe
oliwa z oliwek
wielkosc produkcji
ceny
spozycie zywnosci
badania rynku
Opis:
Celem opracowanie jest przedstawienie, na przykładzie oliwy z oliwek, zmian w ofercie handlowej produktów na polskim rynku żywnościowym w następstwie akcesji Polski do UE. Źródłem informacji były dane wtórne i pierwotne. Te ostatnie pozyskano drogą badania rynkowego obejmującego osiem wybranych warszawskich placówek handlowych. Szczególnej ocenie poddano dostępny asortyment i jego ceny.
The aim of this paper was to display the post-accession to the EU changes in the product offer in the Polish food market. Two types of data were used: secondary and primary. Primary data were collected by own market survey, conducted in eight selected Warsaw stores. The special attention was paid to the available assortment and its prices.
Źródło:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego; 2011, 11(26), 1
2081-6960
Pojawia się w:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad zabezpieczeniem ran powstałych przy podkrzesywaniu gałęzi u topól
Issledovanija zashhity ranenijj voznikshikh pri podrezke vetvejj u topolejj
Studies on the protection of wounds inflicted by pruning poplars
Autorzy:
Kozlowska, C.
Szumowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/812914.pdf
Data publikacji:
1976
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1976, 120, 02
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie dwutlenku chloru w technologii uzdatniania wody dla Zielonej Góry
Application of Chlorine Dioxide in the Water Treatment Plant of Zawada Providing Potable Water for the City of Zielona Góra
Autorzy:
Jachimko, B.
Symonowicz, C.
Powiązania:
https://bibliotekanauki.pl/articles/236646.pdf
Data publikacji:
2003
Wydawca:
Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:
utlenianie
dezynfekcja wody
uzdatnianie wody
dwutlenek chloru
chlor
chlorine dioxide
chlorine
oxidation
disinfection
water treatment
Opis:
W pracy podsumowano doświadczenia związane z wdrożeniem dwutlenku chloru do utleniania pośredniego i dezynfekcji w stacji uzdatniania wody w Zawadzie, zaopatrującej w wodę Zieloną Górę. Instalacja do przygotowania i dawkowania dwutlenku chloru pracuje od 2000 r. Wprowadzenie reagenta na skalę techniczną poprzedzone było badaniami laboratoryjnymi, mającymi na celu określenie zapotrzebowania wody na dwutlenek chloru. W 2000 r. zbudowano tymczasową instalację do wytwarzania ClO2 z kwasu solnego i chlorynu sodu, która pracowała przez około 12 miesięcy, po czym uruchomiono instalację docelową wytwarzania dwutlenku chloru z chloru i chlorynu sodu. Obecnie do utleniania pośredniego wykorzystywane są dwutlenek chloru (0,3÷0,5 gClO2/m3) oraz chlor (ok. 1,8 gCl2/m3), natomiast do dezynfekcji wody stosuje się wyłącznie dwutlenek chloru (0,35÷0,6 gClO2/m3). Efektem zastosowania dwutlenku chloru była przede wszystkim poprawa właściwości organoleptycznych wody, a także obniżenie stężenia THM w wodzie uzdatnionej.
In 2000, a temporary system for ClO2 production from hydrochloric acid and sodium chlorite was established. After approximately 12 months of operation, it was replaced by another installation which produces ClO2 from chlorine and sodium chlorite and has been operated ever since. The ClO2 obtained in this way is used for intermediate oxidation (with 0.3 to 0.5 g/m3) and disinfection (with 0.35 to 0.50 g/m3). The benefits from the application of ClO2 were the improved organoleptic properties of the treated water, as well as the reduction of THM concentration in tap water.
Źródło:
Ochrona Środowiska; 2003, R. 25, nr 4, 4; 65-68
1230-6169
Pojawia się w:
Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The statistical models for interpreting the results of parcels area verification in integrated administration and control system IACS
Statystyczne modele interpretacji wyników weryfikacji powierzchni działek w programie IACS
Autorzy:
Wolski, B.
Toś, C.
Powiązania:
https://bibliotekanauki.pl/articles/402475.pdf
Data publikacji:
2018
Wydawca:
Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
Tematy:
IACS system
verification of parcel area
robust statistics
program IACS
weryfikacja powierzchni działek
statystyka odpornościowa
Opis:
A key element of the system IACS is the verification of the parcel area covered by direct subsidies. Control measurements are made by FOTO method, and in a small part by the direct inspection. Statistical methods are used in estimating the significance of differences. The results of such analysis are correct only when the empirical distributions are consistent with the theoretical ones. The problem of distribution adequacy is presented in the paper on the examples of three objects. The hypotheses about the possibility of using the commonly used distributions, and the appropriateness of the modification of the density curves were verified. By questioning the effectiveness of current methods of analysis, the authors point to the advantages of robust statistics. The cognitive effect of the analysis is to indicate the Laplace distribution as a statistical model of the analyzed differences. Research is concluded by proposal of post-control report that sums up relevant properties of the survey results.
Kluczowym elementem programu IACS (Integrated Administration and Control System) jest weryfikacja powierzchni działek objętych dopłatami bezpośrednimi. Pomiary kontrolne wykonywane są metodą FOTO, a w niewielkiej części w ramach inspekcji terenowej. W ocenie istotności różnic zastosowanie znajdują metody statystyczne. Wyniki takich analiz są poprawne pod warunkiem zgodności rozkładów empirycznych z teoretycznymi. Problem adekwatności rozkładów zaprezentowano w artykule na przykładzie trzech obiektów. Zweryfikowano hipotezę o możliwości wykorzystania powszechnie stosowanych rozkładów oraz zbadano zasadność modyfikacji krzywych gęstości. Poddając w wątpliwość efektywność stosowanych obecnie metod analizy, Autorzy wskazują na zalety metod statystyki odpornościowej. Poznawczym efektem analizy jest wskazanie rozkładu Laplace’a jako statystycznego modelu analizowanych różnic. Konkluzję badań stanowi propozycja raportu pokontrolnego zawierającego istotne właściwości wyników pomiaru.
Źródło:
Structure and Environment; 2018, 10, 1; 53-65
2081-1500
Pojawia się w:
Structure and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 828

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