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Wyświetlanie 1-15 z 142
Tytuł:
Comparative evaluation of the nutrient composition and phytochemical content of selected vegetables consumed in Nigeria
Autorzy:
Ukom, A.N.
Obi, J.A.
Powiązania:
https://bibliotekanauki.pl/articles/11113.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2018, 71
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Halide Ions Selectivity of Industrial Grade Anion Exchange Resin Auchlite A-378
Autorzy:
Singare, P. U.
Patange, A. N.
Powiązania:
https://bibliotekanauki.pl/articles/412220.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
selectivity
ion exchange reactions
halide ions
industrial grade resins
anion exchange resins
enthalpy
equilibrium constant
Auchlite A-378
Opis:
The thermodynamic approach was applied to predict the trend selectivity of industrial grade anion exchange resin Auchlite A-378 in chloride form towards iodide and bromide ions in the solution. The study was conducted by performing the Clˉ/Iˉ and Clˉ/Brˉ uni-univalent ion exchange reactions under gradually increasing temperature conditions. The thermodynamic equilibrium constants K values were used to calculate the enthalpies of the two uni-univalent ion exchange reactions. It was observed that the K values for Clˉ/Iˉ ion exchange reaction were higher than Clˉ/Brˉ exchange reaction under identical experimental conditions. Also the enthalpy values for the two uni-univalent ion exchange reactions were calculated as -39.51 and -18.38 kJ/mol respectively. The high K and low enthalpy values obtained for Clˉ/Iˉ ion exchange reaction is responsible for higher selectivity of the resin towards iodide ions as compared to that towards bromide ions, when both the ions are present in the same solution.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 11, 1; 44-50
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on Halide Ions Selectivity of Nuclear Grade Anion Exchange Resin Auchlite ARA-9366
Autorzy:
Singare, P. U.
Patange, A. N.
Powiązania:
https://bibliotekanauki.pl/articles/412305.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
selectivity
ion exchange reactions
halide ions
nuclear grade resins
anion exchange resins
enthalpy
equilibrium constant
Auchlite ARA-9366
Opis:
The selectivity behaviour of nuclear grade anion exchange resin Auchlite ARA-9366 in chloride form towards iodide and bromide ions in the solution was studied. The trend in selectivity of the resin was predicted on the basis of thermodynamics of Clˉ/Iˉ and Clˉ/Brˉ uni-univalent ion exchange reactions. It was observed that the equilibrium constants K values for Clˉ/Iˉ ion exchange reaction were higher than that calculated for Clˉ/Brˉ exchange under identical experimental conditions. Also the enthalpy values for the two uni-univalent ion exchange reactions were calculated as -47.87 and -36.14 kJ/mol respectively. The high K and low enthalpy values obtained for Clˉ/Iˉ ion exchange reaction as compared to that obtained during Clˉ/Brˉ exchange supports higher selectivity of the resin towards iodide ions as compared to that towards bromide ions, when both the ions are present in the same solution.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 11, 1; 67-73
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ion-exchange reaction thermodynamics to study the selectivity behaviour of nuclear and non-nuclear grade anion exchange resins
Autorzy:
Singare, P. U.
Patange, A. N.
Powiązania:
https://bibliotekanauki.pl/articles/412083.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ionic selectivity
uni-univalent exchange
thermodynamic equilibrium constant
enthalpy
nuclear grade ion exchange resin
Auchlite ARA-9366
Auchlite A-378
Opis:
In the present investigation, attempts were made to understand the difference in bromide ion selectivity of the two closely related anion exchange resins Auchlite ARA-9366 and Auchlite A-378 in chloride form. The selectivity difference was predicted based on the thermodynamic equilibrium constants and enthalpy values of Clˉ/Brˉ ion exchange reactions performed by using the two resins. During Clˉ/Brˉ exchange reactions, with rise in temperature from 30.0 °C to 45.0 °C, the equilibrium constant (K) values were observed to decreases from 8.15x10-2 to 6.06x10-2 for Auchlite ARA-9366 resins and from 2.16x10-2 to 1.10x10-2 for Auchlite A-378 resins. The decrease in K values with rise in temperature, indicate exothermic ion exchange reactions having enthalpy values of -36.14 and -18.38 kJ/mol respectively. The high K and low enthalpy values obtained for Auchlite ARA-9366 resins indicate their greater selectivity for the bromide ions in the solution as compared to Auchlite A-378 resins.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 6; 8-15
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamics of Ion-exchange reaction in predicting the ionic selectivity of Auchlite ARA-9366 and Auchlite A-378 anion exchange resins
Autorzy:
Singare, P. U.
Patange, A. N.
Powiązania:
https://bibliotekanauki.pl/articles/412499.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ionic selectivity
uni-univalent exchange
thermodynamic equilibrium constant
enthalpy
nuclear grade ion exchange resin
Auchlite ARA-9366
Auchlite A-378
Opis:
The paper deals with predicting the iodide ion selectivity of nuclear and non-nuclear grade anion exchange resins. The ionic selectivity prediction was made on the basis of thermodynamic data of Clˉ/I ˉ ion exchange reaction. It was observed that with rise in temperature from 30.0 °C to 45.0 °C, the equilibrium constant (K) values were observed to decreases from 59.77x10-2 to 23.77x10-2 for Auchlite ARA-9366 resins and from 9.01x10-2 to 4.05x10-2 for Auchlite A-378 resins. The decrease in K values with rise in temperature, indicate exothermic ion exchange reactions having enthalpy values of -47.87 and -39.51 kJ/mol respectively. The high K and low enthalpy values obtained for Auchlite ARA-9366 resins indicate their greater selectivity for the iodide ions in the solution as compared to Auchlite A-378 resins, when both the resins are present in chloride form.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 6; 1-7
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges and prospects of contraceptives use among women attending family planning services in Yobe State, Nigeria
Autorzy:
Imam, Mohammed A. N. A.
Khan, Bhola
Powiązania:
https://bibliotekanauki.pl/articles/1075579.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Challenges
Contraceptives
Family Planning
Prospects
Services
Opis:
The study focuses on the challenges and prospects of contraceptive use among the women attending family planning services in Potiskam general hospital. The main objective of this study is to identify the major challenges facing the ideal use of the best contraceptive methods among women and to address the available prospects to be adapted in order to contribute for the improvement of family planning services in Yobe State. The population of the to study comprises of one hundred women attending family planning services in Potiskam General Hospital, and Sample size technique adopted using Krejcie and Morgan formula. The structured questionnaire was used to collect data for this study. The data obtained were analyzed by using mean and standard deviation. The findings of the study revealed that the fear of health risk, Lack of consensus among partners, Cultural norms and Religious are considered as the main challenges prevent family planning practice among women mainly the use of contraceptive methods. The findings also revealed that, the use of withdrawal (Coitus Interrupts), the use of Oral Contraceptives (The Pills) method, the use of Female and male Condoms is some of the common methods of family planning devices among women in study area. Finally, the results indicated that, the use of mass media campaign to educate women about family planning devices, use of symbols to display appropriate family planning equipment’s for women and use of guidance and counseling in Primary Health Care to educate women about family planning devices are some of the available prospects and solutions to be adopted for effective promoting family planning services in general and use of contraceptives in particular among women. It is recommended among others that, there is need for government through the Ministry of Health and its partners to revive and support family planning education to both household and community level.
Źródło:
World Scientific News; 2019, 122; 122-132
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustical studies on molecular interaction of 1,3,4-pyrazoline derivatives using ultrasonic technique at 303.15 K
Autorzy:
Santhi, A. R. N.
Powiązania:
https://bibliotekanauki.pl/articles/412461.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Binary mixture
molecular interaction
ultrasonic velocity
density
viscosity
free length
Opis:
The acoustical parameters for the binary liquid mixtures containing Pyrazoline derivatives in DMF have been estimated at 303.15 K, from the measured values of ultrasonic velocity (U), density (ρ) and viscosity (η). From these data some of acoustical parameters such as adiabatic compressibility (β), free length (Lf), acoustic impedance (Z), Rao’s constant (R), molar compressibility (W), relaxation time (τ), free volume (Vf) and internal pressure (πi), etc., have been computed using the standard relations. The results have been discussed in terms of molecular interactions.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 20, 1; 100-115
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Data Analysis and Presentation for Population Dynamics of Cotugnia sp. Parasitizing Domestic Fowl
Autorzy:
Jadhav, A. N.
Bhure, D. B.
Nanware, S. S.
Powiązania:
https://bibliotekanauki.pl/articles/1186744.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Computer aided Techniques
Cotugnia
Domestic Fowl
Gallus gallus domesticus
Nanded
Population Dynamics
Opis:
Goal of this paper is to present the techniques of Data Analysis and Presentation for population dynamics of Cestode parasite Cotugnia sp. parasitizing domestic fowl Gallus gallus domesticus from different localities of Nanded District (M.S.) India during October, 2014 to September, 2015. High incidence, density and index of infection were reported in Summer followed by Winter whereas infection was low in monsoon.
Źródło:
World Scientific News; 2016, 32; 24-35
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence and Diversity of Cestode Parasites of Freshwater Fishes of Genus Channa Scopoli, 1777
Autorzy:
Bhure, D. B.
Nanware, S. S.
Jadhav, A. N.
Powiązania:
https://bibliotekanauki.pl/articles/1191369.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Cestode parasites
Channa Scopoli
Diversity
Nanded District
Prevalence
Opis:
Study was conducted to investigate prevalence and diversity of Piscean cestode parasites of freshwater fishes of four species of the genus Channa Scopoli, 1777 viz. Channa straitus (Bloch,1793), Channa punctatus (Bloch, 1793), Channa marulius (F. Hamilton, 1822) and Channa gachua (F. Hamilton, 1822) in and around Nanded district, M.S. India during March, 2012 to August, 2014 by applying statistical approach. Five cestode genera Senga (Dollfus, 1934), Polyoncobothrium (Diesing, 1854), Gangesia (Woodland, 1924), Proteocephalus (Weinland, 1858) and Silurotaenia (Nybein, 1942) were recorded during this investigation. High prevalence were recorded during Summer followed by winter where as prevalence was low in monsoon. High prevalence was reported due to infection of Senga sp., as compared to other cestode infection. Prevalence of these Cestode parasites and severity of infection vary considerably depending on environmental conditions such as humidity, temperature, rainfall, vegetation and management practices.
Źródło:
World Scientific News; 2016, 33; 15-26
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the effect of planting distance and harvesting time on the carotenoids and phytochemicals of selected orange-fleshed sweet potato varieties
Autorzy:
Kalu, O.O.
Ojimelukwe, P.C.
Ukom, A.N.
Powiązania:
https://bibliotekanauki.pl/articles/11369.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2017, 66
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustical studies of binary liquid mixtures of p-chlorotoluene in benzene at different temperatures
Autorzy:
Kumar, G. P.
Babu, Ch. P.
Samatha, K
Jyosthna, A. N.
Showrilu, K.
Powiązania:
https://bibliotekanauki.pl/articles/412275.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ultrasonic velocity
thermodynamic parameters
p-chlorotoluene
molecular interactions
Opis:
Ultrasonic velocities (U), densities (ρ), and coefficient of viscosities (η) are measured for binary mixtures containing (i) p-chlorotoluene and (ii) benzene at 303.15 K, 308.15 K, 313.15 K and 318.15 K to understand the molecular interaction. Various acoustical parameters such as adiabatic compressibility (βad), free length (Lf), acoustic impedance (Z), free volume (Vf), molar volume (Vm), Rao’s constant (R), Wada’s constant (W) and internal pressure (πi), are calculated from the measured values of U, ρ, and η. The trend in acoustical parameters also substantiates to asses strong molecular interactions.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 10; 25-37
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of ascorbic acid foliar spray and seed treatment with cyanobacteria on growth and yield component of sunflower plants under saline soil conditions
Autorzy:
Abdel-Hafeez, A-N.A.A.
El-Mageed, T.A.A.
Rady, M.M.
Powiązania:
https://bibliotekanauki.pl/articles/10863.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Źródło:
International Letters of Natural Sciences; 2019, 76
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water quality challenges and impact
Autorzy:
Obilonu, A.N.
Chijioke, C.
Igwegbe, W.E.
Ibearugbulem, O.I.
Abubakar, Y.F.
Powiązania:
https://bibliotekanauki.pl/articles/11787.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
water quality
water body
environment pollution
prevention
treatment
challenge
impact
waste water
acid rain
fish
sediment
pollutant
Opis:
Man’s activities on the environment often results in pollution and degradation of water bodies. Water bodies must therefore be jealously guided and protected from being polluted, which will affect water quality and availability for desired usage. Causes of water quality impairment are urban and rural storm water runoff, inadequate waste water treatment, nutrient entrophication, atmospheric deposition and acid rain, pollutant in sediments and fish, and nuisance aquatic weed growth and invasive species. Other factors include unhygienic disposal and inadequate treatment of human and livestock wastes, indecent management and treatment of industrial residues, inappropriate agricultural practices and unsafe solid waste discharge. Suggested strategies to combat water quality problems which should form the basis of policy solution for improving water quality include: (i) prevention of pollution; (ii) treatment of polluted water; (iii) safe use of waste water; and (iv) restoration and protection of ecosystem. It is recommended that our water bodies and the environment in general should be protected through appropriate legislation guidelines and public literacy campaign and mass education to sensitize, educate and make the people a fully environmentally literate society. Taking these steps internationally, nationally and locally will mean better water quality for our present society and future generation.
Źródło:
International Letters of Natural Sciences; 2013, 04
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Primates Associated with Crop Raiding Around Borgu Sector of Kainji Lake National Park, Nigeria
Autorzy:
Adeola, A. J.
Ibrahim, A. O.
Adeola, A. N.
Alaye, S. A.
Akande, O. A.
Powiązania:
https://bibliotekanauki.pl/articles/1112666.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Borgu sector
Chlorocebus aethiops
Community and Kainji Lake National Park
Erthrocebus patas
Papio anubis
Primates
Raiding
Opis:
Crop raiding activities of primates around Kainji Lake National Park (Borgu Sector), Nigeria was investigated with the use of questionnaires, complemented with field survey focus group discussions and in-depth interviews. One hundred (100) questionnaires were administered to representatives of households in four selected support zone villages. Group discussions were then conducted in the villages. Data collected were analyzed using descriptive statistics in the form of percentages, frequencies and charts. We found that crop raiding and animal depredation were sources of conflict in Kainji Lake National Park (Borgu Sector). The primates raiding farmlands identified by the farmers were Olive Baboon (Papio anubis), Patas monkey (Erthrocebus patas), green monkey (Chlorocebus aethiops) and other primates that could not be identified by the farmers. The largest percentage of raiding (40%) was perpetrated by Papio anubis, followed by Patas monkey (35%) and the least by Green Monkey (2%). The result showed that maize was the most commonly ranked crop of seasonal harvest that was lost. Moreover, an estimated 3-5 50 kg bags of seed were being destroyed in the planting season. The most effective strategy the local communities used in preventing crop damage was watch guarding (70%). Other methods were fencing (60%), hunting (45%), scare crow (36%) and toxic chemical (5%). The mitigation measure advocated by nearly all respondents (57%) was the killing of destructive wildlife species, irrespective of conservation significance. Measures must put in place to educate these communities about wildlife conservation and to prevent wanton killing. The communities should also be compensated for their loss, as this will lead to positive attitudes to wildlife conservation.
Źródło:
World News of Natural Sciences; 2018, 18, 2; 223-231
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The changing shape of a liquid drop in an electric field
Autorzy:
Jayalal, A. A. S. N.
Wijewardena Gamalath, K. A. I. L.
Powiązania:
https://bibliotekanauki.pl/articles/411766.pdf
Data publikacji:
2012
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
gęstość ładunku powierzchniowego
stała dielektryczna
kąt stożka
napięcie powierzchniowe
minimalne pole elektryczne
surface charge density
dielectric constant
cone angle
surface tension
minimum electric field
Opis:
An approximate extension of the slender body theory was used to determine the static shape of a conically ended dielectric fluid drop in an electric field. Using induced surface charge density, hydrostatic pressure and the surface tension of the liquid with interfacial tension stresses and Maxwell electric stresses, a governing equation was obtained for Spender geometries for the equilibrium configuration and numerically solved for 3D. For an applied electric field, the electric energy on a spherical drop can be maximized in a weak dielectric by increasing the applied electric field. The minimum dielectric constant ratio needed to produce a conical end is 14.5 corresponding to a cone angle 31.25° .There is a sharp increment of the aspect ratio after reaching the threshold value of the applied field strength and the deformation of the fluid drop increases with the increase in dielectric constant of the fluid drop. For a particular dielectric constant ratio, the threshold electric field producing conical interface increases with the increased surface tension of the liquid. The threshold electric field for a water drop is 1.0854×104 units and the corresponding aspect ratio is 15. For the minimum dielectric ratio the cone angle of the drop decreases with applied field making the drop more stable at higher fields.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2012, 3; 24-40
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 142

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