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    Wyświetlanie 1-13 z 13
    Tytuł:
    Deforestation and its impacts on climate change an overview of Pakistan
    Autorzy:
    Ali, A.
    Riaz, S.
    Iqbal, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/11968.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    climate change
    deforestation
    Pakistan
    catastrophic event
    forest age
    natural factor
    weather
    industrialization
    urbanization
    global temperature
    surface temperature
    disaster
    South Asia
    Opis:
    Forests are one the main natural factors that regulate and determine climate, weather patterns and amount of CO2 of an area. With rapid industrialization and rapid urbanization there is a significant increase in deforestation and as a consequence rise in global mean surface temperatures. Rapid and unchecked cut down of forest cover has resulted in some of the worst disasters during the last decades. This paper focuses on studying the role of deforestation, its influence on climate change phenomena and its consequences in Pakistan.
    Źródło:
    Papers on Global Change; 2014, 21
    2300-8121
    1730-802X
    Pojawia się w:
    Papers on Global Change
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vasodilating, spasmolytic, inotropic and chronotropic activities of curcuminoids from Curcuma longa in isolated organ preparations of guinea pigs
    Autorzy:
    Jamil, Q.U.A.
    Iqbal, S.M.
    Jaeger, W.
    Studenik, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/69618.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Fizjologiczne
    Tematy:
    Curcuma longa
    curcumin
    demethoxycurcumin
    bisdemethoxycurcumin
    chemical structure
    spasmolytic activity
    guinea pig
    vasodilation
    pulmonary artery
    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:
    Impact of natural and synthetic plant stimulants on Moringa seedlings grown under low-temperature conditions
    Autorzy:
    Batool, S.
    Khan, S.
    Basra, S.M.
    Hussain, M.
    Saddiq, M.S.
    Iqbal, S.
    Irshad, S.
    Hafeez, M.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/11121.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:
    Open-Loop Control for Focusing of Neutral Particles by Modulated Optical Field
    Autorzy:
    Borisenok, S.
    Iqbal, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812039.pdf
    Data publikacji:
    2008-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.50.-p
    02.30.Yy
    Opis:
    We propose open-loop control model of focusing cooled quantum particles in 1D and 2D modulated optical field. Applying Kapitza's procedure of averaging, we demonstrate that the type of attractor in the fixed points can be controlled by changing the parameters of control optical field. We support our conclusions by simulation for harmonic control.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 4; 751-759
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Leaching of manganese ores using corncob as reductant in H2SO4 solution
    Autorzy:
    Ali, S.
    Iqbal, Y.
    Farooq, U.
    Ahmad, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/110165.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    siliceous manganese ore
    characterization
    leaching
    corncob
    H2SO4
    Opis:
    In this study, corncob was used as reductant for sulfuric acid leaching of manganese ore from Daweezi, Upper Mohmand Agency, Pakistan. X-ray diffraction of representative powdered samples revealed the presence of manganese silicate MnSiO(SiO4), calcite (CaCO3), and -quartz (SiO2). X-ray diffraction and energy dispersive spectroscopy analyses indicated that the examined manganese ore was siliceous in nature. Three process parameters were investigated in the present study including the particle size of the ore, leaching temperature, and amount of corncob. Manganese extraction of 92.48 wt% was achieved for a leaching time of 60 min at 90 oC using 1.9 mol/dm3 H2SO4 concentration and 4 g of corncob. The present results demonstrated that corncob is a low cost, renewable, and non-hazardous reducing agent for manganese leaching under mild acid conditions in comparison to the other available reagents.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 1; 56-65
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analyzing sectorial level determinants of inward foreign direct investment (FDI) in ASEAN
    Analiza określenia poziomu sektora bezpośredniej inwestycji zagranicznej (BIZ) w ASEAN
    Autorzy:
    Abdul Hadi, A. R.
    Zafar, S.
    Iqbal, T.
    Zafar, Z.
    Iqbal Hussain, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/404768.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    foreign direct investment
    panel data
    sectorial foreign direct investment
    ASEAN economies
    bezpośrednie inwestycje zagraniczne
    dane panelowe
    sektorowe bezpośrednie inwestycje zagraniczne
    gospodarki ASEAN
    Opis:
    The paper studies economic determinants of sectorial level (Extractive sector, manufacturing and assembly sector, infrastructure sector and service sector) foreign direct investment (FDI) to six ASEAN countries (Malaysia, Indonesia, Singapore, Thailand, Vietnam and Philippine). The study covers over a period of sixteen years, from 2001 to 2016, by employing static panel data model. This study includes inflation, gross domestic product growth, government expenditure on education, electric power consumption, exchange rate, trade openness and lending interest rate as economic variables. These factors are based on their relative importance from previous empirical literature. Overall findings reveal that there is a mix result in terms of key determinants of sectorial level inward FDI which proves that FDI is not a single phenomenon and that each sector must be treated on its own terms to attract FDI into the country.
    W artykule przedstawiono uwarunkowania gospodarcze na poziomie sektorowym (sektor wydobywczy, sektor produkcji i montażu, sektor infrastruktury i sektor usług) bezpośrednich inwestycji zagranicznych (BIZ) dla sześciu krajów ASEAN (Malezja, Indonezja, Singapur, Tajlandia, Wietnam i Filipiny). Badanie obejmuje okres szesnastu lat, od 2001 do 2016 r., poprzez zastosowanie statycznego modelu danych panelowych. Badanie to obejmuje inflację, wzrost produktu krajowego brutto, wydatki rządowe na edukację, zużycie energii elektrycznej, kurs walutowy, otwartość handlową i oprocentowanie kredytu jako zmienne ekonomiczne. Czynniki te opierają się na ich względnej wadze z poprzedniej literatury empirycznej. Ogólne wyniki wskazują, że istnieje mieszany wynik pod względem kluczowych czynników wpływających na napływ BIZ na poziomie sektorowym, co dowodzi, że bezpośrednie inwestycje zagraniczne nie są pojedynczym zjawiskiem i że każdy sektor musi być traktowany na własnych warunkach w celu przyciągnięcia bezpośrednich inwestycji zagranicznych do tego kraju.
    Źródło:
    Polish Journal of Management Studies; 2018, 17, 2; 7-17
    2081-7452
    Pojawia się w:
    Polish Journal of Management Studies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Comparative Assessment of the Impact of Different Occupations on Workers’ Static Musculoskeletal Fitness
    Autorzy:
    Chandra, A. M.
    Ghosh, S.
    Iqbal, R.
    Sadhu, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/90250.pdf
    Data publikacji:
    2007
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    occupations
    repetitive movements
    static muscular forces
    musculoskeletal disorders
    dynamometry
    Opis:
    An ergonomic assessment of the involvement of static muscular forces like back strength, grip strength and pinch strength in different occupations was made. A study was conducted on 45 normal adult males (15 subjects per group) which included video display terminal (VDT) operators, industrial workers and safety inspectors. Their maximum back strength, handgrip strength and pinch strength were measured with dynamometers. The observed values of back strength were significantly lower in VDT operators while significantly higher in safety inspectors and moderate in industrial workers. The values of grip strength and pinch strength of all sample groups were more or less similar. The findings clearly indicate that static muscular strength varies significantly in different occupations. Heavy static muscular load might lead to an accumulation of metabolic waste and toxins on the back resulting in lower back strength in VDT operators and industrial workers.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2007, 13, 3; 271-278
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Exercise and Heat-Load on Simple Reaction Time of University Students
    Autorzy:
    Chandra, A. M.
    Ghosh, S.
    Barman, S.
    Iqbal, R.
    Sadhu, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/89834.pdf
    Data publikacji:
    2010
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    reaction time
    exercise
    heat stress
    cognitive performance
    Opis:
    Visual and auditory simple reaction times for both right and left hands of young university male students were recorded with a simple reaction timer, before and after an exercise schedule without and with elevated temperatures in a climatic chamber. The results indicated a decrease in both visual and auditory reaction times after the exercise, but a marked increase in them was noticed when exercise was performed at elevated temperatures. The difference in reaction times in preferred and nonpreferred hands was negligible at rest, i.e., without any exercise and elevated temperature. However, the difference was significant when exercise was performed at elevated temperatures. Visual reaction time was longer than auditory reaction time in all conditions. The results suggest that in hot industries, increased temperature has a specific rather than general effect on cognitive processes, perception and attentiveness, leading to increased chances of human errors, fatal accidents and loss of productivity.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2010, 16, 4; 497-505
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review of computer codes for modeling corrosion product transport and activity build-up in light water reactors
    Autorzy:
    Rafique, M.
    Mirza, N. M.
    Mirza, S. M.
    Iqbal, M. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/148648.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    corrosion product
    light water reactors
    fuel cladding
    radiation field
    Opis:
    The corrosion products are among the leading sources of radiation in primary coolant circuits of pressurized water reactors leading to prolongation of reactor down-time for routine maintenance entailing substantial loss of revenues. These deposits affect adversely coolant flow rates resulting in elevation of fuel and cladding temperature and become activated by high neutron flux in reactor core consequently creating high radiation field by accumulating in the out-of-core reactor components. In the case of light water reactors (LWRs), prevailing corrosion products include 59Fe, 99Mo, 56Mn, 58Co, and 60Co. The 56Mn is the leading corrosion product activity source during operation while cobalt isotopes dominate the activity after reactor shutdown. This paper presents a detailed discussion on some computer codes developed for prediction and transport of corrosion product activity in LWRs.
    Źródło:
    Nukleonika; 2010, 55, 3; 263-269
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heat shock increases oxidative stress to modulate growth and physico-chemical attributes in diverse maize cultivars
    Autorzy:
    Hussain, I.
    Ashraf, M.A.
    Rasheed, R.
    Iqbal, M.
    Ibrahim, M.
    Ashraf, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/25486.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    The present investigation was conducted to appraise the physiochemical adjustments in contrasting maize cultivars, namely, PakAfgoi (tolerant) and EV-5098 (sensitive) subjected to heat shock. Seven-day-old seedlings were exposed to heat shock for different time intervals (1, 3, 6, 24, 48 and 72 h) and data for various physiochemical attributes determined to appraise time course changes in maize. After 72 h of heat shock, the plants were grown under normal conditions for 5 d and data for different growth attributes and photosynthetic pigments recorded. Exposure to heat shock reduced growth and photosynthetic pigments in maize cultivars. The plants exposed to heat shock for up to 3 h recovered growth and photosynthetic pigments when stress was relieved. A time course rise in the relative membrane permeability, hydrogen peroxide (H2O2) and malondialdehyde contents was recorded particularly in the EV-5098 indicating that heat shock-induced oxidative stress. Activities of different enzymatic antioxidants greatly altered due to heat shock. For instance, an increase in superoxide dismutase activity was recorded in both maize cultivars. The activity of ascorbate peroxidase was greater in Pak-Afgoi. However, the peroxidase and catalase activities were higher in plants of EV-5098. Heat shock caused a significant rise in the proline and decline in the total free amino acids. Overall, the performance of Pak-Afgoi was better in terms of having lesser oxidative damage and greater cellular levels of proline. The results suggested that oxidative stress indicators (relative membrane permeability, H2O2 and malondialdehyde) and proline can be used as markers for heat shock tolerant plants.
    Źródło:
    International Agrophysics; 2016, 30, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An investigation of 2013 Mw 7.7 Awaran earthquake, Pakistan
    Autorzy:
    Mahmood, I.
    Iqbal, M.F.
    Mughal, M.R.
    Shahzad, M.I.
    Tariq, S.
    Ullah, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/11915.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Źródło:
    International Letters of Natural Sciences; 2017, 61
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of pre-sowing magnetic field doses through RSM in pea
    Autorzy:
    Iqbal, M.
    Ahmad, I.
    Hussain, S.M.
    Khera, R.A.
    Bokhari, T.H.
    Shehzad, M.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/25738.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    Seed pre-sowing magnetic field treatment was reported to induce biochemical and physiological changes. In the present study, response surface methodology was used for deduction of optimal magnetic field doses. Improved growth and yield responses in the pea cultivar were achieved using a rotatable central composite design and multivariate data analysis. The growth parameters such as root and shoot fresh masses and lengths as well as yield were enhanced at a certain magnetic field level. The chlorophyll contents were also enhanced significantly vs. the control. The low magnetic field strength for longer duration of exposure/ high strength for shorter exposure were found to be optimal points for maximum responses in root fresh mass, chlorophyll ‘a’ contents, and green pod yield/plant, respectively and a similar trend was observed for other measured parameters. The results indicate that the magnetic field pre-sowing seed treatment can be used practically to enhance the growth and yield in pea cultivar and response surface methodology was found an efficient experimental tool for optimization of the treatment level to obtain maximum response of interest.
    Źródło:
    International Agrophysics; 2013, 27, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ethnobotanical investigation of significant seasonal medicinal weeds of Toba Tek Singh District, Punjab, Pakistan
    Autorzy:
    Tufail, M.
    Hussain, K.
    Nawaz, K.
    Iqbal, I.
    Arshad, N.
    Shahzadi, A.
    Javed, A.
    Nazeer, A.
    Bashir, Z.
    Qurban, M.
    Zeb, J.
    Ali, S.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049359.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Włókien Naturalnych i Roślin Zielarskich
    Tematy:
    weeds
    ethnobotany
    flora
    survey
    chwasty
    etnobotanika
    badanie
    Opis:
    Introduction: Medicinal plants are found throughout the world but most are considered weeds. They are – directly or indirectly – the major source of medicines in pharmaceutical and herbal industries. Formulations used to prepare medicines or the method of use for these plants are mainly based on folk or traditional knowledge. This folk knowledge is not documented in many areas and needs to be explored. Objectives: This study was aimed to enlist the seasonal weed species with traditional medicinal usage in Toba Tek Singh District, Punjab, Pakistan. Methods: Field surveys were arranged in winter and summer 2019–2020 to enlist the important medicinal weeds and traditional knowledge of the local community. Data collected were as follows: local name of weed, medicinal use, method and part used. Results: Numerous wild perennial, biennial and annual plants were identified, 30 of them were ethnomedicinally important in the local community. They were grouped in 16 families. It was found that whole weed is used in many prescriptions (37%). Achyranthes aspera L. (Amaranthaceae) was the most common weed used in treating fevers, respiratory problems and asthma. Cichorium intybus L. (Asteraceae) was used in summer drinks to reduce thirst, improve digestion and liver function. Chenopodium album L. (Amaranthaceae) was used with 0.71 UV and 0.147 RFC values. Medicago polymorpha L. (Fabaceae) was used to treat kidney, intestinal and bladder infections. Its UV was 0.65 and RFC was 0.121. Tribulus terrestris L. (Zygophyllaceae) was used in impotency treatment, and in the removal of kidney stones and urinary tract infections treatment. It has 0.63 UV and 0.21 RFC values. This weed also showed the highest Fidelity Level (FL) (77%), as compared to other weeds. Conclusion: It was concluded that there are many significant medicinal weeds in the Toba Tek Singh District, Punjab, Pakistan that are used in traditional medicines in treating various disorders. These plants also showed herbal or pharmacological importance that can be used to develop medicine at commercial scale.
    Źródło:
    Herba Polonica; 2021, 67, 2; 29-38
    0018-0599
    Pojawia się w:
    Herba Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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