Wyniki wyszukiwania - Biblioteka Nauki

1

Advances in bovine follicular aspiration technique

100%

Ali S.

|

tom 157

2

Classification of EEG Signals Using Adaptive Time-Frequency Distributions

84%

Khan N. A. , Ali S.

|

tom Vol. 23, nr 2

251--260

EN

Time-Frequency (t-f) distributions are frequently employed for analysis of new-born EEG signals because of their non-stationary characteristics. Most of the existing time-frequency distributions fail to concentrate energy for a multicomponent signal having multiple directions of energy distribution in the t-f domain. In order to analyse such signals, we propose an Adaptive Directional Time-Frequency Distribution (ADTFD). The ADTFD outperforms other adaptive kernel and fixed kernel TFDs in terms of its ability to achieve high resolution for EEG seizure signals. It is also shown that the ADTFD can be used to define new time-frequency features that can lead to better classification of EEG signals, e.g. the use of the ADTFD leads to 97.5% total accuracy, which is by 2% more than the results achieved by the other methods.

3

Enhancing the flexural load capacity of the reinforced concrete simply supported slabs using damaged tires strips (DTS)

84%

Ali S. , Alalikhan A.

|

nr 2

4

Measuring Heavy Metals Content in Wastewater using Laser Induced Breakdown Spectroscopy

67%

Ali S. , Jamil H. , Imran M.

|

tom Vol. 2

69-75

EN

In the present study, laser-induced breakdown spectroscopy (LIBS) has been applied for the determination of chromium and cadmium contents in wastewater of different canneries surrounding by leather factories. The plasma was generated with a Q-switched Nd:YAG laser having a fundamental wavelength of 1064 nm and delivers maximum pulse energy of 180 mJ. Experimental conditions were optimized to improve the sensitivity and to get a reasonable signal from the generated plasma. The results show that the concentration of chromium and cadmium are varying in different samples depending on the incoming flow of the wastewater from factories. The results from LIBS and standard analytical technique called flame atomic absorption spectroscopy (FAAS) were compared and found in good agreement within the experimental uncertainties.

5

Significance of arbuscular mycorrhizal and bacterial symbionts in a tripartite association with Vigna radiata

67%

Yasmeen T. , Hameed S. , Tariq M. , Ali S.

|

nr 4

EN

Legumes as an important functional group of land plants are recognized to grow in water-deficient and low-nutrient environment because of their ability to form symbiosis with nitrogen fixing rhizobia and arbuscular mycorrhizal (AM) fungi, which improve nutrient acquisition from the soil and help plants to be well established. Aim of the present study was to evaluate the symbiotic potential of AM fungi, Glomus intraradices alone and/or in combination with two Bradyrhizobium japonicum strains MN-S and TAL-102 in Vigna radiata. Field experiment was conducted to investigate the influence of different microbial symbiotic associations on growth and yield of V. radiata. Dual inoculation of G. intraradices and both bacterial inoculants showed better potential of plant growth promotion over single inoculation of G. intraradices or bacterial inoculants. Both bacterial inoculants in combination with AM proved best with 3.78, 30.17 and 46.80 g plant⁻¹ dry weight at 25, 45 and 90 days after sowing (DAS), respectively. Maximum grain yield of 1,506.87 kg ha⁻¹ as well as phosphorus contents of 1.981 mg g⁻¹ root, 3.830 mg g⁻¹ shoot and 4.935 mg g⁻¹ grain were observed with mix bacterial inoculants and AM at 90 DAS. The interactive effect of bacterial inoculants and AM was synergistically significant which improved the nitrogen contents by 68, 20 and 17% in root, shoot and grain, respectively, compared to uninoculated control at 90 DAS. The present study suggests the suitability of G. intraradices and B. japonicum having synergistic or additive interaction to be used as composite inoculum for enhancing crop production of V. radiata.

6

Evaluation of a Salmonella strain isolated from honeybee gut as a potential live oral vaccine against lethal infection of Salmonella Typhimurium

67%

Zafar H. , Rahman S. U. , Ali S. , Javed M. T.

|

nr 2

EN

In this research, Salmonella species were isolated from the animal, insect and human enteric sources in Faisalabad, Punjab, Pakistan. These species were characterized by different microbiological and molecular techniques including polymerase chain reaction (PCR) by ampli-fication of the 16S rRNA gene. Furthermore, sequencing of the amplicons confirmed all ten isolates as Salmonella strains. The antigenic cross-reactivity was found maximum between the HB1 (strain isolated from honeybee) antiserum and its antigen with an antibody titer of 1:128, while the HB1 antiserum showed a cross-reactive titer range of 1:8 to 1:64. On the basis of the highest geometric mean titer (GMT) shown by the antiserum of the HB1 antigen, it was selected as the best candidate for a cross-reactive live Salmonella oral antigen. Moreover, the HB1 antigen was used a live oral antigen (1×10¹⁰CFU/ml) in a safety test in rabbits and proved to be avirulent. During the animal trial, three different oral doses of the HB1 live oral antigen were evaluated in four different rabbits’ groups (R1, R2, R3, and R4). The dose number 2 of 0.5ml (two drops orally and repeated after one week) gave the best GMT measured by indirect hemagglutination (IHA) as compared to the other two doses, while R4 group was kept as control. Results of the challenge protection test also validated the efficacy of the double dose of the HB1 live vaccine, which gave the highest survival percentage. Results of this study lay the foundation for a potential cross-reactive live oral Salmonella vaccine that has proved to be immunogenic in rabbits.

7

Identities with generalized derivations in semiprime rings

67%

Dhara B. , Ali S. , Pattanayak A.

|

tom Vol. 46, nr 3

453--460

EN

Let R be a semiprime ring. An additive mapping F:R  R is called a generalized derivation of R if there exists a derivation d : R  R such that F(xy) = F(x)y + xd(y) holds, for all x,y  R. The objective of the present paper is to study the following situations: (1) (...), for all x, y in some appropriate subset of R.

8

On horizontal and complete lifts of (1,1) tensor fields F satisfying the structure equation anFn+an-1Fn-1+an-2Fn-2+.......a2F2+a1F=0

67%

Nivas R. , Ali S. , Srivastava S. K.

|

2002

|

tom Vol. 35, nr 1

155-163

EN

The horizontal and complete lifts from a differentiable manifold Mn of class C°° to its cotangent bundle T*(Mn) have been studied by Professors Yano and Patterson [5, 6]. Yano and Ishihara [7] studied lifts of f-structure in the tangent and cotangent bundles. F-structure manifolds of degree v > 3 have been studied by Kim [2]. Lifts of (1,1) tensor fields F satisfying Fv+2 - A2Fv-1 = 0 and Fv + (-l)v+1F = 0 have been studied by Srivastava [4]. The present paper deals with some problems on horizontal and complete lifts tensor fields satisfying polynomial equations of the type mentioned above. Integrability conditions are discussed, and prolongations in the third tangent space T3(Mn) are also considered.

9

Comparative growth kinetic study of Newcastle disease virus, infectious bursal disease virus and avian influenza virus in chicken embryo fibroblast and DF-1 cell lines

60%

Anam S. , Rahman S. U. , Ali S. , Saeed M. , Goyal S. M. , Anam S. , Rahman S. U. , Ali S. , Saeed M. , Goyal S. M.

|

10

Parametric study on cement treated aggregate panel under impact load

51%

Ali S. , Liu X. , Thambiratnam D. , Fawzia S. , Gu Y. , Wu J. , Remennikov A.

|

2018

|

tom Vol. 18, no. 2

622--629

EN

The cement treated aggregate (CTA) is increasingly used as base or sub-base layer for pavement to withstand various traffic and dynamic loads. Under extreme events, the CTA layer of the pavement is expected to absorb significant amount of impact energies subjected to different loading conditions including accidents, mobile vehicles, heavy aircrafts, machinery, or even terrorist attack. However, no research has been found on the resistance of CTA under drop weight impact load. To fill up this gap, a detailed study was carried out to investigate the impact resistance of CTA under impact loading through both experimental and finite element analysis (FEA). Moreover, detailed parametric studies were carried out based on the validated model to determine the significance of selected key parameters on the impact resistance of CTA.

11

Genetic diversity of Brassica rapa germplasm of Khyber Pakhtunkhwa Pakistan revealed by molecular markers

51%

Ali N. , Ali S. , Khan N. U. , Jan S. A. , Rabbani M. A. , Hussain I.

|

nr 6

EN

A total of 96 indigenous Brassica rapa accessions were collected from different locations of Khyber Pakhtunkhwa, Pakistan. Simple Sequence Repeats (SSR) markers were used to identify the most diverse genotypes among the collected lots. Twenty six (26) different SSR primers were used for (genetic) variability among collected genotypes. These primers were selected from literature based on their previous results. These primers produced 135 scorable bands of which 75 were polymorphic, with an average of 55.5% polymorphic loci, and reflected the broader genetic background of the collected genotypes. An average 2.88 polymorphic bands with an average PIC value of 0.49 was recorded. Unweighted Pair Group Method with Arithmetic Mean (UPGMA) divided all genotypes into three main groups. Group one contained three clusters, while group two and three had four and two clusters each. Based on the UPGMA dendrogram, genotypes collected from Kohat, Bannu, Swat and Haripur showed considerable amount of variation. From the present study, it is concluded that SSR markers can be proved as the best tool for the genetic variability of other local and exotic B. rapa genotypes.

12

Priming-induced antioxidative responses in two wheat cultivars under saline stress

51%

Islam F. , Yasmeen T. , Ali S. , Ali B. , Faroog M. A. , Gill R. A.

|

nr 08

EN

Wheat, a glycophyte grown in tropical and subtropical regions, is frequently being subjected to soil salinity ultimately affecting the plant growth and yield. Focus of the present study was to evaluate the ameliorative efficiency of different seed priming methods including hydropriming and halopriming [KCl and CaCl2 (100 mM)] by observing change in the expression of antioxidant defense system and accumulation of phenolic as well as proline in the spring wheat Lu26s (salt tolerant) and Lasani-06 (salt sensitive), grown under salt stress of 100 mM NaCl. Results showed that salt stress provoked a marked decline in germination, growth and yield parameters as well as increased lipid peroxidation and hydrogen peroxide (H2O2) contents. However, higher accumulation of proline and low H2O2 contents were recorded in both cultivars under halopriming followed by hydropriming. Halopriming induced a significant increase in antioxidant enzyme activities (CAT, POD, APX) of salt-tolerant cultivar Lu26s, whereas such pattern of enhanced activities of antioxidant enzymes in cultivar Lasani-06 was also found but the content of these activities was less than control under saline regime. The cultivar Lu26s (salt tolerant) maintained lower Na+ and higher K+/Na+ ratio in leaves than salt-sensitive cultivar Lasani-06. Reason behind the loss of grain yield under salinity was found due to the reduction in the grain spike-1 in cultivar Lasani-06, while, in cultivar Lu26s, it was due to decrease in the size of grains. Enhanced germination, low proline and Na+ contents stimulated antioxidant activities as well as phenolic contents associated with improved salt tolerance in haloprimed plants. These results suggest that halopriming is an efficient approach for imparting tolerance in wheat against salinity stress.

13

Expression of urocortin and its receptors in the rat epididymis

51%

De Luca A. , Liguori G. , Squillacioti C. , Paino S. , Germano G. , Ali S. , Mirabella N.

|

nr 2

14

Brucellosis in Mirpur, Azad Kashmir Pakistan: a livestock threat for neighboring zones

43%

Mubeen H. , Khan I. , Saleem M. H. , Akhtar R. , Ali S. , Saqib M. , Khan A. U. , Umar S.

|

nr 07

EN

The objective of the present study was to determine the prevalence of brucellosis in household animals of Mirpur, Azad Kashmir due to its geographic importance. A total of 360 blood samples of cattle, buffaloes, sheep and goats were initially screened through Rose Bengal Plate test (RBPT) and then positive samples were subjected to Enzyme Linked Immunosorbent Assay (ELISA) for confirmation and quantification of antibody titers. Molecular confirmation of serologically positive samples was performed by real time polymerase chain reaction (PCR). RBPT and ELISA showed a total of 8.6% and 6.87% positive samples respectively. The species wise seropositivity by RBPT was greater in cattle followed by buffaloes, goats and sheep. Similarly ELISA showed more seropositivity in cattle than buffaloes, while sheep and goats were negative for brucellosis by ELISA. RT-PCR revealed 100% samples positive for Brucella abortus by species specific PCR. This study revealed the presence of Brucella abortus in Mirpur for the first time. Since brucellosis is listed in transboundary diseases, its presence in this geographically important region could be a potential threat for neighboring countries.

15

Prevalence of multi-drug resistant Mycobacterium tuberculosis in Khyber Pakhtunkhwa – a high tuberculosis endemic area of Pakistan

43%

Ali S. , Khan M. T. , Khan A. S. , Mohammad N. , Khan M. M. , Ahmad S. , Noor S. , Jabbar A. , Daire C. , Hassan F.

|

nr 2

16

Urban sprawl and its impact on soil and plant species in Peshawar, Pakistan

43%

Ali K. , Shuaib M. , Malik T. , Shah S. S. , Ali S. , Shah N. A. , Hussain F. , Khan I. , Akhtar N. , Li Z.

|

nr 4

EN

The current paper aims to highlight: 1) Major problems due to urbanization, including land cutting, erosion, overgrazing, biodiversity loss, and climate change. 2) The impact of grazing on plant community structure and ecosystem functioning. 3) Management and conservation of natural ecosystems in Sheikh Muhammdi Peshawar. For the current work, three different sites (Zones 1, 11, 111) were selected in the local area. The populations of the local area have increased very rapidly in the last 40 to 50 years. Anthropogenic activities associated with population and industrialization in the district, with vegetation clear for developing of towns and roads, has resulted in the substitution of vegetations with the dark color surface, the temperature of the environments much higher than before, leading to the phenomenon of the urban heat island effect. This urbanization and construction work at Amman plots Sheikh Muhammadi Peshawar is causing the extinction of vegetation and there would be no more wild vegetation in the near future in that particular area.

17

The synergistic effects of sucrose and plant growth regulators on morphogenesis and evaluation of antioxidant activities in regenerated tissues of Caralluma tuberculata

43%

Zamir R. , Khalil S. A. , Ahmad N. , Rab A. , Shah S. T. , Jabeen N. , Ali S. , Ali M.

Acta Physiologiae Plantarum

|

2016

|

tom 38

|

nr 08

18

Statistical modeling for the extraction of dye from natural source and industrial applications

43%

Jabeen S. , Ali S. , Nadeem M. , Arif K. , Quereshi N. , Shar G. A. , Soomro G. A. , Iqbal M. , Nazir A. , Siddiqua U. H.

|

nr 4

EN

This study is intended to scrutinize the consequence of extraction conditions of Lawsonia Inermis (henna) leaves on the color strength values of dyed fabric. Extraction pH, M:L ratio, and time were optimized using central composite design (CCD) under response surface methodology (RSM). We investigated how the maximum colour strength values were obtained at pH 6.64 in about 78 minutes extraction with an M:L ratio of 1:44. ANOVA results showed that all the extraction parameters significantly affect the colour strength values of dyed samples. 99% variation in the response was indicated in the 2nd-order regression equation for K/S. The fastness properties with respect to light, washing, and rubbing were quite satisfactory of dyed samples under optimized extraction conditions.

19

Heptoprotective role of Artemisia scoparia Waldst. and kit against CCl4-induced toxicity in rats

35%

Waris T. S. , Khan M. R. , Shah N. A. , Shuaib M. , Hussain F. , Ishaq M. , Kamal Z. , Zeb U. , Ali S. , Ahmed S. , Hussain F.

|

nr 3

EN

In this study, the methanol extract of Artemisia scoparia was evaluated for its protective potential against carbon tetrachloride (CCl₄)-induced hepatic toxicity. Seven groups of mature albino rats were used in the course of the experiment and each group was treated with specific doses of plant extract and CCl₄. Silymarin was used as a standard protective drug. The results of the experiment revealed that Artemisia scoparia plant extract was successful in fighting CCl₄ toxicity as it clearly reduced the elevated levels of liver serum markers (alkaline phosphatase and alkaline aminotransferase), lipid peroxidation, nitrite content, and H₂O₂ on one side while enhancing the levels of antioxidant enzymes (catalase, peroxidase, superoxide dismutase, glutathione-s-transferase, γ-Glutamyltranspeptidase, and glutathione reductase) and protein content. It also protected DNA from the damaging effects of CCl₄. The findings of this study demonstrate that Artemisia scoparia plant extract plays a significant role in preventing the hepatic damages instigated with CCl₄ and can be used as a protective agent against oxidative stress-associated disorders.

20

Mechanism of insecticide resistance in insects/pests

35%

Khan S. , Uddin N. , Rizwan M. , Khan W. , Farooq M. , Shah A. S. , Subhan F. , Aziz F. , Rahman K. U. , Khan A. , Ali S. , Muhammad M.

|

nr 3