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Wyszukujesz frazę "Hussain, Arshad" wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
A Comparative Numerical and Experimental Study of Light Weight Materials for Neutralizing Explosive Reactive Armour
Autorzy:
Naeem, Khalid
Hussain, Arshad
Malik, Abdul Qadeer
Abbas, Shakeel
Ahmad, Iftikhar
Farrukh, Sarah
Powiązania:
https://bibliotekanauki.pl/articles/27788026.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
simulation
explosive reactive armour
Kontakt-5
non-initiating precursor
tandem
Opis:
Explosive reactive armour (ERA) consists of an explosive sandwiched between two metal plates fitted on armoured vehicles to enhance their protection. To defeat an ERA mounted vehicle, its ERA must be neutralized first. A precursor fitted in a TANDEM warhead is used for this purpose in two modes. One is to detonate the ERA and the other is without detonation. This paper presents work performed on the ability of light-weight materials to neutralize the Kontakt-5 ERA without detonation. The precursor performing in this manner is known as a non-initiating precursor (NIP). Eight experiments were performed with aluminium, Teflon® and perspex as liners, against Kontakt-5 ERAs at about 90º and 30º inclination. In five of these experiments, the ERA did not detonate, however in three experiments it did detonated. In all of the experiments the precursor over-performed, producing a prominent hole in the target larger than that predicted by simulation. The over-performance was balanced by decreasing the angle of attack. These experiments demonstrated that an NIP depends strongly upon the ERA as well as on the angle of attack. The overall conclusion from this work is that an NIP is a promising technique to defeat a specific ERA without detonation.
Źródło:
Central European Journal of Energetic Materials; 2021, 18, 2; 271--286
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Gamma Kumaraswamy-G family of distributions: theory, inference and applications
Autorzy:
Arshad, Rana Muhammad Imran
Tahir, Muhammad Hussain
Chesneau, Christophe
Jamal, Farrukh
Powiązania:
https://bibliotekanauki.pl/articles/1059046.pdf
Data publikacji:
2020-12-04
Wydawca:
Główny Urząd Statystyczny
Tematy:
stochastic ordering
Opis:
In this paper, we introduce a new family of univariate continuous distributions called the Gamma Kumaraswamy-generated family of distributions. Most of its properties are studied in detail, including skewness, kurtosis, analytical comportments of the main functions, moments, stochastic ordering and order statistics. The next part of the paper focuses on a particular member of the family with four parameters, called the gamma Kumaraswamy exponential distribution. Among its advantages, the following should be mentioned: the corresponding probability density function can have symmetrical, left-skewed, right-skewed and reversed-J shapes, while the corresponding hazard rate function can have (nearly) constant, increasing, decreasing, upside-down bathtub, and bathtub shapes. Subsequently, the inference on the gamma Kumaraswamy exponential model is performed. The method of maximum likelihood is applied to estimate the model parameters. In order to demonstrate the importance of the new model, analyses on two practical data sets were carried out. The results proved more favourable for the studied model than for any of the other eight competitive models.
Źródło:
Statistics in Transition new series; 2020, 21, 5; 17-40
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Solublising Aids on The Entrapment of Loratidine in Pre-Fabricated PVA Filaments Used for FDM Based 3D-Printing
Autorzy:
Mahmood, Faisal
Hussain, Amjad
Arshad, Muhammad Sohail
Abbas, Nasir
Irfan, Muhammad
Qamar, Nadia
Hussain, Fahad
Ghori, Muhammad Usman
Powiązania:
https://bibliotekanauki.pl/articles/895332.pdf
Data publikacji:
2020-02-29
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
3D printing
Plasticizers
Fused deposition modelling (FDM)
PVA filaments
Solubilizers
Opis:
Low drug loading efficiency is the limiting factor in the use of pre-fabricated filaments for 3D printing of pharmaceuticals. The aim of present study was to modify the material properties of pre-fabricated filament by incorporating the suitable solubilizing aids in order to enhance the drug loading efficiency. Loratadine was loaded into PVA filaments by using solubilizers (Soluplus®, Sodium lauryl sulphate) and plasticizers (glycerin and Polyethylene glycol-400) and the printability of filaments was investigated. The treated filaments were characterized for morphology and diameter changes, drug content, FTIR and thermal properties and printed into tablets of suitable dimensions. The printed tablets were also characterized for drug assay and drug release. The results have shown that the surface of different drug loaded filaments become rough with almost no change in diameter hence, these filaments remained printable. However, there was 7 to 24 times enhancement in drug content of filaments treated with particularly those pretreated with glycerin and soaked in drug solution containing Soluplus. The printed tablets have also shown almost similar drug content as their precursor filaments and the release followed diffusion mechanism in most of the formulations. The study concludes that the treatment of PVA filament with solubilizer aids has significantly improved the drug loading entrapment without compromising the printability.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 1; 175-182
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FORMULATION AND EVALUATION OF INDOMETHACIN LOADED NANOSPONGES FOR ORAL DELIVERY
Autorzy:
Abbas, Nasir
Sarwar, Komal
Irfan, Muhammad
Hussain, Amjad
Mehmood, Rabia
Arshad, Muhammad S.
Shah, Pervaiz A.
Powiązania:
https://bibliotekanauki.pl/articles/895238.pdf
Data publikacji:
2018-10-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
sustained release
indomethacin
Nanosponges
Emulsion solvent diffusion method
Franz diffusion cell
Opis:
Nanosponges (NS) loaded sustained release tablet formulations of a non-steroidal anti-inflammatory drug; Indomethacin were successfully developed and evaluated for their pharmaceutical properties. Twelve nanosponge formulations were fabricated by solvent diffusion method by using different ratios of drug and polymers (ethyl cellulose and polyvinyl alcohol). Particle size of all the formulations was in the nano range of 221 to 625 nm and it was found dependent on the polymer concentration. Drug loading and entrapment efficiency was ranged in 32.2 to 59.4 % and 30.1 to 64.8 %, respectively. Formulations with equal proportion of drug and polymer resulted in higher values of drug loading and entrapment efficiency. Percent yield was also found dependent on the relative drug polymer ratio with highest value of 51 % was achieved for the formulation having same drug to polymer ratio. SEM results confirmed the formation of spherical and porous structures. Structural analysis by Fourier transform infrared spectroscopy (FTIR), powder x-ray diffraction (PXRD) showed the absence of any interaction between drug and polymer. In comparison to pure drug, NS formulations showed a linear intrinsic dissolution rate (IDR) profile depicting a controlled release profile. Diffusion studies of NS formulations performed by Franz diffusion cell and dialysis bag methods showed comparable results in terms of precision and linearity of diffusion profile. Tablets prepared from the drug loaded NS showed acceptable values for hardness, friability and drug content. Release of drug from NS tablets was confirmed as sustained release behaviour.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 5; 1201-1213
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
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 1-5 z 5

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