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Home > Study of Modulational Instability of Ion Acoustic Waves in Plasmas Using Kbm Perturbative Technique

Study of Modulational Instability of Ion Acoustic Waves in Plasmas Using Kbm Perturbative Technique

Thesis Info

Access Option

External Link

Author

Durrani, Ijaz Ur Rahman

Program

PhD

Institute

Quaid-I-Azam University

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

1985

Thesis Completion Status

Completed

Subject

Physics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/4734/1/2029.pdf

Added

2021-02-17 19:49:13

Modified

2023-01-06 19:20:37

ARI ID

1676727380708

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آپ ؐ بحیثیت معلم

آپ ؐ بحیثیت مُعلّم
نحمدہ ونصلی علی رسولہ الکریم امّا بعد فاعوذ بااللہ من الشیطن الرجیم
بسم اللہ الرحمن الرحیم
لقد کان لکم فی رسول اللہ اسوۃ حسنہ
صدر ِذی وقار اور میرے ہم مکتب ساتھیو!
آج مجھے جس موضوع پر لب کشائی کی سعادت حاصل ہور ہی ہے وہ ہے:’’آپؐ بحیثیت معلم ‘‘
جنابِ صدر!
’’وہ ہے اسوۂ حسنہ‘‘ اس مختصر وقت میں آپ ؐ کی زندگی کے تمام گوشوں پر روشنی ڈالنانا ممکن ہے میں صرف آپؐ بحیثیت معلم پراظہار خیال کروں گا۔
صاحبِ صدر!
حضورؐ کی سیرت طیبہ پر اگر سرسری نظر ڈالی جائے تو ہمیں وہاں زندگی کی بوقلمونیوں کا ایک حسین و جمیل مرقعّ نظر آتا ہے، وہاں جنگ کی شعلہ بیانیاں بھی ہیں اورصلح کی راحت و رحمت بھی، دشمن نفرت کے انگارے بھی برساتے ہیں اور عقیدت مند اپنی محبت و مودت کے رنگین پھول بھی نچھاور کر رہے ہوتے ہیں۔ ہم نے محبوبِ خداؐ کو حلقہ یاراں میں بھی دیکھا ہے اور حملہ آوروں کے نرغہ میں بھی۔ ہم نے ان کی کاروباری مصروفیتوں کا بھی مطالعہ کیا ہے، اور غارِ حرا میں خلوتوں میں ان کے سوز و گداز کا بھی جائزہ لیا ہے ،ہم نے انہیں اپنے وطن سے بظاہر انتہائی بے بسی اور بے کسی میں ہجرت کرتے بھی دیکھا ہے اور چند سال بعد اس شہر میں فاتحانہ انداز میں داخل ہونے کا منظر بھی ملاحظہ کیا ہے۔ اپنے اہل وعیال کے ساتھ ان کے برتاؤ کا ریکارڈ بھی ہمارے سامنے ہے اور اپنے جاں نثار اور وفا شعار ساتھیوں کے ساتھ حسن سلوک کی تفصیلات بھی ہمارے پیش نظر ہیں۔
جنابِ صدر!
زندگی کے وسیع وعریض میدان کا کوئی کونہ ایسانہیں ہے جہاں حبیب کبریا ؐنے اپنے اسوۂ حسنہ کے حسین و جمیل نقوش نہ چھوڑے ہوں۔ یہ جامعیت، یہ...

ذرائع ابلاغ کے معاشرے پر منفی اثرات

Media often hypes the basic facts or information and presents them so as to increase the superficial appeal of things. The negative effects of media are seen in terms of media changing the people’s outlook on life. Media have changed the cultural and moral values of society. A majority of the audiences believe in what is depicted by the media. The negative effects of media in particular on children are manifested in terms of their changing mental set-up and the declining quality of their lifestyle. The media that is easily accessible to even small children exposes them to things they need not know and will not understand. This article explains deeply about the Negative effects of media on Society.

Formulation Development and In/Vitro In/Vivo Evaluation of Transdermal Patches Containing Selected Analgestics

Transdermal Drug Delivery Systems (TDDS) exists for a long time such as creams, and ointments for topical ailments.Incorporating drugs in transdermal patch ismore recent application. Liquid reservoir system, solid reservoir/peripheral adhesive system or matrix (drug in adhesive) system may be used to deliver the drug through skin. In present work thirty six matrix type transdermal patch formulations of diclofenac sodium, diclofenac potassium, diclofenac diethylamine and flurbiprofen (nine each) were developed by using hydroxypropylmethylcellulose (HPMC 4000 cps,), polyvinylpyrolidine (PVP K-30,) and ammonio methacrylate copolymer type A (Eudragit RL-100). Different skin permeation enhancers like isopropyl myristate, isopropyl palmitate and tween 80 were incorporated in the formulations. The influence of various formulation variables, such as initial drug load and certain skin permeation enhancers on permeation characteristics of selected analgesics from the prepared formulations was studies through hairless abdominal rabbit skin by using the modified Franz diffusion cell. The permeation parameters were estimated by Chow method following the Fick’s law of diffusion. The penetration profiles of all formulations were influenced significantly (p <0.05) by the addition of enhancers in comparison to formulation controls (without enhancers) and commercially available product (market control). Among the enhancers studied, isopropyl myristate and isopropyl palmitate produced better results with high relative permeation ratio (14.61, 27.40) and enhancing factor (32, 7.83). All the formulations showed good stability and reproducibility. The prepared patch formulations resulted better permeability as compared to the controls with high apparent permeation rates (121.18 ± 34.37 µg.h-1 cm-2) and diffusion coefficients (8.68 ± 0.43 cm2/s × 10-4) with shorter lag times (1.0 ± 0.15 h). The diffusion coefficients were found independent of initial drug load for all formulations. Release profiles were evaluated by model-dependent approaches. The drug release from almost all formulations was best explained by zero order equation, as the plots showed highest linearity (r2 > 0.952), followed by Higuchi equation. The mechanism of drug release for most of formulations was super case II transport and in few, non-Fickian diffusion. The pharmacokinetic parameters of optimized formulations for each drug were determined from blood levels which revealed a profile typical of sustained release formulation having low elimination rate constants and high Mean Residence Time with the ability to maintain adequate plasma levels for 24 h i.e. up to the next application. The higher steady-state flux, diffusion coefficient and permeability coefficient, as well as the decreased lag time of permeation ofdiclofenac sodium 5% with IPP, 5% diclofenac potassium with IPM, 5% diclofenac diethylamine with IPP and flurbiprofen 10% with IPM as compared to formulation control (without enhancer) and commercially available gel (market control) was obtained. The faster permeation of the drug as compared to the controls could be attributed to the incorporation of skin penetration enhancer. The pharmacokinetic analysis confirmed that the optimized formulations exhibit typical sustained release phenomenon having low elimination rate constants and high MRT with the ability to maintain adequate plasma levels for 24 h i.e. up to the next application. Therefore it is concluded that the incorporation of skin penetration enhancers like IPM and IPP are promising in developing matrix type patch formulation.