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Flow and Heat Transfer Due to a Stretching Cylinder in a Porous Medium

Thesis Info

Author

Abid Majeed

Department

Basic and Applied Sciences

Program

MS

Institute

International Islamic University

Institute Type

Public

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2011

Thesis Completion Status

Completed

Subject

Media and Communication Studies

Language

English

Other

[MS 536.201 ABF]

Added

2021-02-17 19:49:13

Modified

2023-01-06 19:20:37

ARI ID

1676724339255

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سرِ شام: ایک مختصرتاثر

 عارفہ ثمین اختر نے دور طالب علمی میں تحقیق و تنقید اور شعر گوئی سے بیک وقت اپنا شغف ظاہر کیا تھا؛ لیکن عمدہ دسترس کے باوصف اول الذکر سے ان کا ناتا نصابی مدار تک محدود رہا جبکہ ثانی الذکر سے وابستگی سرمدی ثابت ہوئی؛ یوں تخلیق سے منسوب ثروت ایک بار پھر اپنی فوقیت کا اثبات کرانے میں با مراد ٹھیری۔ یہ درست ہے کہ انھیں عہد طفولیت ہی سے ادبی علمی فضا میسر آئی مگر اس معاونت کا دایرہ اثر تحدید کی تقدیر اپنے ہمراہ لاتا ہے۔ فرد اگر اپنی ذات میں اساسی تخلیقی جوہر نہیں رکھتا تو محض ماحول قلب ماہیت کا اعجاز نہیں دکھا سکتا۔

 عارفہ کی مذکورہ وہبی استعداد کا اعتراف ان کی غیر موجودگی میں اکثر سننے میں آتا رہا اور انھیں سننے کے بلا واسطہ مواقع بھی ملے۔ اس کے بعد ایک ایسا طویل وقفہ آیا کہ سچی بات ہے وہ رفت گزشت ہو گئیں کیونکہ وہی لکھنے والے قاری کے حلقہ ء نظر میں رہتے ہیں جو اس کے آئینہ ء ابصار تلک رسائی کا اہتمام بلکہ تردد کرنے میں کامیاب رہتے ہیں۔ اس دوران میں ادبی جراید یا سوشل میڈیا کے توسط عارفہ کے سخن قرطاس یا اسکرین پر نہیں ابھرے۔ اب کوئی تین دہائیوں کی گزران کے بعد یکایک ان کا شعری مجموعہ: ”سر شام“ کے عنوان سے سامنے آیا ہے تو خوشگوار حیرت نے اپنے حصار میں لے لیا ہے! مسرت اس لیے ہوئی کہ عارفہ نے اپنے وجود کی مناسبت سے عرفان آگہی کی آن کو حرز جان بنائے رکھا اور اس انمول خوبی کی اضاعت کا سانحہ نہیں ہونے دیا وگرنہ کڈھب مسائل حیات ان گنت دلنشیں تخلیق کاروں کو نگل گئے!

”سر شام“ کی غزلوں اور نظموں میں ضو ریز شاعری خود متکلم ہے کہ اس...

Spatial-Temporal Analysis the Dynamics of Changes on the Foreign Exchange Market: An Empirical Estimates from Ukraine

The foreign exchange market plays an important role in the formation and development of financial markets. This market is of particular importance for emerging economies. To understand market trends (to understand and develop a strategy for its development), it is necessary to analyze historical data. It is also important to use different methods to carry out this analysis. Based on this, the paper analyzes the foreign exchange market in Ukraine for the period 2014-2018. For this analysis, the wavelet coherence methodology is used. This made it possible to assess the development of the foreign exchange market in Ukraine.

New Homoleptic and Heteroleptic Palladium Ii Dithiocarbamates: Synthesis, Characterization and Anticancer Screening

In the present study, 52 different homoleptic and heteroleptic Pd(II) complexes were synthesized by reacting palladium(II) chloride with substituted triphenylphosphine and sodium salts of dithiocarbamates namely in a mixture of dry solvents. The ligands and various substituted triphenylphosphines used were sodium 4-benzylpiperazine-1-carbodithioate (L-1), sodium 4-diphenylmethylpiperazine-1-carbodithioate (L-2), sodium 4-(2-methoxyphenyl)piperazine-1-carbodithioate (L-3), sodium 4-(3-methoxyphenyl)piperazine-1-carbodithioate (L-4), sodium 4-benzylpiperidine-1-carbodithioate (L-5), sodium 4-(2-pyridyl)piperazine-1-carbodithioate (L-6), sodium 4-(2-pyrimidyl)piperazine-1-carbodithioate (L-7), sodium 4-(2-furoyl) piperazine-1-carbodithioate (L-8), sodium 4,4''-trimethylenedipiperidine-1-carbodithioate (L-9), tris(p-chlorophenyl)phosphine, tri-p-tolylphosphine, diphenyl-p-tolylphosphine, 1,4- bis(diphenylphosphino)butane, and tris(4-flourophenyl)phosphine. The coordination mode of ligands toward Pd(II), structural confirmation and geometry assignment of the complexes were made, using different analytical techniques such as elemental analysis, FT-IR, multinuclear (1H, 13C and 31P) NMR and X-ray single crystal analysis. Based on results, the ligand appeared to coordinate the Pd(II) atom through CSS moiety. The homoleptic and heteroleptic Pd(II) complexes demonstrate perfect square planner and distorted square planer geometries, respectively. The synthesized complexes were screened for in vitro cytotoxic activity against six different cell lines, LU (Lungs cancer cell lines), MCF-7 (mammary adenocarcinoma cell), 1c1c7 (murine hepatoma cells), PC-3 (prostate carcinoma), MDA-231 (estrogen-independent breast cancer cells) and HeLa (cervical carcinoma cell) by the MTT {Tetrazolium [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide} method. The homoleptic Pd(II) was less active whereas heteroleptic Pd(II) complexes composed of bidentate 1,4-bis(diphenylphoshino)butane, flouro and uncoordinated group (carbonyl and nitrogen) was found to be most active against different cancer cell lines as compare to the standard drug (Staurosporine and cisplatine). The interaction of the selected Pd(II) compounds with DNA was investigated by UV-Vis spectroscopy. The hypochromic effect for all the selected Pd(II) complexes was observed, indicating intercalative mode of interaction of these complexes with DNA. The antioxidant activity of selected Pd(II) complexes were evaluated using DPPH as a free radical and Ascorbic acid as a standard. Most of the complexes showed higher antioxidant property than the standard. The selected Pd(II) complexes were also evaluated to check their cytotoxicity and phytotoxicity using brine shrimp assay and seedling growth of maize, respectively. The highest activity was shown by compounds containing oxygenated species (19). Selected complexes were also screened for their antibacterial and antifungal activities against various strains of bacteria and fungi, and were found active.