پروفیسر ہیکل
ماہ اگست میں علمی دنیا کا سب سے بڑا حادثہ پروفیسر ہیکل کی وفات ہوا، پروفیسر موصوف ڈارون و ہکسلی کا ہمعصر، اور بہ لحاظ شہرت و وقعت ان کا ہمسر تھا۔ وفات کے وقت اس کی عمر ۸۵ سال سے متجاوز تھی، ہیکل کا وطن جرمنی تھا، لیکن اس کی عظمت تمام دنیا میں مسلّم تھی اور سائنس کی دنیا میں کوئی شخص اگر اس وقت استاذ الاساتذہ کی حیثیت رکھتا تھا، تو ہیکل تھا، اس کا اصلی مضمون بیالوجی (علم الحیات) تھا، جس میں، اسے متعدد اکتشافات و مجتہدانہ نظریات کا شرف حاصل ہے، لیکن اس کے علاوہ فلسفہ وغیرہ میں بھی اس کی تصانیف موجود ہیں۔ اس کی مشہور کتاب اردو میں بھی ’’معمائے کائنات‘‘ کے عنوان سے زیر ترجمہ ہے۔ (سید سليمان ندوی، اکتوبر ۱۹۱۹ء)
Quran is the word of Allah Almighty, therefore, in order to understand it in the true sense, a person has to sharpen his or her intellectual ability as well as increase the knowledge. When one is at a particular intellectual level, only then can he or she start understanding the true message, which Allah Almighty conveyed through words of Quran. Pertaining to the explanation of Quran for the understanding of general audience, different people have tried to write the Tafseer of Quran. Although Muslims recite Quran and try reading it with translation, however, the reading of Tafseer has its own importance. “Tafseer Dawat-Ul-Quran” is written by Abu Nauman Saifullah Khalid and published from Dar-Ul_Undalus Lahore in 2010. This Tafseer has been written in the light of the Quran, Hadith, and the sayings of the companions of Prophet. In this Tafseer correct tradit-ions has been included and unauthentic traditions has been avoided. In theological interpretations, the words of Qur'an are explained in the context of the Qur'an itself or the sayings of The Holy Prophet(ﷺ). This type of interpretation is called “Tafseer Bilmasur”.“Tafseer Dawat-Ul-Quran”is representative of Tafseer Bilmasur. In this research article, the Salient features of “Tafseer Dawat-Ul-Quran” are discussed.
The work described here deals with the synthesis and characterization of inorganic and hybrid perovskite for light harvesting applications. The inorganic lead and copper based metal halide perovskites were prepared and their fluorescent sensing ability was explored. The all-inorganic bulk CsCuCl3 and CsCuBr3 perovskites were synthesized by wet chemical method and were used for sensing of lead ions and aqueous contamination in DMF respectively. On the other hand, aerosol assisted chemical vapour deposition (AACVD) technique was adopted to fabricate thin films of CsPbBr2I. The oleylamine capping agent facilitates the formation of morphological controlled microsquares on the glass substrate. In addition, nanosquares of CsPbBr2I perovskite were prepared by wet chemical approach. Furthermore, phase pure micro sized crystals of CsPbBr2I were obtained by using TOP as antisolvent as well as capping agent to control morphology of microcrystals. These microcrystals were then used for nitrophenol detection. The CsPbBr2I bulk perovskite were used to fabricate ZnO based planner solar cell which have shown promising power conversion efficiency of 4.8%. The as-prepared metal halide perovskite were characterized by powdered X-ray diffraction spectroscopy (pXRD), UV-Visible spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). In addition, thermal and water stable OHNH3PbX3 hybrid perovskites were prepared for photocatalysis application to degrade dye molecules. Whereas, the synthesis of (Cs)x(PhNH3)2-xPbBr4-xIx perovskite nanoparticles were performed to develop qusai-2D structures. The replacement of B site cations to develop lead free CH3NH3Pb1-xCuxBr3 hybrid perovskites was described. The gradual replacement of lead with copper leads to the formation of lead free hybrid perovskite nanoparticles and thin film. These hybrid perovskites have shown interesting optical properties.