صحت وصفائی
اسلام ایک پاکیزہ دین ہے۔ اللہ تعالیٰ کا پسندیدہ دین ہے، یہ طہارت و نظافت کو بہت اہمیت دیتا ہے اور اپنے پیروکاروں کو پاکیزگی اور صفائی کی بہت تلقین کرتا ہے، جو شخص صفائی اور نظافت کا خیال رکھتا ہے تو اللہ تعالیٰ اور اس کے محبوب کریم صلی اللہ علیہ و آلہٖ وسلم اسے از حد پسند کرتے ہیں اور ان کے نزدیک وُہ قابل تعریف ہے، اسلام جہاں قلبی و باطنی تعلیمات دیتا ہے وہاں ظاہری صفائی کے احکامات بھی جاری کرتا ہے۔
بے شک اللہ تعالیٰ بہت زیادہ توبہ کرنے والوں اور صاف ستھرا رہنے والوں کو دوست رکھتا ہے۔(القرآن)
پاکیزگی اور صفائی ایمان کا حصہ ہے۔ (الحدیث)
اللہ تعالیٰ خوبصورت ہے اور خوبصورتی کو پسند فرماتا ہے ۔ (الحدیث)
جہاں تک خوبصورتی اور حسن و جمال کا تعلق ہے وہ بغیر صفائی کے کبھی پیدا نہیں ہو سکتی ، صفائی و صحت کا لفظ ظاہراً چند حروف کا مجموعہ ہے لیکن اس میں معانی و مفاہیم کا ٹھاٹھیں مارتا ہوا سمندر موجود ہے۔ صحت و صفائی لازم وملزوم ہیں۔ صفائی صحت کے لیے بڑی اہمیت کی حامل ہے۔ مقولہ ہے کی صفائی ہے تو خدائی ہے۔ آج ایک صحت مند معاشرے کے قیام کے لیے جتنی صفائی کی ضرورت ہے کسی اور چیز کی نہیں ہے۔ انسان کی صحت درست ہوگی تو دماغ بھی درست ہوگا اور اگر صحت درست نہ ہوگی تو دماغ بھی درست سمت کا تعین نہیں کر سکے گا۔ جس ادارے میں صحت مند طلباء کی تعدادزیادہ ہوگی اس کے نتائج بھی دیدنی ہوںگے۔ روزانہ غسل، مسواک اور صاف ستھری وردی پہن کر آنے والا طالب علم پورا دن چاک و چوبند رہتا ہے۔ پورادن مستعد رہ کر اپنی پوری توجہ اسباق میں دیتا ہے، ہوم ورک با قاعدگی سے کرتا ہے، اس کی صحت...
The objective of this study was to investigate the differences in the level of trust in close interpersonal relationships among first born and last-born individuals. The sample of the present study was comprised of 120 participants (first born=60; last born=60). Data was collected through purposive random sampling. The age range of the participants in the present study was 20-45 years and both genders were given equal representation. Trust level of the participants was measured through Trust in close interpersonal relationship scale. Personal Information Questionnaire was also used to gather the information about the characteristics of participants such as age, birth ordinal, gender, education etc. It was hypothesized that there would be significant differences in the trust level of first born and last born. Findings revealed significant differences in the trust level of first born and last-born participants. Last born participants have more trust in interpersonal relationship. Gender differences were also found in the trust level. Females have more trust than males. The implications of the study have discussed in terms of child-rearing practices.
La0.2Sr0.25Ca0.45TiO3 is a carefully selected composition to provide optimal processing and electrical characteristics for use as an anode support in solid oxide fuel cells (SOFCs). In the present study, the optimization of the preparation process of A-site deficient perovskite, La0.2Sr0.25Ca0.45TiO3 (LSCTA-) powders and their characterization for integration into the SOFC anode supports have been focussed. LSCTA- powder was investigated in different yet connected important aspects using high-tech methods like tape casting, microstructure optimization and testing in symmetrical and button cell set ups. The major part of the present research deals with the process optimization of LSCTA-. A modified Pechini method was successfully applied to produce single phase perovskite at 900 oC. The effect of calcination temperature on the phase, morphology and sintering characteristics was studied using XRD, SEM and dilatometry techniques. The optimal calcination temperature of 1000 oC was selected for further studies as the powder calcined at this temperature displayed a similar sintering profile to commercial 8 mol% yttria-stabilized zirconia (YSZ), the typical choice for electrolyte. LSCTA- showed an n- type conduction nature where conductivity of a dense LSCTA- specimen sintered in air increased by three orders of magnitude after in-situ reduction in 5% H2/Ar. These encouraging characterization results supported the SOFC anode candidateship of LSCTA-. In the second part of study, the synthesized powder was processed in aqueous tape casting which is a quick and rapid technique to fabricate thin SOFC anodes. Slurry formulation was optimized for both the dense and porous green tapes. The rectangular bars fabricated from green tapes by lamination were sintered and tested for conductivity measurements using van der Pauw set up. The effect of ceria impregnation on the conductivity of porous LSCTA- bars was studied. The conductivity behaviour of porous bars under redox cycling showed a two-stage process that exhibited strong reversibility. For the reduction process, addition of impregnated ceria reduced the onset delay period and increased the apparent rate constant, k values by 30-50% for both stages. The co- impregnation of Ni further resulted in an increase of conductivity of porous bars. Another aspect of the study was the microstructure optimization of LSCTA- tapes. To introduce the porosity in LSCTA- tapes, commercial pore formers like graphite, polymethylmethacrylate (PMMA) and glassy carbon (GC) were used. It was observed that pre-sintering the powder helps to get a good microstructure with commercial pore formers. An interesting feature for inducing porosity in LSCTA- tapes was the synthesis of homogeneous and well dispersed carbon micro spheres (CMS) from an optimized hydrothermal method and their further application as pore formers. As a part of the research, the anode performance of LSCTA- was tested in YSZ electrolyte supported symmetrical cells. The effect of impregnates like ceria (CeO2), gadolinium doped ceria (CGO), with and without Ni, on the performance of symmetrical cells was investigated. It was found that co-impregnation of CeO2 and CGO with Ni have pronounced effect in decreasing the impedance of bare LSCTA- in symmetrical cells. Further, the anode performance was tested in button cells using a three electrode set up. A significant improvement in cell performance could be achieved by optimizing the anode support with various impregnates both qualitatively and quantitatively. Finally, LSCTA- was doped at B site with Ni (LSCTN) and Fe (LSCTF). The doped compositions offered higher conductivity values than the parent LSCTA-. Compared to pre-reduced LSCTA- having conductivity of 38 S cm-1, the pre reduced 5% Ni doped LSCTA- (LSCTN-5) and 5% Fe doped LSCTA- (LSCTF-5) offered conductivity values of 47 S cm-1 and 66 S cm-1 at 880 oC, respectively. In conclusion, structurally stable LSCTA- could be a good alternative to state of the art SOFC anode exhibiting good mechanical, morphological and electrical properties. Catalyst introduction via impregnation or doping could enhance the electrical and catalytic properties of these perovskites making them viable alternatives for electrochemical applications.