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Synthesis of Nanodiamonds for Nanocomposite Applications

Thesis Info

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Author

Iqbal, Saman

Program

PhD

Institute

University of Engineering and Technology

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Physics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/12813/1/Saman_Iqbal_Physics_HSR_2018_UET_Lahore_13.09.2018.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727488081

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The aim of the project is to design and develop a cost-effective and mass productive microplasma facility for the synthesis of Nanodiamonds (NDs) and their composites for the water purification. In order to produce microplasma, electrode assembly consisting of an array of hollow capillary cathode and a stainless steel mesh anode were fitted in a chamber which was attached with a gas flow system. NDs were formed by dissociation of gas mixture using this microplasma facility. Ethanol is chosen as a carbon precursor and argon as a carrier gas. A mixture of ethanol and argon has been dissociated in microplasma to form NDs. However, the addition of hydrogen is to enhance the quenching, etching, and stabilization of NDs. Initially, the focus was to find an effective root for the introduction of hydrogen in microplasma. hydrogen is introduced either directly or indirectly into the microplasma. Availability of high amount of atomic hydrogen and presence of argon makes the indirect dilution more efficient as compared to direct dilution. The next step was to explore the suitable flow rate of indirectly inserted hydrogen as flow rate is an important parameter to control the structure and properties of NDs. Therefore, the experiments were carried out at hydrogen flow rates of 3 and 5 L/min out of which 3 L/min was found to be better as flow rate for as the quality of the NDs are concerned. It was also attempted to produce NDs without the introduction of hydrogen. For this purpose, the experiments were carried out without hydrogen for different argon flow rates ranging from 3 to 9 L/min. Amongst all, 6 L/min appears to be the best flow rate for the growth of smallest size and near stress free NDs. It was established that NDs can be fabricated even without the hydrogen. The synthesized NDs (with and without hydrogen) were characterized by various diagnostic techniques. Raman spectroscopy and X-rays Diffractometer were utilized for structural analysis. Atomic force microscopy was used for surface morphology of NDs. The Optical characterization of NDs has been determined through UV-Visible absorption and Photoluminescence spectroscopy. The details of the functional groups present at the surface of the NDs has been investigated using Fourier Transform Infrared Spectrophotometer. The NDs produced at the optimized carrier gas (argon) flow rate of 6 L/min. are of best quality which were then utilized as a nanofillers to fabricate polymeric and metallic nanocomposites. Polyvinyl Alcohol (PVA) and silver (Ag) are used as polymer and metal matrix, respectively. The purpose of fabrication PVA-NDs and Ag-NDs composites was to utilize them for antibacterial applications PVA-NDs are prepared by solution casting method. XRD confirms that the intensity of PVA diffraction peak decreases with increasing content of NDs. The absence of NDs peak confirmed the homogeneous mixture PVA and NDs. Antibacterial activity has been evaluated against E-coli and S-aureus. PVA-NDs exhibits higher antibacterial activity than PVA. PVA-NDs composite could be a promising candidate for safe antibacterial packaging Silver nanoparticles (Ag-NPs) and Ag- NDs composites have been synthesized by microplasma techniques. Raman spectra confirm the formation of Ag-NPs and it also indicate the presence of both Ag and NDs in Ag-NDs composite. NDs act as seed and increases the Ag+ ion reduction. Thus, a core (NDs) shell (Ag) composite is obtained. Antibacterial activity of Ag-NDs composites have been tested against E-coli and S-aureus. An improvement in antimicrobial properties of Ag- NDs composite as compared to that of Ag has been observed. The enhanced antibacterial activity of the Ag-NDs composite makes it a potential candidate for water purification. Therefore, the water filtrates (fiberglass, cation resin, zeolite, anion resin and sand) were coated with Ag and Ag- NDs composites. XRD and EDX analyses confirm the coating of Ag and Ag-NDs on the filtrates. Tap water has been taken from Sabzazar, Lahore, Pakistan. Physicochemical properties of Tap water before and after incorporation of Ag and Ag-NDs coated filtrate were evaluated by standard methods. NDs reduced the pore size of filtrates. NDs improved the binding of silver to the various filtrates. The decreasing trend of total dissolved, total suspended solids, hardness and turbidity was more pronounced for Ag-NDs composite filtrates as compared to Ag coated filtrates. Antibacterial activity has been performed with black water taken from main sewerage line. Antimicrobial properties of Ag and Ag-NDs coated filtrated black water were investigated using total fecal coliform bacteria. Ag-NDs coating has positive effect antibacterial properties of water.
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یونس فریدی کی غزل گوئی

یونس فریدی کی غزل گوئی
اردو کے شعری منظر نامے پر نظر دوڑائی جائے تو معلوم ہوتا ہے کہ دیگر تمام اصناف ادب اپنی جگہ اہم ہیں مگر غزل کی اہمیت وافادیت مسلمہ ہے۔ یہی وجہ ہے غزل کو مقبول ترین صنف کا درجہ حاصل ہے۔ رفیع الدین ہاشمی غزل کی تعریف ان الفاظ میں کر تے ہیں:
’’غزل کے لغوی معنی عورتوں یا عورتوں کے متعلق گفتگو کرنا ہیں۔ ہرن کے منہ سے بوقت خوف جو درد ناک چیخ نکلتی ہے اسے بھی غزل کہتے ہیں۔ اس نسبت سے غزل وہ صنف شعر ہے جس میں حسن وعشق کی مختلف کیفیات کا بیان ہو اور اس میں دردوسوز بہت نمایاں ہوــ‘‘۔(۱)
اردو کی کئی شعری و نثری اصناف مغربی ادب سے ماخوذ ہیں۔ لیکن غزل اردو کی وہ صنف سخن ہے جو خالصتاً برصسغیر میں پروان چڑھی اور جس نے فارسی غزل سے استفادہ کیا۔ دیگر شعری اصناف کی طرح غزل کسی تسلسل کی محتاج نہیں بلکہ اس کا ہر شعر علیحد ہ مفہوم لئے ہوتا ہے اور ایک شعر دوسرے شعر سے مختلف مضمون بیان کر رہا ہوتا ہے۔ ایک غزل ایک ہی بحر میں کہی جاتی ہے اور غزل کے لئے مطلع کا ہونا بھی لازمی قرار دیا گیا ہے۔ اولین دور میں غزل کے اشعار کی تعداد کوتوملحوظِ خاطر رکھا جا تا تھا۔لیکن اب جد ید شعری روایات میں غزل کے اشعار کم یا زیادہ لکھنے کی قید یا پابندی نہیں۔ غزل کا پہلا شعر مطلع کہلا تا ہے۔ جبکہ آخری شعر جس میں شاعر اپنا تخلص استعمال کرتا ہے اسے مقطع کہتے ہیں۔ غزل کسی خاص یا مخصوص خیالات و مضامین کے حامل اشعار کی قید میں نہیں ہوتی بلکہ حسن وعشق ، دردو غم ،ہجر و وصال کے علاوہ مذہبی، سیاسی، سماجی اور فلسفے پرمبنی خیالات بھی اپنے اندر...

مولانا محمد ادریس کاندھلوی کی تفسیر

In Sciences of Hadith Modhog )"refer to the narrations originating from some narrators by self or from those narrators who had been found, with solid arguments, telling a lie rather than from other well-accepted sources that quote the prophet Muhammad (SAWS), his Sahaba or Tabieen. These wrongly attributed "traditions" got mingled with the Islamic Literature from various sources and the people used to quote them from one another without being properly probed and analyzed. During the era of the compilation of tafa'asir of the Holy Quran, some Arabic commentators mistakenly quoted those traditions in their respective tafa'asir. Many tafa'asirs contain a large number of such traditions. Some Urdu tafa'asirs relied upon Arabic tafa'asirs without analyzing those traditions and quoted them. Tafsir Maarif ul Quran is also one of those referred tafa'asirs. It is a need of the day that the research scholars in Islamic Studies should focus on this issue and all these tafa'asirs should be carefully analyzed and made free from baseless "Modhug Traditions". This research effort is an attempt to give a base for analyzing such traditions and to protect Islamic literature from the Modhog traditions

Comparative Phenotypic Characterization, Performance and Antibody Response in Naked Neck Chicken

The study was executed to compare, characterize and evaluate the growth performance, carcass characteristics, meat composition, phenotypic characterization, morphometric measurements, egg production, egg characteristics and hatching traits in four different phenotypes (black, white black, light brown and dark brown) of Naked-Neck chicken located in Pakistan. This study comprised of two major experiments. In first experiment, a total of 320 sexed day old chicks (160♂, 160♀) comprising 80 from each phenotype, were randomly assigned to 8 treatment groups, in a 2 (Sexes) × 4 (Phenotypes) factorial arrangement under completely randomized design. Each treatment was replicated 5 times with 8 birds in each. Live weight (g), time of gains(g), total gain(g), feed intake(g), feed conversion ratio and livability% were evaluated at the age of 8 weeks. The data were analyzed by using ANOVA technique under completely randomized design (CRD). The results showed significantly higher live weight, total gain and better FCR in light and dark brown phenotypes, whereas time of gains was found to be higher in dark brown. Feed intake and livability remained similar in all phenotypes. Keel length and shank circumference measurements were higher in dark brown whereas wing spread was greater in light brown phenotype. Drumstick circumference and body length were same in all phenotypes. Phenotypic characterization was done at the age of 20th week and based on head appearance, comb type, wattle size, plumage pattern, shank color, spurs prevalence and number of toes and were analyzed in terms of frequency and percentages. The results showed that males and females of all phenotypes had plain head and single comb. Wattle size was medium in females while highly developed in males. Over all plain feather pattern was most frequent on breast, wing bow, wing bar, wing bay, saddle and tail followed by stippled, penciled and laced. Males had most frequent yellow shanks followed by grey, off-white and green; however, females had maximum grey shank color followed by yellow, green and off white. White black, light and dark brown phenotypes expressed maximum yellow shank coloration whereas grey shanks were most frequent in black birds. However, morphometric characterization was based on Neck length (cm), keel length (cm), wing span (cm), shank length (cm), shank circumference (cm), drum stick length (cm), drum stick circumference (cm) and body length. The results showed significantly higher morphometric measurements in males than females. Light and dark brown phenotypes had higher measuring values of quantitative traits than those of black and white black. All males and females of different phenotypes possessed four toes, normal spurs and tuft feathers on the ventral portion of the Neck above crop. Regarding carcass characteristics, live weight (g), dressing%, liver weight%, gizzard weight%, heart weight%, intestinal weight%, intestinal length (cm) and antibody response against Newcastle disease virus (NDV) were studied. The results showed significantly higher live weight (g), dressing%, liver weight% and intestinal length (cm) in males whereas gizzard weight% and intestinal weight% was found to be greater in females. Among different phenotypes, light brown plumage color birds indicated significantly higher live weight (g) and dressing% whereas black plumage color birds showed higher intestinal weight%. Antibody response was significantly higher in females as compared to male birds. Among different phenotypes light and dark brown phenotype exhibited significantly higher NDV titer as compared to black and white black phenotype birds. Regarding meat composition and cholesterol contents, results depicted significantly higher dry matter%, crude protein%, ash% and cholesterol content(mg/100g) in males whereas ether extract% and moisture% were found to be higher in females. Among different phenotypes, dry matter% was found to be higher in white black, crude protein% in black, white black and dark brown phenotypes moisture% in light brown and cholesterol content in black plumage color birds, whereas ether extract% and ash% were observed to be greater in black and white black plumage colored birds. In second experiment, a total, 300 females (20 weeks old) from four different phenotypes (black, white black, light brown and dark brown), 75 from each, were randomly selected from the foundation stock maintained at ICGRC then assigned to 4 experimental groups arranged under Completely Randomized Design (CRD). Experimental groups consisted of four phenotypes. Each treatment was replicated 5 times with 15 birds in each. Production performance, egg geometry, quality and hatching traits were evaluated. The data were analyzed by using ANOVA technique under CRD. The results indicated significantly higher feed intake (g) in white black phenotype, heavier body weight(g) in light brown and dark brown phenotypes whereas, egg production, egg mass, FCR/dozen eggs and FCR/kg egg mass was found to be better in light brown phenotype. Egg weight (g) remained higher in black, light brown and dark brown phenotypes. Egg geometry results demonstrated higher egg weight (g), egg breadth (mm), egg volume (mm2) and egg surface area (mm3) in light brown phenotype whereas egg length (cm) was found to be greater in white black phenotype followed by light brown, dark brown and then black phenotype whereas egg quality showed no difference in various phenotypes of Naked-Neck chickens. While studying hatching traits, results showed significantly higher settable eggs%, fertility% and hatchability% in black, dark brown and light brown phenotypes than that of white black whereas better hatch of fertile% and reduced embryonic mortality% was recorded in black and dark brown phenotypes as compared to white black. Better chick quality was observed in dark brown phenotype followed by light brown, black and then white black. In conclusion, phenotypes other than white black showed relatively higher commercial importance because of their better productive and reproductive performance. Key words: Naked Neck, phonotypic characterization, morphometric, carcass traits, antibody response, meat composition, productive performance, egg characteristics, hatching traits