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Home > Expression Analysis of Snai1/Snail in Breast Cancer Tissue of Pakistani Female Patients

Expression Analysis of Snai1/Snail in Breast Cancer Tissue of Pakistani Female Patients

Thesis Info

Author

Ahmad Khan

Department

Department of Biochemistry, QAU

Program

Mphil

Institute

Quaid-i-Azam University

Institute Type

Public

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2013

Thesis Completion Status

Completed

Page

84

Subject

Biochemistry

Language

English

Other

Call No: DISS/M. Phil BIO 3250

Added

2021-02-17 19:49:13

Modified

2023-02-19 12:33:56

ARI ID

1676715164410

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در د کو در د نہیں میں نے دوا مان لیا

درد کو درد نہیں میں نے دوا مان لیا
زہر کو زہر نہیں میں نے شفا مان لیا

تو نے جو مجھ کو محبت میں سزائیں دی ہیں
میں نے ایک ایک سزا کو بھی جزا مان لیا

کفر اسلام میں انسان کو سجدہ کرنا
مذہبِ عشق نے اس کو بھی بجا مان لیا

ہے یہ کیا مجھ کو بتائیں گے فتاویٰ والے؟
سنتے ہیں قیس نے لیلیٰ کو خدا مان لیا

تیرے ہر درد کو سمجھا ہے عنایت تیری
تیرے ہر زخم کو تائب نے عطا مان لیا

اخفائےمعانئ قرآن اوراشتراکِ لفظی جديد

Last revelation namely al- Quran has addressed the human beings in an eloquent way using all types of expressions and diction. The divine method of articulation for holy commandments is miraculous and opts all appealing techniques of communications that also includes use of homographs and metaphors. The word that are spelled the same but have different meaning are called Homographs. The reciter andreader of the Quran faces some difficulty in deciding the meaning of a Homographs used in the Quran that leads to difference of opinions. In the books of Quranic Sciences this term is called Mushtarak al –Lafzi. The article has been aimed to elaborate what is Mushtarak al –Lafzi and what are the impact of vagueness originated from these words of the Quran on Quranic exegesis. Some examples have been produced fromthe books of Quranic Studies regarding its influence on exegetical literature.

Shell Side Direct Expansion Evaporation of Ammonia on Plain Tube Bundle With Inlet Quality and Exit Superheat Effects

Shell and tube heat exchangers are widely used for various industrial refrigeration applications. There is no data available in open literature on the direct expansion evaporation characteristics of refrigerants on the shell side of tube bundle. With the current Ozone Depletion and Global Warming issues it is critical to develop systems with low charge refrigerants especially with natural refrigerants such as ammonia which has zero Ozone Depletion Potential (ODP) and zero Global Warming Potential (GWP). A comprehensive literature survey has been presented to summarize previous single phase correlations for estimating heat transfer coefficient inside circular tubes and studies performed with ammonia boiling outside single tube and bundles and the correlations thereof developed. Considerable amount of work has been performed and correlations developed for estimating heat transfer and pressure drop in smooth circular tubes for single phase flow. There are limited studies available on pool boiling and spray evaporation of ammonia outside single tube and bundle. As of now, there are no studies available in the open literature on the subject of direct expansion evaporation of refrigerants. The basic purpose of the present study is to quantify the effects of various parameters such as saturation temperature, heat flux, inlet quality and degree of exit superheat on the heat transfer performance for ammonia boiling on the shell side of tube bundle under direct expansion mode, and to develop empirical correlations. Overall performance of the heat exchanger and performance of individual passes are also studied. The design and details of the single phase and two phase experimental setup, instrumentations, data acquisition system and test heat exchanger are described. Single phase experiments were performed to develop single phase correlations for specific geometry and flow conditions for estimating heat transfer coefficient inside tube bundle using simple Wilson plot and modified Wilson plot method. Prandtl number was varied from 10 to 20, with Reynolds number ranging from 3000 to 15000. The correlations developed are compared vii with existing single phase correlations and were found to be in good agreement with the previous studies. Two phase experiments were performed at steady state conditions with ammonia boiling on the shell side of heat exchanger, while water/glycol solution flowing in the tubes. Saturation temperature was varied from -1.7 to -20 , inlet quality was varied from 0 to 0.3, and heat flux was varied between 5 and 45 , with exit degree of superheat ranging from 2 to 10 . Heat transfer coefficient was observed to increase with saturation temperature and heat flux and decrease with exit superheat (quality) because of the diminishing effect of boiling and dominance of single-phase sensible regime. The effects of inlet quality on the average bundle performance were found to be negligible. Heat transfer coefficient slightly decreased or remained unchanged with inlet quality. The quality effects were found to be more dominant at higher saturation temperature than at lower saturation temperature. Bundle effect was observed between the passes which was a function of saturation temperature, heat flux and exit degree superheat. The present data suggests that bundle effect is less significant at low heat flux, with lower degree of exit superheat. The variations in heat transfer coefficients of individual passes are usually smaller under these circumstances. At higher exit degree superheat and heat flux the upper tubes experienced greater dry out which resulted in a sharp drop in their performance. The trend was similar across the saturation temperature range. The effects of exit degree of superheat became more dominant on the bundle performance over heat flux when ammonia was subjected to vapor quality at the inlet of the evaporator. With increase in the inlet quality the performance of lower three passes converge. Two phase pressure drop under direct expansion mode was found to be sufficiently small. The effects of saturation temperature and inlet quality on pressure drop were negligible. Pressure drop marginally increased with decrease in the degree of exit superheat and with increase in the heat flux.