1.
Isolation Characterization And Growth Optimization Of Starch Hydrolyzing Fungi From Soil Of Livestock Farms
by Saba Sana | Prof. Dr. Aftab ahmad anjum | Dr. Muhammad Nawaz | Prof. Dr.
Material type: ; Format:
print
Publisher: 2014Dissertation note: Abstract Availability: Items available for loan: UVAS Library [Call number: 1898,T] (1).
2.
Development Of Prebiotic Galacto - Oligosaccharide Enriched Buttermilk And Evaluation Of Its Storage Stability
by Hafsa Tahir (2012-VA-584) | Dr. Sanaullah Iqbal | Dr. Muhammad Nasir | Dr. Muhammad Nawaz.
Material type: ; Format:
print
; Literary form:
not fiction
Publisher: 2014Dissertation note: Abstract Availability: Items available for loan: UVAS Library [Call number: 2181,T] (1).
3.
Occurrence Of Bacterial Contaminants In Poultry Meals And Their Antibiotic Resistance Pattern
by Nayyab Tariq (2009-VA-207) | Prof. Dr. Aftab Ahmad Anjum | Dr. Muhammad Nawaz | Dr. Muhammad Nasir.
Material type: ; Literary form:
not fiction
Publisher: 2015Dissertation note: Poultry is the second largest industry after textile industry in Pakistan. Its consumption
rate is very high as compared to other animal protein sources, as it is cheaper as compared to red
meat. To fulfill increasing demand of poultry, poultry production quality must be improved.
Many factors affect poultry production. One factor is feeding process. Efficiency of poultry
production depends mainly on feeding process which influences both the quality and quantity of
the poultry production (Grepay 2009). The rearing of poultry birds on commercial level requires
use of bulk quantities of poultry feed. Poultry feed costs 60-70% of total cost for production
(Sahraei et al. 2012). The main purpose to increase poultry production is to fulfill nutritional
requirements of human population that largely rely on poultry and poultry by products as a
source of protein(Obi and Ozugbo 2007).
Poultry feeds are food materials designed to contain all necessary feed ingredients for
proper growth, meat and egg production in birds (Obi and Ozugbo 2007). It is a mixture of
various components including plant proteins (cereals and by products, grains etc), animal byproducts,
fats, vitamins and minerals (Ravindran 2013). The major component of poultry feed is
protein which is the key component of eggs and meat. Protein sources in poultry feed are of
plant, marine and animal origin. Plant proteins may lack some of the essential amino acids, thus
are incomplete protein. Proteins of animal origin are better growth promoter than protein of plant
origin, but their safety is a concern. Among plant based proteins, soybean and canola meal are
produced in higher amounts worldwide (Alali et al. 2011). The animal protein sources include
poultry, fish, meat bone and poultry by products meal. Poultry meal is derived from clean tissues
Introduction
2
of slaughtered poultry including bone after the moisture and fat have been extracted in the
rendering process. It may contain whole birds excluding feathers (Anonymus 2014). Among all
protein based meals, poultry meals and poultry by products meal are of superior quality and
provide higher protein content than plant, marine and meat based meals (Samli et al. 2006).
Quality of animal feed has gained importance worldwide. The feeds are found to be
associated with infectious or non-infectious hazards, thus influence human health (Sherazi et al.
2015). Poultry feed can act as carrier of animal and human pathogens (Aliyu et al. 2012). Poultry
feed can get contaminated at any point of harvesting, processing, storage or dispersal of feed.
Primary mode of poultry feed contamination is by dust, soil, water and insects. Poultry meals can
be another source of feed contamination. Poultry meals are added in feed as a source of protein.
Feeds of animal origin like poultry meals are richer in nutrients and water as compared to feed of
plant origin thus are found to have higher microbial load, facilitating the multiplication of
bacteria (Kukier and Kwiatek 2011). Inclusion of contaminated meals in feed increases microbial
load of poultry feed. The contamination of poultry feed not only influences appearance and
nutritional value of feed, but also affects animals and human who consumes it (Maciorowski et
al. 2007). The profitability of poultry production can be greatly affected due to the frequency of
feed contamination and the detrimental effects of the aflatoxins on performance of chickens
(Anjum et al. 2011). Poultry feeds have been implicated in several poultry diseases of viral
(Avian Influenza, Newcastle disease), bacterial (Salmonellosis, Infectious Coryza) and fungal
origin. Many human diseases like Traveler’s Diarrhea and Salmonella Paratyphoid fever have
been associated with consumption of poultry birds that contracted infections from poultry feed
(Obi and Ozugbo 2007).
Introduction
3
The poultry industry relies on ready to use poultry feed prepared by feed mills (Arotupin
et al. 2007). Both bacteria and fungi including mycotoxins usually contaminate feed at different
stages of pre or post processing, depending upon the conditions under which it is handled or
stored (D’Mello 2006). Poultry meals mostly get contaminated post rendering process. The
cooking step in rendering process inactivates bacteria, viruses, protozoa, and parasites(Meeker
and Hamilton 2006) . Still presence of contaminants in meals is attributed to post processing
contamination. Many bacterial pathogens reported in feed are Escherichia coli, Erwinia
herbicola, Salmonella spp., Listeria spp., Enterococcus fecalis, Cl. perferingens and Cl.
botulinum (Aliyu et al. 2012; Lateef and Gueguim-Kana 2014) . The contaminated feed results
in excessive activation of immune system and ultimately decreases poultry production and its
profitability (Kukier et al. 2012). In addition to bacterial contaminants, toxigenic fungi have
threatened quality and safety of feed and have caused severe losses to poultry industry in recent
times. Cereals and grains based poultry feed mostly get contaminated with fungi (Kwiatek and
Kukier 2008). Mycotoxin producing fungal genera that are reported in poultry feed are
Aspergillus, Penicillium and Fusarium (Greco et al. 2014).
As Poultry feed is the first step of the food safety chain in "farm-to-fork" model. Contaminated
feed can also serve as a source of antimicrobial resistant bacteria in poultry meat(da Costa et al.
2007). There are many evidences that pathogens in feed are transmitted to humans through
animals and food of animal origin. It can also become source of some human pathogens in
environment. Feed contamination by fungi is responsible for animal mycotoxicoses and through
consumption of contaminated animal food, results in human intoxications (Kukier et al. 2012).
Birds utilizing toxins containing feed are economical loss for farmers and also affects consumer
Introduction
4
health through its residues (Alam et al. 2012). Poultry feeds containing antibiotic resistant
bacteria results in loss of poultry productivity, making treatment of poultry diseases difficult.
Thus quality of animal food directly depends on usage of nutritionally balanced and safe feed.
Among many feed sources used, poultry meals are gaining importance for their higher nutritional
value, but very less work has been done in world particularly in Pakistan to determine
microbiological safety of poultry meals produced. There is the need to determine various quality
parameters which should be followed to ensure production of safe meal. Availability: Items available for loan: UVAS Library [Call number: 2252-T] (1).
4.
Antimicrobial Activity Of Selected Plant Extracts Against Streptococcus Mutans Isolated From Dental Caries
by Iqra Shaukat (2010-VA-287) | Dr. Imran Najeeb | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Streptococcus mutans is gram positive bacteria and present in cocci and chain form. It is
facultative anaerobes, non-motile, catalase negative and non-spore forming, lactic acid bacteria
and normally found in oral cavity (Rao and Austin 2014). S.mutans involve in endocarditis, dental
caries, have ability to adhere to the cardiac tissue and cause chronic infective endocarditis. Caries
is caused of tooth decay and tooth loss in adult and school aged children. Many microorganisms
can cause dental caries namely S. mutans, S.sanguis, s.mitis, S.salivarius and S. sobrinus but
S.mutans have major role in developing of dental caries. Dental caries is major problem around
the globe in these days. Generally it treated with antibiotics. But now a day’s due to increase in
antibiotic resistance, recently plant extracts and plants parts are being in use as treatment and oral
hygiene. It is therefore, present research was designed to analyze the plant extract which having
antimicrobial activity against oral bacteria and have been used traditionally for cleaning the teeth.
Azadirachta indica (Neem), Acacia nilotica (Kikar), Pongamia pinnata (Sukhchein) and
Salvadora persica (Peelu) were used to check the activity against S. mutans. Aqueous and
methanolic extracts of bark were prepared of selected plants. Extract potential against S. mutans
was checked through well diffusion and minimum inhibitory concentration (MIC) assay. Dental
caries samples were collected from different hospitals from Lahore. Twenty five samples were
processed to isolate S.mutans. Out of twenty five samples twenty isolates of S.mutans were isolated
which showed resistance against bacitracin, confirmed by disk method.. Biochemical tests such
as hemolysis test and sugar fermentation tests were also done for the confirmation of S. mutans.
Furthermore, antibiotic sensitive test was performed to check the sensitive pattern of S. mutans All
S. mutans were resistant to oxacillin, cefmetazole and cephaloridine, and sensitive to streptomycin
Summary
50
and gentamycin. S. mutans showed high level of resistance to ceftriaxone (90%), cefixim (90%),
chloramphenicol (65%) and vancomycin (60%), and intermediate level of resistance to
sulfamethoxazole/Trimethoprim (40%) and ciprofloxacin (30%), and low level of resistance to
amoxicillin (25%), delfopristin (25%) ampicillin (20%), fusidic acid (20%) and linezolid (5%).
MIC value for aqueous extract for Salvadora persica, Azadirachta indica, Acacia nilotica,
Pongamia pinnata are 24-48, 3-48,0,180-12 and >48 mg/ml respectively, and MIC value for
methanolic extract are 0.09-12, 3->48, 0.376-6 and 1.5-24 mg/ml respectively. This in vitro study
gives us natural antimicrobial plants which can help us to control dental caries and endodontic
infections. The effects of these extracts might be beneficial if incorporated in tooth paste, mouth
rinses and dental products to reduce plaque and dental caries. Availability: Items available for loan: UVAS Library [Call number: 2508-T] (1).
5.
Evaluation Of Antibacterial Activity Of Ciprofloxacin Alone And In Combination With Diclofenac Sodium Against Different Pathogenic Bacteria
by Mehwish Khan (2014-VA-816) | Dr. Muhammad Adil Rasheed | Dr. Muhammad Ovais Omer | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Antibiotic resistance is an international public health problem as a result of an excessive and indiscriminate antibiotics usage, which has resulted in emergence of MDR microorganisms. This study is designed for the evaluation of antibacterial activity of different dilutions of Diclofenac sodium alone and in combination with Ciprofloxacin by using well diffusion method against bacterial pathogens to improve the quality of life of patients and minimize the chances of infections.
Different dilutions of Diclofenac sodium alone and in combination with Ciprofloxacin were checked for antibacterial activity againstEscherichia coli, Staphylococcus aureus, Klebseilla pneumonia and Salmonella enterica. Three isolates of each bacterium were obtained from Microbiology department, University of Veterinary and Animal sciences, Lahore. The pathogens were tested for their sensitivity to ciprofloxacin, amoxicillin and azithromycin. The sensitivity was checked by disc diffusion method. Their zones of inhibition was measured in mm and compared with the CLSI standards. All the available bacteria were sensitive to ciprofloxacin.
Well diffusion method was used to measure the antibacterial activity of ciprofloxacin. For this purpose, 100 µg of ciprofloxacin was used and three concentrations of 100µg, 200µg and 300µg of diclofenac sodium were used. Diclofenac sodium when used with the ciprofloxacin in higher concentrations, it caused the increase in the zone of inhibition significantly among all the bacteria. Maximum antibacterial activity of drugs combination was seen with E.coliamong all the bacteria.Synergism between diclofenac sodium and ciprofloxacin was found to be statistically significant (P ≤ 0.01) when compared with the individual effects of the ciprofloxacin
Collected data was analyzed by using statistic package for social sciences (SPSS, windows version, Chicago, IL, USA). Analysis of Variance (ANOVA) and descriptive statistics was appliedusing graphpad prism 5.03.
This study indicates that Diclofenac sodium in combination with Ciprofloxacin against Escherichia coli,Staphylococcusaureus, Klebseilla pneumonia and Salmonella entericamay be effective and used as a synergistic combination to achieve more effective outcomes for disease management. This can be experimented further to evaluate these effects and prove to be major leap towards the increasing antibacterial resistance globally.
Availability: Items available for loan: UVAS Library [Call number: 2569-T] (1).
6.
Study Of Effect Of Heat On Aflatoxin Reduction In Chickpea
by Zarmeena Khan (2009-VA-514) | Dr. Zubair Farooq | Dr. Naureen Naeem | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Chickpea (Cicer arietinum L.), also called garbanzo bean or Bengal gram, belongs to the family Fabaceae of class dicots (Lev-Yadun et al. 2000). It is an important legume crop cultivated over an area of 963.0 hectares with a production of about 675.2 tons in Pakistan. It is the most nutritive pulse extensively used as protein addition to starchy diet. The major issue which influences the chickpea is naturally occurring aflatoxins (AFB1, AFB2, AFG1 and AFG2) with AFB1 the most important, toxic and carcinogenic. Aflatoxins (AFB1, AFB2, AFG1, and AfG2) are toxins produced by Aspergillus flavis and Aspergillus parasiticus infecting the agricultural crops. Chickpea is largely contaminated by aflatoxins in Pakistan due to seasonal variations, improper management of grains and contaminated soils. These are dangerous fungal metabolites that impair child development, suppress the immune system, cause cancer and in severe acute exposure death occurs, so it is necessary to estimate its toxicity in public health perspective.
For this purpose present study was conducted to determine the level of aflatoxins in Chickpea samples (Roasted and Unroasted). Samples were collected from different areas of Lahore i.e. Anarkali, Icchra, Model town, Gulberg, Mughalpura,Iqbal Town, Samnabad, Secretriate, Sabza Zar, Wahdat Road, Shad Bagh, Data Darbar, Thokar Niaz Begh, Cantt, Lohari Gate, Outfall Road, Dharampura, Joray Pull, Rehman Pura, Mozang, Faiz Bagh, Akbari Mandi, Liberty, Jallo Morh, Lahore Medical Society, Darogha Wala, Firdous Market, Siddiqia Colony, District Court, Sanat Nagar and also from chickpea vendors. The samples were analyzed by thin layer chromatography (TLC) to check the presence of aflatoxins (B1, B2, G1 & G2). TLC analyses were further confirmed by high performance liquid chromatography (HPLC) to verify the accuracy of TLC. These analyses were performed in the Department of Food Science and Human Nutrition and WTO labs, University of Veterinary and Animal Sciences, Lahore.
Experimental results showed that 60 out of 120 samples were contaminated with four different types of aflatoxins. In other words, 50% samples were found contaminated with aflatoxnis. Aflatoxin B1 was the major aflatoxin found in many samples but aflatoxins B2, G1 and G2 were also identified. Samples were analyzed on TLC method and 5% of contaminated samples were re- evaluated on HPLC technique to get precise results. Out of 120 samples sixty samples (50%) were collected from retail shops and other sixty (50%) samples were collected from street vendors. Each category of sixty samples holds 50% roasted and 50% un-roasted samples. Out of 120 total samples of chickpea 60 samples were taken from vendors with 2 categories of roasted and unroasted while 60 samples were collected from shops with the same categories. In those 120 samples, 60 (50%) were contaminated. From those 60 samples 39 (65%) samples were contaminated with aflatoxin B1. And it was also observed that the aflatoxin contamination level in vendors sample was high as compared to samples collected from shops. Out of 39 AFB1 contaminated samples vendor’s samples included 26 (66.66%) samples and samples collected from shops included 13 (33.3%) samples. In 26 vendors’ samples contaminated by AFB1, 18 (69.2%) samples were un-roasted while 8 (30.7%) samples were roasted. Aflatoxin B2 was present in 14 (23.33%) samples from these 60 contaminated samples, and presents only in both vendors and shops samples i.e. 7 (50%) samples from vendors and 7 (50%) from shops. From these AFB2 contaminated samples 10 samples (71.4%) were un-roasted and 4 samples (28.5%) was roasted. Aflatoxin G1 is also present in 5 samples (8.33%), out of which one sample (20%) was collected from vendors and 4 samples (80%) was collected from shop. From these G1 contaminated samples, 1 (20%) was roasted and 4 (80%) was un-roasted. Aflatoxin G2 is present only in two samples collected from vendors and shops, and we can say that 3.33% samples were contaminated with aflatoxin G12, out of 60 contaminated samples. From above results it is concluded that out of 60 contaminated samples 43 (71.66%) were un-roasted and 17 samples (28.33%) were roasted. After the aflatoxin determination in 60 shop’s and 60 vendor’s roasted and unroasted chickpea samples 5 samples were further processed at home by keeping 1 sample unroasted and 4 samples roasted at time intervals of 5mins,10mins,15mins and 20mins in sand bath. All the samples were free from the aflatoxin contamination except one which was unroasted. AFB1 was present in that sample at its minimum level i.e. 32.16µg/kg.
AFB1 was present more frequently in chickpea samples. Present study will be supportive for the investigation of aflatoxins in chickpea samples. Chickpea is widely consumed all over the world and occurrence of aflatoxins in this commodity is a major concern to human health. The present situation is too much worse about the levels of aflatoxins which are higher than the prescribed limit by the regulatory authorities. It was observed that TLC technique is good for the determination of aflatoxins in developing countries where the facilities of sensitive instruments are not accessible. Furthermore to quantify levels of aflatoxins by using sensitive instruments like HPLC, GC-MS and LC-MS is required for accurate detection of Aflatoxins (B1, B2, G1 & G2) in chickpea samples available in markets to protect the consumers from exposure of aflatoxins high level which are carcinogenic and hepatotoxic.
Availability: Items available for loan: UVAS Library [Call number: 2599-T] (1).
7.
Role Ofprebiotic Galacto - Oligosaccharides In Rehablitation Of Gut Microbiota Distrubed By Antibiotic Therapy
by Toheed Ahmad (2014-VA-545) | Dr. Sanaullah Iqbal | Dr. Azmat Ullah Khan | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: In this research work, GOS was availed by Friesland campina Domo, Vivinal® GOS powder. Galacto-oligosaccride rich in whey product and is white homogeneous powder, neutral to slightly sweet,and were fed to the patients of sore throat who were on antibiotic trial to check the growth of Lactobacillus, Bifidobacteriu, E. coli and total plate count after disturbing micro flora.Then, by using the same concentrations of antibiotic for two group and prebiotics were fed orally to group one which was treatment group and other was control only depend upon antibiotic. After 0, 5, 10 and 15 days the fecal samples were collected aseptically to check the growth of Lactobacillus, Bifidobacterium, E. coli and total plate count. Colony counting was done very to count the colonies.The plates were incubated at 37 ºC and numbers of colonies were counted on digital colony counter. The results showed that treatment groupof Lactobacilli showed significantly high growth of colonies as compared to control group.The two-other bacteria Bifidobacterium and E. coli species were also tested. Bifidobacteriumrecovered back as earliest it was possible due to the consumption of GOS while it was opposite in case of control. In case of control group Bifidobacteria did not recover back to its original condition even on 15th day of sampling.In case of E. coli and Total Plate Count results of colonies counting showed that day 0 and 10 show the maximum growth of bacteria, the day 10 and 15 were also similar in statistically results due to the rapid increment in rehabilitation of gut micro-biota but the situation in E. coli case were little different because microflora’s strains did not much disturbed and E. coli growth were high in both groups as compare to all other bacteria. This was due to the naturally developed immunity of E. coli against antibiotic.Results of control group of total plat count was checked and
it was noticed that the growth of colonies was slow and the results of 0,5,10 and 15 days did match statistically as per requirement.
Availability: Items available for loan: UVAS Library [Call number: 2725-T] (1).
8.
Assessment Of Heavymetal Contaminants From Protein Sources
by Marriam Wasif (2014-VA-216) | Dr. Saif ur Rehman Kashif | Ms. Saman Saad | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Protein is one of the main ingredients of basic need of every human diet. Demand is more
than its production. This shortage is more in underdeveloped countries like Pakistan. Due to
industrial waste, many toxic heavy metals stay within the earth rather than its decomposition.
There is a cycle of circulation of these toxic heavy metals getting back into the tissues or organs
of grazing animals through feeds. (Nawaz, et al. 2015). These toxic heavy metals have no useful
impact on the body but instead, these cause extremely toxic effects even at their lower
concentration. In animal tissues bioaccumulation of heavy metals is hazardous to human health.
Heavy metals which are more likely to be present in animal tissues, are Co, Cr, Cu, Fe, Ni, Zn,
As, Cd, Hg, Pb (Javed, 2005). Other source of contamination is vehicle emission and dirty
slaughter places. Meat especially body tissues, organ of livestock i.e. liver, kidney and stomach
sold by shopkeepers on road side or at open market are more vulnerable for deposition of
metals. (Mariam, et al. 2004). The second source of protein is poultry which has shorter time of
production of meat rather than red meat animals. Its demand in world increases due to reasonable
prices and its nutritive property. (Mahmoud, et al. 2015). The other protein source is hen eggs
which contain a large number of heavy metals which is due to contaminated feed and polluted
water. But still, there are some traces minerals which is very beneficial and nutritive to health
(Rehman, et al. 2013). Last main source of protein is fish, which is more susceptible
contamination of heavy metal. Dangerous level of heavy metals has evident deadly or ceaseless
impacts on fish (Qadir, et al. 2011). Availability: Items available for loan: UVAS Library [Call number: 2751-T] (1).
9.
Comparitive Study Of Biogas Production From Wastewater Sludge Of Tehsil Municiple Administration (Tma) Ravi Town Drains In Lahore
by Hira Khalid (2014-VA-229) | Dr. Saif ur Rehman Kashif | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Global expansion in energy demand has convinced energetic search for alternative energy
sources. Biogas is an energy-rich combination of mainly methane and carbon dioxide and can be
used for active purposes. It is a cheap way to meet energy crises. It is an odorless, colorless and
flammable gas with an energy content of 37.3 MJ/m3. It is produced by process of anaerobic
digestion comprising of three steps i.e. hydrolysis, acidogenesis/acetogenesis and
methanogenesis. Out of the 14 drains in Lahore, sludge samples were collected from Samanabad,
outfall and Gulshan-e-Ravi drains. These samples were analyzed for Electrical conductivity (HI
8633 EC meter), pH (HI 2210 pH meter), BOD5 (HI 9146 DO meter), Total carbon content,
Nitrogen (Kjeldhal’s method), Phosphorus (V-110 spectrophotometer), Potassium (Multichannel
Flame photometer-AFP 100) and Heavy metals (including Cr, Cu, Pb, Zn and Ni by
Polarized Zeeman Z-8230 Atomic Absorption Spectrophotometer).
pH went from 6.37 to 7.66 (from slightly acidic to basic in nature) inside the biogas digesters
while temperature inside the biogas digesters ranged from 26.1°C-32.2°C. Electrical conductivity
of sludge samples varied from 1.38 mS/cm to 2.23 mS/cm and TDS ranged from 883.2 mg/l to
1427.2 mg/l. Carbon content of wastewater sludge ranged from 1.3983 g to 2.3677 g while total
Kjeldhal’s nitrogen varied from 40.6 mg/l to 59.2 mg/l. Nutrients like Phosphorus varied from
15750 ppm to 17250 ppm and Potassium ranged from 602.5 ppm to 9775.5 ppm in sludge
samples. Concentration of heavy metals i.e. Lead (Pb) in sludge samples varied from 2.58 ppm
to 2.94 ppm, Copper (Cu) went from 0.05 ppm to 0.79 ppm, Zinc went from 5.13 ppm to 5.28
ppm, Nickel (Ni) ranged from 0.11 ppm to 0.35 ppm while Chromium (Cr) was not detected in
samples.
Summary
43
Variation in water concentration in the digesters of drain A made a difference of 900.800 ppm in
CH4 concentration, 0.016 % vol of CO2, 0.020 in pH and 1.090 °C in temperature. While
variation in water concentration in the digesters of drain B made a difference of 483.499 ppm in
CH4 concentration, 0.331 % vol of CO2, 0.019 in pH and 0.110 °C in temperature. And in that of
the digesters of drain C made a difference of 238.295 ppm in CH4 concentration, 0.187 % vol of
CO2, 0.015 in pH and 0.490 °C in temperature. Highest methane potential was found in Drain A,
followed by drain B and C. Absence of H2S shows that the biogas produced anaerobically from
the municipal wastewater sludge can be an environmentally friendly source of energy. Availability: Items available for loan: UVAS Library [Call number: 2756-T] (1).
10.
Microbial And Physicochemical Analysis Of Drinking Water Quality Of Government Installed Water Filtration Plants Of Lahore In Comparison With Tap Water
by Syed Mubeen-ur-Rehman (2014-VA-945) | Ms. Isbah Hammed | Dr. Saif-ur-Rehman Kashif | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Water is an important constituent for survival after oxygen. Internationally, hazardous
drinking water passing through poor hygiene kills almost 1.6 million children below the age of
five annually. Various physical parameters that represent the quality of drinking water should be
in safe limit. Heavy metals such as lead (Pb), Arsenic (As), Nickel (Ni), copper (Cu) and
chromium (Cr) have adverse effects on humans. Drinking water should not contain any
pathogenic organism or any bacteria indicating bacterial contamination. Presence of coliforms in
water is considered as bacterial contamination. In this study three filtration plants were selected
randomly from each town three samples of tap water and filtered water were taken after 15 days
respectively. Overall 162 samples were collected for the study. Parameters that were used to
determine the physical characteristics of water were Color, total Hardness as CACO3, Total
Dissolved Solids (TDS) and pH. Chemical characteristics included detection of Arsenic,
Calcium, Chloride, Chromium, Copper. Toxic inorganics included Lead, Manganese, Nickel,
Selenium and Zinc were analyzed. Microbiological quality of water was examined in terms of
Escherichia coli (must not be detectable in any 100 ml sample) and total coliforms (Must not be
detectable in any 100 ml sample). The results observed are as follows: pH of tap water ranged
from 5.56 to 8.49 in tap water while that of filtered water ranged from 7.46 to 8.37, TDS in tap
water varied from 52 mg/L to 1025.3 mg/L while that in filtered water was 217.91 mg/L to
1098.6 mg/L, chlorides in tap water ranged from 47.5 meq/L to 592.8 meq/L while that in
filtered water were from 41.5 meq/L to 520.6 meq/L, Hardness of tap water samples varied from
20.1 mg/L to 260 mg/L while that of filtered water samples were from 40.4 mg/L to 290.9 mg/L,
calcium (Ca) in tap water ranged from 17.8 mg/L to 48.3 mg/L while that in filtered water was
Summary
41
14.7 mg/L to 51 mg/L, Manganese (Mn) in tap water ranged from 0.01 mg/L to 0.19 mg/L while
in filtered water it ranged from 0.01 mg/L to 0.13 mg/L, Zinc (Zn) in tap water samples varied
from 0.01 mg/L to 0.25 mg/L while in filtered water samples it went from 0.01 mg/L to 0.09
mg/L, Arsenic (As) ranged from 0 to 0.05 mg/L in tap water while in filtered water it went from
0 to 0.023 mg/L, Lead (Pb) in tap water ranged from 0 to 0.06 mg/L while in filtered water it
ranged from 0 to 0.01 mg/L, Chromium (Cr) in tap water varied from 0 to 0.6 mg/L while in
filtered water it went from 0 to 0.2 mg/L while Copper (Cu), Selenium (Se) and Nickel (Ni) were
not detected in tap water samples as well as in filtered water samples. 3.7% coliforms were
present in filtered water samples while tap water had 7.4% of total coliforms. 22.2 % E. coli were
present in filtered water samples while 40.7% E. coli were present in tap water samples. Availability: Items available for loan: UVAS Library [Call number: 2759-T] (1).
11.
Evaluation Of The Quality Of Drinking Water In District Dera Ghazi Khan, Pakistan
by Muhammad Akram (2009-VA-458) | Dr. Zubair Farooq | Dr. Sanaullah Iqbal | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2017Dissertation note: In District Dera Ghazi Khan, water borne illnesses had been happening for quite a while
especially hepatitis, diarrhea and kidney issues were occurring because of the heavy metals in
drinking water. To this end, it is important to assess the drinking water of District Dera Ghazi
Khan. One hundred and forty-four samples of drinking water were collected from hand pump,
motor pump and tube well in three different Tehsils of District Dera Ghazi Khan. Heavy metals
like lead, nickel, manganese, copper, iron and zinc concentration in water samples were
determined utilizing Atomic Absorption Spectrophotometer in the department of Environmental
Sciences UVAS, Lahore. pH was determined in the previous department; for microbial quality like
E-coli and Total Coliform in water samples were counted in University Diagnostic Laboratory
UVAS, Lahore. Data were analyzed through one-way ANOVA technique using PROC GLM in
SAS software, significant means were compared by using LSD test. Water quality with respect to
different water sources, heavy metal load remained above the recommended level set by WHO
except Zinc (Zn) and Copper (Cu) which remained significant. Similarly, microbiology showed
25% and 15% above the WHO recommendation of fecal coliforms and E. coli respectively. In
addition, pH also remained above the WHO recommendation. Water quality regarding different
tehsils, heavy metal load remained above the recommended level set by WHO except Zinc (Zn)
and Copper (Cu) which remained significant. Similarly, microbiology showed 20% and 13%
above the WHO recommendation of fecal coliforms and E. coli respectively. In addition, pH also
remained above the WHO recommendation except in tehsil Dera Ghazi Khan.
46
6.1. Suggestion and Recommendation
On the basis of this study, it is recommended that:
Tube well water has the minimum heavy metal load so that it is healthy for human consumption.
Less chances of water borne illnesses (diarrhoea, typhoid and kidney problems) could be observed
by using the tube well water.
Future researchers should also check the level of arsenic and antimony in tube well water to
improve the quality of water for human consumption.
Same treatments should be applied in other districts to check the level of these heavy metals so
that water quality may be improved. Availability: Items available for loan: UVAS Library [Call number: 2806-T] (1).
12.
Evaluation Of Physico-Chemical Properties And Germination Efficiency Of Onion (Allium Cepa) And Cauliflower (Brassica Oleracea) Seeds Grown Under Stress Of Tannery
by Tooba Ayyaz (2014-VA-212) | Ms. Saman Saad | Dr. Saif-ur-Reheman Kashif | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: In the process of rapid urbanization industries are being establishing at a high rate and waste water discharges from these industries are unavoidable and lead to cause water and soil pollution. This water pollution has become a great threat to existence of plants and animals life. Pakistan tanning industry is a major contributor of chromium pollution. There are about 750 tanneries in different provinces of Pakistan and Kasur city has more over 230 tanneries in different areas. In this process different types of waste are released which contain chromium, salts, ammonia and organic compounds and it enters in our food chain through irrigation system and cause serious diseases such as cancer, lungs infection, liver infection and respiratory diseases. Therefore special attention on the management of industrial waste water is needed. The present study was carried out to investigate the Physico-chemical properties of tannery waste water and their impacts on the seed germination of Onion and Cauliflower plants. Samples were collected from Kasur Tannery Waste Management Agency (KTWMA) near Dipalpor road. Seeds were germinated in petri dishes for 14 days under control conditions. Different concentrations of diluted tannery effluents was applied ranges from; 0 %, 10 %, 25 %, 50 %, 75 %, 100 % respectively. All physico-chemical parameters of effluents were analyzed such as Color, odor, EC, pH, TDS, TSS, Na, K, Ca, P, Cl, BOD, CO3 , HCO3, heavy metals Fe, Pb, Zn, Cu, Ni, Zn, Mn, Cr, Mg. At different time intervals rate of germination was measured and morphological parameters of plants were examined such as shoot and root length, fresh and dry weigh, seedling vigor index after harvastation. Antioxidant enzymes such as Catalase, Peroxidase and Superoxide dismutase were estimated. After digestion of seedlings heavy metals
Summary
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such as chromium, iron, copper, zinc, lead, and nickel were determined. SPSS software was used to apply descriptive statistics and ANOVA 1. Results showed that all physico chemical parameters were higher form prescribed values except pH, TDS and Cu recommended by NEQS. All observed parameters of both plants included seed germination, root length, shoot length, seedling length and seedling vigor index, fresh and dry weight strongly depends on concentrations of effluents. All morphological parameters were decreased with the increase of concentrations. Growth of cauliflower seeds was inhibited after T5 treatment whereas in onion plant growth was ceased after T4 treatment. A result of heavy metals showed that amount of chromium was significantly higher in both plants as compared to other metals. Antioxidant assay of enzymes showed that catalatic activity decreases as concentrations of effluents increases whereas Peroxidase and Superoxide dismutase activity increases with the increase of concentrations. Availability: Items available for loan: UVAS Library [Call number: 2737-T] (1).
13.
Leachate Characterization Of Lakhodair Landfill And Coagulation/Flocculation Treatment
by Madeeha Saleem (2015-VA-08) | Ms. Isbah Hameed | Dr. Saif ur Rehman Kashif | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2017Dissertation note: Decomposition of solid waste in landfill site produces highly polluted leachate. In most of the landfill worldwide collection, handling, treatment and disposal are major issues associated with landfill operation. Open, untreated disposal of the landfill leachate poses serious threat to the receiving environment and public health. It also leaches and reaches groundwater polluting the aquifer. Since it is contains huge variety of pollutant or contaminant such as (organic matter, suspended and dissolved solids, heavy metals, persistent organic pollutants etc.), it required adequate treatment before disposal leachate treatment with municipal wastewater is neither required nor can produce efficient and economical results. Coagulation has be found to effectively reduce contaminant loading from leachate, alone and in combination with other method, as applied on leachate taken from different landfill in different studies. This study targeted characterizing the leachate from Lakhodair landfill site on the basis of the selected parameters (pH, EC, Turbidity, TDS, TSS, Hardness, BOD5, COD, Cl-1, Na, K, Ni, Cr, Pb, Mn, Zn, Cu and Fe). Leachate samples were collected from Lakhodair landfill site in plastic bottles, brought to laboratory, preserved and analyze for the above mentioned parameters. Lakhodair landfill site was inaugurated 18 April 2016. Since the leachate was young and the solid waste at Lakhodair landfill site had not undergone acidogenic phase of decomposition, the leachate was slightly alkaline (pH = 8.43) and quite high in organic loading (in term of COD and BOD5), Sodium, Potassium, and few heavy metals like Ni and Cr. High concentrations of some contaminants not studies in the literature (TDS, TSS, EC, Hardness, Turbidity, Chlorides). Other tested heavy metals (Pb, Mn, Cu, Zn, Fe) were found in low concentration due to low solubility at alkaline pH. Leachate samples were subjected to coagulation/flocculation with 0.8, 1.0, 1.2,
SUMMARY
53
1.4, 1.6 g/L of Alum, Ferric chloride and their mixer, and tested for same parameters after treatment. Treatment comprise 5 min rapid mixing, 30 min slow mixing and settling time of one hour. Heavymetals (Zn, Pb, Fe. Ni, Cr, Cu and Mn) have been detected in leachate through Hitachi Z-8230 atomic absorption spectrophotometer. Minerals (Na and K) have been detected by using flame photometer.pH, EC and Turbidity were measured by their respective meters. TSS and TDS were determined by gravimetric method. Titration was used for COD, Hardness and Chlorides. BOD readings were measured by BOD5 Incubator (SAYO MIR-153). Expect for TDS, Hardness, K and Cr the three coagulants responding different to all the tested pollutants, mixed coagulant perform the best giving as high as around 90-100 % removal for many of them. Post-treatment concentrations of all the parameters except TDS were significantly related to the coagulant dose. Since Ferric chloride and mixed coagulants had chlorides in them, they resulted in high post-treatment chloride concentration with increase in their doses while Alum its reduction. Alum and the mixed coagulant cause in increase in TDS while Ferric chloride cause an increase in TSS in the leachate at higher doses. Leachate TSS was maintaining constant at around 800 mg/L at all doses. The coagulant doses show positive correlation with Hardness and EC and negative correlation with pH, Turbidity, BOD5, COD, Na, K, Ni, Cr, Pb, and Mn. % removal from as low as 1.1 – 19.06 for BOD5 to as high as 32.59 – 92.7 % for Nickel was achieved as a result of coagulation. Comparison was made with standards for reuse of leachate in landscape irrigation (as prescribed by JS, 2002 in Annexure IV) and open disposal into inland water or sewage treatment plants (as prescribe in PEQS and given in (Annexure V). Stringent FEPA standard has also be included only for Pb. Comparison with standard shown that coagulation is good pre-treatment option as it has help lowering contaminant load from leachate and meeting PEQS standards for disposal into sewage treatment plant as set in PEQS, but it not sufficient to treat leachate to reuse for landfill irrigation. Availability: Items available for loan: UVAS Library [Call number: 2912-T] (1).
14.
Detection And Quantification Of Staphylococcus Aureus And Salmonella With Special Reference To Seasonal Variations In Commercially Sold Ice Cream In Lahore City
by Waqas Anwar (2009-VA-248) | Dr. Waqas Ahmed | Dr. Azmat ullah Khan | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2017Dissertation note: Ice cream is a yummy, nutritious, nourishing frozen dairy food. It is noticed that generally manufacturing of ice cream on small scale production units like local shops doesn't totally follow the standard procedures of ice cream production. Contamination could be there in ice cream if some ingredients have been added after pasteurization or by means of improper sanitation of the equipment and environment. Microbiological quality of ice cream shows sanitary practice during production and is also an indication of food safety.
Ice cream is now the favorite and most popular diary food product especially among the children. It contains all the basic food components like carbohydrate, fats and protein, so it is a favorite media for microbes to grow. Another reason for microbial growth is the storage time of ice cream. An ice cream has prolonged storage time. Once it contaminated with microbes then freezing temperature and other parameters could not be enough to make the product safer later. At shops, unchecked storage temperature and extended storage time also affects the quality of ice-cream..
Food can be a major source of disease transmission if a person suffering from a disease is handling the food after pasteurization step, so proper knowledge of food safety is must food the handlers. In countries like UK, USA and China, there are standards for every foodstuff and are followed strictly. While in developing countries the major problem is the accessibility to pure and germ free water supply. Illnesses related to food are caused when someone ingest a food containing microbes or their toxins or other chemicals which can cause serious problems.
For this study 50 locally produced samples of ice cream in three different seasons (winter, spring and summer) were carried from different areas of Lahore via convenient sampling. Samples were transported to microbiology Lab of University of Veterinary and Animal Sciences and analyzed for the detection of Salmonella and Staphylococcus aureus.
Each sample was processed for microbiological analysis for Total Staphylococcal Count (TSC) and detection of salmonella spp. Baired Parker agar was used to count S.aureus, Salmonella Shigella agar for Salmonella detection. Out of 50 samples collected in winter season 18 (36%) were positive for S.aureus and all these positive samples falls in unsatisfactory range. Out of 50 samples collected in spring season 22 (44%) were positive for S.aureus and all these positive samples falls in unsatisfactory range. Out of 50 samples collected in winter season 40 (80%) were positive for S.aureus and all these positive samples falls in unsatisfactory range.
Salmonella was not detected in any sample in three seasons.
This study shows that there is a strong relationship between environmental changes and growth of microorganism. With the change in season, percentage of positive samples also changes.
Availability: Items available for loan: UVAS Library [Call number: 2915-T] (1).
15.
Polymorphism Analysis Of Bovine Tumor Necrosis Factor Alpha Gene And Its Association With Mastitis In Nili Ravi Buffaloes
by Samia Tanveer (2011-VA-362) | Dr. Sehrish Firyal | Dr. Muhammad Wasim | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2017Dissertation note: Various number of factors cause hindrance in the milk production potential of buffalos. Mastitis is the costly and most prevalent disease causing production losses of dairy herds in Pakistan and elsewhere in the world. Susceptibility and resistance to mastitis is complex trait influenced by genetic variation of animals. Among these immunity gene variations, the polymorphism in tumor necrosis factor alpha gene (TNF-α) play important role in immune response to virus. Polymorphism in TNF-α gene is associated with mastitis susceptibility and resistance. It would be a potential candidate gene for imparting resistance mastitis in dairy buffalos. Blood sample were taken from the 20 Nili Ravi buffalos having clinical and subclinical mastitis. Extraction of DNA was done from frozen blood after thawing, using organic extraction method & also kit method followed by DNA quantification (i.e. gel electrophoresis and nanodrop). Total 5 primers were designed using Primer3 bioinformatics tool. All these primers were optimized using different protocols and a set recipe was obtained for each primer. The amplification of DNA samples was done one by one using all these five primers on optimized protocol. The amplicons obtained were subjected to agarose gel electrophoresis to check whether we have the required product or not using 100 kb ladder and then amplicones were send for the sequencing.
Summary
110
The sequencing analysis of resulted amplicon sequence was done using Bioinformatics software Finch TV. Total of 6 mutations were found while 5 were same in all the samples whereas 6th mutation was found only in clinical samples. It is valuable in accomplishing genetic progress for resistance and to improve the immune response. This study will paved the way for animal breeder for selection of Nili Ravi mastitis resistant buffalos for breeding. TNF-α gene polymorphism based marker is now available for screening of resistant bulls as well. Availability: Items available for loan: UVAS Library [Call number: 2936-T] (1).
