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Dissertations / Theses on the topic 'Total heterotrophic bacteria count'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Owens, James Hudson. "DISINFECTION KINETICS FOR A CHLORINE-RESISTANT FRACTION OF INDIGENOUS HETEROTROPHIC PLATE COUNT BACTERIA IN OHIO RIVER WATER." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1029506971.

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2

Walter, Sunette. "Characterization of heterotrophic plate count (HPC) bacteria from biofilm and bulk water samples from the Potchefstroom drinking water distribution system / by S. Walter." Thesis, North-West University, 2009. http://hdl.handle.net/10394/4977.

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The presence of heterotrophic plate count (HPC) bacteria in drinking water distribution systems is usually not considered harmful to the general consumer. However, precautions must be taken regarding the immunocompromised. All water supply authorities in South Africa are lawfully required to provide consumers with high-quality drinking water that complies with South African-and international standards. This study mainly focused on the isolation, identification and characterization of HPC and other bacteria from biofilm-and bulk water samples from two sampling points located within the Potchefs

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3

Venter, Leandra. "Presence of potentially pathogenic heterotrophic plate count (HPC) bacteria occurring in a drinking water distribution system in the North-West Province, South Africa / by Leandra Venter." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4380.

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There is currently growing concern about the presence of heterotrophic plate count (HPC) bacteria in drinking water. These HPC may have potential pathogenic features, enabling them to cause disease. It is especially alarming amongst individuals with a weakened immune system. South Africa, the country with the highest incidents of HIV positive individuals in the world, mainly uses these counts to assess the quality of drinking water in terms of the number of micro-organisms present in the water. These micro-organisms may be present in the bulk water or as biofilms adhered to the surfaces of a d

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4

Mockaitis, Jonas. "Somatinių ląstelių bendrojo bakterinio užterštumo ir kitų kokybės rodiklių kitimo žaliaviniame piene dinamika vidurio Lietuvos pieno perdirbimo įmonėse." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050413_101525-53587.

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Introduction. Milk is one of the most important economies of the country. In 2002, milk contained 20% of the total value of agricultural economy products, and more than 30% of the total value of export of agricultural economy and alimentary products. Milk is going to stay the underlying branch of agricultural economy in the future. Today, 95.5 % of all Lithuanian farms have 1-4 cows. These farms contain 74.7% of the total number of cows. This producer group is the biggest and most problematic, because its contribution to production of milk is very important. It is important to emphasize, tha

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5

Helstad, Amanda. "Application of Flow Cytometry for Slow Sand Filters." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157760.

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This project investigated the bacteria in water entering and leaving the slow sand filters at Ringsjö Water Works using flow cytometry. The purpose was to explore the possibility of utilising flow cytometry as a monitoring method for optimising water production using slow sand filters. Data describing the bacterial community in water was collected over seven weeks and analysed with FlowJo, flow cytometric image comparison and Minitab. The total cell count, intact cell count and the percentage of high nucleic acid bacteria were analysed. These parameters were highly dependent on scraping events

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6

Palmer, Hilary R. "Bottle water storage location and its impact on microbiogical quality." Honors in the Major Thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1304.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering and Computer Science<br>Environmental Engineering

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7

Zechmeisterová, Lucie. "Faktory ovlivňující kvalitu červeného vína." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216207.

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In my thesis, I focused on monitoring of microorganisms in the sample of red grape juice and on the interactions between yeasts, bacteria and filamentous fungi. Three different media were applied for the cultivation of microorganisms; firstly for monitoring of total volume of microorganisms, secondly for yeasts and third time for lactic acid bacteria. The indirect method was used for the determination of the amount of viable cells. This method consists in enumerating of visible macroscopic colonies grown up on agar plates. When the cells grew up, the forms of colonies were analyzed visually an

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8

Coetzee, Ilsé. "Antibiotic resistance in triclosan heterotrophic plate count bacteria from sewage water / Ilsé Coetzee." Thesis, 2015. http://hdl.handle.net/10394/14910.

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The concentration of triclosan in antiseptics, disinfectants and preservatives in products exceeds the minimal lethal levels. Extensive use of triclosan and antibiotics results in bacterial resistance to their active ingredients. The precise relationship between use and resistance, however, has been challenging to define. The aim of the study was to identify and determine antibiotic resistance profiles of triclosan tolerant heterotrophic plate count bacteria isolates from sewage influent and effluent. R2 agar supplemented with triclosan was utilised to isolate the triclosan resistant bacteria.

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9

Pavlov, D. N. (Dobromir Nikolov). "Determination of cytotoxicity and invasiveness of heterotrophic plate count bacteria isolated from drinking water." Diss., 2002. http://hdl.handle.net/2263/29052.

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Heterotrophic plate counts (HPCs) are commonly used to assess the general microbiological quality of drinking water. Drinking water quality specifications world-wide recommend HPC limits from 100 to 500 cfu.m1-1. However, a number of recent studies revealed evidence that commonly used indicator bacteria may not be as harmless as generally accepted. It appears that immuno-compromised individuals, which represent increasing components of many consumer populations, are particularly at risk. This would include the very young and very old, patients with diseases such as AIDS, and patients on therap

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10

Prinsloo, Rachel Magrietha Petronella. "Potential pathogenicity of heterotrophic plate count bacteria isolated from untreated drinking water / Rachel Magrietha Petronella Prinsloo." Thesis, 2014. http://hdl.handle.net/10394/11947.

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Water is considered the most vital resource on earth and its quality is deteriorating. Not all residents living in South Africa‘s rural areas have access to treated drinking water, and use water from rivers, dams, and wells. The quality of these resources is unknown, as well as the effects of the bacteria in the water on human health. The heterotrophic plate count (HPC) method is a globally used test to evaluate microbial water quality. According to South African water quality guidelines, water of good quality may not contain more than a 1 000 coliforming units (CFU)/mℓ. There is mounting evid

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11

HLAVÁČOVÁ, Nora. "Mikrobiální jakost syrového kravského mléka ve vybraných chovech." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-44834.

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Graduation theses were inquired into question of presence of total bacteria count (TBC) in four selected cattle-raising. The breeds differ from each other with technology of lairege and milking, predipping, grazing and herd size. The first was lairage in stanction housing and in-stall milking pipeline system and embodied average values TBC from 10 {$\bullet$} 103 {$\bullet$} ml-1 till 179 {$\bullet$} 103 {$\bullet$} ml-1. The second breed was lairaged in loose grate without littered housing and got milking parlour and embodied average values TBC from 5,5 {$\bullet$} 103 {$\bullet$} ml-1 till 6

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12

HAVRÁNKOVÁ, Iveta. "Mikrobiologická jakost syrového kravského mléka." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-174208.

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The microbiological quality of raw milk from the perspective of the health of dairy products is one of the most important features. The amount of microorganisms is influenced by storage temperature and time of milk. In the thesis was observed dynamics of total bacteria count (TBC) in raw milk depending on the selected factors (months, seasons, point of collection, the length of storage). To life of microorganisms contributes warm weather. The largest increase in TBC was observed in the months of April and May to 108 thousand /1 Ml. It is necessary to place great emphasis on rapid cooling of mi

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13

Chu, Pei-Hsuan, and 朱珮璇. "A Study on the Assurance Method of Total Lactic Acid Bacteria Count and Species in Probiotic Products Based on 16S rDNA Viability PCR and DnaK PCR-RFLP." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/23284949123487111889.

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碩士<br>國立宜蘭大學<br>食品科學系碩士班<br>102<br>Many lactic acid bacteria (LAB) have been reported having bioactivities and widely used in health foods. However, many commercial probiotic products are mislabeled with wrong bacteria species and having insufficient count. Therefore, it is necessary to develop a reliable identification method for LAB. With the development of molecular biology techniques, using gene sequences for identification have received more attention nowadays. This study found that 16S rDNA and 16S-23S rDNA intergenic spacer region (ITS) could not be used to distinguish closely related s

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14

BEEROVÁ, Michaela. "Vliv přerušení chladírenského řetězce na růst mikroorganismů v mléce." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-251893.

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Raw milk is one of the most monitored product not only in terms of microbial, but also in terms of technology, chemistry and sensory. The aim of the thesis was the examination of the influence of cold chain interruptions on dynamic of total bacteria count (TBC) in raw cow milk. The results show that the temperature and time have a significant impact on TBC. The samples stored during the first three hours of experiment at 15 °C showed (in time 0 - 27 hours) a continuous growth with changing dynamic (5.13, 6.66, resp. log CFU/ml). The samples stored at 30 °C showed a significant increase, howeve

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15

Хомякова, Альона Олександрівна. "Санітарно-екологічний стан Гребного каналу м. Запоріжжя". Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/1501.

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Хомякова А. О. Санітарно-екологічний стан Гребного каналу м. Запоріжжя : кваліфікаційна робота магістра спеціальності 101 "Екологія" / наук. керівник Н. І. Костюченко. Запоріжжя : ЗНУ, 2020. 60 с.<br>UA : Дана робота викладена на 60 сторінках друкованого тексту, з них 46 сторінка основного тексту, містить 8 таблиць, 1 рисунок та 2 додатки. Перелік використаної літератури включає 51 джерел, з них 1 латиницею. Метою даної роботи було оцінити вплив рекреаційного навантаження на санітарний стан Гребного каналу (м. Запоріжжя) за фізико-хімічними і мікробіологічними показниками та рівень загальної

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