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Browsing FACULTY OF NATURAL & APPLIED SCIENCES by Issue Date

Browsing FACULTY OF NATURAL & APPLIED SCIENCES by Issue Date

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  • Hindieh, Pascale (Notre Dame University-Louaize., 2020)
    Sexual activity constitute in the life of the adolescent, a risk-taking and possibly health-compromising behavior. Since unfortunately, knowledge about sexuality is often acquired after sexual activity has begun, sexually transmitted diseases (STDs) should be given high priority in health care and in education. Sexual education is an indispensable need, especially for adolescents, in order to protect them from irresponsible and non-conscious behavior. In the areas of adolescent sexual behavior, sexual education and knowledge, it is imperative and of paramount importance that the health-care ...
  • Nassif, Nathalie (Notre Dame University-Louaize, 2020)
    Chronic moderate alcohol consumption has been implicated in promoting bone health in acyclic (postmenopausal) women via increasing bone mineral density. To our knowledge, no studies investigated the potential effects of ethanol on the bone-specific markers osteocalcin and RANKL which are important in regulating osteoblast - osteoclast activity and bone metabolism. Therefore, the aim of the study was to look into RANKL expression in serum and RANKL and osteocalcin expression in the femoral neck following chronic alcohol consumption of 12% v/v ethanol in water in acyclic C57BL/6 mice. Female ...
  • Ghosn, Marc (Notre Dame University-Louaize, 2020-07)
    An extraction protocol for saponins of Styrax Officinalis plant was adopted, modified and successfully applied. The extract obtained was tested by stabilizing Oil-in-Water emulsions. Ethanol extraction and successful one-step partial purification using AB-8 adsorption column chromatography yielded positive colorimetric (Vanillin – Sulfuric Acid) TLC results. The 3D structure of the four Styrax Officinalis saponins reported in the literature were rendered for the first time, and their partitioning properties exclusively acquired using Marvin Sketch chemical drawing software. 10% w/w Sunflower Oil ...
  • Sahakian, Joseph Ohannes (Notre Dame University-Louaize, 2020-09)
    Ceratitis capitata or the Mediterranean fruit fly (medfly) is a highly invasive and destructive pest due to its tolerance of various climatic and environmental conditions as well as broad host range, including hundreds of fruits and vegetables. Medfly has a great economic impact on fruit production, national market and world trade. The population in Lebanon has been on the rise since 2007 due to several factors including optimal climate and host conditions, insecticide resistance, and negligent regulatory and detection measures during fruit harvest and transportation. Medfly infestation in Lebanon ...
  • Malkoun, Marwan (Notre Dame University-Louaize, 2020-09)
    The Dark Ages, a period stretching from 400 thousand years to 400 million years after the big bang, is the least known era in the evolution of our universe, as no visible light was emitted. However, another type of radiation was available, the Hydrogen 21cm. It reaches us at frequencies between 1.5 and 30MHz. The ideal way to detect it, involves antennas placed in a fixed orbit around the dark side of the moon where it is shielded from electromagnetic interference emitted from earth.
  • Dib, Kevin (Notre Dame University-Louaize, 2020-10)
    In this work, Silver Nanoparticles (AgNPs) were synthesized in water using either polymer assisted chemical reduction synthesis method or green synthesis. The obtained AgNPs were characterized by Dynamic Light Scattering (DLS) and UV-visible spectroscopy (UV-vis), and further tested for antibacterial activity to evaluate their potential use in wound healing. At first polyvinylpyrrolidone (PVP 10 KD) and Low-Molecular Weight Chitosan were used as coating agents during the reduction of silver nitrate with a strong reducing agent sodium borohydride (NaBH4). Our DLS results demonstrated that ...
  • Matar, Rana (Notre Dame University-Louaize, 2020-10)
    Pollution has long been a burden to humanity, and among the most prominent types is plastic pollution. Plastics have been an expedient source for human activity and progress, however its large carbon footprint and harmful effects on animals, humans and habitats outweighs its advantages. Despite recycling efforts, plastic’s non bio-degradability continues to harm the environment. Bioremediation has been the most recent endeavor in managing plastic pollution, where recently discovered microorganisms have shown the capacity to break down different types of plastics. This paper highlights all ...
  • Jerdy, Jouliana (Notre Dame University-Louaize, 2020-12)
    Yerba Mate (Ilex paraguariensis) is a beverage that is highly consumed by certain communities in Lebanon. Several studies have shown the benefits of yerba mate consumption on one's health. Also, Lebanese add to their hot drink some medicinal plants that have been acquired by the society from the Arabian folk medicine. Many studies have been conducted, yet little is known about its effect on the Lebanese health, as they have been consuming it for almost 100 years. Therefore, this study was done to assess the use of yerba mate and medicinal plants. A questionnaire was distributed among 200 local ...
  • Yammine, Rebecca (Notre Dame University-Louaize, 2020-12)
    The Lagrange’s Mean Value Theorem is a very important result in Analysis. It originated from Rolle’s theorem, which was proved by the French mathematician Michel Rolle (1652-1719) for polynomials in 1691. This theorem appeared for the first time in the book “M´ethode pour r´esoudre les ´egalit´es” without a proof and without any special emphasis. Rolle’s Theorem got its recogni- tion when Joseph Lagrange (1736-1813) presented his mean value theorem in his book “Th´eorie des functions analytiques” in 1797. It received further recognition when Augustin Louis Cauchy (1789- 1857) proved his mean ...
  • Saliba, Elisabeth (Notre Dame University-Louaize, 2020-12)
    Prostate cancer (PCa) is the most frequent cancer malignancy among men and the third leading cause of cancer death in the developed world. To date, the exact molecular mechanism underlying the role of caffeine one of the major coffee constituents on PCa prognosis is not yet unraveled. Caffeine has many antioxidant, anti-inflammatory and anti carcinogenic properties through the modulation of certain inflammatory markers such as IL-6 and TNF-α. The present study was carried out to evaluate the effect of caffeine on PCa cell lines viability, namely PC3 and PC3-PSMA and assessing as well their ...
  • Merheb, Charbel Michel (Notre Dame University-Louaize, 2020-12-21)
    Technology and educational systems have been going hand in hand over the years, creating various digital examination platforms to further improve and digitize the pen and paper examination process in schools and universities. However, these improvements still offer the same stress and anxiety a student may experience during a pen and paper exam. Virtual reality technology has been making its way to desktop computers and mobile phones and its use has varied between many fields including medical, scientific, and military. In this thesis, the use of virtual reality technology focuses on the education ...
  • Essaye, Anthony (Notre Dame University-Louaize, 2021)
    Quantum Computers, the next wave of computing, and an emerging field in computer science have brought numerous advancements to problem solving and a quantum approach to programming a certain machine. This thesis tackles three main areas in the approach to quantum computers. First, the thesis provides a state-of-the-art review to Quantum computers/ Second it proposes a timeline for the progress of the technology and highlights the importance of early action. Finally, it focuses on the implications of such advancements on the current standards of network security. Specifically, it proposes ...
  • Nader, Ingrid (Notre Dame University-Louaize, 2021)
    Candida albicans, is usually a harmless fungus in healthy individuals, but life-threatening when found in large quantities or in inappropriate parts of the body. It developed resistance against the antifungal drugs fluconazole and amphotericin B, used in an abusive way, by adopting different mechanisms. Medicinal plants, which offer a wide variety of secondary metabolites, especially saponins, have been reported for their large biological activities. These phytochemicals are composed of a hydrophobic part (aglycone) and a hydrophilic one (glycone), which, based on their aglycone part, are ...
  • Daou, Yasmeen Salah (Notre Dame University-Louaize, 2021)
    Eggs are one of nature’s most nutritious and economical foods. Besides their nutritional value, antioxidant, anti‐cancerous, antihypertensive activity, and immunomodulatory effects, chemical and microbial contamination of eggs pose a risk on human health. Chemical contamination is due to the abuse of antibiotics in poultry. Microbial contamination can be through horizontal or vertical transmission. Microbial contamination accompanies a high risk of spread of antibiotic resistance. Microbial contamination can be controlled by choosing the egg source wisely and by storing eggs carefully. A lot of ...
  • Mahmoud, Hala Bassam (Notre Dame University-Louaize, 2021)
    Antibiotic resistance and prevalence of hospital (HAI) and community-acquired (CAI) infections are significantly increasing in the world, though very few studies are addressing this topic in Lebanon. Therefore, this meta-analysis aims to identify antibiotic (AB) resistance prevalence among hospital and community acquired infections. Literature databases were searched for antibiotic resistance, HAI, and CAI in Lebanon from 2010 to 2020. To be eligible for inclusion, studies had to report data in Lebanon published between 2010 and 2020, antibiotic resistance in microorganisms responsible for either ...
  • Minassian, Georges B. (2021)
    Herein, we describe, a simple method for the synthesis of dendrigraft poly-L-lysine (d-PLL) coated gold nanoparticles in water (AuNPs-d-PLL) as potential vehicles of siRNA delivery to prostate cancer cells, PC3-PSMA. AuNPs-d-PLL with diameters ranging between 50 ̶ 130 nm have been synthesized in aqueous solutions using d-PLL (7 KD) as a capping ligand and L-ascorbic acid as a reducing agent. The size of the resulting AuNPs was found to depend on several parameters, such as the concentrations of gold salt, reducing agent, and d-PLL. The obtained AuNPs-d-PLL were characterized using UV-visible ...
  • Sfeir, Mikel (Notre Dame University-Louaize, 2021)
    “In the truth there is no news and in the news there is no truth”, a soviet-era political joke, still applies to the present times. This study will highlight all the communication forms and how they are used nowadays as a tool for propaganda especially in the digital world. When website traffic, clicks, and reach are at stake, information disorder in the form of misleading/fake information would be used as a tool to enhance data metrics across the digital world. This study tackles information disorder during all its phases: creation, production, communication, and the user experience through ...
  • Hanna, Marianne G. (Notre Dame University-Louaize, 2021)
    Bitcoin is the most popular purely digital cryptocurrency nowadays. It started in 2009 as a peer to peer payment system, decentralized, pseudo-anonymous and secure system of money. The main objective of this study is to estimate and predict the weekly close bitcoin price by including other variables like commodities, indexes and demand / supply variables through different kind of machine learning and deep learning such as multiple regression, time series ARIMA model, artificial neural network, combination of multiple regression and ARIMA model, and finally combination of multiple regression, ...
  • Danageuzian, Hrair Razmig (Notre Dame University-Louaize, 2021)
    The term operational risk became widespread in the late 1990s when central bank representatives of twelve countries formed a working committee; the Basel Committee on Banking Supervision (BCBS). The BCBS defines operational risk as the risk of loss resulting from inadequate or failed internal processes, people and systems or from external events. This research aims to model operational risk data using the Loss Distribution Approach under BCBS requirements. Simulated data was used consisting of 3,192 operational loss events between the years 2009 and 2018. The implementation of the LDA was ...
  • Mahmoud, Faten (Notre Dame University-Louaize, 2021)
    Fuzzy measure theory is a generalization of classical measure theory. It was first introduced by Lotfi Zadeh in 1965 in his famous paper ”Fuzzy Sets”. After more than 50 years of the existence and development of classical measure theory, mathematicians felt that the additivity property is, in some applications, too restrictive. It is also unrealistic under real and physical conditions where measurement errors are unavoidable. According to Sugeno, fuzzy measures are obtained by replacing the additivity condition of classical measures with weaker conditions of monotonicity and continuity. Chapter ...

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