The natural sciences

This history of antimicrobials is marked with impressive discoveries, the majority of which have their origin in natural products. However in this work, the antimicrobial activity of β- nitrostyrenes and related compounds of synthetic origin is reviewed and investigated with a particular focus on the influence of fluorine functionality. Various fluorinated β-methyl-β-nitrostyrene compounds were prepared, their minimum inhibition concentration in cultures of Gram positive, Gram negative and a fungus and their lipophilicity was determined.

133p runthenight05 01-03-2023 6 3   Download

The main aims of physical geodesy are to study the shape of the Earth, its gravity field and the geoid which is an equipotential surface closest to the mean sea level. Precise geoid determination has been an important research topic in geodesy and geophysics in the past two decades. Scientists and government agencies all around the world have made great efforts on the development of highaccuracy geoid models.

182p runthenight07 01-03-2023 8 3   Download

The focus of this thesis was to study the chemotaxonomic relationship of selected southern Australian marine brown algae of the genera Cystophora and Sargassum. Consequently, this resulted in the isolation and structure elucidation of six new terpenoids from two southern Australian marine brown algae Cystophora moniliformis and Sargassum fallax together with 10 previously reported natural products. As a result of the re-isolation of these known secondary metabolites, updated and complete structural characterisation data could be provided for the first time for 7 of these compounds.

132p runthenight07 01-03-2023 8 3   Download

This study proceeded to address the following objectives: To evaluate the effect of gas composition commonly used in modified atmosphere packaging (80% O2 and 20% CO2) on the shelf life of beef patties; to formulate an optimal solution containing natural antioxidant and antimicrobial preservatives and to study the effect of this combination and MAP on physiochemical attributes (surface colour (chroma, hue angle), metmyoglobin and oxmyoglobin contents, lipid stability) of fresh beef patties; to evaluate the effect of combined antioxidant – antimicrobial natural preservative and MAP on packag...

95p runthenight04 02-02-2023 9 2   Download

The main aims of physical geodesy are to study the shape of the Earth, its gravity field and the geoid which is an equipotential surface closest to the mean sea level. Precise geoid determination has been an important research topic in geodesy and geophysics in the past two decades. Scientists and government agencies all around the world have made great efforts on the development of high-accuracy geoid models.

182p runthenight04 02-02-2023 11 3   Download

This research examines how parametric loudspeakers may be considered unique acousmatic musical instruments; how the parametric acoustic array (PAA) can potentially make new forms of music and listening experiences; and how PAA-design problems can be overcome. Interdisciplinary in nature, the study uses grounded theory and experimental music practice within a design research methodology. Theory emerges from data, in concert with analysis and framing that draws on areas such as electroacoustic music, spatial composition, acoustics, PAA science/theory, modulation theory, and medium theory.

177p runthenight04 02-02-2023 3 3   Download

Objectives: Researching and analyzing the structure of Vietnamese general textbooks and textbooks of some other countries that have advanced education to build model of textbooks of Natural Science subject at the secondary school with specific criteria, contributing to renovation of teaching methods, implementation of educational reform to develop competencies and personalities of students, enhancement of Natural Science education quality.

27p tunelove 10-06-2021 34 5   Download

Research purposes: The thesis was to develop intensive and systematic painting of the patriotic movement against the Frenchin Cochinchine period 1885-1918. On the basis, of an overview, the science nature and characteristics, the impacts of the movementfor the development of Cochinchine history in the early twentieth century.

27p thebadguys 08-06-2021 15 4   Download

Research purposes: Research to propose the structure of physics teaching competency (PTC), some measures for development and assessment of the levels of PTC of PPSs while teaching the PPM.

27p thebadguys 08-06-2021 32 5   Download

Aim of the thesis: Development of a new method for determining concentration of the radionuclides in enviromental samples by mean of gamma spectroscopy. Establishing a data set of the soil-plant transfer factor (TF) of radionuclides 238U, 232Th and 40K for some vegetables in Truong Sa island and that of 238U, 232Th, 40K and 137Cs for tea tree from Luong My farm, Hoa Binh province, Vietnam and evaluate the influence of natural radionuclide concentration to the soil-plant transfer process of artificial radionuclide 137Cs.

30p extraenglish 24-05-2021 25 3   Download

The objectives of the thesis is: Determination of the concentration of the Naturally Occurring Radioactive Materials (NORM) in some building materials commonly used in Lao PDR such as cement, sand, etc. by gamma spectrometers using NaI(Tl) and HPGe detectors.

27p larachdumlanat129 20-01-2021 50 3   Download

Summary of doctoral dissertation on education: Life skills education for ethnic minority elementary school pupils in Northern mountainous regions of Viet Nam purpose the project is to suggest solutions in the life skills education for ethnic minority elementary pupils in Northern mountainous regions through teaching Nature and Society, and Science subjects to stimulate the pupils in initiative learning, improvement of life skills and education quality of life skills through these subjects.

27p nganhanggddt2014 01-07-2014 104 9   Download

ProLiV - Animated Process-modeler of Complex (Computational) Linguistic Methods and Theories - is a fully modular, flexible, XML-based stand-alone Java application, used for computer-assisted learning in Natural Language Processing (NLP) or Computational Linguistics (CL).

4p hongphan_1 15-04-2013 60 4   Download

This is a paper supporting the demonstration of the LX-Center at ACL-IJCNLP-09. LX-Center is a web center of online linguistic services aimed at both demonstrating a range of language technology tools and at fostering the education, research and development in natural language science and technology.

4p hongphan_1 15-04-2013 60 3   Download

Control of transferrin expression by b-amyloid through the CP2 transcription factor Sang-Min Jang1,*, Jung-Woong Kim1,*, Chul-Hong Kim1, Joo-Hee An1, Eun-Jin Kang1, Chul Geun Kim2, Hyun-Jung Kim3 and Kyung-Hee Choi1 1 Department of Life Science (BK21 Program), College of Natural Sciences, Chung-Ang University, Seoul, Korea 2 Department of Life Science and Research Institute for Natural Sciences, Hanyang University, Seoul, Korea 3 College of Pharmacy, Chung-Ang University, Seoul, Korea Keywords Alzheimer’s disease; CP2; iron homeostasis; oxidative stress; transferrin Correspondence K.-H.

12p viettel02 19-02-2013 32 3   Download

Philip Kindred Dick (December 16, 1928 – March 2, 1982) was an American science fiction novelist, short story writer, and essayist. Dick explored sociological, political and metaphysical themes in novels dominated by monopolistic corporations, authoritarian governments, and altered states. In his later works, Dick's thematic focus strongly reflected his personal interest in mysticism and theology. He often drew upon his own life experiences and addressed the nature of drug use, paranoia and schizophrenia, and mystical experiences in novels such as A Scanner Darkly and VALIS.

13p hotmoingay7 23-01-2013 54 3   Download

Philip Kindred Dick (December 16, 1928 – March 2, 1982) was an American science fiction novelist, short story writer, and essayist. Dick explored sociological, political and metaphysical themes in novels dominated by monopolistic corporations, authoritarian governments, and altered states. In his later works, Dick's thematic focus strongly reflected his personal interest in mysticism and theology. He often drew upon his own life experiences and addressed the nature of drug use, paranoia and schizophrenia, and mystical experiences in novels such as A Scanner Darkly and VALIS.

15p hotmoingay7 23-01-2013 127 5   Download

The aim of the study was to investigate the crystallization kinetics and solidification behaviour of Fe60Co8Mo5Zr10W2B15 bulk glass forming alloy. The solidification behaviour in near-equilibrium and non-equilibrium cooling conditions was studied. The eutectic and peritectic reactions were found to exist in the solidification sequence of the alloy. The bulk metallic glass formation was achieved by using two methods: quenching from the liquid state and quenching from the semi-state.

140p dontetvui 21-01-2013 82 12   Download

Suppose that G is a locally compact abelian group, and write M(G) for the algebra of bounded, regular, complex-valued measures under convolution. A measure µ ∈ M(G) is said to be idempotent if µ ∗ µ = µ, or alternatively if µ takes only the values 0 and 1. The Cohen-Helson-Rudin idempotent theorem states that a measure µ is idempotent if and only if the set {γ ∈ G : µ(γ) = 1} belongs to the coset ring of G, 1. Introduction Let

31p dontetvui 17-01-2013 73 8   Download

We construct an exhaustive submeasure that is not equivalent to a measure. This solves problems of J. von Neumann (1937) and D. Maharam (1947). Contents 1. Introduction 2. Roberts 3. Farah 4. The construction 5. The main estimate 6. Exhaustivity 7. Proof of Theorems 1.2 to 1.4 References 1. Introduction Consider a Boolean algebra B of sets.

30p dontetvui 17-01-2013 75 11   Download