Natural science

This study will assess the effectiveness of using AR tools to design virtual experiments combined with methods and tools to deploy virtual chemistry experiments in teaching the topic of "Acid - Base - pH - Oxide - Salt" in Grade 8 Natural Science to enhance student learning outcomes and interest in Natural Science education.

10p viaburame 14-03-2025 1 1   Download

The study also reveals that teachers need to use more role-based activities in which students should experience the role of employees. The role-based approach should be emphasised more in integrating career orientation in teaching science and STEM educational activities to achieve career-oriented competence for students.

10p viaburame 14-03-2025 3 1   Download

In Vietnam, a tea-producing country, the tea buds and top three leaves are normally used for tea production while older leaves are pruned and discarded as agricultural waste in the winter. The present study aimed to exploit catechins from pruned tea leaves and use them as natural antioxidants for applications in the food industry.

12p vibecca 01-10-2024 4 2   Download

Iceberg lettuce is one of the most important vegetables economically and nutritionally, but its perishable nature poses challenges for storage and long-distance transportation. This study investigated the effect of maturity stages on the quality of iceberg lettuce for export under cold storage conditions.

12p vibecca 01-10-2024 2 2   Download

Thus teaching Science based on students' VARK learning styles plays an important role in enhancing the quality of teaching and learning, helping students develop comprehensively. Therefore, within the framework of this paper, the research focuses on proposing a teaching process based on the learning styles of primary school students in teaching Science, intending to contribute to the development of competencies, particularly natural science competencies.

10p tuetuebinhan000 23-01-2025 2 1   Download

Tổng hợp 170 bài mẫu Writing Task 2 theo chủ đề IELTS essay sample; education; the environment and natural source; science and technology; the media; advertisement and customer.

168p nguoiham 22-10-2020 156 26   Download

L'unité est disponible dans votre langue. De la plus petite unité, stabilité de la structure, ce qui signifie complet, utilisé pour composer des phrases. De son nom peut faire des choses (noms), seulement la participation active (passive), de l'humeur, de la nature (à partir) ... L'outil montre le concept de l'être humain à la réalité

33p nolgefal 25-04-2011 135 35   Download

Refers to a natural process converting atmospheric nitrogen to ammonium to yield usable nitrogen source. • Only a few prokaryotic species can "fix" nitrogen. • Nitrogenase complex dinitrogenase dinitrogenase reductase

114p zingzing09 21-10-2012 94 8   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.

26p hotmoingay7 23-01-2013 58 8   Download

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 9 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 10 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 10 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 16 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 6 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 40 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 18 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 33 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 28 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 52 3   Download