Results 11 to 20 of about 319,249 (310)

Development and Nature of Preservice Chemistry Teachers’ Pedagogical Content Knowledge for Nature of Science

open access: yesResearch in Science Education, 2015
The purpose of this case study is to delve into the complexities of the early development of preservice chemistry teachers’ science teaching orientations, knowledge of learners, knowledge of instructional strategies, and knowledge of assessment during a two-semester intervention designed to enhance their pedagogical content knowledge (PCK) for teaching
Demirdogen, Betul   +3 more
openaire   +4 more sources

Pharmaceutical pollution disrupts the behavior and predator-prey interactions of two widespread aquatic insects

open access: yesiScience, 2022
Summary: Pharmaceutical pollution represents a rapidly growing threat to ecosystems worldwide. Drugs are now commonly detected in the tissues of wildlife and have the potential to alter the natural expression of behavior, though relatively little is ...
Aneesh P.H. Bose   +12 more
doaj   +1 more source

Changes in Nature of Science Understandings of Preservice Chemistry Teachers in an Explicit, Reflective, and Contextual Nature of Science Teaching [PDF]

open access: yesInternational Journal of Research in Education and Science, 2020
This study aimed to investigate changes in the understandings of the Nature of Science (NOS) of preservice chemistry teachers after participating in the explicit, reflective, and contextual NOS teaching. The sample of the study consisted of nine preservice chemistry teachers who attended scientific research methods course at the undergraduate level ...
openaire   +2 more sources

PELATIHAN PEMBUATAN REAGEN KIMIA UNTUK PRAKTIKUM IPA SMP DAN IMPLEMENTASINYA DALAM KEGIATAN PEMBELAJARAN BAGI GURU IPA, LABORAN DAN SISWA SMP

open access: yesE-Dimas, 2011
Based on the survey, SMP Negeri 4 Semarang had many parrarel classes that it had?é?á 3 hours/week for science subject. To support it, this school was equipped by having a natural sciences labolatory.
Eny Hartadiyati   +3 more
doaj   +1 more source

Natural Products Chemistry: Advances in Synthetic, Analytical and Bioactivity Studies

open access: yesMolecules, 2023
The chemistry of natural compounds inspired and still guides several branches of modern chemical sciences [...]
Giovanni Ribaudo
doaj   +1 more source

Natural products chemistry: The emerging trends and prospective goals

open access: yesSaudi Pharmaceutical Journal, 2018
The role and contributions of natural products chemistry in advancements of the physical and biological sciences, its interdisciplinary domains, and emerging of new avenues by providing novel applications, constructive inputs, thrust, comprehensive ...
Riaz A. Khan
doaj   +1 more source

« Décomposition fécondante » : la chimie organique et les savoirs du vivant chez Flaubert

open access: yesFlaubert: Revue Critique et Génétique, 2015
In the 19th century we see the emergence of new ways of conceiving man and living organisms. Flaubert, who does not escape this tendency, involves a wide assortment of natural sciences in his writings, which belongs to a realistic approach, whereas ...
Judith Wulf
doaj   +1 more source

Natural product anticipation via chemical synthesis: Discovery of two new securinega alkaloids

open access: yesiScience
Summary: The isolation of a natural product conventionally precedes its chemical synthesis. Often, the isolation and structure determination of a natural product present in minute quantities in its natural source pose formidable challenges, akin to ...
Minji Kim   +6 more
doaj   +1 more source

Selective recognition and extraction of iodide from pure water by a tripodal selenoimidazol(ium)-based chalcogen bonding receptor

open access: yesiScience
Summary: A selenium-based tripodal chalcogen bond (ChB) donor TPI-3Se is demonstrated for the recognition and extraction of I− from 100% water medium. NMR and ITC studies with the halides reveal that the ChB donor selectively binds with the large, weakly
Abu S.M. Islam   +4 more
doaj   +1 more source

The first specific probe for pyrrolidine with multifunction by the interaction mechanism of atomic economic reaction

open access: yesiScience
Summary: Pyrrolidine (PyD) has an important impact on the environment and human health. However, there is currently no method for trace detection of PyD. Here, we successfully designed diaminomethylene-4H-pyran (1) as the first specific fluorescent probe
Xi-Ying Cao   +9 more
doaj   +1 more source

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