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Artigos de revistas sobre o tema "Chemist activity"

Autor: Grafiati

Publicado: 12 de outubro de 2024

Última modificação: 31 de julho de 2025

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1

Martin, Dean F., and Marwa Elkharsity. "Chemist at war: World War II roles of Jonas Kamlet, consulting chemist." Bulletin for the History of Chemistry 44, no. 2 (2019): 134–38. https://doi.org/10.70359/bhc2019v044p134.

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Howder, Collin R., Kyle D. Groen, and Thomas S. Kuntzleman. "JCEClassroom Activity #107. And the Oscar Goes to...A Chemist!" Journal of Chemical Education 87, no. 10 (2010): 1060–61. http://dx.doi.org/10.1021/ed900013z.

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Efimova, I. "Boris Belousov, Talented Scientific Chemist Dedication Page of Biography." Medical Radiology and radiation safety 66, no. 6 (2021): 116–18. http://dx.doi.org/10.12737/1024-6177-2021-66-6-116-118.

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The article contains material on scientific activity of the famous scientific chemist B. Belousov, the head of the laboratory of the Institute of Biophysics of the Ministry of health of the USSR, the creator of an effective anti-radiation drug, the author of the invention of the vibrational reaction Belousov-Jabotinsky.

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4

Chojecki, Mirosław. "NOW-a w karnawale." Wolność i Solidarność 10 (2017): 50–61. http://dx.doi.org/10.4467/25434942ws.17.003.13116.

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NOWa Publishing House during the "Solidarity carnival" period in 1980-1981 NOWA was an independent and underground publishing house founded by the democratic opposition in the 1970s. The following article is a presentation of Mirosław Chojecki memories. This chemist, employed at the Institute for Nuclear Research, was also a co-worker of the Workers' Defense Committee and one of the most active member of the NOWa publishing house. Article refers especially to the history of his activity during the “Solidarity carnival” period in 1980-1981.

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Chojecki, Mirosław. "NOW-a w karnawale." Wolność i Solidarność 10 (2017): 50–61. http://dx.doi.org/10.4467/25434942ws.17.003.13116.

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NOWa Publishing House during the "Solidarity carnival" period in 1980-1981 NOWA was an independent and underground publishing house founded by the democratic opposition in the 1970s. The following article is a presentation of Mirosław Chojecki memories. This chemist, employed at the Institute for Nuclear Research, was also a co-worker of the Workers' Defense Committee and one of the most active member of the NOWa publishing house. Article refers especially to the history of his activity during the “Solidarity carnival” period in 1980-1981.

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Kilah, Nathan L., and Eric Meggers. "Sixty Years Young: The Diverse Biological Activities of Metal Polypyridyl Complexes Pioneered by Francis P. Dwyer." Australian Journal of Chemistry 65, no. 9 (2012): 1325. http://dx.doi.org/10.1071/ch12275.

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Sixty years ago, the Australian chemist Francis P. Dwyer pioneered the use of ruthenium polypyridyl complexes as biologically active compounds. These chemically inert and configurationally stable complexes revealed an astonishing range of interesting biological activities, such as the inhibition of the enzyme acetylcholinesterase, anti-cancer activity in vivo, and bacteriostatic/bacteriocidal action. This review commemorates the sixtieth anniversary of Dwyer and co-workers’ landmark 1952 publication, summarises their broader achievements in biological inorganic chemistry, and discusses the con

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Litterman, Nadia, Christopher Lipinski, and Sean Ekins. "Small molecules with antiviral activity against the Ebola virus." F1000Research 4 (February 9, 2015): 38. http://dx.doi.org/10.12688/f1000research.6120.1.

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The recent outbreak of the Ebola virus in West Africa has highlighted the clear shortage of broad-spectrum antiviral drugs for emerging viruses. There are numerous FDA approved drugs and other small molecules described in the literature that could be further evaluated for their potential as antiviral compounds. These molecules are in addition to the few new antivirals that have been tested in Ebola patients but were not originally developed against the Ebola virus, and may play an important role as we await an effective vaccine. The balance between using FDA approved drugs versus novel antivir

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8

Ramesh, Muthusamy, and Arunachalam Muthuraman. "Quantitative Structure-Activity Relationship (QSAR) Studies for the Inhibition of MAOs." Combinatorial Chemistry & High Throughput Screening 23, no. 9 (2020): 887–97. http://dx.doi.org/10.2174/1386207323666200324173231.

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Monoamine oxidases are the crucial drug targets for the treatment of neurodegenerative disorders like depression, Parkinson’s disease, and Alzheimer’s disease. The enzymes catalyze the oxidative deamination of several monoamine containing neurotransmitters, i.e. serotonin (5-HT), melatonin, epinephrine, norepinephrine, phenylethylamine, benzylamine, dopamine, tyramine, etc. The oxidative reaction of monoamine oxidases results in the production of hydrogen peroxide that leads to the neurodegeneration process. Therefore, the inhibition of monoamine oxidases has shown a profound effect against ne

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Rana, Meenakshi, Niladry Sekhar Ghosh, Dharmendra Kumar, Ranjit Singh, and Jyoti Monga. "2D-QSAR Assisted Design, and Molecular Docking of Novel Indole Derivates as Anti-Cancer Agents." Oriental Journal Of Chemistry 40, no. 5 (2024): 1440–48. http://dx.doi.org/10.13005/ojc/400527.

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CADD is an important aspect of the any currently employed drug discovery process for a medicinal chemist. In the current study, research was initiated with a two dimensional Quantitative Structural Activity Relationship (QSAR) model generation through previously synthesized compounds. The 2-D QSAR model generated is then engaged for the predicting of the activity of our proposed compounds to be synthesized. This ligand-based approach of computer aided drug designing (CADD) is complimented further with the molecular docking simulations. Molecular docking of our proposed compounds was done to st

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10

Dearden, John C. "The History and Development of Quantitative Structure-Activity Relationships (QSARs)." International Journal of Quantitative Structure-Property Relationships 2, no. 2 (2017): 36–46. http://dx.doi.org/10.4018/ijqspr.2017070104.

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Following the publication of the history and development of QSAR, it became apparent that a number of matters had not been covered. This addendum is an attempt to rectify that. A very early approach (ca. 60 B.C.) by Lucretius shows that he understood how molecular size and complexity affect liquid viscosity. Comments by Kant (1724-1804) emphasized the necessity of mathematics in science. A claim that the work of von Bibra and Harless in 1847 pre-dated that of Overton and H.H. Meyer is shown not to be correct. K.H. Meyer and Gottlieb-Billroth published in 1920 what is probably the first QSAR eq

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Hodgson, Geoffrey M., and Michael Polanyi. "Editorial introduction to ‘Collectivist planning’ by Michael Polanyi (1940)." Journal of Institutional Economics 15, no. 6 (2019): 1055–74. http://dx.doi.org/10.1017/s1744137419000377.

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AbstractAfter an esteemed academic career as a chemist, Michael Polanyi switched to the social sciences and made significant contributions to our understanding of the nature and role of knowledge in society. Polanyi's argument concerning knowledge led him to emphasise the vital importance of decentralised mechanisms of adjustment and coordination, including markets. His article ‘Collectivist Planning’ (1940) enters into debates about the possibility (or otherwise) of centrally planning scientific and economic activity. This early article also foreshadows post-war debates within the Mont Pèleri

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M.K.M, ABDUL LATHIFF, SURESH R, and SENTHAMARAI R. "A REVIEW ON ANTICANCER ACTIVITIES OF NOVEL DIHYDRO PYRIMIDINONES / THIONES DERIVATIVES." YMER Digital 21, no. 03 (2022): 460–72. http://dx.doi.org/10.37896/ymer21.03/47.

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Dihydropyrimidinones and thiones are a significant class of organic as well as heterocyclic compounds synthesized by cyclo condensation reaction, called Biginelli reaction that was reported for the first time by Italian chemist Pietro Biginelli in 1893. The synthesis of dihydropyrimidinones and thiones involve one pot multicomponent reaction (MCR) of various aldehydes, β- ketoester and urea or thiourea. Now, the dihydropyrimidinones and thiones have emerged as one of the most advantaged medicinal pharmacophores as they appear as an important structural part in many naturally occurring and synt

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Sharma, Praveen K., Andleeb Amin, and M. Kumar. "A Review: Medicinally Important Nitrogen Sulphur Containing Heterocycles." Open Medicinal Chemistry Journal 14, no. 1 (2020): 49–64. http://dx.doi.org/10.2174/1874104502014010049.

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Nitrogen sulphur containing heterocycles have specific properties due to which they can be used as a potential material in a different type of industries such as medicinal/pharmaceutical, paint, packing and textile, required for various chemical, physical operations and their use as products. Especially dyes, paint, agrochemicals, medicine, etc. make them more significant. In present days, Nitrogen-Sulfur heterocycles are repeatedly attracting the interest of chemists due to their exceptional bioactive behavior. The present study is a review of the work carried out by a chemist in the discover

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Juan, NúñezValdés. "Gabriella Morreale, The Italian-Spanish Chemist who Introduced the Heel Prick Test in Newborns." INTERNATIONAL JOURNAL OF MULTIDISCIPLINARY RESEARCH AND ANALYSIS 05, no. 08 (2022): 1930–37. https://doi.org/10.5281/zenodo.6956115.

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This article shows the biography of a woman, Gabriella Morreale, born in Italy but nationalized Spanish for having lived since she was eleven years old and having developed her brilliant work in that country, to whom many merits are owed because of the important discoveries that she did in her professional activity as a graduate and doctorate in Chemistry. Among its milestones are the introduction of the heel prick test, a clinical test for the early detection of congenital metabolic diseases, and her studies on iodine deficiency, especially serious among the youngest, because it can cause bra

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Md, Akram* Abdul Sayeed Mohd Waseem Akram MD Ather Ali Soherwardi. "STUDIES ON THE SYNTHESIS OF SOME NEW 1,2,4- TRIAZOLES DERIVATIVES AND EVALUATION FOR THEIR ANTI-FUNGAL ACTIVITY PROFILES." Indo American Journal of Pharmaceutical Sciences 04, no. 08 (2017): 2234–48. https://doi.org/10.5281/zenodo.839545.

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The synthesis of new heterocyclic compounds has always drawn the attention of medicinal chemist over the years mainly because they possess diverse biological properties. The literature survey on 1,2,4-triazoles revealed that they are endowed with wide variety of biological activities .During the present investigation a series of new 1,2,4-triazole derivatives N-(3-(2-(3- hydrazinyl-3-oxoalkanoyl)hydrazinyl)-5-(phenoxymethyl)-4H-1,2,4-triazol-4-yl)isonicotinamide(6a- 6e)were synthesized by reacting withN-(5-mercapto-3-(phenoxymethyl)-4H-1,2,4-triazol-4- yl)isonicotinamide (5) and aliphatic dica

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Moeed, Swehra. "Activity-based Learning and Development of High Mental Abilities an Intention of Intermediate Level Chemistry Syllabus." International Journal of Emerging Issues in Early Childhood Education 1, no. 2 (2020): 115–26. http://dx.doi.org/10.31098/ijeiece.v1i2.55.

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Course content is a hub of educational activities. The method of teaching and assessment proceduremore or less rely on the nature of syllabus. Being core of educational activities great importance isgiven to course content. This study was conducted to investigate the opinion of teachers concerningexisting syllabus of intermediate level chemistry subject. The data was gathered throughquestionnaire based on 5 point Likert scale items. Sixty three teachers of chemist ry subject wereworking at Government Degree Colleges (GDCs) and Government Higher Secondary Schools(GHSSs) of district Peshawar. Am

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Sunil, S. Choudhare Gopinath S. Khansole and Vijay N. Bhosale*. "SYNTHESIS OF PHENYL 1H-INDAZOLO [1,2-b] PHTHALAZINE TRIONE DERIVATIVES WITH THEIR BIOLOGICAL EVALUATION." Indo American Journal of Pharmaceutical Sciences 04, no. 12 (2017): 4272–79. https://doi.org/10.5281/zenodo.1095543.

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Heterocyclic compounds are the most global moieties in chemical compounds which exhibit wide spectrum of pharmacological activities. Multicomponent reactions are important tool in the hands of organic chemist’s,researcher. Since they offer improved atom economy for construction of complex molecules over the stepwise liner convergent synthesis. A simple, efficient and green protocol has been developed for the synthesis phenyl 1H-Indazolo [1,2-b] Phthalazine trione derivatives from a one pot four componant condensation of Phthalic anhydride, Hydrazine hydrate, Dimedone and different substi

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Stepanov, Nano. "Louis Pasteur (1822 – 1895) – The Chemist, on the Occasion of the 200-th Anniversary of His Birth." Natural Science and Advanced Technology Education 31, no. 3 (2022): 293–317. http://dx.doi.org/10.53656/nat2022-3.07.

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The article is dedicated to the 200-year anniversary of the great Louis Pasteur and aims to represent his work focusing on his less famous contributions as a chemist. By examining his accomplishments in the historical context of chemistry’s development – isomerism (between Berzelius and Van’t Hoff) and theory of fermentation (between Liebig and Berthelot). Based on his research on optically active substances (mainly tartaric acid and its salts) he distinguishes optical activity caused by crystal structure and molecular asymmetry, hypothesizes that the way atoms are positioned in a molecule is

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19

Ergene, Cansu, and Edmund F. Palermo. "Antimicrobial Synthetic Polymers: An Update on Structure-Activity Relationships." Current Pharmaceutical Design 24, no. 8 (2018): 855–65. http://dx.doi.org/10.2174/1381612824666180213140732.

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The rising incidence of antibiotic-resistant infections, combined with a declining number of new antibiotic drug approvals, has generated an alarming therapeutic gap that critically undermines public health. Host Defense Peptides (HDPs), sometimes referred to as “Nature’s Antibiotics”, are short chain, amphiphilic and cationic peptide sequences found in all multicellular organisms as part of their innate immunity. While there is a vast diversity in terms of HDP sequence and secondary structure, they all seem to share physiochemical characteristics that can be appropriated for macromolecular de

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Campbell, Duncan J., Juerg Nussberger, Michael Stowasser, et al. "Activity Assays and Immunoassays for Plasma Renin and Prorenin: Information Provided and Precautions Necessary for Accurate Measurement." Clinical Chemistry 55, no. 5 (2009): 867–77. http://dx.doi.org/10.1373/clinchem.2008.118000.

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AbstractBackground: Measurement of plasma renin is important for the clinical assessment of hypertensive patients. The most common methods for measuring plasma renin are the plasma renin activity (PRA) assay and the renin immunoassay. The clinical application of renin inhibitor therapy has thrown into focus the differences in information provided by activity assays and immunoassays for renin and prorenin measurement and has drawn attention to the need for precautions to ensure their accurate measurement.Content: Renin activity assays and immunoassays provide related but different information.

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Safronova, Alevtina. "The Activity of the English Doctor of Medicine Jacob Grieve in Russia in the First Half of the 18th Century." Quaestio Rossica 13, no. 2 (2025): 707–22. https://doi.org/10.15826/qr.2025.2.989.

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The author of this study attempts to reconstruct the activities of the English Doctor of Medicine Jacob Grieve in the mining Urals during the initial period of his career in Russia in 1734–1737. The article covers the story of his recruitment by V. N. Tatishchev, head of the factories of the Urals and Siberia, in Moscow on the recommendation of Nicolaas Bidloo (1670–1735), head of the first hospital in Moscow and the school that operated under it. The article highlights the peculiarity of Grieve’s duties as a medicus and simultaneously a chemist at the factories, as specified in the contract a

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Shul'pin, Georgiy B. "C–H functionalization: thoroughly tuning ligands at a metal ion, a chemist can greatly enhance catalyst's activity and selectivity." Dalton Transactions 42, no. 36 (2013): 12794. http://dx.doi.org/10.1039/c3dt51004b.

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Debue-Barazer, Christine. "Les implications scientifiques et industrielles du succès de la Stovaïne®. Ernest Fourneau (1872–1949) et la chimie des médicaments en France." Gesnerus 64, no. 1-2 (2007): 24–53. http://dx.doi.org/10.1163/22977953-0640102002.

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The synthetic local anaesthetic Stovaïne® was commercialised in France in 1904. Its inventor, Ernest Fourneau, began his career as a pharmaceutical chemist in organic chemistry laboratories in Germany, where from 1899 to 1901 he discovered how basic research could benefit from the modern chemistry theories which had developed in Germany starting in the 1860s. Using the complex structure of cocaine, he invented an original molecule, with comparable activity, but less toxic. The knowledge and the know-how which he acquired in Germany nourished his reflection in the field of the chemistry of the

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Caliński, Tadeusz. "Rozwój i osiągnięcia w biometrii polskiej." Przegląd Statystyczny. Statistical Review 2012, SI1 (2012): 47–52. http://dx.doi.org/10.59139/ps.2012.si1.2.

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Biometry is a branch of science which deals with applications of mathematical and statistical methods to biological problems, particularly to the design and analysis of experiments. Two prominent scientists are considered as pioneers of biometry in Poland. An anthropologist, Jan Czekanowski (1882-1965), and a chemist, agricultural researcher and plant breeder, Edmund Załęski (1863-1932). One of Załęski’s followers was Stefan Barbacki, a scientist of great achievements in the development of agricultural research methodology and biometry. His activity contributed essentially to the formation of

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Nandal, Rimmy, Aakash Deep, Ishwar Singh, et al. "Synthesis of Metal Complexes of Primaquine and In-vitro Antimalarial Evaluation Against Plasmodium falciparum." Current Bioactive Compounds 15, no. 6 (2020): 631–36. http://dx.doi.org/10.2174/1573407214666180720124844.

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Background: Resistance to malarial drugs represents a major obstacle in the treatment of disease, thereby increasing the need for more efficient drugs. The development of metal complexes offers the medicinal chemist an opportunity to expand the activity of drugs. For providing supportive therapy to the host to boost its immune system several new antimalarial drugs are being beneath research, but sufficient information on their efficacy is yet not available. Methods: In view of above, eight drug metal complexes (Ba (II), Ca (II), Zn (II), St (II), Hg (II), Fe (III), Cu (II), Ni (II) of Sulfamet

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Aminova, E. K., D. N. Bilalova, N. A. Kireeva, and M. A. Malikova. "STUDY OF THE DISCIPLINE "ANALYTICAL CHEMISTRY" IN ENGLISH AT A TECHNICAL UNIVERSITY." Bulletin USPTU Science education economy Series economy 4, no. 34 (2020): 119–23. http://dx.doi.org/10.17122/2541-8904-2020-4-34-119-123.

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One of the most priority directions of development of the state University is its international activities. Paying great attention to the English language, technical University teachers achieve the following goals: to consolidate and develop business relations to improve the higher education system in the current conditions; to increase the authority of the University as a center of educational, scientific and research activities; to develop international cooperation of the University. Chemistry occupies one of the main places among the subjects studied at school. Chemistry is an interesting a

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SIMÕES, ANA. "Textbooks, popular lectures and sermons: the quantum chemist Charles Alfred Coulson and the crafting of science." British Journal for the History of Science 37, no. 3 (2004): 299–342. http://dx.doi.org/10.1017/s0007087404005424.

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In this paper I address C. A. Coulson's teaching activities, writing textbooks and delivering popular science lectures, as well as his popular lectures on religion and the ‘scientific’ sermons delivered in his capacity as a lay preacher of the Methodist Church. I will pay particular attention to his thoughts on science. His commitment to forging a way to reconcile science and religion was built upon a reflection on the aims and methods of science within the broader framework of science's role in post-Second World War society. By noting that Coulson valued chemistry, mathematics and science in

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Sajida. Munadi. Th.AL-Suraify and Mohammed Abdul-Mounther Othman. "Synthesis and study of spectrally diagnosed heterocyclic compound." International Journal of Research in Pharmaceutical Sciences 11, SPL4 (2020): 2613–22. http://dx.doi.org/10.26452/ijrps.v11ispl4.4527.

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In general terms, medicinal chemistry manages the revelation & plan of recent remedial synthetic concoctions & its uses as meds. Throughout the most recent couple of decades, mixes bearing heterocyclic cores have gotten considerably more consideration of the scientific expert, because of their expansive chemo remedial exercises, for example, calming, anthelmintic, hostile to tubercular, against parasitic & hostile to microbial exercises. Furthermore, Heterocycles & medicines are both interred related, the human is totally dependent on drugs & most of the drugs are derived f

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Lim, Dong-Jin. "Methylene Blue-Based Nano and Microparticles: Fabrication and Applications in Photodynamic Therapy." Polymers 13, no. 22 (2021): 3955. http://dx.doi.org/10.3390/polym13223955.

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Methylene blue (MB) has been used in the textile industry since it was first extracted by the German chemist Heinrich Caro. Its pharmacological properties have also been applied toward the treatment of certain diseases such as methemoglobinemia, ifosfamide-induced encephalopathy, and thyroid conditions requiring surgery. Recently, the utilization of MB as a safe photosensitizer in photodynamic therapy (PDT) has received attention. Recent findings demonstrate that photoactivated MB exhibits not only anticancer activity but also antibacterial activity both in vitro and in vivo. However, due to t

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Lis, Manuel J., Bianca Bastos Caruzi, Guilherme Andreoli Gil, et al. "In-Situ Direct Synthesis of HKUST-1 in Wool Fabric for the Improvement of Antibacterial Properties." Polymers 11, no. 4 (2019): 713. http://dx.doi.org/10.3390/polym11040713.

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The use of Metal-Organic Frameworks (MOF) such as HKUST-1 in textiles is an alternative with regard to the development of technologies that are increasingly seeking for functionalities, mainly in the fields of health and hygiene, named biofunctional fabrics. However, the application of the MOF under the surface of the wool fiber can lead to a low durability finish due to its low fixation. Thus, this project aims to perform the direct synthesis of HKUST in the wool fiber, so that a product with good washing durability can be obtained. The purpose of this study was to incorporate metal-organic f

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Rathore, Swati, Shweta Mishra, Debarshi K. Mahapatra, Shailendra Patil, and Asmita G. Patil. "Thoughtful Insights into the Therapeutic Armamentarium of Chalcones: 10 Years of Glorious Journey." Current Bioactive Compounds 16, no. 6 (2020): 747–808. http://dx.doi.org/10.2174/1573407215666190411150734.

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Background: Naturally occurring chalcones afford diverse pharmacological activities such as anticancer, anti-malarial, anti-inflammatory, anti-tubercular, anti-hypertensive, anti-arrhythmic, antidiabetic, anti-angiogenic, anti-obesity, antiplatelet, anti-oxidant, hypolipidemic and anti-gout. They are frequently being used by the various researchers to design and develop new synthetic chalcones and many novel hybrid analogs as bioactive drugs. Many of these drugs are hybrid molecules, which are designed through molecular hybridization theory, and have displayed multiple pharmacological and medi

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Shul'pin, Georgiy B. "ChemInform Abstract: C-H Functionalization: Thoroughly Tuning Ligands at a Metal Ion, a Chemist Can Greatly Enhance Catalyst′s Activity and Selectivity." ChemInform 44, no. 47 (2013): no. http://dx.doi.org/10.1002/chin.201347223.

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Chalid, Sri Yadial, Pratiwi Nur Kinasih, Fitriah Hatiningsih, and Tarso Rudiana. "Antioxidant Activities and Profile of Amino Acid of Yoghurt from Beef Milk Fermentation with Dadih Starter." Jurnal Kimia Valensi 7, no. 1 (2021): 58–68. http://dx.doi.org/10.15408/jkv.v7i1.20425.

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Dadih is naturally fermented buffalo milk in bamboo tubes and known to have antioxidant, antibacterial, and antihypertensive activity. Lactic acid bacteria in dadih can use as a starter to produce yogurt. The study aimed to produce yogurt of cow's milk with dadih as a starter, to determine the antioxidant activity and amino acid composition. Dadih is added with concentration variation of 2.5; 5; 7.5 and 10% (v/v) and it fermented for 48 hours at room temperature. Lactic acid bacteria cell counts of dadih were calculated by the total plate count method. Yogurt was tested by organoleptics with 3

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Chalid, Sri Yadial, Pratiwi Nur Kinasih, Fitriah Hatiningsih, and Tarso Rudiana. "Antioxidant Activities and Profile of Amino Acid of Yoghurt from Beef Milk Fermentation with Dadih Starter." Jurnal Kimia Valensi 1, no. 1 (2021): 58–68. http://dx.doi.org/10.15408/jkv.v1i1.20425.

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Dadih is naturally fermented buffalo milk in bamboo tubes and known to have antioxidant, antibacterial, and antihypertensive activity. Lactic acid bacteria in dadih can use as a starter to produce yogurt. The study aimed to produce yogurt of cow's milk with dadih as a starter, to determine the antioxidant activity and amino acid composition. Dadih is added with concentration variation of 2.5; 5; 7.5 and 10% (v/v) and it fermented for 48 hours at room temperature. Lactic acid bacteria cell counts of dadih were calculated by the total plate count method. Yogurt was tested by organoleptics with 3

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Medici, Serenella, Massimiliano Peana, Alessio Pelucelli, and Maria Antonietta Zoroddu. "Rh(I) Complexes in Catalysis: A Five-Year Trend." Molecules 26, no. 9 (2021): 2553. http://dx.doi.org/10.3390/molecules26092553.

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Rhodium is one of the most used metals in catalysis both in laboratory reactions and industrial processes. Despite the extensive exploration on “classical” ligands carried out during the past decades in the field of rhodium-catalyzed reactions, such as phosphines, and other common types of ligands including N-heterocyclic carbenes, ferrocenes, cyclopentadienyl anion and pentamethylcyclopentadienyl derivatives, etc., there is still lively research activity on this topic, with considerable efforts being made toward the synthesis of new preformed rhodium catalysts that can be both efficient and s

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Thornber, Karen L. "Literature, Asia, and the Anthropocene: Possibilities for Asian Studies and the Environmental Humanities." Journal of Asian Studies 73, no. 4 (2014): 989–1000. http://dx.doi.org/10.1017/s0021911814001569.

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The term “Anthropocene,” coined in the 1980s by the ecologist Eugene F. Stoermer and popularized at the turn of the twenty-first century by the atmospheric chemist and Nobel laureate Paul Crutzen, has been used increasingly in the past decade to highlight human activity as a geological force and to underscore the rapidly escalating impacts of human behaviors on the planet—sufficient, many have argued, to launch a new geological age. While geologists and environmentalists continue to debate the validity of Anthropocene as a formal designation, climate change; mass extinctions of plant and anima

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Battistoni, Alyssa. "Anthropocene Politics." Perspectives on Politics 18, no. 3 (2020): 881–85. http://dx.doi.org/10.1017/s1537592720001887.

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AbstractThose for whom the term “Anthropocene” tends to evoke academic faddishness may be surprised to realize that the discourse about it is now two decades old. The term was first proposed in a 2000 paper by the atmospheric chemist Paul Crutzen and biologist Eugene Stoermer to describe the geological epoch in which human activity has come to shape the Earth itself. Since then, the concept has generated a vast amount of scholarly conversation and a wide range of interpretations, often concerning the start date of this new era: Did the “age of man” begin with the use of fire? The development o

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Poier, Dario, Sharon Mitchell, Victor Tulus, Gonzalo Guillén-Gosálbez, Javier Pérez-Ramírez, and Roger Marti. "Aiming for More Sustainable Cross-Coupling Chemistry by Employing Single-Atom Catalysis on Scale." CHIMIA 77, no. 3 (2023): 127. http://dx.doi.org/10.2533/chimia.2023.127.

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Scaling up syntheses from mg to kg quantities is a complex endeavor. Besides adapting laboratory protocols to industrial processes and equipment and thorough safety assessments, much attention is paid to the reduction of the process’ environmental impact. For processes including transition metal catalyzed steps, e.g. cross-coupling chemistry, this impact strongly depends on the identity of the metal used. As such, a key approach is the replacement of single-use with reusable heterogeneous catalysts. Transition metal single-atom heterogeneous catalysts (SAC), a novel class of catalytic material

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Gawrych, Roman. "Usefulness of the theory of the organizational cycle in managerial and professional work." PRAWO i WIĘŹ, no. 2 (May 24, 2024): 409–31. https://doi.org/10.36128/priw.vi49.913.

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The content of this article shows in a synthetic way the usefulness of the theory of the organized action cycle, the concept of which was developed by a French chemist and physicist,and at the same time the organizer of work processes in various units, Henry Louis Le Chatelier.The theory was presented as a useful philosophy of efficient operationin various areas of managerial work and social life.It was pointed out that it consists of three phases: the preparation phase (defining the objectives of the action, planning, acquiring resources) as well as the implementation andcontrol phases.The ar

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Al-Zubaidi, Ez al-Din Khazal Najm. "The catechins profile and antioxidant activity in different types of green tea bags." Journal of Misan Researches 16, no. 31 (2021): 279–98. http://dx.doi.org/10.52834/jmr.v16i31.32.

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Tea and mainly green tea as a rich source of antioxidants has been widely known for some time. The antioxidant capacity of tea including green tea is mainly due to its catechins content. The objective of this study was to determine the relationship between the ORAC value and the catechins content. Regular and decaffeinated commercial green tea bags commonly consumed in the United Kingdom (UK) have been examined using Reversed-Phase High-pressure Liquid Chromatography (RP-HPLC). Teabags were purchased from different local supermarkets in the UK and extracted with natural mineral water at temper

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Campora, Marta, Valeria Francesconi, Silvia Schenone, Bruno Tasso, and Michele Tonelli. "Journey on Naphthoquinone and Anthraquinone Derivatives: New Insights in Alzheimer’s Disease." Pharmaceuticals 14, no. 1 (2021): 33. http://dx.doi.org/10.3390/ph14010033.

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Alzheimer’s disease (AD) is a progressive neurodegenerative disease that is characterized by memory loss, cognitive impairment, and functional decline leading to dementia and death. AD imposes neuronal death by the intricate interplay of different neurochemical factors, which continue to inspire the medicinal chemist as molecular targets for the development of new agents for the treatment of AD with diverse mechanisms of action, but also depict a more complex AD scenario. Within the wide variety of reported molecules, this review summarizes and offers a global overview of recent advancements o

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Holikova, Olena. "Formalisation of agricultural research." Linguistics and Culture Review 5, S4 (2021): 1137–53. http://dx.doi.org/10.21744/lingcure.v5ns4.1751.

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As an independent component of modern research in natural sciences, branch research developed as a result of the accumulation of knowledge from three spheres of public activity – agriculture, branch-specific education, and agricultural research – under the influence of a complex interaction of many external factors. The purpose of this study is to investigate the initial stage of formalization of agricultural research as a branch of natural sciences with the development of corresponding sign-symbolic systems and terminology. Based on the study of printed and archival research of the Imperial F

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Javaid, Muhammad, and Muhammad Imran. "Editorial: Topological investigations of chemical networks." Main Group Metal Chemistry 44, no. 1 (2021): 267–69. http://dx.doi.org/10.1515/mgmc-2021-0030.

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Abstract The topic of computing the topological indices (TIs) being a graph-theoretic modeling of the networks or discrete structures has become an important area of research nowadays because of its immense applications in various branches of the applied sciences. TIs have played a vital role in mathematical chemistry since the pioneering work of famous chemist Harry Wiener in 1947. However, in recent years, their capability and popularity has increased significantly because of the findings of the different physical and chemical investigations in the various chemical networks and the structure

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Clary, David C., and Brian J. Orr. "Amyand David Buckingham. 28 January 1930—4 February 2021." Biographical Memoirs of Fellows of the Royal Society 72 (December 8, 2021): 77–99. http://dx.doi.org/10.1098/rsbm.2021.0026.

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David Buckingham was a chemical physicist and theoretical chemist who made fundamental contributions to the understanding of optical, electric and magnetic properties of molecules. Born in Australia, he was an undergraduate at the University of Sydney and the first PhD research student of John Pople (FRS 1961) at Cambridge, and there he made significant advances in the theory of intermolecular forces and nonlinear optics. He then moved to Oxford, where he and his group performed the first direct measurement of a molecular electric quadrupole moment. He was elected to the first chair of theoret

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Papp-Wallace, Krisztina M., Andrea Endimiani, Magdalena A. Taracila, and Robert A. Bonomo. "Carbapenems: Past, Present, and Future." Antimicrobial Agents and Chemotherapy 55, no. 11 (2011): 4943–60. http://dx.doi.org/10.1128/aac.00296-11.

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ABSTRACTIn this review, we summarize the current “state of the art” of carbapenem antibiotics and their role in our antimicrobial armamentarium. Among the β-lactams currently available, carbapenems are unique because they are relatively resistant to hydrolysis by most β-lactamases, in some cases act as “slow substrates” or inhibitors of β-lactamases, and still target penicillin binding proteins. This “value-added feature” of inhibiting β-lactamases serves as a major rationale for expansion of this class of β-lactams. We describe the initial discovery and development of the carbapenem family of

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Swyngedouw, Erik. "Depoliticized Environments: The End of Nature, Climate Change and the Post-Political Condition." Royal Institute of Philosophy Supplement 69 (September 22, 2011): 253–74. http://dx.doi.org/10.1017/s1358246111000300.

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Nobel-price winning atmospheric chemist Paul Crutzen introduced in 2000 the concept of the Anthropocene as the name for the successor geological period to the Holocene. The Holocene started about 12,000 years ago and is characterized by the relatively stable and temperate climatic and environmental conditions that were conducive to the development of human societies. Until recently, human development had relatively little impact on the dynamics of geological time. Although disagreement exists over the exact birth date of the Anthropocene, it is indisputable that the impact of human activity on

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Lumley, James A., Gary Sharman, Thomas Wilkin, Matthew Hirst, Carlos Cobas, and Michael Goebel. "A KNIME Workflow for Automated Structure Verification." SLAS DISCOVERY: Advancing the Science of Drug Discovery 25, no. 8 (2020): 950–56. http://dx.doi.org/10.1177/2472555220907091.

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Adequate characterization of chemical entities made for biological screening in the drug discovery context is critical. Incorrectly characterized structures lead to mistakes in the interpretation of structure–activity relationships and confuse an already multidimensional optimization problem. Mistakes in the later use of these compounds waste money and valuable resources in a discovery process already under cost pressure. Left unidentified, these errors lead to problems in project data packages during quality review. At worst, they put intellectual property and patent integrity at risk. We des

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Holikova, Olena. "Scientific and organizational principles of agricultural research in 18-19th centuries." RIVISTA DI STUDI SULLA SOSTENIBILITA' 12, no. 2 (2023): 143–64. http://dx.doi.org/10.3280/riss2022-002010.

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As an independent component of modern research in natural sciences, branch re-search developed as a result of the accumulation of knowledge from three spheres of public activity - agriculture, branch-specific education, and agricultural re-search - under the influence of a complex interaction of many external factors. The purpose of this study is to investigate the initial stage of formalization of agri-cultural research as a branch of natural sciences with the development of a corre-sponding sign-symbolic system and terminology. Based on the study of printed and archival research of the Imper

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Goswami, Arunava. "Aspirin in a new role in human body." Journal of Medical pharmaceutical and allied sciences 12, no. 6 (2023): 6281–84. http://dx.doi.org/10.55522/jmpas.v12i6.5834.

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In 1897, German chemist Felix Hoffman synthesized acetylsalicylic acid, known as aspirin, which revolutionized its widespread modern use for pain relief. Aspirin acts as an inhibitor of cyclooxygenase-1 (COX-1) and has a modifying effect on the enzymatic activity of cyclooxygenase-2 (COX-2). It inhibits the production of prostaglandins, crucial for various physiological processes, and has been linked to a reduced risk of pre-eclampsia and preterm delivery before 34 weeks of pregnancy. However, aspirin's COX-1 inhibition is irreversible and long-lasting, requiring new enzymes to replace those a

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Земцова, С. И. "THE SUBJECT OF INTERROGATION OF THE “CHEMIST”, “COOKER”, “SUPPLIER”, “CURATOR” AND ORGANIZER DURING THE INVESTIGATION OF THE IDENTIFIED DRUG PRODUCTION." Digest of research works "Criminalistics: yesterday, today, tomorrow", no. 3(23) (September 30, 2022): 74–83. http://dx.doi.org/10.55001/2587-9820.2022.42.41.007.

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В статье акцентируется внимание на значительном увеличении количества выявленных правоохранительными органами преступлений, связанных с производством синтетических наркотических средств в лабораториях «конструкторского типа», совершенных организованными преступными группами (сообществами). Отмечается, что, как правило, эта деятельность взаимосвязана с последующим незаконным сбытом с использованием интернет-магазинов и легализацией наркодоходов. Обращается внимание на необходимость разработки полноценной методики расследования данного вида преступлений с учетом существенной трансформации способ

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