Results 101 to 110 of about 84,237 (324)

The moss Bryum argenteum var. muticum Brid. is well adapted to cope with high light in continental Antarctica [PDF]

, 2012
The net photosynthetic rate (NP), chlorophyll fluorescence, carotenoid content and chlorophyll content of the cosmopolitan moss Bryum argenteum were measured in the field at Botany Bay, southern Victoria Land, continental Antarctica (77°S).
Green, T.G. Allan, Kulle, Daniel, Pannewitz, Stefan, Sancho, Leopoldo G., Schlensog, Mark, Schroeter, Burkhard   +5 more
core   +3 more sources

Silent Partners in the Mill: Unveiling the Role of Additives in Mechanochemical Synthesis

Chemistry – A European Journal, EarlyView.
Mechanochemistry offers a sustainable, solvent‐free alternative to traditional synthesis, often enhanced by additives in a process known as additive‐assisted grinding. This review discusses how various additives, including liquids, ionic solids, and advanced materials like ionic liquids and piezoelectric compounds, improve reaction efficiency ...
Johanna Breinsperger, Nika Podlesnik, Francesco Mele, Michael Schnürch   +3 more
wiley   +1 more source

ROLE OF Mn(TPP)Cl IN THE EPOXIDATION WITH SINGLET OXYGEN [PDF]

Journal of Sciences, Islamic Republic of Iran, 2000
Mn(TPP)Cl catalyzes cooxidation of olefin in the singlet oxygenation of sulfid. Mn(TPP)Cl is able to transfer an oxygen atom from a peroxidic intermediate generated in singlet oxygenation of sulfide to a metal ion affording metal 0x0 species which is ...
doaj  

Selective and metal-free epoxidation of terminal alkenes by heterogeneous polydioxirane in mild conditions [PDF]

Royal Society Open Science, 2018
Polydioxirane (PDOX) was prepared by the treatment of polysalicylaldehyde with Oxone and was found as a selective, highly efficient and heterogeneous reagent for epoxidation of alkenes which can be successfully isolated.
M. Kazemnejadi, A. Shakeri, M. Nikookar, R. Shademani, M. Mohammadi   +4 more
doaj   +1 more source

Learning Strategies from Nature's Blueprint to Cyclic Carbonate Synthesis

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
The development of sustainable synthetic methods for cyclic carbonates draws inspiration from nature, focusing on eco‐friendly processes and renewable resources like CO2 and biomass. This review explore various CO2 activation mechanisms, green chemistry principles, and green catalysts.
Erika Saccullo, Vincenzo Patamia, Chiara Zagni, Antonio Rescifina, Giuseppe Floresta   +4 more
wiley   +1 more source

Ring Formation in Sesquiterpene Synthesis: Biomimetic vs. Non‐Biomimetic Strategies

European Journal of Organic Chemistry, EarlyView.
A short review of cyclase enzyme‐mediated ring formation in sesquiterpene biosynthesis is presented as a prelude to six case studies examining the merits and demerits of biomimetic vs. non‐biomimetic strategies for carbocyclisation in the total synthesis of this iconic natural product class.
Bohan Lin, Chen Dai, Alan C. Spivey
wiley   +1 more source

Lipase-mediated epoxidation of alkenes in supercritical carbon dioxide

Green Chemistry Letters and Reviews, 2018
In this work, supercritical carbon dioxide was used as reaction media in the lipase-mediated epoxidation of alkenes for the first time. Under the optimal conditions (alkene (1 mmol), novozym 435 (15 mg), H2O2 (50% aqueous solution, 1.4 mmol), n-caprylic ...
Jiaxin Zhang, Wenwei Qian, Chunyu Wang, Ziyi Cao, Shanshan Chen, Liu Zhang, Yang Zhang, Lei Wang   +7 more
doaj   +1 more source

Occurrence and Human Health Implications of Legacy Organochlorine Pesticides and Their Metabolites in Fruits and Vegetables of Bangladesh

Food Safety and Health, EarlyView.
Multiple OCP isomers and/or metabolites along with their parent compounds were detected in commonly consumed fruits and vegetables of Bangladesh, possibly attributed to both recently and historically applied OCPs. However, all the detected values were below 0.01 mg/kg, indicating no potential human health risks through dietary intake. ABSTRACT Globally,
Kazi Sanjana Adnen, Shamima Jahan Sweety, Sadia Shahana Tisha, Md. Mahbubul Hoque, Tanmoy Roy Tusher   +4 more
wiley   +1 more source

Chemoenzymatic Epoxidation of Alkenes and Reusability Study of the Phenylacetic Acid

The Scientific World Journal, 2014
Here, we focused on a simple enzymatic epoxidation of alkenes using lipase and phenylacetic acid. The immobilised Candida antarctica lipase B, Novozym 435 was used to catalyse the formation of peroxy acid instantly from hydrogen peroxide (H2O2) and ...
Emilia Abdulmalek, Mahashanon Arumugam, Hanis Nabillah Mizan, Mohd. Basyaruddin Abdul Rahman, Mahiran Basri, Abu Bakar Salleh   +5 more
doaj   +1 more source

Formation of Tetrahydrofurano-, Aryltetralin, and Butyrolactone Norlignans through the Epoxidation of 9-Norlignans

Molecules, 2020
Epoxidation of the C=C double bond in unsaturated norlignans derived from hydroxymatairesinol was studied. The intermediate epoxides were formed in up to quantitative conversions and were readily further transformed into tetrahydrofuran, aryltetralin ...
Patrik A. Runeberg, Dominique Agustin, Patrik C. Eklund   +2 more
doaj   +1 more source