Results 51 to 60 of about 418,242 (295)

Structural and biochemical insights into the thermostable esterase Ta0887 from Thermoplasma acidophilum

open access: yesFEBS Open Bio, EarlyView.
In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey   +4 more
wiley   +1 more source

Comparative assessment of the nature of the impact of ultraviolet radiation on watermelon seeds in time mode

open access: yesОвощи России, 2019
Relevance. One of the main components of the spectrum of sunlight is ultraviolet rays – invisible to the human eye short-wave radiation. The influence of these rays on plant life was considered insignificant until recently, but recent studies have shown ...
A. V. Gulin, V. I. Donskaya
doaj   +1 more source

Ultraviolet radiation and melanogenesis [PDF]

open access: yesArchive of Oncology, 2004
Light radiation is a part of the electromagnetic radiation, and it consists of the ultraviolet (UV) radiation, visible light, and infrared radiation.
Stanojević Milenko R.   +3 more
doaj   +1 more source

Symbolic Regression and Multi‐Objective Optimization of the Flory–Huggins Interaction Parameter for Hydrogels

open access: yesAdvanced Engineering Materials, EarlyView.
We develop a data‐driven method to derive the mathematical expressions of the Flory–Huggins interaction parameter χ for the swelling behavior of temperature–responsive hydrogels. Starting from initial assumptions of χ, our workflow combines Bayesian optimization, Flory–Rehner theory, and symbolic regression to generate candidate χ expressions.
Yawen Wang   +2 more
wiley   +1 more source

Quantitative Absorption Tomography Using Polychromatic X-rays

open access: yes, 2023
Submission note: A thesis submitted in total fulfilment of the requirements for the degree of Doctor of Philosophy to the Department of Chemistry and Physics, La Trobe Molecular Sciences School, College of Science, Health and Engineering, La Trobe ...
Eyou, Aileen Yowaresh Eyou (14373579)
core   +2 more sources

Additive Manufacturing of Alumina‐Reinforced Elastomers

open access: yesAdvanced Engineering Materials, EarlyView.
Vat‐photopolymerized elastomers reinforced with platelet‐shaped alumina exhibited preferential orientation, reduced porosity, and significantly enhanced mechanical performance. A 3 wt% platelet loading increased tensile strength from 12.4 to 45.7 MPa, highlighting the critical role of filler morphology in elastomeric VPP composites.
Majid Barzegar Keyvani   +6 more
wiley   +1 more source

X-rays and Extreme Ultraviolet Radiation: Principles and Applications

open access: yes, 2019
X-Rays and Extreme Ultraviolet Radiation: Principles and Applications, D. Attwood, A.
Vesselli, Erik
core   +1 more source

Total ozone column above the territory of Serbia and Montenegro [PDF]

open access: yesSrpski Arhiv za Celokupno Lekarstvo, 2006
Introduction: Atmospheric ozone attenuates ultraviolet radiation reaching the Earth’s surface. Since UV-B radiation is considered the principal factor of causing the skin cancers, cataracts and some immunological disorders, determination of total ozone ...
Letić Milorad
doaj   +1 more source

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

open access: yesAdvanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali   +5 more
wiley   +1 more source

Effect and investigating of graphene nanoparticles on mechanical, physical properties of polylactic acid polymer

open access: yesCase Studies in Chemical and Environmental Engineering
Polylactic acid (PLA) is a linear aliphatic polyester thermoplastic made from renewable sources such as sugar beet and cornstarch. Methods of preparation of polylactic acid are biological and chemical.
Yathrib Ajaj   +9 more
doaj   +1 more source

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