Results 11 to 20 of about 213,179 (199)

Ultrasonic and spectroscopic investigations of molecular interactions in binary mixture of PEG-400 and DMSO at different temperatures [PDF]

Journal of the Serbian Chemical Society
In the present study, the ultrasonic velocity and density data for the binary mixture of polyethylene glycol (PEG)-400 and dimethyl sulfoxide (DMSO), at various concentrations and different temperatures (T, 288.15, 298.15 and 308.15 K), have been ...
Dhiman Monika, Upmanyu Arun, Singh Devinder Pal, Juglan Kailash Chandra   +3 more
doaj   +1 more source

Descriminant analysis of flowers, leaves, stems of combretum indicum varr.M and Varr.B with UV-vis spectrophotometric chemometric method [PDF]

E3S Web of Conferences, 2023
Combertum indicum has two varieties, namely varr.M and Varr.B., so to maintain the truth of the sample it is necessary to discriminate. The way to distinguish these two varieties can use the UV-vis spectrophotometric approach.
Hadi Samsul, Khairunnisa Amalia, Nastiti Kunti   +2 more
doaj   +1 more source

Estratégias para aumento de sensibilidade em espectrofotometria UV-VIS Strategies to increase sensitivity in UV-VIS spectrophotometry

Química Nova, 2004
Spectrophotometry is one of the most widespread analytical techniques due to its simplicity, reliability, and low-cost instrumentation for both direct measurements and coupled to other techniques or processes such as chromatography, electrophoresis and ...
Fábio R. P. Rocha, Leonardo S. G. Teixeira   +1 more
doaj   +1 more source

Machine learning prediction of UV–Vis spectra features of organic compounds related to photoreactive potential

Scientific Reports, 2021
Machine learning (ML) algorithms were explored for the classification of the UV–Vis absorption spectrum of organic molecules based on molecular descriptors and fingerprints generated from 2D chemical structures.
Rafael Mamede, Florbela Pereira, João Aires-de-Sousa   +2 more
doaj   +1 more source

Classification of Makasar Fruit Extract (Brucea javanica L. Merr.) Based on The Level of Ripeness Using a Combination of FTIR and UV-Vis Spectroscopy with Chemometrics

Jurnal Kimia Sains dan Aplikasi, 2023
Makasar fruit (Brucea javanica L. Merr) is a medicinal plant frequently utilized in Indonesia for its anti-malarial, anti-diabetic, antioxidant, and antibacterial properties. This research aims to classify extracts from B.
Charles Banon, Deni Agus Triawan, Morina Adfa, Monica Santa Ana Sihite, Ria Nurwidiyani, Widia Rahmi   +5 more
doaj   +1 more source

ANALISA FLAVONOID DARI EKSTRAK ETANOL 96% KULIT BUAH OKRA MERAH (Abelmoschus esculentus L. Moench) SECARA KROMATOGRAFI LAPIS TIPIS DAN SPEKTROFOTOMETRI UV-VIS

JIIS: Jurnal Ilmiah Ibnu Sina, 2016
Telah dilakukan penelitian tentang Analisa Flavonoid dari Ekstrak Etanol 96% Kulit Buah Okra Merah Secara Kromatografi Lapis Tipis dan Spektrofotometer UV-Vis.
Nia Lisnawati, Indri Astuti Handayani, Ni'matul Fajrianti   +2 more
doaj   +3 more sources

A Real-Time Ultraviolet Radiation Imaging System Using an Organic Photoconductive Image Sensor

Sensors, 2018
We have developed a real time ultraviolet (UV) imaging system that can visualize both invisible UV light and a visible (VIS) background scene in an outdoor environment.
Toru Okino, Seiji Yamahira, Shota Yamada, Yutaka Hirose, Akihiro Odagawa, Yoshihisa Kato, Tsuyoshi Tanaka   +6 more
doaj   +1 more source

Thermodynamic characterisation of triazol ylimino-DNA interaction by UV–Vis spectroscopy

Journal of Photochemistry and Photobiology, 2020
To efficiently design improved therapeutic agent, study of molecule-DNA interaction is a crucial step. In our previous study, we investigated comprehensive mechanism of some 1,2,4 triazol-4-ylimino derivatives, and they exhibited excellent in vitro anti ...
Rafia Nimal, Afzal Shah, Muhammad Saddiq
doaj   +1 more source

Data Fusion of UV-Vis and FTIR Spectra Combined with Principal Component Analysis for Distinguishing of Andrographis paniculata Extracts Based on Cultivation Ages and Solvent Extraction

Indonesian Journal of Chemistry, 2021
Andrographis paniculata is one of the medicinal plants used for the treatment of antidiabetic. Cultivation ages and solvent extraction affected metabolites' composition and concentration that directly cause the plant's efficacies.
Antonio Kautsar, Wulan Tri Wahyuni, Utami Dyah Syafitri, Syifa Muflihah, Nursifa Mawadah, Eti Rohaeti, Zulhan Arif, Bambang Prajogo, Muhammad Bachri Amran, Abdul Rohman, Mohamad Rafi   +10 more
doaj   +1 more source

Predicting the UV–vis spectra of oxazine dyes

Beilstein Journal of Organic Chemistry, 2011
In the current work we have investigated the ability of time-dependent density functional theory (TD-DFT) to predict the absorption spectra of a series of oxazine dyes and the effect of solvent on the accuracy of these predictions.
Scott Fleming, Andrew Mills, Tell Tuttle
doaj   +1 more source