Spectrophotometric Study of Ephedrine Hydrochloride in Drug using Molecular Absorption UV- Visible

2021 ◽  
pp. 120828
Author(s):  
Alaa H. Alminshid ◽  
Hayder A. Alalwan ◽  
Malik M. Mohammed
Keyword(s):  
Spectrophotometric Study ◽  
Molecular Absorption ◽  
Ephedrine Hydrochloride ◽  
Uv Visible

scholarly journals Ethno-medicinal Species of Cassia (C. fistula, C. siamea, C. tora): Documentation and Metabolites Estimation

2019 ◽  
Vol 7 (3) ◽  
pp. 387-394
Author(s):  
L. Rani ◽  
A. Munjani ◽  
G. Lakra ◽  
A.K. Choudhury ◽  
R.K. Pandey
Keyword(s):  
Spectrophotometric Study ◽  
Acetone Extract ◽  
Cassia Fistula ◽  
Medicinal Species ◽  
Cassia Tora ◽  
Medicinal Uses ◽  
Cassia Siamea ◽  
Chl A ◽  
Medicinal Properties ◽  
Uv Visible

Different species of Cassia found in Jharkhand are consumed as daily vegetables have high nutritional value. Most of them are underutilized and display varied ethenomedicinal values. The work was carried out with an aim to document three ethno medicinal properties of three different species of Cassia, Cassia fistula, Cassia siamea and Cassia tora. The documentation was done among 100 tribal people residing in the area near Morabadi, Ranchi. The knowledge revealed that the three plants were used in almost every tribal houses as a dietary supplement and various medicinal uses. According to the Munda Vaidya’s the plant Cassia is of pitta nature and its different part have different uses. The root is used against tuberculosis glands, diabetes, as a tonic, the root and bark paste mixed in equal amount is used against snake bite.  traditionally it is used as laxative, for the treatment of leprosy and various skin disorders.  the present study aimed to screen and quantify primary and secondary metabolite by quantitative and qualitative method. The pigments (chlorophyll and carotenoid) were characterised by UV visible spectroscopy. Concentration of chlorophyll-a, chlorophyll-b and carotenoid was calculated by Arnon method (80% acetone extract). The spectrophotometric study of the different pigment of the three species of Cassia, Cassia fistula (chl-a 254.516, chl-b 305.741, total chl 533.7 carotenoid 10.6), Cassia siamea (chl-a 257.88, chl-b 393.16, total chl 630.2   carotenoid 9.395), Cassia tora (chl-a 266.36, chl-b 271.96, total chl 538.32 carotenoid 16.3). The result revealed that chl-a was highest in Cassia tora followed by Cassia siamea and Cassia fistula. Chl-b pigment followed   C. siamea> C. fistula>C. tora pattern, total chl C. siemea>C. tora>C. fistula and the carotenoid amount C. tora  > C. fistula > C. siamea. In screening of secondary metabolites tannin, saponins alkaloids, terpenoids, resin Phyto-sterols were carried out on the aqueous extract showed +ve test for all except phyto-sterols and on the powdered specimen gave –ve result in aqueous, ethanol as well as acetone extract. Int. J. Appl. Sci. Biotechnol. Vol 7(3): 387-394  

scholarly journals STUDY OF STRUCTURAL AND FUNCTIONAL COMPOSITION OF SOIL HUMUS ACIDS OF EURO-ARCTIC REGION BY MOLECULAR ABSORPTION SPECTROSCOPY (UV / VISIBLE)

2018 ◽  
Vol 61 (2) ◽  
pp. 97
Author(s):  
Natal'ya S. Prilutskaya ◽  
Tat'yana A. Korel'skaya ◽  
Lyudmila F. Popova
Keyword(s):  
Heavy Metals ◽  
Absorption Spectroscopy ◽  
Arctic Region ◽  
Fulvic Acids ◽  
Functional Composition ◽  
Molecular Absorption ◽  
Soil Humus ◽  
Humus Acids ◽  
Uv Visible ◽  
Molecular Absorption Spectroscopy

Results of the structural and functional composition of soil humus acids in the Euro-Arctic Region are presented. The molecular absorption spectroscopy (UV / visible) was used to evaluate eco-protective role of soils in relation to heavy metals, which is especially important for the sensitive soils of the Arctic, formed under the influence of cryogenic processes. Different types of soils of the Euro-Arctic region: gleyish easy loamy pelosi on loamy moraine (Kanin Peninsula, Cape Kanin Nos); humus peat oligotrophic soil (Kolguev Island, Bugrino village); typical non-calcic loamy gley soil (Vaigach Island); gray humous iron sandy lithozem (Archipelago Franz Josef Land, Heys Island) were analyzed. An alkaline solution of sodium pyrophosphate was used to extract humus acids for investigate of the structural and functional composition. Humic, fulvic and gimatomelanic acids were extracted from a humus by conforming solvents with additional fulvic acids extraction by adsorption chromatography using activated carbon as a sorbent. UV mini-1240 spectrophotometer (Shimadzu) was used to record the UV / visible spectra using 0.005% alkaline solutions (0.1 N NaOH) of humus acids. It was demonstrated that humic and gimatomelanoic acids of humus peat oligotrophic soil have more developed peripheral aliphatic component. These acids have more ability to bind heavy metals and show their eco-protective role. The humus acids of other types of soils region have a more developed aromatic component in the Euro-Arctic. Such parameters as: calculated by the Pieravuori formula aromaticity, extinction coefficient Е0.005%1cm,465, adsorption ratio D400 /D600, characterizing the degree of humification and the adsorption ratio D465 / D650, characterizing the degree of aromatic nucleus condensation and conjugate fragments were used in the quantitative assessment of the nature of humus acids.  Quantitative analysis of UV/visible spectra confirmed that the maximum barrier mechanism with respect to heavy metals will be the humic and gimatomelanoic acids of humus-peat oligotrophic soil, due to the high content of phenolic and carboxyl groups in these molecules, oxidation and a more developed chain of conjugated bonds in them in comparison with other acids. However, it was found that in all types of soils studied the process of humus formation proceeds mainly by a degradation type, that is, in the direction of formation of fulvic acids. Forcitation:Prilutskaya N.S., Korel'skaya T.A., Popova L.F. Study of structural and functional composition of soil humus acids of euro-arctic region by molecular absorption spectroscopy (UV / visible). Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 2. P. 97-103

scholarly journals Synthesis and Characterization of Cobalt(III) Complex of 1,5-bis(2-Hydroxybenzamido)-3- aza pentane and its Interaction with Glutathione: A Kinetic and Spectrophotometric Study

2019 ◽  
Vol 31 (9) ◽  
pp. 2022-2028
Author(s):  
Aravind Rudrarapu ◽  
Gouri Sankhar Brahma ◽  
Suprava Nayak
Keyword(s):  
Electron Transfer ◽  
Activation Parameters ◽  
Outer Sphere ◽  
Spectrophotometric Study ◽  
Nmr Studies ◽  
Nmr Techniques ◽  
Uv Visible ◽  
Time Changes ◽  
Two Peaks

A new octahedral cobalt(III) complex of 1,5-bis(2-hydroxybenzamido)-3-aza pentane was synthesized and characterized by elemental analysis, UV-visible, IR, mass spectrometry and thermal analysis methods. Oxidative behaviour of the complex towards the physiologically abundant tripeptide, glutathione(GSH) was studied by UV-visible and FT-NMR techniques. Kinetics of electron transfer between the complex and GSH was studied at 25.0 ≤ t/°C ≤ 45.0, 0.025 ≤ [H+]/mol dm-3 ≤ 0.20 and I = 1.0 mol dm-3 (NaClO4). NMR spectra of the reaction mixture were taken as a function of time. Changes observed in the NMR-spectrum during the period of scanning are the initial disappearance of the fine structure and subsequent broadening of the signals of GSH protons. Peaks at (δ, ppm): 2.93 and 2.98, characteristics of Cys-CH2 δ protons in GSH get disappear slowly and new peaks develop at (δ, ppm): 3.33 and 3.38, corresponding to resonating frequencies of Cys-CH2 δ protons in GSSG. Likewise, the peak at (δ, ppm):2.93, characteristic of Cys-CH2 δ proton in GSH is replaced by the resurgence of two peaks at (δ, ppm): 4.3 and 4.1 ppm, commensurate with the resonating frequencies of same set of protons as that of GSH but in a dimeric environment. The time dependent NMR simulation of the reaction reveals that GSH reduces the CoIII moiety successfully, while it gets converted into the dimer, GSSG. The relatively fast transformation of GSH to GSSG as evident from both electronic spectra and NMR studies together with the activation parameters obtained from the temperature dependence of reaction rate suggest that there is no involvement of any bridging group for electron transfer and the redox process may be taking place via outer sphere mechanism.

Intrinsic Wavelength Standard Absorption Bands in Holmium Oxide Solution for UV/visible Molecular Absorption Spectrophotometry

2005 ◽  
Vol 34 (1) ◽  
pp. 41-56 ◽  
Author(s):  
John C. Travis ◽  
Joaquin Campos Acosta ◽  
György Andor ◽  
Jean Bastie ◽  
Peter Blattner ◽  
...  
Keyword(s):  
Molecular Absorption ◽  
Absorption Bands ◽  
Absorption Spectrophotometry ◽  
Wavelength Standard ◽  
Uv Visible

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Polarimetric Observations of Red Variables: A Study of Gas and Particle Interactions

1979 ◽  
Vol 46 ◽  
pp. 386-408 ◽  
Author(s):  
G. V. Coyne ◽  
I. S. McLean
Keyword(s):  
Wavelength Dependence ◽  
Stellar Atmosphere ◽  
Molecular Absorption ◽  
Absorption Bands ◽  
Absorption And Emission ◽  
Mira Variables ◽  
Stellar Photosphere ◽  
Regular Variable ◽  
Red Supergiants ◽  
Balmer Lines

AbstractIn recent years the wavelength, dependence of the polarization in a number of Mira variables, semi-regular variables and red supergiants has been measured with resolutions between 0.3 and 300 A over the range 3300 to 11000 A. Variations are seen across molecular absorption bands, especially TiO bands, and across atomic absorption and emission lines, especially the Balmer lines. In most cases one can ignore or it is possible to eliminate the effects due to interstellar polarization, so that one can study the polarization mechanisms operating in the stellar atmosphere and environment. The stars Omicron Ceti. (Mira), V CVn (semi-regular variable) and Mu Cephei (M2 la), in addition to other stars similar to them, will be discussed in some detail.Models to explain the observed polarization consider that the continuum flux is polarized either by electron, molecular and/or grain scattering or by temperature variations and/or geometrical asymmetries over the stellar photosphere. This polarized radiation is affected by atomic and molecular absorption and emission processes at various geometric depths in the stellar atmosphere and envelope. High resolution spectropolarimetry promises, therefore, to be a power-rul tool for studying stratification effects in these stars.

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