Immobilized Biological Compounds in Defense Applications

1993 ◽  
pp. 359-368
Author(s):  
Sheila J. Wood
Keyword(s):  
Biological Compounds

Simultaneous Determination of Epinephrine and Tyrosine Using a Glassy Carbon Electrode Amplified with ZnO-Pt/CNTs Nanocomposite

2019 ◽  
Vol 15 (2) ◽  
pp. 166-171 ◽  
Author(s):  
Ali Samadzadeh ◽  
Iran Sheikhshoaie ◽  
Hassan Karimi-Maleh
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Simultaneous Analysis ◽  
Urine Samples ◽  
Carbon Electrode ◽  
Linear Dynamic ◽  
Biological Compounds ◽  
Blood And Urine Samples ◽  
Human Blood And Urine

Background: Simultaneous analysis of epinephrine and tyrosine as two effective and important biological compounds in human blood and urine samples are very important for the investigation of human health. Objective: In this research, a highly effective voltammetric sensor fabricated for simultaneous analysis of epinephrine and tyrosine. The sensor was fabricated by the modification of glassy carbon electrode with ZnO-Pt/CNTs nanocomposite (ZnO-Pt/CNTs/GCE). The synthesized nanocomposite was characterized by SEM method. The ZnO-Pt/CNTs/GCE showed two separated oxidation signals at potential ~220 mV and 700 mV for epinephrine and tyrosine, respectively. Also, we detected linear dynamic ranges 0.5-250.0 µM and 1.0-220 µM with a limit of detections 0.1 µM and 0.5 µM for the determination of epinephrine and tyrosine, respectively. The ZnO-Pt/CNTs/GCE was used for the determination of epinephrine and tyrosine in blood serum and human urine samples.

Natural Compounds and Drug Discovery: Can Cnidarian Venom Play a Role?

2019 ◽  
Vol 19 (2) ◽  
pp. 114-118
Author(s):  
Gian Luigi Mariottini ◽  
Irwin Darren Grice
Keyword(s):  
Biological Activity ◽  
Marine Species ◽  
Natural Compounds ◽  
Therapeutic Agents ◽  
Industrial Applications ◽  
Bioactive Molecules ◽  
Sea Anemones ◽  
Therapeutic Approaches ◽  
Ongoing Research ◽  
Biological Compounds

Natural compounds extracted from organisms and microorganisms are an important resource for the development of drugs and bioactive molecules. Many such compounds have made valuable contributions in diverse fields such as human health, pharmaceutics and industrial applications. Presently, however, research on investigating natural compounds from marine organisms is scarce. This is somewhat surprising considering that the marine environment makes a major contribution to Earth's ecosystems and consequently possesses a vast storehouse of diverse marine species. Interestingly, of the marine bioactive natural compounds identified to date, many are venoms, coming from Cnidarians (jellyfish, sea anemones, corals). Cnidarians are therefore particularly interesting marine species, producing important biological compounds that warrant further investigation for their development as possible therapeutic agents. From an experimental aspect, this review aims to emphasize and update the current scientific knowledge reported on selected biological activity (antiinflammatory, antimicrobial, antitumoral, anticoagulant, along with several less studied effects) of Cnidarian venoms/extracts, highlighting potential aspects for ongoing research towards their utilization in human therapeutic approaches.

scholarly journals Recent Advances in Chiral Analysis of Proteins and Peptides

Separations ◽  
2021 ◽  
Vol 8 (8) ◽  
pp. 112
Author(s):  
Marine Morvan ◽  
Ivan Mikšík
Keyword(s):  
Amino Acids ◽  
Stationary Phases ◽  
Enzymatic Digestion ◽  
Chiral Separations ◽  
Biological Compounds ◽  
Health And Disease ◽  
Electrophoretic Techniques ◽  
A Site ◽  
Future Work ◽  
Proteins And Peptides

Like many biological compounds, proteins are found primarily in their homochiral form. However, homochirality is not guaranteed throughout life. Determining their chiral proteinogenic sequence is a complex analytical challenge. This is because certain D-amino acids contained in proteins play a role in human health and disease. This is the case, for example, with D-Asp in elastin, β-amyloid and α-crystallin which, respectively, have an action on arteriosclerosis, Alzheimer's disease and cataracts. Sequence-dependent and sequence-independent are the two strategies for detecting the presence and position of D-amino acids in proteins. These methods rely on enzymatic digestion by a site-specific enzyme and acid hydrolysis in a deuterium or tritium environment to limit the natural racemization of amino acids. In this review, chromatographic and electrophoretic techniques, such as LC, SFC, GC and CE, will be recently developed (2018–2020) for the enantioseparation of amino acids and peptides. For future work, the discovery and development of new chiral stationary phases and derivatization reagents could increase the resolution of chiral separations.

PAPER CHROMATOGRAPHY OF COMPLEX BIOLOGICAL MATERIALS BY SOLVENT REDEVELOPMENT WITHOUT PRIOR REMOVAL OF SALTS OR PROTEINS

1960 ◽  
Vol 38 (10) ◽  
pp. 1137-1147 ◽  
Author(s):  
Arthur E. Pasieka
Keyword(s):  
Amino Acids ◽  
Paper Chromatography ◽  
Filter Paper ◽  
Complex Mixtures ◽  
Two Dimensional ◽  
One Dimensional ◽  
Equivalent Time ◽  
Biological Compounds ◽  
High Concentrations ◽  
Subsequent Staining

A solvent redeveloping technique has been devised by which amino acids, peptides, and sugars can be separated from complex mixtures in the presence of high concentrations of salts and proteins. The separations are effected by two to four successive 18-hour solvent developments with drying between each 18-hour period before subsequent staining of the chromatograms. Better separations and resolutions are obtained by such successive 18-hour solvent developments than by one continuous solvent development for an equivalent time. The effect of these redevelopments on the separations and resolutions of biological compounds is illustrated at various stages by photographs of one- and two-dimensional chromatograms. The redevelopment technique requires filter paper sheets up to 4 ft in length for one-dimensional analytical and preparative types of chromatograms.

scholarly journals Data-Driven Analysis of Fluorination of Ligands of Aminergic G Protein Coupled Receptors

Biomolecules ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1647
Author(s):  
Wojciech Pietruś ◽  
Rafał Kurczab ◽  
Dagmar Stumpfe ◽  
Andrzej J. Bojarski ◽  
Jürgen Bajorath
Keyword(s):  
G Protein ◽  
G Protein Coupled Receptors ◽  
Ortho Position ◽  
Receptor Ligands ◽  
Clear Trend ◽  
Highly Active ◽  
Biological Compounds ◽  
Common Strategy ◽  
Negative Effect ◽  
G Protein Coupled

Currently, G protein-coupled receptors are the targets with the highest number of drugs in many therapeutic areas. Fluorination has become a common strategy in designing highly active biological compounds, as evidenced by the steadily increasing number of newly approved fluorine-containing drugs. Herein, we identified in the ChEMBL database and analysed 1554 target-based FSAR sets (non-fluorinated compounds and their fluorinated analogues) comprising 966 unique non-fluorinated and 2457 unique fluorinated compounds active against 33 different aminergic GPCRs. Although a relatively small number of activity cliffs (defined as a pair of structurally similar compounds showing significant differences of activity −ΔpPot > 1.7) was found in FSAR sets, it is clear that appropriately introduced fluorine can increase ligand potency more than 50-fold. The analysis of matched molecular pairs (MMPs) networks indicated that the fluorination of the aromatic ring showed no clear trend towards a positive or negative effect on affinity; however, a favourable site for a positive potency effect of fluorination was the ortho position. Fluorination of aliphatic fragments more often led to a decrease in biological activity. The results may constitute the rules of thumb for fluorination of aminergic receptor ligands and provide insights into the role of fluorine substitutions in medicinal chemistry.

scholarly journals The effect of ultrasound on the treatment of domestic wastewater from organic and biological contamination

2020 ◽  
Vol 8 (1) ◽  
pp. 125-132
Author(s):  
Uliana Vashkurak ◽  
Liliya Shevchuk ◽  
Ivan Aftanaziv ◽  
Anna Romaniv
Keyword(s):  
Water Purification ◽  
Organic Contaminants ◽  
Effective Rate Constant ◽  
Domestic Wastewater ◽  
Effective Rate ◽  
Biological Contamination ◽  
Biological Compounds ◽  
Biological Contaminants ◽  
The Common ◽  
Common Action

The effectiveness of the uses of ultrasonic cavitation for wastewater treatment has been investigated. The influence of the gases of different nature (nitrogen, oxygen, air, mixture of nitrogen and oxygen gases in the ratio of 1:1) on the destruction of organic and biological contaminants has been carried out. It is confirmed that ultrasound cavitation increases the purification effect of gases. It is established that the deepest purification from organic contaminants was achieved by the common action of air with ultrasound, the degree of water purification from organic compounds being 80% and from biological contaminants – by the common action of nitrogen with ultrasound – the degree of water purification from biological compounds being 99,5%. The effective rate constant was calculated.

scholarly journals Quantitative and Qualitative Identification of Phytochemical Constituents of Sida Rhombifolia Leaves Extract

2019 ◽  
Vol 8 (2S4) ◽  
pp. 403-408
Keyword(s):  
Quantitative Analysis ◽  
Cardiac Glycosides ◽  
Total Content ◽  
Phytochemical Analysis ◽  
Phytochemical Screening ◽  
Biological Compounds ◽  
Potential Sources ◽  
Pharmaceutical Industries ◽  
Phytochemical Constituents ◽  
Sida Rhombifolia

Anti-inflammatory, analgesic, antimicrobial, anti-arthritic, antibacterial, antispasmodic, hypoglycaemic and hepatoprotective characteristics of Sida rhombifolia are included in the Malvaceae family. Most of the plant belongs to the Malvaceae family, as they comprise a number of phytochemicals and biological compounds, are potential sources of different medications. This is study on Sida rhombifolia leaf extract's tophytochemical constituen ts. Phytochemical screening results in herbal stan-dardizat ion and preparation and may relate the components to thei r medicinal / pharmacological uses. The qualitative phytochemical analysis has shown that the extract is positive for saponins, flavonoids, alkaloids, phenols and same extract is negative for carbohydrate, tannins, glycosides, cardiac glycosides, terpenoids, coumarins, steroid& phytosteroids, phlobutanins, anthraquinones. Quantitative analysis of phytochemicals includes the estimation of flavonoid, tannin and total content of phenol. The result suggest that the Sida rhombifolia leaves extract consist plenty of phytochemicals beneficial in alternative medical and pharmaceutical industries.

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