Study of the effect of some physical and chemical factors on the biological properties and chemıcal composition of viper venom

2020 ◽  
Vol 12 (1) ◽  
pp. 29-36
Author(s):  
H. A. Abiyev ◽  
E. S. Jafarov ◽  
Sh. A. Sh. A. Topchiyeva ◽  
H. G. Babayev ◽  
Kh. R. Mammadova
Keyword(s):  
Chemical Composition ◽  
Biological Properties ◽  
Chemical Factors ◽  
Physical And Chemical

scholarly journals Nickel effects on productivity of algal periphyton communities

2015 ◽  
Vol 50 (4) ◽  
pp. 369-374
Author(s):  
Hamid Reza Ghassemi
Keyword(s):  
Chlorophyll A ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Dry Mass ◽  
Biological Properties ◽  
Nickel Concentration ◽  
Artificial Streams ◽  
Chemical Factors ◽  
Physical And Chemical

In order to evaluate the long-term (30-day) influence of nickel on biomass of periphyton communities, indoor artificial streams were used with differing nickel concentration (2.5, 5, and 7.5 mg/l). Physical and chemical factors (pH, NO3-N, PO4-P, dissolved oxygen, total suspended solids, conductivity, total dissolved solids, biochemical oxygen demand, and chemical oxygen demand) were measured along with biological properties of the periphyton. The effects of nickel on periphyton communities were assessed by measuring dry mass, ash-free dry mass (AFDM), chlorophyll-a, and rate of nickel absorption. In artificial streams with nickel, there was a significant (P < 0.05) reduction of chlorophyll-a, AFDM, and dry mass under the influence of nickel. These observations suggest that the periphyton community could serve as an indicator of nickel pollution.

Chemical composition and biological properties of Piper cabralanum C. DC. (Piperaceae)

Planta Medica ◽  
2014 ◽  
Vol 80 (16) ◽  
Author(s):  
D Moreira ◽  
F Candido ◽  
M Siqueira ◽  
C Quaresma ◽  
E Guimarâes ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Biological Properties

STUDY OF CORIANDER SEED OIL (Coriandrum sativum L.)

2010 ◽  
Vol 13 (3) ◽  
pp. 29-38
Author(s):  
Ha Bich Phan ◽  
Thach Ngoc Le
Keyword(s):  
Biological Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Seed Oil ◽  
Coriandrum Sativum ◽  
Conventional Heating ◽  
Geranyl Acetate ◽  
Physical And Chemical ◽  
Coriander Seed Oil ◽  
Coriander Seed

Coriandrum sativum L. belongs to the Apiaceae family, which is cultivated in Dong Nai province, in this paper its seed oil of was studied. The essential oil was extracted by hydrodistillation. We used two methods for activating of hydrodistillation: conventional heating and microwave irradiating. Its physical and chemical indexes were measured. The chemical composition of this oil was identified by GC/MS and quantified by GC/FID. Linalool (75.51-77.21 %), and geranyl acetate (15.64-12.79 %) were the main constituents of the oil which were obtained in 0,32-0.39 % yield. The biological activity of this oil was reported.

BACTERIA CONTENT, PHYSICAL AND CHEMICAL COMPOSITION OF BROILER MEAT GROWN ON THE HEATED FLOOR

2018 ◽  
Vol 20 (6) ◽  
pp. 24-25
Author(s):  
E.O. Kachanova ◽  
◽  
E.V. Pavlova ◽  
D.S. Derina ◽  
◽  
...  
Keyword(s):  
Chemical Composition ◽  
Broiler Meat ◽  
Heated Floor ◽  
Physical And Chemical

scholarly journals Evaluation of Antimicrobial, Antioxidant, and Cytotoxic Activity of Phenolic Preparations of Diverse Composition, Obtained from Elaeagnus rhamnoides (L.) A. Nelson Leaf and Twig Extracts

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2835
Author(s):  
Anna Stochmal ◽  
Bartosz Skalski ◽  
Rostyslav Pietukhov ◽  
Beata Sadowska ◽  
Joanna Rywaniak ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Plasma Lipids ◽  
Biological Properties ◽  
Sea Buckthorn ◽  
Phenolic Antioxidants ◽  
Microdilution Method ◽  
Solid Media ◽  
Broth Microdilution Method ◽  
Markers Of Oxidative Stress

Although the major components of various organs of sea buckthorn have been identified (particularly phenolic compounds), biological properties of many of these phytochemicals still remain poorly characterized. In this study, we focused on the chemical composition and biological activity of preparations that were obtained from sea buckthorn twigs and leaves. The objective was to investigate cytotoxicity of these preparations against human fibroblast line HFF-1, using MTT reduction assay, their anti- or pro-oxidant activities against the effects of a biological oxidant -H2O2/Fe—on human plasma lipids and proteins in vitro (using TBARS and carbonyl groups as the markers of oxidative stress). Antimicrobial activity of the tested preparations against Gram-positive (Staphylococcus aureus, S. epidermidis, Enterococcus faecalis) and Gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa), as well as against fungi (Candida albicans, C. glabrata) by the EUCAST-approved broth microdilution method, followed by growth on solid media, were also assessed. Our analysis showed significant differences in chemical composition and biological properties of the tested preparations (A–F). All tested preparations from sea buckthorn twigs (D–F) and one preparation from sea buckthorn leaves (preparation C) may be a new source of phenolic antioxidants for pharmacological and cosmetic applications.

Nanobiotechnology: Nature-inspired silver nanoparticles towards green synthesis

2021 ◽  
pp. 0958305X2198988
Author(s):  
Nur Syakirah Rabiha Rosman ◽  
Noor Aniza Harun ◽  
Izwandy Idris ◽  
Wan Iryani Wan Ismail
Keyword(s):  
Electrical Conductivity ◽  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Metal Nanoparticles ◽  
Current Trend ◽  
Biological Properties ◽  
Noble Metal Nanoparticles ◽  
Current Application ◽  
Physical Chemical ◽  
Physical And Chemical

The emergence of technology to produce nanoparticles (1 nm – 100 nm in size) has drawn significant researchers’ interests. Nanoparticles can boost the antimicrobial, catalytic, optical, and electrical conductivity properties, which cannot be achieved by their corresponding bulk. Among other noble metal nanoparticles, silver nanoparticles (AgNPs) have attained a special emphasis in the industry due to their superior physical, chemical, and biological properties, closely linked to their shapes, sizes, and morphologies. Proper knowledge of these NPs is essential to maximise the potential of biosynthesised AgNPs in various applications while mitigating risks to humans and the environment. This paper aims to critically review the global consumption of AgNPs and compare the AgNPs synthesis between conventional methods (physical and chemical) and current trend method (biological). Related work, advantages, and drawbacks are also highlighted. Pertinently, this review extensively discusses the current application of AgNPs in various fields. Lastly, the challenges and prospects of biosynthesised AgNPs, including application safety, oxidation, and stability, commercialisation, and sustainability of resources towards a green environment, were discussed.

Coronatine elicitation alters chemical composition and biological properties of cumin seed essential oil

2019 ◽  
Vol 130 ◽  
pp. 253-258 ◽  
Author(s):  
Seyedeh Faezeh Taghizadeh ◽  
Ramin Rezaee ◽  
Masoumeh Mehmandoust ◽  
Fatemeh Sadat Madarshahi ◽  
Aristidis Tsatsakis ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Biological Properties ◽  
Cumin Seed

Further Studies upon Chemical Factors Affecting the Breeding of Anopheles in Trinidad

1934 ◽  
Vol 25 (4) ◽  
pp. 491-494 ◽  
Author(s):  
P. A. Buxton
Keyword(s):  
Analytical Study ◽  
Chemical Constituents ◽  
Physical Factors ◽  
Factors Affecting ◽  
Early Stages ◽  
Freshwater Biology ◽  
Chemical Technique ◽  
Chemical Factors ◽  
Physical And Chemical

During the last decade, entomologists have made progress in understanding the environment in which certain insects live; in particular, we begin to understand the effect of certain physical and chemical factors, which make up a part of the environment. With this gain in knowledge, it is sometimes possible to forecast outbreaks of insects and of diseases conveyed by them, and one can sometimes say that a particular alteration of the environment will result in loss or gain. But so far as mosquitos are concerned, one must admit that though much work has been devoted to the analytical study of the water in which the early stages are passed, the results are disappointing. A consideration of the published work suggests several reasons for this. Investigation into the ecology of the mosquito has had a vogue, and much of it has been done by workers who were isolated and whose knowledge of chemical technique and freshwater biology was limited. Apart from that, the inherent difficulties are great, for the worker must hunt for the limiting chemical and physical factors among a host of others which are doubtless unimportant, and there are few clues to indicate which of the chemical constituents of the water affects the mosquito. The data are therefore voluminous and it is difficult to reduce them to order and present them so that they can be readily understood.

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