scholarly journals Biological Activity and Chemical Characteristics of Fermented Silkworm Powder by Mold

2010 ◽  
Vol 20 (2) ◽  
pp. 237-244 ◽  
Author(s):  
Jae-Young Cha ◽  
Yong-Soon Kim ◽  
Pil-Don Kang ◽  
Hee-Young Ahn ◽  
Kyung-Eun Eom ◽  
...  
Keyword(s):  
Biological Activity ◽  
Chemical Characteristics

scholarly journals Logging and forest decline effects on the surface humus horizons in the Šumava Mts.

2012 ◽  
Vol 52 (No. 10) ◽  
pp. 439-445 ◽  
Author(s):  
V. Podrázský
Keyword(s):  
Biological Activity ◽  
Soil Respiration ◽  
Forest Decline ◽  
Chemical Characteristics ◽  
Concentration Effects ◽  
Standard Methods ◽  
Base Content ◽  
Environmental Function ◽  
Tree Layer ◽  
Humus Horizons

Holorganic layers belong among the key ecosystem components of forest soils at higher altitudes. Increased biological activity of the surface humus is very often observed after forest decline and/or forest cut and removal at these sites. The forest removal or tree layer extinction was studied in the flat, water affected terrain: its effects on the soil chemical characteristics and on the soil respiration, ammonification and nitrification activities. The standard methods of analyses were used. The study proved the increased intensity of nitrification and ammonification in stands with decreased ecological as well as environmental function potentials, further decreased concentrations of magnesium. Due to the concentration effects, the concentrations of some macroelements – nitrogen, calcium – increased in these stands (in the humus form layers), as well as the base content and base saturation.

scholarly journals Talisia esculenta (A. ST.-HIL.) Radlk: physico-chemical characteristics, antioxidant activity and biological activity

2020 ◽  
Vol 9 (2) ◽  
pp. e53921909
Author(s):  
Layanne Nascimento Fraga ◽  
Izabela Maria Montezano de Carvalho
Keyword(s):  
Antioxidant Activity ◽  
Biological Activity ◽  
Chemical Composition ◽  
Chemical Characterization ◽  
Chemical Characteristics ◽  
Review Of The Literature ◽  
Study Objective ◽  
Wild Fruit ◽  
Physico Chemical ◽  
Bioactive Potential

Talisia esculenta (A. ST.-HIL.) Radlk is a Brazilian wild fruit, known as a pitomba, belonging to the Sapindaceae family. The objective of the present work was to perform a review of the literature in order to identify studies on its physico-chemical characterization, antioxidant activity and biological activity. The articles search was done in PubMed, SciELO, Science Direct and LILACS. We identified 90 publications, 8 in SciELO, 3 in LILACS, 67 in Science Direct and 12 in PubMed. Subsequently, duplication of the articles between the databases was verified, and the triage was done by reading the titles, abstracts and reading in full, to analyze which articles fit the study objective, and only 5 studies were included. The review exposes Talisia esculenta Radlk (A. ST.-HIL.) as a fruit that has a bioactive potential, but there is a shortage of studies that deal with its chemical composition and its biological activity.

Insulin-stimulating protein from human plasma. Chemical characteristics and biological activity

1986 ◽  
Vol 161 (2) ◽  
pp. 491-504 ◽  
Author(s):  
Naokatu ARAKAKI ◽  
Akemichi UENO ◽  
Toshiya ORIBE ◽  
Yoshiro TAKEDA ◽  
Toshifumi TAKAO ◽  
...  
Keyword(s):  
Biological Activity ◽  
Human Plasma ◽  
Chemical Characteristics ◽  
Plasma Chemical

Intra- and inter-annual changes in chemistry of Australian glacial lakes

2012 ◽  
Vol 63 (6) ◽  
pp. 513 ◽  
Author(s):  
Ken Green
Keyword(s):  
Biological Activity ◽  
Chemical Characteristics ◽  
Biogeochemical Processes ◽  
Lake Ice ◽  
Nutrient Deposition ◽  
Order Of Magnitude ◽  
Spring Temperatures ◽  
Ionic Pulse ◽  
Annual Changes ◽  
Break Up

The chemical characteristics of five seasonally ice-covered lakes in the Snowy Mountains were measured monthly from 2006 to 2009. Although N and P concentrations were significantly higher in rainfall than snowfall, concentrations peaked in lakes in winter rather than summer. This was linked to continuous winter nutrient flow into the lakes from melting snowpack and continued biogeochemical processes in unfrozen soil at a time when biological activity beneath the lake ice was depressed. In contrast to high altitude lakes elsewhere, there was no spring ionic pulse of nutrients. Lake pH fluctuated throughout the ice-free period between 6.9 and 6.5, falling to 6.1–6.0 beneath ice cover, before rising abruptly after ice break-up. Earlier ice break-up in recent years has resulted in an earlier increase in pH, and decrease in concentrations of NH3-N and NOx-N. In years with least snowfall and early ice break-up, winter peaks of NH3-N were lowest whereas both PO4-P and NOx-N showed winter peaks of various concentrations in medium years rather than extreme years. Rising winter and/or spring temperatures resulting in changes in precipitation from snow to rain could lead to increased nutrient deposition, with rain carrying an order of magnitude more nutrients than does snow.

scholarly journals Studies on Medicago lupulina saponins. 6. Some chemical characteristics and biological activity of root saponins

2014 ◽  
Vol 56 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Wiesław Oleszek ◽  
Marian Jurzysta ◽  
Piotr Górecki ◽  
Stanisław Burda ◽  
Michał Płoszyński
Keyword(s):  
Biological Activity ◽  
Chemical Properties ◽  
Chemical Characteristics ◽  
Two Dimensional ◽  
Medicago Lupulina ◽  
Medicagenic Acid ◽  
Saponin Fraction ◽  
And Chemical Properties

The saponin fraction of black medic trefoil (<em>Medicago lupulina</em>) roots was isolated and purified. Its hydrolysis afforded several aglycones that have been identified by spectral and chemical properties as medicagenic acid, hederagenine and soyasapogenols: B, C, D, E and F. They made up, respectively. 46.9 and 45% of total sapogenins isolated. Two-dimensional TLC of <em>M. lupulina</em> root saponins revealed fourteen compounds, two of which were medicagenic acid glycosides. The haemolytic, antifungal and allelopathic activities of <em>M. lupulina</em> and <em>M. media</em> roots are compared and discussed.

scholarly journals Plant Flavonoids: Chemical Characteristics and Biological Activity

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5377
Author(s):  
Maria Celeste Dias ◽  
Diana C. G. A. Pinto ◽  
Artur M. S. Silva
Keyword(s):  
Biological Activity ◽  
Plant Stress ◽  
Antimicrobial Properties ◽  
Large Family ◽  
Basic Structure ◽  
Extraction Methods ◽  
Extraction Yield ◽  
Antioxidant Compounds ◽  
Chemical Characteristics ◽  
Natural Substances

In recent years, more attention has been paid to natural sources of antioxidants. Flavonoids are natural substances synthesized in several parts of plants that exhibit a high antioxidant capacity. They are a large family, presenting several classes based on their basic structure. Flavonoids have the ability to control the accumulation of reactive oxygen species (ROS) via scavenger ROS when they are formed. Therefore, these antioxidant compounds have an important role in plant stress tolerance and a high relevance in human health, mainly due to their anti-inflammatory and antimicrobial properties. In addition, flavonoids have several applications in the food industry as preservatives, pigments, and antioxidants, as well as in other industries such as cosmetics and pharmaceuticals. However, flavonoids application for industrial purposes implies extraction processes with high purity and quality. Several methodologies have been developed aimed at increasing flavonoid extraction yield and being environmentally friendly. This review presents the most abundant natural flavonoids, their structure and chemical characteristics, extraction methods, and biological activity.

scholarly journals Mycorrhizae and a soil ameliorant on improving the characteristics of sandy soil

2021 ◽  
Vol 18 (1) ◽  
pp. 73
Author(s):  
Aktavia Herawati ◽  
Jauhari Syamsiyah ◽  
Mujiyo Mujiyo ◽  
Mapan Rochmadtulloh ◽  
Afifah Afiana Susila ◽  
...  
Keyword(s):  
Biological Activity ◽  
Sandy Soil ◽  
Rock Phosphate ◽  
Exchange Capacity ◽  
Available P ◽  
Spore Density ◽  
Chemical Characteristics ◽  
Cow Dung ◽  
Root Infection ◽  
Soil Ameliorant

<p>Agricultural constraints on sandy soil are poor chemical characteristics and low biological activity resulting in the soil becoming less productive to be planted. One of the efforts to improve the quality of sandy soil are application of mycorrhizae and a soil ameliorant. The purpose of this study was to determine the effect of mycorrhizae and a soil ameliorant on soil chemical characteristics and soil biological activity. The experiment was arranged using a Complete Randomized Design that had two factors. The first factor (1) was mycorrhizae dose, without mycorrhizae (M0) and six spores of mycorrhizae/plant (M1), and the second factor (2) was types of soil ameliorant, without ameliorant (S0), cow dung (S1), rock phosphate (S2), biochar (S3), cow dung–rock phosphate (S4), cow dung–biochar (S5), and rock phosphate–biochar (S6). The results indicated that combination of six spores mycorrhizae/plant–cow dung 60 tons ha<sup>−1</sup>–biochar 25 tons ha<sup>−1</sup> (M1S5) increased soil organic carbon (SOC) (235%), available P (675%), cation exchange capacity (CEC) (216%), total glomalin (101%), and easily extracted glomalin (69%), decreased exchangeable sodium percentage (66%), and increased absolutely for root infection and spore density than without mycorrhizae and a soil ameliorant (control). The lowest of SOC in non-mycorrhizae and rock phosphate, available P, CEC, root infection, spore density were found on the control, but the lowest of total glomalin and easily extracted glomalin were found on non-mycorrhizae–rock phosphate. The application of mycorrhizae, cow dung, and biochar improved the sandy soil characteristics.</p>

scholarly journals Chemical characterization and pharmacological action of Brazilian red propolis

2018 ◽  
Vol 2 (1) ◽  
pp. 34 ◽  
Author(s):  
Marcela Lins Cavalcanti de Pontes ◽  
Inácio Ricardo Alves Vasconcelos ◽  
Margareth de Fátima Formiga De Melo Diniz ◽  
Hilzeth De Luna Freire Pessôa
Keyword(s):  
Biological Activity ◽  
Chemical Composition ◽  
Chemical Characterization ◽  
Pharmacological Action ◽  
Human Organism ◽  
Chemical Characteristics ◽  
Pharmacological Properties ◽  
Review Of The Literature ◽  
Exclusion Criteria ◽  
Brazilian Propolis

Among the natural products, Brazilian propolis stands out because it is considered a source for the discovery of new bioactive compounds. In the last decade, a new Brazilian propolis has been described, known as red propolis due to its reddish pigment. Since then, numerous studies revealing its major components and their pharmacological activity have been described. Thes, this research had the objective of performing an integrative review of the literature on the biological activity of Brazilian red propolis. Scientific studies in the PubMed, SciElo and LILACS database were reviewed and analyzed using an inductive approach and indirect documentation technique. A total 418 publications were found, and onclusion and exclusion criteria were subsequently applied, selecting a total of 18 articles. The Brazilian propolis presents numerous pharmacological properties, especially the antibacterial, antfugal, antoxidant and anti-inflammatory effects. In addition, the chemical composition of this substance is different from other types of propolis already reported in the literature, presenting flavonoids never before reported. In this way, its chemical characteristics suggest probable therapeutic use for the human organism.

Sign in / Sign up

Export Citation Format

Share Document