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 Pengaruh Rhizobium dan Urin Manusia terhadap Perubahan Sifat Biologi dan Kimia Tanah di Rezosfer Kedelai pada Inceptisol

2018 ◽  
Vol 3 (3) ◽  
pp. 234-242
Author(s):  
Santri Ifky Arwani Pakpahan ◽  
Ilyas Ilyas ◽  
Fikrinda Fikrinda
Keyword(s):  
Soil Respiration ◽  
Human Urine ◽  
Block Design ◽  
Organic N ◽  
Soil Productivity ◽  
Chemical Characteristics ◽  
Alternative Technology ◽  
Rhizobium Inoculation ◽  
Randomized Block Design ◽  
Two Factors

Abstrak.  Aplikasi rhizobium dan urin manusia merupakan teknologi alternatif untuk meningkatkan produktivitas tanah. Inceptisol yang memiliki kendala ketersediaan hara  nitrogen (N), fosfor (P) dan kalium (K). Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) yang terdiri atas dua faktor (rhizobium dan urin manusia) dengan pola 2 x 4 dan tiga kali ulangan. Hasil penelitian ini menunjukkan  bahawa interaksi  rhizobium dan urin manusia berpengaruh sangat nyata terhadap respirasi tanah dan nyata terhadap total mikroorganisme. Inokulasi rhizobium berpengaruh sangat  nyata terhadap respirasi tanah dan nyata terhadap K-tersedia namun tidak nyata terhadap parameter total mikroorganisme, pH, C-organik, N-total dan P-tersedia. Perlakuan urin manusia berpengaruh sangat nyata terhadap respirasi tanah dan  nyata terhadap total mikroorganisme dan pH, namun tidak nyata terhadap C-organik, N-total, K-tersedia dan P-tersedia.. Perlakuan terbaik yaitu tanpa inokulasi dan pemberian 25 mL urin manusia.Effects of Rhizobium and Human Urine on Soil Biological and Chemical Characteristics of Soybean Rezosphere at  InceptisolAbstract. The application of rhizobium and human urine is an alternative technology to increase soil productivity. Inceptisol which has constraints on the availability of nitrogen (N), phosphorus (P) and potassium (K). This study used Randomized Block Design consisting of two factors (rhizobium and human urine) with 2 x 4 pattern and three replications. The results of this study indicate that the interaction of rhizobium and human urine has a very significant effect on soil respiration and real to total microorganisms. Rhizobium inoculation had a very significant effect on soil respiration and was apparent to K-available but not significant on the total parameters of microorganisms, pH, C-organic, N-total and P-available. Aplication of Human urine had a very significant effect on soil respiration and was apparent to total microorganisms and pH, but not significant for C-organic, N-total, K-available and P-available. The best aplication was without inoculation and 25 mL of human urine. 

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 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

scholarly journals The effect of spruce stand thinning on biological activity in soil

2012 ◽  
Vol 49 (No. 11) ◽  
pp. 523-530 ◽  
Author(s):  
P. Formánek ◽  
V. Vránová
Keyword(s):  
Biological Activity ◽  
Soil Respiration ◽  
Biological Activities ◽  
Ammonium Nitrogen ◽  
Mountainous Area ◽  
Cellulose Decomposition ◽  
Spruce Stands ◽  
Biological Tests ◽  
Stand Thinning ◽  
The Individual

The effect of thinning of young spruce stands by 500 trees/ha on biological activity in the soil profile was studied in the mountainous area of the Moravian-Silesian Beskids. The biological activity of soil was determined under optimal laboratory conditions by tests of soil respiration, catalase activity and intensity of cellulose decomposition. No statistically significant differences were found between the individual biological tests when the two experimental stands were compared (P-level 0.05). All biological activities within each stand were correlated, and significant correlations were found between biological activities in the soil and ammonium nitrogen content.

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.

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