scholarly journals Analysis of the biological spectrum of vascular flora of Ravni Srem flood forests

2011 ◽  
pp. 57-70
Author(s):  
Branislav Jurisic ◽  
Dragica Obratov-Petkovic ◽  
Ivana Bjedov ◽  
Nenad Bojat ◽  
Vladimir Stevanovic
Keyword(s):  
Functional Response ◽  
Environmental Effects ◽  
Life Form ◽  
Study Region ◽  
Vascular Flora ◽  
Floristic Study ◽  
Species Evolution ◽  
Basic Characteristics ◽  
Biological Spectrum

One of the essential analyses performed during the floristic study of a region is the analysis of the biological spectrum. The analysis of the biological spectrum of the flora includes the determination of the type of life form for each taxon described in the flora of the study region. If it is considered that life form is a specific structural-functional response to the environmental effects and the result of the adaptation during the species evolution, it is clear that the basic characteristics of the site are more or less reflected in any life form. This fact is confirmed by the analysis of the biological spectrum of the flora of Ravni Srem. The analysis of the Ravni Srem flora shows the domination of the hemicryptophytes and the subdomination of the phanerophytes with a considerable participation of the therophytes.

scholarly journals Analysis of biological spectrum of Divcibare flora

2006 ◽  
pp. 143-154
Author(s):  
Ivana Popovic ◽  
Dragica Obratov-Petkovic
Keyword(s):  
Environmental Effects ◽  
Life Form ◽  
Balkan Peninsula ◽  
Study Region ◽  
Floristic Study ◽  
Study Results ◽  
Species Evolution ◽  
Basic Characteristics ◽  
Biological Spectrum

One of the essential analyses which is performed during the floristic study of a region is the analysis of the biological spectrum. The analysis of the biological spectrum of the flora includes the determination of the type of life form for each taxon described in the flora of the study region. If it is considered that life form is a specific structural-functional response to the environmental effects and the result of the adaptation during the species evolution, it is clear that the basic characteristics of the site are more or less reflected in any life form. This fact is confirmed by the analysis of the biological spectrum of Divcibare flora. The study results are in correlation with the results of the analysis of the biological spectrum of the flora of Serbia and the Balkan Peninsula.

Faunistic inventory and zoogeographical analysis of the ground beetles (Coleoptera, Carabidae) of Garf Raydah Nature Reserve, Southwestern of Saudi Arabia, and description of a new species of Paussinae

Zootaxa ◽  
2018 ◽  
Vol 4514 (3) ◽  
pp. 341 ◽  
Author(s):  
MAHMOUD S. ABDEL-DAYEM ◽  
IFTEKHAR RASOOL ◽  
ALI A. ELGHARBAWY ◽  
PETER NAGEL ◽  
HATHAL M. ALDHAFER
Keyword(s):  
Saudi Arabia ◽  
Life Form ◽  
Nature Reserve ◽  
Arabian Peninsula ◽  
New Records ◽  
Ground Beetles ◽  
Kingdom Of Saudi Arabia ◽  
Form Analysis ◽  
A New Species

Study of ground beetles of the Garf Raydah Nature Reserve, located in the Asir Mountains of southwestern Kingdom of Saudi Arabia (KSA) resulted in one species, Paussus abditus Nagel, sp. n. described as new to science. Thirteen species (21.3%) are reported as new country records and fifteen species (24.6%) are new records for Asir Province. Adult beetles were collected from 2013 to 2017. The determination of this material yielded a total of 61 species in 40 genera and 17 tribes belonging to nine subfamilies of Carabidae. The species richness represented approximately 36.1% of carabid species previously reported from KSA. The most species rich tribes were the Lebiini (20 species), the Harpalini (10 species), and the Bembidiini (6 species). The life form analysis of adults indicated 18 life form types that are grouped into three categories, Zoophagous (77.1%), Mixophytophagous (18.0%), and Myrmecophilous (4.9%). Zoogeographical analyses indicated that the Afrotropical (19.3%) and the Saharo-Arabian (19.3%) species dominate the carabid fauna of this region of KSA. Coryza cf. maculata (Nietner, 1856) is considered the only Oriental representative. Only one cosmopolitan species, Perigona nigriceps (Dejean, 1831), was collected. Eleven endemics were identified; six species are considered KSA endemics and five are Arabian Peninsula endemics. 

Periventricular Intraparenchymal Echodensities in the Premature Newborn: Critical Determinant of Neurologic Outcome

PEDIATRICS ◽  
1986 ◽  
Vol 78 (6) ◽  
pp. 995-1006
Author(s):  
Franco Guzzetta ◽  
Gary D. Shackelford ◽  
Sara Volpe ◽  
Jeffrey M. Perlman ◽  
Joseph J. Volpe
Keyword(s):  
Cognitive Function ◽  
Mortality Rate ◽  
Cognitive Outcome ◽  
Motor Deficits ◽  
Critical Determinant ◽  
Acute Period ◽  
Hemorrhagic Necrosis ◽  
Neurologic Disability ◽  
Basic Characteristics

Controversy exists concerning the degree of importance of periventricular intraparenchymal echodensities (IPE) observed on neonatal ultrasound scans in the determination of subsequent neurologic disability in premature infants. In this report, IPE was studied in 75 infants weighing less than 2,000 g at birth to determine the basic characteristics of the lesion, the likely pathogenesis, the outcome, and the aspects of the ultrasonographic appearance in the acute period of neonatal illness that are important for prediction of outcome. IPE was defined as any periventricular echodensity greater than 1 cm in at least one dimension. IPE was strikingly associated with large areas of intraventricular hemorrhage (IVH) (81% of cases). IPE was distinctly asymmetric. Thus, the lesion was either exclusively unilateral (67%) or bilateral with marked predominance on one side. The associated IVH was asymmetric in approximately 80% of cases, and in all 50 cases of large asymmetric IVH, IPE occurred on the same side as the larger amount of intraventricular blood. Moreover, more than 50% of such cases of IPE associated with large asymmetric IVH were progressive. Neuropathologic correlation showed that IPE represented hemorrhagic necrosis of periventricular tissue. Concerning pathogenesis, these data raise the possibility that large asymmetric IVH is related etiologically to IPE. Outcome varied with the severity of the IPE. Thus, the mortality rate among the 38 infants with extensive IPE was 79%. Of the survivors with extensive IPE, all had subsequent major motor deficits and all but one exhibited cognitive function less than 80% of normal. Among the 37 infants with localized IPE, the mortality rate was 38%. Of the survivors, although 79% had major motor deficits, 43% had cognitive function greater than 80% of normal. Thus, the findings demonstrate that with extensive IPE there is little or no chance for survival with normal neurologic and cognitive outcome, but with localized IPE, although major motor deficits are common, an appreciable proportion of infants have cognitive function in the normal range. Careful, quantitative assessment of the ultrasonographic features of IPE in the acute period of illness in the premature infant is of major value in estimating outcome.

scholarly journals Field Determination of the Specific Input Characteristics to Calculate the Value of C Factor of Time-variable Crops for the Revised Universal Soil Loss Equation (RUSLE)

2013 ◽  
Vol 1 (No. 1) ◽  
pp. 10-15 ◽  
Author(s):  
Jakubíková Alena ◽  
Tippl Miloslav Janeček and Martin
Keyword(s):  
Soil Loss ◽  
Canopy Cover ◽  
Agricultural Crops ◽  
Growth Phases ◽  
Specific Input ◽  
Rain Drops ◽  
Basic Characteristics ◽  
Runoff And Soil Loss ◽  
Fall Height

To determine specific characteristics necessary for the computation of the C factor in RUSLE for timevariable crops, measurements were carried out in fields with selected agricultural crops grown by conventional practices. Sloping plots on an experimental area in Třebsin locality and farm fields were used to measure surface runoff and soil loss by erosion in conditions of natural and simulated rainfall. Basic characteristics to compute the C factor were determined in the particular growth phases of selected crops – sunflower, flax, poppy and rape. Effective root mass, canopy cover and fall height of rain drops were measured.

scholarly journals Attribution of high resolution streamflow trends in Western Austria – an approach based on climate and discharge station data

2015 ◽  
Vol 19 (3) ◽  
pp. 1225-1245 ◽  
Author(s):  
C. Kormann ◽  
T. Francke ◽  
M. Renner ◽  
A. Bronstert
Keyword(s):  
Freezing Point ◽  
Snow Accumulation ◽  
Lower Altitude ◽  
Study Region ◽  
Daily Streamflow ◽  
Streamflow Data ◽  
The One ◽  
Streamflow Trend ◽  
Streamflow Trends

Abstract. The results of streamflow trend studies are often characterized by mostly insignificant trends and inexplicable spatial patterns. In our study region, Western Austria, this applies especially for trends of annually averaged runoff. However, analysing the altitudinal aspect, we found that there is a trend gradient from higher-altitude to lower-altitude stations, i.e. a pattern of mostly positive annual trends at higher stations and negative ones at lower stations. At mid-altitudes, the trends are mostly insignificant. Here we hypothesize that the streamflow trends are caused by the following two main processes: on the one hand, melting glaciers produce excess runoff at higher-altitude watersheds. On the other hand, rising temperatures potentially alter hydrological conditions in terms of less snowfall, higher infiltration, enhanced evapotranspiration, etc., which in turn results in decreasing streamflow trends at lower-altitude watersheds. However, these patterns are masked at mid-altitudes because the resulting positive and negative trends balance each other. To support these hypotheses, we attempted to attribute the detected trends to specific causes. For this purpose, we analysed trends of filtered daily streamflow data, as the causes for these changes might be restricted to a smaller temporal scale than the annual one. This allowed for the explicit determination of the exact days of year (DOYs) when certain streamflow trends emerge, which were then linked with the corresponding DOYs of the trends and characteristic dates of other observed variables, e.g. the average DOY when temperature crosses the freezing point in spring. Based on these analyses, an empirical statistical model was derived that was able to simulate daily streamflow trends sufficiently well. Analyses of subdaily streamflow changes provided additional insights. Finally, the present study supports many modelling approaches in the literature which found out that the main drivers of alpine streamflow changes are increased glacial melt, earlier snowmelt and lower snow accumulation in wintertime.

Fish pepsin: basic characteristics, extraction, determination and biotechnological applications

2015 ◽  
Vol 4 (1) ◽  
pp. 6-14
Author(s):  
Vagne De Melo Oliveira ◽  
Ranilson De Souza Bezerra ◽  
Caio Rodrigo Dias Assis
Keyword(s):  
Food Production ◽  
Specific Substrate ◽  
Acidic Ph ◽  
Purification Process ◽  
Biotechnological Applications ◽  
Basic Characteristics ◽  
Fish Viscera ◽  
Enzyme Targeting ◽  
Optimal Ph

Enzyme technology has been employed in various segments of the industry, food production and consumer goods. Fish viscera are potential sources of proteins with enzymatic properties appreciable in this market. Among them, pepsin (EC 3.4.23.x) deserves special attention. The active enzyme has at least five isoforms which are precursor groups of pepsins type: A, B, and F, gastricsin and chymosin. Their zymogen (pepsinogen) is activated by autocatalysis at acidic pH in stomach. Hemoglobin is their specific substrate. Features like optimal pH and temperature vary according to species and even within the same species may be found different values. The molecular weight also varies according to species and is generally between 25 and 35 kDa. The protocols for extraction and determination of pepsin fish follow a line of standardization, varying concentrations of analysis. These data are basic steps to detect the presence of the enzyme targeting a future purification process for its effective biotechnological applications.

Sign in / Sign up

Export Citation Format

Share Document