Consulta: subjectFacets:"Inorganic phosphorus"
Registros recuperados: 6
Data/hora: 12/06/2024 12:29:22

Потребление и время оборота неорганического фосфора в водах Черного моря в осенний период
Provedor de dados: 13
Autores: Пархоменко, А. В.; Кирикова, М. В.
Рассмотрены результаты исследования скорости потребления неорганического фосфора микропланктоном (Vp) и времени его оборота (Т) в водах Черного моря. У побережья Крыма и северо-западной части моря средние величины скорости (Vp) в верхнем перемешанном слое (ВПС) составили 61∙10-4, в глубоководной области моря - 88∙10-4 мкМ∙ч-1. Время оборота фосфатов в ВПС у побережья Крыма и глубоководной области моря изменялось от 0.26 до 0.8 сут, в северо-западной части увеличивалось до 1.5 сут, под ВПС 16 – 180 сут. В период осенней сукцессии фитопланктонного сообщества основную роль в потреблении фосфатов микропланктоном играла размерная фракция 0.4 – 20 мкм, её вклад составлял (97 %). На основании атомарного отношения скоростей потребления неорганических форм...
Tipo: Journal Contribution
Palavras-chave: Чёрное море; Неорганический фосфор; Скорость; Время оборота; Микропланктон; Black Sea; Inorganic phosphorus; Uptake; Rate; Microplankton.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/56

EFFECTS OF THREE FRACTIONS OBTAINED FROM Naja haje  VENOM ON HEMOLYSIS AND LIPID METABOLISM IN RABBITS
Provedor de dados: 79
Autores: EL-AAL,A. A.; EZZAT,A. R.
Three fractions (F1, F2 and F3) were obtained from the venom of the Egyptian cobra Naja haje by gel filtration. F1 and F2 had indirect hemolytic effects on rabbit erythrocytes. The HU50 (the amount of the fraction causing 50% hemolysis ) values of F1 and F2 were 12.04 ± 3.89 and 36.57 ± 2.20 µg, respectively. The effects of the three cobra venom fractions on lipid metabolism were studied after 1, 2, 3 and 4 hours. Serum total lipids and cholesterol were significantly decreased at almost all tested times, but variable changes were observed in the serum triglycerides. Serum inorganic phosphorus levels were significantly increased with F1 and F2 administration more than that with the F3 fraction. These results suggest that F1 and F2 possess phospholipase...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Naja haje venom fractions; Hemolysis; Total lipids; Cholesterol; Triglycerides; Inorganic phosphorus.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301997000200007

Chemical, Biological, and Biochemical Parameters of the Soil P Cycle After Long-Term Pig Slurry Application in No-Tillage System
Provedor de dados: 90
Autores: Tiecher,Tales; Tiecher,Tadeu Luis; Mallmann,Fábio Joel Kochem; Zafar,Mohsin; Ceretta,Carlos Alberto; Lourenzi,Cledimar Rogério; Brunetto,Gustavo; Gatiboni,Luciano Colpo; Santos,Danilo Rheinheimer dos.
ABSTRACT In Southern Brazil, agricultural soils are often treated over long periods with annual pig slurry (PS) applications, and their influence on soil nutrient dynamics should be monitored. This study aimed to evaluate the P forms accumulated in the soil and some biological and biochemical parameters of the P cycle after 19 successive PS applications over eight years, in a no-tillage (NT) system. Pig slurry was applied at rates of 0, 20, 40, and 80 m3 ha-1 per crop. Several P forms (available P, microbial P, phosphatase enzyme, total organic and inorganic P) in the 0.00-0.05 and 0.05-0.10 m soil layers were analyzed. Increases up to 5,523 % in available P, 308 % in microbial P, 104 % in phosphatase enzyme activity, 91 % in organic P, 251 % in inorganic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic phosphorus; Inorganic phosphorus; Microbial biomass phosphorus; Acid phosphatase.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100428

Forms of phosphorus in an oxisol under different soil tillage systems and cover plants in rotation with maize
Provedor de dados: 90
Autores: Carvalho,Arminda Moreira de; Bustamante,Mercedes Maria da Cunha; Almondes,Zayra Azeredo do Prado; Figueiredo,Cícero Célio de.
Phosphorus fractions play a key role in sustaining the productivity of acid-savanna Oxisols and are influenced by tillage practices. The aim of this study was to quantify different P forms in an Oxisol (Latossolo Vermelho-Amarelo) from the central savanna region of Brazil under management systems with cover crops in maize rotation. Three cover crops (Canavalia brasiliensis, Cajanus cajan (L.), and Raphanus sativus L.) were investigated in maize rotation systems. These cover crops were compared to spontaneous vegetation. The inorganic forms NaHCO3-iP and NaOH-iP represented more than half of the total P in the samples collected at the depth of 5-10 cm during the rainy season when the maize was grown. The concentration of inorganic P of greater availability...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic matter; Available phosphorus; Phosphorus sequential fractionation; Organic phosphorus; Inorganic phosphorus.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300029

Gas exchange and yield response to foliar phosphorus application in Phaseolus vulgaris L. under drought
Provedor de dados: 61
Autores: Santos,Mauro Guida dos; Ribeiro,Rafael Vasconcelos; Oliveira,Ricardo Ferraz de; Pimentel,Carlos.
This study was conducted to evaluate the effect of foliar Pi application on gas exchange and yield of bean genotypes submitted to a mild water deficit at the pre-flowering stage. In the first experiment, when extra Pi (10 g.L-1) was sprayed on leaves during water stress or during recovery, there was no effect on gas exchange or yield in the A320, Carioca and Ouro Negro genotypes. However, net CO2 assimilation (A) of A320 and Ouro Negro was less affected, but not significantly, than Carioca at the end of the stress, when Pi was supplied five days before water deficit. In the second experiment, two different doses of Pi (10 and 20 g.Pi L-1) were sprayed five days before water deficit on the Carioca genotype. During the last three days of the mild water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Common bean; Inorganic phosphorus; Photosynthesis; Water deficit.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000300007

Seed phytate content and phosphorus uptake and distribution in dry bean genotypes
Provedor de dados: 61
Autores: Coelho,Cileide Maria Medeiros; Santos,Júlio Cesar Pires; Tsai,Siu Mui; Vitorello,Victor Alexandre.
Phytic acid is the major storage form of phosphorus in seeds of legumes and cereals. Since phytate can form complexes with proteins and minerals, reducing the digestive availability of these nutrients, it is usually regarded as an antinutrient, although recent work indicates that it has important beneficial roles as an antioxidant and anticarcinogen. Therefore, there is an interest in the assessment and manipulation of phytate contents in important food grains such as beans. The objective of this work was to compare eleven dry bean genotypes with regard to grain contents of P, phytate, inorganic P and protein and to examine if differences between genotypes could be explained by differences in grain protein content or in uptake and partitioning of P. Plants...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Inorganic phosphorus; Phaseolus; Phytic acid; Protein.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000100007