Influence of Soil Parent Materials and Soil-Related Factors on the Growth and Yield of Rubber Under Felcra Scheme, Sendayan

The influence of two terrain classes (i.e. 5 to 25% and 25 to 50% slopes) on soils developed from two parent materials (i.e. granite and sedimentary rocks) on the growth and yield of rubber (Hevea brasiliensis) after four years of tapping was evaluated by using the field data, viz. girth and yield of rubber from 1980 to 1983, obtained from the Federal Land consolidation and Rehabilitation Authority (FELCRA) Scheme at Sendayan, Negri Sembilan. RUbber grown on sedimentary rock derived soil on steep slopes (25 to 50% slope) after four years of tapping showed significantly bigger girth than those grown on same soil on undulating to rolling terrain (5 to 25% slope). The mean monthly and yearly dry weight of rubber after four years of tapping was significantly higher in areas planted on sedimentary rock derived soils located on steep terrain. The growth of rubber as influenced by the interaction of parent material and slope over time was not significant during the same period of tapping. However3 the overall yield of rubber was significantly higher on soils derived from sedimentary rocks on steep terrain than on soils derived from granite on similar terrain

Mineralogical and Chemical Properties of Some Acid Sulfate Soils in Malaysia and Their Effects on the Growth Performance of Oil Palm Seedlings (Elaeis Ruineensis, Jacq)

Acid sulfate soils are charllcterized by a very low pH and a high aluminium concentration resulting from the chemical and biological oxidation of pyrite upon drainage. These soils have low agricultural potential due to high acidity and poor physical conditions, which adversely affect crop growth. Successful reclamation and management of acid sulfate soils would require an in-depth understanding of the soil's chemical and mineralogical properties. In this study, acid sulfate soils at Pulau Lumut, Kelang were mapped, characterized morphologically and chemically,and classified. Soil solutions were extracted on samples from soil pit,limed and oxidized soils and a pot experiment at the matrix suction of 10 kPa and the activities of the major cations and anions were calculated by Geochem. XRD and TGA were carried out to deter mine the mineralogy of the various soil horizons. The morphological features of the minerals in the soils were studied by TEM and SEM. A controlled pot experiment was conducted to assess the performance of oil palm seedlings grown on acid sulfate soils under freely drained and waterlogged conditions

Laboratory Studies on the Release of Cations and Anions in Acid Sulfate Soils from Pulau Lumut,Selangor

Acid sulfate soils in Peninsular Malaysia are characterized l7y low pH and high amounts of At. Alleviation of toxic ions in the soils l7y controlled drainage is recommended. However, potential acidity remains in the soils due to slow release of toxic ions during mineral weathering. A study was conducted to determine the release of Al and other ions l7y repetitive extraction of samples from the field and l7y aerobic incubation of samples in the laboratory. The results showed that Al was released continuously from the soils even after the sixth extraction. When the soils were allowed to undergo free oxidation under aerobic conditions Al, Mn, Fe, Ca, Mg, K, Na and S were released into the soil solutions due to breakdown of clay minerals. Activities of these ions increased significantly, resulting in an increase of electrical conductivity of the soil solution. Additionally, pH of the soil solution dropped. These commonly observed properties of acid sulfate soils have great implications on their management practices

Dosing oral-liquid azithromycin suspensions: do users follow instructions?

Abstract in proceedings of the Fourth International Congress of CiiEM: Health, Well-Being and Ageing in the 21st Century, held at Egas Moniz’ University Campus in Monte de Caparica, Almada, from 3–5 June 2019.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.info:eu-repo/semantics/publishedVersio

Drug-Induced photosensitivity

Drug-induced photosensitivity is an abnormal skin reaction in individuals exposed to radiation and certain drugs. A literature review was carried out through a database search such as Pubmed, Cochrane Library and Science Direct, in order to identify drugs that cause photosensitivity reactions and acknowledge the role of the pharmacist in the management and prevention of such reactions. Articles dated until 2020 were included both written in English, Portuguese and Spanish. The prevalence of photosensitivity reactions depends on factors such as the geographical area and prescription and use habits. Various drug classes, namely NSAIDs (ketoprofen and piroxicam), Antifungals, Antibiotics (tetracyclines, fluoroquinolones), Antihypertensive, Statins, Antiarrhythmics (amiodarone), Retinoids e Chemotherapeutics (vemurafenib), are among the most frequently associated with the induction of photosensitivity reactions. Chronic exposure to these drugs may be associated with na increased risk of photocarcinogenesis. A wide range of drugs, including the ones not subject to medical prescription, may induce photosensitivity, meaning that additional photo-protection precautions must be applied to the patient. The role of the pharmacist plays an important part in the medical counselling, prevention and management of eventual cutaneous reactions associated to those therapeutics.info:eu-repo/semantics/publishedVersio

Alumínio extraível e formas de AL na solução de solos derivados de rocha granitica em Portugal

Extractable aluminium (Al) was determined in surface and subsurface horizons of eleven pedons derived from granite occurring in Portugal, under a wide range of precipitation. Five successive extractions with 1 M KCl, 0.5 M CuCl2 and 0.33 M LaCl3 were used. Monomeric (Alm) and organic (Alorg) forms of Al in the soil solution, extracted at field capacity, were also determined. Amounts of extracted Al were greatest with the 0.5 M CuCl2 and lowest with the 1 M KCl. These amounts showed strong positive correlation with soil organic C contents. Soil horizons having high contents (56-80 g kg-1) of organic C showed the highest amount of extractable Al by the 0.5 M CuCl2 (12.2-30.9 cmolc kg-1). Organically bound Al extracted by the 0.5 M CuCl2 and 0.33 M LaCl3 was also highest in these soils (7.6-10.1 and 4.7-8.3 cmolc kg-1, respectively). In contrast, lowest amounts of Al extracted by the 1 M KCl, 0.5 M CuCl2 and 0.33 M LaCl3 (0.9-4.3, 4.1-17.1 and 2.2-7.2 cmolc kg-1, respectively) were observed in horizons containing low organic C content (3-22 g kg-1). Concentrations of total (AlT), monomeric (Alm) and organic (Alorg) Al in the soil solution of studied soils also increased with increasing soil organic C content, but only Alm was significantly correlated with soil organic C content. Solution of soils having low organic C contents (3-6 g kg-1) showed the lowest concentrations of AlT, Alm and Alorg (0.09-1.60, 0.06-0.38 and 0.03-1.29 μg mL-1, respectively). In contrast, the concentrations of AlT (7.1-17.2 μg mL-1), Alm (0.8-0.9 μg mL-1), and Alorg (7.6-16.9 μg mL-1) were much higher in soils containing high amounts of organic C (37-73 g kg-1). In order to monitor the effects of Al in the soil and quality of sub-superficial water, changes in the concentration of monomeric forms of Al and their activities in the soil solution need further stud

Extractability of P in major soils of Angola as affected by P fertilizers and lime application

Phosphorus (P) deficiency is the major constraint to crop production in most tropical soils (Sahrawat et al., 2001). In Angola, such constraint (i.e, low concentration and low P solubility) has also been reported to limit crop production in many agricultural soils (Ucuassapi, 2006). These soils may require application of inorganic P through soluble and relatively reactive phosphate rock sources, and lime (Dobermann et al., 2002; Murphy, 2007). However, appropriate P management strategies may require information on the fate of applied P and its interaction with the colloidal constituents. Therefore, information on the different P fractions (inorganic and organic) after the application of different rates of P fertilizers and lime, as fractionated sequentially by the Hedley modified procedure (Tiessen and Moir, 1993) is crucial for making appropriate fertilizer and lime rate recommendations for crops (Islam et al., 2010)

An overview of vitamin B in food supplements

Poster apresentado no 4.º Congresso Internacional de Saúde do IP Leiria - “Tendências Globais em Saúde.” 11-12 Maio 2018, LeiriaN/

Alcohol-antibacterial drug interactions: comparison of three drug compendia

Poster presented at the 44th ESCP Symposium on Clinical Pharmacy. Lisbon, 28-30 October 201

Vitamin D in liquid food supplements: are labels in line with RDA?

Abstract in proceedings of the Fourth International Congress of CiiEM: Health, Well-Being and Ageing in the 21st Century, held at Egas Moniz’ University Campus in Monte de Caparica, Almada, from 3–5 June 2019.This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.info:eu-repo/semantics/publishedVersio