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Search Results: 1 - 10 of 71362 matches for " LILY MARIA GORETTI PANGGABEAN "
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Growth and Extracellular Carbonic Anhydrase Activity of Zooxanthellae Symbiodinium sp. in Response of Zinc Enrichment
HAYATI Journal of Biosciences , 2011,
Abstract: Coral reef communities contain a wide variety of mutualistic associations none more important than the relationship between corals and their symbiotic dinoflagellates of the genus Symbiodinium sp., commonly referred to as zooxanthellae. The function of Zinc (Zn) as cofactor of several enzyme systems such as extracellular carbonic anhydrase (extracellular CA) which catalyzes the interconversion of HCO3- and CO2. Concentrations of dissolved Zn in oligothropic waters are often very low therefore may limit the growth of zooxanthellae and their ability to fix CO2 from seawater via the carbonic anhydrase. The aim of this research is to investigate the effect of various concentrations of Zn on the growth and extracellular CA activity in zooxanthellae. Cell density was monitored daily by enumeration with hemocytometer-type chamber (0.1 mm). Extracellular CA was measured in homogenized intact whole cell by a pH drift assay. Results revealed that Zn status strongly influences the growth rate and extracelullar CA activity in zooxanthellae. The specific growth rate and cell density increased two-fold whilst extracelullar CA activity increased 10.5 times higher than that in control with increasing concentrations of Zn from 0 to 80 nM, but decreased when Zn was over 80 nM. Under a concentration of 80 nM was not Zn limited culture, consequently the growth rate of zooxanthellae not dependent on CO2 concentration yet offset by extracelullar CA activity.
Fatty Acid Synthesis by Indonesian Marine Diatom, Chaetoceros gracilis
HAYATI Journal of Biosciences , 2009,
Abstract: Since the primary storage nutrients in diatoms consist of lipid, they are potential for the industrial fatty acid production. High value fatty acids include arachidonic acid, eicosapentaenoic acid and docosahexaenoic acid. This study aimed to analyze fatty acid synthesis by Chaetoceros gracilis diatom during growth. There was a large increase in lipid yield from 4pg cell-1 mass of lipid per cell at the exponential phase to 283pg cell-1 at stationary phase. The lipid concentrations also increased significantly from the stationary phase to the death phase, but not significantly from the end exponential phase to the stationary phase. The relative percentage of saturated fatty acid (SAFA) of the total fatty acid was higher than that of monounsaturated fatty acid (MUFA) and polyunsaturated fatty acid (PUFA) at all of growth phase. The highest PUFA was found at stationary phase at the same time when SAFA was being the lowest. The majority of SAFA was palmitic acid (24.03-40.35%). MUFA contained significant proportion of oleic acid (19.6-20.9%). Oleic acid, linoleic acid and α-linolenic acid were found at every stage growth. These fatty acids are considered as precursor for production of long chain PUFA-Docosahexaenoic acid (DHA/22:6ω3) through series of desaturation and elongation step with all of desaturase enzyme (Δ8-D, Δ9-D, Δ12-D, Δ15-D, Δ17-D, Δ6-D, Δ5-D, and Δ4-D) and elongase enzyme (E).
2008: um ano de êxito para a Enfermagem Brasileira 2008: un a o de éxito para la Enfermería Brasile a 2008: a sucessfull year for the Brazilian Nursing
Maria Goretti David Lopes
Revista Brasileira de Enfermagem , 2008, DOI: 10.1590/s0034-71672008000600001
Desafio para a Enfermagem brasileira: criar uma alian a nacional entre suas organiza es Desafío para la Enfermería brasilera: la creación de una alianza nacional entre sus organizaciones Challenge for the Brazilian Nursing: creating a national alliance between their organizations
Maria Goretti David Lopes
Revista Brasileira de Enfermagem , 2010, DOI: 10.1590/s0034-71672010000600001
Contribui o da ABEn para a visibilidade e reconhecimento profissional Contribución de la ABEn para la visibilidad y reconocimiento profesional ABEn's contribution for professional visibility and recognition
Maria Goretti David Lopes
Revista Brasileira de Enfermagem , 2010, DOI: 10.1590/s0034-71672010000400001
A ABEn fortalecendo la os e construindo o futuro ABEn fortaleciendo los lazos y construiendo el futuro ABEn strengthening the chains and buiding the future
Maria Goretti David Lopes
Revista Brasileira de Enfermagem , 2008, DOI: 10.1590/s0034-71672008000100001
Elei es na ABEn Elecciones en la ABEn Elections in ABEn
Maria Goretti David Lopes
Revista Brasileira de Enfermagem , 2010, DOI: 10.1590/s0034-71672010000100001
A coragem de fazer a diferen a El coraje de hacer la diferencia The courage of making the difference
Maria Goretti David Lopes
Revista Brasileira de Enfermagem , 2008,
Himpun Panggabean
K@ta : a Biannual Publication on the Study of Language and Literature , 2007,
Abstract: The misleading assumptions of Indonesian-speaking learners of English on the nature of English results in psychological burden inhibiting the process of teaching and learning. The assumptions should be eliminated at the beginning of English class. Besides, the instructor should extensively motivate and encourage the learners to maximize their potentials in learning process. Such approach will gradually lead the learners to self-confidence and self-discovery.
Microangiopatias trombóticas: púrpura trombocitopênica trombótica e síndrome hemolítico-urêmica
Polito, Maria Goretti;Kirsztajn, Gianna Mastroianni;
Jornal Brasileiro de Nefrologia , 2010, DOI: 10.1590/S0101-28002010000300013
Abstract: thrombotic microangiopathies (tmas) are pathological conditions characterized by generalized microvascular occlusion by platelet thrombi, thrombocytopenia, and microangiopathic hemolytic anemia. two typical phenotypes of tmas are hemolytic- uremic syndrome (hus) and thrombotic thrombocytopenic purpura (ttp). other disorders occasionally present with similar manifestations. depending on whether renal or brain lesions prevail, two pathologically indistinguishable but somehow clinically different disorders have been described: hus and ttp. injury to the endothelial cell is the central and likely inciting factor in the sequence of events leading to tma. loss of physiological thromboresistance, leukocyte adhesion to damaged endothelium, complement consumption, abnormal von willebrand factor release and fragmentation, and increased vascular shear stress may then sustain and amplify the microangiopathic process. intrinsic abnormalities of the complement system and of the von willebrand factor pathway may account for a genetic predisposition to the disease that may play a paramount role in particular in familial and recurrent forms. in the case of diarrhea-associated hus (d+hus), renal endothelial damage is mediated (at least in large part) by the bacterial agent shigatoxin (stx), which is actually a family of toxins elaborated by certain strains of escherichia coli and shigella dysenteriae. outcome is usually good in childhood, shiga toxin-associated hus, whereas renal and neurological sequelae are more frequently reported in adult, atypical, and familial forms of hus and in ttp. recent studies have demonstrated that deficiency in the von willebrand factor cleaving protease adamts13, due to deficiency of adamts13 can be genetic or more common, acquired, resulting from autoimmune production of inhibitory anti-adamts13 antibodies, that causes ttp. during the last decade, atypical hus (ahus) has been demonstrated to be a disorder of the complement alternative pathway dysregul
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