OALib Journal期刊

ISSN: 2333-9721

費用:99美元

投稿

時間不限

2020 ( 111 )

2019 ( 235 )

2018 ( 250 )

2017 ( 253 )

自定義范圍…

匹配條件: “Marta; Valdebenito B” ,找到相關結果約151726條。
列表顯示的所有文章,均可免費獲取
第1頁/共151726條
每頁顯示
NITROGEN LEACHING LOSSES ON A VOLCANIC ASH SOIL AS AFFECTED BY THE SOURCE OF FERTILISER
Alfaro V,Marta; Salazar S,Francisco; Endress B,Denisse; Dumont L,Juan C; Valdebenito B,Aldo;
Revista de la ciencia del suelo y nutrición vegetal , 2006, DOI: 10.4067/S0718-27912006000200005
Abstract: an intact lysimeters study was carried out to measure the potential nitrogen (n) losses on an andisoil of southern chile with different fertilisers. the treatments tested were: fish slurry (fs), dairy slurry (ds), potassium nitrate (if) and a control treatment (c), with no n addition. an equivalent amount of 150 kg of total n ha-1 was applied to each lysimeter and then the equivalent to 1260 mm of rainfall was irrigated over a 90 days period. leachate samples were analysed for nitrate, nitrite, ammonia and organic n (no). total n losses were calculated as the product between drainage and the respective n concentration in the leachates. lowest n losses were obtained in the control and fs treatments (66 kg n ha-1) and the greatest amount was obtained in the if treatment (261 kg n ha-1). nitrogen was mainly lost as nitrate and no (each was 49% of the total n losses). high soil organic matter of andisoils can be more relevant than fertiliser for n leaching losses.
Efecto de Diferente Dosis de Lodo de la Crianza de Salmones en el Cultivo de Papa y su Efecto Residual en Ballica Anual
Teuber K,Nolberto; Salazar S,Francisco; Alfaro V,Marta; Valdebenito B,Aldo;
Agricultura Técnica , 2007, DOI: 10.4067/S0365-28072007000400007
Abstract: intensive salmon farming generates organic residues which have a potential use in agricultural soils. the objective of this study was to evaluate the effect of three salmon sludge rates on potato (solanum tuberosum) crop development and its residual effect on annual ryegrass (lolium multiflorum). the field experiment was carried out on an andisoil from osorno serie (hapludands), located in osorno (40o35?s, 73o08?w), chile. treatment were three salmon sludge rates (50, 100, 200 t ha-1), a control (no fertilizer), and an inorganic fertilizer treatment. the salmon sludge was incorporated into the soil and then potato tubers cv. yagana-inia were planted. after the harvest, an annual ryegrass was seeded. total potato yield with inorganic fertilizer was 64.3 t ha-1, significantly superior to the results with the salmon sludge rates and the control (p ≤ 0.05). there were no differences (p > 0.05) among the fish sludge rates (45.6 to 47.5 t ha-1) and the control treatment (39.4 t ha-1). in addition, there were no differences (p > 0.05) on tuber weight, but the number of tubers per plant was different (p ≤ 0.05). annual ryegrass yield was significantly different (p ≤ 0.05) between fertilizer treatments and the control. salmon sludge did not affect potato or ryegrass yield or development and increased p olsen and cation exchange capacity in the soil.
Efecto de Diferente Dosis de Lodo de la Crianza de Salmones en el Cultivo de Papa y su Efecto Residual en Ballica Anual Effect of Different Rates of Cage Salmon Sludge on Potato Crop and its Residual Effect on Annual Ryegrass
Nolberto Teuber K,Francisco Salazar S,Marta Alfaro V,Aldo Valdebenito B
Agricultura Técnica , 2007,
Abstract: La producción intensiva de salmones genera residuos orgánicos que tienen un uso potencial en suelos agrícolas, existiendo escasa información publicada de su utilización. El objetivo del presente estudio fue evaluar el efecto de tres dosis de lodo de salmón en el desarrollo del cultivo de papa (Solanum tuberosum) y su efecto residual en ballica anual (Lolium multiflorum). El ensayo se estableció en un suelo Andisol de la serie Osorno (Typic Hapludands), ubicado en Osorno (40o35’S, 73o08’O), Chile. Los tratamientos fueron tres dosis de lodo (50, 100 y 200 t ha-1), un control (sin fertilización orgánica e inorgánica) y un tratamiento de fertilización inorgánica. El lodo se incorporó al suelo, posteriormente se plantó papa cv. Yagana-INIA y después de la cosecha se sembró ballica anual cv. Sabalan. El rendimiento de papa con fertilización inorgánica fue 64,3 t ha-1, superior a los resultados obtenidos con las dosis de lodo y el control (P ≤ 0,05). No hubo diferencias estadísticas (P > 0,05) entre las distintas dosis de lodo evaluadas (45,6 a 47,5 t ha-1) y tampoco con el control (39,4 t ha-1). No se observaron diferencias (P > 0,05) en el peso por tubérculo, pero el número de tubérculos por planta fue diferente (P ≤ 0,05). El rendimiento de ballica anual fue significativamente diferente (P ≤ 0,05) en los tratamientos fertilizados comparados con el control. El lodo no afectó la emergencia ni el desarrollo de los cultivos, pero incrementó el contenido de P Olsen y la suma de bases de intercambio en el suelo. Intensive salmon farming generates organic residues which have a potential use in agricultural soils. The objective of this study was to evaluate the effect of three salmon sludge rates on potato (Solanum tuberosum) crop development and its residual effect on annual ryegrass (Lolium multiflorum). The field experiment was carried out on an Andisoil from Osorno Serie (Hapludands), located in Osorno (40o35’S, 73o08’W), Chile. Treatment were three salmon sludge rates (50, 100, 200 t ha-1), a control (no fertilizer), and an inorganic fertilizer treatment. The salmon sludge was incorporated into the soil and then potato tubers cv. Yagana-INIA were planted. After the harvest, an annual ryegrass was seeded. Total potato yield with inorganic fertilizer was 64.3 t ha-1, significantly superior to the results with the salmon sludge rates and the control (P ≤ 0.05). There were no differences (P > 0.05) among the fish sludge rates (45.6 to 47.5 t ha-1)and the control treatment (39.4 t ha-1). In addition, there were no differences (P > 0.05) on tuber weight, but the num
DEFINIENDO HOMO SAPIENS-SAPIENS: APROXIMACIóN ANTROPOLóGICA
Valdebenito,Carolina;
Acta bioethica , 2007, DOI: 10.4067/S1726-569X2007000100008
Abstract: this paper reflects on the similarities and differences between human beings and animals as members of systems in permanent interaction. the main goal is to define homo, reviewing his/her biological and cultural evolution and reflecting on the animal social behaviors that still remain in homo sapiens-sapiens. the paper reflect on the moral dilemmas present in humans as cultural beings, taking as example the ethical dilemmas of violence and incest
Terapias hormonales utilizadas en el control artificial de la madurez sexual en peces de cultivo: una revisión
Valdebenito,I;
Archivos de medicina veterinaria , 2008, DOI: 10.4067/S0301-732X2008000200002
Abstract: the present literature review analyzes the current state of artificial control of sexual maturity in fish culture using hormone therapy, evaluating the advantages and disadvantages of different technological strategies available. the discussion covers from the first successful attempt conducted by houssay (1930), argentina, up to the most recent and more effective techniques of slow release and the use of dopamine inhibitors. in addition, the evaluation of the use of non traumatic methodologies that up until now have not been entirely effective is covered.
DEFINIENDO HOMO SAPIENS-SAPIENS: APROXIMACIóN ANTROPOLóGICA DEFININDO HOMO SAPIENS-SAPIENS: APROXIMA O ANTROPOLóGICA DEFINING HOMO SAPIENS-SAPIENS: ANTHROPOLOGICAL APPROACH
Carolina Valdebenito
Acta Bioethica , 2007,
Abstract: Este artículo reflexiona sobre los encuentros y desencuentros entre el ser humano y el resto de los animales, en tanto miembros de sistemas en permanente interacción(1). Abordar la definición de Homo, repasar su evolución biológica y cultural y reflexionar sobre los resabios de animalidad que quedan en el comportamiento social del Homo sapiens-sapiens es su objetivo principal. Se busca reflexionar sobre los dilemas morales que acompa an al hombre en tanto ser cultural; para ello se analizan dos dilemas éticos: la violencia y el incesto Este artigo reflete sobre os encontros e desencontros entre o ser humano e os demais animais, enquanto membros de sistemas em permanente intera o(1). Seu principal objetivo é abordar a defini o de Homo, tra ar um panorama de sua evolu o biológica e cultural e refletir sobre os resquícios da animalidade que permanecem no comportamento social do Homo sapiens-sapiens. Busca-se refletir sobre os dilemas morais que acompanham o homem enquanto ser cultural, o que para isso s o considerados como dilemas éticos: a violência e o incesto This paper reflects on the similarities and differences between human beings and animals as members of systems in permanent interaction. The main goal is to define Homo, reviewing his/her biological and cultural evolution and reflecting on the animal social behaviors that still remain in Homo sapiens-sapiens. The paper reflect on the moral dilemmas present in humans as cultural beings, taking as example the ethical dilemmas of violence and incest
Terapias hormonales utilizadas en el control artificial de la madurez sexual en peces de cultivo: una revisión Hormone therapy for the artificial control of sexual maturity in fish culture: a review
I Valdebenito
Archivos de medicina veterinaria , 2008,
Abstract: En la presente revisión bibliográfica se analiza el estado actual del control artificial de la madurez sexual en peces de cultivo utilizando terapias hormonales, analizando en forma crítica las ventajas y desventajas de las diferentes estrategias tecnológicas existentes para un cultivador. Se discute desde los primeros intentos exitosos realizados por Houssay (1930) en Argentina, hasta las últimas y cada vez más exitosas técnicas de liberación lenta y el uso cada vez mayor de inhibidores de la dopamina. Además, se discute el uso de metodologías no traumáticas que a la fecha no han resultado del todo exitosas. The present literature review analyzes the current state of artificial control of sexual maturity in fish culture using hormone therapy, evaluating the advantages and disadvantages of different technological strategies available. The discussion covers from the first successful attempt conducted by Houssay (1930), Argentina, up to the most recent and more effective techniques of slow release and the use of dopamine inhibitors. In addition, the evaluation of the use of non traumatic methodologies that up until now have not been entirely effective is covered.
Special Issue on Recent Advances in Nuclear Magnetic Shielding Theory
Marta B. Ferraro
International Journal of Molecular Sciences , 2002, DOI: 10.3390/i3080856
Abstract: No abstract available
Expression of caveolin-1 in rat Leydig cells
Casanova,Marta B.;
Biocell , 2006,
Abstract: caveolin-1, the first member of caveolin family reported, is recognized as the structural component of caveola, a plasma membrane invagination or vesicles that are a subcompartment distinct from clathrin-coated pits. this protein is also known to be involved in cholesterol trafficking. the aim of this study was to determine the expression of caveolin-1 in adult rat leydig cells. testis sections incubated with an antibody to caveolin-1 showed, by immunohistochemistry, a moderate number of leydig cells with different degrees of immunoreaction and a strong reaction in endothelial cells and in the lamina propia of seminiferous tubules. caveolin-1 was detected in the cell cytoplasm with a granular pattern and on the cell surface of leydig cells cultured 24 h on uncoated, laminin-1 or type iv collagen coated coverslips. we also observed a milder reaction in 3 h cultures. immunoreaction was also detected in leydig cells with an antibody to tyrosine-phosphorylated caveolin-1. by double immunofluorescent technique, we observed co-localization of caveolin-1 and 3β-hydroxysteroid dehydrogenase. western blot analysis revealed a band of about 22 kda molecular weight that was recognized with both caveolin-1 and tyrosinephosphocaveolin- 1 antibodies. caveolin-1 is one of a few proteins with a demonstrated ability to bind cholesterol in vivo. in this context, the presence of caveolin-1 in leydig cells may be related to cholesterol traffic -a rate limiting step in steroid biosynthesis.
Mitos fundacionales chilenos
Contreras B.,Marta;
Atenea (Concepción) , 2003, DOI: 10.4067/S0718-04622003048700003
Abstract: some inquiries about the nature of myth in general are proposed in this text. a circuit of questions is proposed whose function is to review the mythic images of father and mother in chilean culture in order to develop a cultural critique. this is realized as a practice of recognition of the names that designate the real and symbolic narration, taking as textual reference the writing of gabriela mistral
第1頁/共151726條
每頁顯示


Home
Copyright ? 2008-2017 Open Access Library. All rights reserved.

久草在现在线中文字幕