Results 21 to 30 of about 357 (173)

DISINFECTION AND CALLUSES ON THREE TYPES OF EXPLANTS AGAVE COCUI TRELEASE

open access: yesRevista Arbitrada Interdisciplinaria Koinonía, 2018
The cocuy, Agave cocui Trelease, is specie of agro-ecological and economic importance in semiarid areas, mainly for the production of liquor. Currently, wild populations are exploited without reforestation causing a reduction them.
Yuslegny Chirino Boniel   +2 more
doaj  

Preliminar studies on somaclonal variation of carnation (Dianthus caryophyllus), and "in vitro" selection of calluses and plantlets resistants to fusarial wilt Estudios preliminares para la inducción de variación somaclonal en clavel (Dianthus caryophyllus), y selección 'in vitro' de callos y plántulas tolerantes a F. Oxysporum f. sp. dianthi

open access: yesAgronomía Colombiana, 1990
Five experiments were carried outin the laboratory to obtain callus and plantlets from young petals of carnation(Dianthus caryophyilus) using differentconcentrations of BAP, NAA, 2,40 and light/dark treatments.
Álzate M. Ana L.   +2 more
doaj  

Do Institutions Make Street‐Level Bureaucrats Prosocial? Agent‐Based Evidence Shows That New Public Management Does Not

open access: yesEuropean Policy Analysis, Volume 12, Issue 2, Spring 2026.
ABSTRACT Does street‐level bureaucrats' (SLBs) willingness to sacrifice their own self‐interests to meet the needs of their clients vary depending on their contexts? To date, it has been very challenging to empirically examine how SLBs who have different orientations toward social values might act in different institutional and administrative contexts.
Nissim Cohen, Teddy Lazebnik
wiley   +1 more source

ALKALOIDS FROM SEVERAL SUBCULTURES OF Erythrina americana Miller CALLUSES

open access: yesRevista Chapingo Serie Horticultura, 2005
Se detectaron alcaloides del tipo isoquinolínico en callos y semillas de la especie Erythrina Americana Miller, los cuales fueron identificados por la técnica de cromatografía de líquidos acoplada a espectrometría de masas.
M. R. García-Mateos   +3 more
doaj  

Street‐Level Institutional Work: How Social Workers Maintain, Disrupt, and Create the Rules of Social Organizations

open access: yesEuropean Policy Analysis, Volume 12, Issue 2, Spring 2026.
ABSTRACT Research has shown that street‐level workers may shape public policies, yet less is known about the processes through which they attempt to influence institutional arrangements. This gap is particularly evident in corporatist welfare states, where multiple organizations are involved in social policy implementation.
Olivia Mettang
wiley   +1 more source

A Preliminary Assessment of Noise‐Related Impacts From the Urban‐Invasive Johnstone's Whistling Frog (Eleutherodactylus johnstonei) 城市入侵物种约翰斯通鸣蛙 (Eleutherodactylus johnstonei) 引起的噪声影响初步评估 Una evaluación preliminar de los impactos relacionados con el ruido de la rana silbadora de Johnstone (Eleutherodactylus johnstonei), especie urbana invasora

open access: yesIntegrative Conservation, Volume 5, Issue 1, Page 104-114, March 2026.
The Johnstone's whistling frog is an invasive species whose loud night‐time calls may affect human health and well‐being. Our study in Cali, Colombia, combined fieldwork and online surveys to assess its urban occupancy, density, and potential health impacts.
Rubén Darío Palacio, Sumana Goli
wiley   +1 more source

Establishment of cell suspension cultures of two Costa Rican Jatropha species (Euphorbiaceae)

open access: yesRevista de Biología Tropical, 2013
J. curcas has been studied in different countries and some interesting agronomic, pharmacological and industrial properties have been reported. More recently, it has been considered an important alternative source for biofuel production. The objective of
Laura Yesenia Solís-Ramos   +2 more
doaj  

EVALUATION OF TWO BRASSINOSTEROID ANALOGUES ON CALLUS FORMATION AND SHOOT INDUCTION IN SWEET POTATO (Ipomoea batatas (L.) Lam.)

open access: yesCultivos Tropicales, 2003
Se seleccionaron explantes del limbo foliar y se sembraron en el medio de cultivo de Murashige y Skoog con 2,4-D (0.1 mg.L-1) y 6-BAP (0.2 mg.L-1), combinados con los análogos de brasinoesteroides Biobras-6 (BB-6) o MH-5 a diferentes concentraciones (0 ...
O. González   +6 more
doaj  

Undetected cases after implementation of first‐trimester anomaly scan in low‐risk population: insights from the IMITAS study

open access: yesUltrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 27-33, January 2026.
ABSTRACT Objective To assess the effectiveness of the first‐trimester anomaly scan (FTAS) performed as part of a centrally steered national screening program in The Netherlands by investigating false‐negative cases with a fetal structural anomaly that was not detected at the FTAS.
K. Bronsgeest   +18 more
wiley   +1 more source

Establecimiento de un cultivo de celulas en suspensión de Eucalyptus cinérea

open access: yesRevista Colombiana de Biotecnología, 2002
Se desarrolla un protocolo para la obtención y establecimiento de suspensiones celulares de E. cinerea. La concentración de las hormonas 2,4 D Y BAP tienen un efecto significativo en la formación de callos friables de E. cinerea, obteniendo una respuesta
Fernando Orozco Sáncnez   +2 more
doaj  

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