Respuesta del algodonero (Gossypium hirsutum L.) a la fertilización foliar con N, P y K.

El estudio se realizó en Granada (Meta) con la variedad Delta Pine 61. La aplicación foliar de fertilizantes se realizó a los 35, 55 y 75 días después de la germinación del cultivo, utilizando un volumen de agua de 100 l/ha y las siguientes fuentes de fertilizantes: úrea (46 por ciento de N), superfosfato triple (45 por ciento de P2O5) y cloruro de potasio (60 por ciento de K2O). La aplicación foliar de fertilizantes no influyó significativamente en el rendimiento de algodón-semilla, tampoco modificó los componentes del rendimiento y la calidad de la fibra. Se estableció que niveles mayores de 2.5 por ciento de N y de K2O causaron quemazón leve en las hojas a los 35 días. El fósforo en forma de superfosfato triple no causó fitotoxicidad en el follaje del algodoneroAlgodón-Gossypium herbaceumMaestría en CienciasMaestrí

Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU

Contains fulltext : 172380.pdf (publisher's version ) (Open Access

Ocular Histopathologic Features of Congenital Zika Syndrome

Congenital Zika syndrome (CZS) is known to be associated with severe malformations in newborns. Although microcephaly is the hallmark of this disease, the ocular findings are important given the severe visual impairment that has been observed in these patients. Regardless of the increased number of CZS cases reported, to date, no studies have described the ocular histopathologic findings of this entity. To evaluate the presence of Zika virus (ZIKV) antigens and describe the associated ocular histopathologic features of 4 cases of CZS. In this observational case series performed from June 19, 2015, through April 30, 2017, ocular tissue samples from 4 deceased fetuses with a diagnosis of CZS from the National Institute of Health in Colombia were sent to the Florida Lions Ocular Pathology Laboratory for evaluation. The microscopic features of each specimen were described, and immunostaining was performed using a ZIKV NS2B protein antibody. Ocular tissue samples from the 4 deceased fetuses (2 female, 2 male) ranging from 21.5 to 29 weeks' gestation with a diagnosis of CZS were studied. The 4 eyes manifested with pupillary membranes, immature anterior chamber angles, loss of pigment and thinning of the retinal pigment epithelium, choroidal thinning, undifferentiated nuclear layers of the retina, and a perivascular inflammatory infiltrate within the choroid. The optic nerve, present in 2 of the eyes, demonstrated atrophy. Expression of ZIKV antigen was present in the iris in cases 1, 3, and 4; the neural retina and choroid in case 1; and in the optic nerve in case 4. Loss of retinal pigment epithelium, the presence of a thin choroid, a perivascular choroidal inflammatory infiltrate, and atrophic changes within the optic nerve were consistently present. These findings may be attributed to ZIKV infection and warrant further study