Flavonoid studies in four species of the Oxytropis campestris complex (Fabaceae–Galegeae)

1982 ◽  
Vol 60 (8) ◽  
pp. 1431-1436 ◽  
Author(s):  
W. J. Elisens ◽  
K. E. Denford

Thirteen flavone and eight flavonol glycosides from four taxa of Oxytropis campestris (L.)DC. s. lat. have been isolated and identified. The compounds are based on five aglycone moieties and have several characteristic glycosidic patterns. Unlike some previously examined polyploid complexes, the component taxa have markedly divergent flavonoid profiles. It appears that considerable phytochemical differentiation has accompanied morphological and cytological diversification within the complex. These data support taxonomic recognition of the component taxa at the specific level.

Phytotaxa ◽  
2019 ◽  
Vol 406 (1) ◽  
pp. 64 ◽  
Author(s):  
ANGEL ROMO ◽  
MAŁGORZATA MAZUR ◽  
MONTSERRAT SALVÀ-CATARINEU ◽  
ADAM BORATYŃSKI

Analyses based on cone, seed and needle characteristics revealed that J. canariensis Guyot in Mathou & Guyot is distinct from both the Circum-Mediterranean J. turbinata and West-Mediterranean J. phoenicea. The genetic differences between these three taxa, which make up the aggregate of J. phoenicea, are found also at a high level. These data support the recognition of the Canarian juniper at the specific level. A key is proposed, in which taxa of the J. phoenicea aggregate can be distinguished on the basis of morphological traits.                The nomenclatural name: Juniperus phoenicea subsp. canariensis, widely employed in the literature, is validly published. Besides we adduce that Juniperus canariensis Knight ex Godron, is not a validly published name, and therefore can not be considered an earlier homonym of J. canariensis Guyot in Mathou & Guyot.


Author(s):  
George C. Ruben ◽  
Kenneth A. Marx

In vitro collapse of DNA by trivalent cations like spermidine produces torus (donut) shaped DNA structures thought to have a DNA organization similar to certain double stranded DNA bacteriophage and viruses. This has prompted our studies of these structures using freeze-etch low Pt-C metal (9Å) replica TEM. With a variety of DNAs the TEM and biochemical data support a circumferential DNA winding model for hydrated DNA torus organization. Since toruses are almost invariably oriented nearly horizontal to the ice surface one of the most accessible parameters of a torus population is annulus (ring) thickness. We have tabulated this parameter for populations of both nicked, circular (Fig. 1: n=63) and linear (n=40: data not shown) ϕX-174 DNA toruses. In both cases, as can be noted in Fig. 1, there appears to be a compact grouping of toruses possessing smaller dimensions separated from a dispersed population possessing considerably larger dimensions.


2008 ◽  
Vol 11 (2) ◽  
pp. 56-60 ◽  
Author(s):  
Jill K. Duthie

Abstract Clinical supervisors in university based clinical settings are challenged by numerous tasks to promote the development of self-analysis and problem-solving skills of the clinical student (American Speech-Language-Hearing Association, ASHA, 1985). The Clinician Directed Hierarchy is a clinical training tool that assists the clinical teaching process by directing the student clinician’s focus to a specific level of intervention. At each of five levels of intervention, the clinician develops an understanding of the client’s speech/language target behaviors and matches clinical support accordingly. Additionally, principles and activities of generalization are highlighted for each intervention level. Preliminary findings suggest this is a useful training tool for university clinical settings. An essential goal of effective clinical supervision is the provision of support and guidance in the student clinician’s development of independent clinical skills (Larson, 2007). The student clinician is challenged with identifying client behaviors in the therapeutic process and learning to match his or her instructions, models, prompts, reinforcement, and use of stimuli appropriately according to the client’s needs. In addition, the student clinician must be aware of techniques in the intervention process that will promote generalization of new communication behaviors. Throughout the intervention process, clinicians are charged with identifying appropriate target behaviors, quantifying the progress of the client’s acquisition of the targets, and making adjustments within and between sessions as necessary. Central to the development of clinical skills is the feedback provided by the clinical supervisor (Brasseur, 1989; Moss, 2007). Particularly in the early stages of clinical skills development, the supervisor is challenged with addressing numerous aspects of clinical performance and awareness, while ensuring the client’s welfare (Moss). To address the management of clinician and client behaviors while developing an understanding of the clinical intervention process, the University of the Pacific has developed and begun to implement the Clinician Directed Hierarchy.


2006 ◽  
Vol 40 (3) ◽  
pp. 39
Author(s):  
SHARON WORCESTER

2012 ◽  
Vol 43 (2) ◽  
pp. 1-9
Author(s):  
MIRIAM E. TUCKER
Keyword(s):  

2009 ◽  
Vol 2 (8) ◽  
pp. 8
Author(s):  
BRUCE JANCIN
Keyword(s):  

2012 ◽  
Vol 42 (14) ◽  
pp. 28
Author(s):  
SUSAN LONDON
Keyword(s):  

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
A Nugroho ◽  
JK Choi ◽  
JH Park ◽  
BC Cha ◽  
HJ Park

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