Blood in the Aged

Nicola, P; Casale, G

doi:10.1007/978-3-642-68217-9_10

Cited by 3 publications

(3 citation statements)

References 112 publications

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“…4 This modification is realized in several steps to temperaIt is necessary to build the branched molecular tures comprising between 70 and 150ЊC, therefore structure from that destroyed by b-scission via a at temperatures below the melting point of PP, in polyfunctional monomer (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

PP/PE blends by reactive extrusion: PP rheological behavior changes

Graebling¹,

Lambla²,

Wautier

1997

J. Appl. Polym. Sci.

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ABSTRACT:The aim of this work was to obtain a polypropylene (PP) with strain hardening in elongational flow by a reactive extrusion process. This rheological behavior imposes a structural modification of the PP: linear chain to long side branches. Reactive extrusion allows the modification of PP by radical chemistry, but this modification is accompanied by significant degradation of chains: b-scission. A polyfunctional monomer (TMPTA) associated with addition of polyethylene (PE) allows us to limit this degradation and to build a connected structure. Gel permeation chromatography measurements confirm the presence of high-molecular-weight species. With thermal analysis of modified polymers, we show the creation of copolymer PP/PE at the interface of the PE inclusions. Under these conditions, all the reactive blends present strain hardening. The elongational viscosity of all blends can be described by the Leonov model calculated with viscoelastic data. This model gives a good description of the viscosity without adjusted parameters.

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Section: Introductionmentioning

confidence: 99%

PP/PE blends by reactive extrusion: PP rheological behavior changes

Graebling¹,

Lambla²,

Wautier

1997

J. Appl. Polym. Sci.

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“…In these cases it is questionable to use clearance of substances that depend on tubular function as an index of RBF in the absence of determining the renal extraction of these substances. 21 Furthermore, in the analysis of human renal hemodynamics, three important considerations are frequently 22 Second, it is necessary to use an adequate frame of reference for the normalization of RBF. Use of body surface area (BSA) interferes greatly in the estimation of RPF and GFR as a function of sex, race, and body weight.…”

mentioning

confidence: 99%

Renal and systemic hemodynamics in sustained essential hypertension.

London¹,

Me²,

Sassard³

et al. 1984

Hypertension

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SUMMARY Cardiac output (CO), renal blood flow (RBF), calf blood flow (CBF), and hepatic blood flow (HBF), glomerular filtration rate (GFR), and dopamine beta hydroxylase (D/3H) activity were studied in 198 men (67 normotensive controls and 131 hypertensive patients) of the same age with sustained uncomplicated essential hypertension. In the hypertensive men, the RBF and the RBF/CO ratio were significantly decreased (p < 0.001). The RBF and RBF/CO ratio were negatively correlated with age (p < 0.01), blood pressure (p < 0.01), and D/8H activity (p < 0.01). None of these relationships were observed with CBF and HBF. The observed decreases in RBF and the RBF/CO ratio in hypertensive men were reversed after administration of clonidine and alpha-methyldopa (p < 0.01), but not after administration of propranolol. The study provides evidence that the reduction of renal perfusion in essential hypertension is partly reversible and related to an abnormality in the adrenergic system control. (Hypertension 6: 743-754, 1984) KEY WORDS • renal perfusion • dopamine beta-hydroxylase • renal blood flow • renal plasma flow • glomerular filtration rate • cardiac output • adrenergic system

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“…Organic changes occur gradually: slow and imperceptible at the beginning of the process, until they affect the normal development of daily life activities or interfere with them. [8][9][10][11]…”

Section: Physiological Agementioning

confidence: 99%

Prevalence of risk of falls in a permanent geriatric stay

Sánchez¹

2023

MOJGG

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Aging or also called the normal process of changes that are related to the passage of time starts from when we are born and continues throughout life, and old age is the final phase of life. It is a gradual and adaptive process of a biological, psychological and social type, produced as a consequence of genetically programmed changes, history, lifestyles, environment and social conditions in which the elderly live. On the other hand, old age is a stage of life whose beginning is established by society, which is why the United Nations Organization agreed that, in developing countries, people aged 60 and over are classified as older adults. Within the present work, it is intended to obtain a diagnosis on the prevalence of falls in which the current situation of patients in a permanent geriatric stay located in Irapuato, Guanajuato is shown. This is considered important because during aging structural and functional changes occur in different organs and systems. For this reason, as health professionals, we must know the normal morphological and functional changes of physiological aging, and thus guide the elderly to adapt and improve their lifestyle.

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Blood in the Aged

Cited by 3 publications

References 112 publications

PP/PE blends by reactive extrusion: PP rheological behavior changes

PP/PE blends by reactive extrusion: PP rheological behavior changes

Renal and systemic hemodynamics in sustained essential hypertension.

Prevalence of risk of falls in a permanent geriatric stay

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