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Structural Investigation of Chemical Treated Polyester Fibers Using Saxs and Other Techniques  [PDF]
S. Bal, R.C. Behera
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2006, DOI: 10.4236/jmmce.2006.52013
Abstract: Structural macromolecular parameters of normal and treated (acid & alkali) polyester fibers have been investigated using Small Angle X-ray Scattering (SAXS) technique. Average diameters were calculated from Scanning electron microscope (SEM) micrographs and mechanical parameters were estimated using Instron. Further, crystallinity parameters of the same fibers have been determined using X-ray diffraction (XRD) and Thermal analysis. These results supplement the findings of SAXS, SEM and Instron. Comparison and analysis of results confirm some changes in the microstructure of fiber after chemical treatment due to breaking of macromolecules. The findings conclude that degradation of acid treated fiber is more than that of alkali treated fiber.
ROTEM analysis: A significant advance in the field of rotational thrombelastography
R.C Franz
South African Journal of Surgery , 2009,
Abstract: At the turn of the century, a significant advance in the rapidly expanding field of rotational thrombelastography (ROTEG), known at present as thrombelastometry or ROTEM analysis, was developed at the Ludwig-Maximillian University in Munich. The measuring unit is operated by a laptop computer. There are four temperature-controlled measuring channels in which the global assays not only detect coagulation factor defects but also platelet function, abnormal fibrinogen polymerisation, anticoagulant defects and hyperfibrinolysis. ROTEM has steadily increased in popularity, particularly because of its well-established application as a diagnostic aid at the point of care in the critical care situation. It also provides a useful guide in the choice of an appropriate therapeutic option in the bleeding patient, reducing costs by avoiding administration of costly component therapy such as fresh-frozen plasma, cryoprecipitate, platelet concentrates or antifibrinolytic agents. As well as being useful in monitoring anticoagulant therapy and the use of pharmacological agents, ROTEM is a valuable research tool in the field of hypercoagulability, fibrinolysis, factor XIII activity and the ultimate phases of the blood coagulation process.
Ir. Soekarno’s vier brieven
R.C. Kwantes
Bijdragen tot de Taal-, Land- en Volkenkunde , 1987,
Abstract:
In memoriam Simon Lambertus van der Wal
R.C. Kwantes
Bijdragen tot de Taal-, Land- en Volkenkunde , 1979,
Abstract:
Ware sekerheid
R.C. Heimstra
Koers : Bulletin for Christian Scholarship , 1968, DOI: 10.4102/koers.v35i5&6.1404
Abstract: Nêrens anders in die wye wêreld sou ons vandag liewer wou leef as hier in ons eie Republiek van Suid-Afrika nie. Hier is dit, in blakende sonlig, en dit behoort aan u. Ek sê dat dit die moeite werd is om daarvoor te veg. Dit is die moeite werd om daarvoor te lewe. Dit is die moeite werd om groot dinge daarvoor te doen. En dit is wat die mense van ons volk nog altyd gedoen het, die grotes en die tienduisende nederiges, elkeen op sy eie terrein, elkeen met die sekerheid in sy hart dat sy standpunt waar en reg was, sy doelstellinge rein en edel. So het hulle ons geskiedenis gemaak en aan ons volk ’n eie karakter gegee. So is ons Republiek geskep en gevorm deur mense op wie die volk kon vertrou. Dit is u Suid-Afrika, en as die dag aanbreek dat hierdie land van ons so besmet raak met die ondermynende en vernietigende denkrigtings van ’n verdwaasde en chaotiese wêreld, dat ons nie meer die kern, die hart en die siel van die bron van ons geestelike krag kan herken nie, dat ons ophou om mense te lewer op wie ons kan vertrou, sal ons ophou om as ’n volk te bestaan.
Bornhardts and associated fracture patterns Bornhardts y dise os de fractura asociados
R.C. Twidale
Revista de la Asociación Geológica Argentina , 2007,
Abstract: Bornhardts are bald domical hills. In plan they are defined by systems of steeply-dipping fractures, in profile by arcuate-upward sets. They occur in multicyclic landscapes. They have formed through much of geological time, for some date from the Late Archaean and are represented in most subsequent periods. They have been explained as due to tectonism, or structure or environment, but most workers interpret them either as the last remnants surviving long-distance scarp retreat (monadnocks de position), or as two-stage or etch forms which have survived because of their massive structure (monadnocks de résistance). The field evidence suggests that though bornhardts originate in various ways, on balance most appear to be of etch origin. They were initiated at the base of the regolith by differential structurally-controlled subsurface weathering. Many have been exposed in stages. Differential weathering is based in variations in fracture density which is attributed to shearing and fracture propagation. Similarly recurrent shear stresses are responsible for the arcuate fractures characteristic of bornhardts. Los bornhardt son colinas dómicas descubiertas. En planta se ven delimitadas por planos de fractura con fuerte buzamiento, en perfil por otros planos convexos. Se asocian a paisajes multicíclicos. Se han formado a lo largo de los tiempos geológicos ya desde el Arqueano tardío. Han sido interpretados bien por tectonismo, bien por estructura o bien por razones ambientales, pero muchos investigadores las entienden como los últimos restos que han sobrevivido a un retroceso de escarpes prolongado en el tiempo (monadnocks de posición), o como formas de corrosión química o de dos etapas que han sobrevivido a la degradación química/física debido a la estructura masiva de la roca en ese punto (monadnocks de resistencia). Las variaciones en la densidad de fracturación se atribuyen a cizalla y a propagación de fracturas. La fracturación arqueada se relaciona igualmente con tensiones corticales antiguas o activas en el momento actual. Aunque los bornhardt se pueden originar de varias formas, cuando se consideran todas las posibles muchos parecen ser formas de dos etapas iniciadas en la base del regolito por meteorización subsuperficial controlada por las diferencias en la estructura. Muchos bornhardts han sido expuestos en varias etapas. Las razones para el desarrollo de los residuales no deben unirse o ser confundidas con el desarrollo de los superficies que habitualmente los rodean. La evolución de estas últimas es independiente de origen, irrelevante para entende
Clinical Profile Of Cutaneous Infections And Infestations In The Paediatic Age Group
Sharma R.C
Indian Journal of Dermatology , 1999,
Abstract: A total number of 15,955 (31.4%) children attended the paediatric dermatology OPD of the kalawati saran children hospital, new Delhi during 1992 to 1994. Out of these, 8176(51.24%) patients were having various infections and parasitic infestations. Majority (38.7%) of the patients were in the school going age group. There were 58% male and 42% female children. The incidence of parasitic infestations was the highest (53.66%) with scabies as the major infestation (46.44%), followed by pyodermas (34.05%), fungal infections (8.42%) with candidal intertrigo as the commonest infection. Incidence of viral infections was 3.85% where molluscum contagiosum was the commonest manifestation.
Metodi economici per la risoluzione di conflitti nell'uso delle risorse idriche
R.C. Bishop
Aestimum , 1990,
Abstract:
Third meeting of the Cysticercosis Working Group in Eastern and Southern Africa takes place in Maputo : to the editor
R.C. Krecek
Journal of the South African Veterinary Association , 2012, DOI: 10.4102/jsava.v76i1.385
Abstract:
Nematode parasites of vertebrates (2nd edition) : their development and transmission, R.C. Anderson : book review
R.C. Krecek
Journal of the South African Veterinary Association , 2012, DOI: 10.4102/jsava.v71i4.729
Abstract:
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