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Caerphilly study finds no link between homocysteine and CHD
Lyford Joanna,Fallon UB,Ben-Shlomo Y,Elwood P
Current Controlled Trials in Cardiovascular Medicine , 2001, DOI: 10.1186/cvm-2001-72106
RXJ1313.2-3259, a missing link in CV evolution?  [PDF]
B. T. Gaensicke,K. Beuermann,D. de Martino,H. -C. Thomas
Physics , 1999,
Abstract: We present low-state IUE spectroscopy of the ROSAT-discovered polar RXJ1313.2-3259. The SWP spectrum displays a broad Lyman alpha absorption profile, which can be fitted with a two-temperature model of a white dwarf of Twd=15000K with a hot spot of Tspot=34000K which covers f~0.01 of the white dwarf surface. The white dwarf temperature is atypically low for the long orbital period (4.18h) of RXJ1313.2-3259. This low temperature implies either that the system is a young CV in the process of switching on mass transfer or that it is an older CV found in a prolonged state of low accretion rate, much below that predicted by standard evolution theory. In the first case, we can put a lower limit on the life time as pre-CV of 10e8yrs. In the second case, the good agreement of the white dwarf temperature with that expected from compressional heating suggests that the system has experienced the current low accretion rate for an extended period >10e4yrs. A possible explanation for the low accretion rate is that RXJ1313.2-3259 is a hibernating post nova and observational tests are suggested.
Three in one go: consequential angular momentum loss can solve major problems of CV evolution  [PDF]
Matthias R. Schreiber,Monica Zorotovic,Thomas P. G. Wijnen
Physics , 2015, DOI: 10.1093/mnrasl/slv144
Abstract: The average white dwarf (WD) masses in cataclysmic variables (CVs) have been measured to significantly exceed those of single WDs, which is the opposite of what is theoretically expected. We present the results of binary population synthesis models taking into account consequential angular momentum loss (CAML) that is assumed to increase with decreasing WD mass. This approach can not only solve the WD mass problem, but also brings in agreement theoretical predictions and observations of the orbital period distribution and the space density of CVs. We speculate that frictional angular momentum loss following nova eruptions might cause such CAML and could thus be the missing ingredient of CV evolution.
Gum Chewing and Cognition: An Overview  [PDF]
Lara Tucha, Janneke Koerts
Neuroscience & Medicine (NM) , 2012, DOI: 10.4236/nm.2012.33028
Abstract: In recent years, there was a debate about the effects of gum chewing on various aspects of cognitive functioning. In this review, the results of previous studies are presented and summarized. There is a clear indication that gum chewing can improve various aspects of cognitive functioning including memory, attention and both executive and intellectual functioning. However, there is also clear evidence that chewing gum during cognitive tasks can adversely affect task performance. Therefore, it can be concluded that the replication of (beneficial or detrimental) effects of gum chewing on cognition has been proven to be very difficult. Consequently, the robustness of reported effects of gum chewing on cognition has to be questioned. Suggestions for future research are given.
Increased Gum Arabic Production after Infestation of Acacia senegal with Aspergillus flavus and Pseudomonas pseudoalcaligenes Transmitted by Agrilus nubeculosus  [PDF]
H.A.El Atta,I.M. Aref,S.A. Khalil
Biotechnology , 2011,
Abstract: The aim of this study was to investigate the correlation between the beetle A. nubeculosus and gum arabic production by A. senegal. Some trees were tapped and left open to facilitate infestation by A. nubeculosus and others were covered with wire mesh as control. Gum yield, physical and chemical properties of gum were determined for infested and control trees. A. senegal infested by A. nubeculosus produced significantly more gum than control trees. Infestation also caused significant changes in some physical properties of gum (Colour, shape, size, moisture content and optical rotation) and chemical properties (Ferrous, calcium, magnesium and nitrogen contents), whereas, no significant difference was recorded in phosphorus and manganese contents. Aspergillus flavus Link. and Pseudomonas pseudoalcaligenes Monias were isolated from the mouth parts of A. nubeculosus. Inoculation of the tapped branches of Acacia senegal with a suspension of A. flavus alone or in combination with P. pseudoalcaligenes, resulted in highly significant gum yield as compared to control. It seems that A. flavus and P. pseudoalcaligenes acted as elicitors that have stimulated the synthesis of gum arabic. A. nubeculosus transmitted A. flavus and P. pseudoalcaligenes to the tapped areas. Hence, the beetle was significantly associated with gum production.
One Pot Cat ionization of Cassia Gum to Prepare Gum Derivative for the Use of Personal Care Products
American Journal of Polymer Science , 2012, DOI: 10.5923/j.ajps.20120202.01
Abstract: Cassia gum finds an extensive use in the application of foods as stabilizer, thickener, and clouding agent. But its cat ionization with various nitrogen contents has impeccable influence on its physical properties especially viscosity that exploits its usage in the personal care products. It may be used for the scalp shampoos for conditioning hair makes them lustrous, shiny, and healthy over the period of application. One pot synthesis was investigated to make the preparation commercially feasible and less process time consuming. Hence all the steps involving of preparation, washings were carried out in one pot.
Physicochemical characteristics of Hymeneae courbaril gum
Molina,Edgar; El Kader,Dina Abed; Montero,Keyla; Parra,Yonathan; á?ez,Omaira; León de Pinto,Gladys; Bravo,Adriana;
Revista Técnica de la Facultad de Ingeniería Universidad del Zulia , 2008,
Abstract: hymeneae courbaril, wild plant located in venezuela, produces a clear gum at seed level, which is very soluble in water. it was determined analytical characteristics of this gum., general analytical data, proximate analysis, dietary fiber content, mineral composition, and amino acid composition. classic analytical methods for characterization of the gums; hplc and atomic absorption spectroscopy were used. the gum contains galactose, glucose, arabinose and xylose. it also contains a high proportion of dietary fiber content (73.75%) and calcium, magnesium, sodium and potassium. in addition, the gum has relatively high protein content (6.62%). tannins, alkaloids, cyanides and toxic metals were absent in the gum. the physicochemical characteristics of the gum from hymeneae courbaril may suggest its possible use as additive in food industry; therefore, it would be interesting to study the food functionality of that gum.
The ventro-medial prefrontal cortex: a major link between the autonomic nervous system, regulation of emotion, and stress reactivity?
Alexander H?nsel, Roland von K?nel
BioPsychoSocial Medicine , 2008, DOI: 10.1186/1751-0759-2-21
Abstract: This review selectively summarizes literature in which vmPFC activation was studied in healthy subjects as well as in patients with affective disorders. The reviewed literature suggests that vmPFC activity plays a pivotal role in biopsychosocial processes of disease. Activity in the vmPFC might link affective disorders, stressful environmental conditions, and immune function.Since Walter Cannon described the behavioral and physiologic sequels of the fight-flight response in cats, research has come a long way by studying the many physiologic consequences of acute and chronic stress conditions in humans [1,2]. The fight-flight response is essentially adaptive and includes a change of activity in the autonomic nervous system. In the long run, however, increases in the sympathetic and decreases in the parasympathetic nervous system, respectively, may lead to increased cardiovascular morbidity and mortality [3,4].Cardiovascular morbidity and mortality is affected by mental disorders as major depressions. For instance, patients with a co-morbid major depressive disorder show a poor prognosis after myocardial infarction [5]. Interestingly, depressive disorders are associated with disturbances in autonomic nervous system activity measured by heart rate variability [6]. Moreover, other mental disorders such as panic disorder or social phobia also show altered functions of the autonomic nervous system [7-9].The question about which brain areas are related to mental disorders still needs to be answered. However, some insight has been gained in brain areas responsible for changed activity in the autonomic nervous system. There is also a growing literature on neuroscientific mechanisms in emotion regulation. This evidence may help to better understand how mental processes are related to alterations in peripheral physiology and to explain how mental disorders might influence the course of somatic disease.This review aims to focus mainly on the ventro-medial prefrontal cortex (vmP
Annals of West University of Timi?oara : Series of Biology , 2003,
Abstract: The gum and the desmodontium are constituent parts of the morpho-functional complex of the parodontium. Depending on its topographic situation, we can describe three portions of the gum: alveolar, marginal and interdental, each one having its features. Within the gum, the collagen fibres from the subepihtelial net are grouped in alveologingival, dentogingival, circular and interdental, the last ones being seen by us as a single group, called peridental fibres. The desmodontium or the alveolodental ligament or the parodontal ligament makes the relation between the alveolar bone and the radicular cement within the dentoalveolar articulation, articulation known under the name of gomphosis, a syndesmose that does not allow any movement to the tooth. Depending on their topographic situation, the collagen fibres in the constitution of the alveolodental ligament, also called cemento-alveolar fibres, can be divided in marginal, intermediary and apical. The alveolodental ligament has the important role in the transmission of the chewing forces to the resistance structures within the functional architectonics of the cranium.
Savaliya Pratik,Karigar Asif,Ramana MV,Patel Mitul
International Research Journal of Pharmacy , 2011,
Abstract: Chewing gum as a drug delivery system has many advantages over other oral dosage forms and oral route is the most preferred route amongst the patient and clinicians because the first pass metabolism can be avoided by the absorption of drug through buccal mucosa in the systemic circulation. It can be applied to cure and prevent the dental caries, pain, smoking cessation, obesity, xerostomia, motion sickness, acidity and specially diabetes. It has many advantages like fast onset of action, no first pass metabolism, patient compliance, taste masking, reduced risk of erosion of gastric mucosa, overdose and some marketing advantages. This review indicates that further study on medicated chewing gum can be used to improve it as a modern drug delivery.
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