oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 176 )

2018 ( 296 )

2017 ( 320 )

2016 ( 408 )

Custom range...

Search Results: 1 - 10 of 139790 matches for " Mona K. Olofsson "
All listed articles are free for downloading (OA Articles)
Page 1 /139790
Display every page Item
How many systolic and diastolic variables must be measured in elderly patients with symptoms of heart failure?  [PDF]
Jan B. Remmets, Mona K. Olofsson, Hans Stenlund, Kurt O. Boman
World Journal of Cardiovascular Diseases (WJCD) , 2012, DOI: 10.4236/wjcd.2012.22017
Abstract: Objectives: To explore the concordance and the feasibility of obtaining systolic or diastolic variables of left ventricular function in elderly patients with heart failure symptoms. Methods: One hundred twenty four patients with symptoms of heart failure (mean age 77 years, 70% females) were included in a cross-sectional, explorative study. Nineteen echocardiographic variables (7 systolic and 12 diastolic) were measured. Results: Overall, feasibility ranged from 93% to 100% for 15 variables and was 48% for mitral regurgitation dp/dt(MRdp/dt), 66% for the difference between pulmonary AR-dur and mitral A-dur, 81% for the ratio between early and late mitral inflow velocity (E/A), and 76% for tissue Doppler imaging late dia-stolic velocity (TDI A’). Concordance was very good/ good in 83% and poor/missing in 17% of systolic variables, whereas it was very good/good for 67% of diastolic variables and poor/missing for 33%. Factor analysis reduced systolic variables to two factors that explained 69% of the total variance in systolic function. Conclusions: Low feasibility for some and questionable concordance of especially diastolic variables questions the rationale for routinely measuring a high number of echocardigraphic variables. The results of the factor analysis further strengthen the possibility of reducing the number of measured variables. The clinical value of such a reduction needs to be validated.
Adolescent Health in India: Still at Crossroads  [PDF]
Mona Gupta, K. V. Ramani, Werner Soors
Advances in Applied Sociology (AASoci) , 2012, DOI: 10.4236/aasoci.2012.24042
Abstract: Internationally, Adolescent Reproductive and Sexual Health (ARSH) has become a priority programme approach to help the future generations have a safe, healthy and satisfactory life. India is yet to develop a comprehensive policy on ARSH mainly due to lack of inter-ministerial collaboration, socio-cultural and politico-religious factors, even though evidence from surveys and non- governmental organization projects has corroborated the case for ARSH since late 1980s. Fortunately, recent evidence provided by Sample Registration Survey (SRS) 1999, Census 2001, National Family Health Survey (NFHS)-II and District Level Household Survey (DLHS) 2004 particularly on early marriage, teen pregnancy, anaemia and unmet need for contraception has led GoI to recognize the importance of adolescent health. However, a comprehensive ARSH policy is yet to emerge, since components of adolescent health are being addressed by separate ministries and departments. Adolescent health in India is still in an infant stage and at the risk of infanticide. From “health for the adolescents” to “health with the adolescents”, it is still a long way to go.
Some Properties of Inulinase from Aspergillus fumigatus
Mona K. Gouda
Pakistan Journal of Biological Sciences , 2002,
Abstract: A local isolate identified as Aspergillus fumigatus was tested for inulinase and invertase production. Different carbon sources alone or in combination with inulin were tested. About 91% inulinase was found as extracellular enzyme in culture medium with inulin and wheat bran as sole C-source (1% for each). The activity towards sucrose (invertase enzyme) was detected only in the supernatant and represents about 26% from the inulinase activity. The production of both enzymes was inhibited with ammonical compounds as nitrogen source, whereas the maximum level (3.72, 0.35 U/ml for inulinase and invertase respectively) was observed when 0.38% KNO3 was used as nitrogen source. Beef extract, yeast extract, peptone and tryptone reduced the amount of inulinase by about 83-91%. Both enzymes were produced in a broad pH range between 4.0-8.0 as initial pH. Optimum temperature was found to be 30oC for inulinase and a dramatic reduction was observed above 35oC, while 40oC was observed for invertase. The properties of crude inulinase were also studied. The enzyme has optimum pH 5.5 in acetate buffer and optimum temperature 45oC. Fructose at concentrations higher than 0.2mg/reaction mixture inhibited the enzyme activity. The enzyme was stable for 30 min at 30oC and 40oC in pH 5.5 and for 24h at 4oC in pH 6 - 6.5. Addition of 10% glycerol protected the enzyme from deactivation at 45oC and 50oC for 30 min. The enzyme was completely inhibited by 1mM Ag+ and Hg2+ and activated by the presence of 1mM Ca2+ or Mn2+.
Two echelon partial trade credit financing in a supply chain derived algebraically
Jaggi Chandra K.,Verma Mona
Yugoslav Journal of Operations Research , 2012, DOI: 10.2298/yjor100108017j
Abstract: Trade credit financing has become a powerful tool to improve sales & profit in an industry. In general, a supplier/retailer frequently offers trade credit to its credit risk downstream member in order to stimulate their respective sales. This trade credit may either be full or partial depending upon the past profile of the downstream member. Partial trade credit may be offered by the supplier/retailer to their credit risk downstream member who must pay a portion of the purchase amount at the time of placing an order and then receives a permissible delay on the rest of the outstanding amount to avoid non-payment risks. The present study investigates the retailer’s inventory problem under partial trade credit financing for two echelon supply chain where the supplier, as well as the retailer, offers partial trade credit to the subsequent downstream member. An algebraic approach has been applied for finding the retailer’s optimal ordering policy under minimizing the annual total relevant cost. Results have been validated with the help of examples followed by comprehensive sensitivity analysis.
Classifying the secondary component of the binary star W Aquilae
T. Danilovich,G. Olofsson,J. H. Black,K. Justtanont,H. Olofsson
Physics , 2015, DOI: 10.1051/0004-6361/201423672
Abstract: AIMS: The object W Aql is an asymptotic giant branch (AGB) star with a faint companion. By determining more carefully the properties of the companion, we hope to better constrain the properties of the AGB star. METHODS: We present new spectral observations of the binary star W Aql at minimum and maximum brightness and new photometric observations of W Aql at minimum brightness. RESULTS: The composite spectrum near minimum light is predominantly from the companion at wavelengths $\lambda$ < 6000 $\AA$. This spectrum can be classified as F8 to G0, and the brightness of the companion is that of a dwarf star. Therefore, it can be concluded that the companion is a main sequence star. From this, we are able to constrain the mass of the AGB component to 1.04 - 3 $M_\odot$ and the mass of the W Aql system to 2.1 - 4.1 $M_\odot$ . Our photometric results are broadly consistent with this classification and suggest that the main sequence component suffers from approximately 2 mag of extinction in the V band primarily due to the dust surrounding the AGB component.
High-resolution HST/ACS images of detached shells around carbon stars
H. Olofsson,M. Maercker,K. Eriksson,B. Gustafsson,F. Schoier
Physics , 2010, DOI: 10.1051/0004-6361/200913929
Abstract: Aims: The detached shells carry information on their formation process, as well as on the small-scale structure of the circumstellar medium around AGB stars due to the absence of significant line-of-sight confusion. Methods: The youngest detached shells, those around the carbon stars R Scl and U Cam, are studied here in great detail in scattered stellar light with the Advanced Survey Camera on the Hubble Space Telescope. Quantitative results are derived assuming optically thin dust scattering. Results: The detached dust shells around R Scl and U Cam are found to be consistent with an overall spherical symmetry. They have radii of 19.2" (corresponding to a linear size of 8x10^16 cm) and 7.7" (5x10^16 cm), widths of 1.2" (5x10^15 cm) and 0.6" (4x10^15 cm), and dust masses of 3x10^-6 and 3x10^-7 M(Sun), respectively. The dynamical ages of the R Scl and U Cam shells are estimated to be 1700 and 700 yr, respectively, and the shell widths correspond to time scales of 100 and 50 yr, respectively. Small-scale structure in the form of less than arcsec-sized clumps is clearly seen in the images of the R Scl shell. Average clump dust masses are estimated to be about 2x10^-9 M(Sun). Comparisons with CO line interferometer data show that the dust and gas shells coincide spatially, within the errors (<=1" for U Cam and approx. 2" for R Scl). Conclusions: The results are consistent with the interpretation of geometrically thin gas and dust shells formed by a mass-loss eruption during a He-shell flash, and where interaction with a previous wind plays a role as well. Clumpy structure is present in the R Scl shell, possibly as a consequence of the mass loss itself, but more likely as a consequence of instabilities in the expanding shell.
Metabolic Response of the Two Marine Unicellular Algae Chlorella salina and Dunaliella bardawil to Toxicity of the Antifouling Agent Irgarol 1051  [PDF]
Mona Kaamoush
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.99056
Abstract: Toxic pollutants are metabolic poisons that can seriously injure or destroy the photosynthetic organisms upon which the food chain depends. Since microalgae play a key role in marine ecosystems, marine microalgae are proposed as excellent bio-indicators of pollution due to their high sensitivity, which can give warning of the toxic effects of chemicals sooner than any other species. The aim of this work concentrated on the effect of different concentrations of the antifouling biocide (Irgarol 1051) on growth and chlorophylls content (as an essential metabolite) of the two marine unicellular green algae Chlorella salina and Dunaliella bardawil that usually used in fish feeding. The growth of the wall-less Dunaliella bardawil was more sensitive to Irgarol 1051 than the walled cells Chlorella salina, although the concentrations used were greatly different. The product of photosynthesis in the two algal species greatly affected since in the presence of Irgarol 1051, a serious destructive effect was observed. The cell wall appeared to play a significant role in protecting the organism against toxicity of the antifouling agent either by adsorption or degradation. The strength of toxicity depends mainly on the concentration of the antifouling agent, the length of culturing period and the type of organism tested.
Determinants of Patient Satisfaction at Tertiary Care Centers in Lebanon  [PDF]
Mona Abu Ammo, Amani K. Abu-Shaheen, Samer Kobrosly, Mohamad A. Al-Tannir
Open Journal of Nursing (OJN) , 2014, DOI: 10.4236/ojn.2014.413100
Abstract:
Objective: To assess patient satisfaction with services provided in inpatient health care settings in Lebanon. Methods: Our cross-sectional study enrolled patients who spent a minimum of one night in any ward at accredited hospitals in various regions of Lebanon. A structured questionnaire covering multiple domains was utilized to assess patient satisfaction as well as capture demographic data and visit characteristics. Results: From the pool of 1300 patients given questionnaires, a high response rate (92.8%; 1206) was achieved. Most (60.4%) respondents had the second class medical insurance coverage; only 99 (8.2%) had a first class coverage. Patient satisfaction was influenced by age, educational level, and medical insurance coverage class. Most respondents were pleased with overall nursing care (96.6%), and physician consultations (95.4%), P = 0.001. Conclusions: Patient satisfaction with hospital care is significantly influenced by patient’s provider interactions during the episodes of care. Furthermore, the surrounding physical environment also has an influence on patient satisfaction. Also, our results showed the acceptable level of satisfaction about the healthcare system delivered in Lebanon. This could be enhanced if appropriate management decisions will be implemented to overcome weakness and barriers.
The Role of Serum Trace Elements and Oxidative Stress in Egyptian Breast Cancer Patients  [PDF]
Mona Mohamed K. El-Deeb, Heba G. El-Sheredy, Ayman Farouk Mohammed
Advances in Breast Cancer Research (ABCR) , 2016, DOI: 10.4236/abcr.2016.51004
Abstract: Background: Oxidative stress is considered to be involved in the pathophysiology of all cancers. Studies indicated that the levels of oxidative stress markers increased in breast cancer. Trace metals are essential to normal human homeostasis. When present in an abnormal expression, they contribute in many pathological processes. Some trace metals are claimed to be carcinogenic and capable of inducing a toxic effect through the formation of free radicles and acting as cofactors in the oxidative damage of biological macromolecules and DNA. Objective: Our aim was to investigate the serum levels of some trace elements (Copper, Zinc and Cadmium), the total oxidative and anti-oxidative capacity (TOC and TAC) in patients with breast cancer in comparison to patients with benign breast tumours. Patients and Methods: The present study included 65 females. The participates were divided into 2 main groups: control group which consisted of 20 apparently healthy female; the patient groups which divided into 3 groups: group B included 15 patients with benign breast tumours, group N consisted of 15 newly diagnosed breast cancer patients and group M included 15 patients with metastatic breast cancer. Results: The mean serum levels of Copper, Zinc, and Cadmium were significantly higher in the three patients groups (B, N and M) than the control group. Similarly, serum uric acid (UA) and (TAC) levels showed significant higher level in both breast cancer groups as compared to the benign group. However TOC levels showed only significantly higher level in metastatic group. Conclusions: The present study suggested elevated TAC, UA and TOC in breast cancer patients. The increased levels of trace elements could lead to formation of free radicals or other reactive oxygen species. The serum profile of these trace metals may be helpful in predicting prognosis of breast cancer.
In Vitro Characterization of Stem Cells from Human Exfoliated
Sarah Yasser,Naglaa Nagy,Mona K. Marei
Macedonian Journal of Medical Sciences , 2012,
Abstract: Stem cells from human exfoliated deciduous teeth (SHED) provide a new attractive source for stem cells; in this study we further characterize SHED. SHED were isolated, differentiated using osteogenic/ odontogenic differentiation media, characterized using light microscope, SEM and immunocytochemistry using CD44. Also, Immunohistochemistry using CD44 was performed on extirpated pulp tissues. We found that a naturally exfoliated human tooth contains a population of stem cells that attain morphological homogeneity after the first passage, on adding the osteogenic/odontogenic medium, sporadic nodule-shaped structures were observed after two weeks that were positively stained with alizarin red and von Kossa stains. SHED stained with H& E showed a basophilic, eccentric nucleus with an eosinophilic cytoplasm in which two differently stained areas were clearly distinguishable. Also we found using SEM that SHED spread on the UBM scaffolds surfaces showing multiple filopodia and formed collagen-like structures by the seventh day. After three weeks, seeded scaffolds incubated in osteogenic/odontogenic media showed many mineralized nodules in the ECM. Cultured SHED revealed positive immunoreactivity when treated with CD44. Also, sections of pulp tissue treated with CD44 depict positively stained cells situated mainly in the perivascular areas reinforcing the hypothesis that pericytes may be the origin of SHED.
Page 1 /139790
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.