Recently Published Articles
Is Natural Selection still have to be Regarded A Foundation Stone of Evolutionary Process?
Abstract:
Natural selection is a buzzword used to describe the main driving force of evolution. Its creative role is believed to be based on: a) an unlimited variety of organisms caused by hereditary variation and b) a direct connection between hereditary changes and their phenotypic expression. These are the two requirements that can lead to the genetically based changing modalities of characters through “iterations” of natural selection in the series of successive generations. Are these two requirements fulfilled in the nature, however? The present study focuses on the analysis of these two “foundation stones” of natural selection. Firstly, hereditary variation is shown to be essentially non-homogenous. New hereditary characteristics of individuals fall onto a narrow “strip of land” in the sea of potential possibilities. Secondly, the consequences of changes in the genotype of an organism are involved into a system of hierarchical multiple compensation, from t...
Narcolepsy With or Without Cataplexy In The Pediatric Population: A Systematic Review
Abstract:
Narcolepsy diagnosis has been associated with a long lag time between the onset of the disorder and the diagnosis itself among patients with the disorder. This article reviews the childhood epidemiology of idiopathic narcolepsy, including its prevalence, subtypes, and disease progression. A literature review was conducted to include both published and unpublished data on pediatric narcolepsy. All English language articles were included through April, 2015. Time from symptom onset to diagnosis for children is approximately three years. The prevalence of cataplexy appears to be lower in children compared to adults, suggesting a later onset of cataplexy. The presence of cataplexy, however, w...
Clinical and Laboratory Predictors of Elevated TRV In Sickle Cell Anaemia
Abstract:
Pulmonary hypertension (PH) has become an increasingly recognized complication in sickle cell anaemia (SCA) and is a major cause of morbidity and mortality. Though the burden of SCA in sub-Saharan Africa is high, there is paucity of data on SCA-associated PH with little or no attention given to it in routine patient care. The current study therefore sought to determine the prevalence of PH and its associated risk factors among adult patients with SCA. This was a cross-sectional study involving 76 clinically stable, hydroxyurea-naive participants. We obtained socio-demographic and clinical history. Measurement of Tricuspid Regurgitant jet Velocity (TRV) was obtained via transthoracic echocardiography and lung function was assessed using spirometry and pulse oximetry. Other investigations were complete blood counts, free plasma haemoglobin, serum urea and creatinine. Twenty-five (32.9%) of study participants had elevated TRV (≥ 2.5m/s) on Doppler echocardiograp...
Investigation and Analysis on Mental Health State of Breast Cancer Patients in China
Abstract:
There are nearly 170,000 new cases of breast cancer in China every year, and this number is showing an increasing trend. Mental health plays an important role in promoting the physical rehabilitation of patients. Therefore, attention paid to their psychological problems needs to be reinforced. The current study aims to investigate the mental health states of the breast cancer patients and provides the references for their psychosomatic rehabilitation in the future work. A total of 643 breast cancer patients completed the whole study. A questionnaire survey on anxiety, depression, posttraumatic stress disorder (PTSD), and posttraumatic growth (PTG) was conducted in Jiangsu Women and Children Health Hospital.
Quantitative Microbiological Risk Assessment: Underrated Tool in Process Improvement in Food Microbiology
Abstract:
This article advocates for routine use of quantitative microbiological risk assessment to strengthen process control. It illustrates how modeling hazard levels and uncertainty informs critical limits, verification, and continuous improvement.
Prospect of Graphene Interface Control for Tougher Ceramic Composites
Abstract:
Graphene-Ceramic Composites (GCCs) have been little studied compared to graphene-polymer composites
Effect of Oxytetracycline Treatment on Postpartum Reproductive Performance in Dairy Buffalo-Cows with Retained Placenta in Egypt
Abstract:
Retained fetal membrane (RFM) is a crucial calving related disorder that affects economic for the farmer and herd health. Retention of Placenta (ROP) is the condition in which the fetal membranes are not expelled within a period of 12 hours after parturition. Buffalo cows (n=34) aged 4-9 years old with 2-6 lactation season were used in the present study. The Experimental buffaloes were divided into either with (n=25) or without (n=9) fetal membrane retention. The objective of this study was to evaluate the effect of oxytetracycline treatment on reproductive performance of buffalo-cows with retained fetal membranes. All buffaloes in treated group received systemic infusion of oxytetracyclin Hcl injection 5% and 10 mg/kg oxytetracycline for 3 days intrauterine. Reproductive performance parameters for all experimental buffaloes were days to first estrous, number of service per conception, days open and pregnancy diagnosis. All reproductive parameters demonstrat...
Integrated Characterization of Cuban Germplasm of Cocoyam (Xanthosoma Sagittifolium (L.) Schott)
Abstract:
The present study aims at integrating the characterization studies conducted on the Cuban germplasm collection of Xanthosoma sagittifolium (Araceae) preserved in the Research Institute of Tropical Roots and Tubers Crops (INIVIT). Differentiation of accessions was done by combining qualitative and quantitative descriptors to clarify the relationships between six well-defined groups. The results may be used to establish a core collection for improved management of Xanthosoma spp. germplasm.
Reproductive Performance and Factors Influencing Fetal Outcome: A Practical Guide to Experiments on Lung Development in A Nitro Fen-Induced Rat Model for Congenital Diaphragmatic Hernia
Abstract:
Our study aims to help researchers calculate resources based on a rat breeding colony for experiments on fetal lung development. The Wistar rat is commonly used in experimental research. In the context of fetal lung studies, the nitrofen rat is a model for pulmonary hypoplasia and congenital diaphragmatic hernia. Data needed to calculate resources for new experiments are not easily available. We prospectively acquired data on the reproductive performance and fetal outcome of 314 consecutive virgin Wistar dams in our fetal lung research breeding colony. We define the impact of breeding conditions on rat fertility and evaluate different methods to diagnose early rat gestation. Effects of nitrofen exposure as well as fetal surgery in terms of prenatal mortality and gross anatomical parameters of lung development are quantified in nitrofen-exposed and -unexposed fetuses from embryonic day 19 to 21 in 12h intervals.
The Study on Dual Fuel Spray and Characteristics of Combustion of Diesel, Natural Gas and Dual Fuel
Abstract:
Combustion of fossil fuels provides around 88% of total energy supply for modern society, and meanwhile causes many environ mental problems and social problems such as air pollution and energy crisis. Therefore，both at home and abroad are focusing on the research and development of natural gas engine recently. However, the mass production and application of this kind of engine are restricted by some unsolved technical difficulties. This paper explored the injection, combustion and emission processes of diesel/ natural gas and dual fuel engine based on Chemkin II, Fire software and Schlieren method. The experimental study on the mixing process of dual fuel jet was carried out by using high-speed Schlieren method in a constant volume bomb. Based on the Fire software, and then applied to Chemkin II software to analyze the effect of the initial temperature and pressure on the net heat production and combustion emissions. The results show that Dual fuel mecha...