characterization of chitin and chitosan
An infrared investigation in relation with chitin and chitosan characterization
... Abstract The use of infrared spectroscopy for characterization of the composition of chitin and chitosan covering the entire range of degree of acetylation (DA) and a wide variety of raw materials ... fraction of N-acetylglucosamine) 3.2 Chitin and chitosan analysis In Figs and are given the IR spectra of the two polymers (samples 24 and 1, respectively) with the aim to show the role of the ... independent of the technique and state of the material This evidence supports the use of A1320/A1420 ratio, as being only sensitive to the chemical composition of chitin (or chitosan) irrespectively of...
Ngày tải lên: 24/08/2016, 16:48
Báo cáo "The distribution of peanut-worm (Sipunculus nudus) in relation with geo-environmental characteristics " pptx
... Minh Chau and Vinh Thuc are two exploited flats in offshore islands, affected weakly by land-based sources (sediment and pollutants), surface flat sediments content from 79 to 99% of sand of which ... than 60% of sand Finally, it is impossible to find peanutworms in flats with less than 60% of sand and more than 15% of clay (Dong Xa) Another important factor for living conditions of peanut-worms ... freshwater dilution effect of Tien Yen River Flats in offshore islands as in Quan Lan - Minh Chau and Vinh Thuc areas, the salinity of water always reaches to 2831.5‰ [1] The content of DO in water depends...
Ngày tải lên: 28/03/2014, 15:20
Báo cáo lâm nghiệp: "Changes in Austrian pine forest floor properties in relation with altitude in mountainous areas" pdf
... values of L + F and H layers show a wavy sequence which decreases by the height of 1,500 m and then increases (Fig 2); showing insignificant differences (Table 4) The and max pH values for L + F and ... established between Nt contents (% and g/m2) of L + F layer and altitude are 0.135 and 0.130, respectively (Table 5) While the relation between Nt content (%) of H layer and altitude was insignificant, ... of spatial and temporal variability of inorganic 311 nitrogen in pure and mixed deciduous temperate forests Soil Biology & Biochemistry, 37: 67–79 BRADY N.C., 1990 The Nature and Properties of...
Ngày tải lên: 07/08/2014, 03:22
Learning Approaches in Relation with Demographic Factors
... attendance of female students, and absent students not have the chance to participate in this current study The average age of students was 19.5 with the maximum of 31 and the minimum of 17 The ... related and a student can have a “mixed” approach This corresponds to other study results of Bilgin and Crowe (2008) [2] and Marton and Saljo (1984) [41] However, our study only focuses on maths and ... contrasting groups and contexts European Journal of the Psychology of Education, 15 (2000) 33 [32] Prosser, M., & Trigwell, K., Understanding learning and teaching Buckingham: SHRE and Open University...
Ngày tải lên: 13/08/2015, 10:09
Breast cancer risk in relation to occupations with exposure to carcinogens and endocrine disruptors: a Canadian case–control study pptx
... AR, IL and MG contributed to the concept and design of the study HA-Z and KS co-ordinated the informed consent and referral process from the Windsor Regional Cancer Center and the accessing of tumor ... models and performed the analysis RP, MK, JB, MB, AW and MG interpreted the data and contributed to the writing of the manuscript and all authors participated in revisions of the manuscript and ... Injection molding and related processes take molten mixtures of resins, monomer, multiple additives, and sometimes lamination films, and form them into plastic pieces of defined dimensions and configuration...
Ngày tải lên: 06/03/2014, 02:21
báo cáo hóa học:" General anxiety, depression, and physical health in relation to symptoms of heart-focused anxietya cross sectional study among patients living with the risk of serious arrhythmias and sudden cardiac death" doc
... Department of Public Health and Primary Health Care, University of Bergen, Norway 5Department of Public Health and Primary Health Care, University of Bergen, Norway Department of Public Health and Caring ... to shaping of the article and the editing of the article GEE contributed to the statistical analyses and the editing of the manuscripts KN participated in preparation and the editing of the article ... assessment of physical health which includes both functioning and evaluation of one’s ability to perform physical activity The PCS is standardized for the general population with a mean score of 50 and...
Ngày tải lên: 20/06/2014, 15:20
Báo cáo y học: "Increased levels of circulating microparticles in primary Sjögren''''s syndrome, systemic lupus erythematosus and rheumatoid arthritis and relation with disease activity" pdf
... total), leukocyte and platelet circulating MPs in pSS and other AIDs (SLE and RA) as a biomarker of cell activation Materials and methods Materials and controls The characteristics of all subjects ... expressed as number and percentage and median and range Results for MP levels are expressed as mean ± standard error of the mean Comparisons of mean MP levels, sPLA2 activity, sCD40L and sCD62P concentrations ... between level of platelet MPs and level of anti-double-stranded DNA IgG (r = -0.65, P = 0.003; Figure 4d) and a negative correlation, although not significant, between level of platelet MPs and the...
Ngày tải lên: 09/08/2014, 14:22
Báo cáo y học: "The relation between the incidence of hypernatremia and mortality in patients with severe traumatic brain injury" pptx
... for the presence of daily urinary output above l and for the use of mannitol and hypertonic saline solutions, and created timedependent continuous variates for glucose levels and hyperglycemia ... levels and in the rate of hyperglycemia according to DDAVP use or the presence of hypernatremia (data not shown) Relation between hypernatremia and ICU mortality Patients who died on days and of ... of hypernatremia and the use of DDAVP (data not shown) Page of (page number not for citation purposes) Critical Care Vol 13 No Maggiore et al Table Disorder of water balance over the course of...
Ngày tải lên: 13/08/2014, 16:21
Báo cáo y học: " Near-infrared spectroscopy during stagnant ischemia estimates central venous oxygen saturation and mixed venous oxygen saturation discrepancy in patients with severe left heart failure and additional sepsis/septic shock" potx
... sample size of 41 patients was estimated for a correlation coefficient of 0.6 with a desired power o f0.95 and Page of 10 alpha of 0.01 (SigmaPlot 2004 for Windows, version 9.01 SyStat Software, ... to the splanchnic and renal circulations fall, while flow to the heart and brain is maintained due to redistribution of blood away from the mesenteric and renal vascular beds and additional right ... elbow Severity of disease Sepsis-related Organ Failure Assessment (SOFA) score was calculated at the time of each measurement to assess the level of organ dysfunction [16] Dobutamine and norepinephrine...
Ngày tải lên: 13/08/2014, 20:21
Biomechanics of the tibiofemoral joint in relation to the mechanical factors associated with osteoarthritis of the knee
... years of my study, for their support Of special mention are my collaborators and those who provided valuable advice and critique, Prof Shamal Das De, Dr P Thiagarajan, A/Prof Aziz Nather, Prof Urs ... Biomechanics of the TF Joint - Thambyah A 2004 CHAPTER TWO: Literature Review 2.1 Biomechanics of the tibiofemoral joint In this section the relationships and influences of the anatomy and design of the ... as one or all of three translations and three rotations, and in the knee joint, the combination of translations and rotations describes the degrees of freedom the joint has The tibiofemoral joint...
Ngày tải lên: 12/09/2015, 09:10
Hình ảnh Protocols in relation to the OSI model.doc
... – Call Across WAN May I call 2111 with a bandwidth of 384K? Call flow H.323 RAS signaling yes you can! IP WAN zone zone Admission Control Via Zone BandWidth in the Cisco IOS MCM Gatepeer H×nh4:...
Ngày tải lên: 24/08/2012, 21:11
Báo cáo y học: "Pre-hospital intubation by anaesthesiologists in patients with severe trauma: an audit of a Norwegian helicopter emergency medical service"
... is part of the national HEMS system of Norway, and its primary areas of operation are the mixed urban and rural districts of Rogaland County, which consist of just over 400,000 inhabitants The ... hospital and had a median GCS of (3 - 3) and RTS of 0.0 (0.0 - 0.0) Additionally, 47 patients (16% of all intubated patients) were intubated immediately upon arrival in the ED Page of (Table ... helicopter and RRV are operational day and night The HEMS crew consists of a pilot, a HEMS crewmember and a physician The minimum requirement for HEMS physicians in Norway is years of anaesthesiology...
Ngày tải lên: 25/10/2012, 09:56
Báo cáo khoa học: "Veterinary decision making in relation to metritis - a qualitative approach to understand the background for variation and bias in veterinary medical records"
... categories of perception of the phenomena; 'scoring and recording data on metritis' that relate to the quality of the data that are produced We analyse and build 'a model of understanding' based ... phenomenon of generating score data and decision making in relation to treatment of metritis and their motivation to produce data This information was condensed into a 'model of understanding' that ... data of both high accuracy within-herd and betweenherd Categories of motivation for generating data Four different categories of motivation among the veterinarians for collection and usage of the...
Ngày tải lên: 25/10/2012, 10:45
Báo cáo y học: "Trace Elements, Heavy Metals and Vitamin Levels in Patients with Coronary Artery Diseas"
... and serum cholesterol levels were not significantly different in patients with and without CAD (Table 1) Comparisons of the levels of the vitamins (retinol, tocopherol and cholecalciferol), and ... years have led to a good understanding of their mode of action and why they are essential to life (7) Some studies have assessed the association between iron status and CAD risk but the results ... effects of excess oral exposure of humans to Mn The urine of CAD patients also shows higher Mn concentrations than that of healthy controls (24) In atherosclerotic subjects, the Mn content of the...
Ngày tải lên: 25/10/2012, 10:51
Báo cáo y học: "Effects of p-Synephrine alone and in Combination with Selected Bioflavonoids on Resting Metabolism, Blood Pressure, Heart Rate and Self-Reported Mood Changes"
... fruits of Citrus aurantium [22-25], and is widely distributed in other Citrus species [22, 23, 26] The safety of p-synephrine and bitter orange extract has recently been reviewed [27], and based ... [29] in a double-blinded, randomized, placebo-controlled protocol to compare the effects of p-synephrine alone and in combination with different amounts of hesperidin and naringin on: (1) resting ... blinding of the study The lack of significant differences between the treatment groups and the control group with respect to the self-report ratings of symptoms increases confidence in the safety of...
Ngày tải lên: 25/10/2012, 11:04
Báo cáo y học: "Segment-orientated analysis of two-dimensional strain and strain rate as assessed by velocity vector imaging in patients with acute myocardial infarction"
... sensitivity of 80% and a specificity of 70% (AUC 0.8) with a cut-off value of less than 1.95 cm/s Poor agreement between VVI and TDI measurements have been previously demonstrated, and therefore ... specificity of 87 % was calculated for the detection of infarcted segments (AUC 0.6, confidence interval 0.53 – 0.64) A 111 cut-off value of –10.34% resulted in a sensitivity of 54 % and specificity of ... strain and velocities in comparison to segments with no LE Comparing segments with LE ≥ 51% and LE 1-50% presented a significant difference of tissue velocities (S´ and E´), but not of strain and...
Ngày tải lên: 25/10/2012, 11:15
Báo cáo y học: "Relationship between Anti-CCP Antibodies and Oxidant and Anti-Oxidant Activity in Patients with Rheumatoid Arthrit"
... terms of the mean whole blood and serum antioxidative activity (CAT, GSHpx) and the mean blood and serum MDA and MPO values (oxidative activity), between the patients with anti-CCP(+) and those ... and blood and serum antioxidant defense system (CAT, GSHpx) There were no statistically differences in both groups (anti-CCP(+) and anti-CCP(-)) in terms of blood and serum oxidant activity and ... which appear to be of value for the diagnosis and especially severity of RA [10], and also closely correlated to inflammatory disease activity (Disease Activity Score-DAS28) scores and the presence,...
Ngày tải lên: 25/10/2012, 11:15
Báo cáo y học: "Identification of clinical and simple laboratory variables predicting responsible gastrointestinal lesions in patients with iron deficiency anemia"
... endoscopic and radiographic Asymptomatic colonic and gastric carcinoma may present with IDA and exclusion of these conditions is of prime concern The upper endoscopic evaluation should include random ... yield of endoscopy in patients with IDA and to define predictive factors of gastrointestinal (GI) lesions causing IDA and identify clinical and biochemical variables that predict the outcome of ... presence of dyspeptic complaint and its severity calculated by presence of abdominal pain, abdominal pain with hungry and anxiety, abdominal distension, nausea, vomiting, poor appetite and symptoms of...
Ngày tải lên: 25/10/2012, 11:18