Synthetic colorants used for dye and mordant purposes in textile industries are currently causing environmental problems in the world. The usage of these synthetic colorants is a major health problem ...and harms the environment. For this reason, synthetic colorants should be replaced by natural colorants. Therefore, this study aimed to extract natural dye stuff from spent coffee ground and bio-mordant from mango bark. The raw materials were collected, washed, dried, crushed and their physico-chemical properties were determined. Finally, the samples were extracted by using the solvent extraction method. During the extraction process, the central composite design method (CCD) was used to analyze and optimize the effect of dosage (g/l), temperature (℃) and time (min). The maximum natural dye yield value of 18.41% was obtained at a dosage of 60 g/l, temperature of 70°C and time of 90 min. Also, the highest natural mordant yield of 19.03% was achieved at the value of 45 g/l, 70°C and 90 min. The fastness properties of dyed and mordanted cotton fabric results were within a range of acceptable standard values. Therefore, using spent coffee grounds for natural dyes and mango bark for natural mordant can be a feasible commercial alternative to synthetic dyes in textile and dyeing industries.
Wastewater treatment with chemical coagulants has a variety of drawbacks, including sludge management, cost, concerns for human health, and environmental pollution. In light of this, a study was ...conducted to determine whether banana plant stem (Musa acuminate) made coagulant can effectively reduce turbidity (NTU) of wastewater. In this study, conventional extraction method was used to extract the coagulant from the banana plant stem by using NaCl (0.1, 0.5, 1 M) solvent. After extraction, the coagulation efficiency of each produced coagulant was computed in terms of their turbidity removal efficiency (%) from sampled wastewater. The sampled wastewater had an average turbidity value of 893 NTU. Response surface methodology (RSM) and central composite design (CCD) were used to study the effects of NaCl solvent concentration (M), extraction time (min), and particle size (mm) on the coagulation efficiency (%) of the extracted coagulant. In addition, the coagulant was characterized such as FTIR analysis, point of zero charge value determination, and inulin compound presence analysis. From all prepared coagulants, the maximum coagulation efficiency obtained was 86.3% at the optimum conditions, such as 0.55 M (NaCl) of solvent concentration, 1.25 mm particle size, and 20 min of extraction time. The characterized coagulant had 6.2 points of zero charge value and also had various types of functional groups. Based on the findings of this study, it can be said that the coagulant prepared from banana stems (Musa acuminate) was an efficient natural coagulant that could be applied to treat wastewater.
Client satisfaction towards the pharmacist services is essential to measure the level of pharmacy services offered to clients and the implementation of pharmaceutical care in the hospital.
A ...cross-sectional study was conducted to assess client satisfaction towards the pharmacist service from April 20 to 30, 2019 at OPD pharmacy of Tikur Anbessa Specialized Hospital (TASH). Clients fulfilling the inclusion criteria were interviewed by using a five scale Likert scale. Then data was entered and analyzed using SPSS version 21. The results of the study were presented using table, frequency, and percentage. A binary logistic regression was also employed. The association was declared at p<0.05.
In this study 250 study participants were included. Majority of the participants were males (56.4%, n = 141) with the mean (±standard deviation) age of 38.97±13.73. The mean satisfaction was 51.6%. Study participants perception on pharmacy staff number insufficiency (AOR = 0.32, 95%CI: 0.17, 0.59) and their perception towards the waiting area scored as somewhat fair (AOR = 0.50 (0.27, 0.94) and not convenient (AOR = 0.18 (0.06, 0.56) were negatively associated with their satisfaction.
In this study, study participants have an overall satisfaction of above 50%. Respondent satisfaction for pharmacist approach or communication skill was higher than their satisfaction towards the medication guidance given to them. Study participants perception of the waiting area and staff number sufficiency for the service were significant predictors of their satisfaction. Hence, the TASH administration is expected to improve such pharmaceutical service areas to meet patient demands.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
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