Gelatin Properties of Goat Skin Produced by Calcium Hydroxide as Curing Material

Application of strong bases as curing materials has been widely applied in commercial gelatin industries, but the application of weak bases has not been much done. Application of strong bases as a treatment was not economical and assumed to affect human health. Studies were conducted on the properties of goat skin gelatin manufactured using weak base types of Ca(OH)2 and then compared with properties of commercial gelatin. Skins from Bligon goats of 1.5 to 2.5 years old was used as the raw materials and Ca(OH)2 100 g/l as curing materials. The 2x3 factorial completely randomized design (CRD) with three replications was used as a design study. Two curing times (2 and 4 days) and three concentrations (3, 6, 9% v/v) were used as treatments, and commercial gelatin (pure (P) by Merck, food grade (Fg) and pharmacy standards (Ps)) were used as control. Gelatin produced from goat skins using Ca(OH)2 had properties similar to that of commercial gelatin. The heavy metals (Pb, Cu and Zn) contained in goat skin gelatin still meet the INS standards. The optimum production of gelatin has been generated through the application of 4-day curing time at a concentration of 9% (v/v)

The Effect of Curing Process in Acetic Acid on the Gelatin Properties of Blingon Goat Skin

Bligon goat is a cross between Kacang with Ettawah goat. The skin of Bligon goat contains collagen protein compounds that have the potential to be processed into gelatin. Curing process is necessary to improve the properties of gelatin both quantitative and qualitative. The purpose of this study was to identification of the best process time and level of acetat acid as curing materials of Blingon goat skin. The skin of male Bligon goat age ±1.5-2.5 years of old and acetic acid (CH3COOH 0.5 M) were used as material. The experiment was run according to completely randomized design (CRD) with factorial pattern of 2x3 and three replications for each treatment. Two processing time (48 and 96 hours) as first factor and three concentrations levels of acetic acid (3, 6 and 9%, v/v) as the second factor. The data were analyzed by analysis of variance. Yields, gel strength and viscosity were used as parameters. The results of this study showed that the processing time up to 96 hours and level of concentration up to 9% significantly affected (P<0.01 ) gel strength, but no significantly on the yields and viscosity. The combination of processing time of 96 hours with concentration level of 3% gave the best results compared to others

Gelatin Properties of Goat Skin Produced by Calcium Hydroxide as Curing Material

Application of strong bases as curing materials has been widely applied in commercial gelatin industries, but the application of weak bases has not been much done. Application of strong bases as a treatment was not economical and assumed to affect human health. Studies were conducted on the properties of goat skin gelatin manufactured using weak base types of Ca(OH)2 and then compared with properties of commercial gelatin. Skins from Bligon goats of 1.5 to 2.5 years old was used as the raw materials and Ca(OH)2 100 g/l as curing materials. The 2x3 factorial completely randomized design (CRD) with three replications was used as a design study. Two curing times (2 and 4 days) and three concentrations (3, 6, 9% v/v) were used as treatments, and commercial gelatin (pure (P) by Merck, food grade (Fg) and pharmacy standards (Ps)) were used as control. Gelatin produced from goat skins using Ca(OH)2 had properties similar to that of commercial gelatin. The heavy metals (Pb, Cu and Zn) contained in goat skin gelatin still meet the INS standards. The optimum production of gelatin has been generated through the application of 4-day curing time at a concentration of 9% (v/v)

Cambios en el flavor debidos al efecto de diferentes materiales de envases en almacenamiento de aceite de semilla de algodón, aceite hidrogenado y margarina.

Bleached cottonseed oil, partially hydrogenated palm oil and margarine were packed in metal cans and white plastic bottles and stored for seven months at room temperature on side bench. Assessment of the stability of the oils towards flavour deterioration was reported. The deterioration of flavour developed from bleached cottonseed oil, partially hydrogenated palm oil and margarine was observed due to increase amount of aldehydes and ketones which play an important role in deterioration of the oils. From the results we found metal can offered suitable and better protection against deterioration than plastic package for cottonseed oil, partially hydrogenated palm oil. While plastic container was better for storing margarine and this is due to the presence of water and salt in margarine where they compose about 16% and 2% respectively.Aceite de semilla de algodón decolorado, aceite de palma parcialmente hidrogenado y margarina fueron envasados en latas metálicas y botellas de plástico blancas y almacenados durante siete meses a temperatura ambiente en estantes. Se relacionó la evaluación de la estabilidad de los aceites con la deterioración del flavor. La deterioración del flavor producida en aceite de semilla de algodón decolorado, aceite de palma parcialmente hidrogenado y margarina fue observada debido al aumento en la cantidad de aldehídos y cotonas que juegan un importante papel en la deterioración de los aceites. A partir de los resultados obtenidos se encontró que las latas metálicas ofrecieron una adecuada y mejor protección frente a la deterioración que los envases de plásticos para aceite de semilla de algodón y aceite de palma parcialmente hidrogenado. Por otra parte, los recipientes de plástico fueron mejores para el almacenamiento de margarina y esto es debido a la presencia de agua y sales en ella en una proporción del 16% y 2% respectivamente

Implementasi Pembelajaran Hands on Activities Untuk Meningkatkan Sikap Terhadap Sains Pada Siswa SMP

Abstrack : This research aims to determine the increase attitudes toward science of students in physic learning by the implementation of hands on activities in class VIII SMPN 20 Pekanbaru. The subjects are students of class VIII3. This class has fewer than 39 students. The data collection instrument in this study is questionnaire of attitudes towards science which consists of 37 statements. Analysis of the data in this study is a descriptive analysis using the gain (increase). If G > 0.3, so the attitude towards science of student is increase by the implementation of hands on activities. The results of all indicators showed: Gain student's attitudes toward science for indicator fun science is 0.09 with a low category, classroom or teacher is 0.08 with a lower category, self directed efforts is 0.14 with a low category, anxiety toward science is 0.16 with a lower category, family model is 0.15 with a low category. So that the average gain attitudes toward science of students in the amount is 0.12 to a low category. Application of hands on activities of material pressure have a low gain to improve attitude science of students in class VIII3 SMPN 20 Pekanbaru

Responsibility Parking Service Business to the Protection of Consumer of the Parking Services in Makassar

The development of dynamic human behavior will lead to more complex contractual relationships. A contractual relationship that occurs must necessarily be accompanied by certainty and legal protection for each party. Existing regulations should serve as guidelines for contractual relationships. Parking business practitioners and parking service users must understand and know the rights and obligations of each. The form of liability which must be fulfilled by each party shall be adhered to in order to create a good contractual relationship and the fulfillment of rights and obligations based on the prevailing laws and regulations. This research is research with qualitative type with the socio-juridical approach. This study responded the ineffectiveness of the accountability of parking service business actors (PD Parkir Makassar Raya) to the consumer protection of parking service users because there is still a standard clause on the parking ticket. Makassar City Local Government needs to provide direct supervision on policies issued by PD Parkir Makassar Raya and revise the Local Regulation on Parking Management in order to be relevant to the provisions of the higher Legislation (UUPK). Parking service users are also required to increase legal awareness to know what rights and obligations of service users and parking service business actors

Comparison of Xpert GBS v. culture for rapid detection of group B streptococcus in pregnant women: Sensitivity, specificity and predictive values

Background. Group B streptococcus (GBS) is a leading cause of invasive disease, particularly in newborns. Seventy-five percent of neonates will be colonised by mothers carrying the organism. Confirmation of maternal colonisation with GBS is essential for prompt treatment and prevention of neonatal sepsis. The current gold standard of culture for isolation of GBS has a disadvantage of long turnaround time (24 - 72 hours). Rapid assays are required to determine maternal carriage of GBS.Objectives. To determine the usefulness of the Xpert GBS technology v. culture methods to detect GBS carriage in pregnant women.Methods. This was a prospective observational study of 284 pregnant women between 26 and 37 weeks’ gestation. Two vaginorectal swabs were collected from each participant. One swab was processed using the gold-standard culture method, while the second swab was processed using the Xpert GBS assay. The performance of the Xpert GBS assay was then compared with that of the culture method.Results. Two swabs were processed from each of 284 pregnant women between 26 and 37 weeks’ gestation. Culture detected 70 GBS isolates from a total of 279 specimens (25.1%), whereas the Xpert GBS detected 66 positive specimens (23.7%). The Xpert GBS assay had a sensitivity of 87% and specificity of 98%, with a positive predictive value of 92% and a negative predictive value of 96%.Conclusions. The Xpert GBS assay is a rapid and sensitive tool for prenatal detection of GBS. The assay should ideally be available in every labour ward, where women can be screened for GBS on arrival

Charge excitations associated with charge stripe order in the 214-type nickelate and superconducting cuprate

Charge excitations were studied for stipe-ordered 214 compounds, La$_{5/3}$Sr$_{1/3}$NiO$_{4}$ and 1/8-doped La$_{2}$(Ba, Sr)$_{x}$CuO$_{4}$ using resonant inelastic x-ray scattering in hard x-ray regime. We have observed charge excitations at the energy transfer of 1 eV with the momentum transfer corresponding to the charge stripe spatial period both for the diagonal (nikelate) and parallel (cuprates) stripes. These new excitations can be interpreted as a collective stripe excitation or charge excitonic mode to a stripe-related in-gap state.Comment: 5 pages, 4 figure

The Influence of Forced Convective Heat Transfer on Hybrid Nanofluid Flow in a Heat Exchanger with Elliptical Corrugated Tubes: Numerical Analyses and Optimization

The capabilities of nanofluids in boosting the heat transfer features of thermal, electrical and power electronic devices have widely been explored. The increasing need of different industries for heat exchangers with high efficiency and small dimensions has been considered by various researchers and is one of the focus topics of the present study. In the present study, forced convective heat transfer of an ethylene glycol/magnesium oxide-multiwalled carbon nanotube (EG/MgO-MWCNT) hybrid nanofluid (HNF) as single-phase flow in a heat exchanger (HE) with elliptical corrugated tubes is investigated. Three-dimensional multiphase governing equations are solved numerically using the control volume approach and a validated numerical model in good agreement with the literature. The range of Reynolds numbers (Re) 50 Re 1000 corresponds to laminar flow. Optimization is carried out by evaluation of various parameters to reach an optimal case with the maximum Nusselt number (Nu) and minimum pressure drop. The use of hybrid nanofluid results in a greater output temperature, a higher Nusselt number, and a bigger pressure drop, according to the findings. A similar pattern is obtained by increasing the volume fraction of nanoparticles. The results indicate that the power of the pump is increased when EG/MgO-MWCNT HNFs are employed. Furthermore, the thermal entropy generation reduces, and the frictional entropy generation increases with the volume fraction of nanoparticles and Re number. The results show that frictional and thermal entropy generations intersect by increasing the Re number, indicating that frictional entropy generation can overcome other effective parameters. This study concludes that the EG/MgO-MWCNT HNF with a volume fraction (VF) of 0.4% is proposed as the best-case scenario among all those considered