The effect of parigi pineapple (Ananas Sp) juice consumptionon LDL cholesterol level in students of medical faculty, university of Palangka Raya / Efecto del consumo de jugo de piña Parigi (Ananas sp) sobre el nivel de colesterol LDL en estudiantes de la facultad de medicina de la Universidad de Palangka Raya

Excessive consumption of cholesterol could increase the cholesterol level in the blood which is recognized as hypercholesterolemia. LDL (Low-Density Lipoprotein) is a dangerous type of cholesterol particle for the body. A non-pharmacology therapy that could decrease the cholesterol level in the blood is the consumption of Parigi pineapple fruit (Ananas sp.). Three primary contents of Parigi pineapple (Ananas Sp.): Vitamin C, Niacin, and Myricetin could fix the lipid profile. This quasi-experimental research aims to discover the effect of Parigi pineapple juice consumption on the LDL cholesterol level in the Faculty of Medicine Students, University of Palangka Raya. Methods : The design is one group pre-test and post-test with the sample in total of 43 male and female students from batch 2020 Faculty of Medicine, University of Palangka Raya, selected through convenience sampling. The tools are Cobas C111, centrifuge cholesterol-checking devices, and juice-making tools such as knife, scales, measuring cylinder, blender, glass, and gloves. Results: After the consumption of Parigi pineapple juice (Ananas Sp.) for 6 days with the dose of 142 gr/70 kg, the data were calculated using the Wilcoxon test with α = 0.05 and p= 0.000. The average LDL cholesterol level dwindled from 118.7 mg/dl to 102.53 mg/dl. Conclusion: The treatment could be developed as non-pharmacology therapy since it is proven capable of decreasing LDL cholesterol level.(AU)

Lithium recovery from spent Li-ion batteries using coconut shell activated carbon.

Lithium is one of scarce natural resources in the world that need to be preserve. One of the way in preserving the resource is by recovery the rich source of the lithium such as in the spent batteries. It is necessary to develop a recovery method which is efficient and low-cost to be able to recover the lithium in an economic scale. In this study, low-cost activated carbon (AC) from coconut shell charcoal was prepared by chemical and physical activation methods and tested for Li removal from Co, Mn, and Ni ions in semi-continuous columns adsorption experiments. The maximum surface area is 365 m2/g with the total pore volume is 0.148 cm3/g that can be produced by physical activation at 800 °C. In the same activation temperature, activation using KOH has larger ratio of micropore volume than physical activation. Then, the adsorption capacity and selectivity of metal ions were investigated. A very low adsorption capacity of AC for Li ions in batch adsorption mode provides an advantage in column applications for separating Li from other metal ions. The AC sample with chemical activation provided better separation than the samples with physical activation in the column adsorption method. During a certain period of early adsorption (lag time), solution collected from the column outlet was found to be rich in Li due to the fast travel time of this light element, while the other heavier metal ions were mostly retained in the AC bed. The maximum lag time is 97.3 min with AC by KOH activation at 750 °C.