Dahlia tubers from Berastagi, North Sumatra, are plants that contain carbohydrates and contain high levels of inulin. Inulin is very good as a dietary fiber and has other physiological functions such as lowering blood sugar and blood fat, anticancer, regulating intestinal microbial flora, increasing absorption of minerals and vitamins. Currently, the utilization of dahlia tubers is not optimal in the community and is considered as agricultural waste, therefore it is necessary to manage dahlia tubers in producing inulin extract and study the proximate material, considering that previous studies still obtained varying results. This study aimed to obtain inulin extract and its yield value and to measure the proximate material of red dahlia tuber. The extraction method used is based on the solubility of inulin in water at a temperature of 800 C. And precipitation are carried out with 70% ethanol. Proximate examination of the material consisted of water content using the heating method, ash content using the gravimetric method, fat and crude fiber content using the Soxhlet method, determination of protein content using the Macro Kjedhal method, and carbohydrate content using the proximate method using the carbohydrate percentage formula. The results obtained were 48,25% Inulin Flour yield, the proximate results obtained 80,8% water content, 0,36% ash content, 0,33% total fat content, 1,29% crude fiber content, protein content 1,15%, Carbohydrate content 14.6%. From this study, it can be concluded that dahlia tubers contain high carbohydrates and low-fat content, have crude fiber and protein that can be used as low-calorie foodstuffs.

Cystatin C is a 13 kD molecular-weight protein synthesized by all nucleated cells which functions as a cysteine protease inhibitor. Cystatin C is detectable when kidney function decreases due to the excessive accumulation of nephrotoxic substances such as copper. Previous studies have proven that, white turmeric rhizome can act as a nephroprotector agent at a dose of 500 mg/BW. The purpose of this study is compare Cystatin-C marker and serum creatinine as biomarkers in the examination of acute kidney injuries induced by nephrotoxic substance. This was a post-test only controlled experimental study on wistar strain male rats that were divided randomly using simple random sampling approach into three groups; normal control group, treatment control group (Curcumin for 2 weeks followed by CuSO4 for 3 days at each weekend), and CuSO4 pentahydrate control group. This research is conducted at Faculty of Pharmacy and Faculty of Medicine at the University of North Sumatera in May to August 2019. The analysis results is normally distributed and has significant differences in levels of Cystatin-C, creatinine and protein serum due to differences in the treatment of each group where p<0.05. Serum Cystatin-C as a biomarker in this study shows more sensitive in detecting acute kidney damage compared to serum creatinine.

BACKGROUND: Dahlia tuber as the source of isolates in endophytic mold produces Inulinases. Inulinase is used in industry to produce inulin to become fructose through an enzymatic reaction. Fructose from natural substances constitutes low calories used as diet in diabetes mellitus type 2 patients. An important phase is done obtain the inulinase enzyme through mold isolation. AIM: The objective of this research was to isolate and identify the molecular of endophytic mold from red dahlia tuber which had the optimum inulinase activity. METHODS: Mold isolation was done through the stage of surface sterilization and purification. Mold isolation which had the highest inulinase activity was identified in a molecular using the polymerase chain reaction technique with the Internal transcribed spacers ITS region. DNA amplification used primer ITS 1 and ITS 4. RESULTS: The result of the study showed that there was five-mold isolation with the result of screening high inulinase activity found in UD3 (++), UD4 (++), and UD5 (+++), the value of inulinase enzyme activity of UD3 was 0.582716049, UD4 was 0.330864198, and UD5 was 0.685185185. The result of identifying UD5 molecular in eight DNA tapes was successfully amplified with 660 pb. The result of identifying molecular based on BLAST analysis found Schizophillum commune species CONCLUSION: It was found that the highest inulinase activity was the species S. commune, which added new variants of inulinase enzyme from red dahlia tuber which could be used by industry to yield fructose through an enzymatic reaction.

Free radicals can cause various degenerative diseases such as cancer and cardiovascular disease. Flavonoids have antioxidant abilities that inhibit damage from free radicals. The roselle antioxidant mechanism is associated with high flavonoid content. Red and purple roselles are two varieties of roselle (Hibiscus sabdariffa L.) cultivated in Indonesia. The aim of this research was to analyze the differences in flavonoid content and antioxidant activity in the calyces of two varieties of roselle (Hibiscus sabdariffa L.), red and purple. Total flavonoid analysis and antioxidant activity testing were done by spectrophotometry in the visible region. Total flavonoid content was analyzed by pretreatment with aluminium chloride and sodium acetate. Antioxidant activity was tested with 2,2-diphenyl-1-picrylhydrazyl. The total flavonoids for both red and purple roselle calyces ethanolic extract were 27.55 and 39.18 mg quercetin equivalent per gram. The half maximal inhibitory concentration values obtained for both red and purple roselle calyces ethanolic extract a were 51.59 and 42.17 μg/mL. The total flavonoid content and antioxidant activity of purple roselle calyces ethanolic extract was higher and stronger than red roselle calyces ethanolic extract.

Inulin is a type of polysaccharide that is commonly found in nature derived from the dahlia tuber plant, and other plants such as chicory, Jerusalem artichoke, Yaco´n potato and asparagus. Inulin is widely used in industry and pharmaceuticals. In the industrial world, inulin is used as a source of natural sweetener, enhances the taste of food, ferments, and is a low-fiber food source. While in the pharmaceutical world, inulin can be used in several studies, one of which is as an anti-diabetic. This study aims to determine the potential of dahlia tuber inulin as an anti-diabetic. The type of research is a narrative review. Search data using three databases, namely Elsevier (SCOPUS), Pubmed and Google Scholar with a limitation of the last 10 years of articles with the keyword "inulin for diabetes", with the PRISMA method. The results showed that inulin works on glucose absorption in the intestine, lowers blood sugar levels, lowers hemoglobin A1c, increases circulating GLP-1, reduces hyperglycemia, reduces insulin resistance (IR) and hyperlipidemia, reduces oxidative stress, increases insulin and leptin levels, facilitates glucose transport of GLUT4 by activating the PI3K/Akt pathway, is anti-inflammatory, and is involved in the expression of several anti-hyperglycemic genes. The conclusion is that dahlia tuber inulin has an anti-diabetic effect.