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Takaras River is a river basin that is vulnerable to pollution, particularly from the mercury usage in small-scale gold mining. This study aims to identify water quality based on mercury (Hg)and pH levels in the Takaras River. Samples were taken at two locations using a purposive sampling method. Results showed indications of mercury use on former gold mining land around the Takaras River altought the mercury content level was below 0.075 µg/L or 0.00075 mg/L in sample 1 and 2. Based on the test results, the acidity level (pH) in the two water samples from Takaras River is 3.86 and 3.84 in sample 1 and 2, compared to the maximum pH quality standard of 6-9 for Class II water, it is concluded that the scale of acidity in Takaras River is very low, indicating that the water quality in the Takaras River is highly acidic, abnormal, and shows signs of serious pollution. The implications of low pH levels in the Takaras River can cause damage to the Takaras River ecosystem, a decline in soil quality and fertility, and an increase in heavy metal toxicity in the environment surrounding the river.

This study aims to evaluate the level of heavy metal pollution and the potential ecological and human health risks in the waters of Selangan, Bontang City. The research focuses on analyzing the concentrations of iron (Fe) and mercury (Hg) in sediment, considering that both elements are toxic, persistent, and capable of bioaccumulating within the food chain. The study was conducted over six months, from January to June 2023, at four sampling stations representing the environmental conditions of Selangan waters. The methodology included sediment sampling, sample preparation through drying and grinding, and laboratory analysis using Inductively Coupled Plasma–Optical Emission Spectrometry (ICP-OES) to determine Fe concentrations. The results were then compared with quality standards established by the Washington Annotated Code 173-204-320 and Indonesia’s National Agency of Drug and Food Control (BPOM) Regulation No. 5 of 2018. The findings indicate the presence of heavy metal contamination across all sampling stations. Fe concentrations ranged from 2.35 mg to 6.308 mg, significantly exceeding the permissible limit of 0.3 mg/L. Meanwhile, Hg concentrations ranged from 0.015 mg to 0.028 mg, also surpassing the standard threshold of 0.001 mg/L. These results clearly demonstrate heavy metal pollution in the Selangan waters, posing potential threats to marine ecosystem health and coastal communities. Regular monitoring and mitigation measures are urgently recommended to prevent further environmental degradation.

Jam is a paste-shaped food usually made from fruit which is quite popular from children to teenagers. Aloe vera is one of the 10 best-selling plant species in the world which was developed as a raw material in the pharmaceutical and food industries, especially in countries on the European continent. Inulin is a dietary fiber contained in various types of vegetables and fruits that are beneficial for digestive health. Purple sweet potato is used in the addition of jam because purple sweet potato contains vitamin A, B vitamins and antioxidants. The purpose of this study was to determine the concentration of inulin thickener and purple sweet potato extract with high antioxidant activity, and to determine the characteristics of the panelists' preference to jam. This study used a completely randomized design with the first factor being variations in the concentration of inulin as thickener 1, 2, and 3 g. The second factor was the addition of purple sweet potato extract (40, 50, and 60%). The results of this study indicated that the jam formulation with high antioxidant activity on variations in the concentration of 1 g of inulin thickener with the addition of 60% purple sweet potato extract. The jam formulation that was preferred by the panelists was found in variations in the concentration of 2 g of inulin with the addition of 40% purple sweet potato extract which had an overall value of 3,40 (neutral). Higher purple sweet potato extract, the higher the antioxidant activity of the jam. Purple sweet potato extract can be used as a source of antioxidants in jam making.

Mochi is a cake made from glutinous rice flour with other ingredients and then steamed. White sweet potato flour is used as a substitute because it contains high levels of fiber, with the addition of elephant ginger extract, which is expected to be able to neutralize the unpleasant taste and scent of white sweet potato flour. The aim of this study was to determine the right formulation in order to obtain white sweet potato flour substitution mochi and a high concentration of elephant ginger extract. This study used a completely randomized design (CRD), which consisted of two factors, namely the concentration of glutinous rice flour and white sweet potato flour (90:10, 80:20, and 70:30) and the percentage of elephant ginger extract (to 100 ml of water) (1.5%, 3%, and 4.5%). The best results of the chemical analysis were white sweet potato flour 30 g and ginger extract 4.5%, with a moisture content of 23.66%, an ash content of 0.25%, a total sugar content of 7.64%, and fiber of 2.60%. Based on the results of the physical analysis, the colour L*47.62 (bright brown), a* -4.68 (slightly green), b* 12.20 (yellowish) and a hardness value of 8.90 N, gumminess of 6.27 N, chewiness of 1.73 N, cohesiveness of 0.71 N, and adhesiveness of 1.17 N. Mochi with white sweet potato flour substitution and concentration of elephant ginger extract can be a nutritions food and a source of fiber.

Nata de corn is nata made from corn. Corn contains the element carbon which can fulfill the needs of Acetobacter xylinum in the formation of nata. This study used corn extract to replace coconut water and used natural nitrogen sources from mung bean sprout extract, soybean sprout extract and cowpea sprout extract. The aimed study to determine characteristics of nata  which the thickest and highest fiber. This study used factorial RAL, with 2 factors, namely factor 1 was the percentage of corn extract (10%; 20% and 30%) and factor 2 was the variation of nitrogen sources (mung bean sprout extract, soybean sprout extract and cowpea sprout extract). The purpose of this study was to determine the physicochemical characteristics of Nata de corn and determine the best formulation for Nata de corn. The results of the best treatment formulation in the manufacture of Nata de corn were 30% corn seed extract formulation with 7.5 ml soybean sprout extract, 2.05% crude fiber chemical characteristic test, 0.15% total sugar and 0.97% water content. The resulting nata de corn has organoleptic characteristics of a yellowish-white color with a value of 1.95; less elastic with an elasticity value of 2.06 and slightly springy with a value of 2.72. The results of physical observations with a thickness of 0.72 cm, a weight of 599.8 grams and a volume of 4 ml of fermented residual liquid. Nata de corn has the potential to be a source of food fiber.

Mercury is a highly toxic and bioaccumulative heavy metal. Despite its prohibition, mercury is still frequently found as a contaminant in cosmetic products, particularly in whitening products. This article aims to review and present various findings from previous studies on mercury levels in cosmetic preparations marketed in Indonesia, analyzed using the Atomic Absorption Spectrophotometry (AAS). The method employed is a literature review of scientific articles published between 2015 and 2025, selected based on their focus on mercury analysis in cosmetics use of the AAS method. The review results show that the majority of whitening creams and lotions contain mercury levels exceeding the safety limits set by the Indonesian National Agency of Drug and Food Control (BPOM RI), with some samples showing extremely high concentrations reaching thousands of ppm. In contrast, other preparations such as powders, hair dyes, and deodorants generally have low or undetectable mercury levels. These findings indicate a lack of understanding regarding mercury and its dangers, especially regarding compliance with regulations on cosmetic products, especially those sold online. The conclusion of this review emphasizes the need for enhanced regulatory enforcement, stricter supervision, and increased public education to protect consumers from the health risks posed by mercury-containing cosmetics.

This community servis aims to improve the skills of the people of Giriwoyo village, Wonogiri, through training in the creation of local corn food. The methods used include practical training and demonstrations on making various processed corn-based products, such as cakes and snacks. Apart from that, this activity also succeeded in creating awareness of the potential of corn as a food source with economic value. It is hoped that participants can utilize the skills acquired to develop small businesses, increase income, and contribute to the welfare of local communities.

A traditional cake from Betawi known as kembang goyang is created by shaking it in hot oil until the dough releases from the mold and gets its name from the way it looks budding flowers. In this study, rice flour substitute with mocaf flour and several types of milk were also used. This studied aims to manufacture kembang goyang that are rich in protein, and the optimal of crunchiness, this study attempts to establish the ideal ratio of rice flour to mocaf flour and different types of milk. This study was carried out utilizing a factorial Completely Randomized Design (CRD) consisting of two factors, namely the ratio of rice flour to mocaf flour (30%: 70%, 40%: 60%, 50%: 50%) and variations in the type of milk (goat's milk, cow's milk and soy milk). Kembang goyang substitutions50% rice flour: 50% mocaf flour with the soy milk variation had moisture content of 0,83%, ash 0,78%, fat 41,36%, protein 6,06%, carbohydrate 51,99%, broken white 1,72%, slightly milk 2,84%, milk smell 3,12%, crispy 3,77. Kembang goyang is a substitute rice flour with mocaf flour and a variation of milk that are rich in protein so it has the potential to be  a healthy and nutritious food.

Indonesia is rich in biodiversity, there are around 40,000 species of plants, and they have different uses,such as traditional medicine, can be made into handicrafts, used as decorations, used as natural dyes. Butterflypea flowers have the potential as a natural dye because the anthocyanins contained in their petals emit a bluecolor. The purpose of this study was to determine the anthocyanin content in butterfly pea flowers using themaceration extraction method which is commonly used to determine the best anthocyanin concentration. Thisstudy used a completely randomized factorial design (CRD), namely drying time, (fresh, 1, 2 days) andmaceration temperature (50, 60, 70oC), so that 9 combinations were obtained and each treatment was repeatedtwice. The results of this study indicate that the longer the drying time and the higher the macerationtemperature, the higher the levels of anthocyanin, total phenol, and the darker the color. The researchconducted showed that the best treatment combination was the drying time of 2 days with a macerationtemperature of 70°C to produce butterfly pea flower extract which had antioxidant activity of 54.66%, totalphenol 4.16 KTF (mgGAE/g), anthocyanin 123.48 mg/g, pH 6.03. Color sensory test analysis was 4.5 andwater content of butterfly pea flower was 10.79%. The optimal drying time and maceration temperature willproduce high total phenol and anthocyanin levels. Butterfly pea flowers have high levels of anthocyanins, sothey have the potential to be studied further. 

Stick is a tasty, healthy, and high-protein snack. Goat milk less optimised due to the assumption that goat's milk smells like a goat, so most people don't like to consume it. Tofu is used as a addition for sticks, because tofu is a food that contains the best non-animal protein. The research was purposed to increase  consumption of goat milk and white tofu by processing it into milk sticks. In addition, it can also produce milk sticks that are rich in protein and liked by panellists. The experimental design used was a Completely Randomized Disign (CRD) with the first factor being the ratio of curd goat milk and tofu (60%:40%, 50%:50%, 40%:60%) and the second factor being the ratio of wheat flour and tapioca starch (40%:60%, 50%:50%, 60%:40%). The results showed that the substitution of goat milk curd and tofu and the ratio of wheat flour to tapioca starch had a significant effect on characteristics of the milk stick. The best product from several stick formulations in terms of chemical, physical and organoleptic properties is the stick formulation with 60% etawa goat milk curd: 40% white tofu and 60% wheat flour: 40% tapioca starch has a high protein value of 11.51% with a moisture content of 2.27%, ash content of 1.94%, fat content of 32.51%, carbohydrate content by different 51.78%, while etawa goat milk curd sticks with white tofu substitution which has overall level of preffered value of panellists is found in the ratio 3.39 (preferred). Stik  from curd protein of etawa goat milk with white tofu be a potensial source of  protein.

Kombucha is one of the processed products of fermented sugar and tea with a starter mixture ofkombucha culture called SCOBY (Symbiotic Cultures of Bacteria and Yeast). Kombuchafermentation is carried out using yeast and bacteria microorganisms. Pomegranate or often calledpomegranate is a fruit that has quite high antioxidants. The purpose of this study was to determinethe characteristics of pomegranate juice kombucha with variations in concentration andfermentation time which have high antioxidant activity. This study used a factorial randomizeddesign with two factors and two repetitions. The factors used were variations in the percentage ofpomegranate juice (30%, 40%, and 50%) and fermentation time (7 days, 9 days, and 11 days). Thebest chemical and organoleptic analysis based on the highest antioxidant activity was 50%pomegranate juice treatment and 9 days of fermentation time with 71,10% antioxidant activity,total phenol 9,04 GAE/L, reducing sugar 2,45%, total acid 1,35%, pH 3,1 , anthocyanin 53.52%,lightness (L*) 44.72 , redness (a*) 5.15, yellowness (b*) 2.57, fruity aroma 2.27, sour taste 2,85, andfor overall preference 3,49 for the treatment of adding 50% pomegranate juice and 9 days offermentation time. Pomegranate extract able to improve activity of antioxidant for kombucha. 

Putu ayu was traditional Indonesian caked with a soft texture that was a sweet and dominant colour of green. Wheat flour in Indonesian was grew used, so local materials need to be developed to reduce their dependence on wheat flour. This studied aimed to determined of soy flour and extract of katuk leaves which had high antioxidant and preferred consumer. This studied used was two factor Completetly Randomized Design (CRD) with ratio wheat flour and soybeans flour (90:10), (80:20) and (70:30) and extract concentration katuk leaves 10%, 15% and 20%. Putu ayu caked the best treatment was on ratio wheat flour and soy flour (70:30) with extract katuk leaves 15% because had high antioxidant activity 18,35%, aw moistured content 44,99%, ash content 8,35%, total fat 3,53%,8,59% protein, and 9,18% fiber. Soy flour substitutions and the addition of katuk leaves had the potential to increased the protein level of the putu ayu caked.

Mercury (Hg) is illegally used in cosmetics as a skin whitener because it can inhibit the formation of melanin, but it poses health risks as it can accumulate in the body. The use of mercury-containing whitening lotions can cause serious side effects. This study aims to identify the presence of mercury in handbody lotion sold in online shops in Central Java without BPOM approval. The method used is Descriptive Qualitative with a color reaction test. The results show that out of 6 samples tested, samples A, B, C, D, and E were mercury-negative, while sample F tested positive for mercury based on two tests, namely the Rapid Test Kit and the Amalgam formation test.

This research studies consumer protection against the dangers of using mercury skincare for health, so that consumers, especially women, can be more careful in choosing and using skincare. Mercury is an ingredient that is often added to skincare ingredients that function to produce white facial skin quickly. Mercury can flow through the blood throughout the body which can cause death. However, many consumers among women are more easily tempted to use mercury-based skincare because they see instant results. Skincare made from mercury is strictly prohibited from use because of its content which can cause damage to organs and nerves of the body by a substance such as chemicals and cause abnormalities in the functioning of the health system. The purpose of this study is to analyse consumer protection against cases of skincare products containing mercury such as the case of lightening cream and night cream brand MH.    

People's mining activities in Gamey Village, Uwapa District, Nabire Regency, Central Papua Province are carried out to meet daily needs and improve the welfare of the local community. This mining activity is based on alluvial deposit conditions and is applied for mining sediments on the surface and using alcon machines. for high pressure water spray. This community mining activity is divided into several stages starting from preparation of mining land, processing and production processes as well as selling gold products for sale. This research aims to examine the gold processing used by small-scale miners in Uwapa District, Gamey Village, and its impact on the environment and public health. The main focus of this research is on the use of the sluice box method, which is the gold processing technique most commonly used by local communities. This method was chosen for its simplicity and low cost, although the gold recovery efficiency varies between 50-70%. Additionally, this research evaluates alternative technologies such as shake tables and centrifuges that can increase gold recovery efficiency and be more environmentally friendly. The research results show that the implementation of alternative technology requires training, procurement of adequate equipment and infrastructure as well as ongoing monitoring. By adopting better technology, it is hoped that gold mining activities in Gamey Village can run more productively and sustainably, improving community welfare without damaging the environment.

The purpose of this study was to determine the results of the analysis of heavy metal levels of Pb, Cd, Hg found in lettuce in the Central market of Gorontalo city. In this study, the object of research was the roots, stems and leaves of lettuce. The method used was wet deconstruction method using a mixture of HNO3 and HCl. After that the solution was cooled, then filtered. The sample solution that has been deconstructed is analysed by UV-Vis Spectrophotometry. The results of the analysis showed that there was heavy metal Pb in the root, stem and leaf lettuce samples of 2.54 mg / kg, 1.58 mg / kg, 2.28 mg / kg / respectively. Cd heavy metal levels of 0.07 mg/kg, 0.60 mg/kg, 0.65 mg/kg. Hg heavy metal levels of 2.09 mg/kg, 0.21 mg/kg, 0.44 mg/kg. Based on the 2018 Food and Drug Administration regulations, the value of Pb metal content is 0.20 mg/kg, the value of Cd content is 0.05 mg/kg, and the value of Hg content is 0.03 mg/kg.

Velva, a kind of frozen dessert, made from fruit that contains nutrients and help the body's metabolic processes as a source of energy. Red dragon fruit (Hylocereus polyrhizus) is used in the production of velva in order to get a good color and Moringa to increase antioxidant activity.  The purpose of this study was to determine the appropriate substitution ratio between velva, dragon fruit, moringa leaf extract, and stabilizer to produce dragon fruit velva with good characteristics, namely high antioxidant and preferred by consumers.  This study used a factorial completely randomized design (CRD).  The factors used were the concentration of Moringa leaves (8, 10, 12 g) and the concentration of the type of stabilizer (CMC 1,26%, cornstarch 1,26%, carrageenan 1,26%).  The best chemical analysis was treatment concentration of carrageenan stabilizer 1,26% with the addition of 8 g Moringa leaf extract with antioxidant activity 16,85%, crude fiber 0.63%, vitamin C 4,33%, reducing sugar 11,83%, total phenolic 13,93mg.GAE/ml and pH 3,5.  Physical analysis with melting power 47.00 minutes/hour, overrun 13,00%, TPT 4˚Brix and TAT 1.14%.  The results of the red dragon fruit velva sensory test with various types of stabilizers and the addition of Moringa leaves, as well as the combination of treatments between the two had no significant effect on color, texture, taste, aroma and overall preference.  The best organoleptic analysis was the P3K1 treatment (concentration of carrageenan stabilizer 1,26% with the addition of 8 g Moringa leaf extract) with a color value of 3.06, taste 2.57, aroma 2.78, texture 3.50 and overall preference 3,42.

Velva is frozen food product has low fat and made from crushed fruit or vegetables that has a similar texture like ice cream. Sweet potatoes used as a raw material it is an innovation of food processing to increase economic value. The addition of kecombrang extract creates a new taste and has a lot of nutritional content such us high antioxidant. The research of objective is to determine the characteristic of velva varietas of sweet potatoes and addition of kecombrang flower extract based on longest melting power and highest total dissolved solids. The research using completely randomized with 2 factorial. First factor is type of sweet potatoes ( white, orange, purple) and second factor is addition of kecombrang flower extract (5%, 10% and 15%). The results of chemical (moisture content, antioxidant activity) and physical parameters (overrun, melting time and total dissolved solids) based on longest melting power and highest total dissolved solids formulation is purple sweet potatoes and 15% kecombrang extract is water content 67,37%, antioxidant 74,24%, overrun 22,18%, melting time 18,54 minutes, total dissolved solids 25,7oBrix. Based on the most preferred organoleptic paramaters is purple sweet potatoes and 5% kecombrang extract is water content 69,09%, antioxidant 66,41%, overrun 23,79%, melting time 17,28 minutes, total dissolved solids 23,6oBrix

Yangko cake is a semi-wet food made from glutinous rice flour with the addition of a sugar solution. In order to improve the characteristics of the yangko cake, an ingredient is added, namely kidney bean flour and cinnamon extract. Kidney beans are one type of legume that has a high protein source so it can add nutritional value to food products. Kidney bean has an unpleasant taste, therefore it needs to be balanced with the addition of cinnamon extract, which is expected to reduce the unpleasant flavor of the yangko cake which consumers preferred. The experimental design used is a CRD, with the first factor being the ratio of glutinous rice flour and kidney bean flour with a ratio of 90:10, 80:20, and 70:30. The addition of cinnamon extract in various amounts (2 ml, 4 ml, and 6 ml) was the second element. The inclusion of substitute glutinous rice flour and kidney bean flour, coupled with the variation of cinnamon extract produced yangko cake with 3,80% fiber content and 5,76% protein content.  Chemically, physically and organoleptically, the best product from several formulations of the yangko cake was with 70:30 of glutinous rice flour to kidney bean flour and 6 ml of cinnamon extract, with 47.98% water content, 0.66% as content, 31,36% total sugar content and with a hardness of 28.82 N, a gumminess of 4.92 N, a chewiness of 2.28 N then a cohesiveness of 0.64 Ns.  The organoleptic characteristic of the yangko cake was the most preferred by the panelists, with a value of 3,76 (preferred). The yangko cake substitusion of glutinous rice flour and kidney beans with the addition of cinnamon extract is a food ingredient  that has quite high protein and fiber.

Nugget is processed mashed meat. Several types of fish such as tuna, tilapia, and snapper have the potential to increase sales value and can be used as raw material for nuggets, because apart from having quite high proteins, they also have thick flesh. Carrot flour has high levels of fiber and also high levels of beta-carotene. The purpose of this study was to determine the characteristics of fish nuggets which were high in fiber and beta-carotene with variations in the addition of carrot flour, tapioca flour and to find out the highest level of preference for fish nuggets. research using a completely randomized design (CRD) 2 factors with a comparison of carrot flour and tapioca flour and variations of fish species. The best chemical test results were the comparison of carrot flour: tapioca flour (40%:20%) with tuna fish with beta-carotene content of 6.69 μg/g, crude fiber content of 36.54%. The highest preference sensory test result is the comparison of carrot flour with tapioca flour (40%: 20%) with the type of tilapia meat with a color test result of 3.14 (likes), taste test 3.18 (likes), aroma test 3.20 (likes), texture test 3.29 (likes), and overall preference test 3.82 (likes). ). Fish nuggets made from tapioca flour and carrot flour can be a food that has high levels of crude fiber and beta-carotene.