Solang M, Lamondo D, Kumaji SS. 2017. Zinc, calcium, protein, lead, mercury, and the sensorics quality of cireng snacks supplemented with blood cockle (Anadara granosa). Nusantara Bioscience 9: 385-391. Blood cockle (Anadara granosa) is a potential nutritious food with high economic value. This study aims at evaluating the level of zinc, calcium, protein, mercury, lead, and the sensorics quality of cireng (traditional Indonesian snack made from fried-tapioca flour dipped into sauces) supplemented with blood cockle. This study used complete randomised design, where the treatment factors consisted of flour made from blood cockles to supplement the flour used in making the cireng snacks. The concentration of the treatment factors were 0%, 5%, 10%, 15%, and 20%. The data were analyzed using the One Way ANOVA test and LSD test. This study shows that blood cockles’ supplementation significantly increases the level of protein (p=0.05), zinc (p=0.031), calcium (p= 0.016), lead (0.000), mercury (p= 0.022) of the cireng snacks. Supplementation of blood cockles has increased the preference toward cireng’s flavor, aroma, and color by 10%, whereas the level of preference toward the texture of cireng which used the blood cockle has increased by 20% compared to cireng product with non-supplemented flour. The level of lead (Pb), and Mercury (Hg) are below the Indonesian National Standard (SNI). Supplementation of blood cockles from Gorontalo in the flour used in making the cireng snacks produced snacks with a better nutrition value and safe to consume. Also, the flavor, color, texture, and aroma are acceptable.
Blood cockles (Anadara granosa) are filter feeder that can accumulate heavy metals and microbes so that need to pay attention to the maximum intake. The objective of this study was to evaluate the content of Fe, Zn, a total of microbes and maximum tolerable intake value (MTI). The study employed quantitative analysis. The samples were collected from Wonggarasi Timur Village, Pohuwato Regency, Gorontalo, Indonesia. The determination of Fe and Zn was carried out through Atomic Absorption Spectrophotometer and the microbes total was done by using the Total Plate Count test. Maximum Tolerable Intake value was calculated according to the provisions of JEFCA. The results of the study showed that the Fe and Zn average of blood cockles ranged from 227.85±5.04 ppm – 247.98±6.77ppm and 2.77±0.07ppm-2.82±0.09ppm. Microbes total ranged from 1.7 x 103 colonies/g – 2.4 x 103 colonies/g. The MTI value assumed for person weighing 70 kg based on Fe and Zn content of blood cockle is 0.226kg/day - 0.467kg/day and 24.822kg/day - 24.911kg/day. Blood cockles are a source of Fe, Zn and are safe for consumption according to MTI. Consumption of blood cockles helps reduce the problem of deficiency of Fe and Zn. The content of Fe is higher than the content of Zn in blood cockles. Blood cockles from Pohuwato regency are safe for consumption according to MTI. The microbes total in blood cockles ranged from 1.7x103 colonies/g -2, 4x 103 colonies/g. This total is below the Badan Pengawas Obat dan Makanan/ Indonesian National Agency of Drug and Food Control (BPOM) standard, which is 5 x 105 CFU/g so that the blood cockles are safe for consumption.
Online learning is one of the efforts made by the government in the education sector to prevent the spread of Covid-19 in Indonesia. The purpose of this study is to determine the implementation of the application of online learning to science lessons in biology material during the Covid-19 pandemic. This research method is descriptive. The results showed that the implementation of online learning of Biology Science material class VIII MTs in Gorontalo City in the teacher aspect included strong criteria as seen from 5 indicators, namely online learning tools, online learning processes, student participation in online learning, online practicum implementation and the assessment process. The implementation of online learning on the material of Biology Science class VIII MTs in Gorontalo City on student aspects includes strong criteria as can be seen from 4 indicators, namely the online learning process, student participation in online learning, implementation of online practicum and increasing creativity. Thus, it can be concluded that the implementation of online learning of biology science material class VIII MTs in Gorontalo City is a strong criterion.
This research is a development research that aims to describe the validity of an authentic performance-based assessment tool on ruminant livestock waste handling materials so that it can be used in the learning process to support the skills of students. The type of research carried out is a type of development research using the development and validation method, which was modified by Sugiyono (2020). This method explains how researchers can measure valid learning tools. Learning tools that are suitable for use have gone through the assessment stage by expert validators, learning tools that have been validated are Lesson plan, student worksheet and Authentic Assessment Instruments by expert validators and user validators. The results showed that the quality of the product produced based on the assessment of the aspects of the validity of the Lesson plan met the very valid criteria with an average value of the validator of 98.33%, the student worksheet met the very valid criteria with the average value of the validator of 95.45% and the Authentic Instrument Assessment meet the very valid criteria with an average value of 96.25% from the validator. This value is based on the validation assessment category, is in the score range of 81% -100%, is in the very valid criteria. Based on the results of the study, it can be concluded that the performance-based authentic assessment tool for the handling of ruminant livestock waste meets very valid criteria to support the skills of students and can be used in the learning process.
Chitosan of ark clams shell is regarded as untapped waste; it has potential as a heavy metal chelating agent and anti-bacterial. The objective of this research is to examine the effect of chitosan of the ark clams shell as a chelating agent to decrease of Pb and Hg level in the blood cockles meatball. This research is also aimed at exploring the capability of chitosan of the shell in decreasing the bacteria within blood cockle meatball. This research conducted complete randomized design with the provision of five-level of chitosan concentration, i.e., 0%, 0.5%, 1%, 1.5%, 2.0%. Atomic-Absorbent Spectrophotometric (AAS) method used to examine the level of Pb and Hg within the meatball, while the total of bacteria was determined by using Total Plate Count (TPC) method. The data were analyzed by using Analysis of Variance (ANOVA) and Least Significant Difference (LSD) test. The results reveal that the administration of chitosan of ark clam on blood cockle meatballs reduced Pb levels from 0.195 ppm to 0.168 ppm, while Hg levels reduced from levels of 0.018 to 0.008 ppm, and the number of bacteria from 2.4 × 102 to 1.4 × 102 colony/g. In conclusion, the chitosan of the ark clams shell can ensure the safety of the meatball product.
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