1,720,961 research outputs found
Studi Kandungan Logam Berat Timbal (Pb), Kadmium (Cd), Merkuri (Hg) pada Ikan Tongkol (Euthynnus sp.) di Pasar Ikan Rejomulyo Kota Semarang
Full text linkLogam berat dalam lingkungan perairan akibat pembuangan limbah industri di sepanjang wilayah pantura dapat menjadi sumber racun bagi kehidupan perairan. Berdasarkan data penelkitian dari Badan Penelitian dan Pengembangan Provinsi Jawa Tengah (2006) diketahui adanya kandungan logam berat di perairan Laut Jawa, memunghkinkan adanya kontaminasi pada ikan laut hasil Laut Jawa yang didistribusikan ke masyarakat. Hal ini menyimpang dari peraturan pemerintah yang mengatur dan melindungi keamanan pangan yaitu PP Nomor 28 tahun 2004 tentang Keamanan, Mutu dan Gizi Pangan. Penelitian ini bertujuan untuk mengetahui dan mengukur kadar logam berat Pb, Cd, dan Hg pada ikan tongkol yang dijual di Pasar Ikan Rejomulyo Kota Semarang. Penelitian ini bersifat deskriptif dengan pendekatan cross sectional study. Populasi dalam penelitian ini adalah seluruh ikan tongkol yang dijual oleh distributor I di Pasar Ikan Rejomulyo Kota Semarang. Sampel penelitian ini diambil secara purposive sampling yaitu 10 ekor ikan tongkol yang berasal dari daerah Kendal, Rembang, Tuban, Batang, dan Jepara. Hasil penelitian ini berdasarkan Peraturan BPOM tahun 2009 dan SNI 7387 tahun 2009 tentang Batas Maksimum Cemaran Logam Berat pada Makanan, dari 10 sampel terdapat 4 sampel (40%) melebihi batas maksimum cemaran Pb pada ikan (<0,3mg/kg) dengan kadar antara 0,420-0,610 mg/kg dan 6 sampel (60%) melebihi batas maksimum cemaran Cd pada ikan (<0,1 mg/kg) dengan kadar antara 0,100-0,300 mg/kg. Sedangkan kadar Hg pada ikan tongkol antara 0,008-0,310 mg/kg seluruhnya masih di bawah batas maksimum cemaran yang diperbolehkan (<0,5 mg/kg).
Kata Kunci: Logam berat, timbal, kadmium, merkuri, ikan tongko
Bahaya Kontaminasi Logam Berat Merkuri (Hg) dalam Ikan Laut dan Upaya Pencegahan Kontaminasi pada Manusia
Full text linkProduk pangan mentah terutama dari hasil laut memiliki tingkat pencemaran logam berat yang mengkhawatirkan akibat semakin banyaknya bahan pencemar yang masuk dalam lingkungan perairan Indonesia yang berasal dari pembuangan limbah industri di sepanjang wilayah pantai dapat menjadi sumber racun bagi kehidupan perairan. Adanya kandungan logam berat di perairan Laut Jawa, memungkinkan adanya kotaminasi pada ikan laut hasil Laut Jawa yang didistribusikan ke masyarakat. Hal ini tidak sesuai dengan peraturan pemerintah yang mengatur dan melindungi keamanan pangan yaitu PP Nomor 28 tahun 2004 tentang Keamanan, Mutu, dan Gizi Pangan. Penelitian ini bertujuan untuk mengetahui dan mengukur kadar logam berat merkuri (Hg) pada hasil laut di Pantai Utara Jawa dan menjelaskan upaya pencegahan kontaminasi pada manusia. Penelitian ini bersifat deskriptif dengan pendekatan cross sectional study. Akumulasi logam berat di dalam tubuh manusia dalam jangka waktu yang lama dapat mengganggu sistem peredaran darah, urat syaraf dan kerja ginjal. Kadar rata - rata logam berat merkuri (Hg) pada ikan tongkol (Euthynnus sp.) di Pantai Utara Jawa sebesar 0,141 mg/kg. Langkah pengendalian yang dapat diterapkan untuk mencegah bahaya logam berat Hg yaitu dengan pengendalian pencemaran limbah dari industri yang berlokasi disekitar wilayah perairan Laut Utara Jawa. Upaya pencegahan akumulasi kontaminasi logam berat Hg pada manusia yaitu mengatur konsumsi ikan laut setiap harinya dengan perhitungan ADI (Acceptable Daily Intake) diperoleh hasil 0,168 μg/kg BB per minggu. Akan tetapi bila konsumsi ikan seseorang melebihi rata-rata konsumsi perhari, dan weekly intake-nya melebihi PTWI (provisional tolerable weekly intake) yang telah ditetapkan WHO, maka dapat berefek negatif pada kesehatan
Gambaran Kualitas Lingkungan Sungai Cimandiri Akibat Cemaran Merkuri di Wilayah Penambangan Emas Skala Kecil (PESK) Kabupaten Sukabumi
Full text linkIn Indonesia, ASGM has increased. This results in an increased risk of mercury pollution in the environment (Minamata Initial Assessment Report, 2019). The amalgamation process for ASGM in Sukabumi, it used mercury as basic material for amalgamation process. It can increase to negative impacts on the environment and humans. This study aims to describe the impact of mercury contamination on the environmental quality of the Cimandiri River around ASGM in Sukabumi District. This research was conducted using a laboratory test method with reference to PP No. 22 at 2021 and SNI 7387 at 2009. The results of the tests found that the highest mercury exposure occurred in aquatic biota (catfish, snakehead and eel) which exceeded the quality standard, although the media water and sediment does not exceed the quality standard. This indicates that the quality of the Cimandiri River is unsafe for biota due to mercury contamination in local biota around ASGM. Therefore, there is a need for further studies on the safety of local food products from the Cimandiri River
Hubungan pengetahuan dan konsumsi vitamin c dengan kadar timbal dalam urin remaja di kecamatan Curug
Full text linkLead is a toxic and pervasive metal. Chronic exposure to low levels is responsible for significant health effects, particularly in early adolescent. Prevention remains the best option for reducing lead exposure. The objective of the present study was to determine the association between knowledge and consumption of vitamin c with lead exposure in early adolescents’ urine. This research is a quantitative study with cross sectional study design. Research subjects were 52 adolescents aged 12-16 years from Kadu Village, Curug. We examined associations of levels of knowledge and consumption of vitamin c with urine lead levels (Pb-U). We used a brief questionnaire on prevention for lead poisoning, included to measure knowledge (from Chicago Lead Knowledge Test Questionnaire) and daily intake of vitamin C (from Food Frequency Questionnaire) completed by respondents. Pb-U was measured using ICP-OES. The average urine lead levels of the early adolescents was 28,88 μg/L (median: 27,70 μg/L; CI 95% 24,85-32,90) (n=52), and Std. 14,46 μg/L. There was a significant difference between knowledge and the levels of Pb in the urine of early adolescent (p = 0,045). There was no significant difference between the consumption of vitamin c and the levels of Pb in the urine of early adolescent (p = 0,379). The hypothesis proved that the levels of knowledge affects lead levels in the urine of early adolescents. Therefore, it is suggested that government should educate the public about lead and its preventive actions and collaborate with policy makers to be more efficient
Work Department and Workplace Stress: A Cross-Sectional Study on Health Office Employees
Full text linkIntroduction: Work-related stress has become a critical issue in the health sector, with significant impact on productivity and quality of service. Preliminary studies found that 50% of employees at the Health Office of City X experienced work stress. This study aimed to investigate the association between gender, age, department, and stress among health workers in the Health Office of X city.Methods: A cross-sectional study was conducted among 115 Health Office employees in City X in February- July 2025, which has already fullfill the minimal sample size for two proportion hypothesis with alpha of 0.05 and 95% power. The subjects were from five departments in the Health Office. Data were collected through interviews using valid and reliable structured questionnaires of the Workplace Stress Scale. Analyses were performed using chi-square tests and logistic regression.Results: Overall, 53% of respondents experienced work-related stress. Older subjects (≥30 years) experienced more stress than younger workers, with an OR of 2.4 (95% CI: 1.04-5.56; p=0.038). Workers in the Division of Disease Prevention and Control also experienced more stress, with an OR of 3.56 (95% CI:1.13 – 11.11; p=0.030), while those in the other departments did not. No significant relationship was found between gender and work stress (p =0.552).Conclusion: Work stress mitigation for employees can be implemented through interventions such as cross-generational mentoring programs and workload evaluation. Additionally, it is necessary to conduct regular assessments of work stress, stress management training, and monitor the workload of all employees in the Health Department
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Paparan timbal dalam urin remaja pada kejadian gangguan sistem saraf dan keseimbangan di kecamatan Curug
Full text linkIn the production process, there are several industries that use Pb in their production process, one of which is in the battery smelting process. The explanation that the source of Pb pollution in Kec. Curug comes from battery recycling industry activities. One of the groups in society that is at risk of being affected is early adolescence which at that age is a period of rapid growth and development, both physically, psychologically and intellectually. Pb accumulation in body tissues, especially in the nerves will cause disturbances in the nervous system both structurally and functionally. It is known that it affects different parts of the brain, one of which is the cerebellum which has the function of coordinating adjustments quickly and automatically by maintaining body balance. The population of this study were 92 early adolescents in two high schools in Permata, Kec. Waterfall with a sample of 52 people. Examination of balance disorders is done with the Romberg test. This study used a cross-sectional study design with this type of observational research. In conclution, (92.3%) early teens urine contain Lead (Pb) are still below the specified Treshold Value (<50 µg/L). The emergence of complaints of the central nervous system and the balance disorder in early teens can be caused by other factors
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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