IOP Conference Series: Materials Science and Engineering
This study aims to analyze the bioaccumulation of chromium (Chromium) contained in the gill of Or... more This study aims to analyze the bioaccumulation of chromium (Chromium) contained in the gill of Oreochromis niloticus L. due to exposure to wastewater from a leather tanning industry in West Sumatra. Tilapia was exposed to the wastewater for 30 days, and Chromium concentration was measured in the gill of tilapia with Atomic Absorption Spectrophotometer (AAS). The variation of wastewater used was 1.85% and 3.69% of the LC-50 96 hour. The results showed that the BCF value was <100 for both variations. It can be concluded that Oreochromis niloticus L. has low bioaccumulation of chromium contained in tannery wastewater.
Pengabdian masyarakat dengan tema sanitasi lingkungan perumahan telah dilaksanakan di daerah Peru... more Pengabdian masyarakat dengan tema sanitasi lingkungan perumahan telah dilaksanakan di daerah Perumahan Belimbing Kecamatan Kuranji. Latar belakang diadakannya pengabdian masyarakat di daerah ini karena didapati daerah tersebut sering dilanda banjir, kondisi perumahan yang rapat sehingga jarak tangki septik dengna sumur warga sangat dekat dan hal tersebut memungkinkan pencemaran sumber air bersih, selain itu masih kurangnya kesadaran masyarakat dalam menjada kebersihan lingkungan. Pengabdian masyarakat dilaksanakan di Mesjid Muhajirin dan dihadiri oleh ibu-ibu dan para remaja mesjid setempat sebagai penerus yang bertugas menjaga kesehatan lingkungan Kelurahan Kuranji. Pengabdian diawali dengan pemberian materi tentang kesehatan lingkungan perumahan dilanjutkan dengan pelatihan pembiakan bakteri pendegradasi lumpur tangki septik dan diakhiri dengan pelatihan penggunaaan biopori. Acara berlangsung dengan semangat peserta dan diharapkan ilmu yang didapat dari pengabdian dapat diterapkan...
The purpose of this study is to determine the LC50 value of wastewater from printing industry in ... more The purpose of this study is to determine the LC50 value of wastewater from printing industry in Padang and to analyze the effect of Pb, Co, and Cr contained in the wastewater towards LC50 value. The results of the analysis of the characteristics of the printing industry wastewater, Pb concentration of 0.3 mg/l, Cr 0.8 mg/l and Co 0.9 mg/l. These concentrations exceed the quality standards in Indonesia according to PermenLH No. 05 of 2014 on Wastewater Quality Standard. Acute toxicity test was conducted in 96 hours observation using common carp (Cyprinus carpio.L) as animal testing with two replications. The value of LC50 was calculated using Probit Method by processing the data of testing animal mortality. The average value of LC50 was 128.05%. It can be proven from this study that Pb, Co and Cr affected the LC50 value indicated that a higher LC50 is related to a Pb, Co and Cr higher concentrations in wastewater and vice versa. Keywords: LC50, metals of printing industies, common c...
Air tanah sebagai salah satu sumber air baku biasanya memiliki kandungan logam besi (Fe) yang rel... more Air tanah sebagai salah satu sumber air baku biasanya memiliki kandungan logam besi (Fe) yang relatif tinggi sehingga perlu diolah.. Salah satu alternatif pengolahan yang dapat dilakukan adalah adsorpsi. Salah satu material yang dapat digunakan sebagai adsorben adalah batu apung. Batu apung banyak terdapat di alam dan belum banyak dimanfaatkan, salah satunya di Sungai Pasak, Pariaman Timur. Sehubungan dengan itu perlu dilakukannya penelitian penyisihan Fe air tanah menggunakan batu apung sebagai adsorben. Tujuan penelitian ini adalah menganalisis kemampuan batu apung sebagai adsorben penyisihan Fe air tanah. Penelitian dilakukan secara batch dengan variasi dosis adsorben, waktu kontak, diameter adsorben, pH adsorbat dan konsentrasi adsorbat pada larutan artifisial dan sampel air tanah. Konsentrasi Fe diukur dengan Spektrofotometer Serapan Atom (SSA). Hasil penelitian menunjukkan, kondisi optimum penyisihan Fe pada larutan artifisial terjadi pada : dosis adsorben 0,03 g/l, waktu kont...
This study aimed to analyze the LC50 value of metallic lead (Pb), chromium (Cr), and cobalt (Co) ... more This study aimed to analyze the LC50 value of metallic lead (Pb), chromium (Cr), and cobalt (Co) contained in the printing industry wastewater to Daphnia magna and analyze the relationship of these metals to the LC50 value. The measurement results konsnetrasi Pb and Cr do not exceed the quality standards established, but the metals Co exceeds quality standards. Toxicity of Pb, Cr, and Co were tested in static test using artificial solution of Pb, Cr, and Co in accordance with the concentration measured in the wastewater. Tests carried out consisted of two stages: a preliminary test and test base. Daphnia magna mortality data were analyzed using Probit method with the EPA program Probit Analysis Program Version 1.5. 24-hour LC50 value of Pb, Cr, and Co to Daphnia magna is 1.052% and the LC50 values of Pb, Cr, and Co are respectively 0.003 mg / l, 0.008 mg / l and 0.009 mg / l. All three metals have included the category of very toxic to Dahnia magna.
This research aims to analyze the effect of seawater intrusion with measurement of TDS dug well w... more This research aims to analyze the effect of seawater intrusion with measurement of TDS dug well water in Padang Utara Subdistrict. The measurements of TDS carried out in three villages in Padang Utara Subdistrict, namely the Village are Air Tawar Barat, Ulak Karang Selatan, and Ulak Karang Utara with twice sampling frequency: on November 2015 and February 2016. TDS concentration in November 2015 is in the range of 20 to 9000.8 mg / L, while the measurement of TDS concentration in February 2016 is in the range of 160.8 to 735.2 mg / L. Measurement of TDS in November 2015 showed that there were three wells that indicated to seawater intrusion, i.e. the ULS 8 (1101.6 mg / L), ULS 9 (9000.8 mg / L), and ULU 6 (1926.4 mg / L). Correlation between TDS concentration with coastline distance have a value r amounted to 0,118-.095. The results showed that there are some wells that indicated to seawater intrusion along the coast in Padang Utara Subdistrict.Keywords : distance, dug wells Padang ...
This study aimed to analyze the effect of transportation on lead (Pb) concentration in fried stre... more This study aimed to analyze the effect of transportation on lead (Pb) concentration in fried street foods of Padang school area and to analyze hygiene and sanitation handling against processed fried street foods ingredients. Samplings for the analysis of Pb concentration in fried street foods of school was conducted at the school area that located on the primary arterial road and the local secondary road in Simpang Haru District. Fried street food sampling and vehicle volume counting were conducted for 7 consecutive school days. In addition, the distribution of questionnaires to students and also to all traders of street food. The average Pb content of fried street food on primary arterial roads in the range of 0.249 ? 0.288 ppm and on local secondary roads ranging from 0.155 ? 0.218 ppm. The content of Pb in the primary arterial road passes the quality standard set by National Agency of Drug and Food Control Indonesia (0.25 ppm) and SNI (0.2 ppm). While the Pb content of the schools in the local secondary road only passed the SNI quality standard. The levels of Pb in food and volume of vehicles passing through the primary arterial road has a correlation value of 0.714, while on local secondary roads was 0.143. Pb in foods was not only caused by motor vehicle pollutants but also treatment when handling. This can be seen from the number of street vendors who do a positive treatment on hygiene and food sanitation to fried street food only about 30 ? 70 %.
Keluhan nyeri muskuloskeletal sering terjadi di tiga pabrik karet remah terbesar yang berlokasi d... more Keluhan nyeri muskuloskeletal sering terjadi di tiga pabrik karet remah terbesar yang berlokasi di Padang, Indonesia. Penelitian ini bertujuan untuk menganalisis postur kerja menggunakan metode Rapid Entire Body Assessment (REBA) untuk pekerja di area produksi. Pengambilan data postur karyawan menggunakan bantuan kamera video serta lembar observasi. Responden dalam penelitian ini terdiri dari 135 pekerja area produksi basah dan 213 pekerja area produksi kering. Penilaian REBA menunjukkan bahwa 72,34% dari pekerjaan yang diperiksa termasuk dalam kategori risiko menengah. Skor REBA tertinggi di area produksi basah adalah dalam proses pengeringan alami. Sebaliknya, di area produksi kering, skor REBA tertinggi adalah dalam proses mengangkat kontainer dari truk. Berdasarkan Standar Indonesia No.7269 / 2009 tentang perhitungan beban kerja, ini menunjukkan bahwa pekerjaan di pabrik-pabrik tersebut berada dalam kategori beban kerja sedang dengan pengeluaran energi 200-350 kkal/ jam (46,81%)...
Environmental Health Engineering and Management, Oct 6, 2019
Background: Lake Diatas is one of the important lake which is influenced by agricultural activiti... more Background: Lake Diatas is one of the important lake which is influenced by agricultural activities around the lake, and chlorpyrifos is widely used as a pesticide in this area. This study aimed to analyze the damage of the gill tissue of Oreochromis niloticus L. and Cyprinus carpio L. as two freshwater fish, which are mostly caught to be consumed by the residents in Lake Diatas, Indonesia, that were exposed to chlorpyrifos. Methods: Acclimatization was performed for 14 days and continued with toxicity test for 30 days. Chlorpyrifos exposure was tested at various concentrations. Fish gill tissue was observed microscopically in 10, 20, and 30 days of exposure, and damages were scored based on the level of gill tissue damage. Results: It was revealed that O. niloticus L. experienced edema, proximal basal hyperplasia, fusion, hyperplasia in all secondary lamellae, and necrosis at the higher exposure concentration. While C. carpio L. experienced fusion, hyperplasia, clubbing, necrosis, and obvious degradation of gill tissue of fish after 30 days of exposure to chlorpyrifos. There was a significant difference in the damage of fish gill tissue between each variation treatment (P < 0.05). Conclusion: According to the results, the higher the concentration of chlorpyrifos and the longer the exposure time, the higher the level of damage in gill tissue.
The purpose of this study is to determine the LC 50 value of wastewater from printing industry in... more The purpose of this study is to determine the LC 50 value of wastewater from printing industry in Padang and to analyze the effect of Pb, Co, and Cr contained in the wastewater towards LC 50 value. The results of the analysis of the characteristics of the printing industry wastewater, Pb concentration of 0.3 mg/l, Cr 0.8 mg/l and Co 0.9 mg/l. These concentrations exceed the quality standards in Indonesia according to PermenLH No. 05 of 2014 on Wastewater Quality Standard. Acute toxicity test was conducted in 96 hours observation using common carp (Cyprinus carpio.L) as animal testing with two replications. The value of LC 50 was calculated using Probit Method by processing the data of testing animal mortality. The average value of LC 50 was 128.05%. It can be proven from this study that Pb, Co and Cr affected the LC 50 value indicated that a higher LC 50 is related to a Pb, Co and Cr higher concentrations in wastewater and vice versa.
This study aimed to analyze the LC50 value of metallic lead (Pb), chromium (Cr), and cobalt (Co) ... more This study aimed to analyze the LC50 value of metallic lead (Pb), chromium (Cr), and cobalt (Co) contained in the printing industry wastewater to Daphnia magna and analyze the relationship of these metals to the LC50 value. The measurement results konsnetrasi Pb and Cr do not exceed the quality standards established, but the metals Co exceeds quality standards. Toxicity of Pb, Cr, and Co were tested in static test using artificial solution of Pb, Cr, and Co in accordance with the concentration measured in the wastewater. Tests carried out consisted of two stages: a preliminary test and test base. Daphnia magna mortality data were analyzed using Probit method with the EPA program Probit Analysis Program Version 1.5. 24-hour LC50 value of Pb, Cr, and Co to Daphnia magna is 1.052% and the LC50 values of Pb, Cr, and Co are respectively 0.003 mg / l, 0.008 mg / l and 0.009 mg / l. All three metals have included the category of very toxic to Dahnia magna.Keywords: Pb, Cr, Co, Daphnia magn...
Food business is a very promising, but the products must be safe and worth buying. Good manufactu... more Food business is a very promising, but the products must be safe and worth buying. Good manufacturing practices (GMP) are production practices which considering various aspects, such as preventing food contamination during the production process, and production control as well. Small and Medium Enterprises (SME) fostered by Andalas University, which is engaged in the field of food manufacturing, wants to find its products better known and with a wide sales distribution. This can be realized if the business owner has the trust of many consumers. One effort that can be done is to implement the GMP For this reason, SMEs need to receive GMP Training.The method of this event is in the form of training to socialize the concept of GMP for food SMEs fostered by Andalas University, as well as self-assessment of the application of GMP that has been carried out by each SME. The training was held in the presence of 50 SMEs assisted by Andalas University, on Thursday / December 5, 2019 at Amaris...
stage of adult > 0.50 m; the appropriate water velocity for juvenile stage < 0.76 m/s, subadult s... more stage of adult > 0.50 m; the appropriate water velocity for juvenile stage < 0.76 m/s, subadult stage 0.26-1.00 m/s and adult stage > 0.50 m/s; the appropriate types of base subtract for juvenile stage are sand, pebble and small cobble, for subadult and adult stage are small cobble and big stone in flow, while the appropriate cover types for juvenile, subadult and adult stage are relatively resemble which are no cover, the tree shadow and big stone in flow.
IOP Conference Series: Materials Science and Engineering
This study aims to analyze the bioaccumulation of chromium (Chromium) contained in the gill of Or... more This study aims to analyze the bioaccumulation of chromium (Chromium) contained in the gill of Oreochromis niloticus L. due to exposure to wastewater from a leather tanning industry in West Sumatra. Tilapia was exposed to the wastewater for 30 days, and Chromium concentration was measured in the gill of tilapia with Atomic Absorption Spectrophotometer (AAS). The variation of wastewater used was 1.85% and 3.69% of the LC-50 96 hour. The results showed that the BCF value was <100 for both variations. It can be concluded that Oreochromis niloticus L. has low bioaccumulation of chromium contained in tannery wastewater.
Pengabdian masyarakat dengan tema sanitasi lingkungan perumahan telah dilaksanakan di daerah Peru... more Pengabdian masyarakat dengan tema sanitasi lingkungan perumahan telah dilaksanakan di daerah Perumahan Belimbing Kecamatan Kuranji. Latar belakang diadakannya pengabdian masyarakat di daerah ini karena didapati daerah tersebut sering dilanda banjir, kondisi perumahan yang rapat sehingga jarak tangki septik dengna sumur warga sangat dekat dan hal tersebut memungkinkan pencemaran sumber air bersih, selain itu masih kurangnya kesadaran masyarakat dalam menjada kebersihan lingkungan. Pengabdian masyarakat dilaksanakan di Mesjid Muhajirin dan dihadiri oleh ibu-ibu dan para remaja mesjid setempat sebagai penerus yang bertugas menjaga kesehatan lingkungan Kelurahan Kuranji. Pengabdian diawali dengan pemberian materi tentang kesehatan lingkungan perumahan dilanjutkan dengan pelatihan pembiakan bakteri pendegradasi lumpur tangki septik dan diakhiri dengan pelatihan penggunaaan biopori. Acara berlangsung dengan semangat peserta dan diharapkan ilmu yang didapat dari pengabdian dapat diterapkan...
The purpose of this study is to determine the LC50 value of wastewater from printing industry in ... more The purpose of this study is to determine the LC50 value of wastewater from printing industry in Padang and to analyze the effect of Pb, Co, and Cr contained in the wastewater towards LC50 value. The results of the analysis of the characteristics of the printing industry wastewater, Pb concentration of 0.3 mg/l, Cr 0.8 mg/l and Co 0.9 mg/l. These concentrations exceed the quality standards in Indonesia according to PermenLH No. 05 of 2014 on Wastewater Quality Standard. Acute toxicity test was conducted in 96 hours observation using common carp (Cyprinus carpio.L) as animal testing with two replications. The value of LC50 was calculated using Probit Method by processing the data of testing animal mortality. The average value of LC50 was 128.05%. It can be proven from this study that Pb, Co and Cr affected the LC50 value indicated that a higher LC50 is related to a Pb, Co and Cr higher concentrations in wastewater and vice versa. Keywords: LC50, metals of printing industies, common c...
Air tanah sebagai salah satu sumber air baku biasanya memiliki kandungan logam besi (Fe) yang rel... more Air tanah sebagai salah satu sumber air baku biasanya memiliki kandungan logam besi (Fe) yang relatif tinggi sehingga perlu diolah.. Salah satu alternatif pengolahan yang dapat dilakukan adalah adsorpsi. Salah satu material yang dapat digunakan sebagai adsorben adalah batu apung. Batu apung banyak terdapat di alam dan belum banyak dimanfaatkan, salah satunya di Sungai Pasak, Pariaman Timur. Sehubungan dengan itu perlu dilakukannya penelitian penyisihan Fe air tanah menggunakan batu apung sebagai adsorben. Tujuan penelitian ini adalah menganalisis kemampuan batu apung sebagai adsorben penyisihan Fe air tanah. Penelitian dilakukan secara batch dengan variasi dosis adsorben, waktu kontak, diameter adsorben, pH adsorbat dan konsentrasi adsorbat pada larutan artifisial dan sampel air tanah. Konsentrasi Fe diukur dengan Spektrofotometer Serapan Atom (SSA). Hasil penelitian menunjukkan, kondisi optimum penyisihan Fe pada larutan artifisial terjadi pada : dosis adsorben 0,03 g/l, waktu kont...
This study aimed to analyze the LC50 value of metallic lead (Pb), chromium (Cr), and cobalt (Co) ... more This study aimed to analyze the LC50 value of metallic lead (Pb), chromium (Cr), and cobalt (Co) contained in the printing industry wastewater to Daphnia magna and analyze the relationship of these metals to the LC50 value. The measurement results konsnetrasi Pb and Cr do not exceed the quality standards established, but the metals Co exceeds quality standards. Toxicity of Pb, Cr, and Co were tested in static test using artificial solution of Pb, Cr, and Co in accordance with the concentration measured in the wastewater. Tests carried out consisted of two stages: a preliminary test and test base. Daphnia magna mortality data were analyzed using Probit method with the EPA program Probit Analysis Program Version 1.5. 24-hour LC50 value of Pb, Cr, and Co to Daphnia magna is 1.052% and the LC50 values of Pb, Cr, and Co are respectively 0.003 mg / l, 0.008 mg / l and 0.009 mg / l. All three metals have included the category of very toxic to Dahnia magna.
This research aims to analyze the effect of seawater intrusion with measurement of TDS dug well w... more This research aims to analyze the effect of seawater intrusion with measurement of TDS dug well water in Padang Utara Subdistrict. The measurements of TDS carried out in three villages in Padang Utara Subdistrict, namely the Village are Air Tawar Barat, Ulak Karang Selatan, and Ulak Karang Utara with twice sampling frequency: on November 2015 and February 2016. TDS concentration in November 2015 is in the range of 20 to 9000.8 mg / L, while the measurement of TDS concentration in February 2016 is in the range of 160.8 to 735.2 mg / L. Measurement of TDS in November 2015 showed that there were three wells that indicated to seawater intrusion, i.e. the ULS 8 (1101.6 mg / L), ULS 9 (9000.8 mg / L), and ULU 6 (1926.4 mg / L). Correlation between TDS concentration with coastline distance have a value r amounted to 0,118-.095. The results showed that there are some wells that indicated to seawater intrusion along the coast in Padang Utara Subdistrict.Keywords : distance, dug wells Padang ...
This study aimed to analyze the effect of transportation on lead (Pb) concentration in fried stre... more This study aimed to analyze the effect of transportation on lead (Pb) concentration in fried street foods of Padang school area and to analyze hygiene and sanitation handling against processed fried street foods ingredients. Samplings for the analysis of Pb concentration in fried street foods of school was conducted at the school area that located on the primary arterial road and the local secondary road in Simpang Haru District. Fried street food sampling and vehicle volume counting were conducted for 7 consecutive school days. In addition, the distribution of questionnaires to students and also to all traders of street food. The average Pb content of fried street food on primary arterial roads in the range of 0.249 ? 0.288 ppm and on local secondary roads ranging from 0.155 ? 0.218 ppm. The content of Pb in the primary arterial road passes the quality standard set by National Agency of Drug and Food Control Indonesia (0.25 ppm) and SNI (0.2 ppm). While the Pb content of the schools in the local secondary road only passed the SNI quality standard. The levels of Pb in food and volume of vehicles passing through the primary arterial road has a correlation value of 0.714, while on local secondary roads was 0.143. Pb in foods was not only caused by motor vehicle pollutants but also treatment when handling. This can be seen from the number of street vendors who do a positive treatment on hygiene and food sanitation to fried street food only about 30 ? 70 %.
Keluhan nyeri muskuloskeletal sering terjadi di tiga pabrik karet remah terbesar yang berlokasi d... more Keluhan nyeri muskuloskeletal sering terjadi di tiga pabrik karet remah terbesar yang berlokasi di Padang, Indonesia. Penelitian ini bertujuan untuk menganalisis postur kerja menggunakan metode Rapid Entire Body Assessment (REBA) untuk pekerja di area produksi. Pengambilan data postur karyawan menggunakan bantuan kamera video serta lembar observasi. Responden dalam penelitian ini terdiri dari 135 pekerja area produksi basah dan 213 pekerja area produksi kering. Penilaian REBA menunjukkan bahwa 72,34% dari pekerjaan yang diperiksa termasuk dalam kategori risiko menengah. Skor REBA tertinggi di area produksi basah adalah dalam proses pengeringan alami. Sebaliknya, di area produksi kering, skor REBA tertinggi adalah dalam proses mengangkat kontainer dari truk. Berdasarkan Standar Indonesia No.7269 / 2009 tentang perhitungan beban kerja, ini menunjukkan bahwa pekerjaan di pabrik-pabrik tersebut berada dalam kategori beban kerja sedang dengan pengeluaran energi 200-350 kkal/ jam (46,81%)...
Environmental Health Engineering and Management, Oct 6, 2019
Background: Lake Diatas is one of the important lake which is influenced by agricultural activiti... more Background: Lake Diatas is one of the important lake which is influenced by agricultural activities around the lake, and chlorpyrifos is widely used as a pesticide in this area. This study aimed to analyze the damage of the gill tissue of Oreochromis niloticus L. and Cyprinus carpio L. as two freshwater fish, which are mostly caught to be consumed by the residents in Lake Diatas, Indonesia, that were exposed to chlorpyrifos. Methods: Acclimatization was performed for 14 days and continued with toxicity test for 30 days. Chlorpyrifos exposure was tested at various concentrations. Fish gill tissue was observed microscopically in 10, 20, and 30 days of exposure, and damages were scored based on the level of gill tissue damage. Results: It was revealed that O. niloticus L. experienced edema, proximal basal hyperplasia, fusion, hyperplasia in all secondary lamellae, and necrosis at the higher exposure concentration. While C. carpio L. experienced fusion, hyperplasia, clubbing, necrosis, and obvious degradation of gill tissue of fish after 30 days of exposure to chlorpyrifos. There was a significant difference in the damage of fish gill tissue between each variation treatment (P < 0.05). Conclusion: According to the results, the higher the concentration of chlorpyrifos and the longer the exposure time, the higher the level of damage in gill tissue.
The purpose of this study is to determine the LC 50 value of wastewater from printing industry in... more The purpose of this study is to determine the LC 50 value of wastewater from printing industry in Padang and to analyze the effect of Pb, Co, and Cr contained in the wastewater towards LC 50 value. The results of the analysis of the characteristics of the printing industry wastewater, Pb concentration of 0.3 mg/l, Cr 0.8 mg/l and Co 0.9 mg/l. These concentrations exceed the quality standards in Indonesia according to PermenLH No. 05 of 2014 on Wastewater Quality Standard. Acute toxicity test was conducted in 96 hours observation using common carp (Cyprinus carpio.L) as animal testing with two replications. The value of LC 50 was calculated using Probit Method by processing the data of testing animal mortality. The average value of LC 50 was 128.05%. It can be proven from this study that Pb, Co and Cr affected the LC 50 value indicated that a higher LC 50 is related to a Pb, Co and Cr higher concentrations in wastewater and vice versa.
This study aimed to analyze the LC50 value of metallic lead (Pb), chromium (Cr), and cobalt (Co) ... more This study aimed to analyze the LC50 value of metallic lead (Pb), chromium (Cr), and cobalt (Co) contained in the printing industry wastewater to Daphnia magna and analyze the relationship of these metals to the LC50 value. The measurement results konsnetrasi Pb and Cr do not exceed the quality standards established, but the metals Co exceeds quality standards. Toxicity of Pb, Cr, and Co were tested in static test using artificial solution of Pb, Cr, and Co in accordance with the concentration measured in the wastewater. Tests carried out consisted of two stages: a preliminary test and test base. Daphnia magna mortality data were analyzed using Probit method with the EPA program Probit Analysis Program Version 1.5. 24-hour LC50 value of Pb, Cr, and Co to Daphnia magna is 1.052% and the LC50 values of Pb, Cr, and Co are respectively 0.003 mg / l, 0.008 mg / l and 0.009 mg / l. All three metals have included the category of very toxic to Dahnia magna.Keywords: Pb, Cr, Co, Daphnia magn...
Food business is a very promising, but the products must be safe and worth buying. Good manufactu... more Food business is a very promising, but the products must be safe and worth buying. Good manufacturing practices (GMP) are production practices which considering various aspects, such as preventing food contamination during the production process, and production control as well. Small and Medium Enterprises (SME) fostered by Andalas University, which is engaged in the field of food manufacturing, wants to find its products better known and with a wide sales distribution. This can be realized if the business owner has the trust of many consumers. One effort that can be done is to implement the GMP For this reason, SMEs need to receive GMP Training.The method of this event is in the form of training to socialize the concept of GMP for food SMEs fostered by Andalas University, as well as self-assessment of the application of GMP that has been carried out by each SME. The training was held in the presence of 50 SMEs assisted by Andalas University, on Thursday / December 5, 2019 at Amaris...
stage of adult > 0.50 m; the appropriate water velocity for juvenile stage < 0.76 m/s, subadult s... more stage of adult > 0.50 m; the appropriate water velocity for juvenile stage < 0.76 m/s, subadult stage 0.26-1.00 m/s and adult stage > 0.50 m/s; the appropriate types of base subtract for juvenile stage are sand, pebble and small cobble, for subadult and adult stage are small cobble and big stone in flow, while the appropriate cover types for juvenile, subadult and adult stage are relatively resemble which are no cover, the tree shadow and big stone in flow.
Uploads
Papers by Tivany Edwin