Muhammad Musa - Academia.edu (original) (raw)

Papers by Muhammad Musa

Rekayasa

The diffusion process is a limiting factor that key plays for the oxygen transfer mechanism in th... more The diffusion process is a limiting factor that key plays for the oxygen transfer mechanism in the pond water column. The purpose of this study was to determine of oxygen diffusion rate during the blind feeding period of intensive shrimp culture of vaname (L. vannamei). This research was conducted for 30 days blind feeding period of intensive vaname shrimp culture, the research using concept of expose facto causal design. Furthermore, the oxygen diffusion rate is calculated mathematically and a regression test is carried out on the associated water quality parameters. During the blind feeding period, the oxygen diffusion rate fluctuates and dynamically, with a diffusion rate ranging from 0.015-0.028 mgO2/L/hour. This condition is followed by a stabilizing and optimum condition of pond water quality parameter values throughout in the aquaculture. Diurnal periodically, the oxygen diffusion mechanism has an influence on the level of oxygen solubility in ponds. This relationship is modeled by the equation Y = 0.006 + 0.002x. This means that for each diffusion transfer increase of 1 mgO2/L/hour, there will be an oxygen increase in the ponds of 0.002 mg/L. The conclusion of this study is that the oxygen diffusion rate during the blind feeding period of intensive vaname shrimp culture obtained an average at 0.020 mgO2/L/hour, ranging from 0.018-0.023 mgO2/L/hour for 30 days of culture. From the results of this study, it is hoped that research can be developed study regarding of mechanisms, dynamics, and the effect of oxygen diffusion on the intensive shrimp farming ecology.

Environment Protection Engineering

Mansoura Journal of Forensic Medicine and Clinical Toxicology

Polish Journal of Environmental Studies

The whiteleg shrimp Litopenaeus vannamei is one of the most cultured penaeid species in Indonesia... more The whiteleg shrimp Litopenaeus vannamei is one of the most cultured penaeid species in Indonesia. However, a good standard of environment such as water quality characteristics for aquaculture must be met to avoid commercial loss. The aims of the study were to analyze the water quality in the aquaculture pond and their relationship with plankton dynamics and specific growth rate (SGR) of L. vannamei. A descriptive method with the analysis on the primary and the secondary data was performed to determine the effect of water quality on the abundance of plankton and the SGR of the whiteleg shrimp in the intensive pond. The results showed that the plankton abundance indicates that the pond is eutrophic and the water quality affects the plankton abundance. The regression analysis demonstrated that the abundance of phytoplankton was influenced (from the highest to the lowest regression coefficient) by the salinity (94.7%), orthophosphate (94.1%), temperature (91.8 %), CO 2 (80.3%), turbidity (66.1%), total organic matter (TOM, 35.2%) and ammonia (16.4%). On the other hand, the zooplankton abundance was significantly affected by the temperature (44.7%), turbidity (41.9%), dissolved oxygen (DO, 26.2%), salinity (14.9%) and TOM (7.2%). The parameters of water quality that affect SGR L. vannamei were ammonia (87.3%), zooplankton abundance (81.2%), TOM (74.9%), DO (63.1%), pH (48.9%), temperature (41%), turbidity (25.8%), salinity (19.4%), orthophosphate (13.2%),

Journal of Enviromental Engineering and Sustainable Technology

Electrical energy is one of the vital needs of the coastal communities, especially in coastal are... more Electrical energy is one of the vital needs of the coastal communities, especially in coastal areas that are not affordable electricity network. To meet these needs energy diversification efforts are undertaken, such as the utilization of the energy potential of ocean currents. The aim of this study was to determine the seabed morphology and properties of hydro-oceanography as a reference the exact location in the utilization of the energy of ocean currents. Location of research in the territorial waters of East Java. Research methods such as measurement of currents, tidal observation, observation of meteorological parameters and conditions of the seabed morphology and the coastal area of research. The study was conducted to estimate the potential energy of ocean currents are spatially and temporally by utilizing a hydrodynamic model simulation results and the results of current data measurement in the field, and convert them into power unit. Which will ultimately produced maps of potential energy from ocean currents of East Java waters territory. In comparison, there are several advantages of ocean current energy utilization compared to other energy generation, such as the production of electricity generated by ocean currents each year tend to be stable and more environmentally friendly because without using fuel. Potential sites for power plants in East Java waters of the ocean currents are respectively Madura Strait Region, Southern Water of East Java, and Bali Strait water.

International Journal Of Community Service

Health istitha'ah is the health ability of the pilgrims physically and mentally with a measur... more Health istitha'ah is the health ability of the pilgrims physically and mentally with a measurable health assesment. It is essential for every citizen who will perform the hajj pilgrimage. The Indonesian Ministry of Health through the Non-Infectious Disease Integrated Service Post (Posbindu PTM) implements an early detection and prevention program for non-infectious diseases in sub-districts, schools or colleges, institutions or workplaces, and Hajj guidance groups (KBIH) especially for pilgrims. The department of public health and community medicine (IKM-IKK) of the Faculty of Medicine, Sriwijaya University perform an education on the detection of risk factors for non-infectious diseases and physical fitness assesment of prospective pilgrims in the context of community service activities at KBIH Bisri Palembang. Examinations were done on 40 prospective pilgrims using the Rockport test method. The results of the examination showed that the 24 pilgrims had moderate fitness level (...

Biodiversitas Journal of Biological Diversity

One way to monitor water quality is by using biological indicators, namely epiphytic microalgae (... more One way to monitor water quality is by using biological indicators, namely epiphytic microalgae (periphyton). This study aims to analyze the epiphytic periphyton community structure and analyze the river health status using a saprobic index. The research location was in the Brantas River, Blitar District, East Java, Indonesia. The method used was a survey with sampling at three sites based on the purposive sampling technique. Periphyton samples were taken using the quadrant transect (5x5 cm²) method and then identified using the Lackey Drop Micro transect Counting Method. The results show that the periphyton community structure is in balance, and there are six divisions of 59 different genera. The six divisions found are Bacillariophyta, Cyanophyta, Chlorophyta, Charophyta, Ochrophyta, and Rhodophyta. The most identified genus is from the Bacillariophyta Division with 28 genera, while the least identified genus is the Rhodophyta division with 1 genus. The abundance ranges from 242,800-1,229,174 cells. cm-2 , the relative abundance index of periphyton ranges from 3-60% (site 1), 9-57% (site 2), 1-62% (site 3), the diversity index ranges from 1.212-2.617 (moderate), the uniformity index ranges from 0.307-2.151 (high), the dominance index ranges from 0.105-0.549 (moderate), and the saprobic index ranges from-0.18 to 0.55. Moreover, supporting water quality parameters are still optimal, except for ammonia and total organic matter parameters that exceed the quality standard. Based on the saprobic value obtained, the water quality of the Brantas River in Tawangrejo Village can be classified into the category of α/β-mesosaprobic to βmesosaprobic saprobic levels with mild to moderate levels of pollution.

Plant Stress Physiology

The major wheat-producing countries have heterogeneous and fragile agro climatic surroundings but... more The major wheat-producing countries have heterogeneous and fragile agro climatic surroundings but frequently restraining wheat yield and quality losses are predominant under heat and drought prone agriculture exclusively when both stresses occur in blend, which looms the food security globally. However, many suggested examples are available in these countries for the mitigation of these two stresses by using different conventional and modern improvement and agronomic approaches. In addition to these approaches, morphological, physiological, anatomical, biochemical, phenological, and physiochemical vicissitudes, which trigged during these stresses, have also been elucidated. There complete deliberation in combination for wheat improvement is still a contest, but a win-win option is a holistic attitude in future.

Journal of Ecological Engineering

Mangroves are a crucial ecosystem in coastal areas and serve a significant ecological function. H... more Mangroves are a crucial ecosystem in coastal areas and serve a significant ecological function. However, this ecosystem is under the continuous pressure of anthropogenic activities which create toxic contaminants, such as heavy metals. The presence of marine ports and electric steam power plants next to Bee Jay Bakau Resort (BJBR) Mangrove Forest may worsen the heavy metal pollution, especially in the case of non-essential metals like lead (Pb). The vegetation in mangrove ecosystems can help store and trap this contaminant. Therefore, the objective of this study was to determine the potency of the Avicennia alba and Rhizopora mucronata mangrove species, which dominate the mangrove vegetation in BJBR Mangrove Forest, as Pb phytoremediation agents. The samples were taken from the sediment, roots, stems, and leaves of the mangrove trees. The results showed that the Pb found in the sediment of these species ranged from 10.323 to 11.071 ppm, while the Pb concentration in the mangrove parts was less than 1 ppm with the order roots > stems > leaves. Furthermore, the statistical analysis indicated that there were no statistically significant differences in the Pb values across sites and species. Moreover, the BCF, BAC, and TF in this study were less than 1, making the observed mangrove species unsuitable for phytoextraction or phytostabilization.

Journal of Ecological Engineering

This study aims to analyze the lipid, carbohydrate and protein content of Chlorella pyrenoidosa a... more This study aims to analyze the lipid, carbohydrate and protein content of Chlorella pyrenoidosa after being treated with the tofu wastewater. The method used in this study was an experimental method with 4 treatments and 3 replications. The treatment was performed by administering different concentrations of the tofu wastewater to the C. pyrenoidosa. The concentrations used were 10%, 15% and 20%. Determination of these concentrations was based on the preliminary test. The main parameters observed were the lipid, carbohydrate and protein content of C. pyrenoidosa and the supporting parameters were the growth rate, doubling time and characteristics of the tofu wastewater. The study was conducted for 8 days using the batch culture method. In the exponential phase, the microalgae were harvested and then their contents were analyzed. The data obtained were analyzed using MS Office Excel 2016. The highest content of lipid, carbohydrate and protein of C. pyrenoidosa was in the treatment of 20% tofu wastewater, reaching 1.56%; 28.92%; and 28.92%, respectively. Meanwhile, the highest growth rate and the smallest doubling time in the treatment of 20% tofu wastewater accounted for 0.8264 day-1 and 0.0349 hours-1. Moreover, the rates of BOD and TSS of the tofu wastewater at the end of the study decreased. It can be concluded that administering different concentrations of the tofu wastewater can affect the lipid, carbohydrate and protein content of C. pyrenoidosa. It was suggested that further research is needed to conduct semi-continuous cultivation of C. pyrenoidosa using a higher density so that the results obtained can be optimized.

Research Journal of Life Science

Jatigede Reservoir in Sumedang Regency is a land mass planning designed as a multi-function reser... more Jatigede Reservoir in Sumedang Regency is a land mass planning designed as a multi-function reservoir. The main water source for this reservoir is from Cimanuk River, which flows through Garut Regency, and has many industrial activities around the river flow. This research was conducted to assess the trophic status of water pollution in Jatigede Reservoir by utilizing plankton as a bioindicator agent. Samples were collected from 9 observation stations from November 2018 until January 2019. The results showed that 26 species of phytoplankton from 7 divisions including Dinophyta, Cyanophyta, Chlorophyta, Chrysophyta, Euglenophyta, Bacillariophyta, and Charophyta was found in Jatigede Reservoir at about 461 ind/m3. Zooplankton abundance of 6 species from 2 divisions of Rotifera and Copepoda at 2 ind/m3. The average phytoplankton diversity index was 0.93 and zooplankton diversity index was 0.23. The average phytoplankton evenness index was 0.44 and zooplankton evenness index was 0.24. T...

Biodiversitas Journal of Biological Diversity

Nile tilapia (Oreochromis niloticus) has been commonly cultured all over the world, especially in... more Nile tilapia (Oreochromis niloticus) has been commonly cultured all over the world, especially in Indonesia, due to high market demand. The success of Nile tilapia culture production depends on the fish growth during cultivation as well as pond environment. Many studies have revealed that quality of water strongly affects fish growth in an aquaculture pond. This study aims to investigate the relationship among water quality like Physico-chemical (temperature, transparency, pH, dissolved oxygen, carbon dioxide, nitrate, and phosphate) and biological (phytoplankton abundance) factors and the specific growth rate of Nile tilapia in a freshwater cultivation pond in Batu City, Indonesia. The data was analyzed using the path model. Results indicated that the most significant factor for fish growth was the phytoplankton abundance. However, since nitrate and phosphate also played roles as determinants of phytoplankton abundance, they can be considered indirect water quality factors of Nile tilapia growth.

Biodiversitas Journal of Biological Diversity

Whiteleg shrimp (Litopenaeus vannamei) is a popular aquaculture species in Indonesia due to its h... more Whiteleg shrimp (Litopenaeus vannamei) is a popular aquaculture species in Indonesia due to its high market demand. It requires excellent water quality to ensure its growth rate and production. Therefore, intensive culture system is considered. However, the system threatens the sustainability of the adjacent environment and thus proper water treatment is necessary to increase the quality of water used in shrimp farming as well as the wastewater it produces. In this study, we explored the use of a silvofishery system that integrates mangroves into a pond as a potential solution to this issue. This study aimed to assess the effectiveness of the silvofishery system at treating water inputs and effluents of a whiteleg shrimp pond in Probolinggo District, East Java, Indonesia. Eight physicochemical water quality parameters and a phytoplankton community at four sampling sites during neap tide period were examined in this study. The effectiveness of the silvofishery system in increasing water quality was analyzed using analysis of variance (ANOVA), while t he diversity of phytoplankton for biomonitoring was measured with the Shannon-Wiener diversity index (H'). The results showed that the mangrove effectively increased the quality of the water supply and wastewater in the intensive whiteleg shrimp pond-especially in terms of nutrient removal-as well as the biodiversity of its phytoplankton community. Other parameters such as TOM and ammonia also decreased, though this was not statistically proven.

Asian Journal of Scientific Research

Omni-Akuatika

Milkfish is potential fish with high production and belong to ten of fish commodities culture in ... more Milkfish is potential fish with high production and belong to ten of fish commodities culture in Indonesia. Pond stability of milkfish especially in fingerling phase (young phase) influenced by several factors including water quality and organism availability (periphyton). This recent study aimed to assess the milkfish traditional pond stability in fingerling phase based on water quality and periphyton availability aspects. These aspects are quite important to milkfish production and their growth as well as their food habit. The research was conducted in traditional pond located in UPT Fisheries Brackish and Saline Water Probolinggo for three months. Water quality and periphyton analyses were in situ and ex situ. The result shows that all the water quality is belong to good condition (stable) except in ammonia, TOM, and orthophosphate. However, this fluctuated value is not significantly impacting to the living organisms (milkfish). The research concluded that the fingerling milkfish...

DIKEMAS (Jurnal Pengabdian Kepada Masyarakat)

Kabupaten Tuban merupakan salah satu wilayah percontohan industrialisasi tambak udang khususnya u... more Kabupaten Tuban merupakan salah satu wilayah percontohan industrialisasi tambak udang khususnya udang vanamei. Desa Temaji merupakan salah satu desa di Tuban yang memiliki potensi budidaya udang vanamei untuk dikembangkan. Pembudidaya udang vanamei bernaung pada Kelompok tani Riswada. Tujuan pelaksanaan pengabdian di Desa Temaji adalah berbagi pengetahuan, peningkatan pemahaman dan keterampilan mitra dalam peningkatan teknologi semi intensif di tambak budidaya udang vanamei, pemantauan kualitas air melalui pelatihan pengukuran kualitas air, dan proses budidaya udang vanamei melalui pemanfaatan teknologi tepat guna dengan introduksi alat automatic feeder (autofeeder) secara mandiri. Pengabdian masyarakat ini terlaksana berdasarkan permasalahan yang terjadi pada mitra terkait kegiatan budidaya udang vanami seperti proses budidaya yang dilakukan oleh mitra masih secara tradisional/ekstensif dan efesiensi pakan yang masih rendah karena pemberian pakan masih secara konvensional.Kata Kunc...

Journal of Business Management and Economic Research

This study examines the impacts of E-CRM features on customer satisfaction and perceived usefulne... more This study examines the impacts of E-CRM features on customer satisfaction and perceived usefulness as a mediator variable within e-commerce sector of Turkey. E-commerce businesses are operating in constantly changing environment and trends, thus E-CRM features may serve not only as a way for maintaining stable relationship with customers, but as tool for gaining competitive advantage that leads to customer satisfaction. Within the framework of this study quantitative research methods were applied. Primary data from 210 respondents has been collected through self-administered, Likert type online survey. Research model constructs were evaluated and analysed with a help of confirmatory factor analysis (CFA) and structural equational model (SEM). The findings of the study indicated that E-CRM features represented in current research (complaint handling, communication, information content, security and privacy) demonstrate both direct and indirect impact (through perceived usefulness variable) on customer satisfaction.

Masalah-Masalah Hukum

Perbedaan penalaran hakim memutus perkara korupsi pemberian kredit yang terjadi di Bank Riau-Kepr... more Perbedaan penalaran hakim memutus perkara korupsi pemberian kredit yang terjadi di Bank Riau-Kepri,menjadi persoalan yuridis ketika menentukan kesalahan perbuatan turut serta para terdakwa. Permasalahan yang diteliti adalah tentang konstruksi pemikiran hakim menentukan unsur tindak pidana dan kesalahan para terdakwa. Urgensi penelitian ini untuk memahami pilihan prakis hakim menggunakan ajaran penyertaan, ketika menerapkan Pasal 55 KUHP dalam mengadili perbuatan turut serta. Pendekatan penelitian yang digunakani yuridis empiris dengan spesifikasi penelitian hukum normatif. Temuan penelitian, bahwa perbuatan pemberi kredit dari Bank Riau-Kepri terbukti bersalah dan dipidana. Penerima kredit diputus lepas dari segala tuntutan hukum. Konstruksi penalaran hakim, perbuatan penerima kredit tidak dapat dipertanggungjawabkan secara pidana karena perbuatan yang terbukti masuk dalam lingkup hukum perdata.

Samakia : Jurnal Ilmu Perikanan

Lead is one of the heavy metals of pollutant sources that are highly toxic and can not be degrade... more Lead is one of the heavy metals of pollutant sources that are highly toxic and can not be degraded thus accumulating in sediments and aquatic organisms including Tubifex worms. The objectives of the study were to determine the concentration and to analyze the correlation of lead concentration (Pb) contained in water, sediments and Tubifex worms. The research method used is survey. Samples were taken at the waters of the landfill. The determination of lead concentration (Pb) was used by Atomic Absorption Spectrophotometer (AAS) method. The results of measurements of lead concentration (Pb) in water, sediments and Tubifex worms tabulated in tables and graphs, were analyzed descriptively. To prove that the increase of Pb concentration in Tubifex worms along with the increase of Pb content in water and sediment, a simple linear regression analysis was performed. The results showed the concentration of Pb in water (0.4923 ± 0.0091 mg / L - 0.6647 ± 0.0067 mg / L), in sediments (1.3803 ± ...

Rekayasa

The diffusion process is a limiting factor that key plays for the oxygen transfer mechanism in th... more The diffusion process is a limiting factor that key plays for the oxygen transfer mechanism in the pond water column. The purpose of this study was to determine of oxygen diffusion rate during the blind feeding period of intensive shrimp culture of vaname (L. vannamei). This research was conducted for 30 days blind feeding period of intensive vaname shrimp culture, the research using concept of expose facto causal design. Furthermore, the oxygen diffusion rate is calculated mathematically and a regression test is carried out on the associated water quality parameters. During the blind feeding period, the oxygen diffusion rate fluctuates and dynamically, with a diffusion rate ranging from 0.015-0.028 mgO2/L/hour. This condition is followed by a stabilizing and optimum condition of pond water quality parameter values throughout in the aquaculture. Diurnal periodically, the oxygen diffusion mechanism has an influence on the level of oxygen solubility in ponds. This relationship is modeled by the equation Y = 0.006 + 0.002x. This means that for each diffusion transfer increase of 1 mgO2/L/hour, there will be an oxygen increase in the ponds of 0.002 mg/L. The conclusion of this study is that the oxygen diffusion rate during the blind feeding period of intensive vaname shrimp culture obtained an average at 0.020 mgO2/L/hour, ranging from 0.018-0.023 mgO2/L/hour for 30 days of culture. From the results of this study, it is hoped that research can be developed study regarding of mechanisms, dynamics, and the effect of oxygen diffusion on the intensive shrimp farming ecology.

Environment Protection Engineering

Mansoura Journal of Forensic Medicine and Clinical Toxicology

Polish Journal of Environmental Studies

The whiteleg shrimp Litopenaeus vannamei is one of the most cultured penaeid species in Indonesia... more The whiteleg shrimp Litopenaeus vannamei is one of the most cultured penaeid species in Indonesia. However, a good standard of environment such as water quality characteristics for aquaculture must be met to avoid commercial loss. The aims of the study were to analyze the water quality in the aquaculture pond and their relationship with plankton dynamics and specific growth rate (SGR) of L. vannamei. A descriptive method with the analysis on the primary and the secondary data was performed to determine the effect of water quality on the abundance of plankton and the SGR of the whiteleg shrimp in the intensive pond. The results showed that the plankton abundance indicates that the pond is eutrophic and the water quality affects the plankton abundance. The regression analysis demonstrated that the abundance of phytoplankton was influenced (from the highest to the lowest regression coefficient) by the salinity (94.7%), orthophosphate (94.1%), temperature (91.8 %), CO 2 (80.3%), turbidity (66.1%), total organic matter (TOM, 35.2%) and ammonia (16.4%). On the other hand, the zooplankton abundance was significantly affected by the temperature (44.7%), turbidity (41.9%), dissolved oxygen (DO, 26.2%), salinity (14.9%) and TOM (7.2%). The parameters of water quality that affect SGR L. vannamei were ammonia (87.3%), zooplankton abundance (81.2%), TOM (74.9%), DO (63.1%), pH (48.9%), temperature (41%), turbidity (25.8%), salinity (19.4%), orthophosphate (13.2%),

Journal of Enviromental Engineering and Sustainable Technology

Electrical energy is one of the vital needs of the coastal communities, especially in coastal are... more Electrical energy is one of the vital needs of the coastal communities, especially in coastal areas that are not affordable electricity network. To meet these needs energy diversification efforts are undertaken, such as the utilization of the energy potential of ocean currents. The aim of this study was to determine the seabed morphology and properties of hydro-oceanography as a reference the exact location in the utilization of the energy of ocean currents. Location of research in the territorial waters of East Java. Research methods such as measurement of currents, tidal observation, observation of meteorological parameters and conditions of the seabed morphology and the coastal area of research. The study was conducted to estimate the potential energy of ocean currents are spatially and temporally by utilizing a hydrodynamic model simulation results and the results of current data measurement in the field, and convert them into power unit. Which will ultimately produced maps of potential energy from ocean currents of East Java waters territory. In comparison, there are several advantages of ocean current energy utilization compared to other energy generation, such as the production of electricity generated by ocean currents each year tend to be stable and more environmentally friendly because without using fuel. Potential sites for power plants in East Java waters of the ocean currents are respectively Madura Strait Region, Southern Water of East Java, and Bali Strait water.

International Journal Of Community Service

Health istitha'ah is the health ability of the pilgrims physically and mentally with a measur... more Health istitha'ah is the health ability of the pilgrims physically and mentally with a measurable health assesment. It is essential for every citizen who will perform the hajj pilgrimage. The Indonesian Ministry of Health through the Non-Infectious Disease Integrated Service Post (Posbindu PTM) implements an early detection and prevention program for non-infectious diseases in sub-districts, schools or colleges, institutions or workplaces, and Hajj guidance groups (KBIH) especially for pilgrims. The department of public health and community medicine (IKM-IKK) of the Faculty of Medicine, Sriwijaya University perform an education on the detection of risk factors for non-infectious diseases and physical fitness assesment of prospective pilgrims in the context of community service activities at KBIH Bisri Palembang. Examinations were done on 40 prospective pilgrims using the Rockport test method. The results of the examination showed that the 24 pilgrims had moderate fitness level (...

Biodiversitas Journal of Biological Diversity

One way to monitor water quality is by using biological indicators, namely epiphytic microalgae (... more One way to monitor water quality is by using biological indicators, namely epiphytic microalgae (periphyton). This study aims to analyze the epiphytic periphyton community structure and analyze the river health status using a saprobic index. The research location was in the Brantas River, Blitar District, East Java, Indonesia. The method used was a survey with sampling at three sites based on the purposive sampling technique. Periphyton samples were taken using the quadrant transect (5x5 cm²) method and then identified using the Lackey Drop Micro transect Counting Method. The results show that the periphyton community structure is in balance, and there are six divisions of 59 different genera. The six divisions found are Bacillariophyta, Cyanophyta, Chlorophyta, Charophyta, Ochrophyta, and Rhodophyta. The most identified genus is from the Bacillariophyta Division with 28 genera, while the least identified genus is the Rhodophyta division with 1 genus. The abundance ranges from 242,800-1,229,174 cells. cm-2 , the relative abundance index of periphyton ranges from 3-60% (site 1), 9-57% (site 2), 1-62% (site 3), the diversity index ranges from 1.212-2.617 (moderate), the uniformity index ranges from 0.307-2.151 (high), the dominance index ranges from 0.105-0.549 (moderate), and the saprobic index ranges from-0.18 to 0.55. Moreover, supporting water quality parameters are still optimal, except for ammonia and total organic matter parameters that exceed the quality standard. Based on the saprobic value obtained, the water quality of the Brantas River in Tawangrejo Village can be classified into the category of α/β-mesosaprobic to βmesosaprobic saprobic levels with mild to moderate levels of pollution.

Plant Stress Physiology

The major wheat-producing countries have heterogeneous and fragile agro climatic surroundings but... more The major wheat-producing countries have heterogeneous and fragile agro climatic surroundings but frequently restraining wheat yield and quality losses are predominant under heat and drought prone agriculture exclusively when both stresses occur in blend, which looms the food security globally. However, many suggested examples are available in these countries for the mitigation of these two stresses by using different conventional and modern improvement and agronomic approaches. In addition to these approaches, morphological, physiological, anatomical, biochemical, phenological, and physiochemical vicissitudes, which trigged during these stresses, have also been elucidated. There complete deliberation in combination for wheat improvement is still a contest, but a win-win option is a holistic attitude in future.

Journal of Ecological Engineering

Mangroves are a crucial ecosystem in coastal areas and serve a significant ecological function. H... more Mangroves are a crucial ecosystem in coastal areas and serve a significant ecological function. However, this ecosystem is under the continuous pressure of anthropogenic activities which create toxic contaminants, such as heavy metals. The presence of marine ports and electric steam power plants next to Bee Jay Bakau Resort (BJBR) Mangrove Forest may worsen the heavy metal pollution, especially in the case of non-essential metals like lead (Pb). The vegetation in mangrove ecosystems can help store and trap this contaminant. Therefore, the objective of this study was to determine the potency of the Avicennia alba and Rhizopora mucronata mangrove species, which dominate the mangrove vegetation in BJBR Mangrove Forest, as Pb phytoremediation agents. The samples were taken from the sediment, roots, stems, and leaves of the mangrove trees. The results showed that the Pb found in the sediment of these species ranged from 10.323 to 11.071 ppm, while the Pb concentration in the mangrove parts was less than 1 ppm with the order roots > stems > leaves. Furthermore, the statistical analysis indicated that there were no statistically significant differences in the Pb values across sites and species. Moreover, the BCF, BAC, and TF in this study were less than 1, making the observed mangrove species unsuitable for phytoextraction or phytostabilization.

Journal of Ecological Engineering

This study aims to analyze the lipid, carbohydrate and protein content of Chlorella pyrenoidosa a... more This study aims to analyze the lipid, carbohydrate and protein content of Chlorella pyrenoidosa after being treated with the tofu wastewater. The method used in this study was an experimental method with 4 treatments and 3 replications. The treatment was performed by administering different concentrations of the tofu wastewater to the C. pyrenoidosa. The concentrations used were 10%, 15% and 20%. Determination of these concentrations was based on the preliminary test. The main parameters observed were the lipid, carbohydrate and protein content of C. pyrenoidosa and the supporting parameters were the growth rate, doubling time and characteristics of the tofu wastewater. The study was conducted for 8 days using the batch culture method. In the exponential phase, the microalgae were harvested and then their contents were analyzed. The data obtained were analyzed using MS Office Excel 2016. The highest content of lipid, carbohydrate and protein of C. pyrenoidosa was in the treatment of 20% tofu wastewater, reaching 1.56%; 28.92%; and 28.92%, respectively. Meanwhile, the highest growth rate and the smallest doubling time in the treatment of 20% tofu wastewater accounted for 0.8264 day-1 and 0.0349 hours-1. Moreover, the rates of BOD and TSS of the tofu wastewater at the end of the study decreased. It can be concluded that administering different concentrations of the tofu wastewater can affect the lipid, carbohydrate and protein content of C. pyrenoidosa. It was suggested that further research is needed to conduct semi-continuous cultivation of C. pyrenoidosa using a higher density so that the results obtained can be optimized.

Research Journal of Life Science

Jatigede Reservoir in Sumedang Regency is a land mass planning designed as a multi-function reser... more Jatigede Reservoir in Sumedang Regency is a land mass planning designed as a multi-function reservoir. The main water source for this reservoir is from Cimanuk River, which flows through Garut Regency, and has many industrial activities around the river flow. This research was conducted to assess the trophic status of water pollution in Jatigede Reservoir by utilizing plankton as a bioindicator agent. Samples were collected from 9 observation stations from November 2018 until January 2019. The results showed that 26 species of phytoplankton from 7 divisions including Dinophyta, Cyanophyta, Chlorophyta, Chrysophyta, Euglenophyta, Bacillariophyta, and Charophyta was found in Jatigede Reservoir at about 461 ind/m3. Zooplankton abundance of 6 species from 2 divisions of Rotifera and Copepoda at 2 ind/m3. The average phytoplankton diversity index was 0.93 and zooplankton diversity index was 0.23. The average phytoplankton evenness index was 0.44 and zooplankton evenness index was 0.24. T...

Biodiversitas Journal of Biological Diversity

Nile tilapia (Oreochromis niloticus) has been commonly cultured all over the world, especially in... more Nile tilapia (Oreochromis niloticus) has been commonly cultured all over the world, especially in Indonesia, due to high market demand. The success of Nile tilapia culture production depends on the fish growth during cultivation as well as pond environment. Many studies have revealed that quality of water strongly affects fish growth in an aquaculture pond. This study aims to investigate the relationship among water quality like Physico-chemical (temperature, transparency, pH, dissolved oxygen, carbon dioxide, nitrate, and phosphate) and biological (phytoplankton abundance) factors and the specific growth rate of Nile tilapia in a freshwater cultivation pond in Batu City, Indonesia. The data was analyzed using the path model. Results indicated that the most significant factor for fish growth was the phytoplankton abundance. However, since nitrate and phosphate also played roles as determinants of phytoplankton abundance, they can be considered indirect water quality factors of Nile tilapia growth.

Biodiversitas Journal of Biological Diversity

Whiteleg shrimp (Litopenaeus vannamei) is a popular aquaculture species in Indonesia due to its h... more Whiteleg shrimp (Litopenaeus vannamei) is a popular aquaculture species in Indonesia due to its high market demand. It requires excellent water quality to ensure its growth rate and production. Therefore, intensive culture system is considered. However, the system threatens the sustainability of the adjacent environment and thus proper water treatment is necessary to increase the quality of water used in shrimp farming as well as the wastewater it produces. In this study, we explored the use of a silvofishery system that integrates mangroves into a pond as a potential solution to this issue. This study aimed to assess the effectiveness of the silvofishery system at treating water inputs and effluents of a whiteleg shrimp pond in Probolinggo District, East Java, Indonesia. Eight physicochemical water quality parameters and a phytoplankton community at four sampling sites during neap tide period were examined in this study. The effectiveness of the silvofishery system in increasing water quality was analyzed using analysis of variance (ANOVA), while t he diversity of phytoplankton for biomonitoring was measured with the Shannon-Wiener diversity index (H'). The results showed that the mangrove effectively increased the quality of the water supply and wastewater in the intensive whiteleg shrimp pond-especially in terms of nutrient removal-as well as the biodiversity of its phytoplankton community. Other parameters such as TOM and ammonia also decreased, though this was not statistically proven.

Asian Journal of Scientific Research

Omni-Akuatika

Milkfish is potential fish with high production and belong to ten of fish commodities culture in ... more Milkfish is potential fish with high production and belong to ten of fish commodities culture in Indonesia. Pond stability of milkfish especially in fingerling phase (young phase) influenced by several factors including water quality and organism availability (periphyton). This recent study aimed to assess the milkfish traditional pond stability in fingerling phase based on water quality and periphyton availability aspects. These aspects are quite important to milkfish production and their growth as well as their food habit. The research was conducted in traditional pond located in UPT Fisheries Brackish and Saline Water Probolinggo for three months. Water quality and periphyton analyses were in situ and ex situ. The result shows that all the water quality is belong to good condition (stable) except in ammonia, TOM, and orthophosphate. However, this fluctuated value is not significantly impacting to the living organisms (milkfish). The research concluded that the fingerling milkfish...

DIKEMAS (Jurnal Pengabdian Kepada Masyarakat)

Kabupaten Tuban merupakan salah satu wilayah percontohan industrialisasi tambak udang khususnya u... more Kabupaten Tuban merupakan salah satu wilayah percontohan industrialisasi tambak udang khususnya udang vanamei. Desa Temaji merupakan salah satu desa di Tuban yang memiliki potensi budidaya udang vanamei untuk dikembangkan. Pembudidaya udang vanamei bernaung pada Kelompok tani Riswada. Tujuan pelaksanaan pengabdian di Desa Temaji adalah berbagi pengetahuan, peningkatan pemahaman dan keterampilan mitra dalam peningkatan teknologi semi intensif di tambak budidaya udang vanamei, pemantauan kualitas air melalui pelatihan pengukuran kualitas air, dan proses budidaya udang vanamei melalui pemanfaatan teknologi tepat guna dengan introduksi alat automatic feeder (autofeeder) secara mandiri. Pengabdian masyarakat ini terlaksana berdasarkan permasalahan yang terjadi pada mitra terkait kegiatan budidaya udang vanami seperti proses budidaya yang dilakukan oleh mitra masih secara tradisional/ekstensif dan efesiensi pakan yang masih rendah karena pemberian pakan masih secara konvensional.Kata Kunc...

Journal of Business Management and Economic Research

This study examines the impacts of E-CRM features on customer satisfaction and perceived usefulne... more This study examines the impacts of E-CRM features on customer satisfaction and perceived usefulness as a mediator variable within e-commerce sector of Turkey. E-commerce businesses are operating in constantly changing environment and trends, thus E-CRM features may serve not only as a way for maintaining stable relationship with customers, but as tool for gaining competitive advantage that leads to customer satisfaction. Within the framework of this study quantitative research methods were applied. Primary data from 210 respondents has been collected through self-administered, Likert type online survey. Research model constructs were evaluated and analysed with a help of confirmatory factor analysis (CFA) and structural equational model (SEM). The findings of the study indicated that E-CRM features represented in current research (complaint handling, communication, information content, security and privacy) demonstrate both direct and indirect impact (through perceived usefulness variable) on customer satisfaction.

Masalah-Masalah Hukum

Perbedaan penalaran hakim memutus perkara korupsi pemberian kredit yang terjadi di Bank Riau-Kepr... more Perbedaan penalaran hakim memutus perkara korupsi pemberian kredit yang terjadi di Bank Riau-Kepri,menjadi persoalan yuridis ketika menentukan kesalahan perbuatan turut serta para terdakwa. Permasalahan yang diteliti adalah tentang konstruksi pemikiran hakim menentukan unsur tindak pidana dan kesalahan para terdakwa. Urgensi penelitian ini untuk memahami pilihan prakis hakim menggunakan ajaran penyertaan, ketika menerapkan Pasal 55 KUHP dalam mengadili perbuatan turut serta. Pendekatan penelitian yang digunakani yuridis empiris dengan spesifikasi penelitian hukum normatif. Temuan penelitian, bahwa perbuatan pemberi kredit dari Bank Riau-Kepri terbukti bersalah dan dipidana. Penerima kredit diputus lepas dari segala tuntutan hukum. Konstruksi penalaran hakim, perbuatan penerima kredit tidak dapat dipertanggungjawabkan secara pidana karena perbuatan yang terbukti masuk dalam lingkup hukum perdata.

Samakia : Jurnal Ilmu Perikanan

Lead is one of the heavy metals of pollutant sources that are highly toxic and can not be degrade... more Lead is one of the heavy metals of pollutant sources that are highly toxic and can not be degraded thus accumulating in sediments and aquatic organisms including Tubifex worms. The objectives of the study were to determine the concentration and to analyze the correlation of lead concentration (Pb) contained in water, sediments and Tubifex worms. The research method used is survey. Samples were taken at the waters of the landfill. The determination of lead concentration (Pb) was used by Atomic Absorption Spectrophotometer (AAS) method. The results of measurements of lead concentration (Pb) in water, sediments and Tubifex worms tabulated in tables and graphs, were analyzed descriptively. To prove that the increase of Pb concentration in Tubifex worms along with the increase of Pb content in water and sediment, a simple linear regression analysis was performed. The results showed the concentration of Pb in water (0.4923 ± 0.0091 mg / L - 0.6647 ± 0.0067 mg / L), in sediments (1.3803 ± ...