scholarly journals Physical and chemical parameters of selected river waters in Davao City

10.17158/524 ◽  
2016 ◽  
Vol 19 (2) ◽  
Author(s):  
Noel V. Laud ◽  
Hanah Jane R. Rosel ◽  
Jonal T. Bungabong ◽  
Terence Jay M. Resada ◽  
Kenler S. Alonsagay ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Comparative Method ◽  
Water Discharge ◽  
Sediment Discharge ◽  
Chemical Parameters ◽  
River Waters ◽  
Physical And Chemical Parameters ◽  
Ph Level ◽  
Physical And Chemical

The rapid increase in population, urbanization, and industrialization reduces the quality of Philippine waters, especially in densely populated areas and regions of industrial and agricultural activities. In Davao City, there is a need to regularly monitor the quality of river waters to assure their normal conditions. This study assessed the water conditions of  Talomo River and Davao River. Specifically, it aimed to measure the changes in pH level, dissolved oxygen, water temperature, coliforms and transparency. A descriptive comparative method was used to evaluate the waters of the two rivers, specifically in terms of contaminants and other pollutants. In gathering data, the researchers implemented the standard chemical and physical protocols on pH level, dissolved oxygen, Coliforms, Temperature, Transparency and Visual, daily water discharge and sediment discharge measurements. Findings revealed that the waters from the two rivers have high alkalinity; with dissolved oxygen greater than 7.5 mg/L; high fecal coliform count in CFU at 16,000 colonies per 100 mL; high degree of turbidity; experience drastic change of temperature; and indicate an increase of water discharge after the rain. It also showed disparity in sediment discharge with Davao River reporting a greater value compared to Talomo River. These parameters indicate that the two rivers have deteriorated in terms of quality waters when compared to the previous assessments as reported by Environmental Management Bureau (EMB).<div> </div><strong>Keywords:</strong>Physical and chemical parameters, Davao river, Talomo river, descriptivecomparative, Davao City, Philippines.

Effects of the Degree of Maturity on the Chemical Composition, Physical Characteristics and Sensory Attributes of Peach (Prunus persica) cv. Caterin

2005 ◽  
Vol 11 (5) ◽  
pp. 345-352 ◽  
Author(s):  
A. I. Cascales ◽  
E. Costell ◽  
F. Romojaro
Keyword(s):  
Sensory Quality ◽  
Prunus Persica ◽  
Sensory Attributes ◽  
Soluble Solids ◽  
Chemical Parameters ◽  
Colour Intensity ◽  
Physical And Chemical Parameters ◽  
Degree Of Maturity ◽  
Physical And Chemical

Sensory quality of peach during ripening to assess the best state for consumption was analysed. Physical and chemical parameters commonly used for establishing the commercial quality of this fruit were also determined: Soluble solids, acidity, sugars, organic acids, chlorophyll, carotenoids, resistance to compression and to penetration and colour. Relationships among these parameters and sensory characteristics were also analysed. A panel of eight trained assessors evaluated intensities of 12 sensory attributes (1 for odour, 2 for colour, 4 for flavour and 5 for texture). The sensory attributes selected allowed the description of perceivable differences between peaches of different degrees of maturity, although the variation in intensity of the attributes followed different trends. Colour intensity increased and acidity, firmness and crispness decreased significantly with ripening. Intensity of flavour, sweetness and fruitiness increased significantly from the under-ripe to semi-ripe states, and then decreased on reaching ripeness. It can be concluded that the most suitable time for harvesting and consumption of this peach variety was the state described herein as semi-ripe, and that a high correlation existed between colour intensity and hardness and the instrumental measurements of colour and texture.

Commodity science and examination of meat products. Laboratory workshop

2018 ◽  
Author(s):  
Юлия Данильчук ◽  
YUliya Danilchuk
Keyword(s):  
Meat Products ◽  
Regulatory Framework ◽  
Laboratory Work ◽  
Educational Institutions ◽  
Chemical Parameters ◽  
Higher Educational Institutions ◽  
Regulatory Documents ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical

In this workshop the work on the study of the classification, assortment and expertise of the quality of meat and meat products. Each Chapter provides an overview of the relevant types of products and a list of the main regulatory documents required for their examination. The latest changes in the regulatory framework have been taken into account. Laboratory work on the examination of products include tasks for the study of defects, acceptance rules and methods of sampling, marking analysis, evaluation of the quality of goods by organoleptic and physical and chemical parameters. For students of higher educational institutions studying in the direction of preparation 38.03.07 "commodity science".

scholarly journals Counseling on Good Water Quality for the Cultivation of Batak Fish in Toba Lake Waters

2021 ◽  
Vol 2 (1) ◽  
pp. 23-26
Author(s):  
Herna Febrianty Sianipar ◽  
Theresia Monika Siahaan ◽  
Apriani Sijabat
Keyword(s):  
Carbon Dioxide ◽  
Water Quality ◽  
Dissolved Oxygen ◽  
Fish Farming ◽  
Chemical Parameters ◽  
Measuring Devices ◽  
Physical And Chemical Parameters ◽  
Lake Waters ◽  
Physical And Chemical ◽  
Very High

This service aims to provide information about the value of good water quality and demonstrate directly the tools used to measure it which aim to cultivate Batak fish based on biological, physical and chemical parameters such as temperature, dissolved oxygen, carbon dioxide, pH, and provide information on the names of measuring devices. . This service has been carried out in Gorat Village, Toba Samosir Regency with the method of counseling and material discussion (exposure and question and answer), as well as the practice of measuring water quality externally and analyzing the results of its value. The results of the counseling show that many fish farmers do not understand the value of good water quality for batak fish cultivation and not many know the equipment that can be used to check water quality. From this counseling, it can be seen that the interest of fish farmers and the community is very high, and they become more aware of the value of good water quality for fish farming and know the equipment. Abstrak Pengabdian ini bertujuan untuk memberikan penyuluhan tentang nilai kualitas air yang baik dan mendemonstrasikan langsung alat yang digunakan mengukurnya yang bertujuan untuk membudidayakan ikan batak berdasarkan parameter biologi, fisika dan kimia seperti suhu, oksigen terlarut, karbondioksida, pH, serta memberikan informasi nama alat-alat pengukurnya. Pengabdian ini telah dilakukan di Desa Gorat, Kabupaten Toba Samosir dengan metode penyuluhan dan diskusi materi (paparan dan tanya jawab), serta praktek pengukuran kualitas air secara eksitu dan menganalisis hasil nilainya. Hasil penyuluhan menunjukan bahwa banyaknya petani ikan yang belum paham tentang nilai kualitas air yang baik untuk budidaya ikan batak serta belum banyak yang mengetahui peralatan yang dapat digunakan untuk memeriksa kualitas air. Dari penyuluhan ini terlihat animo petani ikan dan masyarakat sangat tinggi, dan mereka menjadi lebih paham tentang nilai kualitas air yang baik untuk budidaya ikan serta mengetahui peralatannya.

scholarly journals The Diversity of Makrozoobenthos as Bio-Indicators of Water Quality of the River Kundur District Labuhanbatu

2021 ◽  
Vol 4 (1) ◽  
pp. 1027-1033
Author(s):  
Winarti Winarti ◽  
Arman Harahap
Keyword(s):  
Total Abundance ◽  
Chemical Parameters ◽  
Observation Station ◽  
Physical Chemical ◽  
Physico Chemical ◽  
Physical And Chemical Parameters ◽  
The Individual ◽  
Physical And Chemical ◽  
Chemical Water

Macrozoobenthos used as a bioindicator of the waters, this happens because of the nature of the benthos which has mpergerakan low so it got a lot of influence from the environment. This study aims to determine the condition of the river Kundur with a view the community structure of macrozoobenthos which include: species composition, abundance, diversity, uniformity and dominance as well as the physical and chemical parameters of water as a paremeter supporters. Based on the results of observations, macrozoobenthos were found during the study in the river Kundur consists of 3 phylum, 4 classes, 17 family with 11 species. The composition of the class of macrozoobenthos in the whole of the observation station consists of a Gastropod (37%), Insecta (23%), Malacostraca (20%), Polychaeta (10%) dan Malacostraca (20%). The value of an abundance ranged from 325,7 - 3309,6 ind/m3. With the value of the total abundance at Station I which is equal to 3690,1 ind/m3, Station II 3723,1 ind/m3, Station III 3692,3 ind/m3 can be categorized diversity are light polluted with the value of the index of uniformity (E) that describes the spread of the individual tends to be uniform or relatively the same. While the condition of the physical-chemical parameters and the substrate bottom of the river Kundur in general has a range of relatively homogeneous, spread evenly throughout the observation stations and still be able to support life macrozoobenthos. To the results of measurements of the parameters of physico-chemical water and substrate in the river kundur in general has a range of relatively homogeneous in the whole observation stations and still be able to support the life of the macrozoobenthos.

OPTIMIZATION OF INULIN CONTENT IN THE FORMULATION OF SOFT WAFERS ON BASED WHEAT FIBER

2020 ◽  
Author(s):  
Р.З. СХАШОК ◽  
Ю.Н. ФИЛИППЕНКО ◽  
Н.А. ТАРАСЕНКО
Keyword(s):  
Dietary Fiber ◽  
Quality Indicators ◽  
Control Sample ◽  
Chemical Parameters ◽  
Organoleptic Evaluation ◽  
Physical And Chemical Parameters ◽  
Quality Of Products ◽  
Physical And Chemical ◽  
Optimal Quality

Исследовано влияние инулина, внесенного в рецептуру мягких вафель взамен части сахара, на качество изделий. Раствор инулина Beneo (Orafti) GR вносили в тесто в количестве 3, 5 и 7% к массе муки. Контролем был образец мягких вафель без добавки инулина. Одновременно с инулином во все образцы вносили пшеничные пищевые волокна Камецель FW 200 в количестве 15% к массе муки. На основе исследования физико-химических показателей влажности и плотности тестовых заготовок, а после их выпечки – намокаемости и влажности готовых изделий установлено, что оптимальные показатели качества имел образец мягких вафель с 5-процентным содержанием инулина. По разработанной рецептуре изготовлены мягкие вафли с добавкой пшеничных волокон и установленным количеством инулина. Проведена органолептическая оценка изделий, определено содержание основных пищевых веществ. Установлено, что мягкие вафли, в рецептуру которых внесены пшеничные волокна Камецель FW 200 и инулин Beneo (Orafti) GR, дольше сохраняют свежесть, содержат на 15% меньше жира, на 6% больше белка и на 8% менее калорийны по сравнению с контрольным образцом. The effect of inulin added to the formulation of soft wafers instead of sugar on the quality of products was studied. Beneo (Orafti) GR inulin solution was added to the dough in an amount of 3, 5 and 7% by weight of flour. A sample of soft wafers without inulin supplementation was a control. Wheat dietary fiber Kametsel FW 200 in an amount of 15% by weight of flour was added simultaneously with inulin to all samples. On the basis on the study of physical and chemical parameters of humidity and density of test blanks, and after baking-wetness and humidity of finished products, it was found that a sample of soft wafers with 5% inulin content had optimal quality indicators. According to the developed recipe, soft wafers with the addition of wheat fibers and a set amount of inulin are made. Organoleptic evaluation of products was carried out, the content of the main food substances was determined. It was found that soft wafers with wheat fiber Kamenzel FW 200 and inulin Beneo (Orafti) GR added to the recipe retain freshness longer, contain 15% less fat, 6% more protein and 8% less calories compared to the control sample.

The structure and composition of macrozoobenthos community in varying water qualities in Kalibaru Waters, Bengkulu, Indonesia

2020 ◽  
Vol 22 (1) ◽  
Author(s):  
Lilisti LILISTI ◽  
Zamdial ZAMDIAL ◽  
Dede Hartono ◽  
Bieng Brata ◽  
Marulak Simarmata
Keyword(s):  
Human Activities ◽  
Aquatic Ecosystem ◽  
Chemical Parameters ◽  
Aquatic Life ◽  
Physical And Chemical Parameters ◽  
Ecological Threshold ◽  
Medium Level ◽  
The Government ◽  
Physical And Chemical

Abstract. Lilisti, Zamdial, Hartono D, Brata B, Simarmata M. 2021. The structure and composition of macrozoobenthos community in varying water qualities in Kalibaru Waters, Bengkulu, Indonesia. Biodiversitas 22: 106-112. Various human activities affect the quality of the aquatic ecosystem that can be assessed by measuring the physical, chemical, and biological parameters of the waters and sediments. This is the case of Kalibaru Waters, Bengkulu, Indonesia which shows changes in the estuary and marine ecosystems due to the cut-off of the main river around the area for the development of roads and bridges. The objective of this study was to analyze the quality of the waters and substrate, and the structure of the macrozoobenthos community as a bioindicator at the Kalibaru Waters. A survey was carried out in four stations, which was purposively selected based on human activities around the waters. Data collected included the physical and chemical parameters, and the diversity and density of macrozoobenthos species. The density of macrozoobenthos species was analyzed for summed dominance ratio (SDR), diversity (H'), homogeneity (E), and dominance (D) indices. The results showed that the physical and chemical parameters of Kalibaru Waters were acceptable for aquatic life, however, the oil contents at two stations exceeded the ecological threshold. Analysis of the macrozoobenthos community as a bioindicator for water quality found that the diversity and homogeneity indices were at a medium level indicating an unstable community, while the dominant index remained low indicating that none of the species was dominant in the Kalibaru Waters. This information is needed as a reference for the government of Bengkulu Province to make appropriate policies and management decisions to maintain the quality of the aquatic ecosystem in Kalibaru Waters.

scholarly journals Evaluation of the Ecological Impact of Human Settlement on the Water Quality of Lower Cross River, Nigeria

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
B. J. Oribhabor ◽  
O. M. Udoidiong ◽  
D. F. Udoh ◽  
B. E. Akpan
Keyword(s):  
Water Quality ◽  
Ecological Impact ◽  
World Health ◽  
Human Settlement ◽  
Chemical Parameters ◽  
Cross River ◽  
Cross River State ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical

The ecological impact of human settlement on the water quality of Lower Cross River, Nigeria was evaluated. The physical and chemical conditions of the river water were determined from January to August, 2011. Three stations comprising Itu in Akwa Ibom State with intense human activities (station 2), its upstream (without human settlement) at Cross River State (station 1) and the downstream (station 3) were sampled. The Parametric One Way Analysis of Variance (ANOVA) indicated that of the 17 physical and chemical parameters determined, only water level and COD were found to be significantly different () among stations. The spatial variations in the level of significant correlation of the physical and chemical parameters among the stations and the higher level of interrelationship in downstream station 2 and 3 than station 1 could be attributed to inputs resulting from human settlement. Comparison between some parameters with Standard Organization of Nigeria, and World Health Organization maximum permitted levels for drinking water indicated that the water was not polluted. However, the BOD and COD concentrations of greater than 2 mg/L and 20 mg/L respectively were indicative of pollution.

scholarly journals Kualitas dan distribusi spasial karakteristik fisika-kimia Sungai Siak di Kota Pekanbaru

DEPIK ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 335-343
Author(s):  
Luri Anita Vanri ◽  
Adriman Adriman ◽  
Muhammad Fauzi
Keyword(s):  
Water Quality ◽  
Fecal Coliform ◽  
Principal Component ◽  
Ex Situ ◽  
Chemical Parameters ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical ◽  
Main Factor

Siak River is one of the biggest rivers and the deepest in Riau Province in Indonesia with its 20-30 depth and depth 370 kilometers. The Siak River used for bathing, washing, dumping industrial palm oil, plantation, domestic waste, and port so it has an impact on water quality changing. This study analyzed the water quality and distribution spatial physical and chemical parameters the river around in Pekanbaru city, using Principal Component Analysis (PCA), this study used laboratory in situ and ex situ water quality measurement instruments. Water sampling each station done three times in two weeks during October to November 2019. The results obtained from this study shows the water quality of these 6 stations in the category of bad and the water quality from headwaters to downstream river influenced by organic parameter as a dominant pollutant. The correlation of water quality characteristic was 74.4% main factor 1 (F1) 47.4% and main factor 2 (F2) 26.7% with main characteristics fecal coliform, phosphate, and nitrate. Grouping these characteristics through a dendrogram showed three levels of relationship based on the characteristic parameter. The first group stands for station 1,2, and 4 have higher brightness and Dissolved oxygen (DO) parameters than other stations. The second group stands for stations 3 and 5 that have relatively high in parameter phosphate and nitrate. The third group is station 6 (river estuary) which results in shows high of fecal coliform proportional to pollution. The study can be concluded that three groups heavily contaminated. Each group has different parameters that show influence upland and waters activities.Keywords: Distribution of spatial, The quality of water, Siak River, Physical and Chemical Parameters, PCA ABSTRAKSungai Siak merupakan salah satu sungai terbesar di Provinsi Riau dan terdalam di Indonesia, dengan kedalaman sekitar 20-30 meter dan panjang 300 kilometer. Sungai siak masih dimanfaatkan oleh masyarakat sebagai sarana Mandi Cuci Kakus (MCK), tempat buangan limbah industri kelapa sawit, perkebunan, rumah tangga dan pelabuhan, sehingga berdampak pada perubahan kualitas perairan. Penelitian dilakukan untuk menganalisa kualitas dan distribusi spasial karateristik fisik-kimia perairan Sungai Siak di sekitar Kota Pekanbaru, dengan menggunakan Principal Component Analysis (PCA). Kajian menggunakan instrument pengukuran kualitas air in situ dan ex situ di laboratorium. Pengambilan sampel air pada masing-masing stasiun dilakukan sebanyak tiga kali setiap dua minggu selama bulan Oktober hingga November 2019. Hasil yang diperoleh dari kajian ini adalah kualitas air di keenam stasiun masuk dalam katagori buruk dan mengalami penurunan kualitas dari hulu ke hilir yang disebabkan bahan organik. Korelasi karakteristik kualitas air sebesar 74,3%, faktor utama 1 (F1)  47,4% dan faktor utama 2 (F2) 26,7% dengan penciri utama fecal coliform, fosfat dan nitrat. Pengelompokan stasiun pada dendogram klarifikasi hierarki menunjukkan adanya tiga tingkat hubungan kekerabatan berdasarkan parameter pencirinya. Kelompok satu terdiri dari stasiun 1, 2 dan 4 memiliki hasil relatif tinggi pada parameter kecerahan dan oksigen terlarut (DO) dibandingkan dengan stasiun lainnya. Kelompok dua terdiri dari stasiun 3 dan 5 memiliki hasil relatif tinggi pada paramter nitrat dan fosfat dibandingkan dengan stasiun lainnya. Kelompok tiga adalah stasiun 6 (muara sungai sail) dengan parameter fecal coliform relatif tinggi yang berbanding lurus dengan tingkat pencemarannya. Berdasarkan hasil kajian dapat disimpulkan bahwa tiga kelompok sama-sama tercemar berat, namun masing-masing kelompok memiliki perbedaan parameter pencirinya yang memperlihatkan pengaruh berbagai aktifitas di darat maupun di perairan itu sendiri.Kata kunci: Distribusi spasial, Kualitas air, Sungai Siak, Parameter fisika dan kimia, PCA

scholarly journals ANALISIS KESESUAIAN PERAIRAN UNTUK BUDIDAYA IKAN KERAPU BEBEK (Cromileptes altivelis) DI PERAIRAN PULAU TEGAL TELUK LAMPUNG

2018 ◽  
Vol 6 (2) ◽  
pp. 719 ◽  
Author(s):  
Desti Rizki Anggraini ◽  
Abdullah Aman Damai ◽  
Qadar Hasani
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Depth ◽  
Current Velocity ◽  
Sampling Location ◽  
Selling Price ◽  
Chemical Parameters ◽  
Foreign Markets ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical

Tegal Island is part of Lampung Bay which has potential to be the location of aquaculture. One of kind fish that can be cultivated in these area is the humpback grouper (Cromileptes altivelis). Humpback grouper is the most popular fish species in local and foreign markets that have the highest selling price. The purpose of this study were to know the physical and chemical parameters in Tegal Island waters, to know the suitability of the waters for the humpback grouper cultivation in the waters of Tegal Island. The research was conducted in May 2017. The sampling location was 4 stations. The range of water quality values in Tegal island were water depth (15-25 m), dissolved oxygen (7 – 8 mg/l), brightness (5-10 m), salinity (30-34 ppt), temperature (28 – 32°C ), current velocity (20 – 50 m/s), pH (7,7 – 8,0), nitrate (0,9 – 3,2 mg/l) and phosphate (0,2 – 0,5 mg/l). The results showed that the waters of Tegal Island had appropriate water suitability level (St 3), corresponding marginally (St 1 and St 2) and unsuited (St 4) for the cultivation of humpback grouper.

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