scholarly journals Quality of potatoes grown in various regions of Serbia as influenced by heavy metal and pesticide residues concentrations

2002 ◽  
Vol 47 (2) ◽  
pp. 161-177 ◽  
Author(s):  
Milos Rajkovic ◽  
Lidija Peric ◽  
Divna Kovacevic
Keyword(s):  
Heavy Metal ◽  
Ph Value ◽  
Starch Content ◽  
Potato Production ◽  
Fertilizer Application ◽  
Raw Material ◽  
Current Season ◽  
Metal Contents ◽  
Chemical Procedure

It is possible to decompose starch into monosaccharides by the method of acid starch hydrolysis. By applying appropriate chemical procedure, a main solution is obtained, from which aliquots are taken after filtration to determine of the present glucose according to Luff-Shoorlu method. The analysed potatoes of cv. Desiree, grown on various sites in Serbia, have starch content that corresponds to available literature data. The highest starch content is found in potatoes from Ivanjica and Novi Pazar, i.e. from the areas where climate factors, air temperature, and land relief are favourable for potato growing. Lower starch contents are found in potatoes grown in flat areas with warmer climate and drier periods. Those are sites in PKB-Belgrade, Smederevo, Dobanovci and Mrcajevci areas, where the values obtained by experimental procedure are very similar. The lowest starch content is found in potatoes from Belegis and Guca sites, where starch content is lower than normal from literature values, which may be explained by some special causes (climate, location, irrigation). On the basis of heavy metal contents in potato samples, it may be concluded that potatoes originating from sites famous for potato production are contaminated with Cd the content of which exceeds concentrations permitted by regulations. The presence of Cd in potato samples may also be explained by the application of phosphate fertilizers in higher (or recommended) rates. However, the soil itself should also be investigated, especially concerning the content of Cd and pH value. Thus, the influence of the soil itself should be established compared to fertilizer application in the current season. Presence of Cd in potatoes, on the other hand, is highly unfavourable because it prevents its utilization in nutrition, but also as a raw material for further processing of products based on potatoes: chips, etc. Also, Cd presence in foods is strictly controlled by EU, which prevents possible export of products based on potatoes containing Cd. Analyses of lindane and bensultap (Bancol) pesticides indicate that they are not within critical values, nor in such quantities to affect human health, so, from this aspect, the analysed potato samples from all sites are absolutely suitable for consumation.

PENGARUH ASAM FULVAT TERHADAP PERTUMBUHAN, PRODUKTIVITAS, DAN MUTU RIMPANG JAHE

2020 ◽  
Vol 7 (1) ◽  
pp. 6
Author(s):  
MUHAMAD DJAZULI ◽  
IRENG DARWATI ◽  
ROSITA SMD
Keyword(s):  
Fulvic Acid ◽  
Starch Content ◽  
Block Design ◽  
Organic Fertilizer ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Randomized Block Design ◽  
Application Frequency ◽  
Optimal Effect

Fulvic acid is an extraction product of humus which is very potential for supplement fertilizer and able to reduce either inorganic or organic fertilizer application. The information about fulvic acid application as supplement fertilizer on ginger in Indonesia is still limited. The objective of the study was lo find oul the efect of fulvic acid as supplement fertilizer on the growth, productivity and quality of young ginger. A green house trial was conducted from July lo November 1996. Five levels of fulvic acid concentration, 0, 2.5, 5, 7.5, and 10% were sprayed every week from 4 to 1 5 weeks ater planting (WAP). A randomized block design was used with five replicates. The results indicated that the growth of plant height and number of tiller of ginger increased rapidly al 8 WAP, then il became slowly from 12 lo 1 5 WAP Application 10% of fulvic acid was able to increase vegetative parts 99.6%, fresh and dry weight of rhizome 89 and 125% respectively, and starch content of rhizome 22.6%. To find oul of the optimal effect of fulvic acid on productivity and quality of ginger, a further research using higher level and application frequency of fulvic acid as an extract product from several humus types in Indonesia is needed.

scholarly journals Analisis Kualitas Bioetanol Dari Kulit Pisang

2021 ◽  
Vol 4 (2) ◽  
pp. 35
Author(s):  
G M Saragih ◽  
Hadrah Hadrah ◽  
Dilla Tri Maharani
Keyword(s):  
Fermentation Process ◽  
Starch Content ◽  
Soil Surface ◽  
Raw Material ◽  
Banana Peel ◽  
Total Production ◽  
Bioethanol Production ◽  
Fermentation Time ◽  
Banana Production

Indonesia is ranked sixth in banana production with total production in 2015 of 7.299.275. the more people who like bananas, the higher the volume of banana peel waste produced. Banana peels are usually thrown away immediately and can contaminate the soil surface because banana peels contain acid so that it can have an impact on evironmental problems. The starch content of banan peels has the potential to be used as a raw material for bioethanol production with the help of the fermentation process. Therefore this research aims to determine the quality of bioethanol which is produced from several types of banana peels. The types of banana peels used are Ambon banana peel, Barangan banana peel and horn banana peel. The method used to manufacture bioethanol form the types of banana peel of ambon, barangan and horn is fermentation using yeast tape or saccharomyses cereviciae. The variables observed in this study were the variety of banana peel types, fermentation time for 6 days and 10 days, and the use of yeast as much as 5 grams. The fermentation results in the form of bioethanol were analyzed using gas chromatography, the best results from this study were obtained on the type of banana peel of Ambon for 10 days, that is 4.451% bioethanol.

scholarly journals Microbial Succession and Chemical Characteristics in Fermentation of Ambonese Arrack (Sopi), Traditional Beverage from Maluku

2020 ◽  
Vol 12 (2) ◽  
pp. 147-154
Author(s):  
Ferymon Mahulette ◽  
Dea Indriani Astuti
Keyword(s):  
Ph Value ◽  
Sugar Content ◽  
Raw Material ◽  
Chemical Characteristics ◽  
Microbial Succession ◽  
Fermentation Product ◽  
Fermented Beverage ◽  
Pichia Polymorpha ◽  
Microbiological Research

Ambonese arrack is one of the traditional fermented beverage product in Maluku, Indonesia. The microbiological research of this beverage that is processed using coconut sap as raw material has never been done before. The research aimed to analyze the microbial succession and chemical characteristics during fermentation of Ambonese arrack. The sample of coconut sap was taken from traditional producer in Mahia village, Ambon. The dominant microbes in the fermentation of Ambonese arrack were Pichia polymorpha and Kloeckera javanica. The highest numbers of these two microbes was obtained after 15 hours fermentation (9.6 log Cfu/mL and 9.9 Cfu/mL, respectively). The sugar content decreased from 593.3 mg/L to 474.3 mg/L, whereas ethanol content increased from 0.0018 g/L to 0.0100 g/L. The pH value decreased from 4.70 to 3.10. The research has isolated indigenous microbes in Ambonese arrack fermentation which was considered as novelty. The bacteria that play a role in fermentation can be used as a starter in the fermentation of various beverage products, especially Ambonese arrack. The results of this research can improve the quality of this fermentation product in the future.

scholarly journals Seasonal Effects on Starch Contents Evaluated in Cassava Roots

2017 ◽  
Vol 9 (10) ◽  
pp. 244
Author(s):  
Genilso Gomes de Proença ◽  
Carla Adriana Pizarro Schmidt ◽  
José Airton Azevedo dos Santos
Keyword(s):  
Climatic Factors ◽  
Starch Content ◽  
Raw Material ◽  
Seasonal Effects ◽  
Winter Period ◽  
Genetic Characteristics ◽  
Wide Range ◽  
Product Delivery ◽  
Root Starch

Starches have a wide range of uses and their consumption has increased over the years, resulting in a growth in the agro-industries that produce them. Cassava is a very important plant for agri-business and one of the main products obtained from its roots is starch. Although cassava can be harvested throughout the year, its quality varies greatly through the seasons; this is because it is influenced by soil and climatic factors, as well as the genetic characteristics of the species. These influences result in seasonal oscillations in root classification based on the starch content available at the time of product delivery. Faced with this problem, the objective of this study was the collection and evaluation of documentary data for 3 years of product quality samples. This was done in order to observe the situation and propose tools that can minimize problems resulting from the quality of raw material received by starch producers throughout the year. It was observed that in the winter period there was an increase in root starch content, despite the differences between the months not being statistically significantly, they are financially representative of this agro-industry sector. At the end of the study, a proposal for a methodology for calculating payment per gram of starch is presented in order to minimize the problem.

Heavy metal contents and the water quality of Karasu Creek in Nigde, Turkey

2007 ◽  
Vol 137 (1-3) ◽  
pp. 169-178 ◽  
Author(s):  
M. Gurhan Yalcin ◽  
Olcay Aydin ◽  
Hatim Elhatip
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
Metal Contents

scholarly journals Chemical precipitation of heavy metals from wastewater by using the synthetical magnesium hydroxy carbonate

2020 ◽  
Vol 81 (6) ◽  
pp. 1130-1136 ◽  
Author(s):  
Yue Zhang ◽  
Xiumei Duan
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ph Value ◽  
Metallurgical Industry ◽  
Chemical Precipitation ◽  
Raw Material ◽  
Low Grade ◽  
Heavy Metal Wastewater ◽  
Removal Efficiencies ◽  
Hydroxy Carbonate

Abstract Heavy metal pollution has become one of the most serious environmental problems today. The preparation of magnesium hydroxy carbonate from low-grade magnesite, and the chemical precipitation of heavy metal wastewater with magnesium hydroxy carbonate as precipitating agent were undertaken. The removal efficiencies of heavy metals were improved by increasing the dose of magnesium hydroxy carbonate, and the applicable dose of magnesium hydroxy carbonate was 0.30 g for 50 mL of the wastewater (6,000 mg/L). The precipitation reactions proceeded thoroughly within 20 min. At this time, the removal efficiencies of heavy metals were above 99.9%. The final pH value was 7.1, the residual VO2+, Cr3+ and Fe3+ concentrations were 0.01, 0.05 and 1.12 mg/L, respectively, which conformed to the limit of discharge set by China (0.5–2.0 mg/L, GB 8978–1996). The precipitate was mainly composed of Fe2O3, V2O5 and Cr2O3, which can be recycled as secondary raw material for metallurgical industry. The treatment of the heavy metal wastewater with magnesium hydroxy carbonate was successful in decreasing the concentrations of VO2+, Cr3+ and Fe3+ in wastewater.

scholarly journals Physicochemical and microbiological quality in the fermentation of different cocoa blends with the addition of coffee and cardamom

2020 ◽  
Vol 9 (10) ◽  
pp. e4759108742
Author(s):  
Nélio Ranieli Ferreira de Paula ◽  
Érica de Oliveira Araújo ◽  
Natália Dias de Oliveira
Keyword(s):  
Fermentation Process ◽  
Ph Value ◽  
Microbiological Quality ◽  
Raw Material ◽  
Soluble Solids ◽  
Scientific Development ◽  
Experimental Conditions ◽  
Fermentation Time ◽  
Consequent Reduction

Fermentation is an essential step in obtaining good quality almonds. Thus, the present study aimed to evaluate the fermentation process of cocoa almonds and quantify the physicochemical and microbiological quality of different cocoa blends with the addition of coffee and cardamom, aiming at the reduction of the cost of processing, the addition of value to the raw material, and technological and scientific development of the Amazon region. The experimental design used was completely randomized, arranged in a 4 x 2 x 3 factorial scheme, corresponding to four fermentation times, two fermentation, three concentrations of pulp (blends) (pure cocoa, cocoa + coffee, and cocoa + cardamom), and three replicates. The results made it possible to conclude that the temperature inside the mass measured every 48 hours after turning increased with the fermentation time, reaching its maximum on the seventh day of fermentation. The increase in the temperature inside the fermentation mass on the seventh day is due to the higher concentration of acetic acid, evidenced by the reduction in pH value and consequent reduction in °Brix. Fermentation in a greenhouse at a temperature of 40 °C enables the maintenance of stable temperature throughout the fermentation process for blends of cocoa with the addition of coffee and cardamom. It is verified that, when there is a pre-established temperature, as in a greenhouse at 40 °C, there is a decrease in the values of °Brix and soluble solids present in the final product. Temperature, pH, and sugars are determining factors for the duration of the fermentation process and quality of pure cocoa almonds and cocoa almonds with the addition of coffee and cardamom. Under the experimental conditions, fermentation time from seven days is sufficient to ensure the physicochemical and microbiological quality of cocoa blends with the addition of coffee and cardamom, but it should not exceed nine days.

scholarly journals Quality and Potency Analysis of IVY Leaf Extract

2020 ◽  
Vol 8 (1) ◽  
pp. 58-62
Author(s):  
Sidra Yasmeen ◽  
Rafia Usman ◽  
Sultan Ayaz ◽  
Fatima Qamar ◽  
Syeda Zainab ◽  
...  
Keyword(s):  
Heavy Metal ◽  
High Performance ◽  
Leaf Extract ◽  
Sweet Taste ◽  
Base Line ◽  
Metal Analysis ◽  
Metal Contents ◽  
Physicochemical Factors ◽  
Microbial Analysis

The current study was conducted with the aim to evaluate Ivy leaf extract to authenticate the quality of extract. Evaluation was conducted on different physicochemical factors of extract that include physical appearance, organoleptic properties and solubility. Loss on drying, microbial analysis and heavy metal analysis was also carried out to execute the safety of extract. High performance liquid chromatography was executed to evaluate the presence of Hederacoside C in Ivy leaf extract employing phosphoric acid 85 %, acetonitrile, water (2:140:860 v/v/v) as a mobile phase. Extract exhibited greenish brown color, distinctive odor and sweet taste. An Ivy extract was found in agreement of the allowable microbial limit as well as with the heavy metal contents limit. The presence of Hederacoside C in Ivy leaf extract was confirmed by HPLC. The current evaluation reveals conformity with all the analytical procedures. Hence Ivy leaf extract is well standardized formulation at the base line consideration.

scholarly journals Garam Indonesia Berkualitas: Studi Kandungan Logam Berat Timbal (Pb) Pada Garam [The Quality of Indonesia Salt: Study of Heavy Metal Lead (Pb) Levels in the Salt]

2019 ◽  
Vol 11 (1) ◽  
pp. 43
Author(s):  
Nurus Samsiyah ◽  
Anita Dewi Moelyaningrum ◽  
Prehatin Trirahayu Ningrum
Keyword(s):  
Heavy Metal ◽  
Production Process ◽  
Descriptive Analysis ◽  
Raw Material ◽  
Soil Environment ◽  
Salt Production ◽  
Pb Contamination ◽  
Production Processes ◽  
Post Production

AbstrakKualitas garam sangat ditentukan oleh perlakuan dan penanganan yang diberikan pada saat pra produksi, proses produksi maupun pasca produksi. Kontaminan Pb dalam garam dapat bersumber dari lingkungan perairan laut sebagai bahan baku, tanah sebagai media / tempat produksi garam dan lingkungan udara dimana proses produksi garam berlangsung di lahan terbuka. Tujuan penelitian ini adalah untuk menganalisis kadar logam berat timbal (Pb) dalam garam di Kabupaten Pamekasan. Jenis penelitian ini adalah jenis deskriptif. Teknik pengumpulan data penelitian melalui observasi dan wawancara. Hasil observasi menunjukkan bahwa rata-rata kadar logam berat timbal (Pb) di Kabupaten Pamekasan masih di bawah batas maksimum yang telah ditentukan dalam SNI 3556-2010 dan SNI 7387-2009 yaitu <10 ppm dengan kadar Pb terendah 0,066 ppm dan tertinggi 0,162 ppm. Proses produksi garam kurang sesuai dengan standar yang telah ditetapkan. Oleh karena itu, perlunya penangangan yang baik pada pra produksi, proses produksi hingga pasca produksi pembuatan garam agar kadar Pb tidak meningkat.AbstractThe quality of salt is very determined by the treatment and handling given during the pre-production, production and post-production processes. Pb contamination in salt can be sourced from the marine environment as raw material in the process of making salt, the soil environment as a medium / place of salt production and the air environment where the salt production process takes place in an open area. The aim of research was to analyze levels of lead heavy metals (Pb) of salt in Pamekasan Regency. This research is a descriptive analysis. The techniques of data collecting of this research are observation and interview. Observations indicate that the average level of heavy metal lead (Pb) in Pamekasan regency is still below the maximum limit specified in SNI 3556-2010 and SNI 7387-2009 is <10 ppm which is the lowest grade of 0.066 ppm and grade the highest is 0.162 ppm. The salt production process is not in accordance with established standards The Therefore, the need for good handling in pre-production, production processes to post-production of salt production so that Pb levels do not increase.

scholarly journals Effect of varieties and growing environments on tuber yield, nutritional and process quality of potato grown in bale highlands, south eastern Ethiopia

2018 ◽  
Vol 7 (2) ◽  
pp. 18-21
Author(s):  
Shure Soboka ◽  
Getachew Asefa ◽  
Mohammed Beriso
Keyword(s):  
Specific Gravity ◽  
Dry Matter ◽  
Starch Content ◽  
Potato Production ◽  
Process Quality ◽  
Matter Content ◽  
Dry Matter Content ◽  
Eastern Ethiopia ◽  
Post Harvest

The highland of Bale is known with potato production, but post harvest quality of the crop is not emphasized yet. Therefore, this study was conducted to evaluate six potato varieties with the objective of assessing the effect of varieties and growing on tuber nutritional and process quality of potato grown in Sinana and Dinsho highlands of Bale. The experiment was laid out in randomized complete block design with three replications. The varieties showed highly significant (P<0.05) differences for all the parameters studied across the locations. The highest specific gravity, dry matter content and starch content (1.107, 26.61 and 19.19) were recorded from Dinsho location for Guddene variety while the lowest specific gravity, dry matter content and starch content (1.084, 19.41 and 14.61) were recorded from Sinana location for Ararsa variety. Most of the varieties were recorded as the highest values of specific gravity, dry matter and starch content at Dinsho indicating that it is an ideal location for potato production to be used for processing while Sinana is suitable for the production for home consumption. However, it is necessary to evaluate these varieties for a number of seasons and locations to recommend with high post harvest quality parameters required by the processors.Int. J. Agril. Res. Innov. & Tech. 7 (2): 18-21, December, 2017

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