scholarly journals Pesticide residues in cow’s milk

Mljekarstvo ◽  
2021 ◽  
Vol 71 (3) ◽  
pp. 165-174
Author(s):  
Milivoje Ćosić ◽  
Keyword(s):  
Pesticide Residues ◽  
Large Series ◽  
The Other ◽  
Milk Samples ◽  
Commission Regulation ◽  
Maximum Residue Levels ◽  
Residue Levels ◽  
Quality Of Milk

Quality of milk plays a key role in its wide consumption but also of its involvement in a large series of derived products, such as yogurt, cheese, butter, and ice cream. An effective LC-MS/MS method has been validated for the determination of 81 different pesticide residues in milk samples. The analyses comprised 44 milk samples collected during 2019. From all inspected pesticides, only metalaxyl (present in 11.36 % samples), bifenthrin and metolachlor (9.09 %), dimethoate (4.55 %), prochloraz and thiacloprid were detected in 2.27 % of analysed samples. The detections of trifloxystrobin and bifenthrin were above the maximum residue levels (MRLs). The Commission Regulation (EU) 2017/1135 standardizes the MRLs for dimethoate and omethoate in certain products, but a MRL for dimethoate residues in milk has not been established jet. All the other pesticide detections were below the MRLs.

scholarly journals Determination Of Quality Of Milk From Different Genotype Of Dairy Cows

1970 ◽  
Vol 37 (1) ◽  
pp. 52-56 ◽  
Author(s):  
MR Islam ◽  
MN Hassan ◽  
MSR Siddiki ◽  
MAS Khan ◽  
MA Islam
Keyword(s):  
Specific Gravity ◽  
Dairy Cows ◽  
Protein Content ◽  
Milk Sample ◽  
The Other ◽  
Test Protein ◽  
Quality Of Milk ◽  
Genotype A

The present study was conducted to investigate the milk quality from different genotype. A total 48 dairy cows belong to different genotypes such as Holstein cross, Jersey cross, Sahiwal cross and Red Chittagong were selected. Milk compositional viz. specific gravity, Acidity test, Fat test, Protein test, Solids-not-fat (SNF) test and total solids (TS) test were carried out. It was observed that the higher specific gravity of milk was obtained from Jersey cross and Red Chittagong genotype, which was significantly higher (P<0.01) than the other genotype of dairy cows. The highest acidity (%) was observed (0.165±0.014) in Red Chittagong and the lowest acidity (0.118±0.025) in Sahiwal cross. The highest fat (%) was observed from Red Chittagong cows milk which was statistically higher from Jersey cross and Sahiwal cross and the lowest fat (%) was found in the milk of Holstein cross cows. The highest SNF value was obtained from Jersey cross and the lowest from Sahiwal cross. On the other hand, Holstein cross and Red Chittagong was nearly similar. Red Chittagong milk sample showed the highest TS value and the lowest value was observed from Holstein cross. The highest protein value was found from Red Chittagong and the lowest from Holstein cross but the protein content of other two genotypes were nearly similar. DOI: http://dx.doi.org/10.3329/bjas.v37i1.9868 BJAS 2008; 37(1): 53-56

QUALITY ASSESSMENT OF RAW MILK IN KOSOVO

2018 ◽  
Vol 28 (4) ◽  
pp. 1305-1309
Author(s):  
Emine Uka ◽  
Nexhdet Shala ◽  
Arsim Elshani
Keyword(s):  
Negative Impact ◽  
Raw Milk ◽  
The Other ◽  
Human Consumption ◽  
Monitoring Point ◽  
Milk Processing ◽  
Milk Samples ◽  
Fresh Milk ◽  
Quality Of Milk

Since milk is one of the most consumable products of human consumption and in Kosovo, it is one of the most prosperous agriculture branches and the continued support to farmers from the Ministry of Agriculture, European Commission and USID, through which we will offer knowledge about the quality of this milk. Quality milk production is the ultimate goal and goal of any milk producer and processor. On the other hand, the low quality of milk has a negative impact on all segments of the dairy industry, especially in the fresh milk processing segment.Our work provides testing of raw milk samples taken by farmers who send milk to milk collection points and dairies in order to determine the quality of your milk. As a monitoring point we have received the Vita dairy and Aldi dairy in the period January 2017 - October 2018, and we have presented a comparison of their results.

scholarly journals An quantificational method for 51 pesticide residues determination in Pu'er tea by LC-MS/MS

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Xudong Wu ◽  
Zeyu Chen ◽  
Jiankang Zhang ◽  
Hongping Man ◽  
Tao Che ◽  
...  
Keyword(s):  
Pesticide Residues ◽  
Black Tea ◽  
The European Union ◽  
Acceptable Range ◽  
Maximum Residue Levels ◽  
Residues Determination ◽  
Residue Levels ◽  
Linear Concentration Range ◽  
Linear Concentration

<p>Pesticide residues in tea is a major issue due to their widely used in tea cultivation. Thus, to protect consumers, an appropriate method for determination of their residues in tea should be done. In this study, a method for the simultaneous determination of 51 pesticides in tea was developed and validated. The tea sample was extracted by acetonitrile and purified SPE clearnet TPT column followed by liquid chromatography coupled to tandem mass spectrometry (LC–MS/MS) with multi-reaction monitoring (MRM) mode. The method was validated according to the linearity, limit of detention, precision, the percentage of recovery at three different spike levels. The linear concentration range used was 10-100ng/ mL, the square of Correlation coefficient r2 was more than &gt;0.995. Recoveries were adequate being in the acceptable range of 72-89% and RSD of &lt;19 % for all the analytes at three level of 0.01,0.05 and 0.11mg/kg, the LOD of all chemicals from 0.001 mg/kg to 0.01 mg/kg .The method was applied for the determination for 400 tea samples collected from Pu'er which contain green tea and black tea. Among the analyzed samples , 36 % samples had Imidacloprid and 25% sample contain Acetamiprid, which were at a level below the European Union maximum residue levels (EU-MRLs). The information would be beneficial for Pu'er tea exporters.</p>

scholarly journals Microbiological and Sensory Quality of Milk on the Domestic Market

2015 ◽  
Vol 65 (4) ◽  
pp. 261-268 ◽  
Author(s):  
Anna Piotrowska ◽  
Franciszek Świderski ◽  
Eliza Kostyra ◽  
Małgorzata Żebrowska-Krasuska ◽  
Anna Sadowska
Keyword(s):  
High Temperature ◽  
Sensory Quality ◽  
Sensory Profile ◽  
Milk Samples ◽  
Preservation Method ◽  
Number Of Microorganisms ◽  
Quality Of Milk ◽  
Secondary Contamination

AbstractThe evaluation of the microbiological and sensory quality of 30 assortments of market milk was the objective of the presented research. The study also compared the sensory profile of selected samples of milk differing in preservation method. Microbiological tests included determination of the presence and number of Enterobacteriaceae and the total number of microorganisms. Sensory characteristics of all the milk samples was performed by scaling method (5-points scale). Selected samples of milk were additionally assessed by means of profile method. Microbiological tests showed satisfactory microbiological purity of milk, which indicates the effectiveness of the heat treatment and the lack of secondary contamination. Regardless of the preservation method, all the evaluated milk samples were characterised by a high sensory quality (4.25-5 points). There were no changes in smell and taste, resulting from the development of undesirable microflora. The tested samples of milk differing in the preservation method (sterilisation, pasteurisation at high temperature and subjected to microfiltration and low pasteurisation) varied in the sensory profile. Milk pasteurised at high temperature was characterised by the most harmonised overall quality.

Kvalitet pitanja u TV školi u nastavi prirode i društva

2021 ◽  
Author(s):  
Jelena Lukić ◽  
Keyword(s):  
Social Science ◽  
The Other ◽  
Educational Content ◽  
Educational Levels ◽  
School Year ◽  
Other Hand ◽  
Cognitive Levels ◽  
The Way

The aim of this paperis to determine the quality of TV classes World around us and Nature and Social Science,which were broadcasted on Radio Television of Serbia during the pandemic in the school year 2019/20. Although the work was indirect, so the immediate interaction between the teacher and student is missed. Therefore, teacher's questions were the way of establishing some kind of interaction in such classes organized in this manner. For this reason, we wanted to establish the types of questions that teachers were asking to students through small screens. Considering that the achievements of learning are based on Bloom's Taxonomy, we were analyzing sixteen TV classes and classified the questions the teachers asked according to cognitive area, on six educational levels. The results indicate that the most common were question within lower cognitive levels were (knowledge, understanding and application), and that there are no statistically significant differences in cognitive levels on questions asked between lower (1st and 2nd grade) and higher grades (3rd and 4th grade), on the other hand, on the classes of determination of educational content teachers were asking statistically significant quality questions compared to the classes of interpretation.

scholarly journals Bioactive Labels for Fresh Fruits and Vegetables

2013 ◽  
Vol 70 (2) ◽  
pp. 75 ◽  
Author(s):  
Liana Nasui ◽  
Dan Vodnar ◽  
Carmen Socaciu
Keyword(s):  
Green Tea ◽  
Bioactive Compounds ◽  
Pesticide Residues ◽  
Fruits And Vegetables ◽  
Glacial Acetic Acid ◽  
The Other ◽  
Microbial Load ◽  
Influence Of Water ◽  
Tea Extract

Pesticide residues and microbial load on the surface of fresh fruits and vegetables becomes a major concern due to the safety and quality of these products for consumer.In order to minimize these risk factors (pesticide residues and microbial load), were achieved labels for fruits and vegetables that are consumed with shell which disintegrates under the influence of water jet and thus reduce the amount of these contaminants. Were elaborated labels based on polymer (chitosan) at a concentration of 2%, which incorporate bioactive compounds from green tea with potential decontaminant of the peel of this products. Green tea extract was obtained by infusing 1 g of dried green tea in 100 ml water at 80° C for 10 minutes. The extract was filtered and then mixed with 2 g chitosan acidified with 0.7% glacial acetic acid and dilute to the mark with distilled water. Were identified bioactive compounds from green tea, using UV-VIS and HPLC. Then were elaborated the labels. These tags were used on pepper, tomato, apple and  nectarine. Were quantified the microbial load and the pesticide residues on their surface unwashed, washed only with water and were monitored the influence of labels on these factors. Identified pesticides were mefenoxan and thiamethoxam, which were quantified by HPLC. In what it concerns the influence, were founded the absence of germs at pepper and a significant decrease at the other. In terms of  the potential of reducing pesticide, the experimental results have indicated that the label can prove its effectiveness.

scholarly journals Physical and microbial qualities of raw milk collected from Bangladesh Agricultural University dairy farm and the surrounding villages

1970 ◽  
Vol 6 (2) ◽  
pp. 217-221 ◽  
Author(s):  
MTG Khan ◽  
MA Zinnah ◽  
MP Siddique ◽  
MHA Rashid ◽  
MA Islam ◽  
...  
Keyword(s):  
Microbiological Quality ◽  
Dairy Farm ◽  
Raw Milk ◽  
Viable Count ◽  
Physical Parameters ◽  
Total Viable Count ◽  
Coliform Count ◽  
Milk Samples

The present study was undertaken with the aim of investigating the physical parameters (e.g. organoleptic and specific gravity of raw milk) and also to study the microbiological quality of raw milk (total viable count, Coliform count and Staphylococcal count) from different villages and Bangladesh Agricultural University (BAU) Dairy Farm of Mymensingh District of Bangladesh, during the period from July to November 2007. A total number of 100 raw milk samples were collected at morning and evening from BAU dairy farm and surrounding four villages of BAU campus. The organoleptic and bacteriological qualities of each sample were analyzed. The organoleptic examination included taste panel score to assess consumer's acceptance and the bacteriological analysis comprised enumeration of total viable count (TVC), total colifrom count (TCC) and total staphylococcal count (TSC) for the determination of sanitary quality. The organoleptic quality of the milk samples is more or less same except the Churkhai milk samples which had flat taste (in 16% milk sample). The average values of TVC/ml were log 5.920, 5.934, 6.007, 6.075 and 6.127 for BAU Dairy Farm, Boira, Shutiakhali, Churkahai and Paglabazar respectively; coliform count were log 2.501, 2.522, 2.550, 2.620 and 2.619 respectively; staphylococcal count were log 2.832, 2.812, 2.866, 2.931 and 2.988 respectively. So, it may be concluded that the raw milk samples of BAU Dairy Farm were superior to others collected from the selected villages which may be due to maintaining better hygienic condition. Key words: Raw milk, physical and microbial quality   doi: 10.3329/bjvm.v6i2.2339 Bangl. J. Vet. Med. (2008). 6 (2): 217-221

Pesticide Residues in Food: Attitudes, Beliefs, and Misconceptions among Conventional and Organic Consumers

2017 ◽  
Vol 80 (12) ◽  
pp. 2083-2089 ◽  
Author(s):  
Severine Koch ◽  
Astrid Epp ◽  
Mark Lohmann ◽  
Gaby-Fleur Böl
Keyword(s):  
Pesticide Residues ◽  
Media Coverage ◽  
Risk Perceptions ◽  
Computer Assisted ◽  
Pesticide Use ◽  
Bodily Fluids ◽  
Legal Limits ◽  
Maximum Residue Levels ◽  
Food Quality And Safety ◽  
Residue Levels

ABSTRACT Pesticide use and pesticide residues in foods have been the subject of controversial public discussions and media coverage in Germany. Against this background, a better understanding of public risk perceptions is needed to promote efficient public health communication. To this end, this study captures the German public's perception of pesticide residues in foods. A representative sample of the population aged 14 years and older (n = 1,004) was surveyed via computer-assisted telephone interviewing on their attitudes and knowledge with regard to pesticide residues. Based on questions regarding their typical consumer behavior, respondents were classified into conventional and organic consumers to identify differences as well as similarities between these two consumer types. As assessed with an open-ended question, both organic and conventional consumers viewed pesticides, chemicals, and toxins as the greatest threats to food quality and safety. Evaluating the risks and benefits of pesticide use, more than two-thirds of organic consumers (70%) rated the risks as greater than the benefits, compared with just over one-half of conventional consumers (53%). Concern about the detection of pesticide residues in the food chain and bodily fluids was significantly higher among organic compared with conventional consumers. Only a minority of respondents was aware that legal limits for pesticide residues (referred to as maximum residue levels) exist, with 69% of organic and 61% of conventional consumers believing that the presence of pesticide residues in foods is generally not permitted. A lack of awareness of maximum residue levels was associated with heightened levels of concern about pesticide residues. Finally, general exposure to media reporting on pesticide residues was associated with more frequent knowledge of legal limits for pesticide residues, whereas actively seeking information on pesticide residues was not. The possible mechanisms underlying these findings are discussed.

scholarly journals Effect of the stage of lactation on milk composition, its properties and the quality of rennet curdling in East Friesian ewes

2008 ◽  
Vol 53 (No. 2) ◽  
pp. 55-63 ◽  
Author(s):  
J. Kuchtík ◽  
K. Šustová ◽  
T. Urban ◽  
D. Zapletal
Keyword(s):  
Titratable Acidity ◽  
Milk Composition ◽  
The Other ◽  
Phenotypic Correlation ◽  
Clotting Time ◽  
Milk Samples ◽  
Phenotypic Correlations ◽  
Stage Of Lactation ◽  
Sheep Farm

The evaluation of the effect of the stage of lactation on milk composition, its properties and the quality of rennet curdling was carried out over the period of three successive years using milk samples (<I>n</I> = 162) obtained from a total of 27 ewes of the East Friesian (EF) breed, reared on a small sheep farm in Juřinka in the region of Wallachia. The stage of lactation had a highly significant effect on the contents of all milk components. However, only the contents of total solids (TS), solids non-fat (SNF), fat (F), protein (P) and casein (CN) gradually increased with the advancement of lactation. The stage of lactation also had a highly significant effect both on all the properties of milk and the rennet curdling quality (RCQ). All phenotypic correlations between the particular contents of TS, SNF, F, P, CN and urea nitrogen (UN) were positive and high (<I>P</I> ≤ 0.001). On the other hand, all phenotypic correlations between milk yield and particular contents of TS, SNF, F, P, CN and UN were negative and high (<I>P</I> ≤ 0.001). The majority of phenotypic correlations between rennet clotting time (RCT) and the other particular parameters was insignificant. However, the phenotypic correlations between lactose (L) and RCT and between pH and RCT were positive and high (<I>P</I> ≤ 0.001) whereas the phenotypic correlation between titratable acidity (TA) and RCT was negative and high (<I>P</I> ≤ 0.001). The majority of phenotypic correlations between the rennet curdling quality (RCQ) and the other particular parameters was insignificant. Nevertheless, the phenotypic correlations between pH and RCQ and between RCT and RCQ were positive and high (<I>P</I> ≤ 0.001) whereas the phenotypic correlation between TA and RCQ was negative and high (<I>P</I> ≤ 0.001).

THE NATIONAL RESEARCH COUNCIL'S REPORT ON A STUDY OF MILK REGULATIONS AND SANITARY MILK CONTROL*

1954 ◽  
Vol 17 (5) ◽  
pp. 139-143
Author(s):  
Harold S. Adams
Keyword(s):  
Milk Production ◽  
Research Council ◽  
National Research Council ◽  
Field Work ◽  
American City ◽  
Milk Samples ◽  
Production Distribution ◽  
Quality Of Milk ◽  
Control Work

This article reports upon research performed under the direction of the Committee on Milk Production Distribution and Quality of the National Research Council. The purpose of this research was to study the effect of milk regulations and their enforcement on the sanitary quality of milk. Eight large American city milk supplies were studied in detail. The field work included an inspection of a representative group of farms and milk plants and the examination of milk samples representative of each supply. Certain regulations governing the production and handling of milk were found to be definitely reflected in the bacteriological quality of both the raw and finished product. Several significant conclusions are drawn which should be of particular value to those engaged in milk control work.

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