scholarly journals Hidden risk of the presence of weed species: Tropane alkaliods in food and cereals

Biljni lekar ◽  
2021 ◽  
Vol 49 (5) ◽  
pp. 655-665
Author(s):  
Gorica Vuković ◽  
Tijana Stojanović ◽  
Bojan Konstantinović ◽  
Aleksandra Petrović ◽  
Bojana Špirović-Trifunović ◽  
...  
Keyword(s):  
Tropane Alkaloids ◽  
Food Products ◽  
Weed Species ◽  
Limit Of Quantification ◽  
Negative Effect ◽  
Novi Sad

This paper evaluates the occurrence of the TAs in 71 food products samples. The analysis comprised the following samples: 18 corn puffs, 12 popcorn, 16 corn and 25 corn grits samples, obtained from the shops in Belgrade and Novi Sad during 2019. and 2020. The overall number of the samples with the atropine and scopolamine detections below the LOQ was 61,97%. The percentage of the detection of the tropane alkaloids above the limit of quantification, which may have a negative effect on the health of humans and animals, was 29,57%. The atropine and scopolamine detections are equal in the number of corn puffs, popcorn and corn samples, while 7 samples of corn grits contained the atropine, and 6 of them contained the scopolamine. The highest mean concentrations of the atropine and scopolamine were detected in corn grits, followed by popcorn, then in the corn, while the lowest were in the corn puffs.

scholarly journals Development of a Sandwich Enzyme-Linked Immunosorbent Assay for Detection and Quantification of Clam Residues in Food Products

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Stef J. Koppelman ◽  
Ashley L. Lardizabal ◽  
Lynn Niemann ◽  
Joe L. Baumert ◽  
Steve L. Taylor
Keyword(s):  
Sandwich Elisa ◽  
Food Product ◽  
Food Products ◽  
Elisa Test ◽  
Cross Reactivity ◽  
Enzyme Linked Immunosorbent Assay ◽  
Allergic Reactions ◽  
Arctica Islandica ◽  
Limit Of Quantification ◽  
Detection And Quantification

Seafood is a frequent cause of allergic reactions to food globally. The presence of undeclared trace amounts of clam can cause allergic reactions in sensitive individuals. Limited tools are available to test food products for the presence of traces of clam. We report on the development of a sandwich ELISA that can detect and quantify clam protein in food. Antisera against a mix of two commercially important clam species, Atlantic Surf (Spisula solidissima) and ocean quahog (Arctica islandica), were raised in rabbit and sheep. A sandwich ELISA was constructed with this antisera, and sensitivity and specificity were evaluated. Also, model food products spiked with clam protein were analyzed to assess the performance of the ELISA. Comparison was made with a commercially available ELISA for crustacea. The lower limit of quantification of the sandwich ELISA is 2.5 ppm clam protein in food samples, allowing the detection of low amounts of clam that may trigger a reaction in clam allergic patients. The sandwich ELISA was highly specific with cross-reactivity only noted for other molluscan shellfish (mussel and scallop). Clam protein in tomato juice and potato cream soup was detected well with recoveries ranging from 65 to 74% and from 74 to 113%, respectively. However when potato cream soup was retorted, the recover fell to 20%, imposing the risk of underestimating the clam content of a food product. A commercially available crustacean ELISA test was not suitable to detect clam protein. The sandwich ELISA described here is suitable for detection and quantification of clam protein in food products. Care should be taken with food products that have been retorted as the results may be underestimated.

scholarly journals Development of a DNA-based Assay to Detect and Quantify Tropane Alkaloids Producing Thornapple Contaminations in Processed Food

2019 ◽  
Vol 73 (5) ◽  
pp. 422-425 ◽  
Author(s):  
Anna Weston ◽  
Peter Brodmann ◽  
Maximilian Widmer ◽  
Julian Bartel ◽  
Eric Kübler
Keyword(s):  
Genetically Modified Organisms ◽  
Tropane Alkaloids ◽  
Food Product ◽  
Food Products ◽  
Datura Stramonium ◽  
Processed Food ◽  
Panicum Miliaceum ◽  
Main Ingredient ◽  
Nutrient Source ◽  
Specificity And Sensitivity

Contaminates such as pesticides, toxic molecules of natural origin, genetically modified organisms and others can occur in processed food, especially if the main ingredient grows in open fields exposed to the environment. In particular, some health threatening toxic compounds are natural ingredients of plants that grow wild next to vegetables intended for consumption and can therefore enter the crop yield and stay there undetected. The tropane alkaloids-containing nightshade thornapple Datura stramonium, often grows in close vicinity to millet (Panicum miliaceum) a widely cultivated cereal, representing an important nutrient source in different countries of Asia and Africa. Discriminating thornapple from millet during harvest is not easy and consequently, millet-containing food products are often contaminated with tropane alkaloids from thornapple. In this work, two DNA specific hydrolysis probe qPCR methods were developed for Datura stramonium and Panicum miliaceum in order to detect thornapple contamination in millet-containing food products. The specificity and sensitivity of the developed assay system allows for its application in screenings during food product testing.

Agronomic performance of Pesticide Free Production under two crop rotations

2005 ◽  
Vol 20 (2) ◽  
pp. 91-100 ◽  
Author(s):  
A. Schoofs ◽  
M.H. Entz ◽  
R.C. Van Acker ◽  
J.R. Thiessen Martens ◽  
D.A. Derksen
Keyword(s):  
Crop Rotation ◽  
Cropping System ◽  
Crop Rotations ◽  
First Year ◽  
Weed Species ◽  
Weed Density ◽  
Crop Selection ◽  
Long Term Study ◽  
Alfalfa Hay ◽  
Negative Effect

AbstractPesticide Free Production (PFP) is a pesticide reduction system that removes in-crop pesticide use on a yearly basis. A long-term study was established in 2000 to investigate the effect of crop rotation and frequency of inclusion on the success of PFP, as well as the effect of PFP on subsequent crops in the rotation. The crop rotations being compared were linola–oat–canola–wheat and linola–oat–alfalfa–alfalfa. PFP occurred either once in the rotation (oat) or twice (linola–oat). Weed density and yield were measured in the crops that followed PFP. Oat was a more successful PFP crop than linola because it was better able to compete with weeds. Furthermore, PFP oat had a higher weed density when it followed PFP linola, but this did not influence PFP oat yield. Under the conditions of this study, PFP linola was more successful in the annual crop rotation. Inclusion of alfalfa hay crops in the crop rotation was not effective in lowering weed pressure and, in fact, may have contributed to an increase in weed density. It is concluded that weed species present influenced the effectiveness of alfalfa in facilitating PFP, because major weeds in the study are not effectively controlled by alfalfa. PFP did not have a negative effect on following crops in the rotation (i.e. canola–wheat or alfalfa), regardless of whether one or two consecutive years of PFP occurred in the rotation. No additional herbicide was necessary for weed control in the crops that followed PFP; however, alfalfa hay was weedier for the first year following PFP. This study indicates that PFP is a viable way to reduce herbicide use in a cropping system and that attention needs to be paid to PFP crop selection and crop rotation, particularly when the PFP crop is less competitive with weeds.

scholarly journals Irrigated and Non-Irrigated Peanut (Arachis hypogaea L.) Cultivar Response to Postemergence Paraquat Tank-Mixtures

2019 ◽  
Vol 46 (1) ◽  
pp. 50-55
Author(s):  
K.M. Eason ◽  
R.S. Tubbs ◽  
T.L. Grey ◽  
X.S. Li
Keyword(s):  
Foliar Injury ◽  
Weed Species ◽  
Arachis Hypogaea L ◽  
Herbicide Treatments ◽  
Negative Effect ◽  
Peanut Cultivars ◽  
Southeast Us ◽  
Effect On Yield ◽  
The Given ◽  
Grass Weed

ABSTRACT Paraquat postemergence (POST) applied is often used to control broadleaf and grass weed species in peanut in the Southeast US. The objective of this study was to determine the effects of POST herbicide tank-mixtures including paraquat on vegetation, yield, and grade for runner-type peanut cultivars under irrigated and non-irrigated conditions. Two separate experiments (irrigated and non-irrigated) were conducted in 2016 and 2017 in Ty Ty and Plains Georgia. Georgia-06G, Georgia-14N, TUFRunner™ ‘511’, and FloRun™ ‘157’ cultivars were evaluated. Herbicide tank-mixtures included paraquat, paraquat plus acifluorfen plus bentazon, paraquat plus acifluorfen plus bentazon plus S-metolachlor, and paraquat plus acifluorfen plus bentazon plus acetochlor. Leaf burn, stunting injury, yield, and grade were evaluated. There were no interactions between herbicide and cultivar for all variables. Paraquat alone resulted in significantly greater foliar injury (3 DAT) than the other herbicide treatments for the irrigated (34 to 16%) and non-irrigated (28 to 15%) studies. Stunting for paraquat alone was noted at 15 and 35% for irrigated and non-irrigated, respectively. Similarly, in both studies, Georgia-06G and TUFRunner™ ‘511’ yielded 10 to 12% greater than Georgia-14N and FloRun™ ‘157’. Overall, the herbicide tank-mixtures did not have a negative effect on yield. With no interactions observed, these herbicide treatments can be used in conjunction with the given runner-type peanut cultivars in either irrigated or non-irrigated conditions without concern for excessive injury or decline in yield or grade.

scholarly journals Special aspects of the development of black currant bushes depending on weediness level in the Ukrainian polissia

2020 ◽  
Vol 10 (4) ◽  
pp. 18-22
Author(s):  
A.V. Bakalova ◽  
N.V. Hrytsiuk ◽  
N.M. Tkalenko
Keyword(s):  
Species Composition ◽  
Amaranthus Retroflexus ◽  
Matter Content ◽  
Dry Matter Content ◽  
Plant Tolerance ◽  
Weed Species ◽  
Couch Grass ◽  
Black Currant ◽  
Pests And Diseases ◽  
Negative Effect

We studied the weeds species composition in the black currantplantations of Ukrainian Polissia. The species composition of weeds has been analyzedand is was typical for thisarea. Twelve weed species were found during the study; they included annual (89.8%) and perennial ones (10.2%). A number of species were prevalent among the perennial weeds, namely common dandelion (Taraxacum officinaleWigg.) –2.5 pcs/m2, field milk thistle (Sonchus arvensisL.) –2.8 pcs/m2, couch grass (Elytrigia repensL.) –8.8 pcs/m2, and field sorrel (Rumex acetostellaL.) –3.2 pcs/m2. The most common annual species of weeds were lamb’s quarters (Chenopodium albumL.) –44.2 pcs/m2, shepherd’s purse (Capsella bursa-pastorisL.) –36.3 pcs/m2, smooth meadow grass (Poa annuaL.) –25.1 pcs/m2, and Amaranthus retroflexus(Amaranthus retroflexusL.) –19.6 pcs/m2. Throughout the study period, the least common weeds in black currant plantations were chickweed (Stellaria mediaL.) –14.8 pcs/m2, annual nettle (Urtica urensL.) –1.6 pcs/m2, quickweed (Galinsoga parvifloraCav.) –9.1 pcs/m2, and field pansy (Viola arvensisMurr.)–2.6 pcs/m2. We registered that with theweediness of 8-9 points the area of black currant leaves from a bush decreases by 1.9 m2, while the chlorophyll content in the leaves reduced by 20.8mg/100g. On the contrary, the dry matter content inleaves increasedfrom 29 to 61%. Significant negative effect of weeds on the activity of black currant and leads to a decrease in plant tolerance againstthe sucking pests and diseases. Thus, under high and very high weediness (8-9 points),the development of anthracnose (Gioesporium ribisMont.) was 32–48%, powdery mildew (Sphaerotheca mors Uvae.) and septoria blight (Mycosphaerella ribisLind.) were 16 and 15% respectively. We proved that a high weediness level reduces the yield of berriesby 56%in black currant plantations.

Influence of carrier water pH, foliar fertilizer, and ammonium sulfate on 2,4-D and 2,4-D plus glyphosate efficacy

2019 ◽  
Vol 33 (04) ◽  
pp. 562-568 ◽  
Author(s):  
Pratap Devkota ◽  
William G. Johnson
Keyword(s):  
Field Study ◽  
Ammonium Sulfate ◽  
Weed Control ◽  
Palmer Amaranth ◽  
Weed Species ◽  
Foliar Fertilizer ◽  
Greenhouse Study ◽  
Giant Ragweed ◽  
Negative Effect ◽  
Water Ph

AbstractCarrier water pH is an important factor for enhancing herbicide efficacy. Coapplying agrochemical products with the herbicide might save time and resources; however, the negative effect of foliar fertilizers on herbicide efficacy should be thoroughly evaluated. In greenhouse studies, the effect of carrier water pH (4, 6.5, and 9), foliar fertilizer (zinc [Zn], manganese [Mn], or without fertilizer), and ammonium sulfate (AMS) at 0% or 2.5% vol/vol was evaluated on 2,4-D and premixed 2,4-D plus glyphosate efficacy for giant ragweed, horseweed, and Palmer amaranth control. In addition, a field study was conducted to evaluate the effect of carrier water pH (4, 6.5, and 9); and Zn or Mn foliar fertilizer on premixed 2,4-D plus glyphosate efficacy for horseweed and Palmer amaranth control. In the greenhouse study, 2,4-D and premixed 2,4-D plus glyphosate provided 5% greater weed control at acidic compared with alkaline carrier water pH. Coapplied Mn foliar fertilizer reduced 2,4-D and premixed 2,4-D plus glyphosate efficacy at least 5% for weed control. Addition of AMS enhanced 2,4-D and premixed 2,4-D plus glyphosate efficacy at least 6% for giant ragweed, horseweed, and Palmer amaranth control. In the field study, few significant differences occurred between coapplied Zn or Mn foliar fertilizer for any treatment variables. Therefore, carrier water pH, coapplied foliar fertilizer, and water-conditioning adjuvants have potential to influence herbicide performance. However, weed species could play a role in the differential response of these factors on herbicide efficacy.

scholarly journals Seasonal variations of bisphenol A in the Danube River by the municipality of Novi Sad, Serbia

2016 ◽  
Vol 81 (3) ◽  
pp. 333-345 ◽  
Author(s):  
Maja Milanovic ◽  
Jan Sudji ◽  
Nevena Grujic-Letic ◽  
Jelena Radonic ◽  
Maja Turk-Sekulic ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Seasonal Variations ◽  
Solid Phase ◽  
Weather Conditions ◽  
Danube River ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Limit Of Quantification ◽  
The Mean ◽  
Novi Sad

Seasonal variations of bisphenol A (BPA) were investigated in the Danube along the Novi Sad bank, Serbia using solid-phase extraction followed by gas chromatographic mass spectrometric method. The obtained results confirmed the presence of BPA above the limit of quantification (6 ng/L) in 22 out of 32 water samples at all eight sampling sites. ?he BPA concentration varied from <6 ng/L to 693 ng/L. The mean BPA concentration for summer (220 ng/L) significantly differed from those obtained for autumn (39 ng/L), winter (6 ng/L) and spring (41 ng/L). The risk quotients, expressed as the ratio of the 95th percentile of the measured environmental concentrations for each season and the predicted no-effect concentration were higher than one (> 1) for autumn, spring and summer. The high potential risk which is attributed to the elevated summer concentrations is probably the result of the increased human activates and weather conditions.

scholarly journals Zeleni cinizam – dimenzije i učinci na kupnju ekoloških prehrambenih proizvoda

2019 ◽  
Vol 9 (1) ◽  
pp. 45-57 ◽  
Author(s):  
Marija Ham
Keyword(s):  
Negative Impact ◽  
Organic Food ◽  
Food Products ◽  
Marketing Strategies ◽  
The Past ◽  
Significant Difference ◽  
Significant Negative Impact ◽  
Negative Effect ◽  
Sustainable Marketing ◽  
The Impact

Numerous criticisms as well as the conspicuous number of unfair manufacturing practices in the past have led to a significant scepticism and distrust by consumers. This deeply rooted distrust, scepticism, and disinterest in some consumers, can be encompassed by the notion of green cynicism. Green cynicism significantly interferes with and disturbs all activities and efforts from the domain of sustainable marketing, given that due to the extreme distrust, it is much harder or even impossible to place the product or maintain sustainable a business entity. This leads to an aggravated acceptance of Oeconomica Jadertina 1/2019. 45 these products by consumers and slower adoption of sustainable marketing strategies by economic operators, which is undoubtedly a socially undesirable phenomenon. For this reason, it is of great importance to study and understand the factors that influence this form of cynicism and how it affects certain behaviours. This paper aims to propose and explain the concept of green cynicism and explore some of its possible dimensions and verify their impact on the intention to buy organic food products. The survey was conducted on a sample of 411 respondents from eastern Croatia representing persons who purchase most household goods. The results based on the regression analysis have shown that the strongest negative effect on intentional purchases of ecological food products is attributed to the disinterest expressed as a lack of time to contemplate these issues at all. The distrust towards the organic food products or labels that distinguish them from conventional products achieves also a significant negative impact. In this research, the impact of scepticism on the issue of the environment did not prove to be significant, which could be a consequence of the fact that it concerns a significant difference in the width of the variable range.

scholarly journals Research of the compliance of the actual consumption of food products by the school pupils with the recommended consumption rates

2021 ◽  
Vol 17 (4) ◽  
pp. 24-32
Author(s):  
E. P. Victorova ◽  
E. V. Lisovaya ◽  
A. V. Sverdlichenko ◽  
D. A. Vorotyntsev ◽  
D. R. Bardizh
Keyword(s):  
Fast Food ◽  
Age Groups ◽  
Food Preferences ◽  
Food Products ◽  
Bakery Products ◽  
School Canteen ◽  
Confectionery Products ◽  
Consumption Rates ◽  
Negative Effect ◽  
Reproduction Method

The aim of the research is to study the correspondence of the actual consumption of food products by schoolchildren of different age groups in Krasnodar to the recommended consumption standards and to identify their taste preferences in order to justify the choice of basic products for creating products enriched with complexes of deficient micronutrients. The study of the actual consumption of food products by schoolchildren was carried out by a questionnaire using the 24-hour food reproduction method, and additional questions were included in the questionnaires to establish the preferences of schoolchildren when choosing food in the school canteen. It was found that the diet of schoolchildren, especially adolescents, is unbalanced. It was revealed that the consumption of sugar and confectionery products in the diet of schoolchildren significantly exceeded the recommended norm. Fast food constituted 42% in the daily diet of middle and senior schoolchildren. In addition, senior schoolchildren do not follow the diet: 18% of senior schoolchildren eat 4 times a day, 78% eat 3 times a day, and 4% eat only 2 times a day with significant breaks between meals. The study of food preferences of schoolchildren revealed that the greatest demand was for bakery products (67%) and drinks (54%), as well as confectionery (54%). Taking into account that the consumption of sugar and confectionery products in the diet of schoolchildren significantly exceeded the recommended norm and had a negative effect on the young organism, bakery products and drinks were chosen as basic products for creating food products enriched with deficient micronutrient complexes on their basis.

scholarly journals Dissipation rate of acetamiprid in sweet cherries

2014 ◽  
Vol 29 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Sanja Lazic ◽  
Dragana Sunjka ◽  
Srdjan Panic ◽  
Dusanka Indjic ◽  
Nada Grahovac ◽  
...  
Keyword(s):  
Sweet Cherry ◽  
Limit Of Detection ◽  
Detection System ◽  
Internal Diameter ◽  
Limit Of Quantification ◽  
Relative Standard ◽  
Fruit Samples ◽  
Sweet Cherries ◽  
Validation Procedure ◽  
Novi Sad

Degradation of acetamiprid in sweet cherry samples was evaluated at several intervals from the product application until the end of the pre-harvest interval. An orchard of sweet cherries located at Stepanovicevo village near Novi Sad was used in this study. Acetamiprid was applied according to the manufacturer?s recommendation for protecting sweet cherries from their most important pests. Sweet cherry fruit samples were collected at eight intervals: immediately after acetamiprid application and 2, 4, 6, 8, 10, 12 and 14 days after application. The extraction of acetamiprid from sweet cherry samples was performed using a QuEChERS-based method. Determination was carried out using an HPLC-UV diode array detection system (Agilent 1100, United States) with an Agilent Zorbax Eclipse C18 column (50 mm C 4.6 mm internal diameter, 1.8 ?m particle size). The method was subjected to a thorough validation procedure. The recovery data were obtained by spiking blank sweet cherry samples at three concentration levels (0.1-0.3 mg/ kg), yielding 85.4% average recovery. Precision values expressed as relative standard deviation (RSD) were below 1.61% for the intraday precision. Acetamiprid showed linear calibrations from 0.05 to 2.5 ?g/ml with correlation coefficient (R2) of 0.995%. The limit of detection and limit of quantification were found to be 5 ?g/kg and 14 ?g/kg, respectively. The validated method was applied in the analysis of acetamiprid in sweet cherry samples. During the study period, the concentration of acetamiprid decreased from 0.529 mg/kg to 0.111 mg/kg. The content of acetamiprid in sweet cherry samples at the end of the pre-harvest interval was below the maximum permissible level specified by the Serbian and EU MRLs.

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