Determination of Radionuclides and Elemental Concentrations in Black and White Tea Samples from Karadeniz in Turkey

2021 ◽  
Vol 11 (2) ◽  
pp. 426-438
Author(s):  
Miraç KAMIŞLIOĞLU ◽  
Canel EKE ◽  
Tuğba KAMAN ◽  
İsmail BOZTOSUN, PH.D.
Keyword(s):  
White Tea ◽  
Black And White ◽  
Elemental Concentrations

Liquid Chromatographic Method for Determination of Piperine in Piper nigrum (Black and White Pepper)

1988 ◽  
Vol 71 (1) ◽  
pp. 53-55 ◽  
Author(s):  
Kenneth M Weaver ◽  
Michael E Neale ◽  
Ann Laneville
Keyword(s):  
Chromatographic Method ◽  
Piper Nigrum ◽  
Chromatographic System ◽  
Reverse Phase ◽  
White Pepper ◽  
Black And White ◽  
Liquid Chromatographic Method ◽  
Phase Liquid ◽  
Liquid Chromatographic

Abstract A method was developed for the detection and quantitation of piperine in Piper nigrum. A reverse-phase liquid chromatographic system equipped with a C18 column with detection at 340 nm was used. A rapid 1 h acetone extraction followed by solvent dilution was used to avoid sample cleanup. The detection limit is 3 ng injected piperine, with 97.5-100.5% recovery of added piperine.

APPLICATION OF PIXE TECHNIQUE TO DETERMINATION OF TRACE ELEMENTS IN DIET AND COMPARISON WITH NAA AND ICP-AES

1996 ◽  
Vol 06 (01n02) ◽  
pp. 395-403
Author(s):  
Masae Yukawa ◽  
Yoshito Watanabe ◽  
Yoshikazu Nishimura ◽  
Mieko Kimura
Keyword(s):  
Trace Elements ◽  
South America ◽  
Daily Intake ◽  
Radiation Doses ◽  
Internal Radiation ◽  
Pixe Analysis ◽  
Daily Dietary Intake ◽  
Elemental Concentrations ◽  
Total Diet

PIXE technique was applied to measurement of trace elements in total diet samples collected in Japan for estimation of their daily dietary intake. Results of PIXE analysis were compared with INAA Concentration of Cl, K, Mn and Zn by PIXE analysis well agreed with the results from NAA, while Ca, Fe and Cu showed different results between these two techniques. Preliminary data of elemental concentrations in Mate-cha, a kind of tea popular in South America, determined by ICP-AES indicated a little higher concentration of Cu than that by PIXE and much lower value than that by INAA For Zn. concentrations by PIXE and ICP well agreed to each other, while INAA gave much lower value. Japanese internal radiation doses by 137 Cs and 90 Sr were estimated to be 2.30µSv/year and 1.27µSv/year respectively as the effective dose equivalents using the daily intake data obtained for K and Ca.

scholarly journals Analysis of the 40K levels in soil using gamma spectrometry

2005 ◽  
Vol 48 (spe2) ◽  
pp. 221-228 ◽  
Author(s):  
José Araújo dos Santos Júnior ◽  
Jorge João Ricardo Ferreira Cardoso ◽  
Cleomacio Miguel da Silva ◽  
Suêldo Vita Silveira ◽  
Romilton dos Santos Amaral
Keyword(s):  
Gamma Spectrometry ◽  
Absorbed Dose ◽  
Soil Samples ◽  
Spectrometry Method ◽  
Dose Rates ◽  
Elemental Concentrations ◽  
High Purity Germanium ◽  
Specific Activities ◽  
Potassium 40

Potassium-40 was determined in soil in an area with 40,000 m² situated in the western State of Pernambuco, Brazil. For radiometric measurements, the gamma spectrometry method with a high purity germanium (HPGe) detector was used. Sampling of 78 soil samples has been performed at intervals of 25 m. The specific activities of 40K were calculated based on the photopeak of 1.46 MeV. Values from 541 to 3,572 Bq kg-1 were obtained (mean of 1,827 Bq kg-1). These values allowed the determination of the elemental concentrations as well as the absorbed dose rates in air, 1 m above the ground. The values varied from 1.7 to 11.5% (mean of 6%) and from 23.4 to 154.3 nGy h-1 (mean of 79 nGy h-1), respectively.

Diagnostic tool for the diagnosis of physiological and pathological conditions of the uterus in cows postpartum

2021 ◽  
Vol 49 (04) ◽  
pp. 229-233
Author(s):  
Isatay Jakupov ◽  
Zhanargul Karabayeva ◽  
Aida Abultdinova
Keyword(s):  
Dual Function ◽  
New Device ◽  
Black And White ◽  
Pathological Alteration ◽  
Uterine Involution ◽  
Pathological Conditions ◽  
New Instrument ◽  
Early Diagnose ◽  
Cattle Husbandry

Abstract Objective An important task of veterinarians in cattle husbandry is the early diagnosis of postpartum complications that can lead to infertility. The aim of the study was the evaluation of a new device to distinguish between physiological and pathological conditions of the uterus based on the determination of the time of uterine involution and the physicochemical properties of the vaginal discharge (lochia) during the first weeks after parturition. Material and methods A total of 173 black-and-white Holstein-Friesian dairy cows were examined for any pathological alteration of the uterine involution on days 1–2, 6–8, 11–14 postpartum and, in case of pathological findings, additionally on days 18–22, 23–27 and 28–30 after parturition. In addition to the standard examination a newly developed hand-held instrument (“Metrastatum”) was used to differentiate between physiological and pathological uterine involution. It allows determination of the distance between the cervix and vulva (DCV) and simultaneous collection of lochial secretions. Results The best time to use the new instrument was 10–16 days postpartum. In healthy cows without disturbed puerperium, the average DCV was 25.7 cm (± 0.8 cm) in this phase. This distance decreased by 12.5 ± 0.3 cm compared to the first days. In contrast, in cows with postpartum problems, the DCV was significantly greater at (31 ± 0.7 cm) (p < 0.001). In these animals, the AGV was reduced only by an average of 8.4 ± 0.6 cm when compared to the first days. The mucus obtained with the dome-shaped rubber funnel of the instrument also differed in the cows of the 2 groups. In healthy cows without puerperal problems, the lochia were thick, colorless, transparent and sometimes cloudy. In case of puerperal disorders, the discharge was thin, light red to reddish brown, contained flakes and had a nasty odor depending on the form of the inflammation. Conclusion The dual function of device helps to early diagnose puerperal disorders in cows and to select healthy animals for reproduction and sick cows for treatment depending on the form of uterine inflammation.

scholarly journals Determination of phenolic compounds and antioxidant activity of green, black and white teas of Camellia sinensis (L.) Kuntze, Theaceae

2014 ◽  
Vol 16 (3) ◽  
pp. 490-498 ◽  
Author(s):  
V.P Pereira ◽  
F.J Knor ◽  
J.C.R Vellosa ◽  
F.L Beltrame
Keyword(s):  
Camellia Sinensis ◽  
Plant Material ◽  
Radical Scavenging ◽  
Principal Component ◽  
Total Phenols ◽  
Considerable Variability ◽  
Dpph Radical ◽  
Black And White ◽  
Dpph Radical Scavenging

Green, black and white teas are all produced from leaves and shoots of Camellia sinensis, the only difference is how they are processed. The aim of this study was to compare the total phenols and flavonoid contents and antioxidant capacity of green, black and white tea bags of different brands. The morphodiagnosis of leaves was used to identification of plant material. HPLC-DAD fingerprinting coupled with Principal Component Analysis (PCA) was applied to analyze similarities of the tea samples. The results showed considerable variability between tea brands in both total phenols (30.55 to 60.85 mg of pyrogallol/g) and flavonoids (6.35 to 8.92 mg of quercetin/g). Green and white teas demonstrated the highest ABTS and DPPH radical scavenging activities.

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