Photography. Black-and-white pictorial still camera negative film/process systems. Determination of ISO speed

1995 ◽  
Keyword(s):  
Process Systems ◽  
Black And White ◽  
Negative Film

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.

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.

RACE AND PHYSICAL ATTRACTIVENESS AS CRITERIA FOR WHITE SUBJECTS' DATING CHOICES

1976 ◽  
Vol 4 (2) ◽  
pp. 289-296 ◽  
Author(s):  
Bem. P. Allen
Keyword(s):  
Physical Attractiveness ◽  
White Male ◽  
Stimulus Person ◽  
Male And Female ◽  
Black And White ◽  
Males And Females ◽  
Female Subjects

Research involving race as a criterion for various social choices indicates that race may rival attractiveness for the determination of dating choices. This possibility was explored in two experiments involving “desirability for a date” ratings of black and white stimulus persons who varied in attractiveness. Experiment 1 results indicated that white male and female subjects gave appreciable weight to race and attractiveness, but females gave race more weight than attractiveness, while attractiveness was given more weight than race by males. The interaction between race and attractiveness had approximately the same form for males and females: attractive black stimulus persons were lumped together with unattractive stimulus persons.Female subjects in Experiment 2, who were informed about an opportunity to date a stimulus person of their choice before seeing slides of stimulus persons, tended to discount attractiveness as a criterion for choices. None of these subjects were willing to accept an actual date. It was noted that race may be a stronger rival to attractiveness relative to the more abstract factors with which attractiveness has been compared, because race, like attractiveness, is highly concrete and visible.

A High-Speed Black-and-White Negative Film

1960 ◽  
Vol 69 (10) ◽  
pp. 742-744 ◽  
Author(s):  
F. W. Spangler ◽  
H. R. Beilfuss
Keyword(s):  
High Speed ◽  
Black And White ◽  
Negative Film

A New High-Speed Black-and-White Camera Negative Film

1968 ◽  
Vol 77 (10) ◽  
pp. 1136-1136
Author(s):  
W. H. Bahler ◽  
M. L. Judd ◽  
F. W. Spangler ◽  
A. L. Williams
Keyword(s):  
High Speed ◽  
Black And White ◽  
Negative Film

scholarly journals Experimental studies of the transporting capacity of the pipe textured relief trays

2018 ◽  
Vol 251 ◽  
pp. 03033
Author(s):  
Vladimir Orlov ◽  
Irina Dezhina
Keyword(s):  
Suspended Solids ◽  
Protective Coatings ◽  
Experimental Studies ◽  
Practical Significance ◽  
Textured Surfaces ◽  
Black And White ◽  
Theoretical Approaches ◽  
Flow Transport ◽  
Inner Surface

The article presents an analysis of theoretical approaches to assessing the gravity pipeline efficiency in the transportation of water containing suspended solids (the sand). The attention is focused on application of the pipeline protective coatings used in their trenchless repair. Provision has been made of studying the problems of the removal of caked deposits on the pipe walls by creating a special pipeline textured inner surface, representing some kind of a relief, which favors the forced effect of flow turbulence in combination with the hydrophobic properties of the pipeline inner surface. The article presents the results of the research works on the creation of small-size hydraulic benches, which allow determination of the degree of the flow hydrophobicity and the transporting capacity along various textured surfaces (the pipeline protective coatings). The article describes the methods of work on the benches, types of obstacles and the nature of their arrangement along the length of the tray. Provision has been made of different options of the pipeline surface relief further improvement. The photo and film fixation, as well as the black-and-white shadow effects, have enabled presentation of the results of full-scale research experiments on the removal of various size suspended solids from the pipeline tray part. The micro-turbulence phenomena depending on the height of obstacles and their location have been described. The prospects and practical significance of the works aimed at improving the flow transport capacity have been assumed.

scholarly journals Utilization of digital photogrammetry in forestry mapping

2008 ◽  
Vol 53 (No. 5) ◽  
pp. 222-230
Author(s):  
S. Žíhlavník ◽  
F. Chudý ◽  
M. Kardoš
Keyword(s):  
Aerial Images ◽  
Control Points ◽  
Digital Photogrammetry ◽  
Infrared Images ◽  
Qualitative Aspect ◽  
Black And White ◽  
The Earth ◽  
Analogue To Digital ◽  
Product Costs

At present, photogrammetric interpretation of aerial images is a dominant method of forestry mapping. In the last years, transition from analogue to digital photogrammetry has been distinct. Digital photogrammetry enables to achieve workflow effectivity, and so to decrease the final product costs. The objective of the submitted paper was to evaluate the availability of digital photogrammetry for the forestry mapping rationalization. Digital aerotriangulation using the ImageStation SSK system brings more accurate results without requirements for the use of a larger amount of control points. The results also demonstrated the use of colour infrared aerial images, and also black and white aerial images at the scale 1:15,000 for the orthoimage creation in the forestry mapping department. Compared with the black and white aerial images, the colour infrared images have an essentially more interesting content, mainly from the qualitative aspect, which shifts them to use in many forestry disciplines (mostly for determination of the health conditions of forests stands, &hellip;), in combination with the remote sensing of the Earth and GIS (Geographic Information Systems).

Sign in / Sign up

Export Citation Format

Share Document