Rooted in love – a journey through a dark time with a teenager and his family

2021 ◽  
pp. 90-94
Author(s):  
Zelda Alpern ◽  
Sully Swearingen ◽  
Cathy Swearingen ◽  
Marc Werner-Gavrin
Keyword(s):  
Dark Time

scholarly journals Prolonged Dark Time Within A 24-h Light Regime Improves Eggshell Quality by Enhancing Calcium Deposition in Laying Hens

2020 ◽  
Author(s):  
Qian Xin ◽  
Jingpeng Zhao ◽  
Hongchao Jiao ◽  
Haifang Li ◽  
Xiaojuan Wang ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Egg Production ◽  
Laying Hens ◽  
Light Regime ◽  
Calcium Deposition ◽  
Eggshell Quality ◽  
Dark Time ◽  
Calbindin D28k ◽  
Calcium And Phosphorus ◽  
Calcium Transporter

Abstract Background: The absorption and transportation of calcium and phosphorus is mainly relied on their corresponding transporters. Eggshell is mainly formed during dark time in one egg cycle. The aim of this study was to determine the effect of different light regime on eggshell quality and the expression of the relevant calcium and phosphorus transporters in laying hens. Seventy two 56-week-old laying hens were randomly divided into two groups and subjected to the following treatments: 16 h light: 8 h dark (control) and 9 h light: 15 h dark (LDP). The expression of phosphorus transporters type IIb Na/Pi co-transporter NaPi-IIa (NPt2a) and NaPi-IIb (NPt2b), calcium transporter calbindin-D28k (CaBP-D28k), and plasma membrane Ca ATPase 1b (PMCA1b) were measured in small intestine, kidney, and eggshell gland. Results: The results showed that the feed intake (P < 0.001) and egg weight (P = 0.05) was decreased by LDP treatment, while laying rate, egg production, and feed efficiency were not significantly influenced (P > 0.05). Compared to control, eggshell hardness was increased (P < 0.05) by LDP treatment whereas eggshell thickness and eggshell percentage were not significant changed. Eggshell calcium (Ca) and phosphorus (P) contents were elevated in LDP-hens, compared to control birds. Compared to control birds, serum Ca (P < 0.01) and P levels (P = 0.079) at dark time were increased in LDP-hens while and alkaline phosphatase (ALP) activity was lowered (P < 0.05). The protein expression levels of CaBP-D28k and PMCA1b were not influenced in duodenum but were decreased at light time in jejunum of LDP hens. In kidney, the expression of CaBP-D28k, PMCA1b and NPt2a were not changed by LDP treatment. In eggshell gland, however, the expression of CaBP-D28k and osteopontin (OPN) were relative higher in LDP hens compared to control birds, whereas the PMCA1b expression was not altered. Conclusions: The result indicates that the increased circulating Ca and P concentrations in dark time are favorable for the deposition of calcium and phosphorus in eggshell. The result offers an alternative strategy for the laying hen with a worse eggshell problem.

Deep Time, Dark Time

2018 ◽  
pp. 99-128
Author(s):  
Tavia Nyong'o
Keyword(s):  
Public Art ◽  
Women Of Color ◽  
Gilles Deleuze ◽  
Deep Time ◽  
Feminist Performance ◽  
Earth Art ◽  
Dark Time ◽  
Harryette Mullen ◽  
Performance Interventions ◽  
Kara Walker

By engaging interventionist art by women of color at two different scales—ephemeral body/earth art and monumental public art—this chapter supplements post-humanist theories of “deep time”—in particular, the temporality of the Anthropocene—with a concept of “dark time.” The intensive, alchemical, and obscure temporality of “dark time” is crucial to understanding black and brown feminist performance interventions against the violence of expropriative capitalism in the Americas. The chapter reads the art work of Kara Walker and Regina José Galindo through the poetry of Harryette Mullen and philosophy of Gilles Deleuze.

CHAPTER VI: Tending to Refute The Popular Prejudice Against the Present of a Pocket-Knife

2015 ◽  
Author(s):  
George Eliot
Keyword(s):  
Direct Effect ◽  
Dark Time

In That dark time of December, the sale of the household furniture lasted beyond the middle of the second day. Mr Tulliver, who had begun, in his intervals of consciousness, to manifest an irritability which often appeared to have as a direct effect the...

Echoes from the Holocaust: Philosophical Reflections on a Dark Time

1990 ◽  
Vol 13 (1) ◽  
pp. 168
Author(s):  
Rod Stackelberg ◽  
Alan Rosenberg ◽  
Gerald E. Myers
Keyword(s):  
Dark Time ◽  
The Holocaust

scholarly journals Impact of Space Debris and Space Reflectors on Ground-Based Astronomy

2001 ◽  
Vol 196 ◽  
pp. 188-192
Author(s):  
D. McNally
Keyword(s):  
Space Debris ◽  
Photographic Observation ◽  
Dark Time ◽  
Scientific Analysis ◽  
Decisive Action ◽  
Ccd Image

Astronomical fields under observation are being increasingly crossed by satellites. Such crossings either leave a “trail” on a photographic or CCD image, or corrupt a photographic observation. Such trailing/corruption may render an observation useless for scientific analysis. There is also the much more serious problem posed by suggestions to put solar reflectors in space for Earth illumination, artistic, celebratory or advertising purposes and, by extension, to longer term suggestions of ways to utilise dark time rather than twilight time. It is only a matter of time until the solar reflector becomes proven technology. The time left for decisive action may be very short.

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