Results 11 to 20 of about 23,532 (305)
Geometrical Proof of tan A + tan B + tan C = tan A tan B tan C [PDF]
Mathematical Notes, 1916 Let ABC be the Δ, AD ⊥ to BC produced to meet circumcircle in K, BL a diameter of circumcircle, LM ⊥ to AK. Let BK, KG, CL and LA be joined.
openaire +1 more source
Angewandte Chemie International Edition, 2020 "My biggest motivation is to make a creative and significant contribution in several research fields … My favorite saying is to try our best without regret " Find out more about Bin Tan in his Author Profile.
openaire +2 more sources
Molecules, 2022 For a long time, the production and processing of cowhide was based on the use of chrome tanning. However, the growing problem with chromium waste and its negative impact on human health and the environment prompted the search for more environmentally ...
Sanja Ercegović Ražić +5 more
doaj +1 more source
Three New Flavonoids from Aerial Parts of L
Natural Product Communications, 2007 Three new flavonoids, namely 6-methoxyluteolin-4′-O-lactate, apigenin-4′-O-α-L-rhamnopyranoside and tamarixetin-3-{O-[β-D-glucopyranosyl-(1→2)]-α-L-rhamnopyranoside}-7-O-β-D-glucopyranoside, together with six known flavones have been isolated from the ...
Josline Y. Salib, Helana N. Michael
doaj +1 more source
BMC Public Health, 2019 Background Norway has one of the highest incidences of melanoma in the world. It has been suggested that the majority of all skin cancers could be prevented by changes related to sun-tanning behaviour. This study explores the sun-tanning behaviour of the
Hanne Stavenes Støle +2 more
doaj +1 more source
Geometrical Proof of tan A + tan B + tan C = tan A tan B tan C [PDF]
Mathematical Notes, 1915 Let ABC be the Δ, AD and BE ⊥s to BC and AC, CK and BM ⊥s to ED.
openaire +1 more source
Journal of Dermatology and Dermatologic Surgery, 2017 Recreational tanning has become popular among young Saudi women. This study investigates whether Saudi female college students are practicing recreational tanning and analyzes the level of their awareness regarding the consequences of tanning as a cause ...
Najla A. Al-Dawsari, Rana K. Shahab
doaj +1 more source
Journal of Skin Cancer, 2014 Introduction. Adolescent use of indoor tanning facilities is associated with an increased risk in later development of melanoma skin cancers. States that have imposed age restrictions on access to indoor tanning generally show lower self-reported rates ...
Rebecca G. Simmons +3 more
doaj +1 more source
Tanning Performance of a Novel Chrome-Free Complex Tanning Agent: Penetration and Distribution [PDF]
, 2021 Penetration of tanning agent in leather plays an important role in tanning performance and properties of finished leather. A novel complex tanning agent composed of Al–Zr salts and highly-oxidized starch ligand, named TWLZ, was used for chrome-free ...
Yu, Yue +3 more
core +1 more source
GREEN TECHNOLOGY ON TANNING PROCESS BY EXHAUSTED TANNING SYSTEM [PDF]
, 2018 This study aims to determine the difference of chromium absorption into the skin and difference the shrinkage temperature in chrome mineral tanning by exhausted tanning system and conventional tanning system. The material used were sheep skins. The first
Nugroho, Alfani Risman +1 more
core +1 more source