Pure sulfide Cu2ZnSnS4 layers through a one-step low-temperature PLD technique: Insight into simulation on modified back contact to overcome the barrier of MoS2

2020 ◽  
Vol 262 ◽  
pp. 114701
Author(s):  
Maryam Heidariramsheh ◽  
Maryam Haghighi ◽  
Mohammad Mahdi Dabbagh ◽  
Seyed Mohammad Mahdavi
Marine Drugs ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 43
Author(s):  
Marco Mangiagalli ◽  
Marina Lotti

β-galactosidases (EC 3.2.1.23) catalyze the hydrolysis of β-galactosidic bonds in oligosaccharides and, under certain conditions, transfer a sugar moiety from a glycosyl donor to an acceptor. Cold-active β-galactosidases are identified in microorganisms endemic to permanently low-temperature environments. While mesophilic β-galactosidases are broadly studied and employed for biotechnological purposes, the cold-active enzymes are still scarcely explored, although they may prove very useful in biotechnological processes at low temperature. This review covers several issues related to cold-active β-galactosidases, including their classification, structure and molecular mechanisms of cold adaptation. Moreover, their applications are discussed, focusing on the production of lactose-free dairy products as well as on the valorization of cheese whey and the synthesis of glycosyl building blocks for the food, cosmetic and pharmaceutical industries.


Nanoscale ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 2871-2877 ◽  
Author(s):  
Ting Zhang ◽  
Feng Wang ◽  
Peng Zhang ◽  
Yafei Wang ◽  
Hao Chen ◽  
...  

The flexible perovskite photodetector, fabricated by a modified one-step method, showed a broadband spectrum response from blind ultraviolet to visible light, and exhibited excellent mechanical flexibility and improved environmental stability.


2009 ◽  
Vol 9 (1) ◽  
pp. 177-181 ◽  
Author(s):  
Kaili Lin ◽  
Jiang Chang ◽  
Yingjie Zhu ◽  
Wei Wu ◽  
Guofeng Cheng ◽  
...  

2014 ◽  
Vol 14 (3) ◽  
pp. 479-488 ◽  
Author(s):  
T. Backhaus ◽  
R. de la Torre ◽  
K. Lyhme ◽  
J.-P. de Vera ◽  
J. Meeßen

AbstractSeveral investigations on lichen photobionts (PBs) after exposure to simulated or real-space parameters consistently reported high viability and recovery of photosynthetic activity. These studies focused on PBs within lichen thalli, mostly exposed in a metabolically inactive state. In contrast, a recent study exposed isolated and metabolically active PBs to the non-terrestrial stressor UVC254 nm and found strong impairment of photosynthetic activity and photo-protective mechanisms (Meeßen et al. in 2014b). Under space and Mars conditions, UVC is accompanied by other stressors as extreme desiccation and low temperatures. The present study exposed the PBs of Buellia frigida and Circinaria gyrosa, to UVC in combination with desiccation and subzero temperatures to gain better insight into the combined stressors' effect and the PBs' inherent potential of resistance. These effects were examined by chlorophyll a fluorescence which is a good indicator of photosynthetic activity (Lüttge & Büdel in 2010) and widely used to test the viability of PBs after (simulated) space exposure. The present results reveal fast recovery of photosynthetic activity after desiccation and subzero temperatures. Moreover, they demonstrate that desiccation and cold confer an additional protective effect on the investigated PBs and attenuate the PBs' reaction to another stressor – even if it is a non-terrestrial one such as UVC. Besides other protective mechanisms (anhydrobiosis, morphological–anatomical traits and secondary lichen compounds), these findings may help to explain the high resistance of lichens observed in astrobiological studies.


1994 ◽  
Vol 89 (5) ◽  
pp. 425-427 ◽  
Author(s):  
Adly H. El Sayed ◽  
V. Calzona ◽  
M.R. Cimberle ◽  
R. Eggenhoffner ◽  
C. Ferdeghini ◽  
...  

2017 ◽  
Vol 2 (3) ◽  
pp. 390-396 ◽  
Author(s):  
Vinzent Strobel ◽  
Julian Jonathan Schuster ◽  
Andreas Siegfried Braeuer ◽  
Lydia Katharina Vogt ◽  
Henrik Junge ◽  
...  

A combination of operando Raman spectroscopy with online GC and volume-flow monitoring allows rapid insight into low-temperature methanol reforming.


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