In this study, Ni-doped MoS 2 was grown by chemical vapor transportation. Photoconductivity results reveal that Ni-doped MoS 2 has an obvious doping level of 1.2 eV and an electrical conductivity of σ `9.92 ' 10 %7 S cm %1 at room temperature, which is lower than that of undoped MoS 2 (σ `7.913 ' 10 %5 S cm %1 ) owing to the impurity state caused by Ni atoms. Hall effect measurement results indicate that Ni-doped MoS 2 sample is of the n-type and has a higher resistance and a lower mobility than undoped MoS 2 . We further fabricated undoped and Ni-doped MoS 2 photodetectors to understand the operation characteristics of MoS 2 -based photodetectors. Persistent photoconductivity shows that both rise and fall times decreased from 0.33/0.68 to 0.14/0.43 s as Ni atoms were doped in MoS 2 PDs. This work shows that Ni atoms could cause small lattice imperfections to form trap states leading to high resistance, low mobility, small activation energy and short decay time. Therefore, doping Ni atoms in MoS 2 is beneficial for the application of photodetectors.
Ocimum gratissimum (OG) was found to have immunity boosting effect on Taiwan country chickens and broiler chickens raised in moderate ambient temperature in previous studies, and the current study investigates its potential on the growth performance, blood traits, intestinal traits, and immune responses in Ross 308 broilers raised in high ambient temperature which can induce mild heat-stress (26-33˚C, average 30˚C). Two hundred one day-old male/female chicks were randomly assigned to a control group, three OG (1 g/kg, 3 g/kg, and 5 g/kg)/basal diet groups, and one Amoxicillin group. Data collected during the experiment indicated that the weight gain increase of 1742 g/bird to 1815 g/bird comparing control to 5 g/kg OG supplementation was statistically significant. In addition, the production efficiency factor (PEF) was also noticeably increased by OG, particularly in the 5 g/kg group, and the uric acid levels were decreased in the 3 g/kg and 5 g/kg OG groups (from 4.26 mg/dL to 2.91 mg/dL and 2.90 mg/dL, respectively), indicating heat-stress alleviation was observed. Several areas of the carcass saw desirable growth changes, including the increase of breast muscle ratio observed in the 5 g/kg OG group, an overall decrease in abdominal fat in all OG groups, as well as dimensional changes in several areas of the digestive system. Lastly, the hemaglutination, hemaglutination inhibition, and phytohemaglutinin tests indicated elevated immuno-response in all OG groups. In conclusion, OG has exhibited the ability to alleviate symptoms of mild heat-stress, leading to improvement of the digestive organ development and increase of carcass mass and mean weight gain for birds, and we find OG to be a potentially beneficial feed supplement for poultry raising in high-ambient temperature conditions.
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