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the use of exogenous nitric oxide (NO) on alleviating effects of UV-B light on
winter wheat development. Triticum
aestivum L. cv. Linyou 7287 seeds were irradiated with UV-B (10.08 kJ·m–2·d–1)
(enhanced UV-B) and watered with either water or 100 μmol·L–1 SNP
solution. Plants were also watered with the SNP alone. The results showed that
enhanced UV-B produced negative effects on seedling development. Leaf length
decreased and seedling biomass dropped significantly compared with the control.
Photochemical efficiency (Fv/Fm) dropped, and chlorophyll and carotenoid
content as well as the ATPase activity declined. Content of UV-absorbing compounds
and activity of the POD increased compared to the control. Application of the
SNP, a NO donor partially protected wheat seedlings exposed to elevated UV-B
radiation in that their leaf lengths and biomass accumulation were enhanced
compared to the UV-B treatment alone. SNP also improved the contents of chlorophyll,
carotenoid and UV-absorbing compounds in leaves. ATPase activity was enhanced
but no influence on POD activity. Furthermore, the application of SNP alone
showed a favorable effect on seedling growth compared with the control.
To explore the wheat seedling development and physiological responses
under copper contamination and enhanced
ultraviolet-B (UV-B) irradiation, 10 mg·L-1 CuCl2 solution was
irrigated to Triticum aestivum L. cv.
Linyuan 2069 one day after germination with or without ultraviolet-B (10.08 kJ m-2·d-1)
light exposure, respectively. The results showed that Cu2+ and UV-B
caused various adverse effects on wheat seedling development. Cu2+ hindered root development by significantly reducing root number, while UV-B
dwarfed seedling height and decreased the leaf length. Chlorophyll content and
activity of ATPase in thylakoid membrane of wheat leaves dropped significantly
under enhanced UV-B while the activity of ATPase in plasma membrane of seedling
root was significantly decreased in Cu2+ group. Relative electric
conductivity of leaves significantly increased in both Cu2+ and UV-B
groups, so did the biomass. We also observed that combined Cu2+ and
UV-B showed more adverse effects on wheat seedlings than either of them alone
except for root growth.
Spontaneous rupture of the iliac vein is rare clinical emergency.
Sudden onset, hypertension, and abdominal distention with a nonpulsatile mass
in the iliac fossa are the chief symptoms. We reported another case of
spontaneous rupture of the left external iliac vein diagnosed intra-operatively
and successfully treated with direct suturing. And related literatures
were reviewed. Possible etiology and optimal treatment were discussed.
This paper describes the hardware
implementation of the RANdom Sample Consensus (RANSAC) algorithm for featured-based
image registration applications. The Multiple-Input Signature Register (MISR)
and the index register are used to achieve the random sampling effect. The
systolic array architecture is adopted to implement the forward elimination
step in the Gaussian elimination. The computational complexity in the forward
elimination is reduced by sharing the coefficient matrix. As a result, the area
of the hardware cost is reduced by more than 50%. The proposed architecture is realized
using Verilog and achieves real-time calculation on 30 fps 1024 * 1024 video stream on 100
Bioavailability of nitrogen (N) and phosphorus (P) is known to affect marine phytoplankton physiology, thus influencing their primary productivity; and it’s of general interest to see how the N or/and P additions affect the differently cell-sized phytoplankton assemblages. Data from the northern South China Sea showed that P addition increased up to 6 times of total chl a content within 24 h in the estuarine water; and N+P addition increased more than 20 times of chl a within 144 h in the pelagic water. The P addition powered 18.0% and 149% increase in the carbon fixation of larger (>3 μm) and smaller (<3 μm) cell assemblies from the estuarine water, respectively; while the limited effects were observed between them in the pelagic water. Additions of N and P interactively increased the carbon fixation of both cell-sized assemblies in the pelagic water, but only small cell-sized fraction in the estuarine water. Moreover, the estuarine phytoplankton cells appeared to respond faster to the nutrient additions than the pelagic ones, and the smaller cells respond to a greater extent than their larger counterparts in the estuarine water but not in the pelagic water.