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Colletotrichum species are well-known plant pathogens, saprobes, endophytes, human pathogens and entomopathogens. However, little is known about Colletotrichum as endophytes of plants and cultivars including Citrus grandis cv. “Tomentosa”. In the present study, 12 endophytic Colletotrichum isolates were obtained from this host in Huazhou, Guangdong Province (China) in 2019. Based on morphology and combined multigene phylogeny [nuclear ribosomal internal transcribed spacer (ITS), glyceraldehyde-3-phosphate dehydrogenase (gapdh), chitin synthase 1 (chs-1), histone H3 (his3) actin (act), beta-tubulin (β-tubulin) and glutamine synthetase (gs)], six Colletotrichum species were identified, including two new species, namely Colletotrichum guangdongense and C. tomentosae. Colletotrichum asianum, C. plurivorum, C. siamense and C. tainanense are identified as being the first reports on C. grandis cv. “Tomentosa” worldwide. This study is the first comprehensive study on endophytic Colletotrichum species on C. grandis cv. “Tomentosa” in China.

Normal naked 3D display have some defects,such as fixed viewing point,narrow viewing angle.In order to enhance the 3D performance,a 3D display system base on head tracking is introduced.In this system,a camera detects the position of observer's face,and a LC barrier moves the 3D viewing point toward the face simultaneously by changing its transmissive area.Thus the observer can receive good 3D images freely within the visual field of the camera.Because there is no meteyard for this wide viewing angle 3D display,this paper puts forward a test method.The experiment result proved the method is viable.

This paper introduces the principle,design solution and verification method of auto-stereoscopic display using an electric-field-driven LC lens.In order to realize the optimal 3D performance,professional software simulation and trail verification were used to adjust the design solution.It provides that a novel design about the electrode,specially discuss the distribution law of cell gap and refractive index,and the effect of retardation on 3D crosstalk.Using novel electrode structure and the rule of LC cell retardation to design electric-field-driven LC lens,3D crosstalk can be reduced to below 3%,the 3D module show excellent 3D image quality.It has very important significance to design and study the electric-field-driven LC lens.

The input macro block was used in the design of a signal receiver that turned LVDS signal into CMOS signal.The terminal resistors were analyzed;two methods of using terminal resistance were illustrated.The principle and the using of FPGA embedded resis-tance were emphatically analyzed.DDR technology was used,the method of using 3.5 times clock frequency to process 7 times data was researched and the frequency of data process was reduced.A serial to parallel converter was designed by using the data buffer.The method of data alignment and the two signal mapping formats supported by OpenLDI were analyzed.The data that conforms to the two standard data mapping format was output by using a data distributor.Combining with the characteristics of the Xilinx's FPGA clock processing macro block,the method of the clock recovering was researched.The periodic constraints,the special constraints,and the location constraints were used to improve the reliability of system.In order to improve the signal integrity of the whole circuit board and reduce the complexity of PCB layout,the method of inverting LVDS signals was studied.

In order to find out the infectious rate of hepatitis C virus (HCV) among chronic liver diseases, we investigated antibodies against hepatitis C virus and HCVRNA by method of ELISA, RIBA and RT-PCR in 410 patients with chronic liver disease. The prevalence of HCV infection was found to be 4%. Whereas the positive rate of HBsAg and HBV-DNA of these cases was 69% and 58%, respectively. There is no statistical significance between HCV infectious rate of patients with positive and negative HBsAg. The relative low infectious rate of HCV infection among chronic hepatic diseases indicates that HBV infection plays a more important role in causing chronic hepatitis than that of HCV. Thus, special emphasis should be paid to the preventive and therapeutic measures against hepatitis B in China.

We derive a formula of the nonadiabatic noncyclic Pancharatnam phase for a quantum spin-1/2 particle subject to an arbitrary magnetic field. The formula is applied to three specific kinds of magneic fields. (i) For an orientated magnetic field, the Pancharatnam phase is derived exactly. (ii) For a rotating magnetic field, the evolution equation is solved analytically. The Aharonov-Anandan phase is obtained exactly and the Pancharatnam phase is computed numerically. (iii) We propose a kind of topological transition in one-dimensional mesoscopic ring subject to an in-plane magnetic field, and then address the nonadiabatic noncyclic effect on this phenomenon., Comment: 6 pages and 3 figures