Concept for power scaling by harmonic beam coaxial combination in an intra-cavity frequency doubling laser.

A new method of harmonic beam coaxial combination (HBCC) from two intra-cavity frequency doubling branches was demonstrated. Firstly, two identical nanosecond (ns) 532 nm green lasers with high power and good beam quality were created. Each green laser was constructed of an intra-cavity frequency doubling branch based on a laser diode (LD) end-pumped acousto-optical (AO) Q-switched 1064 nm Nd:YVO laser in a LiBO (LBO) nonlinear crystal.

Insights into the genetic spatial structure of Nicaraguan weedy rice and control of its seed spread.

Background: The genetic backgrounds and occurrence patterns of weedy rice (WR, Oryza sativa) are highly diverse, and so are the challenges facing its control among countries. WR control is difficult because it is similar to cultivated rice and manual removal is one of the few options for control. Understanding the ecology of WR will aid efforts to break its life cycle and establish long-term management strategies under both irrigated and rainfed systems.

Plagues of Desert Locusts: Very Low Invasion Risk to China.

Recently, the most serious upsurge of the desert locust () in the last 25 years is spreading across eastern Africa and southwestern Asia. Parts of the desert locust 'invasion area', namely the northern border areas of Pakistan and India, are very close to China, and whether locust swarms will invade China is of wide concern. To answer this question, we identified areas of potentially suitable habitat for the desert locust within China based on historical precipitation and temperature data, and found that parts of Xinjiang and Inner Mongolia provinces could provide ephemeral habitat in summer, but these places are remote from any other desert locust breeding areas.

Migratory Take-Off Behaviour of the Mongolian Grasshopper .

is one of the dominant species of grasshoppers in the rangeland on the Mongolian plateau, and a serious pest, but its migratory behavior is poorly known. We investigated the take-off behavior of migratory in field cages in the inner Mongolia region of northern China. The species shows a degree of density-dependent phase polyphenism, with high-density swarming populations characterized by a brown morph, while low-density populations are more likely to comprise a green morph.

The year 2020, a milestone in breaking the vicious cycle of poverty and illness in China.

Marking the end of the five-year programme initiated by the Chinese Government to lift more than 70 million people out of poverty, the year 2020 is a milestone. Poverty alleviation has moved strongly forward in China and the major health indicators are now better than the average of all middle- and high-income countries. However, the dual burden of infectious and chronic diseases remains a challenge with respect to achieving the health target in the United Nations 2030 Agenda for sustainable development goals (SDGs).

The Early Northward Migration of the White-Backed Planthopper () is Often Hindered by Heavy Precipitation in Southern China during the Preflood Season in May and June.

Seasonal weather systems that establish prevailing winds and seasonal rainfall on a large scale largely determine insect migration patterns, especially for micro-insects with completely windborne migration. Recent studies indicated that the summer migration of the brown planthopper (BPH, ) in eastern China is related to the strength and position of the Western Pacific Subtropical High-Pressure (WPSH) system and its associated wind and rainfall patterns. Compared with the BPH, the white-backed planthopper (WBPH, ) has a similar diet, analogous body size, and strong long-distance migration ability.

Gastric cancer incidence and mortality in Zhuanghe, China, between 2005 and 2010.

Aim: To investigate the incidence and mortality of gastric cancer (GC) in Zhuanghe region, northeast China and the influencing factors for their changing trends.

Methods: All new cancer cases and deaths registered from 2005 to 2010 in Zhuanghe County were reviewed. The annual GC cases, constituent ratio, crude rates, age-standardized rates, their sex and age distribution and temporal trends were assessed.

In vitro-activated tumor-bearing host T cells and the effectiveness of tumor vaccine immunotherapy.

Background And Objective: Vaccination during periods of lymphopenia may facilitate immune responses to weak self-antigens and enhance antitumor immunity. The objective of this study was to determine the effectiveness of tumor vaccine immunotherapy combined with immune reconstruction using tumor-bearing host immune cells in lymphopenia, and to investigate the role of tumor-bearing host T cells activated in vitro during immunotherapy.

Design And Setting: Animal study conducted in the First Affiliated Hospital of Xi'an Jiaotong University from January 2009 to January 2010.

[Evaluation of immune reconstitution with in vitro-activated T cells from a tumor-bearing host].

Aim: To evaluate the reconstituted immune system with in vitro-activated T cells from tumor-bearing rats coupled with ovarian cancer vaccination.

Methods: Fischer 344 female rats were injected with cyclophosphamide (CY) as a lymphopenia (LP) model. The immune systems of the rats were reconstituted with in vitro-activated T cells from the same individuals.

[Animal experiments of immunotherapy with ovarian tumor vaccine during lymphopenia induced by chemotherapy.].

Objective: To explore the mechanisms and effects of adoptive immunotherapy with ovarian cancer vaccine modified by GM-CSF gene which was used after immunologic reconstitution during lymphopenia induced by chemotherapy.

Methods: Lymphopenia was induced by chemotherapy with cyclophosphamide. The immune reconstituted model was built in rats.