[Determination of Dichloromethane in Blood with Headspace Gas Chromatography and Gas Chromatography-Mass Spectrometry].

Objective: To establish a method for qualitative determination of dichloromethane (DCM) in blood by gas chromatography-mass spectrometry (GC-MS) and quantitative determination of DCM in blood by headspace gas chromatography (HS-GC), and to provide reliable support for forensic examination and analysis of poisoning or deaths caused by DCM.

Methods: 0.5 mL blood sample was collected, added into headspace vial with chloroform as the internal standard, and processed by heating at 65 °C and evacuation treatment.

[Current status and research advances of late spring coldness in wheat].

Low temperature disasters in wheat occur frequently in recent years, due to global warming. Late spring coldness in wheat during jointing-booting stage is one of the important factors limiting the yield and quality of wheat. Here, we summarized the occurrence characteristics (identification, classification, and space-time characteristics) of late spring coldness in wheat, and the effects of late spring coldness on physiological characteristics (leaf, stem, spike, and root), yield and quality of wheat.

Characterization of the Effect of Increased Plant Density on Canopy Morphology and Stalk Lodging Risk.

Plants react to the environment and to management interventions by undergoing architectural and structural modifications. A field trial was conducted in China in 2016 to study the effects of the plant population on morphological development of the maize canopy. The main objectives of the current study were (i) to characterize the effects of increased plant density on canopy morphology and stalk lodging and (ii) to explore the relationships between organ morphology and stalk lodging.

The application of biotechnology in medicinal plants breeding research in China.

Breeding is not only an important area of medicinal plants research but also the foundation for the superior varieties acquirement of medicinal plants. The rise of modern biotechnology provides good opportunities and new means for medicinal plants breeding research in China. Biotechnology shows its technical advantages and new development prospects in breeding of new medicinal plants varieties with high and stable yield, good quality, as well as stress-resistance.