大鼠隔区一氧化氮合酶阳性神经元的分布和脑缺血后的变化

大鼠隔区一氧化氮合酶阳性神经元的分布和脑缺血后的变化ＤＩＳＴＲＩＢＵＴＩＯＮＡＮＤＩＳＣＨＥＭＩＡＩＮＤＵＣＥＤＣＨＡＮＧＥＳＯＦＮＩＴＲＩＣＯＸＩＤＥＳＹＮＴＨＡＳＥＰＯＳＩＴＩＶＥＮＥＵＲＯＮＳＩＮＴＨＥＳＥＰＴＡＬＡＲＥＡＯＦＲＡＴ关键词大鼠...     

杏果实采后生理特征初探

杏果实采后生理特征初探杨映根,张立军,李钰（中国科学院植物研究所,北京１０００４４）ＳＴＵＤＩＥＳＯＮＴＨＥＰＯＳＴＨＡＲＶＥＳＴＰＨＹＳＩＯＬＯＧＩＣＡＬＰＲＯＰＥＲＴＩＥＳＯＦＡＰＲＩＣＯＴＦＲＵＩＴＹａｎｇＹｉｎｇ－ｇｅｎ;ＺｈａｎｇＬｉｊｕｎ...     

抗寒剂CR－4在克服我县水稻低温烂秧中的作用

抗寒剂ＣＲ－４在克服我县水稻低温烂秧中的作用赵玉华（甘肃高台县农业局７３４３００）ＥＦＦＥＣＴＯＦＴＨＥＰＬＡＮＴＣＯＬＤ－ＲＥＳＩＳＴＥＲＯＮＯＶＥＲＣＯ－ＭＩＮＧＲＩＣＥＳＥＥＤＬＩＮＧＤＥＣＡＹＩＮＬＯＷＴＥＭＰＥＲＡＴＵＲＥＳＴＲＥＳＳＩＮＯ...     

棕背鼠最适生境及其主导因子分析

棕背鼠最适生境及其主导因子分析ＴＨＥＯＰＴＩＭＡＬＢＩＯＴＯＰＥＯＦＬＡＲＧＥ－ＴＯＯＴＨＥＤＲＡＤ－ＢＡＣＫＥＤＶＯＬＥＡＮＤＴＨＥＡＮＡＬＹＳＥＳＯＦＩＴＳＭＡＩＮＦＡＣＴＯＲＳＫｅｙｗｏｒｄｓＬａｒｇｅ－ｔｏｏｔｈｅｄｒａｄ－ｄａｃｋｅｄｖｏｌ...     

桃果实采后生理特性初探

桃果实采后生理特性初探杨映根,张立军,李钰（中国科学院植物研究所,北京１０００４４）ＳＴＵＤＩＥＳＯＮＴＨＥＰＯＳＴＨＡＲＶＥＳＴＰＨＹＳＩＯＬＯＧＹＰＫＯＰＥＲＴＩＥＳＯＦＰＥＡＣＨＥＲＵＩＴＹａｎｇＹｉｎｇ－ｇｅｎ;ＺｈａｎｇＬｉ－ｊｕｎ;ＬｉＹ...     

荔枝胚胎发育的研究

荔枝胚胎发育的研究邱燕平,张展薇,丘荣熙（广东省农科院果树所,广州５１０６５０）（广东教育学院,广州５１０３０３）ＳＴＵＤＹＯＮＥＭＢＲＹＯＡＮＤＥＮＤＯＳＰＥＲＭＤＥＶＥＬＯＰＭＥＮＴＯＦＬＩＴＣＨＩＣＨＩＮＥＮＳＩＳＳＯＮＮ￥ＱｉｕＹａｎ－ｐｉｎ...     

钱菖蒲的挥发油研究

钱菖蒲的挥发油研究王蜀秀,温远影,胡昌序（中国科学院植物研究所,北京１０００４４）ＳＴＵＤＹＯＮＶＯＬＡＴＩＬＥＯＩＬＯＦＡＣＯＲＵＳＧＲＡＭＩＮＥＵＳＶＡＲ．ＰＵＳＩＬＵＳ￥ＷａｎｇＳｈｕ－ｘｉｕ;ＷｅｎＹｕａｎ－ｙｉｎｇ;ＨｕＣｈａｎｇ－Ｘｕ（Ｉ...     

原发性高血压患者和高血压大鼠红细胞形态的电镜观察

原发性高血压患者和高血压大鼠红细胞形态的电镜观察ＥＬＥＣＴＲＯＮＭＩＣＲＯＳＣＯＰＩＣＳＴＵＤＹＯＮＥＲＹＴＨＲＯＣＹＴＥＳＨＡＰＥＩＮＥＳＳＥＮＴＩＡＬＨＹＰＥＲＴＥＮＳＩＶＥＰＡＴＩＥＮＴＳＡＮＤＨＹＰＥＲＴＥＮＳＩＶＥＲＡＴＳ关键词高血压患者高...     

有害藻类及其微生物防治的基础：藻菌关系的研究动态

有害藻类及其微生物防治的基础──藻菌关系的研究动态赵以军,刘永定（中国科学院水生生物研究所,武汉,４３００７２）关键词藻类,细菌,病毒,真菌ＰＯＳＳＩＢＬＥＭＩＣＲＯＢＩＡＬＣＯＮＴＲＯＬＯＮＴＨＥＡＤＶＥＲＳＥＩＭＰＡＣＴＳＯＦＡＬＧＡＥ－ＣＵＲＲ...     

蝴蝶兰实生苗不同器官的离体培养

蝴蝶兰实生苗不同器官的离体培养张秀清王志武刘玉敬王春英（山东省农业科学院玉米研究所,济南２５０１００）ＴＨＥＣＵＬＴＵＲＥＯＦＤＩＦＦＥＲＥＮＴＯＲＧＡＮＳＯＦＰＨＡＬＡＥＮＯＰＳＩＳＳＥＥＤＬＩＮＧＳＩＮＶＩＴＲＯＺｈａｎｇＸｉｕ－ｑｉｎｇＷａｎｇ...     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

Enterovirus 71 3C proteolytically processes the histone H3 N-terminal tail during infection

Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions.     

Detection of EBV and HHV6 in the Brain Tissue of Patients with Rasmussen’s Encephalitis

Rasmussen’s encephalitis (RE) is a rare pediatric neurological disorder, and the exact etiology is not clear. Viral infection may be involved in the pathogenesis of RE, but conflicting results have reported. In this study, we evaluated the expression of both Epstein-Barr virus (EBV) and human herpes virus (HHV) 6 antigens in brain sections from 30 patients with RE and 16 control individuals by immunohistochemistry. In the RE group, EBV and HHV6 antigens were detected in 56.7% (17/30) and 50% (15/30) of individuals, respectively. In contrast, no detectable EBV and HHV6 antigen expression was found in brain tissues of the control group. The co-expression of EBV and HHV6 was detected in 20.0% (6/30) of individuals. In particular, a 4-year-old boy had a typical clinical course, including a medical history of viral encephalitis, intractable epilepsy, and hemispheric atrophy. The co-expression of EBV and HHV6 was detected in neurons and astrocytes in the brain tissue, accompanied by a high frequency of CD8⁺ T cells. Our results suggest that EBV and HHV6 infection and the activation of CD8⁺ T cells are involved in the pathogenesis of RE.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).     

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans.