山地麻晰繁殖生态的研究

１９９７年３月至１９９８年８月,在徐州市近郊的牛头山对山地麻晰的繁殖生态进行了研究。３～７月为繁殖期,其中４～５月为交配产卵盛期。雌雄性比为１１．６。从交配到产卵为２６天,卵白色、革质、椭圆形。长径平均为１．３７（１．２３～１．５３）ｃｍ,短径平均为０．８６（０．７～１．０６）ｃｍ,卵重平均为０．６（０．４～０．８５）ｇ,每窝平均产卵４．１（３～５）枚。孵化期为５０天。初孵出的小麻晰尾端为蓝绿色,     

水利建设对辽东半岛香鱼Plecoglossus altivelis的影响

辽东半岛水利建设造成洄游型香鱼资源下降,并在碧流河水库、转角楼水库形成了陆封型香鱼。陆封型香鱼发生了①个体小型化：体长和体重由洄游型香鱼的２０─２５ｃｍ（平均２２．６ｃｍ）,１５０─２５０ｇ（平均２０４ｇ）,分别下降到１０─１８ｃｍ（平均１３．６ｃｍ）,和１３─７３ｇ（平均３６．５ｇ）。②性状变异：洄游型香鱼体长为体高的３．７─４．７倍,为头长的４．５─５．３倍,而陆封型香鱼体长为体高的４．３─６．５倍,为头长的３．９─４．３倍。③怀卵量减少,产卵期提前：洄游型香鱼怀卵量为１．０─８．５万粒（平均３．１万位）．产卵盛期为９月底至１０月上旬,而陆封型香鱼的怀卵量为０．３２─０．６１万粒（平均０．４０万粒）,产卵盛期为９月上旬至下旬,提前２０ｄ左右。     

大蒜愈伤组织诱导条件初报

以白皮大蒜和大头蒜为材料,报道了大蒜品系、外植体的低温前处理、外植体大小及取材种类不同对愈伤组织诱导的影响。结果表明：（１）无论是４℃低温保藏或室温保存前处理,大头蒜的消毒效果均优于白皮大蒜,４℃低温前处理可降低外植体出愈污染;（２）只有带表皮的外植体才可诱导愈伤组织,外植体较大（０．５ｃｍ×０．３ｃｍ×０．２ｃｍ）,继代期愈伤组织产生量较多;外植体偏小（０．２ｃｍ×０．１ｃｍ×０．１ｃｍ）,极少产生愈伤组织;（３）４℃冷藏１８ｄ对大头蒜愈伤组织诱导有一定影响,但对白皮大蒜影响不大。冷藏可推迟出愈１～２ｄ。     

维生素C废水处理工程的技术改造及其效果

中原制药厂引进国外技术与设备生产葡萄糖,山梨醇,Ｖｃ等系列产品,日排废水７０００ｍ＾３左右,为了使废水达标排放,对引进处理工艺进行了合理的改造,改造后使容积负荷从３．０ｋｇＣＯＤ／ｍ＾３．ｄ提高到５．０ｋｇ／ＣＯＤ／ｍ＾３．ｄ,沼气产率从１．０ｍ＾３／ｍ＾３．ｄ,提高到３．０ｍ＾３／ｍ＾３．ｄ并最终达到了环保排放的要求。     

黑曲霉产木聚糖酶发酵条件的研究

正交设计试验结果表明,黑曲霉（Ａｓｐｅｒｇｉｌｌｕｓ ｎｉｇｅｒ ｍ１２）产木聚糖酶活力达７６．６０ｕ／ｍｌ,合适的产酶发酵条件如下,培养基（ｇ／Ｌ）：麸皮４０,尿素６．６７,ＫＨ２ＰＯ４ １．０,ＭｇＳＯ４．７Ｈ２Ｏ０．５,ＮａＣｌ０．３,Ｔｗｅｅｎ－８０ ３．０,ＣａＣＯ３ ２．０,２８℃,１２０ｒ／ｍｉｎ水浴振荡培养５．５ｄ。     

全缘金粟兰的组织培养和繁殖

１植物名称全缘金粟兰（Ｃｈｌｏｒａｎｔｈｕｓｈｏｌｏｓｔｅｇｉｕｓ）。２材料类别顶芽、带节的茎段。３培养条件（１）芽繁殖培养基：ＭＳ＋６－ＢＡ２．０～３．０ｍｇ·Ｌ－１（单位下同）＋ＩＢＡ０．２～０．３;（２）生根培养基：ＭＳ＋ＩＢＡ０．５。培养基中添加３％蔗糖,０．８％琼脂,ｐＨ５．８。培养温度为２５～２８℃,光照１２ｈ·ｄ－１,光照度约为１５００ｌｘ。４生长与分化情况４．１无菌材料的获得以芽尖和带腋芽的茎段为外植体,经消毒后,在超净工作台上,除掉部分叶片,将其接种于芽繁殖培养基上,经６０ｄ左…     

银王亮丝草的试管微繁殖

１植物名称银王亮丝草（Ａｇｌａｏｎｅｍａ　ｃｏｍ－ｍｕｔａｔｕｍｃｖ．"ＳｉｌｖｅｒＫｉｎｇ”）,又名银王粗肋草、银王万年青、银皇帝。２材料类别带腋芽的茎段。３培养条件以ＭＳ为基本培养基。芽诱导培养基附加６－ＢＡ２．０～２．５ｍｇ·Ｌ－１（单位下同）;芽增殖培养基附加６－ＢＡ４．０～４．５及ＮＡＡ０．０１～０．０２;生根培养基采用３／４ＭＳ附加ＩＢＡ３．０～３．５及ＧＡ３３,０。所有培养基蔗糖及琼脂含量分别为３％和０．７５％,ｐＨ值均调至５．８。培养温度２６～２８℃,光照８～１０ｈ·ｄ－１,光照…     

平菇丰收一号高产特性的研究

通过野生种分离选用的平菇丰收一号,染色体数为９（ｎ＝９）,菌丝生长速度比一般品种快２—３４ｃｍ／ｈ,平均投料０．５ｋｇ（块）产鲜菇０．６～２．５ｋｇ,个别单株重１０～２０ｋｇ左右,生物效率１００～１５０％,高者达２００％以上,是一种高产优质、适应性强的新菌种。     

黑山晋枣芽培养及值株再生研究

以珍稀、优质黑山晋枣液芽为外植体建立了原种无性繁殖系。继代繁殖培养基（ｍｇ／Ｌ）：ＭＳ＋ＢＡ０．１＋ＩＡＡ０．１和ＭＳ＋ＢＡ０．１＋ＩＢＡ０．５,培养３０ｄ平均苗高３．０－３．３ｃｍ,芽繁殖系数３．３－３．５;生根培养基为ＭＳ＋ＩＡＡ０．１＋ＩＢＡ０．２及ＭＳ＋ＩＡＡ０．２＋ＩＢＡ０．２两种,生根率８３．３％,培养４０ｄ平均具根苗高达４．９９ｃｍ,一次成苗,简化程序,缩短成苗期。移载成活率８３．０     

淀粉污水处理工程的设计和运行

淀粉污水采用厌氧－接触氧化－气浮综合处理,在水温２０℃、ＣＯＤ为９１６７ｍｇ／Ｌ条件下,厌氧段的容积负荷为９．２ｋｇＣＯＤ／ｍ＾３·ｄ,ＣＯＤ去除率为８４．７％好氧段的容积负荷为１．９ｋｇＣＯＤ／ｍ＾３·ｄ,ＣＯＤ的去除率为６４．１％,ＣＯＤ总去除率为９４．６％、ＢＯＤ的总去除率为９７％。工程总投资约为３００万元,日处理浓污水４００ｍ＾３,污水处理费为１．０￣１．２元／ｍ＾３。     

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.