The objective of this work was to carry out a morphological characterization of arbuscular mycorrhizal fungi in the rhizosphere of Xanthosoma sagittifolium L. Schott plants. The plant material used was the white and r...The objective of this work was to carry out a morphological characterization of arbuscular mycorrhizal fungi in the rhizosphere of Xanthosoma sagittifolium L. Schott plants. The plant material used was the white and red cultivars of X. sagittifolium, belonging to age intervals of 3 - 6, 6 - 9, and 9 - 12 months. Three harvest sites were chosen in the Central Region of Cameroon. In each site, soil from the rhizosphere and plant roots was collected in a randomized manner. In the field, the agronomic parameters were evaluated. The physicochemical characteristics of the soils, the mycorrhization index, and the morphological characterization of the mycorrhizal types of each site were carried out. The results obtained show that the agronomic growth parameters varied significantly using the Student Newman and Keuls Test depending on the harvest sites. The soils’ pH in all sites was acidic and ranged between 4.6 and 5.8. The Nkometou site has a loamy texture while the Olembe and Soa sites have loam-clay-sandy and loam-clay textures respectively. The highest mycorrhization frequencies appeared at the Nkometou site, with 75 and 87.33% of the white and red cultivars plant roots at 6 - 9 and 3 - 6 months. The relative abundance of AMF arbuscular mycorrhizal fungal spores in the rhizosphere of X. sagittifolium plants varied with age and cultivar. There were 673 spores between 9 - 12 months in Nkometou in the red cultivar. Six AMF genera were identified in all the different soils collected: Acaulospora sp., Funneliformis sp., Gigaspora sp., Glomus sp., Scutellospora sp., and Septoglomus sp. The genus Glomus sp. was the most present at all age intervals in both cultivars.展开更多
Taro （Colocasia esculenta L. Schott） is an important underutilised crop in South Africa, East Africa and Indonesia. Three taro landraces, namely, Dumbe Lomfula （wild）, KwaNgwanase and Umbumbulu, were collected fro...Taro （Colocasia esculenta L. Schott） is an important underutilised crop in South Africa, East Africa and Indonesia. Three taro landraces, namely, Dumbe Lomfula （wild）, KwaNgwanase and Umbumbulu, were collected from two locations in KwaZulu-Natal （KZN）, South Africa, and planted at two locations, Pietermaritzburg （KZN） and Roodeplaat, Pretoria. Ago-morphological characterisation of vegetative and corm characteristics were done four months after planting and at harvest, respectively. Sampling for DNA fingerprinting using five SSR primers was done using leaf material four months after planting. Agro-morphological characterisation was useful in showing differences between the wild landrace and the two cultivated landraces, as well as identification of dasheen and eddoe types. SSR primer characterisation showed that despite significant morphological difference, the wild Dumbe Lomfula and Umbumbulu landraces were closely related but different from the KwaNgwanase landrace. Although landraces showed great morphological variation, this did not necessarily imply genetic variation. It is concluded that SSR primers are more useful for characterising taro landraces.展开更多
SCHOTT公司的Tubing Business Segment推出两种新型璃型产品：8688(基于钨)和8271(kovar)。两种型号都具有特殊UV屏蔽效果，以防止塑料元件过早老化。造成塑料元件损伤的UV辐射是波长在254nm和313nm之间的不可见光。两种玻璃产品据称是...SCHOTT公司的Tubing Business Segment推出两种新型璃型产品：8688(基于钨)和8271(kovar)。两种型号都具有特殊UV屏蔽效果，以防止塑料元件过早老化。造成塑料元件损伤的UV辐射是波长在254nm和313nm之间的不可见光。两种玻璃产品据称是第一种在玻璃结构中融入有效UV滤光器的产品、而且滤光波长正好落在这一范围的产品，因此在后续阶段无需添加复杂涂层。展开更多
A traditional process used by farmers in Chad consists in soaking slices of taro (Colocasia esculenta L. SCHOTT) in tamarind infusion, or in corn solution or in water over a 24-hour period to reduce the acridity of ta...A traditional process used by farmers in Chad consists in soaking slices of taro (Colocasia esculenta L. SCHOTT) in tamarind infusion, or in corn solution or in water over a 24-hour period to reduce the acridity of taro and facilitate cooking. The aim of this study was to assess the effect of traditional soaking on the in vitro digestibility of taro flour using or not using an α-amylase enzyme. The digestion without the enzyme has shown that the soaking processes improve the digestibility of taro flour (from 39.30% for the control sample to 75.11% (after tamarind infusion) and 78.67% (treatment with water) after 24 hours of soaking). Soaking over a 6-hour period and preferentially in tamarind infusion or in corn solution obtains highly digestible flour (around 95% of digestibility rate after 3 hours of enzymatic digestion).展开更多
This design is presented of a 2 × 2 planar array, with a half-wave dipole antenna to be its element, on a new substrate material, Schott Borofloat, with CMOS technology in the 60 GHz band. In the proposed structu...This design is presented of a 2 × 2 planar array, with a half-wave dipole antenna to be its element, on a new substrate material, Schott Borofloat, with CMOS technology in the 60 GHz band. In the proposed structure, all the designs are based on the CMOS technology and similar performance could be achieved with the same size in contrast to the design on low-temperature co-fired ceramic （LTCC）. This could lead to the improving of the compatibility with the CMOS IC process, the design cost and the design precision which is restricted in the LTCC process. The simulated-10 dB bandwidth of the array is from 58 to 64 GHz. A peak gain of 9.4 dBi is achieved. Good agreement on return loss is achieved between simulations and measurements.展开更多
目的基于网络药理学分析石菖蒲主要成分治疗神经退行性疾病(neurodegenerative diseases,ND)的作用靶点和机制。方法利用TCMSP(traditional Chinese medicine systems pharmacology database and analysis platform)数据库检索和既往文...目的基于网络药理学分析石菖蒲主要成分治疗神经退行性疾病(neurodegenerative diseases,ND)的作用靶点和机制。方法利用TCMSP(traditional Chinese medicine systems pharmacology database and analysis platform)数据库检索和既往文献证明得到石菖蒲的主要有效成分。在GeneCards,OMIM(Online Mendelian Inheritance in Man),TTD(Therapeutic Target Database)数据库检索ND的相关靶点,并用Uniprot数据库进行标准化。构建ND和石菖蒲有效成分的共有靶点韦恩图和PPI网络图,进行GO(Gene ontology)注释和京都基因与基因组百科全书(Kyoto encyclopedia of genes and genomes,KEGG)通路富集分析,展示石菖蒲有效成分在治疗ND过程中疾病-靶点的关系。结果石菖蒲和ND的共有靶点总计为41个,关键靶点主要有FOS、ACHE、SLC6A4、ADRA1B、ADRA2A、MAOB、PTGS2、ADRA1A等。这些靶点涉及G蛋白偶联的胺受体活性、肾上腺素受体活性、儿茶酚胺结合、类固醇激素受体活性、神经递质受体活性、突触后神经递质受体活性等与突触间神经递质及其受体密切相关的生物过程、钙信号通路、cGMP-PKG信号通路和唾液分泌通路等信号通路。结论石菖蒲的主要有效成分可能通过对FOS、ACHE、SLC6A4、ADRA1B、MAOB等蛋白及相关通路的影响进而对神经神经递质受体或突触的损伤修复发挥治疗ND的作用,这为石菖蒲有效成分治疗ND的作用机制提供了新方向。展开更多
文摘The objective of this work was to carry out a morphological characterization of arbuscular mycorrhizal fungi in the rhizosphere of Xanthosoma sagittifolium L. Schott plants. The plant material used was the white and red cultivars of X. sagittifolium, belonging to age intervals of 3 - 6, 6 - 9, and 9 - 12 months. Three harvest sites were chosen in the Central Region of Cameroon. In each site, soil from the rhizosphere and plant roots was collected in a randomized manner. In the field, the agronomic parameters were evaluated. The physicochemical characteristics of the soils, the mycorrhization index, and the morphological characterization of the mycorrhizal types of each site were carried out. The results obtained show that the agronomic growth parameters varied significantly using the Student Newman and Keuls Test depending on the harvest sites. The soils’ pH in all sites was acidic and ranged between 4.6 and 5.8. The Nkometou site has a loamy texture while the Olembe and Soa sites have loam-clay-sandy and loam-clay textures respectively. The highest mycorrhization frequencies appeared at the Nkometou site, with 75 and 87.33% of the white and red cultivars plant roots at 6 - 9 and 3 - 6 months. The relative abundance of AMF arbuscular mycorrhizal fungal spores in the rhizosphere of X. sagittifolium plants varied with age and cultivar. There were 673 spores between 9 - 12 months in Nkometou in the red cultivar. Six AMF genera were identified in all the different soils collected: Acaulospora sp., Funneliformis sp., Gigaspora sp., Glomus sp., Scutellospora sp., and Septoglomus sp. The genus Glomus sp. was the most present at all age intervals in both cultivars.
文摘Taro （Colocasia esculenta L. Schott） is an important underutilised crop in South Africa, East Africa and Indonesia. Three taro landraces, namely, Dumbe Lomfula （wild）, KwaNgwanase and Umbumbulu, were collected from two locations in KwaZulu-Natal （KZN）, South Africa, and planted at two locations, Pietermaritzburg （KZN） and Roodeplaat, Pretoria. Ago-morphological characterisation of vegetative and corm characteristics were done four months after planting and at harvest, respectively. Sampling for DNA fingerprinting using five SSR primers was done using leaf material four months after planting. Agro-morphological characterisation was useful in showing differences between the wild landrace and the two cultivated landraces, as well as identification of dasheen and eddoe types. SSR primer characterisation showed that despite significant morphological difference, the wild Dumbe Lomfula and Umbumbulu landraces were closely related but different from the KwaNgwanase landrace. Although landraces showed great morphological variation, this did not necessarily imply genetic variation. It is concluded that SSR primers are more useful for characterising taro landraces.
文摘SCHOTT公司的Tubing Business Segment推出两种新型璃型产品：8688(基于钨)和8271(kovar)。两种型号都具有特殊UV屏蔽效果，以防止塑料元件过早老化。造成塑料元件损伤的UV辐射是波长在254nm和313nm之间的不可见光。两种玻璃产品据称是第一种在玻璃结构中融入有效UV滤光器的产品、而且滤光波长正好落在这一范围的产品，因此在后续阶段无需添加复杂涂层。
基金grateful to Chad French Ambassy for the financing of this project.
文摘A traditional process used by farmers in Chad consists in soaking slices of taro (Colocasia esculenta L. SCHOTT) in tamarind infusion, or in corn solution or in water over a 24-hour period to reduce the acridity of taro and facilitate cooking. The aim of this study was to assess the effect of traditional soaking on the in vitro digestibility of taro flour using or not using an α-amylase enzyme. The digestion without the enzyme has shown that the soaking processes improve the digestibility of taro flour (from 39.30% for the control sample to 75.11% (after tamarind infusion) and 78.67% (treatment with water) after 24 hours of soaking). Soaking over a 6-hour period and preferentially in tamarind infusion or in corn solution obtains highly digestible flour (around 95% of digestibility rate after 3 hours of enzymatic digestion).
文摘This design is presented of a 2 × 2 planar array, with a half-wave dipole antenna to be its element, on a new substrate material, Schott Borofloat, with CMOS technology in the 60 GHz band. In the proposed structure, all the designs are based on the CMOS technology and similar performance could be achieved with the same size in contrast to the design on low-temperature co-fired ceramic （LTCC）. This could lead to the improving of the compatibility with the CMOS IC process, the design cost and the design precision which is restricted in the LTCC process. The simulated-10 dB bandwidth of the array is from 58 to 64 GHz. A peak gain of 9.4 dBi is achieved. Good agreement on return loss is achieved between simulations and measurements.
文摘目的基于网络药理学分析石菖蒲主要成分治疗神经退行性疾病(neurodegenerative diseases,ND)的作用靶点和机制。方法利用TCMSP(traditional Chinese medicine systems pharmacology database and analysis platform)数据库检索和既往文献证明得到石菖蒲的主要有效成分。在GeneCards,OMIM(Online Mendelian Inheritance in Man),TTD(Therapeutic Target Database)数据库检索ND的相关靶点,并用Uniprot数据库进行标准化。构建ND和石菖蒲有效成分的共有靶点韦恩图和PPI网络图,进行GO(Gene ontology)注释和京都基因与基因组百科全书(Kyoto encyclopedia of genes and genomes,KEGG)通路富集分析,展示石菖蒲有效成分在治疗ND过程中疾病-靶点的关系。结果石菖蒲和ND的共有靶点总计为41个,关键靶点主要有FOS、ACHE、SLC6A4、ADRA1B、ADRA2A、MAOB、PTGS2、ADRA1A等。这些靶点涉及G蛋白偶联的胺受体活性、肾上腺素受体活性、儿茶酚胺结合、类固醇激素受体活性、神经递质受体活性、突触后神经递质受体活性等与突触间神经递质及其受体密切相关的生物过程、钙信号通路、cGMP-PKG信号通路和唾液分泌通路等信号通路。结论石菖蒲的主要有效成分可能通过对FOS、ACHE、SLC6A4、ADRA1B、MAOB等蛋白及相关通路的影响进而对神经神经递质受体或突触的损伤修复发挥治疗ND的作用,这为石菖蒲有效成分治疗ND的作用机制提供了新方向。
