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RpL38 modulates germ cell differentiation by controlling bam expression in Drosophila testis

Science China(Life Sciences) 2024年第11期67卷 2411-2425页

作者： Yang Fang Fengchao Zhang Fangzhen Zhao Jiajia Wang Xinkai Cheng Fei Ye Jiayu He Long Zhao Ying Su Key Laboratory of Evolution&Marine Biodiversity(Ministry of Education)and Institute of Evolution&Marine Biodiversity Ocean University of ChinaQingdao 266003China College of Marine Life Sciences Ocean University of ChinaQingdao 266003China Fisheries College Ocean University of ChinaQingdao 266003China

Switching from mitotic spermatogonia to meiotic spermatocytes is critical to producing haploid sperms during male germ cell ***,the underlying mechanisms of this switch remain largely *** Drosophila melanogaster,the gene RpL38 encodes the ribosomal protein L38,one component of the 60S subunit of *** found that its depletion in spermatogonia severely diminished the production of mature sperms and thus led to the infertility of male *** examining the germ cell differentiation in testes,we found that RpL38-knockdown blocked the transition from spermatogonia to spermatocytes and accumulated spermatogonia in the *** understand the intrinsic reason for this blockage,we conducted proteomic analysis for these spermatogonia *** from the control spermatogonia,the accumulated spermatogonia in RpL38-knockdown testes already expressed many spermatocyte markers but lacked many meiosis-related proteins,suggesting that spermatogonia need to prepare some important proteins for meiosis to complete their switch into ***,we found that the expression of bag of marbles(bam),a crucial determinant in the transition from spermatogonia to spermatocytes,was inhibited at both the mRNA and protein levels upon RpL38 *** also confirmed that the bam loss phenocopied RpL38 RNAi in the testis phenotype and transcriptomic ***,overexpressing bam was able to fully rescue the testis abnormality and infertility of RpL38-knockdown flies,indicating that bam is the key effector downstream of RpL38 to regulate spermatogonia ***,our data suggested that germ cells start to prepare meiosis-related proteins as early as the spermatogonial stage,and RpL38 in spermatogonia is required to regulate their transition toward spermatocytes in a bamdependent manner,providing new knowledge for our understanding of the transition process from spermatogonia to spermatocytes in Drosophila

关键词： Drosophila melanogaster spermatogenesis RpL38 spermatogonia bam

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Studies　on　Porphyrin　and　Phthalocyanine　Monolayers　by　Means　of　Compression－Recompression　Isotherms　and　bam

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Chinese Chemical Letters 1996年第11期7卷 1041-1042页

作者： Wang, WS Li, W Xi, SQ CHINESE ACAD SCI CHANGCHUN INST APPL CHEMCHANGCHUN 130022PEOPLES R CHINA

Monolayers of porphyrin and phthalocyanine at the air-water interface were studied bymeans of film balance and Brewster angle microscopy (bam). ResultS showed that the final point ofcompression isotherm and that of recompression isotherm were coincident or not coincidentdepending on the target pressures. Results were discussed in terms of the morphology of monolayersobserved by bam.

关键词： bam and Isotherms Means Monolayers Phthalocyanine Porphyrin Studies Recompression

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High-Order bam, Its Modifications and Performance Analyses

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Journal of China Textile University(English Edition) 1998年第4期15卷 27-30页

作者：郑建立陈松灿 China Textile Univ Shanghai China

Based on Tai’ s high - order bidirectional associative memory ( HObam) and Stmposon’ s intraconnected bam (Ibam) , two Improved models are first presented and discussed in this paper. The improved models not only retain the advantages of both HObam and ISAM but overcome the shortcomings of Kosko’ s bam also. Secondly their recall stabilities in synchronous and asyn-chronous update modes have been proven by defining corresponding energy functions which decrease as the re-call process proceeds such that the systems can ensure all the training pattern pairs to become local minima of the energy surfaces. Finally with signal - to - noise ratio (SNR) approach, we show that their storage capacities and error correction capabilities are better than that of the HObam.

关键词： bidirectional associative memory ( bam ) higher - order stability capacity SNR intraconnection neu-ral network

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bam、BaCoTiM、BaZnTiM的柠檬酸溶胶-凝胶合成及其微波介电性能、磁性能研究

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功能材料 2003年第3期34卷 269-271页

作者：张海军姚熹张良莹吴明忠郑州大学高温材料研究所河南郑州450052 同济大学功能材料研究所上海200092

　采用柠檬酸sol gel工艺,以柠檬酸铁、碳酸钡、硝酸钴、硝酸锌、钛酸四丁酯以及柠檬酸等为原料合成了BaFe12O19、Ba(CoTi)xFe12-2xO19、Ba(ZnTi)xFe12-2xO19(x=0.2、0.6、1.0)铁氧体。采用XRD、SEM对其相成分和显微结构进行研究。并对... 详细信息

　采用柠檬酸sol gel工艺,以柠檬酸铁、碳酸钡、硝酸钴、硝酸锌、钛酸四丁酯以及柠檬酸等为原料合成了BaFe12O19、Ba(CoTi)xFe12-2xO19、Ba(ZnTi)xFe12-2xO19(x=0.2、0.6、1.0)铁氧体。采用XRD、SEM对其相成分和显微结构进行研究。并对其复介电常数、复磁导率在1MHz～6GHz下的变化规律进行了研究。结果表明3种铁氧体的复介电常数随微波测试频率的增加而变小,其磁导率虚部随测试频率的变化曲线上显示出非常明显的由畴壁共振引起的共振峰,该共振峰随铁氧体粉末热处理温度的升高移向低频。

关键词： bam BaCoTiM BaZnTiM 溶胶-凝胶柠檬酸磁性能微波介电性能铁氧体

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Earthquake Disaster Risk Reduction in Iran:Lessons and "Lessons Learned" from Three Large Earthquake Disasters——Tabas 1978,Rudbar 1990,and bam 2003

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International Journal of Disaster Risk Science 2015年第4期6卷 415-427页

作者： Michaela Ibrion Mohammad Mokhtari Farrokh Nadim Department of Geography Faculty of Social Sciences and Technology ManagementNorwegian University of Science and Technology(NTNU) National Center for Earthquake Prediction and Seismological Research International Institute of Earthquake Engineering and Seismology(IIEES) Natural Hazards Debris Slides and Geo RiskNorwegian Geotechnical Institute(NGI)

This article addresses three large earthquake disasters in Iran: Tabas in 1978, Rudbar in 1990, and bam in 2003. Lessons and 'Lessons Learned' from these three earthquake disasters were investigated together with their contributions over time towards earthquake disaster risk reduction in Iran. Many lessons from 1978 Tabas, 1990 Rudbar, and 2003 bam did not become 'Lessons Learned' and they were identified again within the dramatic context of other earthquake disasters in various places of Iran. Both lessons and 'Lessons Learned' from Tabas, Rudbar, bam,and other earthquake disasters in Iran require a sustainable long-term framework—an earthquake culture.

关键词： bam Earthquake disaster risk reduction Lessons Lessons learned Rudbar Tabas

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Chemistry of Minerals and Geothermobarometry of Volcanic Rocks in the Region Located in Southeast of bam, Kerman Province

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Open Journal of Geology 2017年第11期7卷 1644-1653页

作者： Abdollah Yazdi Afshin Ashja-Ardalan Mohammad-Hashem Emami Rahim Dabiri Mohammad Foudazi Department of Geology North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Islamshahr Branch Islamic Azad University Tehran Iran Department of Geology Mashhad Branch Islamic Azad University Mashhad Iran

In this paper, tectonic and geothermobarometric environments have been studied with respect to the combination of pyroxene, olivine and plagioclase in volcanic rocks in the southeast of bam. The combination of volcanic rocks in the region consists of olivine basalt, basalt, alkaline basalt, andesite, trachyandesite and pyroxene andesite. This combination is the result of the processes of crystallization and sometimes contamination. Plagioclase, clinopyroxene, olivine, and amphibole constitute the major minerals (rock forming minerals) in these rocks. Porphyritic to mega-porphyritic textures with microlithic, glumero-porphyritic and amigdaluidal matrix are observed. Based on the thermometric calculations, plagioclase, pyroxene, and olivine minerals and the rocks of this region are crystallized at a pressure of 1.5 to 7 kb and temperatures ranging from about 700°C to 1250°C.

关键词： Plagioclase Pyroxene Geochemistry Thermo-Barometry Volcanic Rocks bam

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Economic Analysis of the Determinants of the Adoption of Water and Soil Conservation Techniques in Burkina Faso: Case of Cotton Producers in the Province of bam

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Journal of Environmental Protection 2019年第10期10卷 1213-1223页

作者： Dissani Badoubatoba Mathieu Sanmang Wu Goetswang Kealeboga Fredah School of Economics and Management China University of Geosciences Beijing China

Soil degradation is a major problem in the Sudano-Sahelian zone of Burkina Faso. To maintain or improve soil productivity levels and limit Water losses, especially with rainfall variability, adaptation strategies have been developed that focus on water and Soil Conservation techniques (WSC). Although their agronomic benefits have been proven, adoption rates for these techniques are generally low, particularly among cotton farmers in bam province. The main objective of this study is to identify the socioeconomic and institutional determinants of the adoption of WSC among cotton farmers in bam. The data used for our study were collected as part of the Semi-Arid Resilience Promotion Project (SARP) from cotton producers in the province. A probit model was used to analyze the factors that determine the adoption of WSC in bam cotton producers. The results show that variables such as early warning, group membership, smartphone ownership, and cotton income positively influence the likelihood of producers adopting WSC techniques. On the other hand, technical assistance and access to the pesticide have a negative influence on the adoption of WSC by bam cotton producers.

关键词： WSC Adoption Probit Cotton Climate Change bam

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Dynamic Analysis of Fractional-Order Fuzzy bam Neural Networks with Delays in the Leakage Terms

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Applied Mathematics 2017年第12期8卷 1808-1819页

作者： Pan Wang Jianwei Shen Applied Mathematics Xuchang University Xuchang China

In this paper, based on the theory of fractional-order calculus, we obtain some sufficient conditions for the uniform stability of fractional-order fuzzy bam neural networks with delays in the leakage terms. Moreover, the existence, uniqueness and stability of its equilibrium point are also proved. A numerical example is presented to demonstrate the validity and feasibility of the proposed results.

关键词： Fractional-Order Fuzzy bam Neural Networks Uniform Stability Delay Leakage Terms

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A Survey of Arsenic Level in Tube-Wells in bam Province (Burkina Faso)

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Journal of Environmental Protection 2014年第14期5卷 1406-1410页

作者： Touridomon Issa Somé Abdoul Karim Sakira Alidou Kaboré Aissata Traoré Laboratory of Toxicology Environment and Health Doctorate School of Health University of Ouagadougou Ouaga Burkina Faso Plan Burkina Ouagadougou Burkina Faso

Groundwater is a main source of water supply for populations in Burkina Faso where there is a serious problem for drinking water access. However, water quality has not been always followed regularly. Recent studies showed that more than 50% of drillings in Yatenga province (north of Burkina Faso) have an arsenic concentration above the recommended WHO requirement. Preliminaries studies conducted in bam (Center North of Burkina Faso) showed high arsenic level in certain localities. This work presents for the first time data on a large scale evaluation that had been performed in all the localities of bam province in other to have a better assessment of contamination scale. A total of 707 drilling water samples have been selected randomly in 9 communes and analysed for the arsenic level using atomic absorption spectrometry with hydride generation. The results showed that 11% of drillings have an arsenic concentration above the recommended WHO requirements with Rouko commune having the highest rate of high arsenic level (22%).

关键词： Arsenic Groundwater Contamination bam Province

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Existence and Stability Analysis of Fractional Order bam Neural Networks with a Time Delay

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Applied Mathematics 2015年第12期6卷 2057-2068页

作者： Yuping Cao Chuanzhi Bai Department of Basic Courses Lianyungang Technical College Lianyungang China Department of Mathematics Huaiyin Normal University Huaian China

Based on the theory of fractional calculus, the contraction mapping principle, Krasnoselskii fixed point theorem and the inequality technique, a class of Caputo fractional-order bam neural networks with delays in the leakage terms is investigated in this paper. Some new sufficient conditions are established to guarantee the existence and uniqueness of the nontrivial solution. Moreover, uniform stability of such networks is proposed in fixed time intervals. Finally, an illustrative example is also given to demonstrate the effectiveness of the obtained results.

关键词： bam Neural Networks Caputo Fractional-Order Existence Fixed Point Theorems Uniform Stability

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