Tài liệu miễn phí Sinh học

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Assessing the suitability of bio climate conditions of Phu Tho province for the growth and distribution of tea

In this article, by analyzing bio-climatic characteristics of Phu Tho Province and comparing tea plant eco-biological requirements, the adaptability assessment of bioclimatic conditions of Phu Tho has been made.

12/29/2020 5:56:52 PM +00:00

The haching capacity of bovine embryos obtained from different quality embryos, different sources of oocytes and cultured after thawing out frozen

In this research, we have compared the growing capacity after thawing out frozen embryos which had different qualities and were formed from different source of oocytes. The results show that, the embryos which have standard forms, embryonic cells connected closely, without or few seperated cells or crushed pieces outside would have high growing capacity of frozen embryos after thawing out.

12/29/2020 5:56:39 PM +00:00

Composition and distribution of earthworms in Khe Ro natural reserve

This research aims to discover species components and distributive features of earthworms, contributing to investigatations and reserve biological diversification at Khe Ro Nature Reserve.

12/29/2020 5:56:27 PM +00:00

Study on the efficacy of four probiotic bacteria strains on piglets

This study was conducted to study the production and evaluation of potentially probiotic additives containing three live lactic bacteria culture broths, which could be used as a replacement for antibiotics in weaning and post-weaning piglets in Vietnam.

12/29/2020 5:56:09 PM +00:00

The existence of solution and optimal control problems for the Klein-Gordon hemivariational inequality with strongly elliptic operator

In this paper, we study the optimal control problems of systems governed by Klein-Gordon hemivariational inequalities. We establish the existence of solutions and the optimal control to these problems.

12/29/2020 5:54:28 PM +00:00

LabPipe: An extensible bioinformatics toolkit to manage experimental data and metadata

Data handling in clinical bioinformatics is often inadequate. No freely available tools provide straightforward approaches for consistent, fexible metadata collection and linkage of related experimental data generated locally by vendor software.

12/29/2020 5:38:05 PM +00:00

A distance based multisample test for high-dimensional compositional data with applications to the human microbiome

Compositional data refer to the data that lie on a simplex, which are common in many scientific domains such as genomics, geology and economics. As the components in a composition must sum to one, traditional tests based on unconstrained data become inappropriate, and new statistical methods are needed to analyze this special type of data.

12/29/2020 5:37:58 PM +00:00

Improving biomedical named entity recognition with syntactic information

Biomedical named entity recognition (BioNER) is an important task for understanding biomedical texts, which can be challenging due to the lack of large-scale labeled training data and domain knowledge. To address the challenge, in addition to using powerful encoders (e.g., biLSTM and BioBERT), one possible method is to leverage extra knowledge that is easy to obtain.

12/29/2020 5:37:50 PM +00:00

Performance analysis of novel methods for detecting epistasis

Epistasis is recognized fundamentally important for understanding the mechanism of disease-causing genetic variation. Though many novel methods for detecting epistasis have been proposed, few studies focus on their comparison.

12/29/2020 5:37:43 PM +00:00

Expression patterns of ciliopathy genes ARL3 and CEP120 reveal roles in multisystem development

Joubert syndrome and related disorders (JSRD) and Jeune syndrome are multisystem ciliopathy disorders with overlapping phenotypes. There are a growing number of genetic causes for these rare syndromes, including the recently described genes ARL3 and CEP120.

12/29/2020 5:37:36 PM +00:00

Transcriptomic profiles of non-embryogenic and embryogenic callus cells in a highly regenerative upland cotton line (Gossypium hirsutum L.)

Genotype independent transformation and whole plant regeneration through somatic embryogenesis relies heavily on the intrinsic ability of a genotype to regenerate. The critical genetic architecture of non-embryogenic callus (NEC) cells and embryogenic callus (EC) cells in a highly regenerable cotton genotype is unknown.

12/29/2020 5:37:29 PM +00:00

Depletion of SNRNP200 inhibits the osteo −/dentinogenic differentiation and cell proliferation potential of stem cells from the apical papilla

Tissue regeneration mediated by mesenchymal stem cells (MSCs) is deemed a desirable way to repair teeth and craniomaxillofacial tissue defects. Nevertheless, the molecular mechanisms about cell proliferation and committed differentiation of MSCs remain obscure.

12/29/2020 5:37:22 PM +00:00

Label-free quantitative proteomic analysis of insect larval and metamorphic molts

Molting is an essential biological process occurring characteristic times throughout the life cycle of holometabolous insects. However, it is not clear how insects determine the direction of molting to remain status quo or to initiate metamorphosis.

12/29/2020 5:37:15 PM +00:00

Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus)

Organismal fitness can be determined at early life-stages, but phenotypic variation at early life-stages is rarely considered in studies on evolutionary diversification. The trophic apparatus has been shown to contribute to sympatric resource-mediated divergence in several taxa.

12/29/2020 5:37:08 PM +00:00

Monocyte Chemoattractant Protein-1 stimulates the differentiation of rat stem and progenitor Leydig cells during regeneration

Monocyte chemoattractant protein-1(MCP-1) is a chemokine secreted by Leydig cells and peritubular myoid cells in the rat testis. Its role in regulating the development of Leydig cells via autocrine and paracrine is still unclear. The objective of the current study was to investigate the effects of MCP-1 on Leydig cell regeneration from stem cells in vivo and on Leydig cell development in vitro.

12/29/2020 5:36:59 PM +00:00

Transgenic and knockout analyses of Masculinizer and doublesex illuminated the unique functions of doublesex in germ cell sexual development of the silkworm, Bombyx mori

Masculinizer (Masc) plays a pivotal role in male sex determination in the silkworm, Bombyx mori. Masc is required for male-specific splicing of B. mori doublesex (Bmdsx) transcripts. The male isoform of Bmdsx (BmdsxM) induces male differentiation in somatic cells, while females express the female isoform of Bmdsx (BmdsxF), which promotes female differentiation in somatic cells.

12/29/2020 5:36:51 PM +00:00

Early shell field morphogenesis of a patellogastropod mollusk predominantly relies on cell movement and F-actin dynamics

The morphogenesis of the shell field is an essential step of molluscan shell formation, which exhibits both conserved features and interlineage variations. As one major gastropod lineage, the patellogastropods show different characters in its shell field morphogenesis compared to other gastropods (e.g., the pulmonate gastropod Lymnaea stagnalis), likely related to its epibolic gastrulation.

12/29/2020 5:36:44 PM +00:00

Neural defects caused by total and Wnt1- Cre mediated ablation of p120ctn in mice

Outside these junctions, p120ctn is actively involved in the regulation of small GTPases of the Rho family, in actomyosin dynamics and in transcription regulation. We and others reported that loss of p120ctn in mouse embryos results in an embryonic lethal phenotype, but the exact developmental role of p120ctn during brain formation has not been reported.

12/29/2020 5:36:31 PM +00:00

Evolutionary and developmental considerations of the diet and gut morphology in ceratophryid tadpoles (Anura)

Before metamorphosis, almost all anuran tadpoles are omnivores. Larval carnivory occurs in some species and, it is associated with distinctive morphotypes. Obligatory carnivorous tadpoles exhibit structural changes in the gastrointestinal tract compared to larvae that are predominately omnivores.

12/29/2020 5:36:23 PM +00:00

Analysing bioelectrical phenomena in the Drosophila ovary with genetic tools: Tissuespecific expression of sensors for membrane potential and intracellular pH, and RNAi-knockdown of mechanisms involved in ion exchange

Changes in transcellular bioelectrical patterns are known to play important roles during developmental and regenerative processes. The Drosophila follicular epithelium has proven to be an appropriate model system for studying the mechanisms by which bioelectrical signals emerge and act.

12/29/2020 5:36:12 PM +00:00

Identification of vital candidate microRNA/ mRNA pairs regulating ovule development using high-throughput sequencing in hazel

Hazels (Corylus spp.) are economically important nut-producing species in which ovule development determines seed plumpness, one of the key parameters reflecting nut quality. microRNAs (miRNAs) play important roles in RNA silencing and the post-transcriptional regulation of gene expression.

12/29/2020 5:36:03 PM +00:00

Multiple functions of the scaffold protein Discs large 5 in the control of growth, cell polarity and cell adhesion in Drosophila melanogaster

Scaffold proteins support a variety of key processes during animal development. Mutant mouse for the MAGUK protein Discs large 5 (Dlg5) presents a general growth impairment and moderate morphogenetic defects.

12/29/2020 5:35:41 PM +00:00

Wingless and Archipelago, a fly E3 ubiquitin ligase and a homolog of human tumor suppressor FBW7, show an antagonistic relationship in wing development

Archipelago (Ago) is a Drosophila homolog of mammalian F-box and WD repeat domain-containing 7 (FBW7, also known as FBXW7). In previous studies, FBW7 has been addressed as a tumor suppressor mediating ubiquitin-dependent proteolysis of several oncogenic proteins. Ubiquitination is a type of protein modification that directs protein for degradation as well as sorting.

12/29/2020 5:35:33 PM +00:00

Notch signaling in mouse blastocyst development and hatching

Mammalian early embryo development requires a well-orchestrated interplay of cell signaling pathways. Notch is a major regulatory pathway involved in cell-fate determination in embryonic and adult scenarios. However, the role of Notch in embryonic pre-implantation development is controversial.

12/29/2020 5:35:24 PM +00:00

Butterfly eyespot color pattern formation requires physical contact of the pupal wing epithelium with extracellular materials for morphogenic signal propagation

Eyespot color pattern formation on butterfly wings is sensitive to physical damage and physical distortion as well as physical contact with materials on the surface of wing epithelial tissue at the pupal stage. Contact-mediated eyespot color pattern changes may imply a developmental role of the extracellular matrix in morphogenic signal propagation.

12/29/2020 5:35:13 PM +00:00

Bioelectrical and cytoskeletal patterns correlate with altered axial polarity in the follicular epithelium of the Drosophila mutant gurken

Bioelectrical signals are known to be involved in the generation of cell and tissue polarity as well as in cytoskeletal dynamics. The epithelium of Drosophila ovarian follicles is a suitable model system for studying connections between electrochemical gradients, patterns of cytoskeletal elements and axial polarity.

12/29/2020 5:35:05 PM +00:00

Long-term expansion, genomic stability and in vivo safety of adult human pancreas organoids

Pancreatic organoid systems have recently been described for the in vitro culture of pancreatic ductal cells from mouse and human. Mouse pancreatic organoids exhibit unlimited expansion potential, while previously reported human pancreas organoid (hPO) cultures do not expand efficiently long-term in a chemically defined, serum-free medium.

12/29/2020 5:34:50 PM +00:00

Expression analysis of Rab11 during zebrafish embryonic development

Rab proteins are GTPases responsible for intracellular vesicular trafficking regulation. Rab11 proteins, members of the Rab GTPase family, are known to regulate vesicular recycling during embryonic development. In zebrafish, there are 3 rab11 paralogues, known as rab11a, rab11ba and rab11bb, sharing high identity with each other.

12/29/2020 5:34:43 PM +00:00

Downregulation of lncRNA DANCR promotes osteogenic differentiation of periodontal ligament stem cells

Long non-coding RNAs (lncRNAs) have been widely known to have an appreciable effect in physiology and pathology. In tooth regeneration, periodontal ligament stem cells (PDLSCs) are regarded as a key effector, whereas, how lncRNA acts in the osteogenic differentiation of PDLSCs have not been completely understood.

12/29/2020 5:34:36 PM +00:00

Comparison of the transcriptomes of two tardigrades with different hatching coordination

Tardigrades are microscopic organisms, famous for their tolerance against extreme environments. The establishment of rearing systems of multiple species has allowed for comparison of tardigrade physiology, in particular in embryogenesis.

12/29/2020 5:34:29 PM +00:00