Tài liệu miễn phí Sinh học

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Vỏ trứng gia cầm và những công dụng

Bài viết tiến hành tìm hiểu cấu tạo vỏ trứng gia cầm, dùng vỏ trứng để chữa các bệnh trên người, vai trò của vỏ trứng, vỏ trứng với một số công dụng khác.

12/29/2020 9:01:27 PM +00:00

Ideonella sakaiensis - loại vi khuẩn mới và công nghệ sinh học xử lý chất thải nhựa polyethylene terephthalate

Bài viết tiến hành nghiên cứu và tổng hợp Polyethylene terephthalate, Thuộc tính và ứng dụng của Polyethylene terephthalate, công nghệ sinh học xử lý chất thải nhựa. Mời các bạn cùng tham khảo bài viết để nắm chi tiết hơn nội dung nghiên cứu.

12/29/2020 9:01:13 PM +00:00

Gen chịu mặn và nông nghiệp nước muối

Bài viết này tiến hành tìm hiểu về gen chịu mặn; tìm kiếm gen chịu mặn từ cây hoang dã; nông nghiệp nước muối. Từ các kết quả nghiên cứu này để phát triển hệ gen mới ứng dụng vào nông nghiệp Việt Nam hiện nay. Mời các bạn cùng tham khảo bài viết để nắm chi tiết hơn nội dung nghiên cứu.

12/29/2020 9:00:16 PM +00:00

Công nghệ sản xuất Omega-3

Bài viết này tiến hành tìm hiểu về axit béo omega-3; nguồn thu nhận omega-3; sản xuất omega-3 trong công nghệ sinh học ứng dụng cho chế tạo các loại thuốc phục vụ cho ngành y tế Việt Nam hiện nay.

12/29/2020 8:59:54 PM +00:00

Đặc điểm và phân bố chi sa nhân ở Nghệ An

Bài viết này là kết quả nghiên cứu, đánh giá về chi Sa nhân phân bố ở Nghệ An làm cơ sở khoa học cho công tác khai thác và bảo tồn.

12/29/2020 8:59:47 PM +00:00

Sirolimus hợp chất tự nhiên làm chậm lão hóa

Bài viết tiến hành nghiên cứu về Sirolimus hợp chất tự nhiên làm chậm lão hóa, cấu tạo phân tử và tác dụng của Sirolimus, sản xuất Sirolimus trong công nghệ sinh học.

12/29/2020 8:59:27 PM +00:00

Tuyển chọn và khảo sát điều kiện nuôi cấy vi khuẩn kỵ khí có khả năng thủy phân rơm

Mục tiêu nghiên cứu của bài viết là tuyển chọn được dòng vi khuẩn phân lập từ dạ cỏ bò có khả năng thủy phân rơm hiệu quả cao; những yếu tố ảnh hưởng đến sinh trưởng của vi khuẩn và khả năng thủy phân rơm đều được tiến hành nghiên cứu.

12/29/2020 8:23:29 PM +00:00

Development of the follicular basement membrane during human gametogenesis and early folliculogenesis

In society, there is a clear need to improve the success rate of techniques to restore fertility. Therefore a deeper knowledge of the dynamics of the complex molecular environment that regulates human gametogenesis and (early) folliculogenesis in vivo is necessary.

12/29/2020 6:28:30 PM +00:00

Epigenetic regulation of histone modifications and Gata6 gene expression induced by maternal diet in mouse embryoid bodies in a model of developmental programming

Dietary interventions during pregnancy alter offspring fitness. We have shown mouse maternal low protein diet fed exclusively for the preimplantation period (Emb-LPD) before return to normal protein diet (NPD) for the rest of gestation, is sufficient to cause adult offspring cardiovascular and metabolic disease.

12/29/2020 6:28:24 PM +00:00

Bioelectric patterning during oogenesis: Stage-specific distribution of membrane potentials, intracellular pH and ion-transport mechanisms in Drosophila ovarian follicles

Bioelectric phenomena have been found to exert influence on various developmental and regenerative processes. Little is known about their possible functions and the cellular mechanisms by which they might act during Drosophila oogenesis.

12/29/2020 6:28:16 PM +00:00

Denervation impairs regeneration of amputated zebrafish fins

Zebrafish are able to regenerate many of its tissues and organs after damage. In amphibians this process is regulated by nerve fibres present at the site of injury, which have been proposed to release factors into the amputated limbs/fins, promoting and sustaining the proliferation of blastemal cells.

12/29/2020 6:28:04 PM +00:00

Improved application of the electrophoretic tissue clearing technology, CLARITY, to intact solid organs including brain, pancreas, liver, kidney, lung, and intestine

Mapping of tissue structure at the cellular, circuit, and organ-wide scale is important for understanding physiological and biological functions. A bio-electrochemical technique known as CLARITY used for three-dimensional anatomical and phenotypical mapping within transparent intact tissues has been recently developed.

12/29/2020 6:27:55 PM +00:00

The role of Sox9 in mouse mammary gland development and maintenance of mammary stem and luminal progenitor cells

Identification and characterization of molecular controls that regulate mammary stem and progenitor cell homeostasis are critical to our understanding of normal mammary gland development and its pathology.

12/29/2020 6:27:48 PM +00:00

Isoform-specific functions of Mud/NuMA mediate binucleation of Drosophila male accessory gland cells

: In standard cell division, the cells undergo karyokinesis and then cytokinesis. Some cells, however, such as cardiomyocytes and hepatocytes, can produce binucleate cells by going through mitosis without cytokinesis. T

12/29/2020 6:27:37 PM +00:00

Generation of cell type-specific monoclonal antibodies for the planarian and optimization of sample processing for immunolabeling

Efforts to elucidate the cellular and molecular mechanisms of regeneration have required the application of methods to detect specific cell types and tissues in a growing cohort of experimental animal models. For example, in the planarian Schmidtea mediterranea, substantial improvements to nucleic acid hybridization and electron microscopy protocols have facilitated the visualization of regenerative events at the cellular level.

12/29/2020 6:27:25 PM +00:00

Mechanistic target of rapamycin complex 1 signaling regulates cell proliferation, cell survival, and differentiation in regenerating zebrafish fins

The mechanistic target of rapamycin complex1 (mTORC1) signaling pathway has been implicated in functions of multicellular processes, including cell growth and metabolism. Although recent reports showed that many signaling pathways, including Activin, Bmp, Fgf, sonic hedgehog, Insulin-like growth factor (IGF), Notch, retinoic acid, and Wnt, are implicated in non-mammalian vertebrate regeneration, also known as epimorphic regeneration, mTORC1 function remains unknown.

12/29/2020 6:27:16 PM +00:00

Expression of maternally derived KHDC3, NLRP5, OOEP and TLE6 is associated with oocyte developmental competence in the ovine species

The sub-cortical maternal complex (SCMC), located in the subcortex of mouse oocytes and preimplantation embryos, is composed of at least four proteins encoded by maternal effect genes: OOEP, NLRP5/ MATER, TLE6 and KHDC3/FILIA.

12/29/2020 6:27:08 PM +00:00

DNAJB13, a type II HSP40 family member, localizes to the spermatids and spermatozoa during mouse spermatogenesis

Hundreds of HSP40s derived from various species have been identified, of which several proteins are involved in spermatogenesis. DNAJB13 is a type II HSP40/DnaJ protein. In a previous study, we cloned mouse Dnajb13, which is up-regulated in cryptorchidism.

12/29/2020 6:27:01 PM +00:00

Vascularization of primary and secondary ossification centres in the human growth plate

The switch from cartilage template to bone during endochondral ossification of the growth plate requires a dynamic and close interaction between cartilage and the developing vasculature. Vascular invasion of the primarily avascular hypertrophic chondrocyte zone brings chondroclasts, osteoblast- and endothelial precursor cells into future centres of ossification.

12/29/2020 6:26:53 PM +00:00

A self-avoidance mechanism in patterning of the urinary collecting duct tree

Glandular organs require the development of a correctly patterned epithelial tree. These arise by iterative branching: early branches have a stereotyped anatomy, while subsequent branching is more flexible, branches spacing out to avoid entanglement.

12/29/2020 6:26:46 PM +00:00

Tc-knirps plays different roles in the specification of antennal and mandibular parasegment boundaries and is regulated by a pair-rule gene in the beetle Tribolium castaneum

The Drosophila larval head is evolutionarily derived at the genetic and morphological level. In the beetle Tribolium castaneum, development of the larval head more closely resembles the ancestral arthropod condition.

12/29/2020 6:26:30 PM +00:00

Evolution of Hox gene clusters in deuterostomes

Hox genes, with their similar roles in animals as evolutionarily distant as humans and flies, have fascinated biologists since their discovery nearly 30 years ago. During the last two decades, reports on Hox genes from a still growing number of eumetazoan species have increased our knowledge on the Hox gene contents of a wide range of animal groups.

12/29/2020 6:26:22 PM +00:00

Integrated proteomic and transcriptomic analysis of the Aedes aegypti eggshell

Mosquito eggshells show remarkable diversity in physical properties and structure consistent with adaptations to the wide variety of environments exploited by these insects. We applied proteomic, transcriptomic, and hybridization in situ techniques to identify gene products and pathways that participate in the assembly of the Aedes aegypti eggshell.

12/29/2020 6:26:15 PM +00:00

Expression of phosphatase of regenerating liver family genes during embryogenesis: An evolutionary developmental analysis among Drosophila, amphioxus, and zebrafish

Phosphatase of regenerating liver (PRL) family is classified as class IVa of protein tyrosine phosphatase (PTP4A) that removes phosphate groups from phosphorylated tyrosine residues on proteins. PRL phosphatases have been implicated in a number of tumorigenesis and metastasis processes and are highly conserved.

12/29/2020 6:26:05 PM +00:00

Regulation of multiple tip formation by caffeine in cellular slime molds

The multicellular slug in Dictyostelium has a single tip that acts as an organising centre patterning the rest of the slug. High adenosine levels at the tip are believed to be responsible for this tip dominance and the adenosine antagonist, caffeine overrides this dominance promoting multiple tip formation.

12/29/2020 6:25:57 PM +00:00

A detailed staging scheme for late larval development in Strongylocentrotus purpuratus focused on readily-visible juvenile structures within the rudiment

The purple sea urchin, Strongylocentrotus purpuratus, has long been the focus of developmental and ecological studies, and its recently-sequenced genome has spawned a diversity of functional genomics approaches. S. purpuratus has an indirect developmental mode with a pluteus larva that transforms after 1–3 months in the plankton into a juvenile urchin.

12/29/2020 6:25:50 PM +00:00

A vertebrate-conserved cis-regulatory module for targeted expression in the main hypothalamic regulatory region for the stress response

The homeodomain transcription factor orthopedia (Otp) is an evolutionarily conserved regulator of neuronal fates. In vertebrates, Otp is necessary for the proper development of different regions of the brain and is required in the diencephalon to specify several hypothalamic cell types, including the cells that control the stress response.

12/29/2020 6:25:42 PM +00:00

TGF-β signaling can act from multiple tissues to regulate C. elegans body size

Regulation of organ and body size is a fundamental biological phenomenon, requiring tight coordination between multiple tissues to ensure accurate proportional growth. In C. elegans, a TGF-β pathway is the major regulator of body size and also plays a role in the development of the male tail, and is thus referred to as the TGF-β/Sma/Mab (for small and male abnormal) pathway.

12/29/2020 6:25:34 PM +00:00

Perturbing the developing skull: Using laser ablation to investigate the robustness of the infraorbital bones in zebrafish (Danio rerio)

The development of the craniofacial skeleton from embryonic mesenchyme is a complex process that is not yet completely understood, particularly for intramembranous bones. This study investigates the development of the neural crest derived infraorbital (IO) bones of the zebrafish (Danio rerio) skull.

12/29/2020 6:25:25 PM +00:00

Proteomic analysis of fibroblastema formation in regenerating hind limbs of Xenopus laevis froglets and comparison to axolotl

To gain insight into what differences might restrict the capacity for limb regeneration in Xenopus froglets, we used High Performance Liquid Chromatography (HPLC)/double mass spectrometry to characterize protein expression during fibroblastema formation in the amputated froglet hindlimb, and compared the results to those obtained previously for blastema formation in the axolotl limb.

12/29/2020 6:25:18 PM +00:00