Long-Term Preservation of Dendroarchaeological Specimens and In Situ Preservation: Problems and Practical Solutions

2017 ◽  
pp. 353-362
Keyword(s):  
In Situ Preservation ◽  
Long Term Preservation

scholarly journals In Situ Preservation Fraction of Parathyroid Gland in Thyroidectomy: A Cohort Retrospective Study

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Han Luo ◽  
Wanjun Zhao ◽  
Hongliu Yang ◽  
Anping Su ◽  
Bin Wang ◽  
...  
Keyword(s):  
Risk Factor ◽  
Parathyroid Gland ◽  
Independent Risk Factor ◽  
Common Symptom ◽  
Postoperative Hypocalcemia ◽  
In Situ Preservation ◽  
Postoperative Hypoparathyroidism ◽  
Transient Hypoparathyroidism

Background and Objectives. Parathyroid failure is the most common symptom after thyroidectomy. To prevent it, a gland was preserved in situ or an ischemic one was autotransplanted. This study explored the relationship between in situ preservation of the parathyroid gland and gland failure. Methods. Consecutive patients who underwent initial total thyroidectomy were enrolled retrospectively in a prospectively maintained database. Patients were divided into groups by parathyroid gland remaining in situ fraction (PGRIF) (PGRIF = number of in situ glands/(total number of identified glands − number of glands in specimen). Patients were graded by tertiles and followed at least one year after surgery. Results. 559 patients were included. PGRIF is significantly inversely associated with transient hypoparathyroidism, protracted hypoparathyroidism, and postoperative hypocalcemia. PGRIF was identified as an independent risk factor for transient hypoparathyroidism, protracted hypoparathyroidism, and postoperative hypocalcemia (OR=0.177, 0.190, and 0.330, resp.). Autotransplantation of parathyroid gland would not affect the calcium level in the long term. Conclusion. In situ preservation of parathyroid gland is crucial for parathyroid function. Less preserved is the independent risk factor for postoperative hypoparathyroidism and hypocalcemia, resulting in a worse function of parathyroid gland in the long term.

scholarly journals Extraction of underwater fragile artifacts: research status and prospect

2022 ◽  
Vol 10 (1) ◽  
Author(s):  
Xue-Qiang Chen ◽  
Ke Xia ◽  
Wenjing Hu ◽  
Ming Cao ◽  
Kai Deng ◽  
...  
Keyword(s):  
Controlled Environment ◽  
First Choice ◽  
Protective Strategy ◽  
Long Time ◽  
Archaeological Artifacts ◽  
Underwater Sites ◽  
Difficult Situations ◽  
Long Term Preservation

AbstractThere are still many difficulties in the recovery and long-term preservation of underwater archaeological artifacts, in situ preservation should be the first choice before further procedures are considered. However, the materials, preservation status, and preservation environment of underwater artifacts are diverse, resulting in many fragile artifacts facing difficult situations. In order to prevent serious damage, it is a safe protective strategy to preserve them in a controlled environment for a long time after excavation. Extraction and transfer of fragile cultural relics are vital parts of this strategy. Due to the complexity of the underwater environment and the vulnerability of fragile artifacts, safety in extraction and transfer still faces enormous challenges. Researchers have developed new materials and technologies to tackle this problem. This paper focuses on introducing and developing prospects to different preservation techniques for fragile artifacts from underwater sites.

Problems of treatment of primary openangle glaucoma in combination with thrombosis of the central retinal vein

GlaucomaNews ◽  
2020 ◽  
pp. 65-69
Author(s):  
T.E. Lipatkina ◽  
◽  
Е.V. Karlova ◽  
A.V. Zolotarev ◽  
◽  
...  
Keyword(s):  
Macular Edema ◽  
Primary Open Angle Glaucoma ◽  
Antihypertensive Drugs ◽  
Open Angle Glaucoma ◽  
Vascular Wall ◽  
Open Angle ◽  
Retinal Edema ◽  
Long Term Preservation ◽  
Central Retinal Vein

Patients with primary open-angle glaucoma (POAG) and ophthalmic hypertension have an increased likelihood of developing occlusions (thrombosis) of the central retinal vein. Different groups of antihypertensive drugs differ in their mechanism of action and may affect concomitant ocular pathology, in particular, retinal edema, which occurs, for example, in occlusion of the central retinal vein. Used in most patients with glaucoma, prostaglandin analogs can contribute to the long-term preservation of macular edema due to the effect on the permeability of the vascular wall. Preparations of other pharmacological groups, reducing the production of aqueous humor, on the contrary, may contribute to its regression. Therefore, the question of choosing a drug for antihypertensive therapy in patients with primary open-angle glaucoma and concomitant macular edema is relevant and is for further study.

Comparison of Polarized and Depolarized Arrest in the Isolated Rat Heart for Long-term Preservation

Circulation ◽  
1997 ◽  
Vol 96 (9) ◽  
pp. 3148-3156 ◽  
Author(s):  
A. K. Snabaitis ◽  
M. J. Shattock ◽  
D. J. Chambers
Keyword(s):  
Rat Heart ◽  
Isolated Rat Heart ◽  
Long Term Preservation ◽  
Isolated Rat

Online Publication of Monuments

2020 ◽  
pp. 355-369
Author(s):  
Willeke Wendrich
Keyword(s):  
Peer Review ◽  
3D Modeling ◽  
Online Publication ◽  
New Technologies ◽  
3D Scanning ◽  
Architectural Drawings ◽  
3D Gis ◽  
Unity 3D ◽  
Long Term Preservation

This chapter outlines the advantages of digital epigraphy in the context of the original monuments. It analyzes the perception of epigraphic publication of monuments, taking into account new technologies. 3DVR models can be created using architectural drawings and measurements (CAD and 3D modeling), 3D scanning, and Structure for Motion (SfM). These systems present different advantages and challenges, which are discussed. Current options for publication include VSim, 3D GIS, and Unity 3D platforms. The issues of peer review of publications and long-term preservation of data are addressed. The chapter concludes with a consideration of the issue of potentially misleading impressions given by 3DVR representations.

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