keyword
MENU ▼
Read by QxMD icon Read
search

Freezing

keyword
https://www.readbyqxmd.com/read/29786843/effect-of-canning-and-freezing-on-the-nutritional-content-of-apricots
#1
Erin Claire Adkison, William B Biasi, Veronique Bikoba, Dirk M Holstege, Elizabeth J Mitcham
The effect of commercial canning and freezing on the nutritional content of fresh apricots was investigated. Processed samples were analyzed post-processing and after 3 months of storage and compared directly to fresh apricots from the same source. Vitamin C, beta-carotene, total phenols, and antioxidants were quantified. Compared to fresh, canned apricots initially exhibited similar levels of antioxidants, a 17% increase in beta-carotene, and a 48% increase in phenols, while vitamin C was reduced by 37%. After 3 months of storage, antioxidant levels were 47% higher than fresh...
May 22, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29784346/speciation-of-organic-inorganic-mercury-and-total-mercury-in-blood-samples-using-vortex-assisted-dispersive-liquid-liquid-microextraction-based-on-the-freezing-of-deep-eutectic-solvent-followed-by-gfaas
#2
Reza Akramipour, Mohammad Reza Golpayegani, Simin Gheini, Nazir Fattahi
In this research, a new vortex assisted dispersive liquid-liquid microextraction based on the freezing of deep eutectic solvent (VADLLME-FDES) has been developed for the determination of organic mercury (R-Hg) and inorganic mercury (Hg2+ ) in blood samples prior to their analysis by graphite furnace atomic absorption spectrometry (GFAAS). In this method, a green solvent consisting of 1-octyl-3-methylimidazolium chloride and 1-undecanol was used as an extraction solvent, yielding the advantages of material stability, low density, and a suitable freezing point near room temperature...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29784299/effect-of-food-additives-on-egg-yolk-gelation-induced-by-freezing
#3
Monica Primacella, Tao Fei, Nuria Acevedo, Tong Wang
This study demonstrates technological advances in preventing yolk gelation during freezing and thawing. Gelation negatively affects yolk functionality in food formulation. Preventing gelation using 10% salt or sugar limits the application of the yolk. Novel food additives were tested to prevent gelation induced by freezing. Significant reduction (p < 0.05) in gel hardness of frozen-thawed yolk (45 h freezing at -20 °C) indicates that hydrolyzed carboxymethyl cellulose (HCMC), proline, and hydrolyzed egg white and yolk (HEW and HEY) are effective gelation inhibitors...
October 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29783783/the-microencapsulation-of-maqui-aristotelia-chilensis-mol-stuntz-juice-by-spray-drying-and-freeze-drying-produces-powders-with-similar-anthocyanin-stability-and-bioaccessibility
#4
Carolina Fredes, Camila Becerra, Javier Parada, Paz Robert
The microencapsulation of maqui juice by spray-drying and freeze-drying was studied as a strategy to protect anthocyanins in new food formulations in order to improve the anthocyanin retention before consumption and the bioaccessibility. It is well known that the encapsulation method affects both the shape and size of powders, being assumed that undefined forms of freeze-drying powders might affect their stability due to the high permeability to oxygen. The objective of this study was to compare the microencapsulation of maqui juice by spray-drying and freeze-drying, evaluating the stability of specific anthocyanins in yogurt and after in vitro digestion...
May 20, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29783162/a-peripheral-immune-response-to-remembering-trauma-contributes-to-the-maintenance-of-fear-memory-in-mice
#5
Matthew B Young, Leonard L Howell, Lauren Hopkins, Cassandra Moshfegh, Zhe Yu, Lauren Clubb, Jessica Seidenberg, Jeanie Park, Adam P Swiercz, Paul J Marvar
Alterations in peripheral immune markers are observed in individuals with post-traumatic stress disorder (PTSD). PTSD is characterized in part by impaired extinction of fear memory for a traumatic experience. We hypothesized that fear memory extinction is regulated by immune signaling stimulated when fear memory is retrieved. The relationship between fear memory and the peripheral immune response was tested using auditory Pavlovian fear conditioning in mice. Memory for the association was quantified by the amount of conditioned freezing exhibited in response to the conditioned stimulus (CS), extinction and time-dependent changes in circulating inflammatory cytokines...
May 17, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29783089/self-stabilized-silk-sericin-based-nanoparticles-in-vivo-biocompatibility-and-reduced-doxorubicin-induced-toxicity
#6
Doudou Hu, Ting Li, Zongpu Xu, Di Liu, Mingying Yang, Liangjun Zhu
A variety of colloid stabilizers and cryoprotectants confer improved nanoparticle (NP) colloidal stability and redisperability. However, the discounted tumor targetability, delivery efficacy and possible side effects limit the application in the vascular delivery of NPs. Here we present the water-soluble silk sericin (SS) not only as a material for the preparation of NPs, but also both a dispersion stabilizer and a cryoprotectant. In the absence of any stabilizers, SS-based NPs (SSC@NPs) could resist to the serum protein adsorption, preventing the formation of particle agglomerates...
May 18, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29782987/chitin-silk-fibroin-tio-2-bio-nanocomposite-as-a-biocompatible-wound-dressing-bandage-with-strong-antimicrobial-activity
#7
Mojtaba Ghanbari Mehrabani, Ramin Karimian, Rasul Rakhshaei, Farzaneh Pakdel, Hosein Eslami, Vahid Fakhrzadeh, Mahdi Rahimi, Roya Salehi, Hossein Samadi Kafil
Interconnected microporous biodegradable and biocompatible chitin/silk fibroin/TiO2 nanocomposite wound dressing with high antibacterial, blood clotting and mechanical strength properties were synthesized using freeze-drying method. The prepared nanocomposite dressings were characterized using SEM, FTIR, and XRD analysis. The prepared nanocomposite dressings showed high porosity above 90% with well-defined interconnected porous construction. Swelling and water uptake of the dressing were 93%, which is great for wound dressing applications...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29782945/advances-in-the-slow-freezing-cryopreservation-of-microencapsulated-cells
#8
REVIEW
H Gurruchaga, L Saenz Del Burgo, R M Hernandez, G Orive, C Selden, B Fuller, J Ciriza, J L Pedraz
Over the past few decades, the use of cell microencapsulation technology has been promoted for a wide range of applications as sustained drug delivery systems or as cells containing biosystems for regenerative medicine. However, difficulty in their preservation and storage has limited their availability to healthcare centers. Because the preservation in cryogenic temperatures poses many biological and biophysical challenges and that the technology has not been well understood, the slow cooling cryopreservation, which is the most used technique worldwide, has not given full measure of its full potential application yet...
May 18, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29782139/obstetric-outcomes-after-fresh-versus-frozen-thawed-embryo-transfers-a-systematic-review-and-meta-analysis
#9
Matheus Roque, Marcello Valle, Marcos Sampaio, Selmo Geber
OBJECTIVE: To evaluate if there are differences in the risks of obstetric outcomes in IVF/ICSI singleton pregnancies when compared fresh to frozen-thawed embryo transfers (FET). METHODS: This was a systematic review and meta-analysis evaluating the obstetric outcomes in singleton pregnancies after FET and fresh embryo transfer. The outcomes included in this study were pregnancy-induced hypertension (PIH), pre-eclampsia, placenta previa, and placenta accreta. RESULTS: The search yielded 654 papers, 6 of which met the inclusion criteria and reported on obstetric outcomes...
May 21, 2018: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/29781931/ultrasound-assessment-of-ice-ball-formation-by-cryoneurolysis-device-in-an-ex-vivo-model
#10
Adrian Kastler, Hannes Gruber, Elke Gizewski, Alexander Loizides
BACKGROUND AND OBJECTIVES: Real-time ice-ball formation during cryoneurolysis has sparsely been assessed with ultrasound (US). Cryoneurolysis in lower back pain syndrome represents a validated management option in cases of facet joint syndrome. Ultrasound may be a useful tool to perform facet joint cryodenervation. The objective of this study was to assess, ex vivo, the ability of US to assess the ice-ball formation of a cryoneurolysis device. METHODS: Ultrasound assessment of the ice-ball depiction was done using chicken muscle at 22°C in which several freezing cycles were performed with both 2...
May 17, 2018: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29781745/using-dextran-of-different-molecular-weights-to-achieve-faster-freeze-drying-and-improved-storage-stability-of-lactate-dehydrogenase
#11
Bjarke Strøm Larsen, Jeppe Skytte, Anna J Svagan, Helena Meng-Lund, Holger Grohganz, Korbinian Löbmann
Freeze-drying of protein formulations is frequently used to maintain protein activity during storage. The freeze-drying process usually requires long primary drying times because the highest acceptable drying temperature to obtain acceptable products is dependent on the glass transition temperature of the maximally freeze-concentrated solution (Tg '). On the other hand, retaining protein activity during storage is related to the glass transition temperature (Tg ) of the final freeze-dried product. In this study, dextrans with different molecular weight (1 kDa and 40 kDa) and mixtures thereof at the ratio 3:1, 1:1 and 1:3 (w/w) were used as cryo-/lyoprotectant and their impact on the stability of the model protein lactate dehydrogenase (LDH) was investigated at elevated temperatures (40 and 60°C)...
May 21, 2018: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/29781016/comparative-analysis-of-the-cellular-entry-of-polystyrene-and-gold-nanoparticles-using-the-freeze-concentration-method
#12
Sana Ahmed, Koyo Okuma, Kazuaki Matsumura
Despite advances in nanoparticle delivery, established physical approaches, such as electroporation and sonication, result in cell damage, limiting their practical applications. In this study, we proposed a unique freeze concentration-based technique and evaluated the efficacy of the method using two types of nanoparticles: citrate-capped gold nanoparticles and carboxylated polystyrene nanoparticles. We further compared the internalisation behaviour of particles of various sizes with and without freezing. Confocal microscopic images showed that the uptake efficacy of 50 nm nanomaterials was greater than that of 100 nm particles...
May 21, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29780544/the-enhancement-and-suppression-of-immersion-mode-heterogeneous-ice-nucleation-by-solutes
#13
Thomas F Whale, Mark A Holden, Theodore W Wilson, Daniel O'Sullivan, Benjamin J Murray
Heterogeneous nucleation of ice from aqueous solutions is an important yet poorly understood process in multiple fields, not least the atmospheric sciences where it impacts the formation and properties of clouds. In the atmosphere ice-nucleating particles are usually, if not always, mixed with soluble material. However, the impact of this soluble material on ice nucleation is poorly understood. In the atmospheric community the current paradigm for freezing under mixed phase cloud conditions is that dilute solutions will not influence heterogeneous freezing...
May 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29779692/development-and-validation-of-an-uhplc-hrms-ms-assay-for-nine-toxic-alkaloids-from-endophyte-infected-pasture-grasses-in-horse-serum
#14
Wiebke Rudolph, Daniela Remane, Dirk K Wissenbach, Frank T Peters
Endophyte fungi (e.g. Epichloë ssp. and Neotyphodium ssp.) in symbiosis with pasture grasses (e.g. Festuca arundinacaea and Lolium perenne) can produce toxic alkaloids, which are suspected to be involved in equine diseases such as fescue toxicosis, ryegrass staggers, and equine fescue oedema. The aim of this study was, therefore, to develop and validate a quantification method for these and related alkaloids: ergocristine, ergocryptine, ergotamine, ergovaline, lolitrem B, lysergic acid, N-acetylloline, N-formylloline, peramine, and paxilline in horse serum...
May 7, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29779446/repair-of-articular-osteochondral-defects-using-an-integrated-and-biomimetic-trilayered-scaffold
#15
Chenjun Zhai, Hao Fei, Junzheng Hu, Zhen Wang, Shun Xu, Qiang Zuo, Zeng Li, Zhen Wang, Wenwei Liang, Weimin Fan
Repair of articular cartilage defects using bilayered scaffolds is problematic because tissue-engineered cartilage is prone to overgrowth toward subchondral bone resulting in structural abnormalities of cartilage and subchondral bone. A "twice freeze-drying" technique was used to construct a dense isolation layer between the cartilage and subchondral bone layers in an integrated bilayered scaffold to prevent cartilage from excessive downgrowth. Briefly, beta-tricalcium phosphate was used for the subchondral bone layer of the scaffold, high-concentration chitosan/gelatin solution for the dense isolation layer, and low-concentration chitosan/gelatin solution for the cartilage layer...
May 19, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29779063/development-of-sperm-vitrification-protocols-for-two-endangered-salmonid-species-the-adriatic-grayling-thymallus-thymallus-and-the-marble-trout-salmo-marmoratus
#16
Eszter Kása, Jelena Lujić, Zoran Marinović, Tímea Kollár, Gergely Bernáth, Zoltán Bokor, Béla Urbányi, Kinga Katalin Lefler, Dušan Jesenšek, Ákos Horváth
Vitrification was applied to the sperm of two endangered fish species of Soča River basin in Slovenia, the Adriatic grayling (Thymallus thymallus) and marble trout (Salmo marmoratus) following testing different cooling devices and vitrifying media. Sperm was collected, diluted in species-specific non-activating media containing cryoprotectants, and vitrified by plunging directly into liquid nitrogen without pre-cooling. Progressive motility, curvilinear velocity, and straightness of fresh and vitrified-warmed sperm were evaluated with computer-assisted sperm analysis (CASA)...
May 19, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29778393/fertility-preservation-in-pediatric-female-cancer-patients
#17
Sara E Arian, Rebecca L Flyckt, Richard Herman, Hadi Erfani, Tommaso Falcone
OBJECTIVE: To describe and demonstrate ovarian tissue cryopreservation (OTC) as an emerging fertility preservation technique DESIGN: Video presentation. SETTING: University hospital. PATIENT(S): A 6 year-old female patient diagnosed with aplastic anemia with plan for bone marrow transplantation underwent laparoscopic unilateral oophorectomy in conjunction with surgical procedure for port placement by the pediatric surgeon, followed by cryopreservation of ovarian tissue...
May 2018: Fertility and Sterility
https://www.readbyqxmd.com/read/29778369/programming-the-endometrium-for-deferred-transfer-of-cryopreserved-embryos-hormone-replacement-versus-modified-natural-cycles
#18
REVIEW
Eva R Groenewoud, Bernard J Cohlen, Nicholas S Macklon
Over the last decade the use of frozen-thawed embryo transfer has substantially increased, and currently up to one in two embryos transferred has been cryopreserved. To support implantation, endometrial and embryo maturity are required to be synchronized. This can be achieved in various ways. The most commonly applied endometrial preparation methods are the "natural cycle," in which the sequential estrogen and P necessary for endometrial maturation are derived from the developing follicle, and the "artificial" cycle, in which these are sequentially administered...
May 2018: Fertility and Sterility
https://www.readbyqxmd.com/read/29777963/red-wolf-canis-rufus-sperm-quality-and-quantity-is-affected-by-semen-collection-method-extender-components-and-post-thaw-holding-temperature
#19
Ashley D Franklin, William T Waddell, Karen L Goodrowe
Cryopreserving genetic resources is becoming increasingly important for species management. In the zoo-based red wolf (Canis rufus) population, inbreeding continues to increase in the absence of new founders. Through banking sperm, we preserve genetic diversity and create the ability to decrease inbreeding accumulation in the future. The quality and quantity of banked sperm can be affected by cryopreservation media and semen collection methods. This study's objectives were to further optimize semen extender used for red wolf sperm cryopreservation, investigate effects of post-thaw holding temperature, and to determine if urethral catheterization is an effective method for semen collection in this species...
May 16, 2018: Theriogenology
https://www.readbyqxmd.com/read/29777773/progress-in-formulation-development-and-sterilisation-of-freeze-dried-oligodeoxynucleotide-loaded-gelatine-nanoparticles
#20
Katharina J Geh, Madlen Hubert, Gerhard Winter
Oligodeoxynucleotide (ODN)-loaded gelatine nanoparticles (GNPs) have proven their outstanding potential in the treatment of allergic diseases such as equine asthma and canine atopic dermatitis, which are appropriate models for the corresponding human diseases. To encourage the development of a marketable product, long term stability and sterility needs to be ensured. In this work, we aimed to advance freeze-drying options to stabilise ODN-loaded GNPs. Matrix-assisted laser desorption/ionisation mass spectrometry time-of-flight was implemented as a versatile tool to assess ODN stability...
May 16, 2018: European Journal of Pharmaceutics and Biopharmaceutics
keyword
keyword
14126
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"