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Archives of Pathology & Laboratory... Apr 1992Two pilot surveys involving routine semen analysis were provided to eight and nine selected laboratories. The laboratories were selected for expertise and geographic... (Comparative Study)
Comparative Study
Two pilot surveys involving routine semen analysis were provided to eight and nine selected laboratories. The laboratories were selected for expertise and geographic diversity. Manual and computer-assisted semen analysis were performed by the participating laboratories on pooled cryopreserved human semen samples following shipment either on dry-ice pellets or in liquid nitrogen (dry shippers). Coefficient of variation values obtained were 13% to 39% for concentration, 19% to 127% for motility, and 42% to 90% for viability. Motility was impaired for sperm shipped on dry ice. However, variances and performance criteria can be established for all analyses. A semen analysis survey is feasible but expensive owing to the shipping costs of cryopreserved semen.
Topics: Cell Survival; Cryopreservation; Dry Ice; Humans; Insemination, Artificial; Male; Nitrogen; Pilot Projects; Semen; Sperm Motility; Spermatozoa
PubMed: 1558483
DOI: No ID Found -
Forensic Science International Sep 2013Suicides by self-poisoning are common in all parts of the world. Among these intoxications, gases are rarely used, especially carbon dioxide (CO2). Very few cases of...
Suicides by self-poisoning are common in all parts of the world. Among these intoxications, gases are rarely used, especially carbon dioxide (CO2). Very few cases of self-inflicted and deliberate carbon dioxide poisonings have been reported. This paper presents two uncommon suicides by carbon dioxide intoxication. In one case, a 53-year-old man tightly sealed a small bathroom and locked himself in it likely with dry ice. Warning notices were tagged to the door. In another case, a 48-year-old man working in a restaurant committed suicide by closing himself in a walk-in refrigerator and opening the stored carbon dioxide containers intended for the beverage dispensing equipment. The limited possibilities of proving lethal CO2 intoxications post-mortem necessitate a close cooperation of the involved parties during investigation. Only the synopsis of all findings permits a sound assessment regarding the manner and cause of death.
Topics: Brain Edema; Carbon Dioxide; Confined Spaces; Dry Ice; Ethanol; Forensic Pathology; Forensic Toxicology; Humans; Male; Middle Aged; Myocardium; Pulmonary Edema; Suicide
PubMed: 23791381
DOI: 10.1016/j.forsciint.2013.05.013 -
Journal of the American Mosquito... Jun 2008The Centers for Disease Control and Prevention (CDC) light traps and Mosquito Magnet X (MMX) traps baited with dry ice, octenol, and a new formulation (granular) of...
The Centers for Disease Control and Prevention (CDC) light traps and Mosquito Magnet X (MMX) traps baited with dry ice, octenol, and a new formulation (granular) of carbon dioxide (CO2) were evaluated against adult mosquitoes in the field. The results showed that the MMX traps (68.6%) baited with dry ice collected more mosquitoes compared to the CDC light traps (32.4%) only. The CDC traps baited with dry ice (64%) collected significantly more mosquitoes than traps baited with CO2 sachets (11%) or octenol (23%). The MMX traps baited with dry ice (85.5%) collected significantly more mosquitoes than traps baited with CO2 sachets (6.5%) or octenol (9%). The CDC traps baited with the formulations of normal and slow release CO2 sachets collected more mosquitoes than the formulation of fast release sachets. The CDC traps baited with fresh sachets and 24-h-exposed sachets collected significantly more mosquitoes than the traps baited with 48-h- and 72-h-exposed sachets.
Topics: Animals; Appetitive Behavior; Carbon Dioxide; Culicidae; Female; Florida; Mosquito Control; Octanols
PubMed: 18666533
DOI: 10.2987/5701.1 -
Nature Apr 1995
Topics: Dry Ice; Mars
PubMed: 7715695
DOI: 10.1038/374595a0 -
Stain Technology Jul 1974
Topics: Animals; Carbon Dioxide; Cytological Techniques; Dry Ice; Erythrocytes; Freeze Drying; Lung; Rabbits
PubMed: 4602349
DOI: 10.3109/10520297409116978 -
Science (New York, N.Y.) Mar 1929
PubMed: 17784462
DOI: 10.1126/science.69.1787.359 -
Journal of Agricultural and Food... Aug 2019With the monitoring of hundreds of pesticides in food and feed, the comminution step is equally crucial as any other to achieve valid results. However, sample processing... (Review)
Review
With the monitoring of hundreds of pesticides in food and feed, the comminution step is equally crucial as any other to achieve valid results. However, sample processing is often underestimated in its importance and practical difficulty to produce consistent test portions for analysis. The scientific literature is rife with descriptions of microextraction methods, but ironically, sample comminution is often ignored or dismissed as being prosaic, despite it being the foundation upon which the viability of such techniques relies. Cryogenic sample processing using dry ice (-78 °C) is generally accepted in practice, but studies have not shown it to yield representative test portions of <1 g. Remarkably, liquid nitrogen has rarely been used as a cryogenic agent in pesticide residue analysis, presumably as a result of access, cost, and safety concerns. However, real-world implementation of blending unfrozen bulk food portions with liquid nitrogen (-196 °C) using common food processing devices has demonstrated this approach to be safe, simple, fast, and cost-effective and yield high-quality results for various commodities, including increased stability of labile or volatile analytes. For example, analysis of dithiocarbamates as carbon disulfide has shown a significant increase of thiram recoveries (up to 95%) using liquid nitrogen during sample comminution. This perspective is intended to allay concerns among working laboratories about the practical use of liquid nitrogen for improved sample processing in the routine monitoring of pesticide residues in foods and feeds, which also gives promise for feasible test sample size reduction in high-throughput miniaturized methods.
Topics: Animal Feed; Dry Ice; Food Contamination; Freeze Drying; Fruit; Nitrogen; Pesticide Residues
PubMed: 31369261
DOI: 10.1021/acs.jafc.9b04006 -
Journal of Medical Entomology May 2011Vegetation patterns and the presence of large numbers of nesting herons and egrets significantly altered the number of host-seeking Culex tarsalis Coquillett (Diptera:...
Vegetation patterns and the presence of large numbers of nesting herons and egrets significantly altered the number of host-seeking Culex tarsalis Coquillett (Diptera: Culicidae) collected at dry ice-baited traps. The numbers of females collected per trap night at traps along the ecotone of Eucalyptus stands with and without a heron colony were always greater or equal to numbers collected at traps within or under canopy. No Cx. tarsalis were collected within or under Eucaplytus canopy during the peak heron nesting season, even though these birds frequently were infected with West Nile virus and large number of engorged females could be collected at resting boxes. These data indicate a diversion of host-seeking females from traps to nesting birds reducing sampling efficiency.
Topics: Animals; Birds; California; Culicidae; Dry Ice; Entomology; Environment; Female; Population Density
PubMed: 21661310
DOI: 10.1603/me10273 -
Journal of the American Mosquito... Dec 2011During a mosquito collection, a female of the pigeon louse fly, Pseudolynchia canariensis (Diptera: Hippoboscidae), was collected by a mosquito trap baited with dry ice...
During a mosquito collection, a female of the pigeon louse fly, Pseudolynchia canariensis (Diptera: Hippoboscidae), was collected by a mosquito trap baited with dry ice in Ishigaki-jima, Yaeyama Islands, Japan. This is the 1st record of P. canariensis from Yaeyama Islands.
Topics: Animals; Demography; Diptera; Dry Ice; Female; Insect Control; Japan
PubMed: 22329280
DOI: 10.2987/11-6183.1 -
Journal of Food Protection Jul 1992A selective-differential medium for isolation of Campylobacter jejuni from chicken carcasses was developed. The medium, Campy-Cefex, consisted of Brucella agar, 5% lysed...
A selective-differential medium for isolation of Campylobacter jejuni from chicken carcasses was developed. The medium, Campy-Cefex, consisted of Brucella agar, 5% lysed horse blood, 0.05% ferrous sulfate (FeSO.7HO), 0.05% sodium pyruvate, 0.02% sodium bisulfite, and antibiotic supplements of 33 mg/L sodium cefoperazone and 200 mg/L cycloheximide. A total of 41 chicken carcass samples were plated onto Campy-Cefex, Campylobacter cefoperazone desoxycholate agar, and Campylobacter brucella agar plate media. Campy-Cefex proved as productive and selective as the other media. Campy-Cefex allowed for easier differentiation of C. jejuni from other flora compared to differentiation on Campylobacter cefoperazone desoxycholate agar medium. Differentiation of the non- Campylobacter spp. flora from Campylobacter spp. was the same on both Campy-Cefex and Campy-BAP. The selectivity for the organism on Campy-Cefex was better than on Campy-BAP. Growth of seven isolates of C. jejuni in microaerobic-(5% O, 10% CO, 85% N) and dry ice-generated atmospheres was also assessed. After 24 h of incubation, the mean log CFU generated, using the same culture suspensions and medium, was 2.07 and 1.81 for the microaerobic and dry ice atmospheres, respectively. These two developments allow for simplification of materials and methods required to isolate C. jejuni from foods.
PubMed: 31071893
DOI: 10.4315/0362-028X-55.7.514