The diffusion and toxicity of the fumigant chloropicrin injected in sugar maple and white birch tree

1987 ◽  
Vol 17 (12) ◽  
pp. 1552-1556
Author(s):  
Barry Goodell ◽  
Johannes P. Hosli ◽  
Bradley Kropp
Keyword(s):  
Sugar Maple ◽  
Response To Treatment ◽  
White Birch ◽  
Decay Fungi ◽  
Treatment Site ◽  
Birch Tree ◽  
Birch Trees ◽  
One Year

Twenty sugar maple (Acersaccharum Marsh.) and 20 white birch trees (Betulapapyrifera Marsh.), all containing columns of decayed or discolored wood, were bored and injected with one of three dosages of chloropicrin or were left untreated. One year after treatment, four trees of each species were felled and dissected. The wood was then analyzed for fumigant concentration and assayed for the presence of fungi. All remaining trees were inspected yearly for adverse response to treatment. Three years after treatment, dieback and leaf discoloration were apparent in birch trees treated with moderate to high dosages of chloropicrin. No adverse response to treatment was apparent in any maple tree or in birch trees treated with low dosages of chloropicrin. In the dissected trees, chloropicrin vapors were generally detected in the interior of the trees at sites 0.5 m above and 0.5 m below the treatment site. In the higher dosage birch trees, chloropicrin was detected more frequently and in higher concentrations from outer sapwood. Control of the causal decay fungi in the trees was not ascertained in this study; however, in the birch trees, growth of opportunistic decay fungi was inhibited in sections from treated but not untreated trees.

SUGAR PRODUCTION BY WHITE AND YELLOW BIRCHES

1944 ◽  
Vol 22c (1) ◽  
pp. 1-6 ◽  
Author(s):  
L. P. V. Johnson
Keyword(s):  
Sugar Maple ◽  
Invert Sugar ◽  
Sugar Production ◽  
White Birch ◽  
Yellow Birch ◽  
Corn Syrup ◽  
Birch Trees

White and yellow birch trees produced an abundance of sap, but the yield of sugar was on the average only about one-third that of the sugar maple. Results indicate that yellow birch sap contains invert sugar with small amounts of sucrose, and that white birch sap contains a mixture of fructose and invert sugar. Syrups prepared from white and yellow birch saps by concentrating 100 times were similar in taste and appearance to commercial corn syrup.

Succession des micro-organismes à la suite de blessures artificielles au tronc chez le bouleau jaune (Betulaalleghaniensis Britt.) et l'érable à sucre (Acersaccharum Marsh.)

1971 ◽  
Vol 1 (2) ◽  
pp. 113-120 ◽  
Author(s):  
André Lavallée ◽  
Alain Bard
Keyword(s):  
Sugar Maple ◽  
Natural Infection ◽  
General Decay ◽  
Yellow Birch ◽  
Decay Fungi ◽  
Linear Extent ◽  
Birch Trees

Xylem of sugar maple and yellow birch trees were exposed to natural infection by making axe blazes to simulate mechanical injuries. After 8, 21, and 34 months, dissection and isolations made from the discolored wood permitted the localization of certain microorganisms in three arbitrarily determined zones. Longitudinal and radial development of discoloration associated with wounds was more rapid in yellow birch than in sugar maple. There was evidence of a succession of organisms in the colonization of the wounds which was subsequent to the first discoloration process and involved different organisms in the two hosts. In general, decay fungi did not appear until after 21 months. Cytosporadecipiens occurred exclusively in discolored wood of sugar maple while Phialophora spp. and Cephalosporium sp. dominated the discolored wood of yellow birch. Bacteria were more frequent in yellow birch than in sugar maple. Relationships between size of injuries, linear extent of the discoloration produced, and identity of the various organisms involved are also presented.

Isolation of wood-inhabiting fungi from Canadian hardwood logs

2005 ◽  
Vol 51 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Dian-Qing Yang
Keyword(s):  
Wood Species ◽  
Sugar Maple ◽  
Fungal Species ◽  
Wood Products ◽  
Economic Losses ◽  
White Birch ◽  
Decay Fungi ◽  
Fungal Isolation ◽  
Trichoderma Species ◽  
Ophiostoma Piceae

Wood-inhabiting fungi include many molds, wood-staining fungi, and decay fungi. Most of these fungal species can result in economic losses to wood users. Studies on molds, staining fungi, and decay fungi are necessary to be able to control their growth on wood and wood products. In this study, wood-inhabiting fungi were isolated from logs of 3 major Canadian hardwood species: sugar maple, white birch, and yellow birch. Two media were used for isolation. From these 3 wood species, a total of 1198 fungal cultures were obtained from summer- and winter-harvested logs in dry storage and under water sprinkling. The results showed that most fungal species were not host specific and affected all of the wood species tested. Frequently isolated molds were Alternaria alternata, Trichoderma species, and Mucor/Rhizopus (Zygomycota) species, frequently isolated staining fungi were Ophiostoma piceae and Ophiostoma piliferum, a frequently isolated bark saprophyte was Nectria cinnabarina, and frequently isolated decay fungi were taxa of the phylum Basidiomycota. More fungal species were isolated from summer-harvested logs than from winter-harvested logs. Fewer fungal cultures, especially decay fungi, were isolated from logs in early storage than from logs in late storage.Key words: molds, wood-staining fungi, decay fungi, fungal isolation, log storage.

scholarly journals A206 EVOLUTION OF PEDIATRIC AUTOIMMUNE CHOLANGITIS AND PRIMARY SCLEROSING CHOLANGITIS INTO ADULTHOOD

2021 ◽  
Vol 4 (Supplement_1) ◽  
pp. 234-236
Author(s):  
P Willems ◽  
J Hercun ◽  
C Vincent ◽  
F Alvarez
Keyword(s):  
Primary Sclerosing Cholangitis ◽  
Sclerosing Cholangitis ◽  
Response To Treatment ◽  
Similar Proportion ◽  
Autoimmune Cholangitis ◽  
Significant Difference ◽  
One Year ◽  
Liver Tests

Abstract Background The natural history of primary sclerosing cholangitis (PSC) in children seems to differ from PSC in adults. However, studies on this matter have been limited by short follow-up periods and inconsistent classification of patients with autoimmune cholangitis (AIC) (or overlap syndrome). Consequently, it remains unclear if long-term outcomes are affected by the clinical phenotype. Aims The aims of this is study are to describe the long-term evolution of PSC and AIC in a pediatric cohort with extension of follow-up into adulthood and to evaluate the influence of phenotype on clinical outcomes. Methods This is a retrospective study of patients with AIC or PSC followed at CHU-Sainte-Justine, a pediatric referral center in Montreal. All charts between January 1998 and December 2019 were reviewed. Patients were classified as either AIC (duct disease on cholangiography with histological features of autoimmune hepatitis) or PSC (large or small duct disease on cholangiography and/or histology). Extension of follow-up after the age of 18 was done for patients followed at the Centre hospitalier de l’Université de Montréal. Clinical features at diagnosis, response to treatment at one year and liver-related outcomes were compared. Results 40 patients (27 PSC and 13 AIC) were followed for a median time of 71 months (range 2 to 347), with 52.5% followed into adulthood. 70% (28/40) had associated inflammatory bowel disease (IBD) (78% PSC vs 54% AIC; p=0.15). A similar proportion of patients had biopsy-proven significant fibrosis at diagnosis (45% PSC vs 67% AIC; p=0.23). Baseline liver tests were similar in both groups. At diagnosis, all patients were treated with ursodeoxycholic acid. Significantly more patients with AIC (77% AIC vs 30 % PSC; p=0.005) were initially treated with immunosuppressive drugs, without a significant difference in the use of Anti-TNF agents (0% AIC vs 15% PSC; p= 0.12). At one year, 55% (15/27) of patients in the PSC group had normal liver tests versus only 15% (2/13) in the AIC group (p=0.02). During follow-up, more liver-related events (cholangitis, liver transplant and cirrhosis) were reported in the AIC group (HR=3.7 (95% CI: 1.4–10), p=0.01). Abnormal liver tests at one year were a strong predictor of liver-related events during follow-up (HR=8.9(95% CI: 1.2–67.4), p=0.03), while having IBD was not (HR=0.48 (95% CI: 0.15–1.5), p=0.22). 5 patients required liver transplantation with no difference between both groups (8% CAI vs 15% CSP; p=0.53). Conclusions Pediatric patients with AIC and PSC show, at onset, similar stage of liver disease with comparable clinical and biochemical characteristics. However, patients with AIC receive more often immunosuppressive therapy and treatment response is less frequent. AIC is associated with more liver-related events and abnormal liver tests at one year are predictor of bad outcomes. Funding Agencies None

scholarly journals Caspase-Cleaved Keratin 18 Measurements Identified Ongoing Liver Injury after Bariatric Surgery

2021 ◽  
Vol 10 (6) ◽  
pp. 1233
Author(s):  
Felix Hempel ◽  
Martin Roderfeld ◽  
Lucas John Müntnich ◽  
Jens Albrecht ◽  
Ziya Oruc ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Liver Disease ◽  
Liver Injury ◽  
Response To Treatment ◽  
Morbidly Obese ◽  
Alcoholic Fatty Liver ◽  
Laboratory Parameters ◽  
Nafld Fibrosis Score ◽  
Keratin 18 ◽  
One Year

Bariatric surgery has emerged as an effective treatment option in morbidly obese patients with non-alcoholic fatty liver disease (NAFLD). However, worsening or new onset of non-alcoholic steatohepatitis (NASH) and fibrosis have been observed. Caspase-cleaved keratin 18 (ccK18) has been established as a marker of hepatocyte apoptosis, a key event in NASH development. Thus, ccK18 measurements might be feasible to monitor bariatric surgery patients. Clinical data and laboratory parameters were collected from 39 patients undergoing laparoscopic Roux-en-Y gastric bypass at six timepoints, prior to surgery until one year after the procedure. ccK18 levels were measured and a high-throughput analysis of serum adipokines and cytokines was carried out. Half of the cohort’s patients (20/39) presented with ccK18 levels indicative of progressed liver disease. 21% had a NAFLD-fibrosis score greater than 0.676, suggesting significant fibrosis. One year after surgery, a mean weight loss of 36.87% was achieved. Six and twelve months after surgery, ccK18 fragments were significantly reduced compared to preoperative levels (p < 0.001). Yet nine patients did not show a decline in ccK18 levels ≥ 10% within one year postoperatively, which was considered a response to treatment. While no significant differences in laboratory parameters or ccK18 could be observed, they presented with a greater expression of leptin and fibrinogen before surgery. Consecutive ccK18 measurements monitored the resolution of NAFLD and identified non-responders to bariatric surgery with ongoing liver injury. Further studies are needed to elicit the pathological mechanisms in non-responders and study the potential of adipokines as prognostic markers.

Bulimia nervosa: treatment and short-term outcome

1986 ◽  
Vol 16 (1) ◽  
pp. 65-70 ◽  
Author(s):  
L. K. George Hsu ◽  
Diane Holder
Keyword(s):  
Treatment Outcome ◽  
Bulimia Nervosa ◽  
Response To Treatment ◽  
Dropping Out ◽  
Methodological Issues ◽  
Short Term ◽  
Term Outcome ◽  
Short Term Outcome ◽  
Duration Of Illness ◽  
One Year

SynopsisFifty-six bulimia nervosa patients were treated by means of a behavioural approach and followed for at least one year after completion or dropping out of treatment. Outcome was encouraging in about half of the patients and several psychiatric indicators, such as duration of illness and response to treatment, were identified. The significance of the findings and unresolved methodological issues are discussed.

scholarly journals Treatment of children and adolescents with hemangioma using propranolol: preliminary results from a retrospective study

2014 ◽  
Vol 132 (1) ◽  
pp. 48-54 ◽  
Author(s):  
Juliana Costa Albuquerque ◽  
Rosane Aline Magalhaes ◽  
Jamille Araujo Felix ◽  
Maria Vilani Rodrigues Bastos ◽  
Juvenia Bezerra Fontenele ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Children And Adolescents ◽  
Previous Treatment ◽  
Capillary Hemangioma ◽  
Response To Treatment ◽  
Vascular Tumors ◽  
Lesion Volume ◽  
Chi Square ◽  
One Year ◽  
Almost All

CONTEXT AND OBJECTIVE: Hemangiomas are the commonest vascular tumors during childhood. In 2008, the effect of propranolol for treating capillary hemangiomas was demonstrated. Other similar results followed, showing that it rapidly reduces lesion volume. The objective here was to evaluate children and adolescents with hemangiomas that were treated with propranolol. DESIGN AND SETTING: Retrospective study, conducted in a children's hospital. METHODS : Patients aged 0-19 years with or without previous treatment, who were treated between January 2009 and December 2010, were included. The response was assessed by comparing the lesion appearance between the start of treatment and the last consultation. We considered partial or complete responses as the response to treatment. RESULTS : Sixty-nine patients with a median follow-up of 11 months (mean age: 31 months) were included. Of these, 58 patients were recently diagnosed and 11 had had previous treatment. A response (partial or complete) was seen in 60 patients (87%). Among the capillary hemangioma cases, responses were seen in 50 out of 53 (94%), while in other lesion types, it was 10 out of 16 (63%) (P = 0.3; chi-square). Responses in patients less than one year of age were seen in 37 out of 38 (97%), whereas in those over one year of age, in 23 out of 31 (74%) (P = 0.4; chi-square). Side effects were uncommon and mild. CONCLUSIONS: Propranolol seemed to be effective for treatment of hemangiomas in children and adolescents, and not just in the proliferative stage, with responses in almost all the patients.

Sap yields, sugar content, and soluble carbohydrates of saps and syrups of some Canadian birch and maple species

1987 ◽  
Vol 17 (3) ◽  
pp. 263-266 ◽  
Author(s):  
A. R. C. Jones ◽  
I. Alli
Keyword(s):  
Sap Flow ◽  
Sugar Maple ◽  
Sugar Content ◽  
Soluble Carbohydrates ◽  
Red Maple ◽  
White Birch ◽  
Yellow Birch ◽  
Total Carbohydrate ◽  
Total Carbohydrate Content ◽  
Maple Sap

During the spring of 1984 and 1985, white birch (Betulapapyrifera Marsh), sweet birch (B. lenta L), and yellow birch (B. alleghaniensis Britt.) were tapped to determine sap yields and syrup characteristics. These properties were compared with sap yields and syrup produced from sugar maple (Acersaccharum Marsh) and red maple (A. rubrum L). The sap flow seasons were as follows: white birch, 23 days (April 7–29, 1984) and 29 days (April 5 – May 3, 1985); sweet birch, 26 days (1984); yellow birch, 25 days (1985). The sap flow season for the maple species was much earlier than the birch species. Maple sap flow seasons were as follows: sugar maple, 16 days (March 28 – April 12, 1984) and 45 days (March 10 – April 23, 1985); red maple, 44 days (March 11 – April 23, 1985). Sap yields were as follows: white birch, 80.5 L in 1984 (1.0% sap) 51.0 L in 1985 (1.0% sap); sweet birch, 48.0 L in 1984 (0.5% sap); yellow birch, 28.4 L in 1985 (0.5% sap); red maple, 30.6 L in 1985 (2.3% sap); sugar maple, 53.5 L in 1985 (4.5% sap). Sap analyses showed the average total carbohydrate content of all birch saps and all maple saps was 9.2 and 24.5 g/L, respectively. The average sugar contents of the syrups from the birch saps and the maple saps were 302 and 711 g/L, respectively. The average pH of birch and maple saps were similar but the average pH of the syrups obtained from the birch saps was substantially lower than that of the syrups obtained from the maple saps.

scholarly journals Interrelations of Wood Physical and Mechanical Properties and Patterns of Their Change within the Birch Stem

2021 ◽  
pp. 150-159
Author(s):  
Vladimir I. Fedyukov ◽  
◽  
Vasilii Yu. Chernov ◽  
Maria S. Chernova ◽  
Olga V. Tsoy
Keyword(s):  
Mechanical Properties ◽  
Sound Propagation ◽  
Physical And Mechanical Properties ◽  
Tree Height ◽  
Productive Capacity ◽  
State University ◽  
Wood Fibers ◽  
Middle Volga Region ◽  
Birch Tree ◽  
Birch Trees

The physical and mechanical properties of standing wood are not constant along the tree height and diameter. They also differ depending on the tree species and conditions of its growth. So, the research purpose is to identify patterns of change and interrelations between the parameters of density, compressive strength and sound propagation velocity along the wood fibers inside the stem of a birch tree growing in the forests of the Middle Volga region of Russia, where such research had never been conducted before. The work was carried out on two sampling areas laid out by standard methods in birch forests of natural origin with average productive capacity on the territory of the Scientific-Experimental Forest District of the Volga State University of Technology in the Mari El Republic. The average age of the birch trees is about 70 yrs, breast height diameter is 30 cm, and height is 28.5 m; 14 sample trees were studied; 0.5 m long chucks were cut out from their stems at a height of 1.3 m from the butt end and at relative heights of 0.25H, 0.5H, and 0.75H. Experimental work was carried out in a laboratory environment with modern technical facilities using standard procedures. Mathematical models describing the changes in the parameters stated above and the interrelations between them with regard to the stem diameter at relative heights were obtained. The research results generally confirmed the findings of other researchers on densitograms and other physical and mechanical properties of wood within the tree stem. However, the features listed above were revealed for birch trees growing under such conditions; in particular, it concerns the ratio of strength and density, as well as the wood strength and the velocity of sound propagation through the fibers. The results obtained have both scientific and practical value as a basis for the development of a non-destructive method for predicting technical properties of standing wood as well as timber for producing assortments for special purposes. For citation: Fedyukov V.I., Chernov V.Yu., Chernova M.S., Tsoy O.V. Interrelations of Wood Physical and Mechanical Properties and Patterns of Their Change within the Birch Stem. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 6, pp. 150–159. DOI: 10.37482/0536-1036-2021-6-150-159

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