The world is in the midst of a huge fundamental shift in fibre supply, demand balances, and policy changes. Governments around the world are introducing policy changes which influence the supply demand balance as the politicians' thoughts are uttered. Government agencies and their bureaucrats are imposing changes on industry even before the legislation is passed by the government in question.
This hoc change process will continue for a time to come until the countries in question show a tough-mindedness with regard to their land use policies. Policies affecting forest areas such as protection areas, Native land claims, the protection of biodiversity and a true goal of sustainable development ; which addresses the combined issues of cultural, environmental, social and economic matters.
Eventually all of these difficult issues will reach essential closure. Then there will be great new opportunities for investment to meet the growing demand for forest products ; leading to a strengthening competitive position in the more traditional producing areas such as Canada.

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Urinary estrogens have been assayed chiefly with the Kober hydroquinone colorimetry or sulfuric acid fluorimetry. However, it is difficult to determine accurately small amounts of estrogens such as in urines from males, oophorectomized women or menopausal women. In this study, male urinary estrogens were determined by a modification of the method reported by Kambegawa and some experimental studies were made on male urines. 200ml aliquot of 24-hour urine is hydrolyzed by the -step hydrolysis, added with estrone-6, 7³H, 17β-estradiol-6, 7³H and estriol-6, 7³H, and extracted with ether, followed by alkaline washes, methylation by a supersonic wave mixer, thin layer and column chromatography, liquid scintillation spectrometry and the Ittrich fluorometry. Results of experimental studies and estimation of urinary estrogens in males are as follows: 1) After the -step hydrolysis, 54.5% of the urinary estrogens were collected as the glucuronide, 30% in the solvolyzed fraction and 15.5% as the hot acid hydrolyzate. 2) The methylation of estrogens was achieved 10-20% better by the use of the supersonic wave mixer than by a magnetic stirrer. ) Calculating efficiency of the Packard Tri-carb liquid scintillation spectrometer was tested in varieties of the estrogen concentrations using the dilution and the external standardization methods. There was noted no influence of the estrogen concentrations on the counting efficiency in the determination ranges. ) In the range of 2×10-

3

-

1.0μg

, a linear relationship on the standard curve was obtained applying the Allen's correction, when fluorometry was conditioned with the excitation light wave length of 510mμ and the fluorescence wave lengths of 530, 550 and 570mμ for each of the three estrogen-methyl ethers. 5) Urinary estrogens were determined in 15 normal males. In 5 subjects (2-13 years old) the values were:

E₁

: 1.06±1.09;

E₂

:

0

.64±

0

.54;

E₃

:

0

.76±

0

.68 and the total

E

: 2.46±1.99μg/24hr. In 5 men (

22

-38 years old),

E₁

: 5.02±1.57;

E₂

: 2.58±

0

.21;

E₃

:

4

.11±1.

82

and the total

E

: 11.72±

2.97μg

/24hr. In 5 men (46-72 years old),

E₁

:

3

.

81

±

0

.31;

E₁

: 1.71±

0

.48;

E₃

:

3

.51±

0

.

94

and the total

E

: 9.03±1.33μg/24hr. 6) Urinary estrogens were also determined in patients with a variety of clinical syndromes.

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